KR102703599B1 - Scaffolded detection system - Google Patents

Abstract

The present specification discloses a stepping-type detection system. The stepping-type detection system according to the present specification includes a sensing unit including at least one sensor module and a control unit for processing a signal sensed from the sensing unit, wherein the sensor module includes a case lower plate including a concave portion, a sensor disposed on the concave portion, a first positive portion disposed on the sensor, and a case upper plate disposed on the first positive portion. According to the stepping-type detection system according to the present specification, a situation in which a passenger is trapped at one end of a platform can be prevented due to an improvement in detection rate, and thus the safety of the passenger can be ensured.

Description

{SCAFFOLDED DETECTION SYSTEM}

This specification relates to a foothold type detection system.

Platform Screen Doors (PSD) installed on subway platforms are facilities for improving passenger safety and the platform environment by blocking the platform and the tracks on which the trains move. Screen doors are usually formed by installing fixed walls on the platform podium and connecting automatic doors to these fixed walls so that they open and close automatically.

The automatic door of the screen door is linked to the train door and automatically opens and closes at the same time as the train door. The movable door opens only when the train door opens to enable passengers to get on and off, and in other situations, it remains closed to prevent passengers from falling or coming into contact with the train.

In principle, no facility can be installed on the platform between the screen door and the train. Therefore, an empty space with a certain width (for example, 400 mm) or more may be created on the platform between the screen door and the train. If a person is trapped in this platform, a very dangerous situation may occur. In other words, if the train door and screen door close while the passenger is not able to pass through the screen door and board the train, the passenger will be trapped between them. As a result, a dangerous accident may occur where the passenger is located between the closed screen door and the closed train door.

To prevent such problems, a technology has been developed to install infrared sensors or image sensors on screen doors to detect the movement of users and open and close the screen doors accordingly. However, these sensors can often malfunction due to the influence of external environments such as smartphone lights, indoor lighting, and dust.

Therefore, a system is required that can prevent the screen door from closing when an object or person is detected on the platform between the screen door and the train even though the train door is closed.

The present specification aims to solve the aforementioned needs and/or problems in the prior art.

The tasks of this specification are not limited to those mentioned above, and other tasks not mentioned will be clearly understood by those skilled in the art from the description below.

A foothold-type detection system according to the present specification includes a sensing unit including at least one sensor module and a control unit that processes a signal sensed from the sensing unit, wherein the sensor module may include a case lower plate including a concave portion, a sensor disposed on the concave portion, a first relief portion disposed on the sensor, and a case upper plate disposed on the first relief portion.

In one embodiment, the case top plate may include a second raised portion protruding in the direction in which the sensor is arranged.

In one embodiment, the first relief portion may have a shape corresponding to the shape of the sensor.

In one embodiment, the sensor module may include a first adhesive layer disposed between the first relief portion and the sensor, and a second adhesive layer disposed between the case lower plate and the case upper plate.

In one embodiment, the sensor includes a load-sensitive region and a load-non-sensitive region including a first pattern and a second pattern, wherein the first pattern includes a first protrusion protruding in a direction in which the second pattern is arranged, and the second pattern includes a second protrusion protruding in a direction in which the first pattern is arranged.

In one embodiment, the sensor includes a first output terminal for outputting a signal detected from the first pattern and a second output terminal for outputting a signal detected from the second pattern, and the first protrusion and the second protrusion can be arranged to intersect each other in the direction in which the first output terminal and the second output terminal are arranged.

In one embodiment, the sensor may include an upper film disposed over the first pattern and the second pattern, a conductive film disposed under the first pattern and the second pattern, and a lower film disposed under the conductive film.

In one embodiment, the first protrusion may include a first pillar protruding in the direction in which the conductive film is arranged, and the second protrusion may include a second pillar protruding in the direction in which the conductive film is arranged.

In one embodiment, the sensor module may include a first adhesive layer disposed between the load sensing area of the sensor and the first relief portion.

In one embodiment, the first relief portion may include polyurethane (PU).

According to this specification, the improved detection rate can prevent a situation in which a passenger is trapped in one part of a platform, thereby ensuring passenger safety.

According to the present specification, the detection rate of a signal detected by a detection system can be improved.

According to this specification, power consumption of a detection system can be reduced.

Figure 1 is a drawing showing a situation in which a passenger may become trapped on the platform between the platform screen door and the train car.
Figure 2 is a drawing showing a platform and a sensing unit.
FIG. 3 is a block diagram illustrating a foothold detection system according to one embodiment of the present specification.
FIG. 4 is a block diagram illustrating a foothold detection system according to another embodiment of the present specification.
Figure 5 is a diagram showing the non-load section and the periodic load section divided into daily periods.
Figure 6 is a drawing for explaining the non-load section and the periodic load section on the time axis.
FIG. 7 is a plan view showing a sensing unit according to one embodiment of the present specification.
FIG. 8 is a plan view showing a sensing unit according to another embodiment of the present specification.
FIG. 9 is a perspective view showing a sensor module according to one embodiment of the present specification.
FIG. 10 is a cross-sectional view showing a sensor module according to one embodiment of the present specification.
FIG. 11 is a plan view illustrating a sensor according to one embodiment of the present specification.
Figures 12 and 13 are cross-sectional views showing a sensor according to one embodiment of the present specification.
FIG. 14 is a cross-sectional view for explaining the operating principle of a sensor according to one embodiment of the present specification.
FIG. 15 is a plan view showing a case top plate according to one embodiment of the present specification.
Figure 16 is a simulation table showing the sensitivity of the sensor depending on the presence or absence of a relief.

The advantages and features of the invention disclosed in this specification, and the methods for achieving them, will become clear with reference to the embodiments described below in detail together with the accompanying drawings. The scope of the invention according to this specification is not limited to the embodiments disclosed below, but may be implemented in various different forms, and the embodiments are only for the complete disclosure of the invention according to this specification. This specification is provided to fully inform a person having ordinary skill in the art to which the invention according to this specification belongs of the scope of the invention according to this specification, and the scope of the invention according to this specification is defined only by the scope of the claims.

In describing the invention according to this specification, if it is determined that a detailed description of a related known technology may unnecessarily obscure the gist of this specification, the detailed description is omitted.

When the terms “comprising,” “may include,” “have,” and “consist of” are used in this specification, other parts may be added unless “only” is used. When a component is expressed in the singular, it can be interpreted as plural unless there is a special explicit statement.

When the positional relationship and interconnected relationship between two components are described as “on top of,” “above,” “below,” “next to,” “connect, couple,” crossing, intersecting, etc., one or more other components may be interposed between those components unless there is a mention of “right away” or “directly.”

When the temporal order is explained with phrases such as 'after', 'following', 'next to', or 'before', it may not be continuous on the time axis unless 'right away' or 'directly' is used.

Although the terms 1st, 2nd, etc. may be used to distinguish components, the function or structure of these components is not limited by the ordinal number or component name attached to the front of the component.

Here, X and Y are assumed to be objects (e.g., devices, components, circuits, wiring, electrodes, terminals, conductive films, layers, etc.).

An example of a case where "X and Y are directly connected" is a case where no element (e.g., a switch, a transistor, a capacitive element, an inductor, a resistor, a diode, a display element, a light-emitting element, a load, etc.) that enables an electrical connection between X and Y is connected between X and Y. Or, X and Y are connected without intervening any element (e.g., a switch, a transistor, a capacitive element, an inductor, a resistor, a diode, a display element, a light-emitting element, a load, etc.) that enables an electrical connection between X and Y.

As an example of a case where "X and Y are electrically connected", it is possible for one or more elements (e.g., a switch, a transistor, a capacitive element, an inductor, a resistor element, a diode, a display element, a light-emitting element, a load, etc.) that enable electrical connection between X and Y to be connected between X and Y. In addition, the switch has a function of being controlled to be on/off. The switch has a function of controlling whether to flow current by becoming a turn-on state or a turn-off state. Alternatively, the switch has a function of selecting and switching a path for flowing current. In addition, the case where X and Y are electrically connected includes a case where X and Y are directly connected.

As an example of a case where X and Y are functionally connected, it is possible for one or more circuits that enable the functional connection of X and Y (for example, a logic circuit (inverter, NAND circuit, NOR circuit, etc.), a signal conversion circuit (D/A conversion circuit, A/D conversion circuit, gamma correction circuit, etc.), a potential level conversion circuit (a power supply circuit (boost circuit, step-down circuit, etc.), a level shifter circuit that changes the potential level of a signal, etc.), a voltage source, a current source, a switching circuit, an amplifier circuit (a circuit that can increase the signal amplitude or current amount, an operational amplifier, a differential amplifier circuit, a source follower circuit, a buffer circuit, etc., a signal generation circuit, a memory circuit, a control circuit, etc.) to be connected between X and Y. In addition, as an example, even if another circuit is inserted between X and Y, if a signal output from X is transmitted to Y, X and Y are considered to be functionally connected. In addition, in a case where X and Y are functionally connected, there is a case where X and Y are directly connected and a case where X and Y are electrically connected. If there is, it falls into that category.

When it is explicitly described in this specification or the like that X and Y are electrically connected, it is deemed that the cases where X and Y are electrically connected (i.e. X and Y are connected with another component or circuit therebetween), the cases where X and Y are functionally connected (i.e. X and Y are functionally connected with another circuit therebetween), and the cases where X and Y are directly connected (i.e. X and Y are connected without another component or circuit therebetween).

In cases where there is an explicit description in this specification or the like that it is “electrically connected,” the same content is disclosed in this specification or the like as in cases where there is an explicit description that it is simply “connected.”

In this specification and elsewhere, the terms "film" and "layer" may be described as having substantially the same meaning depending on the situation. For example, there are cases where the term "conductive layer" may be replaced with the term "conductive film." Or, for example, there are cases where the term "insulating film" may be replaced with the term "insulating layer."

In general, potential (voltage) is relative, and its size is determined by its relative size to the reference potential. Even when there is a description such as "ground", "GND", or "ground", the potential is not necessarily limited to 0 V. For example, "ground" or "GND" is sometimes defined based on the lowest potential in the circuit. Or, "ground" or "GND" is sometimes defined based on the intermediate potential in the circuit. In that case, positive and negative potentials are specified based on that potential.

The following embodiments may be partially or wholly combined or combined with each other, and may be technically capable of various interconnections and operations. Each embodiment may be implemented independently of each other, or may be implemented together in a related relationship.

Terms (including technical and scientific terms) used in the embodiments of this specification, unless explicitly and specifically defined and described, can be interpreted as having a meaning that can be generally understood by a person of ordinary skill in the technical field to which the invention of this specification belongs, and terms that are commonly used, such as terms defined in a dictionary, can be interpreted in consideration of the contextual meaning of the relevant technology.

Hereinafter, embodiments of the present specification will be described in detail with reference to the attached drawings.

Figure 1 is a drawing showing a situation in which a passenger may become trapped on the platform between the platform screen door and the train car.

Referring to Fig. 1, a passenger (P) on a platform can pass through one end (E) of the platform to board a train (V) when the screen door (D) is open. As described above, since the opening and closing of the screen door (D) is linked to the door of the train, if a passenger (P) passing through one end (E) fails to board the train (V), he or she may be trapped between the screen door (D) and the train (V) by the screen door (D) that may close automatically.

Since the passenger (P) steps on the end portion (E) while passing through the end portion (E), a load can be detected at the end portion (E), and if the opening and closing of the screen door (D) is controlled based on the detected load, the passenger (P) may not be trapped at the end portion (E), and thus the safety of the passenger (P) can be ensured. Therefore, the step-type detection system according to the present specification may include a sensing unit that detects a load, and the sensing unit may be arranged at the end portion (E).

Figure 2 is a drawing showing a platform and a sensing unit.

Referring to FIG. 2, the screen door (D) may include first to fourth doors (D1 to D4). The first door (D1) and the second door (D2) may actually move to create a space for passengers to pass through when the train arrives at the platform. The third door (D3) and the fourth door (D4) may be installed for the purpose of providing a frame for the first door (D1) and the second door (D2) to move when they respectively move, adjusting the gap between the plurality of train doors, and blocking a passage with the track section so that passengers cannot go to a space other than the doors that move, such as the first door (D1) and the second door (D2).

For example, when an electric train arrives at a platform and the doors open, the first door (D1) can be moved in parallel with the direction in which the third door (D3) is arranged so as to overlap with the third door (D3). The second door (D2) can be moved in parallel with the direction in which the fourth door (D4) is arranged so as to overlap with the fourth door (D4).

A passenger can enter an electric train through an empty space created by the movement of the first door (D1) and the second door (D2). In this process, the passenger can pass through one end (E) of the platform. The passenger can pass through a portion of the portion (E) that overlaps the open first and second doors (D1, D2). Accordingly, a load can be detected at the overlapping portion (100). Since the detection of the passenger's load means that the passenger is trying to board the electric train through the door, there may be cases where the passenger is unable to board the electric train. At this time, the first and second doors (D1, D2) should be kept open (open) while the load is detected so that the screen door (D1, D2) does not close.

In a step-type detection system according to one embodiment of the present specification, a sensing unit (100) must detect the load of a specific object, and may be placed at an end portion (E) that overlaps with the first and second doors (D1, D2) that open to overlap with the doors of an electric train when the electric train arrives at the track. The step-type detection system according to the present specification can prevent a situation in which a passenger is trapped at an end portion (E) by maintaining the first and second doors (D1, D2) in an open state when a load is detected by the sensing unit (100), and thus the safety of the passenger can be ensured.

FIG. 3 is a block diagram showing a foothold-type detection system according to one embodiment of the present specification. FIG. 4 is a block diagram showing a foothold-type detection system according to another embodiment of the present specification.

Referring to FIGS. 3 and 4, a foothold-type detection system according to one embodiment of the present specification may include a sensing unit (100) and a control unit (200). The foothold-type detection system may further include an external system (300).

The sensing unit (100) may include at least one sensor module (110A). In a preferred embodiment, the sensing unit (100) may include at least two or more first sensor modules (110A) and second sensor modules (110B). By including a plurality of sensor modules (110A, 110B), when one of the sensor modules breaks down, it may be easily replaced. In addition, there is an advantage in that the load detection area (Active Area) may be expanded. More preferably, the sensing unit (100) may include a first sensor module (110A), a second sensor module (110B), and a third sensor module (110C).

The number of sensor modules can be determined by considering the size of the section where the sensing unit (100) is to be placed, the size of the door that opens when the electric train arrives, etc.

The first sensor module (110A) may include a first output terminal (111A) and a second output terminal (112A). The second sensor module (110B) may include a first output terminal (111B) and a second output terminal (112B). The third sensor module (110C) may include a first output terminal (111C) and a second output terminal (112C). Each of the sensor modules (110A, 110B, 110C) may output a positive (+) and a negative (-) signal from a sensed analog signal. The first output terminal (111A, 111B, 111C) may output a positive (+) signal transmitted from each of the sensor modules (110A, 110B, 110C). The second output terminal (112A, 112B, 112C) can output a negative (-) signal transmitted from each sensor module (110A, 110B, 110C).

Positive (+) and negative (-) signals transmitted from sensor modules (110A, 110B, 110C) can be input in series or in parallel to the signal input unit (211). The first output terminal (111A, 111B, 111C) and the second output terminal (112A, 112B, 112C) can be electrically connected to the signal input unit (211).

Referring to FIG. 3, the control unit (200) may include a first signal input unit (211A), a second signal input unit (211B), and a third signal input unit (211C). Signals output from the first and second output terminals (111A, 112A) of the first sensor module (110A) may be input to the first signal input unit (211A), signals output from the first and second output terminals (111B, 112B) of the second sensor module (110B) may be input to the second signal input unit (211B), and signals output from the first and second output terminals (111C, 112C) of the third sensor module (110C) may be input to the third signal input unit (211C). Positive (+) and negative (-) signals transmitted from the sensor modules (110A, 110B, 110C) can be input in series to the signal input unit (211). In this case, each of the signals input in series to the first to third signal input units (211A, 211B, 211C) can be input to the first to third signal amplification units (212A, 212B, 212C) and amplified. In one embodiment, the signal input unit (211) can be expanded to 12 or more channels, not just the three channels described above. In addition, the signal amplification unit (212) corresponding thereto can also be expanded to 12 or more channels. Since it can be expanded to more than 12 channels, it can be customized to fit the channel desired by the user, and accordingly, the size of the sensing unit (100) can be appropriately adjusted, so that the sensing unit (100) according to the present specification can be placed on platforms having different end sizes.

Referring to FIG. 4, the control unit (200) may include an integrated signal input unit (211). A signal output from a first output terminal (111A) of a first sensor module (110A), a signal output from a first output terminal (111B) of a second sensor module (110B), and a signal output from a first output terminal (111C) of a third sensor module (110C) may be integrated into a single wire and input to the signal input unit (211). A signal output from a second output terminal (112A) of a first sensor module (110A), a signal output from a second output terminal (112B) of a second sensor module (110B), and a signal output from a second output terminal (112C) of a third sensor module (110C) may be integrated into a single wire and input to the signal input unit (211). Positive (+) and negative (-) signals transmitted from the sensor modules (110A, 110B, 110C) can be input in parallel to the signal input unit (211). In this case, each of the positive (+) and negative (-) signals input in parallel to the first to third signal input units (211A, 211B, 211C) can be input to the signal amplification unit (212) and amplified.

The control unit (200) may include a signal input unit (211), a signal amplification unit (212), a control unit (MCU), an output unit (220), and a power input unit (250). The control unit (200) may further include a control unit (230) and a recognition signal generation unit (240).

As described above, positive (+) and negative (-) signals output from the sensor module (110) can be input into the signal input unit (211).

The signal amplification unit (212) can amplify input signals as described above. The signal amplification unit (212) can be electrically connected to the signal input unit (211).

The signals detected by the sensing unit (100) may be in analog form, such as current, voltage, and/or impedance. The numerical values of the analog signals detected in this way may be measured in relatively small units compared to the numerical values typically used in the control unit (MCU) when considering the sensitivity of the sensor module (110), etc. The signal amplification unit (212) may amplify the difference between input values to facilitate calculation and/or judgment of the small unit numerical values detected.

For example, the signal amplification unit (212) may include an amplification circuit. The amplification circuit may be a circuit that can increase signal amplitude or current amount, etc. For example, the amplification circuit may include an operational amplifier, a differential amplification circuit, a source follower circuit, a buffer circuit, a signal generation circuit, a memory circuit, a control circuit, etc.

The control unit (MCU) can convert signals received from the signal amplifier (212) into digital signals and make judgments about preset values desired by the user. The control unit (MCU) can be electrically connected to the signal amplifier (212).

The control unit (MCU) may include an analog to digital converter (ADC) (213) and a processing unit (214). The processing unit (214) may include a CPU core, a power management unit, a power gate, a timer, a PLL, a non-volatile memory, a power circuit, and an interface element. In one embodiment, the control unit (MCU) may be a microcontroller unit.

The PLL can generate a clock signal and output it to internal circuits such as the CPU core and timer. The CPU core and timer can have a function that can process using the clock signal. The power management unit can control the power voltage supply to the internal circuit of the control unit by controlling the power gate. The PMU can also cut off the power supply to the internal circuit that does not need to be operated by controlling the power gate.

An analog signal transmitted from a signal amplifier (212) can be converted into a digital signal via an ADC (213). A semiconductor device such as a sensor unit can be connected to the ADC (213). A control unit (MCU) can process a signal input to the ADC and converted, and control to transmit the processing result to another wired/wireless module via a wired/wireless module. The control unit (MCU) can control to process another reception signal of a wired/wireless module, and transmit the processing result to another wired/wireless module.

The output unit (220) may output a signal to transmit a specific signal to another wired/wireless module. For example, a signal connected to the control unit (200) and transmitted to the host system (HS) may be output from the output unit (220). The output unit (220) may output a wired or wireless signal.

The power input unit (250) can receive power from the power supply unit (PS) of the external system (300) and supply power for the control unit to perform processing and control functions.

The adjustment unit (230) may include an Auto-Zero switch. The adjustment unit (230) may be used with a sensing unit that detects weight and/or mass, such as a sensor used in the present specification, to set a weight and/or mass being measured at any time as a reference value. In one embodiment, the reference value may be set to 0. The adjustment unit (230) may operate automatically or manually. For example, a user may arbitrarily set the current weight or mass being measured to be viewed as a value of 0 by looking at a numerical value displayed on a device that displays a current weight or mass measurement value.

In the step-type detection system according to the present specification, since the sensing unit (100) is installed at one end of the platform, the load is generally not detected before the door of the train opens. However, while the train has not arrived and the load is generally not detected, a load having a weight/mass that is lower than the operating reference value, such as dust, may be detected. For example, in the case of Subway Line 2 in Seoul, South Korea, since there are subway stations where the platforms are located outside, an object having a weight/mass that is lower than the operating reference value from the outside may be detected by the sensing unit (100). If the detected value is not regarded as a value of 0, the load may continue to be detected even after the train arrives, the door opens, and all passengers board, and the train may eventually depart with the screen door open. Because the screen door is in the open state, passengers may be able to access the track even during times when there is no train, which does not ensure safety. Accordingly, an accurate operating reference value can be determined by the adjustment unit (230), enabling stable detection. In addition, malfunction of the system according to one embodiment may not occur.

The cognitive signal generation unit (240) can generate a cognitive signal for passengers with impairments in specific senses among the five human senses.

For example, when a load is detected by the sensing unit (100) when a passenger crosses a section and the screen door is to be kept open, a visual signal may be required to identify this open state. Passengers can expect that the screen door will not close due to the visual signal and can safely pass through the door of the electric vehicle. The recognition signal may be a visual signal.

For example, when a visually impaired passenger crosses a section, such passenger has no other way of identifying whether the screen door is open. The recognition signal generating unit (240) can generate an audio signal that identifies that the door is open, thereby allowing the visually impaired passenger to anticipate that the screen door will not close. The recognition signal can be an auditory or audio signal.

A cognitive signal, such as a voice or visual signal, may be generated from a cognitive signal generator (240) and transmitted to a host system (HS). The cognitive signal generator (240) and the host system (HS) may be electrically connected. Specifically, the host system (HS) may include a cognitive signal receiver (CSR). The cognitive signal receiver (CSR) may cause the platform to be notified that the screen door is in an open state by passengers crossing the platform based on the transmitted visual signal. For example, the cognitive signal receiver (CSR) may transmit a signal that passengers can visually perceive to a display device or a display device disposed on the platform. For example, the cognitive signal receiver (CSR) may transmit a signal that passengers can auditorily perceive to an audio device disposed on the platform.

Figure 5 is a diagram showing the non-load section and the periodic load section on a daily basis. Figure 6 is a diagram for explaining the non-load section and the periodic load section on a time axis.

Referring to FIGS. 5 and 6, the step-type detection system according to the present specification may include a No Load Section (NLS) and a Periodic Load Section (PLS) based on a 24-hour period. For convenience of explanation, the first time between 00:00 and 24:00 when a subway first arrives at a platform, the doors and screen doors of the subway car open, and passenger load can be applied is set to 06:00, and the last time when passenger load is applied is set to 24:00.

The non-loading period (NLS) of the step-type detection system according to this specification may be from 24:00 (00:00 the next day) to 06:00 the next day, which is the last time passenger load is applied the previous day. The periodic loading period (PLS) may be from 06:00 to 24:00.

The non-loaded load section (NLS) may include a first disabled section (S1) and a waiting section (S2).

The periodic load loading interval (PLS) can include N periodic load loading intervals per day. For example, the periodic load loading interval (PLS) can include a first periodic load loading interval (PLS(1)), a second periodic load loading interval (PLS(2)), ??, an N-j-th periodic load loading interval (PLS(N-j)), ??, an N-th periodic load loading interval (PLS(N)). j can be an integer greater than or equal to 0 and less than or equal to N-1. The N-j-th periodic load loading interval can include a load loading interval (S3), an activation interval (S4), a non-loading interval (S5), and a second deactivation interval (S6).

The first and second deactivated sections (S1, S6) may be deactivated sections in which the step-type detection system according to the embodiment of the present disclosure does not operate after the activated section (S4) and the non-loaded section (S5). For example, the screen door may remain closed (C) in the first and second deactivated sections (S1, S6).

The standby section (S2) may be a section that the system according to the embodiment of the present specification enters when the first inactive section (S1) does not operate for a predetermined period of time during a time period when electric trains do not operate, such as late at night or early in the morning. The predetermined time may be appropriately adjusted according to the user. When entering the standby section (S2), the low-power standby mode, such as the sleep mode, may be entered, thereby reducing the power consumption of the step-type detection system. For example, the screen door may be maintained in a closed state (C) during the standby section (S2).

The load loading section (S3) may be a section where the load of the passenger is detected as the passenger's load is applied to the sensing unit when the doors and screen doors of the electric train are opened. In one embodiment, the applied load may be preset according to the user's needs. For example, the preset value that serves as a reference may be 3 kg to 20 kg. If it is less than 3 kg, the screen door may remain open not only for the person who is the subject of safety assurance but also for other objects such as foreign substances, which ultimately leads to a problem in that the safety of the passengers inside the platform is not secured. If it is greater than 20 kg, even if the load of a passenger with a relatively light weight such as a child or a newborn is detected, the screen door will close, which leads to a problem in that the safety of these passengers is not secured.

The activation section (S4) may be a section in which the foot-type detection system according to the present specification remains activated as the passenger load is continuously applied. In the activation section (S4), since the passenger load is detected, even if the door of the electric car is closed, the screen door should not be closed. Accordingly, in the activation section (S4), the screen door can be continuously maintained in an open state (O).

The load-free section (S5) may be a section in which the train doors are closed and the screen doors are open and no passenger load is continuously applied for a predetermined period of time. In one embodiment, the predetermined period of time may be adjusted to suit the needs of the user.

For example, the screen door can be maintained in the open state (O) in the load loading section (S3), the active section (S4), and the non-load loading section (S5).

The non-loaded section (S5) of the Nth periodic load loading section (PLS(N)) can be specified around 24:00 according to the predetermined train schedule of the electric train. After that, the step-type detection system according to the present specification can enter the first non-loaded section (S1).

Fig. 7 is a plan view showing a sensing unit according to one embodiment of the present specification. Components having substantially the same function as those in the above-described embodiment are given the same drawing reference numerals and repeated descriptions thereof are omitted.

Referring to FIG. 7, the sensing unit (100) may include a sensor module. For example, the sensing unit (100) may include a first sensor module (110A), a second sensor module (110B), and a third sensor module (110C) as a plurality of sensor modules, but is not limited thereto.

For each component included in the first to third sensor modules (110A, 110B, 110C), only different reference symbols (A, B, C) are provided to identify them from other sensor modules, and only the first sensor module (110A) is described below as an example.

The first sensor module (110A) may include a first output terminal (111A), a second output terminal (112A), a case upper plate (120A), a case lower plate (130A), and a sensor (140A).

The case top plate (120A) may be arranged to have a smaller vertical length than the case bottom plate (130A) and overlap the case bottom plate (130A). In one embodiment, the case top plate (120A) may have the same vertical length as the case bottom plate (130A).

The case top plate (120A) may be arranged to overlap the case bottom plate (130A) with a smaller horizontal length than the case bottom plate (130A). In one embodiment, the case top plate (130A) may have the same horizontal length as the case bottom plate (130A).

The sensor (140A) may have a horizontal length that is longer than its vertical length. The horizontal length of the sensor (140A) may correspond to the horizontal length of one of the screen doors. For example, the horizontal length of the sensor (140A) may be arranged to correspond to the horizontal length of the first door (D1) of FIG. 2 described above. Accordingly, only one sensor may be arranged without the sensor (140A) needing to be unnecessarily extended in the horizontal direction, and since multiple output terminals do not need to be arranged, the structure may be simplified and wiring may be easily organized. In addition, since the sensor module (110A) is extended only in the vertical direction and not the horizontal direction, the wiring connected to the output terminal may be more easily organized, and both series and parallel connections may be possible.

The sensor (140A) may include a tapered portion (141A) whose vertical length becomes smaller in the direction in which the first and second output terminals (111A, 112A) are arranged. The case top plate (120A) may include a convex portion (121A) whose vertical length becomes smaller in correspondence with the shape of the sensor (140A) including the tapered portion (141A).

In one embodiment, the shape of the case top plate (120A) may be formed to correspond to the sensor (140A), but is not limited thereto. The horizontal central axes of the sensor (140A) and the case top plate (120A) may be substantially the same, but are not limited thereto. For example, the sensor may be positioned within a range in which the case top plate (120A) overlaps the case bottom plate (130A) in a planar direction.

The positions of the first output terminal (111A) and the second output terminal (112A) can be interchanged and are not limited to the positions in the illustrated drawing.

Fig. 8 is a plan view showing a sensing unit according to another embodiment of the present specification. Components having substantially the same function as those in the above-described embodiment are given the same drawing reference numerals and a repeated description thereof is omitted.

Referring to Fig. 8, the sensor (140A) may have a curved shape with one end bent. The case lower plate and upper plate (130A, 120A) may be formed in a curved shape corresponding to the shape of the sensor (140A).

The first and second sensor modules in the curved shape included in the sensing unit can be combined so that each curved portion corresponds to a corner or vertex of the other sensor module. In this case, since the directions of the wiring coming from the first output terminal (111A) and the second output terminal (112A) are different, the signal input terminals for each sensor module are arranged in different locations, and when each of them must be connected in series to the signal input terminal, wiring management can be facilitated.

According to one embodiment, the sensing unit may have a section (left end and right end based on the horizontal direction) where the sensitivity of the sensor (140A) is concentrated, so that the load detection area (Active Area) of the sensor can be distinguished. For example, the section where passengers get on and off a subway platform may include a predetermined section, such as a single-line stand. Since the platform may include a sign for this purpose, if a sensing unit such as the above-described embodiment is used, the detection rate of the section where the sensitivity should be concentrated can be improved.

Fig. 9 is a perspective view showing a sensor module according to one embodiment of the present specification. Fig. 10 is a cross-sectional view showing a sensor module according to one embodiment of the present specification. Fig. 10 is also a cross-sectional view taken along line I-I` of Fig. 7.

Referring to FIGS. 9 and 10, the sensor module (110) may include a case lower plate (130), a sensor (140), first and second adhesive layers (181, 182), a relief layer (160), and a case upper plate (120). The sensor module (110) may further include a third adhesive layer (183) and a foot plate (170).

The case lower plate (130) may include a concave portion (131) on which a sensor (140) and a relief layer (160) may be mounted. The sensor (140) may be placed on the concave portion (131). The case lower plate (130) may be formed of a hard material so that the mounted sensor (140) may withstand a load applied via the footboard (170). Considering that there is a subway station with a platform located outside, the case lower plate (130) may be formed of a metal material so that it may be durable against external environments such as external temperature, external humidity, and foreign substances at the bottom. In a preferred embodiment, the case lower plate (130) may be formed of aluminum (Al).

The sensor (140) may be placed on the concave portion (131) of the case lower plate (130). A first adhesive layer (181) may be placed on the sensor (140). The first adhesive layer (181) may fix the positive layer (160) and the sensor (140) to each other by closely contacting them. Reference symbol 140P indicates an orthogonal projection shape assuming that the sensor (140) is mounted on the concave portion (131).

A relief layer (160) may be arranged on the first adhesive layer (181). The relief layer (160) may improve the detection rate of the sensor (140) by allowing the load transmitted through the foot plate (170) to be better transmitted to the sensor (140). In addition, the sensor (140) may be protected by the relief layer (160), so that the durability of the detection system according to one embodiment of the present specification may be enhanced. In one embodiment, the case lower plate (130) includes a concave portion (131), and the foot plate (170) is arranged on the concave portion that is relatively protruded compared to the concave portion (131), and since the sensor (140) may not be arranged to exactly correspond to the concave portion (131), the load according to the weight of the passenger may be distributed and transmitted to the empty space within the concave portion or the concave portion (131). By arranging the relief layer (160), the load can be better transmitted to the sensor (140). In one embodiment, the relief layer (160) can have a shape corresponding to the sensor (140). Specifically, the relief layer (160) can have a shape corresponding to the load detection area of the sensor (140). In order to improve the sensitivity or detection rate of the sensor (140), the load applied to the case top plate (120) corresponding to the relatively wide concave portion (131) can be concentrated and transmitted to the relief layer (160). The relief layer (160) may also be referred to as a first relief portion (160) in the sensor module (110) according to the embodiment.

In one embodiment, the relief layer (160) may be formed of a soft material or a hard material. Preferably, the relief layer (160) may be formed of a soft material. More preferably, the relief layer (160) may be formed by including polyurethane (PU). As for the brand name, it may be formed using a commercially available Poron tape.

A case top plate (120) may be placed on the relief layer (160). The case top plate (120) may cover the entire engraved portion (131) to protect the detection unit including the sensor (140) and the relief layer (160) from the external environment. The case top plate (120) may include a relief portion (125) that protrudes downwardly from the sensor module (110) on which the sensor (140) is placed. The relief portion (125) may also be referred to as a second relief portion (125). The sensor module (110) according to the present specification may improve the detection rate of the sensor (140) by including the first and second relief portions (160, 125). The second relief portion (125) may have a shape corresponding to the shape of the sensor (140) for a similar reason to the first relief portion (160) described above. In one embodiment, referring to the operating principle of the sensor (140) as described below, the second relief portion (125) may include a plurality of protrusions corresponding to the load detection area of the sensor (140). The second relief portion (125) may include a plurality of protrusions corresponding to the first and second patterns of the sensor (140).

As described above, since the sensor (140) may not be formed to exactly correspond to the engraved portion (131), an empty space may occur in the engraved portion (131) in which the sensor (140) and the components arranged to correspond to the shape of the sensor (140) do not exist. Accordingly, the case top plate (120) can secure the sensor (140) and the like to the engraved portion (131) through the second adhesive layer (182) arranged in this empty space. Although not illustrated, the second adhesive layer (182) may also be arranged between the case top plate (120) and the relief layer (160).

A third adhesive layer (183) may be arranged on the first and second adhesive layers (181, 182), the relief layer (160), and the case top plate (120) arranged on the case bottom plate (130) and the engraved portion (131) of the case bottom plate (130). The third adhesive layer (183) may secure the foot plate (170) to the case bottom plate (130) and the case top plate (120).

In the sensor module (110) used in the detection system according to the present specification, a load may be applied to the footrest (170). The footrest (170) may include a footrest protrusion (171) for the visually impaired.

FIG. 11 is a plan view showing a sensor according to one embodiment of the present specification. FIGS. 12 and 13 are cross-sectional views showing a sensor according to one embodiment of the present specification. FIG. 14 is a cross-sectional view for explaining the operating principle of a sensor according to one embodiment of the present specification. FIG. 12 is also a cross-sectional view taken along the line I``-I``` of FIG. 11. FIG. 13 is also a cross-sectional view taken along the line J-J` of FIG.

Referring to FIGS. 11 to 14, the sensor (140) may include a load detection area (A1) and a non-load detection area (A2).

A first adhesive layer (181) is placed on the load sensing area (A1) so that the relief layer and the sensor (140) can be fixed in close contact with each other.

A first pattern (142) and a second pattern (143) may be arranged in the load sensing area (A1). The first and second patterns (142, 143) may be arranged as one layer connected to each other by a non-pattern layer (144). The first and second patterns (142, 143) may be formed of a conductive material. In the first and second patterns (142, 143), a change in current, voltage, or impedance may occur due to an applied load.

Each of the first and second patterns (142, 143) may include a plurality of first and second protrusions (142P, 143P) protruding toward each other. The first protrusions (142P) and the second protrusions (143P) may be arranged to alternately intersect with each other in the longitudinal direction in which the sensors are arranged. Between the first protrusions (142P) and the second protrusions (143P), a conductive film (145) may appear to be arranged on a plane of the sensor (140).

Referring to the cross-sectional view, the sensor (140) may include an upper film (146), a lower film (147), and a fourth adhesive layer (184) disposed between them (146, 147). A conductive film (145) may be disposed on the lower film (147) in a space other than a space where the fourth adhesive layer (184) is disposed to adhere and fix the upper and lower films (146, 147) to each other. The conductive film (145) may be formed to include at least one selected from the group consisting of carbon and silver (Ag). A first pattern (142) and a second pattern (143) may be disposed on the conductive film (145).

The first protrusion (142P) and the second protrusion (143P) may include first and second posts (142T, 143T) protruding downwardly in the thickness direction of the sensor (140). When an applied load is transmitted through the upper film (146), some of the first and second patterns (142, 143) having conductivity may come into contact with the conductive film (145) by the first and second posts (142T, 143T) (see FIG. 14). Accordingly, a change in current, voltage, or impedance may occur, and such change may be transmitted to the signal input unit through the first and second output terminals (111, 112) to which the first and second patterns (142, 143) are respectively connected, and the signal may be amplified and processed in a direction set by the user through a program preset in the control unit.

FIG. 15 is a plan view showing a case top plate according to one embodiment of the present specification.

Referring to FIG. 15, the case top plate (120) may include a plurality of second relief portions (125) protruding downwardly from the sensor module. As described above, sensing may occur only when at least a portion of the first and second patterns (142, 143) contacts the conductive film (145) by the first and second pillars (142T, 143T) arranged on the first and second relief portions (142P, 143P) of each of the first and second patterns (142, 143). A load ultimately needs to be applied to the first and second relief portions (142P, 143P). In order to improve the sensitivity and detection rate of sensing, the second relief portions (125) may have a shape corresponding to the load detection area (A1). In one embodiment, the second relief portion (125) may be formed in multiple pieces to correspond to the shapes of the first and second protrusions (142P, 143P).

Figure 16 is a simulation table showing the sensitivity of the sensor depending on the presence or absence of a relief.

Referring to Fig. 16, the first to third comparative examples represent relative values of signals detected by the control unit when a load is applied to a specific location of the sensor module without arranging a relief portion on the case top plate. The first to third comparative examples have different applied loads.

The first to third embodiments represent relative values of signals detected by the control unit when a relief portion is placed on the case top plate and a load is applied to each specific location of the sensor module. The first to third embodiments have different applied loads.

The loads applied in the first comparative example and the first embodiment are the same. The loads applied in the second comparative example and the second embodiment are the same. The loads applied in the third comparative example and the third embodiment are the same.

Referring to this, it was confirmed that when a relief is placed on the case top plate, the detection of the amount of change is improved compared to when a relief is not placed.

Although the embodiments of this specification have been described in more detail with reference to the attached drawings, the scope of the invention according to this specification is not necessarily limited to these embodiments, and various modifications may be implemented without departing from the technical spirit of this specification.

Accordingly, the embodiments disclosed in this specification are not intended to limit the technical idea of the scope of rights according to this specification, but are intended to be representative, and the scope of the technical idea of this specification is not limited by these embodiments.

Therefore, the embodiments described above should be understood as illustrative in all respects and not restrictive.

The scope of protection of this specification should be interpreted by the claims, and all technical ideas within the scope equivalent thereto should be interpreted as being included in the scope of the invention according to this specification.

Claims (10)

A sensing unit (100) including at least one sensor module (110); and
It includes a control unit (200) that processes a signal sensed from the sensing unit (100),
The above sensor module (110) is
A case lower plate (130) including an engraved portion (131);
A sensor (140) placed on the above engraved portion (131);
A first relief portion (160) placed on the above sensor (140); and
It includes a case top plate (120) placed on the first relief portion (160),
A foot-type detection system, wherein the case top plate (120) includes a second raised portion (125) protruding in the direction in which the sensor (140) is placed. delete In the first paragraph,
The above sensor (140) includes a load detection area (A1) and a load non-detection area (A2) including a first pattern (142) and a second pattern (143),
A foot-type detection system, wherein the first relief portion (160) has a shape corresponding to the shape of the load detection area (A1). In the third paragraph,
The above sensor module (110) is
A first adhesive layer (181) arranged between the first relief portion (160) and the sensor (140); and
A foot-type detection system including a second adhesive layer (182) disposed between the case lower plate (130) and the case upper plate (120). In the first paragraph,
The above sensor (140) includes a load detection area (A1) and a load non-detection area (A2) including a first pattern (142) and a second pattern (143),
The above first pattern (142) includes a first protrusion (142P) that protrudes in the direction in which the second pattern (143) is arranged,
A foothold-type detection system, wherein the second pattern (143) includes a second protrusion (143P) that protrudes in the direction in which the first pattern (142) is arranged. In clause 5,
The above sensor (140) includes a first output terminal (111) for outputting a signal detected from the first pattern (142) and a second output terminal (112) for outputting a signal detected from the second pattern (143).
A foothold-type detection system, wherein the first protrusion (142P) and the second protrusion (143P) are arranged to intersect each other in the direction in which the first output terminal (111) and the second output terminal (112) are arranged. In Article 6,
The above sensor (140) is,
An upper film (146) placed on the first pattern (142) and the second pattern (143);
A conductive film (145) disposed under the first pattern (142) and the second pattern (143); and
A foothold-type detection system including a lower film (147) disposed under the conductive film (145). In Article 7,
The above first protrusion (142P) includes a first pillar (142T) protruding in the direction in which the conductive film (145) is arranged,
A foothold-type detection system, wherein the second protrusion (143P) includes a second pillar (143T) protruding in the direction in which the conductive film (145) is arranged. In Article 8,
The above sensor module (110) is
A foot-type detection system including a first adhesive layer (181) arranged between the load detection area (A1) of the sensor (140) and the first relief portion (160). In the first paragraph,
The above first relief portion (160) is a foothold-type detection system including polyurethane (PU).

Images