JPWO2016151715A1 - Noise monitoring system - Google Patents

Abstract

An object of the present invention is to provide a noise monitoring system capable of analyzing a noise generation source and a propagation path. A sensor for detecting the operation state of the device, a system control unit for controlling the operation of the device, monitoring the state of the device in response to output information from the sensor, and outputting information when an abnormality of the device is detected; The sensor data output from the noise measurement sensor and the output information from the system control unit when receiving the output information from the noise measurement sensor and the system control unit arranged at a plurality of locations in the device And a processing unit that receives the output information from the detection unit, analyzes a noise generation source and a propagation path based on the output information, and outputs the information, and the processing unit A noise monitoring system, comprising: a display unit that receives output information from the display unit and displays a processing result.

Description

  The present invention relates to a noise monitoring system.

  As background art of this technical field, there is JP-A-6-288873 (Patent Document 1). This gazette states that “the vehicle side or the outside of the vehicle quickly and accurately grasps the location of the vehicle, the content of the failure, etc. The navigation device detects the current position / running situation of the vehicle 2 from the first sensor 8 and the second sensor 9. And the like, and the navigation control unit 4 to which a failure signal and information necessary for failure diagnosis are input from the control units 11 to 13 when the mechanism unit of the vehicle 2 fails, a display screen 6, a memory 10, And when the navigation control unit 4 receives a failure signal from the control units 11 to 13, information necessary for failure diagnosis of the vehicle mechanism unit taken in from the first sensor 8 and the control units 11 to 13 and Is stored in the memory 10 and the failure related information such as the failure location / failure content in the mechanical part of the vehicle 2 is created and displayed on the display screen 6 ”(see summary).

JP-A-6-288873

  For example, an electric railway is driven by electric power supplied via an overhead line and a rail. In addition to electromagnetic noise generated by power converters at substations and electromagnetic noise generated by drive inverters for railway vehicles, these overhead lines and rails are also subject to electromagnetic noise and wheels generated due to separation from the pantograph overhead lines. Various noises such as noise caused by contact with or leaving the rail may be superimposed.

  Depending on these noises, there is a possibility of malfunctioning signal equipment such as sensors inside and outside the railway vehicle, communication equipment, and railroad crossing controllers. It was required to identify and analyze.

  In Patent Document 1, it is possible to grasp the failure content and location of a vehicle, but since it does not have a function of monitoring and analyzing noise that causes failure or malfunction, it is possible to specify the cause of failure. There is a problem that it is difficult and it is difficult to examine countermeasures against noise, and it takes a lot of time and money to take countermeasures.

  Therefore, an object of the present invention is to provide a noise monitoring system capable of analyzing a noise generation source and a propagation path.

  In order to solve the above problems, for example, the configuration described in the claims is adopted. The present application includes a plurality of means for solving the above-described problems. To give an example, a sensor that detects the operation state of the device, controls the operation of the device, and receives output information from the sensor to receive the device. System control unit that monitors the status of the device and outputs information when an abnormality of the device is detected, noise measurement sensors arranged at a plurality of locations in the device, and output information received from the system control unit The sensor data output from the noise measurement sensor and the output information from the system control unit are recorded, the detection unit that outputs the recorded information, the output information from the detection unit is received, and the output information A noise monitor comprising: a processing unit that analyzes and outputs a noise generation source and a propagation path based on the information; and a display unit that receives output information from the processing unit and displays a processing result It is a stem.

  ADVANTAGE OF THE INVENTION According to this invention, the noise monitoring system which can analyze the generation source and propagation path of noise can be provided.

  Problems, configurations, and effects other than those described above will be clarified by the following description of embodiments.

It is the figure which showed the whole structure of the system by Embodiment 1 of this invention. It is the figure which showed the structure of the detection part in the system by Embodiment 1 of this invention. It is the figure which showed the structure of the process part in the system by Embodiment 1 of this invention. It is the figure which showed the storage range of the sensor data with respect to an error flag and vehicle data in the system by Embodiment 1 of this invention. 2 is a flowchart showing a flow of a vehicle noise monitoring system in the system according to the first embodiment of the present invention. It is the figure which showed the whole structure of the system by Embodiment 2 of this invention. It is the figure which showed the structure of the delay process part in the system by Embodiment 2 of this invention. It is the figure which showed the structure of the delay process part in the system by Embodiment 2 of this invention. It is the figure which showed the structure of the process part in the system by Embodiment 3 of this invention. It is the figure which showed the whole structure of the system by Embodiment 4 of this invention. It is the figure which showed the structure of the detection part in the system by Embodiment 4 of this invention. It is the figure which showed the whole structure of the system by Embodiment 5 of this invention. It is the figure which showed the structure of the detection part in the system by Embodiment 5 of this invention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Note that components having the same function are denoted by the same reference symbols throughout the drawings for describing the embodiment, and the repetitive description thereof will be omitted.

  Hereinafter, the noise monitoring system which is Embodiment 1 of this invention is demonstrated using FIGS. In the present embodiment, the form of a noise monitoring system applied to a railway vehicle will be described, but the noise monitoring system of the present invention is not limited to the application and configuration of the present embodiment.

  FIG. 1 is a diagram showing an overall configuration of a system according to the present embodiment. In FIG. 1, a vehicle body 115 that is a noise monitoring target device includes a control unit 114 such as an inverter, an on-board sensor 112 such as an ATC / crossing controller that detects an operation state of the device, and a monitoring target device. The system includes a vehicle system control unit 111 that monitors the control of each on-vehicle device and the status / vehicle operation information, which is a system control unit that monitors control, status, operating environment, and the like.

  The vehicle system control unit 111 includes a control unit 110 that provides a control command (brake / speed control, etc.) of the control unit 114, a receiving unit 108 that receives device data collected from the on-board sensor 112, and A state monitoring unit 109 that monitors the state of each device in the vehicle and confirms whether the device has a malfunction by comparing with a control command.

  When a malfunction occurs in the vehicle equipment, an error flag 109a indicating the occurrence of malfunction is output from the state monitoring unit 109, and in synchronization with this signal, the noise monitoring apparatus 101 measures and records electromagnetic noise and generates and propagates electromagnetic noise. Operate route analysis.

  The noise monitoring device 101 is device data indicating the sensor 102 for measuring electromagnetic noise, the sensor data 102a output from the sensor 102, the error flag 109a output from the state monitoring unit 109, and the operating environment information of the monitoring target device. While constantly monitoring the vehicle data 109b (operation mode, train position, speed, etc.), an error flag indicating the occurrence of malfunction is detected, and sensor data 102a for a certain range of time before and after the occurrence time is detected in synchronization with the malfunction occurrence time. Is recorded together with the vehicle data 109b and the error flag 109a, the processing unit 104 that analyzes the generation source and propagation path of electromagnetic noise based on the recorded data 104a, the image display unit 116 that displays the analysis result, Display of processing data 105a, reading of recording data 104a, and external Composed of input and output unit 105 for inputting constant data 8e.

  FIG. 2 is a diagram showing the configuration of the detection unit 103 in the system according to the embodiment of the present invention. The detection unit 103 performs AD conversion on the sensor data 102a input from the sensor 102, sensor data 201a after conversion, and vehicle data 109b input from the state monitoring unit 109 of the vehicle system control unit 111. The temporary recording memory 203 for storing the error flag 109a input from the same unit, and the sensor data 203a and the vehicle data 203b in the time range specified by the setting data 8e triggered by the error flag 109a for indicating the occurrence of malfunction of the vehicle device And a control unit 206 that performs control to write the error flag 203c into the buffer 204 and the storage recording unit 205, a data storage buffer 204, and a storage recording unit 205.

  The operation of the detection unit 103 will be described below. In the detection unit 103 shown in FIG. 2, the input sensor data 102 a is first AD converted according to the sampling clock 206 d output from the recording control unit 206, and then the vehicle data 109 b and the error flag 109 a are looped to the temporary recording memory 203. Store.

  The recording control unit 206 uses the error flag 109a indicating the occurrence of malfunction as a trigger, and sensor data 203a, vehicle data 203b, and error flag stored in the temporary recording memory 203 only for the time range specified by the recording time setting data 8e. Control of writing 203c into the storage recording unit 205 via the buffer 204 is performed. Control signals 206 a, 206 b and 206 c output from the recording control unit 206 are memory address signals and writing control signals (not shown), and the memory address signals are generated by an address counter in the recording control unit 206.

  FIG. 3 is a diagram showing the configuration of the processing unit in the system according to the first embodiment of the present invention. The processing unit 104 compares the time difference between the comparison processing data 401a and the peak detection unit 401 that extracts the peak (maximum amplitude value) of the recording data 104a at the time of malfunction and the time stored in the storage recording unit 205. A phase detection unit 402, a noise distribution information analysis unit 404, and a sensor position information management unit 403 that provides sensor position information to the analysis unit 404.

  FIG. 4 is a diagram showing a storage range of sensor data and vehicle data for an error flag in the system according to the embodiment of the present invention. In the figure, sensor data 202a after AD conversion, vehicle data 109b, and error flag 109a are shown on the same time axis.

  The example of FIG. 4 shows a case where the sensor data 202a uses three sensors A, B, and C to measure a noise waveform. The sensor data 202a, vehicle data 109b, and error flag 109a are written from the temporary recording memory 203 to the buffer 204 using the rise of the error flag 109a as a trigger (operation timing), and writing to the storage recording unit 205 is started via the buffer 204. .

  The storage range of the sensor data 202a, the vehicle data 202b, and the error flag 202c can be set by the setting data 8e that is a setting value of the recording control unit 206 before and after a malfunction occurs.

  In the example of FIG. 4, t0 and t1 are the operation timings, and d1 and d2 indicate the time before and after the storage range, respectively. Here, d1 and d2 are determined by the setting data 8e. In the figure, the peak values of the sensor data are indicated by VpA, VpB and VpC, respectively, and the times at that time are indicated by tpA, tpB and tpC, respectively. ΔtCA, ΔtCB, and ΔtCt represent the time difference between the peak of sensor C and sensor A, the time difference between the peak of sensor C and sensor B, and the time difference between the peak of sensor C and the operation timing, respectively.

  Next, the operation of the processing unit 104 will be described with reference to FIGS. 3 and 4. For the recording data 104a of the noise waveform input to the processing unit 104, first, the peak value (VpA, VpB and VpC in FIG. 4) and the time at that time (FIG. 4) are obtained from the noise waveform data of each sensor by the peak detection unit 401. 4 tpA, tpB and tpC) are extracted.

  Next, the phase detector 402 detects the time difference at the peak of the noise waveform of each sensor. Further, the detected peak value and time difference are input to the noise distribution information analysis unit 404, and a correlation map between the peak value, time difference, and position of each sensor is obtained using the sensor position matrix provided from the sensor position information management unit 403. (Correlation diagram) is analyzed. From this correlation map, the noise generation source and the propagation path from the noise generation source to the malfunction occurrence location are analyzed.

  In this processing unit, in addition to the processing in the time domain, processing in the frequency domain is also possible by adding an FFT conversion unit. For example, the noise waveform recording data 104a input to the processing unit 104 is first subjected to FFT conversion, and then the peak detection unit 401 can detect the frequency component having the maximum intensity.

  Hereinafter, an outline of the operation of the system according to the present embodiment will be described with reference to FIGS. In FIG. 1, first, electromagnetic noise inside and outside the railway vehicle is constantly measured using the sensor units 102 arranged at a plurality of locations of the vehicle body 115, and the measured waveform data is input to the detection unit 103 as sensor data 102a.

  In addition, it communicates synchronously with the vehicle system control unit 111 mounted on the railway vehicle, and from the state monitoring unit 109, information on the operation environment of the vehicle (operation mode, train position, speed, etc.) and an error signal indicating whether a malfunction has occurred Are input to the detector 103 together with the sensor data 102a as vehicle data 109b and an error flag 109a.

  In the detection unit 103, the input sensor data 102a is AD-converted, and thereafter, the vehicle data 109b and the error flag 109a are always written in the temporary recording memory 203. In addition, sensor data 203a, vehicle data 203b, and error flag 203c stored in the temporary recording memory are written to the storage recording unit 205 via the buffer 204 with the rising edge of the error flag 109a as a trigger. The storage range is determined by the setting data 8e.

  Further, the processing unit 104 compares the electromagnetic noise peaks and the time difference among the plurality of sensors in the recorded data, thereby analyzing the generation source and propagation path of the electromagnetic noise, and writing out to the outside by the input / output unit and the image display unit 116. Is displayed.

  FIG. 5 is a flowchart showing the flow of diagnosis processing in the system according to the embodiment of the present invention. First, in step 601, initial setting such as setting data 8e shown in FIG. 5 is performed. Next, in step 602, the operation of the system is started and noise measurement by the sensor unit 102 is started. Next, in step 603, diagnostic processing in the detection unit 103 or the like is started, and communication with the vehicle system control unit 111 is started, and vehicle data and error flags are collected from the state monitoring unit 109.

  Thereafter, the detection unit executes a loop storing operation of the sensor data after AD conversion at the normal time, the vehicle data and the error flag data from the state monitoring unit to the temporary recording memory. First, the sensor data converted by the AD conversion unit, the vehicle data collected by the state monitoring unit, and the error flag data are stored in a temporary recording memory, and from the top address while incrementing the address counter of the control unit during normal operation. The storage is continued in order (step 604 → step 605 → step 606 → step 607 → step 608).

  When the storage to the last address is completed, the address counter is returned to the head (step 604 → step 605 → step 606 → step 607 → step 609), and the sensor data, vehicle data and error flag data are overwritten from the head address again. Continue (Step 604 → Step 605 → Step 606 → Step 607 → Step 608).

  If the recording controller detects a malfunction during the processing of flow A and an error flag is input to the recording controller, it is determined in step 606 that an error has occurred, and a normal flow A loop is executed. The process proceeds to step 610.

  In step 610, sensor data 203a, vehicle data 203b, and error flag 203c stored in the temporary recording memory are written into the storage recording unit 205 via the buffer 204 in accordance with the control signal of the recording control unit. In step 611, it is determined whether or not a recording completion signal to the storage recording unit has been received. If there is no reception, the process returns to step 610 to continue recording.

  If there is reception, step 612 for transferring the recording data to the processing unit is executed, and the monitoring process is resumed in step 603. In step 613, the noise generation source and the propagation path are analyzed by data processing, written to the outside by the input / output unit, and the analysis result is displayed by the image display unit 116.

  From the above, it is possible to provide a noise monitoring system capable of analyzing a noise generation source and a propagation path.

  Below, the noise monitoring system which is Embodiment 2 of this invention is demonstrated using FIGS. In the present embodiment, a mode in which a problem that noise detection accuracy is lowered when sensor wiring lengths are different will be described.

  FIG. 6 is a diagram showing the configuration of the detection unit in the system according to the present embodiment. The system according to the present embodiment is a system having a configuration of a variation of the detection unit 103 based on the configuration of FIG. 1 described in the first embodiment. Compared to the first embodiment, the detection unit 103 adds a delay processing unit 600.

  In FIG. 6, sensor data 201 a after AD conversion, vehicle data 109 b, and error flag 109 a input to the detection unit 103 are first input to the delay processing unit 600. The delay processing unit 600 adjusts the timing at which the sensor data 201a, the vehicle data 109b, and the error flag 109a are input to the temporary recording memory 203 according to preset delay time data 8f.

  For example, when there is a large difference in the wiring delay time, the delay processing unit 600 can correct the time difference of each data. Thereafter, the detection unit executes a loop storing operation of the sensor data after AD conversion at the normal time, the vehicle data and the error flag data from the state monitoring unit to the temporary recording memory.

  FIG. 7 is a diagram showing a configuration of the delay processing unit 600 in the system according to the embodiment of the present invention. The delay processing unit 600 includes a digital delay circuit 701 for delaying input sensor data 201a, vehicle data 109b and error flag 109a, and a delay setting unit 702 for setting the respective delay time data.

  The delay setting unit 702 sets delay time data in accordance with preset delay time data 8f. Here, the delay time data 8f is a delay time obtained by trying the noise monitoring system of the present invention under the condition that a known noise source is provided.

  Further, the delay processing unit 600 shown in FIG. 7 is applied when using sensors having the same length of wiring. However, when using different lengths of wiring, as shown in FIG. The digital delay circuit 701 can be set.

    From the above, it is possible to provide a noise monitoring system capable of analyzing a noise generation source and a propagation path. Further, when the sensor wiring length is different, the wiring delay can be corrected, and the deterioration of noise detection accuracy due to the wiring delay can be avoided.

  Below, the noise monitoring system which is Embodiment 3 of this invention is demonstrated using FIG. In this embodiment, a mode in which the order and type of processing processes can be freely selected will be described. The system according to the present embodiment is based on the configuration of FIG. 1 described in the first embodiment, and has other variations of the processing unit 104.

  FIG. 9 is a diagram showing a configuration of a processing unit in the system according to the present embodiment. The processing unit stores a phase detection unit 402 that compares the time difference of the recording data 104a at the time of occurrence of malfunction stored in the storage recording unit 205, a peak detection unit 401 that compares the amplitude of the processed data 901a after the comparison, and a noise distribution information analysis unit. 404 and a sensor position information management unit 403 that provides sensor position information to the analysis unit 404.

  This configuration reverses the order of the peak detection unit and the phase detection unit as compared to the first embodiment. In order to specify the noise generation source and propagation path, a peak detection unit and a phase detection unit for comparing the noise intensity and the generation time are required, but the comparison order is not concerned. In addition to the first and third embodiments, the peak detector and the phase detector may be housed in one block.

  From the above, it is possible to provide a noise monitoring system capable of analyzing a noise generation source and a propagation path. Further, when the recording data 104a is processed by the processing unit 104, the processing order of peak detection, phase detection, and noise distribution information analysis is not limited and can be freely selected by the user. Further, by storing the above three processes in one chip, the number of parts and the exclusive area of the processing unit can be reduced.

  Below, the noise monitoring system which is Embodiment 4 of this invention is demonstrated using FIG. 10 and FIG. In the present embodiment, a mode for realizing miniaturization of a noise monitoring system will be described. The system according to the present embodiment is a system based on the configuration of FIG. 1 described in the first embodiment and having a variation configuration of the sensor 102 and the detection unit 103.

  FIG. 10 is a diagram showing the overall configuration of the system according to the present embodiment. As shown in FIG. 10, the sensor 1002 has only the antenna 106.

  FIG. 11 is a diagram showing a configuration of a detection unit in the system according to the present embodiment. Here, the sensor data 102 a input to the detection unit 1003 is amplified by the amplification unit 1111, and then AD conversion is performed as in the first embodiment.

  From the above, it is possible to provide a noise monitoring system that can analyze a noise generation source and a propagation path. In addition, since the sensor includes only the antenna, the sensor can be miniaturized. In addition, since the amplifying units are combined into one instead of plural, it is possible to reduce the chip volume.

  Below, the noise monitoring system which is Embodiment 5 of this invention is demonstrated using FIG. 12 and FIG. In this embodiment, an embodiment in which the increase in the wiring cost and the variation in the wiring delay is reduced in consideration of the increase in the number of wirings in the system will be described.

  The system according to the present embodiment is based on the configuration of FIG. 1 described in the first embodiment, and acquires the error flag 109a and the vehicle data 109b from the state monitoring unit 109 of the vehicle system control unit 111 by a wireless method. It is a system.

  FIG. 12 is a diagram showing the overall configuration of the system according to the present embodiment. This configuration is characterized by a stand-alone noise monitor 1201 having a single sensor 102 for noise measurement and a detection unit 1202 that is linked to the vehicle system control unit 111 in a wireless manner.

  FIG. 13 is a diagram showing a detection unit in the system according to the present embodiment. Compared to the first embodiment, it is characterized by having a single AD conversion unit and a temporary recording memory corresponding to sensor data input from a single sensor.

  In the stand-alone type noise monitor 1201, the error flag 109a and the vehicle data 109b from the state monitoring unit 109 of the vehicle system control unit 111 acquired by the wireless method are stored in the temporary recording memory together with the sensor data input from the sensor 102, and the error Sensor data 203a, vehicle data 203b, and error flag 203c stored in the temporary recording memory are written into the storage recording unit 205 via the buffer 204 with the rise of the flag 109a as a trigger.

  The storage range is determined by the setting data 8e. Thereafter, as in the first embodiment, the processing unit 104 analyzes the electromagnetic noise generation source and propagation path by comparing the amplitude and time difference of the electromagnetic noise between the plurality of sensors in the recorded data, and the input / output unit Export externally and display images. Therefore, the recording data 104a and the setting data 8e may be transmitted by a wireless method.

  From the above, it is possible to provide a noise monitoring system capable of analyzing a noise generation source and a propagation path. Further, according to this configuration, the error flag 109a and the vehicle data 109b can be acquired using the wireless LAN, so that the number of wirings can be reduced and the wiring cost can be reduced.

DESCRIPTION OF SYMBOLS 101 ... Noise monitoring apparatus, 102 ... Sensor, 102a ... Sensor data, 103 ... Detection part, 104 ... Processing part, 104a ... Recording data, 105 ... Input / output part, 105a ... Processing data, 106 ... Antenna, 107 ... Amplification part, DESCRIPTION OF SYMBOLS 108 ... Reception part, 109 ... State monitoring part, 109a ... Vehicle data, 109b ... Error flag, 110 ... Control part, 111 ... Vehicle system control part, 112 ... On-board sensor, 114 ... Control unit, 115 ... Vehicle body, 116 ... Image display unit, 8e ... setting data 201 ... AD conversion unit, 201a ... sensor data, 202a ... sensor data, 202b ... vehicle data, 202c ... error flag, 203 ... temporary recording memory, 203a ... sensor data, 203b ... vehicle data, 203c ... Error flag 204 ... Buffer 204a ... Sensor data 204 ... vehicle data, 204c ... error flag, 205 ... preservation recording unit, 206 ... recording control unit, 206a, 206 b, 206c ... control signal,
401 ... peak detection unit, 401a ... processing data, 402 ... phase detection unit, 403 ... sensor position information management unit, 404 ... noise distribution information analysis unit, 403a ... position data,
600 ... delay processing unit, 701 ... digital delay circuit, 702 ... delay setting unit, 8f ... delay time data,
901a ... processing data,
1002 ... sensor, 1003 ... detection unit, 1111 ... amplification unit,
1201 ... Stand-alone type noise monitor, 1202 ... Detection unit,

Claims (6)

A sensor for detecting the operating state of the device;
A system control unit that controls the operation of the device, receives the output information from the sensor, monitors the state of the device, and outputs information when an abnormality of the device is detected,
Sensors for noise measurement placed at multiple locations in the device,
When the output information from the system control unit is received, the sensor data output from the noise measurement sensor and the output information from the system control unit are recorded, and the detection unit that outputs the recorded information,
A processing unit that receives output information from the detection unit, analyzes a noise generation source and a propagation path based on the output information, and outputs the analysis result;
A display unit that receives output information from the processing unit and displays a processing result;
A noise monitoring system comprising: The noise monitoring system according to claim 1,
Information output from the system control unit is an error flag indicating a malfunction of the device, and device data indicating the operation status of the device,
The monitoring unit, when receiving the error flag, records the sensor data output from the noise measurement sensor, the device data from the system control unit, and the error flag. system. The noise monitoring system according to claim 2,
The detection unit corrects a time difference between the error flag, the sensor data, and the device data when the error flag, the sensor data, and the device data are recorded, so that the sensor data, the device data, and A noise monitoring system, wherein the recording timing of the error flag is synchronized. The noise monitoring system according to claim 2 or 3,
The detection unit records the sensor data and the device data before and after receiving the error flag based on the error flag. The noise monitoring system according to any one of claims 1 to 4,
The detection unit includes a temporary recording memory, and before the sensor data and the device data are recorded in synchronization with the error flag, the sensor data, the device data, and the error flag are always stored in the temporary recording memory. A noise monitoring system characterized by storing. The noise monitoring system according to any one of claims 1 to 5,
The processing unit uses the position information of the sensor for noise measurement based on the sensor data, the device data, and the error flag, compares the amplitude and time difference of the sensor data, and analyzes the noise source and propagation path A noise monitoring system characterized by performing calculations.

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