[go: up one dir, main page]

WO2019035323A1 - Système de traitement de signal et procédé de traitement de signal - Google Patents

Système de traitement de signal et procédé de traitement de signal Download PDF

Info

Publication number
WO2019035323A1
WO2019035323A1 PCT/JP2018/027706 JP2018027706W WO2019035323A1 WO 2019035323 A1 WO2019035323 A1 WO 2019035323A1 JP 2018027706 W JP2018027706 W JP 2018027706W WO 2019035323 A1 WO2019035323 A1 WO 2019035323A1
Authority
WO
WIPO (PCT)
Prior art keywords
frequency
signal
current
magnetic element
signal processing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2018/027706
Other languages
English (en)
Japanese (ja)
Inventor
浩章 辻本
一徳 高畠
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sirc Co ltd
Osaka Metropolitan University
University of Osaka NUC
Original Assignee
Sirc Co ltd
Osaka University NUC
Osaka City University PUC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sirc Co ltd, Osaka University NUC, Osaka City University PUC filed Critical Sirc Co ltd
Priority to JP2019536713A priority Critical patent/JPWO2019035323A1/ja
Publication of WO2019035323A1 publication Critical patent/WO2019035323A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Images

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
    • G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
    • G01R15/20—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using galvano-magnetic devices, e.g. Hall-effect devices, i.e. measuring a magnetic field via the interaction between a current and a magnetic field, e.g. magneto resistive or Hall effect devices
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R23/00—Arrangements for measuring frequencies; Arrangements for analysing frequency spectra
    • G01R23/16—Spectrum analysis; Fourier analysis
    • G01R23/165—Spectrum analysis; Fourier analysis using filters

Definitions

  • the present invention relates to techniques of a signal processing system and a signal processing method.
  • Patent Document 1 Signal processing systems that perform time-frequency analysis of signals in real time are used in various fields.
  • a contact detection sensor attached to a human body acquires a detection signal related to a heartbeat state, which is a reflection signal of an ultrasonic signal transmitted toward the inside of the body, and the cycle of the acquired detection signal is fast Fourier
  • a heart rate analysis device has been proposed that processes by conversion and performs frequency analysis in real time.
  • the present invention in one aspect, is made in view of such circumstances, and an object thereof is to provide a low-cost and compact signal processing system and method capable of performing time-frequency analysis of a signal in real time. It is.
  • the present invention adopts the following configuration in order to solve the problems described above.
  • a signal processing system includes: a receiving unit having a receiving unit that receives a signal; and a wiring unit that flows an analysis target current of a frequency according to the frequency of the received signal; And a plurality of detection devices configured to respectively detect components of different frequencies, wherein each of the detection devices is disposed at a predetermined distance from the wiring portion, and the current to be analyzed flows in the wiring portion And a magnetic element having a pair of drive terminals and a pair of measurement terminals, connected to the pair of drive terminals and having a predetermined frequency.
  • a current source for outputting an alternating current to the magnetic element, and the pair of measurement terminals so as to form a circuit with the magnetic element, when the frequency of the signal is a specific frequency
  • a circuit configured to pass a current of a component of a sum or a difference of the frequency of the current to be analyzed and the predetermined frequency, and the filter circuit disposed between any one of the pair of measurement terminals and the filter;
  • a detector configured to detect the current flowing through.
  • the signal processing system includes a reception device that receives a signal, and a plurality of detection devices that detect an analysis target current flowing through a wiring unit of the reception device according to the received signal.
  • the magnetic element of each detection device is disposed at a predetermined distance from the wiring portion of the receiving device, and the resistance value is changed in accordance with the magnetic field generated by the analysis target current flowing through the wiring portion.
  • the magnetic element is, for example, a magnetoresistive element, a Hall element, or the like, and can be manufactured inexpensively and in a small size. Therefore, according to the configuration, it is possible to provide a low-cost and compact signal processing system capable of performing time-frequency analysis of a signal in real time.
  • the signal received by the receiving apparatus may include any type of signal such as light, radio signal, and vibration.
  • the current to be analyzed may be derived from the voltage of the received signal. That is, the detection of the analysis target current by the detection device may be performed for the purpose of detecting the voltage of the received signal.
  • the signal may be an audio signal or an ultrasonic signal.
  • voice signal or an ultrasonic wave signal is realizable.
  • the signal processing system may further include a storage unit that stores correspondence relationship information indicating a correspondence relationship between the frequency of the signal and information indicated by the signal of the frequency. According to this configuration, it is possible to realize information communication using time frequency analysis that can be performed in real time.
  • a signal processing method includes the steps of: receiving a signal by a receiving device; flowing an analysis target current of a frequency according to a frequency of the received signal to a wiring unit of the receiving device; Identifying the strength of the component of each frequency of the current to be analyzed flowing through the wiring section by a plurality of detection devices configured to detect components of different frequencies of the current to be analyzed, respectively;
  • the detection device is a magnetic element disposed at a predetermined distance from the wiring portion and configured to change a resistance value according to a magnetic field generated by the analysis target current flowing through the wiring portion, and the pair of detection devices
  • a magnetic element having a drive terminal and a pair of measurement terminals; a current source connected to the pair of drive terminals and outputting an alternating current of a predetermined frequency to the magnetic element; It is connected to the pair of measurement terminals so as to form a path, and when the frequency of the signal is a specific frequency, passes the current of the component of the sum or difference of the frequency of the current to be
  • a filter configured as described above; and a detector disposed between any one of the pair of measurement terminals and the filter and configured to detect the current flowing in the circuit.
  • the signal may be an audio signal or an ultrasonic signal.
  • voice signal or an ultrasonic wave signal is realizable.
  • the signal processing method further includes the step of identifying the content of the information indicated by the received signal based on the correspondence information indicating the correspondence between the frequency of the signal and the information indicated by the signal of the frequency. May be equipped. According to this configuration, it is possible to realize information communication using time frequency analysis that can be performed in real time.
  • FIG. 1 schematically illustrates an example of a signal processing system according to an embodiment.
  • FIG. 2 schematically illustrates an example of each detection device according to the embodiment.
  • FIG. 3 schematically illustrates an example of a control device according to the embodiment.
  • FIG. 4 schematically illustrates an example of the processing procedure of the signal processing system according to the embodiment.
  • FIG. 5 schematically illustrates an example of use of the signal processing system according to the embodiment.
  • FIG. 6 schematically illustrates an example of use of the signal processing system according to the embodiment.
  • FIG. 7 shows the configuration of a signal processing system according to an embodiment.
  • FIG. 8A shows an analysis result of a speech signal using speech analysis software.
  • FIG. 8B shows the measurement results of the audio signal by the signal processing system.
  • the present embodiment an embodiment according to one aspect of the present invention (hereinafter, also referred to as “the present embodiment”) will be described based on the drawings.
  • the embodiment described below is merely an example of the present invention in all points, and is not intended to limit the scope thereof. It goes without saying that various improvements and modifications can be made without departing from the scope of the present invention. That is, in the implementation of the present invention, a specific configuration according to the embodiment may be appropriately adopted.
  • FIG. 1 schematically illustrates an example of the configuration of a signal processing system 1 according to the present embodiment.
  • the signal processing system 1 according to the present embodiment includes a reception device 2, a plurality of detection devices 3, and a control device 5. Each component will be described below.
  • the receiving device 2 includes a receiving unit 21 that receives a signal to be subjected to time frequency analysis, a current source 22 that outputs an analysis target current of a frequency according to the frequency of the received signal, and a current source 22. And a wiring unit 23 for flowing an analysis target current output from the circuit.
  • the type of signal to be analyzed may be appropriately selected according to the embodiment.
  • the signal to be analyzed may be an audio signal, an ultrasonic signal, an electromagnetic wave signal or the like.
  • the receiving unit 21 is appropriately configured to receive the signal according to the type of the signal to be analyzed.
  • the receiving unit 21 may be configured by a microphone, an ultrasonic wave receiver, an antenna, and the like.
  • the current source 22 is configured to output an analysis target current of a frequency corresponding to the frequency of the signal received by the receiving unit 21 to the wiring unit 23.
  • the current source 22 is configured to output an analysis target current having the same frequency as the signal received by the receiving unit 21 to the wiring unit 23.
  • a bipolar power supply or the like may be used as such a current source 22.
  • the wiring portion 23 is appropriately configured such that an analysis target current output from the current source 22 flows, for example, by a conductive wire or the like.
  • the wiring portion 23 may include an element such as a resistor.
  • each detection device 3 will be described with further reference to FIG.
  • FIG. 2 schematically illustrates an example of the configuration of the detection device 3 according to the present embodiment.
  • Each detection device 3 can be configured the same as the current measurement device described in WO 2015/056397.
  • each detection device 3 according to the present embodiment includes a magnetic element 31, a current source 32, a low pass filter 33, and a detector 34.
  • the magnetic element 31 is disposed at a predetermined distance from the wiring portion 23 of the receiving device 2, and is configured such that the resistance value changes according to the magnetic field generated by the analysis target current flowing through the wiring portion 23. That is, the magnetic element 31 is configured to have the property that the flow of current is changed by the magnetic field applied from the outside.
  • a magnetic element 31 for example, a magnetoresistive element, a Hall element or the like can be used.
  • the magnetic element 31 includes a pair of drive terminals 311 and a pair of measurement terminals 312.
  • each drive terminal 311 and each measurement terminal 312 may be comprised by a common terminal.
  • the pair of measurement terminals 312 may be disposed at right angles to the direction in which the pair of drive terminals 311 is disposed. Arrangement of each terminal (311, 312) may be suitably determined according to the kind of magnetic element to be used.
  • the magnetic element 31 may be appropriately fixed by a holder or the like so that the distance to the wiring portion 23 becomes constant.
  • the magnetic element 31 is preferably fixed so that the conductive wire constituting the wiring portion 23 is disposed immediately below or directly above the thickness direction of the magnetic element 31.
  • the magnetic element 31 is fixed in parallel to the current flowing through the magnetic element 31 and adjacent to the magnetic element 31 so that the conductive wire forming the wiring portion 23 is disposed. Is preferred.
  • an inclined continuous pattern may be formed on the surface of the magnetic element 31 by a conductor such as copper.
  • a barber pole pattern or the like may be formed on the surface of the magnetic element 31.
  • the current source 32 is connected to the pair of drive terminals 311.
  • the current source 32 is configured to output an alternating current of a predetermined frequency to the magnetic element 31.
  • a signal generator such as Texio FGX-295 can be used.
  • the low pass filter 33 and the detector 34 are connected to the pair of measurement terminals 312 so as to form the magnetic element 31 and the circuit 35.
  • the detector 34 may be disposed between any one of the pair of measurement terminals 312 and the low pass filter 33.
  • the detector 34 is configured to detect the current flowing in the circuit 35.
  • a PC Personal Computer
  • an analog input / output terminal such as ATEC 160802AY-USB manufactured by Contech Inc.
  • ⁇ is a proportional constant.
  • the analysis target current I 1 flowing through the wiring portion 23, in order to correspond to the frequency of the received signal can be expressed as the following 6 equations.
  • current I 2 flowing through the magnetic element 31 are the alternating current having a predetermined frequency, it can be expressed as the following Equation 7 expression.
  • i 1 and i 2 represent the magnitude of each current.
  • f 1 represents the frequency of the current to be analyzed and corresponds to the frequency of the received signal.
  • f 2 represents the frequency of the alternating current supplied from the current source 32.
  • t represents time.
  • ⁇ is the pi.
  • ⁇ is a proportional constant. Therefore, as shown by the equation 8, between both ends of the magnetic element 31, the sum (f 1 + f 2 ) and the difference (f 1 -f 2 ) of the frequency of the current to be analyzed and the frequency of the alternating current by the current source 32 The voltage of two frequency components can be observed. Therefore, by setting the cutoff frequency of the frequency f 2 and the filter of the current source 32 of the detection device 3 (the low-pass filter 33) appropriately, it is possible to detect the intensity of different frequency components by the detector 3 This allows time-frequency analysis of the signal.
  • time frequency analysis of the signal is performed using the component of the difference (f 1 -f 2 ) as follows. That is, the cutoff frequency of the low pass filter 33 of each detection device 3 is set sufficiently smaller than f 1 and f 2 . Then, when the frequency component of the sum (f 1 + f 2 ) is not observed and the frequency f 2 of the current source 32 substantially coincides with the frequency f 1 of the current to be analyzed, the following number is obtained between both ends of the magnetic element 31 It becomes possible to observe the voltage V mr as shown in FIG.
  • the low-pass filter 33 is configured to pass a current component of the difference between the frequency f 2 of the frequency f 1 and the AC current of the analyzed current . That is, when the receiving device 2 receives a signal of a certain frequency, the low-pass filter of the detecting device 3 set to output an alternating current having a frequency substantially matching the frequency f 1 of the analysis target current flowing in the wiring unit 23 Only 33 can be made to pass the component of the difference (f 1 -f 2 ).
  • each detection device 3 is configured to be able to detect the strengths of components of different frequencies of the analysis target current flowing through the wiring unit 23 of the reception device 2, that is, the strength of the target frequency of the received signal. Therefore, according to each detection device 3 according to the present embodiment, since the strength of the target frequency of the received signal can be specified, it is possible to perform time-frequency analysis of the received signal in real time. Become.
  • the number of frequencies that can be subjected to time-frequency analysis corresponds to the number of detection devices 3 provided in the signal processing system 1. Therefore, the number of detection devices 3 provided in the signal processing system 1 may be appropriately determined according to the number of frequencies to be subjected to time frequency analysis. By providing two or more detection devices 3, two or more frequencies can be targeted for time frequency analysis.
  • the signal to be received may not be composed of a single frequency component, but may be composed of a plurality of frequency components.
  • each of the frequency components constituting the signal can be detected by the corresponding plurality of detection devices 3.
  • the detection of the analysis target current by the detection device 3 may be performed for the purpose of detection of a voltage.
  • FIG. 3 schematically illustrates an example of the configuration of the control device 5 according to the present embodiment.
  • the control device 5 according to the present embodiment is a computer to which the control unit 51, the storage unit 52, and the external interface 53 are electrically connected.
  • the external interface is described as "external I / F".
  • the control unit 51 includes a central processing unit (CPU), a random access memory (RAM), a read only memory (ROM), and the like, and controls each component according to information processing.
  • the storage unit 52 is, for example, an auxiliary storage device such as a hard disk drive or a solid state drive, and stores programs and the like executed by the control unit 51.
  • the storage unit 52 holds correspondence relationship information 521.
  • Correspondence information 521 indicates the correspondence between the frequency of the signal and the information indicated by the signal of the frequency.
  • correspondence relationship information 521 may be configured by, for example, data in a table format.
  • the external interface 53 is an interface for connecting to an external device, and is appropriately configured according to the type of external device to be connected.
  • the control device 5 is connected to each detection device 3 via the external interface 53. Thereby, the control device 5 controls each detection device 3 and acquires the detection result of the target frequency component from each detection device 3.
  • control unit 51 may include a plurality of hardware processors.
  • the control device 5 may be configured by a plurality of computers.
  • the control device 5 may be a general-purpose PC or the like in addition to an information processing device designed specifically for the service to be provided.
  • a general-purpose PC is used as the detector 34, at least a part of the detector 34 of each detection device 3 may be configured by the control device 5.
  • FIG. 4 schematically illustrates an example of the processing procedure of the signal processing system 1 according to the present embodiment.
  • the processing procedure described below corresponds to the "signal processing method" of the present invention.
  • the processing procedure described below is merely an example, and each processing may be changed as much as possible.
  • steps may be omitted, replaced, or added as appropriate, according to the embodiment.
  • Step S101 the receiving unit 21 of the receiving device 2 receives a signal.
  • the source of the signal may not be particularly limited.
  • the signal source is a known ultrasonic transmitter, and the receiver 21 of the receiver 2 , Receive the reflected wave (ultrasonic signal) from the wall of the tunnel.
  • the signal source is a part that strikes, and the receiving unit 21 of the receiving device 2 receives an impact sound (voice signal).
  • the signal transmission source is a transmitting device configured by a known ultrasonic transmitter or the like, and the receiving device 2 The receiver 21 receives the ultrasonic signal transmitted from the transmission device of the communication partner.
  • Steps S102 and S103 In the next step S102, the current source 22 is driven, and an analysis target current corresponding to the frequency of the signal received in step S101 is supplied to the wiring unit 23 of the receiving device 2.
  • the frequency of the current to be analyzed may be the same as the frequency of the received signal.
  • the intensity of the component of each frequency of the analysis target current flowing through the wiring unit 23 is specified by each detection device 3.
  • the resistance value of the magnetic element 31 is changed by the magnetic field formed around the wiring portion 23.
  • the circuit 35 including the magnetic element 31 two frequency components of the sum (f 1 + f 2 ) and the difference (f 1 -f 2 ) of the frequency of the current to be analyzed and the frequency of the alternating current by the current source 32 Current flows.
  • the current source 32 of each detection device 3 is configured to output an alternating current having a predetermined frequency different from that of the other detection devices 3.
  • the low-pass filter 33 of each detection device 3 has a sufficiently small cutoff frequency, so that the frequency of the received signal corresponds to a specific frequency corresponding to the frequency f 1 of the current to be analyzed and the frequency f 2 of the alternating current. And the current of the component of the difference between the two frequencies (f 1 -f 2 ).
  • each detection device 3 detects the strength of the corresponding frequency of the received signal by detecting the strength of the different frequency component of the analysis target current flowing through the wiring unit 23 of the reception device 2.
  • the signal processing system 1 causes each frequency in the received signal (each detection device to be performed by the reception device 2 and each detection device 3 continuously performing the series of processes in steps S101 to S103).
  • the time variation of the intensity of the corresponding frequency component of 3 can be identified. That is, the signal processing system 1 according to the present embodiment can perform time-frequency analysis of the received signal in real time.
  • Step S104 In the next step S104, the control unit 51 of the control device 5 acquires the detection result of the target frequency component from each detection device 3. Then, based on the correspondence relationship information 521 stored in the storage unit 52, the control unit 51 identifies the content of the information indicated by the signal received in step S101.
  • the signal processing system 1 ends the processing procedure according to the present operation example.
  • Each detection device 3 can be used as a reception device that receives 1-bit information by associating the state in which the received signal has the target frequency with the state in which the received signal does not have the on-off state. Therefore, according to the present embodiment, by providing, for example, 100 detection devices 3 in the signal processing system 1, 100 bits of information can be received in one cycle.
  • the time of the intensity of each frequency (corresponding frequency of each detection device 3) component in the received signal is obtained by the series of processes in steps S101 to S103. Changes can be identified.
  • the magnetic element 31 of each detection apparatus 3 which enables such a process is a magnetoresistive element, a Hall element, etc., for example, and can be manufactured in low cost and small size. Therefore, according to the present embodiment, it is possible to provide a low-cost and compact signal processing system capable of performing time-frequency analysis of a signal in real time.
  • the storage unit 52 of the control device 5 stores the correspondence information 521 indicating the correspondence between the frequency of the signal and the information indicated by the signal of the frequency.
  • the signal processing system 1 can specify the content of the information which the received signal shows by said step S104. Therefore, according to the present embodiment, it is possible to realize information communication using various types of signals such as audio signals and ultrasonic signals.
  • FIGS. 5 and 6 schematically illustrate an example of use of the signal processing system 1 according to the present embodiment.
  • FIG. 5 illustrates the scene which performs the ultrasonic flaw detection test of a tunnel using the signal processing system 1 which concerns on this embodiment.
  • ultrasonic waves are emitted toward the wall of the tunnel for searching for defects by a known ultrasonic transmitter (not shown).
  • the time frequency analysis of the reflected wave reflected by the wall surface is performed by the signal processing system 1.
  • the part where there is no defect inside ultrasonic waves are reflected near the bottom.
  • a part of the transmitted ultrasonic wave does not reach near the bottom surface and is reflected at the part of the defect. Therefore, by determining the difference in the reflection by the signal processing system 1, it is possible to investigate whether or not the tunnel is defective.
  • FIG. 6 exemplifies a scene in which information communication by ultrasonic waves is performed between two parties using the signal processing system 1 according to the present embodiment.
  • one user transmits an ultrasonic signal to the other user by the transmitting device 6 configured by a known ultrasonic transmitter or the like.
  • the strength of the component of each frequency of the ultrasonic signal is specified based on the content of the information to be transmitted to the communication partner and the correspondence information 521.
  • the other user performs time-frequency analysis of the ultrasonic signal received from one user using the signal processing system 1 and, based on the correspondence information 521, the content of the information indicated by the received ultrasonic signal. Identify.
  • wireless information communication in water can be implement
  • the control device 5 in order to specify the content of the information indicated by the received signal, holds the correspondence relationship information 521. However, when the content of the information indicated by the received signal is not specified, the correspondence information 521 may be omitted. In this case, the process of step S104 may be omitted.
  • each detection device 3 when the frequency of the received signal is a specific frequency corresponding to the low-pass filter 33, two components of the sum and the difference of the frequency of the current to be analyzed and the frequency of the alternating current It is possible to take out the component of the difference of Thereby, each detection device 3 is configured to be able to specify the strength of the corresponding frequency of the received signal.
  • the configuration of each detection device 3 may not be limited to such an example.
  • Each detection device 3 takes out the component of the sum of the two components of the sum of the frequency of the current to be analyzed and the frequency of the alternating current and the difference when the frequency of the received signal is the corresponding specific frequency, It may be configured to identify the corresponding frequency strength of the received signal.
  • each detection device 3 may include, for example, a band pass filter instead of the low pass filter 33.
  • the band pass filter of each detection device 3 is configured to pass the current of the component of the sum of the frequency of the current to be analyzed and the frequency of the alternating current when the frequency of the received signal is the corresponding specific frequency. . That is, when the frequency of the received signal matches the frequency of the current to be analyzed, the cutoff frequency of the band pass filter of each detection device 3 is the specific frequency of the signal to be analyzed and the alternating current of the current source 32 The value of the sum of the frequency and the frequency is set to be included in the pass band.
  • the cutoff frequencies of the band pass filters of the detection devices 3 may be set to be different or may be set to be identical. If the cutoff frequency of the band pass filter of each detection device 3 is set to be different, if each detection device 3 is configured to be able to specify the strength of the component of the different frequency of the received signal, The current source 32 of each detection device 3 may be configured to output an alternating current of the same frequency.
  • each detection device 3 is configured to detect an alternating current having a frequency that is the difference between the cutoff frequency of the band pass filter and the frequency of the current source 32. It is easier to change the frequency of the current source 32 of each detection device 3 than changing the cutoff frequency of the band pass filter. Therefore, the manufacturing cost of the signal processing system 1 can be suppressed by making the cutoff frequencies of the band pass filters the same and making the frequencies of the current sources 32 of the detection devices 3 different.
  • the cutoff frequency of the band pass filter is the same”
  • a band pass filter which can pass current of the same frequency band although the cutoff frequency of each band pass filter does not completely match Use cases may be included.
  • the current passing through the band pass filter is an alternating current. Therefore, a full-wave rectifying and smoothing circuit or the like may be arranged in the circuit 35 from the viewpoint of the output of the detection result.
  • FIG. 7 schematically illustrates the signal processing system according to the embodiment.
  • a signal processing system including three detection devices was configured.
  • Each detection device was composed of a current source, a magnetic element, a band pass filter, and a full wave rectification and smoothing circuit.
  • the frequency of the current source of each detection device is set to 600 Hz, 500 Hz and 400 Hz, and the band pass filter of each detection device passes frequency components of 1600 Hz.
  • Each detection device was connected to a computer via an analog input / output module or the like, and the computer monitored the operation of each detection device.
  • wires connected to the bipolar power supply are disposed on the magnetic elements of the detection devices.
  • the bipolar power supply was connected to the stereo output terminal of the smartphone. As a result, the voice signal received by the microphone of the smartphone is amplified and output.
  • FIG. 8A shows the result of time frequency analysis of an audio signal received by the microphone of the smartphone.
  • FIG. 8B shows the result of monitoring the output of each detection device by a computer. As shown in FIGS. 8A and 8B, the results of time-frequency analysis of the audio signal coincided with the results of the outputs of the detection devices. This proves that the above signal processing stem can be used for frequency analysis of a signal.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Mathematical Physics (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)

Abstract

Un aspect de la présente invention concerne un système de traitement de signal qui comprend : un dispositif de réception qui reçoit un signal ; et une pluralité de dispositifs de détection qui détecte les composantes des différentes fréquences d'un courant à analyser qui circule vers le dispositif de réception correspondant au signal reçu. Chaque dispositif de détection comprend : un élément magnétique conçu de telle sorte qu'une valeur de résistance change en fonction d'un champ magnétique généré par le courant à analyser ; une source de courant qui délivre un courant alternatif d'une fréquence prédéterminée à l'élément magnétique ; un filtre qui permet à un courant d'une composante de la somme ou de la différence de la fréquence du courant à analyser et de la fréquence prédéterminée de passer si la fréquence du signal est une fréquence spécifique ; et un détecteur qui est placé entre l'élément magnétique et le filtre et qui détecte un courant circulant vers un circuit comprenant l'élément magnétique.
PCT/JP2018/027706 2017-08-15 2018-07-24 Système de traitement de signal et procédé de traitement de signal Ceased WO2019035323A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2019536713A JPWO2019035323A1 (ja) 2017-08-15 2018-07-24 信号処理システム及び信号処理方法

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2017-156843 2017-08-15
JP2017156843 2017-08-15

Publications (1)

Publication Number Publication Date
WO2019035323A1 true WO2019035323A1 (fr) 2019-02-21

Family

ID=65362180

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2018/027706 Ceased WO2019035323A1 (fr) 2017-08-15 2018-07-24 Système de traitement de signal et procédé de traitement de signal

Country Status (2)

Country Link
JP (1) JPWO2019035323A1 (fr)
WO (1) WO2019035323A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116223909A (zh) * 2022-11-18 2023-06-06 南方电网数字电网研究院有限公司 叠加信号的重建方法、装置、服务器和存储介质

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04295772A (ja) * 1991-03-25 1992-10-20 Dx Antenna Co Ltd レベル測定装置
JPH0714388U (ja) * 1993-08-06 1995-03-10 日新電機株式会社 周波数分析装置
US5469148A (en) * 1989-03-20 1995-11-21 Papst Licensing Gmbh Frequency monitoring device
EP1109027A1 (fr) * 1999-12-15 2001-06-20 Gram Corporation Analyse spectrale et procédé d'imagerie de données de series chronologiques d'un organisme vivant
JP2009042105A (ja) * 2007-08-09 2009-02-26 Tdk Corp 磁気デバイス及び周波数検出器
JP2015004573A (ja) * 2013-06-20 2015-01-08 株式会社デンソーウェーブ 周波数解析装置
WO2015056397A1 (fr) * 2013-10-17 2015-04-23 公立大学法人大阪市立大学 Appareil de mesure de courant électrique et procédé de mesure de courant électrique

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5469148A (en) * 1989-03-20 1995-11-21 Papst Licensing Gmbh Frequency monitoring device
JPH04295772A (ja) * 1991-03-25 1992-10-20 Dx Antenna Co Ltd レベル測定装置
JPH0714388U (ja) * 1993-08-06 1995-03-10 日新電機株式会社 周波数分析装置
EP1109027A1 (fr) * 1999-12-15 2001-06-20 Gram Corporation Analyse spectrale et procédé d'imagerie de données de series chronologiques d'un organisme vivant
JP2009042105A (ja) * 2007-08-09 2009-02-26 Tdk Corp 磁気デバイス及び周波数検出器
JP2015004573A (ja) * 2013-06-20 2015-01-08 株式会社デンソーウェーブ 周波数解析装置
WO2015056397A1 (fr) * 2013-10-17 2015-04-23 公立大学法人大阪市立大学 Appareil de mesure de courant électrique et procédé de mesure de courant électrique

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116223909A (zh) * 2022-11-18 2023-06-06 南方电网数字电网研究院有限公司 叠加信号的重建方法、装置、服务器和存储介质
CN116223909B (zh) * 2022-11-18 2023-12-12 南方电网数字电网研究院有限公司 叠加信号的重建方法、装置、服务器和存储介质

Also Published As

Publication number Publication date
JPWO2019035323A1 (ja) 2020-09-03

Similar Documents

Publication Publication Date Title
US10555086B2 (en) Magnetic field canceling audio speakers for use with buried utility locators or other devices
CN113015049B (zh) 开关检测方法、无线耳机、耳机盒及存储介质
US9279784B2 (en) Durability enhanced and redundant embedded sensors
TW201407131A (zh) 具有測量塗覆層厚度功能的電子裝置及測試系統
CN104764973B (zh) 感应式线束检测系统及检测方法
WO2014171475A1 (fr) Appareil de mesure de courant, système de détection de comportement de dispositif, procédé de mesure de courant et programme
US20160277859A1 (en) Method and Device for Detecting Function of Loudspeaker Module
WO2019035323A1 (fr) Système de traitement de signal et procédé de traitement de signal
EP3594636A1 (fr) Capteur d'immersion de liquide
CN105259397A (zh) 电子式电压互感器
KR101358047B1 (ko) 신경 회로망 및 초음파 신호를 이용한 전기설비의 고장 학습 및 판별 장치
CN102735751B (zh) 一种基于无线网络的多功能集成非破坏检测传感器
CN103207239A (zh) 一种一体化可调节磁致伸缩纵向导波探头
CN114152988A (zh) 金属探测装置
KR101333177B1 (ko) 신경 회로망 및 초음파 신호를 이용한 전기설비의 고장 학습 및 판별 방법
CN105676021A (zh) 一种近距离射频开关切换天线的测量设备及方法
CN202748343U (zh) 一种基于无线网络的多功能集成非破坏检测传感器
CN112255452A (zh) 导电物体的功率分析方法、装置、功率传感器和存储介质
CN216561039U (zh) 金属探测装置
CN202916306U (zh) 一种宽频带电流测试卡钳装置
CN204495947U (zh) 感应式线束检测系统
JP2009145056A (ja) 電磁超音波探触子および電磁超音波探傷装置
CN205538831U (zh) 一种探测装置
TWI850511B (zh) 決定物件特性的裝置與系統
CN102944701A (zh) 一种宽频带电流测试卡钳

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 18845966

Country of ref document: EP

Kind code of ref document: A1

ENP Entry into the national phase

Ref document number: 2019536713

Country of ref document: JP

Kind code of ref document: A

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 18845966

Country of ref document: EP

Kind code of ref document: A1