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WO2024260578A1 - Procédé et dispositif de vérification et d'évaluation de la qualité d'une connexion enfichable - Google Patents

Procédé et dispositif de vérification et d'évaluation de la qualité d'une connexion enfichable Download PDF

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Publication number
WO2024260578A1
WO2024260578A1 PCT/EP2024/025181 EP2024025181W WO2024260578A1 WO 2024260578 A1 WO2024260578 A1 WO 2024260578A1 EP 2024025181 W EP2024025181 W EP 2024025181W WO 2024260578 A1 WO2024260578 A1 WO 2024260578A1
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WO
WIPO (PCT)
Prior art keywords
signal
signals
trigger signal
characteristic
operator
Prior art date
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PCT/EP2024/025181
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German (de)
English (en)
Inventor
Thomas WELFERS
Anne Völkel
Otfried Schwarzkopf
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Voss Automotive GmbH
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Voss Automotive GmbH
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Filing date
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Publication of WO2024260578A1 publication Critical patent/WO2024260578A1/fr
Pending legal-status Critical Current
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
    • H01R43/26—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for engaging or disengaging the two parts of a coupling device
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/64—Means for preventing incorrect coupling
    • H01R13/641—Means for preventing incorrect coupling by indicating incorrect coupling; by indicating correct or full engagement
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R2201/00—Connectors or connections adapted for particular applications
    • H01R2201/20—Connectors or connections adapted for particular applications for testing or measuring purposes

Definitions

  • the invention relates to a method for checking and evaluating the quality of a plug connection of a connector, wherein a first signal is detected and evaluated, as well as a device for carrying out the method.
  • the assembly force is strongly influenced by the person carrying out the assembly, and depends on the hand carrying out the assembly, the hand position, the sequence of movements and any possible jamming of the components to be assembled.
  • an incorrect plug connection will be discovered at the latest during the end-of-line test.
  • an incorrectly installed plug connection of such a connector requires complex and therefore expensive rework to fix the problem of the incorrectly plugged connector.
  • a control system and a method for controlling the assembly of a coupling device comprising at least one connector, wherein a mobile sensor device is arranged in the immediate vicinity of the signal source of the connector.
  • the signal is an electronic and/or acoustic or Sound signal.
  • the signal emitted during the plugging process is recorded and evaluated. If a sound signal, i.e. the characteristic sound of a plugging process, such as the characteristic sound of the locking or clicking of the retaining element of a connector, is emitted as a signal, this is recorded during the plugging process and evaluated in an evaluation unit.
  • the recorded signal or sound can be separated from interference signals, in particular interference noise, and then checked to see whether proper locking has taken place, i.e.
  • the mobile sensor device is designed to detect a structure-borne and/or airborne sound signal. To detect structure-borne sound, the mobile sensor device is brought into vibrational contact with the coupling device and/or the at least one locking cam on it.
  • the mobile sensor device is arranged on a carrier material or integrated into it, with the carrier material being disclosed as, for example, an assembly glove and/or an item of clothing and/or a device that can be worn on a person's body, such as a belt, a watch or a bracelet, into which the mobile sensor device can be or is integrated.
  • the data recorded by the mobile sensor device is evaluated in a decentralized evaluation unit arranged nearby and/or in a central evaluation unit. The recorded data is transmitted via WLAN, Bluetooth, cable, one or more USB interfaces or via radio.
  • a device and a method for monitoring an assembly of two components by means of a click fastening for connecting the components are known, wherein a sensor for detecting an assembly force and a sound receiver are present.
  • the force applied to at least one of the two components is measured by means of a device used to connect the two components and the sound generated during the assembly of the two components.
  • the course of the measured force is recorded as a function of time and/or the course of the measured sound as a function of time.
  • the course of the force as a function of time and/or the course of the sound in The force versus time characteristics are evaluated and a signal is generated which indicates the quality of the assembly of the click fastening if the progression of the force versus time and/or the progression of the sound versus time corresponds to a predetermined criterion.
  • the acceleration of a finger and/or a hand of an operator carrying out the assembly is measured.
  • the assembly force as a signal is only suitable to a limited extent, as this depends on the person carrying out the assembly. For example, misalignment of the two components during the plug-in process has a major influence on the assembly force.
  • the assembly force is difficult to detect and requires complex measuring sensors. This makes the process prone to errors.
  • the acoustic sensor is susceptible to interference from distant background noise, such as the volume in an assembly hall. Assessing a proper plug connection and an improper one using an acoustic sensor and a motion sensor at the same time increases reliability and selectivity, but requires rapid processing of the recorded data, which entails a comparatively high effort in terms of high performance of the electronic components and in terms of size.
  • a system for ensuring the joining of a connector in which a microphone is arranged near the joining zone of electrical connectors, wherein the microphone is designed to detect an audible noise as soon as the electrical connector is joined. Furthermore, an output unit is provided which is connected to the microphone and receives the audio signals from the microphone. The output unit processes the audio signals to ensure the joining connection. The output unit filters out background noise to amplify the audio signals. Due to the use of an acoustic sensor, the system is suitable for applications in which a low to medium selectivity is sufficient and/or in environments in which little noise influences the measurement result. The evaluation shows a limitation in the distinction between a proper connector and an improper one.
  • WO 2017/062124 A1 also discloses a system for ensuring a joint connection of a connector.
  • This comprises a sensor unit worn by the user, which is worn near or on the hand of the operator, wherein the sensor unit comprises an acoustic sensor which is arranged near a joint zone of electrical connectors.
  • the acoustic sensor can detect an acoustic noise as soon as the electrical connector is joined.
  • the system also comprises a controller worn by the user, which is connected to the acoustic sensor, wherein the controller receives the audio signals from the acoustic sensor and processes the audio signals to determine the joint status of a connector. The controller gives the operator feedback regarding the joint status of the connector.
  • this system is also suitable for applications in which a low to medium selectivity is sufficient and/or in environments in which only little noise influences the measurement result.
  • the evaluation results in a limitation in the ability to distinguish between a proper plug connection and an improper one.
  • WO 2017/062122 A1 Another system for ensuring a joint connection of a connector is known from WO 2017/062122 A1.
  • This comprises an acoustic sensor that is arranged near a joining zone of electrical connectors, wherein the acoustic sensor is designed to detect audible noises as soon as the electrical connector is joined.
  • a connector identification sensor is provided that is arranged near the electrical connectors. The connector identification sensor is designed to identify the presence of electrical connectors.
  • the system comprises a controller that is connected to the acoustic sensor and the connector identification sensor, wherein the controller receives the connector identification signals from the connector identification sensor, as well as the acoustic signals from the acoustic sensor. The controller processes the connector identification signals and the acoustic signals for Safety test of the joint connection.
  • the connection identification sensor does not contribute to the evaluation of the plug connection, i.e. the question of whether it is correct or not, so that here too there is a limitation in the discriminatory power between a correct plug
  • FR 3 024 522 B1 discloses a system and a method for determining the locking of a manual connection of a lockable quick connector.
  • a carrier is fixed to an operator, with at least one acoustic sensor being provided for measuring acoustic signals emitted by the connection.
  • the measured acoustic signal is recorded.
  • the recorded acoustic signals are filtered and compared with acoustic reference signals that are representative of the locking state of the connector, with a result of this comparison being obtained at the same time.
  • a message is sent to the operator with regard to whether a locked state has been achieved or not.
  • the method also includes detecting a movement of a first hand of the operator in order to measure movements of this first hand that are representative of the attempt to connect the connector.
  • the detection of the movements serves to trigger the start of the measurement and recording of the acoustic signals.
  • an auxiliary recording of the movements of the first hand, which were measured during the recording of the movements, and an auxiliary filtering of the recorded movements of the first hand and subsequently an auxiliary comparison of the recorded and filtered movements of the first hand with the reference movements which show an attempt at connection are provided. As soon as a movement of the user's first hand is detected, a recording is triggered.
  • Acoustic signals are recorded over a period of time and the filters and the comparison devices process the signals at an interval which lasts from a few tenths of a second before a trigger state t 0 to a few tenths of a second after.
  • the methods known in the prior art for checking and evaluating the quality of a plug connection thus evaluate signals that are recorded via one or more sensor channels during a click sound during a plugging process, i.e. in particular airborne and structure-borne sound signals.
  • the acoustic signals are continuously recorded and analyzed and the click signal is identified by continuously analyzing the recorded signals, whereby the characteristics of the recorded acoustic signals are examined for the characteristic click signal. If predetermined limit values are exceeded, such as a certain sound pressure level in a certain frequency range, this signal characteristic is assigned to a click signal and the plug connection is classified as "OK".
  • the present invention is therefore based on the object of providing a method for checking and evaluating the quality of a plug connection of a connector, wherein a first signal is detected and evaluated, as well as a device for carrying out the method, in which the susceptibility to errors can be significantly reduced compared to the solutions of the prior art.
  • the object is achieved for a method according to the preamble of claim 1 in that the first signal from a first detection device and at least one second signal from at least one second detection device are continuously detected and recorded in at least one recording device, at least one trigger signal triggers the opening of a measuring window and the presence of at least two signals characteristic of a proper plugging process within the measuring window is checked by at least one evaluation unit, wherein the at least one trigger signal is located before the measuring window, within the measuring window or after the measuring window.
  • the object is achieved in that the device comprises at least one first detection device for detecting a first signal, at least one second detection device for detecting at least one second signal, at least one recording device for recording the detected signals, at least one trigger signal detection device for detecting at least one trigger signal, at least one device for opening a measuring window when the at least one trigger signal is present and at least one evaluation unit for evaluating the presence of at least two signals characteristic of a proper plugging process within the measuring window.
  • the signals on which the evaluation is based can be an acoustic signal that can be detected or detected by at least one acoustic detection device and at least one further signal can be detected.
  • at least one of the signals to be detected or detected can be an acoustic signal and/or at least one of the signals to be detected or detected can be a speed signal, acceleration signal, motion signal or position or attitude signal.
  • a detection device for detecting an acceleration signal can detect this with a high sampling rate, e.g.
  • One of the detectable or detected signals can therefore be an acceleration signal that is detected by a corresponding detection device for detecting acceleration, such as an acceleration sensor.
  • a corresponding detection device for detecting acceleration such as an acceleration sensor.
  • Such a sensor works with a high sampling rate.
  • the high-frequency components of the signal dissipate quite quickly over the propagation path, while low-frequency signals can also spread over longer distances.
  • the sensor channels or detection devices for detecting the signals such as an acceleration sensor, which work with comparatively high sampling rates, result in a very large amount of data being generated, from which the signals characteristic of a proper plugging process must be determined.
  • the amount of data on which the evaluation of the quality of the plug connection is based is limited by providing a measurement window that is opened by at least one trigger signal.
  • the probability that another event that generates a similar signal characteristic to that of the characteristic signals falls within this same time or measurement window is very low.
  • additional signals and information from the assembly process of the connector are used, which coincide very closely with the characteristic signals to be expected. These signals and information can be present or appear before the characteristic signals, at the same time as them or after the characteristic signals. Accordingly, these information and signals serve as the at least one trigger signal for opening the measurement window, whereby the at least one trigger signal can be before the measurement window, within the measurement window or behind or after the measurement window.
  • the at least two Signals are recorded, it is possible to open the measurement window retrospectively when the at least one predetermined trigger signal occurs, so that the measurement window is before the occurrence of the at least one trigger signal. Since the presence of the expected signals characteristic of a correct plugging process is expected within the measurement window and their occurrence is checked by at least one evaluation unit, the quality of the assessment of whether the plug connection of the connector is good, i.e. high, or bad, can be easily evaluated. The smaller and more precisely the measurement window can be spanned around the occurrence of the characteristic signals, the higher the quality of the check of the plug connection and the less likely such an assessment is to be error-prone.
  • the evaluation of whether a proper plug connection is present is based on at least two signals, for the detection of which at least two channels of a detection device, such as at least two sensor channels of a sensor, or at least two detection devices, such as sensors. These can provide the at least one trigger signal for opening the measurement window. This makes it possible for the opening duration or time span of the measurement window to be in the millisecond range.
  • WO 2016/070984 A1 does not disclose a measurement window for limiting the amount of data to be processed, nor a trigger signal.
  • the at least one trigger signal can be a position signal of the position of an operator's hand performing a plugging process.
  • the position of the operator's hand performing the plugging process can advantageously be used to limit the measurement window as information from the assembly plugging process. If the respective hand or hands of the operator are located near the corresponding assembly point at which the plugging process is to take place, the occurrence of the characteristic signals is also to be expected. It is therefore possible to limit the measurement window, which is spanned around the expected characteristic signals, to exactly that time range in which the respective hand of the operator performing the The operator carrying out the plugging process is in the expected spatial position in relation to the connector.
  • the position signal can be determined, for example, by geo-fencing. It is also possible to capture the position signal by at least one optical device, such as a camera, and/or by means of a gyroscopic device and/or by means of a radio-based tracking device.
  • the at least one trigger signal can be a predeterminable sequence of movements of an operator's hand performing a plugging process. This can increase the accuracy of the determination of the measurement window even further, since not only the position of the hand, but also characteristic hand movements belonging to the respective plugging or assembly process and/or a specific process step of the plugging process are identified.
  • This sequence of movements serves as a trigger signal for opening the measurement window.
  • the at least one trigger signal can be an acknowledgment signal or an acknowledgment gesture signal after completion of a plugging process.
  • Such an acknowledgment gesture signal indicates that the plugging process has been completed. Accordingly, the period immediately before the occurrence of the acknowledgment gesture signal can be searched for the characteristic signals in the recorded data and, if they are present, a correct plugging process can be confirmed.
  • it is also possible to send an acknowledgment signal as a trigger signal instead of an acknowledgment gesture signal after completion of a plugging process for example by the operator pressing a corresponding acknowledgment button.
  • Such a trigger signal can also open the measurement window into the past of the recorded data, as with the acknowledgment gesture signal as a trigger signal, and the characteristic signals that indicate a correct plugging process can be found in the recorded data. Confirming signals are searched for and, if present, a proper plugging process is confirmed.
  • the at least one trigger signal can also advantageously be a movement direction signal for indicating the direction of movement of an operator's hand performing a plugging process.
  • the actual position of the operator's hand is not or not necessarily queried and used as a trigger signal to trigger the opening of the measuring window, but rather the direction of movement of the hand with which the plugging process is to be carried out is monitored.
  • a connector is plugged in, at least shortly before the corresponding locking elements and locking grooves of the connector actually lock into place, essentially only a movement in the longitudinal direction, i.e. in the x direction, is carried out. This can also be used as a trigger signal to trigger the opening of the measuring window.
  • the hand movement of an operator can be queried or tracked continuously or at predeterminable time intervals.
  • Such tracking can be carried out with the aid of at least one optical device, such as a camera, and/or at least one gyroscopic device and/or at least one radio-based tracking device.
  • the hand movement of an operator can be monitored in such a time interval or time rhythm. If a corresponding position signal of the hand is output within the time interval, which serves as a tracking signal to open the measuring window, the measuring window is opened accordingly. If a corresponding sequence of movements of the operator's hand is detected, the opening of the measuring window can be triggered by this tracking signal.
  • the signals i.e.
  • the first signal and the at least one further or second signal are recorded continuously, the recorded data is only evaluated after the measuring window has been opened, so that the energy requirement is correspondingly low, especially for a mobile detection device for detecting the corresponding trigger signal.
  • the energy requirement is mainly for the Evaluation process. It is therefore possible to power a mobile recording device using rechargeable batteries that are integrated into the recording device. These can be used to work for several hours without the need to charge or replace the batteries.
  • the at least one trigger signal is a trigger signal that comes from the connector parts to be joined themselves.
  • the joining state in which the connector parts are joined and they are about to lock together can serve as a trigger signal for opening the measurement window.
  • the trigger signal can be a signal coming from the connector parts before they come into contact with one another or before they lock together, in particular a characteristic acceleration signal and/or movement profile signal.
  • the measurement window that opens when the trigger signal is present can therefore also be limited by detecting signals that come from the connector components to be joined during the plugging process shortly before locking and can be recorded, thus shortly before the characteristic signals occur.
  • the detection of the meeting of the two plug partners of the connector for their joining by, for example, pushing the plug partners into one another, i.e. a plug part and a coupling part can be done, for example, by a characteristic acceleration signal that is recorded by acceleration sensors.
  • a characteristic motion profile signal can be used, for example, by a characteristic acceleration signal that is recorded by acceleration sensors.
  • characteristic acceleration signals or motion profile signals are usually located before the locking of the two plug partners, i.e. a plug part and a coupling part of the connector, the actual plugging process, and accordingly also the signals that characterize a proper plugging process.
  • a certain motion profile signal is characteristic of the completion of the plugging process, so that this can also be used as a trigger signal to open a measurement window directed into the past.
  • At least one signal for closing the measurement window can be output.
  • a characteristic movement profile signal can be used to end the measurement window, and thus to close it.
  • the measurement window can be opened with a first trigger signal and a second trigger signal can be used to close the measurement window.
  • a fixed time period can be specified for the length or duration of the measurement window, so that the measurement window has a predetermined time length.
  • the signal for closing the measurement window if it does not have a predetermined time length, can be both time-based and event-based.
  • the second trigger signal can thus be a specific, predeterminable result or a predeterminable time or time period.
  • the time length of the measurement window can be, for example, 10 to 50 ms, in particular 12 to 50 ms.
  • the measurement window has a time length of 15 ms.
  • the measurement window for the FR 3 024 522 B1 is in the range of seconds or tenths of a second, so that the quality of the evaluation of whether a proper plugging process has taken place or not is significantly lower for the FR 3 024 522 B1 and does not appear to be sufficient for demanding applications.
  • the acoustic and/or vibration signal triggered by the locking of the first locking step can be the trigger signal for opening the measuring window.
  • Connectors with such a double locking step are known, for example, from DE 10 2013 205447 A1.
  • the first locking step is particularly suitable for triggering the trigger signal in order to open the measuring window.
  • the second locking step can also be expected to lock.
  • the characteristic signals that are monitored are therefore within the measuring window. This design measure can therefore be used as a trigger signal for opening the measuring window in a connector that has at least one double locking step.
  • the acoustic and/or vibration signal triggered by overcoming the plug-in barrier or the area with increased roughness and/or the force signal of the force to be applied to overcome the plug-in barrier can be the trigger signal for opening the measuring window.
  • a plug-in barrier can be provided that initially blocks the plugging process and must be overcome when the two plug partners, i.e. a plug part and a coupling part, are plugged into one another, whereby the plug-in barrier can be overcome by applying a defined amount of force. Accordingly, such a force signal can be used as a trigger signal for opening the measuring window.
  • an acoustic signal in the form of a noise can occur during the plugging process by pushing the plug part and coupling part, i.e. the two plug partners of the connector, into one another, and vibrations can occur on the one hand, and these can be used as a trigger signal.
  • the signals characteristic of a proper plugging process then only follow when the two plug partners, i.e. in particular the plug part and coupling part of the connector, actually lock together. These are then again within the measurement window.
  • At least one third signal in particular a third and a fourth signal
  • a first and a second detection device to be arranged on a thumb of an operator and a third detection device and a fourth detection device, which may also be provided, to be arranged on a wrist of the operator.
  • an acceleration can be measured by a first detection device, such as an acceleration sensor
  • an acoustic signal can be measured by a second detection device, such as an acoustic sensor or a microphone
  • an acoustic signal can be measured by a third detection device, such as a gyroscopic device, a position or attitude or A position change signal and an acoustic signal are detected by a fourth detection device, such as an acoustic sensor or a microphone.
  • the method can be used to check plug connections in the production assembly of products, for example in the automotive, aerospace, consumer electronics and medical technology sectors, as well as in the maintenance of systems, machines and vehicles and in medical services.
  • the method can be used, for example, in dialysis to determine whether a connection connector or plug-in connector has been correctly inserted.
  • the narrowly defined measurement window which is triggered by at least one trigger signal and either has a predetermined length of time or is closed again by a second trigger signal, it is thus possible to significantly reduce the susceptibility to errors of the method and the device for checking and evaluating the quality of plug connections compared to the state of the art. Due to the limitation of the measurement window, it is also possible to significantly reduce the computing power required for the evaluations, i.e. the computing power required to analyze the signals recorded to evaluate the presence of the signals characteristic of a proper plugging process, compared to the solutions of the state of the art, since the analysis effort in such a time-limited small measurement window or time window is less high than in an analysis that has to be carried out continuously over the entire period of the inspection.
  • the battery life of mobile or portable detection devices on the one hand for detecting the signals, and on the other hand for detecting the trigger signal, can be significantly increased compared to the solutions of the prior art, since the computationally intensive analysis of the signal characteristics of the various detected signals to determine the presence or absence of the signals characteristic of a proper plugging process within the measurement window only takes place in a short period of time.
  • the at least one detection device comprising several detection channels or the detection devices for detecting the different signals are used both to detect at least one trigger signal and to detect the signals characteristic for assessing whether a proper plugging process has taken place.
  • the source of the detected signals can be localized, for example, using differences in the propagation times of the at least two detection devices for detecting the first signal and the at least one second signal. For this purpose, these can be arranged at a predetermined fixed spatial distance from one another. This allows the signals being sought to be separated from interference signals such as background noise. In principle, it is also possible to filter the detected signals using high-pass filters and/or low-pass filters.
  • the quality of the plug connection therefore means the statement as to whether the plug connection is correct or not.
  • This result can be displayed to the operator in the area of the device or separately, visually and/or acoustically and/or haptically.
  • one or more green indicator lights can confirm a correct plug connection, while an incorrect plug connection can be displayed by a red display.
  • Figure 1 is a schematic diagram of an assembly workstation with an operator and a connector to be joined in five work steps
  • Figure 2 shows a signal-time diagram showing a trigger signal starting a measurement window according to the invention and a characteristic signal within the measurement window
  • Figure 3 shows a signal-time diagram showing a measurement window according to the invention, which is started by a trigger signal, whereby a characteristic signal only appears after a time period At has elapsed,
  • Figure 4 shows a signal-time diagram showing a trigger signal according to the invention, which only occurs after a characteristic signal, so that the measurement window for the range of the already recorded signals is opened before the trigger signal, i.e. in the past,
  • Figure 5 shows a signal-time diagram in which a trigger signal according to the invention occurs during the occurrence of a characteristic signal, so that the measurement window covers a period before the occurrence of the trigger signal and a period after the occurrence of the trigger signal, and a two-factor verification can take place,
  • Figure 6a is a schematic diagram of an operator's hand entering a target area as a trigger signal according to the invention for opening a measurement window according to the invention, wherein the operator's hand is monitored or tracked optically and/or electromagnetically and/or GPS-based by an optical and/or electromagnetic and/or other localization system or a position detection device, here indicated by two cameras, and a marking applied to the hand,
  • Figure 6b is a schematic diagram of an operator's hand emerging from a target area as a trigger signal according to the invention for closing a measurement window according to the invention, wherein the operator's hand is monitored or tracked optically and/or electromagnetically and/or GPS-based by an optical and/or electromagnetic and/or other localization system or a position detection device, here indicated by two cameras, and a marking applied to the hand,
  • Figure 7 shows an acceleration-time diagram for illustrating an acceleration profile of an operator's hand in the x, y and z directions, thus all three spatial directions, as a trigger signal according to the invention for opening a measurement window according to the invention
  • Figure 8 shows a further acceleration-time diagram to illustrate a characteristic acceleration profile of an operator's hand during a plugging process, wherein the acceleration profile is used as a trigger signal according to the invention to trigger the opening of a measuring window according to the invention and the relevant acceleration occurs exclusively in the x-direction, i.e. in the longitudinal direction of the connector, when joining the connector,
  • Figure 9 shows an angle-time diagram of 25 measurements of the movement sequence of an operator's right hand before and during a plugging process of a connector, wherein a part of the movement sequence serves as a trigger signal according to the invention for opening a measurement window according to the invention
  • Figure 10 is a diagram with an acoustic signal, thumb acceleration signal and position/movement signal recorded over time, showing three trigger signals according to the invention for opening a measuring window according to the invention with characteristic acoustic click signal, thumb acceleration signal and position/movement signal occurring within the measuring window,
  • Figure 11 a is a schematic diagram of a connector with a first and a second locking stage, wherein a locking lug is locked in the first locking stage/locking opening as a trigger signal according to the invention for opening a measuring window according to the invention
  • Figure 11 b is a schematic diagram of the connector according to Figure 11 a, wherein the locking lug is locked in the second locking position/locking opening, whereby the signals characteristic of a proper plugging process occur
  • Figure 12a is a flow chart of a process for checking and evaluating the quality of a plug connection according to the state of the art
  • Figure 12b is a flow chart of a process or method according to the invention for checking and evaluating the quality of a plug connection of a connector that emits characteristic signals during a plugging process that are characteristic of a proper plugging process, and
  • Figure 13 is a schematic diagram of two hands of an operator performing a plugging operation, wherein one of the two hands of the operator is provided with a mobile device according to the invention for checking and evaluating the quality of a plug connection of a connector.
  • Figure 1 shows an example of a workflow for joining a connector 100, comprising a plug part 101 and a coupling part 102, at an assembly workstation 103 in five steps I to V.
  • An operator 110 or a worker who carries out the assembly, thus joining the connector 100 or its plug part 101 and coupling part 102, is located at the assembly workstation.
  • a first step I in the example shown in Figure 1, an assembly 105, which comprises the plug part 101 and the coupling part 102, is moved to the assembly workstation 103, where the operator 110 is located. This is indicated by an arrow P1 in Figure 1.
  • the assembly workstation 103 can also be moved towards the operator 110 from the front or from above or in any other direction, or the operator 110 moves towards the respective fixed assembly workstation 103, e.g. in the case of fixed manual assembly stations where the operator 110 or the worker sits and the assemblies 105 are distributed using a so-called milk run.
  • the movements of the operator 110 and the assembly workstation 103 in steps II and V described below are correspondingly different or adapted in the above-mentioned alternatives to the example shown in Figure 1.
  • a second step II shown as an example in Figure 1
  • the operator 110 approaches the assembly workstation 103 and thus the assembly 105 with the plug part 101 and the coupling part 102. This is indicated in Figure 1 by an arrow P2.
  • a third step III the operator 110 grasps the plug part 101 with his right hand 112 and the coupling part 102 with his left hand 111.
  • the operator 110 grasp either the plug part 101 or the coupling part 102 with only one of his two hands 111, 112.
  • the movement of at least one of the two hands 111, 112 of the operator 110 is detected by a detection device 17.
  • the characteristic movement of at least one of the two hands 111, 112 in the direction of the plug part 101 or the coupling part 102 is used as a trigger signal to open a measurement window 20 (see Figures 2 to 5).
  • a detection device 10 is provided for detecting the trigger signal in the form of the characteristic movement of at least one of the two hands 111, 112 of the operator 110, and a device 11 for opening the measuring window based on the presence of the trigger signal is provided for opening the measuring window.
  • a characteristic acoustic click signal is emitted, which is indicated by a lightning arrow 103 in Figure 1. This is detected by a detection device 12 for detecting signals, such as acoustic signals, among others. This characteristic acoustic click signal lies within the open measuring window.
  • a fifth and final step V in Figure 1 in the example shown here, the fully assembled component with the fully assembled connector 100 leaves the assembly workstation 103 and the operator 110 moves away from the assembly workstation 103. Both are indicated by a respective arrow P4 or P5 in Figure 1.
  • the movements of the operator 110 are also or the assembly workstation 103 may be different from that shown in Figure 1.
  • Both events i.e. both the operator 110 leaving the assembly workstation 103 (arrow P5) and the removal of the fully assembled component with the fully assembled connector 100 (arrow P4) lead to the output of a second trigger signal, which is detected by a further detection device 13 to detect this corresponding trigger signal.
  • the measurement window is closed after this second trigger signal is present.
  • one detection device or sensor with a corresponding number of detection channels or sensor channels can also be provided.
  • a recording device 14 can record the acoustic and movement signals recorded by the detection device 12, so that the characteristic acoustic click signal and a movement signal characteristic of a proper plugging process are also recorded in these recorded signals.
  • An evaluation unit 15 can evaluate whether or not the characteristic acoustic click signal and the characteristic movement signal are present in the measuring window. If the operator 110 has properly joined the plug part 101 and the coupling part 102, the characteristic acoustic click signal, identified in Figure 1 by the lightning arrow P3, and the characteristic movement signal occur within the measuring window, so that if both signals are present, the evaluation unit 15 can determine that the plug connection is proper and can display this to the operator 110 via a display device 16.
  • the display device can be an optical and/or acoustic display device, for example a green and a red optical display to illustrate a correct, complete plug connection (green light) or an incorrect plug connection (red light).
  • a display can be made, for example, on a display in an assembly hall or at a production site in which the plugging processes are carried out, or on a dashboard on a tablet PC and/or at an external location, such as at an operator of the mobile device 1. All devices 10, 11, 12, 13, 17 and optionally also 14, 15 and 16 can be arranged in a mobile device which can be worn, for example, on the arm or wrist or a hand, such as a thumb, of the operator 110. This is indicated in Figure 13.
  • Such a mobile device 1 for monitoring and evaluating the assembly quality of a connector 100 is shown arranged on the two hands 111, 112 of the operator during the plugging process of the connector 100.
  • the connector 100 comprises the plug part 101 and the coupling part 102, wherein the operator holds the plug part 101 partly in their right hand 112 and partly in their left hand 111 and the coupling part 102 in their left hand 111.
  • the mobile device 1 comprises a thumb or finger unit 2 and a wrist unit 3. Both are arranged on the right hand 112 of the operator.
  • the thumb or finger unit 2 is provided with a connecting device 4, which serves to fasten the thumb or finger unit 2 to the thumb 120 of the right hand 112 of the operator.
  • the connecting device 4 is designed here, for example, to be ring-shaped or clasp-like and can be clamped to the thumb 120 of the operator in the manner of a clasp.
  • the wrist unit 3 is also provided with a connecting device 5. This is designed here, for example, in the manner of a bracelet, so that it can be worn on the wrist 121 of the right hand 112 of the operator.
  • the thumb or finger unit 2 is arranged intermedially on the thumb 120, i.e. between the two thumb joints 122, 123 of the thumb 120. However, it can also be arranged proximally, i.e. in the area of the second thumb joint 123 of the thumb 120, which is closer to the wrist 121, possibly in the area of the metacarpal bone 124 of the thumb 120, whereby it is ensured that the mobility of the thumb 120 is still ensured. In Figure 13, the further possible proximal positioning of the thumb or finger unit 2 is indicated by dashed lines. Furthermore, the The thumb or finger unit 2 can also be arranged intermedially, proximally or distally, in particular on the index finger 125, for example on the right hand 112 of the operator.
  • Both the thumb or finger unit 2 and the wrist unit 3 contain sensors or the detection devices already mentioned above for Figure 1 for detecting at least two signals that can be used as a basis for evaluating the quality of a plug connection of the connector 100 and that also detect, among other things, the at least one trigger signal.
  • the detection devices or sensors can be an acceleration sensor for detecting acceleration signals, at least one acoustic sensor or at least one microphone for detecting acoustic signals and at least one gyroscopic detection device for detecting position and movement signals.
  • the thumb or finger unit 2 comprises an acceleration sensor and an acoustic sensor or a microphone.
  • the wrist unit 3 comprises a gyroscopic detection device and an acoustic sensor or a microphone.
  • the wrist unit 3 may comprise, in addition to the acoustic sensor or a microphone, an acceleration sensor and/or a pressure sensor and/or a sensor for detecting rotational movements and/or a pressure sensor and/or a temperature sensor and/or an RFID sensor and/or an optical marker, which, however, are not shown in Figure 13.
  • only one sensor or detection device comprising several sensor channels for detecting different signals can be provided.
  • the trigger signal ST for opening the measurement window 20 occurs at time to; after the time period At has elapsed, the measurement window 20 closes again at time ti.
  • the trigger signal S T is indicated in Figure 2 with dotted lines.
  • the characteristic acoustic click signal S K occurs within the measurement window 20, i.e. within the time period At. Since the time to for opening the measurement window 20 occurs before the occurrence of the characteristic acoustic click signal S K , it can also be referred to as a pre-trigger signal.
  • the trigger signal ST for opening the measurement window 20 also occurs before the characteristic acoustic click signal S K. It can therefore also be referred to as a pre-trigger signal here.
  • the characteristic acoustic click signal S K in Figure 3 only occurs after the time period At has elapsed, thus after the second time ti.
  • the measurement window 20 is therefore longer in time than in the embodiment according to Figure 2.
  • the measurement window 20 is opened in the past. If the trigger signal ST is present at the time t0, the characteristic acoustic click signal S K has already occurred in time, so that the acoustic data recorded by the recording device 14 and recorded by the detection device 12 in Figure 1 are looked at in the past.
  • the characteristic acoustic click signal S K is within the measurement window 20, which is closed again at the time t1, so that the evaluation unit 15 (see Figure 1) can also determine the presence of a proper plug connection in the embodiment according to Figure 4. Since the time t0 for opening the measurement window 20 is after the occurrence of the characteristic acoustic click signal S K , this trigger signal S T in the embodiment according to Figure 4, this is referred to as the post-trigger signal. In Figure 4, this is also shown by dotted lines.
  • the trigger signal S T occurs at the same time as the characteristic acoustic click signal S K occurs.
  • the evaluation unit 15 can rule out, by the presence of the trigger signal ST during the occurrence of the characteristic acoustic click signal S K , that an event other than the locking of the plug part 101 and coupling part 102 shows a similar signal characteristic to the characteristic acoustic click signal SK.
  • the trigger signal S T therefore occurs within the same time period as the characteristic acoustic click signal S K.
  • the occurrence of the trigger signal S T and the characteristic acoustic click signal S K within the same time period can result in mutual verification of both signals.
  • the quality of the prediction with regard to the presence of a proper plug connection can be increased in this way.
  • the evaluation is based not only on one signal curve, but on more than one, so that several trigger signals S T can open and possibly close the measuring window 20 and the presence of two different characteristic signals within the measuring window 20 is monitored, such as the characteristic acoustic click signal S K and a characteristic movement signal or a characteristic position or movement sequence signal or position or position change signal of one or both hands 111, 112 of the operator 110.
  • the measurement window is opened both in the past and in the future, so that it extends in time between the time ti and the time ti.
  • Figures 6a and 6b show a variant in which movement data of the right hand 112 of the operator 110 (see Figure 1 or 13) is used as one of the trigger signals ST for opening the measurement window 20 and also as a trigger signal for closing the measurement window 20.
  • Geo-fencing can be used, for example, to determine the position of the right hand 112 of the operator 110 in order to open the measurement window 20 and also to close it again.
  • a white marking 113 is arranged on the right hand 112 of the operator 110, which is tracked by two optical and/or electromagnetic and/or other localization systems or position detection devices 114, 115, which are indicated here by two cameras. Tracking the movement of the right hand 112 of the operator 110 is therefore not only possible optically, for example using two cameras, but also electromagnetically using so-called real-time location systems based on RFID and/or GPS.
  • the marking 113 can therefore be an optical point or another type of label, such as an RFID tag.
  • a target area 116 is also determined. The movement of the right hand 112 or the marking 113 arranged on it is monitored in relation to the target area 116.
  • the right hand 112 enters the target area 116 ( Figure 6a), this is used as a trigger signal ST to open the measurement window 20 (see Figures 2 to 5). Leaving the target area 116 ( Figure 6b) is used as a trigger signal to close the measurement window.
  • the entry of the hand 112 into the target area 116 is indicated by an arrow P6, the exit of the hand 112 from the target area 116 by an arrow P7.
  • the presence of the trigger signal ST in the form of the movement data of the marking 113 on the right hand 112 of the operator 110 is detected at time t 0.
  • the movement of the right hand 112 of the operator or of the marking 113 applied to it is continuously monitored or tracked via the two cameras 114, 115.
  • the exit of the marking 113 or the right hand 112 of the operator from the target area 116 at time t 1 is also detected via the two position detection devices 114, 115.
  • the target area 116 is the area in which the joining of the connector 100, i.e. of its plug part 101 and coupling part 102, is to take place.
  • the measuring window 20 is opened and at time ti (see Figure 6b) the measuring window 20 is closed again (see e.g. Figure 2).
  • the two position detection devices 114, 115 are thus the detection device 10 for detecting the movement data and thus also the trigger signal for triggering the opening of the measuring window 20 and also for triggering the closing of the latter.
  • the acceleration profile of the respective right hand 112 of an operator 110 is recorded in a respective acceleration-time diagram.
  • the acceleration profile is recorded in the x, y and z directions, with the respective accelerations in the x, y and z directions being shown.
  • a free movement of the right hand 112 takes place in all three spatial directions
  • Figure 8 it can be seen that in a time period At, which is outlined in Figure 8 by a box 21, only an acceleration of the right hand 112 takes place in the x direction.
  • the acoustic click signal characteristic of this occurs, although this is not shown in Figure 8.
  • the characteristic acceleration of the right hand 112 only in the x direction for the time period ⁇ t, which lies in the box 21, is thus used as a trigger signal ST to open the measuring window 20.
  • Figure 9 shows a recorded example of the movement profile of the right hand 112 of the operator 110, comprising 25 measurements, before and during a plugging or assembly/joining process of the connector 100 (see Figure 1).
  • the movement signals can be recorded by a gyroscopic device.
  • the occurrence of this characteristic sequence of movements signal can be a corresponding trigger signal ST for opening the measurement window 20 in which the occurrence of the characteristic signals, here e.g. a characteristic acoustic click signal and a characteristic movement signal or position signal, is expected.
  • the characteristic signals here e.g. a characteristic acoustic click signal and a characteristic movement signal or position signal
  • the acoustic signal S A is shown over time in the upper part of the diagram.
  • a thumb acceleration signal S B of the thumb of the operator's right hand is shown, recorded by an acceleration sensor on the operator's thumb, with the acceleration sensor tracking the high-frequency acceleration signal, and in the lower part of the diagram, a position or movement signal SG is shown, which is recorded by a gyroscopic device, which tracks the rough hand movement of the operator's hand.
  • the opening of the measurement window 20 is triggered by the presence of the trigger signal ST, which is delimited by a dashed box in the diagram in Figure 10.
  • This trigger signal S T is a predetermined acceleration profile of the thumb of the operator's right hand on the one hand, and a predetermined position or location/position change or movement signal of the plug part and coupling part of the connector 100 and a predetermined acoustic signal profile on the other. It is apparent that a quiet acoustic signal also occurs at the time the trigger signal S T occurs. All three detected signals or at least the thumb acceleration signal S B and the position or movement signal SG are the trigger signals that trigger the opening of the measuring window 20.
  • the next expected occurrence is the characteristic acoustic click signal SK and the characteristic acceleration signal S B c of the thumb of the operator's right hand and/or the characteristic movement signal SGC. These occur in Figure 10 within the second dashed box. It can be seen here that not only the acceleration curve SBC that is sought and characteristic of a correct plugging process occurs during the joining process of the connector, but also the characteristic acoustic click signal S K that is sought, which can be recognized in the acoustic signal curve in the upper part of the diagram.
  • the connector 100 here is an electrical connector.
  • FIG. 10 makes it clear that in a preferred configuration, three signals are used for the trigger signal, here implemented as a pre-trigger, as well as evaluation signals for assessing the quality of the plugging process. This represents a very clear difference to the state of the art.
  • an acceleration sensor with a comparatively high sampling rate, e.g. in the range of 44.1 kHz, which is suitable for the analysis of (body) sound signals, and a gyroscopic detection device on the wrist of the operator 110, which supplies movement data of the hand (low frequency), can be provided.
  • the acceleration sensor is used to determine an acceleration and a speed, whereby the acceleration sensor evaluates the vibration which is triggered, for example, by a locking lug 106 on a plug part 101 (see Figures 11 a, 11 b).
  • the gyroscopic detection device determines the position or changes in position of the hand of the operator 110, whereby it only provides the information as to whether the hand is in the correct position and, if necessary roughly, has performed the correct movement.
  • Figures 11 a and 11 b show a connector 100 provided with two locking steps.
  • the additional locking step can generate a clearer pre-trigger signal.
  • the locking lug 106 of the plug part 101 engages in a first locking opening 107 of the coupling part 102, the plug part 101 is thus still incompletely inserted into the coupling part 102.
  • the locking lug 106 of the plug part 101 engages in a second locking opening 108. of the coupling part 102.
  • Plug part 101 and coupling part 102 are completely joined.
  • the interlocking of the components, i.e. plug part 101 and coupling part 102 can thus be detected without any special additional measures and the corresponding signal can be used as one of the signals used to assess the quality of the plug connection.
  • the locking of the locking lug 106 in the first locking opening 107 of the coupling part 102 can thus be used as a trigger signal for opening the measuring window 20, since the correct locking of the locking lug 106 in the second locking opening 108 of the coupling part 102 can be expected next, thus the occurrence of the characteristic acoustic click signal SK and the characteristic acceleration signal SBC or the characteristic movement sequence signal SGC.
  • the measuring window 20 can accordingly be closed again after a predeterminable period of time after the occurrence of the characteristic signals when the locking lug 106 locks in the second locking opening 108, or the measuring window 20 has a predetermined period of time or length of time, so that it closes again automatically after this period of time has elapsed.
  • the trigger signal is thus triggered by the component itself, i.e. by design measures provided in the connector 100 itself, i.e. the locking of the locking lug 106 in the first locking opening 107 of the coupling part 102.
  • Figure 12a shows the sequence of a method for checking and evaluating the quality of a plug connection of the prior art.
  • acoustic data is recorded and stored, and in a second step 201 the characteristic acoustic click signal is searched for in this recorded and stored data. If this is not detected, the query loops again (see back arrow from 201 to 200). If the characteristic acoustic click signal was detected, a confirmation of a proper plug connection can be issued in a third step 202.
  • Figure 12b shows an inventive process for checking and evaluating the quality of a plug connection.
  • acoustic signals, acceleration signals and/or position/location or movement/position change signals are continuously recorded and saved.
  • the saved signals are filtered in order to filter out, for example, speech signals that are not the desired acoustic click signal, as well as periodically occurring and non-transient noise.
  • an attempt is made to detect at least one trigger signal that triggers the opening of the measurement window 20. If this is not detected, further data recording and storage and filtering of the signals takes place until the desired at least one trigger signal (see back arrow from 207 to 205) is actually detected.
  • the measurement window 20 is opened in the fourth step 208.
  • the characteristic acoustic click signal and the characteristic acceleration signal and/or the characteristic acoustic click signal and the characteristic movement signal are searched for within the measurement window 20. If these are not present or are not present properly, an improper plugging process or connection is indicated, for example by a red light. This is indicated by box 210. If, however, the characteristic signals are present, and are thus detected, the information is output that a proper plug connection is present, which is indicated in Figure 12b by box 211.
  • the method according to the invention thus makes it possible to determine a more precise detection of the presence of a proper plugging process by providing a small and time-limited measuring window.
  • significantly less electrical energy is required because, although various signals are continuously recorded, they are only evaluated within the narrow/short measuring window, which consumes significantly less energy.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)

Abstract

L'invention concerne un procédé de vérification et d'évaluation de la qualité d'une connexion enfichable d'un connecteur mâle (100), dans lequel un premier signal est acquis et évalué. Dans le procédé, le premier signal (SA) est acquis en continu par un premier dispositif d'acquisition (12) et au moins un second signal (SB, SQ) est acquis en continu par au moins un second dispositif d'acquisition (17, 114, 115) et enregistré dans au moins un dispositif d'enregistrement (14), au moins un signal de déclenchement (ST) déclenche l'ouverture d'une fenêtre de mesure (20), et la présence d'au moins deux signaux (SK, SBC, SQC) qui sont caractéristiques d'un processus de branchement correct est vérifiée par au moins une unité d'évaluation (15) à l'intérieur de la fenêtre de mesure (20), le ou les signaux de déclenchement (ST) étant présents temporellement avant la fenêtre de mesure (20), à l'intérieur de la fenêtre de mesure (20) ou temporellement après la fenêtre de mesure (20).
PCT/EP2024/025181 2023-06-22 2024-06-05 Procédé et dispositif de vérification et d'évaluation de la qualité d'une connexion enfichable Pending WO2024260578A1 (fr)

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DE102023116344.2A DE102023116344A1 (de) 2023-06-22 2023-06-22 Verfahren und Vorrichtung zum Kontrollieren und Bewerten der Güte einer Steckverbindung

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DE102024113855A1 (de) * 2024-05-17 2025-11-20 Bayerische Motoren Werke Aktiengesellschaft Verfahren zum Überprüfen einer Schnappverbindung und System zum Überprüfen einer Schnappverbindung

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WO2013131632A1 (fr) 2012-03-05 2013-09-12 Voss Automotive Gmbh Système de contrôle et procédé de contrôle du montage d'un dispositif de couplage
DE102013205447A1 (de) 2013-03-27 2014-10-02 Lisa Dräxlmaier GmbH Elektrischer Steckverbinder sowie elektrische Steckverbindung mit einem solchen Steckverbinder
WO2015053936A1 (fr) 2013-10-07 2015-04-16 Tyco Electronics Corporation Procédé et système d'assurance de couplage de connecteur
WO2016070984A1 (fr) 2014-11-04 2016-05-12 A. Raymond Et Cie. Scs Dispositif et procédé pour surveiller un montage de deux composants à assembler au moyen d'une fixation par enclenchement
FR3024522B1 (fr) 2014-07-30 2017-03-17 Hutchinson Systeme et procede de detection du verrouillage d'une connexion manuelle d'un raccord rapide encliquetable.
WO2017062124A1 (fr) 2015-10-07 2017-04-13 Te Connectivity Corporation Système et procédé d'assurance d'accouplement de connecteurs
WO2017062122A1 (fr) 2015-10-07 2017-04-13 Te Connectivity Corporation Procédé et système d'assurance de couplage de connecteur
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US20100242599A1 (en) * 2007-05-24 2010-09-30 Tatsuya Ogawa Device, system, and method for determining fitting condition of connector
WO2013131632A1 (fr) 2012-03-05 2013-09-12 Voss Automotive Gmbh Système de contrôle et procédé de contrôle du montage d'un dispositif de couplage
DE102013205447A1 (de) 2013-03-27 2014-10-02 Lisa Dräxlmaier GmbH Elektrischer Steckverbinder sowie elektrische Steckverbindung mit einem solchen Steckverbinder
WO2015053936A1 (fr) 2013-10-07 2015-04-16 Tyco Electronics Corporation Procédé et système d'assurance de couplage de connecteur
FR3024522B1 (fr) 2014-07-30 2017-03-17 Hutchinson Systeme et procede de detection du verrouillage d'une connexion manuelle d'un raccord rapide encliquetable.
WO2016070984A1 (fr) 2014-11-04 2016-05-12 A. Raymond Et Cie. Scs Dispositif et procédé pour surveiller un montage de deux composants à assembler au moyen d'une fixation par enclenchement
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WO2017062122A1 (fr) 2015-10-07 2017-04-13 Te Connectivity Corporation Procédé et système d'assurance de couplage de connecteur
WO2022146260A1 (fr) * 2020-12-31 2022-07-07 Koc Universitesi Dispositif de détection et procédé d'évaluation d'état de verrouillage de connecteur

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