CN114113840A - Automatic detection system of signal module of vehicle-mounted contact network detection system - Google Patents
Automatic detection system of signal module of vehicle-mounted contact network detection system Download PDFInfo
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- CN114113840A CN114113840A CN202111364388.XA CN202111364388A CN114113840A CN 114113840 A CN114113840 A CN 114113840A CN 202111364388 A CN202111364388 A CN 202111364388A CN 114113840 A CN114113840 A CN 114113840A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/005—Testing of electric installations on transport means
- G01R31/006—Testing of electric installations on transport means on road vehicles, e.g. automobiles or trucks
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K13/00—Thermometers specially adapted for specific purposes
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/005—Testing of electric installations on transport means
- G01R31/008—Testing of electric installations on transport means on air- or spacecraft, railway rolling stock or sea-going vessels
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/06—Testing, supervising or monitoring using simulated traffic
Abstract
The invention discloses a signal module automatic detection system of a vehicle-mounted contact network detection system, which relates to the technical field of contact network detection.
Description
Technical Field
The invention relates to the technical field of contact network detection, in particular to an automatic detection system for a signal module of a vehicle-mounted contact network detection system.
Background
A signal module of the vehicle-mounted contact network detection system is an important component of signal management, and is mainly responsible for the work of power supply, synchronous signal, heat dissipation system management and the like of an image acquisition unit, and is also responsible for the work of ambient temperature acquisition, base station positioning information interaction, synchronous light supplement control of a light supplement lamp, power management of a guide module and a 4G module and the like; for a signal module, a traditional detection method generally tests and confirms function items manually item by item, various instrument and equipment such as an oscilloscope, a signal generator, an electronic charge, a debugging power supply, equipment peripherals and the like need to be prepared before testing, the complete function testing time period is long, and the professional requirement on quality control personnel is high. If the detection process is overlooked, a certain amount of economic loss and indirect potential safety hazard are probably caused. Therefore, there is a need for an automatic detection technique for signal modules, which can fully cover hardware circuits and software functional items and can complete measurement and detection tasks in a short period.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides an automatic signal module detection system of a vehicle-mounted contact network detection system, which comprises the following contents:
a signal generation module: the device is used for sending a test signal to the tested device;
the signal acquisition module: the device is used for acquiring signals sent by the detected equipment after receiving the test signals;
a temperature calibration module: the calibration coefficient is calculated according to the loaded running temperature of the detected equipment;
a judging module: the device is used for storing the pre-stored signal and judging whether the difference exists between the acquired signal and the pre-stored signal;
the main control module: the system is used for controlling and managing the actions of all modules in the system and transmitting signals;
a simulation load module: the load is used for simulating the connection of the detected equipment under the working condition;
an error elimination module: the error elimination module is used for eliminating the amplification factor deviation of the acquired signal;
a base station positioning module: the base station positioning module is used for analyzing the response condition between the detected equipment and the simulation base station;
the detected equipment is connected with the signal generating module, the signal collecting module, the simulation load module and the temperature calibrating module, and the signal generating module, the signal collecting module, the judging module, the load simulating module, the error eliminating module, the base station positioning module and the temperature calibrating module are all connected with the main control module.
Preferably, the device further comprises an analog-to-digital converter, wherein the analog-to-digital converter is used for converting analog signals acquired by the signal acquisition module into digital signals, and the analog-to-digital converter is connected with the signal acquisition and analysis module and the main control module.
Preferably, the intelligent control system further comprises a human-computer interaction module which is an indicator lamp, the indicator lamp acts according to a signal sent by the main control module, and the indicator lamp is connected with the main control module.
Preferably, the system further comprises a power module, a network access detection module and an information configuration module, wherein the power module is used for supplying power to the detected equipment, the network access detection module is used for detecting whether the signal module successfully establishes network connection with the detected equipment, the information configuration module is used for configuring IP information to the signal module according to the serial number of the detected equipment, the power module is connected with the detected equipment and the main control module, and the network access detection module and the information configuration module are both connected with the main control module.
Preferably, the device further comprises an ethernet module, the ethernet module is used for debugging the sending signal and demodulating the collected signal, and the ethernet module is connected with the main control module, the analog-to-digital converter and the signal generating module.
A signal module automatic detection method of a vehicle-mounted contact network detection system comprises the following steps:
s1: the signal module is in serial port connection with the detected equipment, and after network connection is successfully established, the matching module configures IP (Internet protocol) for the signal module according to the serial number of the detected equipment;
s2: the power supply module supplies power to the detected equipment, firstly collects the no-load ripple signal of the detected equipment, then accesses the analog load module, and collects the load ripple signal of the detected equipment;
s3: the acquisition signal is analyzed and processed to generate a result signal, and the indicator light acts according to the result signal.
Preferably, the step S3 further includes the steps of:
s31: the error elimination module is used for calibrating the acquired signals and eliminating the amplification factor deviation, and the judgment module is used for judging and comparing the acquired signals after the errors are eliminated with prestored signals to generate comparison result signals; the temperature calibration module calculates a calibration coefficient according to the loaded running temperature of the detected equipment to obtain a calculation result signal;
s32: and the indicator light acts according to the comparison result signal and the calculation result signal.
Preferably, the step S3 further includes the steps of:
s33: the judging module judges whether the acquired signal is different from a prestored signal or not to generate a judging result signal; the simulation load module simulates a base station to send a base station information query request to the detected equipment, and the base station positioning module acquires the response condition between the detected equipment and the simulation base station and generates a response result signal;
s34: and the indicator lamp acts according to the response result signal and the judgment result signal.
The invention has the beneficial effects that:
by means of the method for simulating the peripheral equipment, different working environments of the detected equipment can be simulated through the simulated load module, signals sent by the detected equipment under different working environments are acquired and then analyzed, comprehensive coverage detection and digital analysis are achieved, the detection environment of the detected equipment is simplified, the detection operation difficulty is reduced, different detection results are prompted through the indicating lamp after detection is completed, detection time is greatly shortened, detection convenience and detection quality are improved, and the comprehensiveness and stability of detection can be effectively guaranteed.
Drawings
Fig. 1 shows a schematic diagram of a signal module automated detection system of a vehicle-mounted catenary detection system;
fig. 2 shows a flow chart of a signal module automatic detection method of a vehicle-mounted catenary detection system;
fig. 3 shows a simulation diagram of a signal acquired by a signal module automatic detection system of a vehicle-mounted contact network detection system.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to fig. 1 to 3 of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, but not all embodiments. All other implementations made by those of ordinary skill in the art based on the embodiments of the present invention are obtained without inventive efforts.
In the description of the present invention, it is to be understood that the terms "counterclockwise", "clockwise", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used for convenience of description only, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be considered as limiting.
As shown in fig. 1, a signal module automatic detection system of a vehicle-mounted contact network detection system includes the following contents:
a signal generation module: the device is used for sending a test signal to the tested device;
the signal acquisition module: the device is used for acquiring signals sent by the detected equipment after receiving the test signals;
a temperature calibration module: the calibration coefficient is calculated according to the loaded running temperature of the detected equipment;
a judging module: the device is used for storing the pre-stored signal and judging whether the difference exists between the acquired signal and the pre-stored signal;
the main control module: the system is used for controlling and managing the actions of all modules in the system and transmitting signals;
a simulation load module: the load is used for simulating the connection of the detected equipment under the working condition;
an error elimination module: the error elimination module is used for eliminating the amplification factor deviation of the acquired signal;
a base station positioning module: the base station positioning module is used for analyzing the response condition between the detected equipment and the simulation base station;
the detected equipment is connected with the signal generating module, the signal collecting module, the simulation load module and the temperature calibrating module, and the signal generating module, the signal collecting module, the judging module, the load simulating module, the error eliminating module, the base station positioning module and the temperature calibrating module are all connected with the main control module.
After the signal acquisition module acquires a signal sent by the detected equipment, the signal acquisition module can transmit the signal to the oscilloscope for signal display; before adding the analog load, signal acquisition is carried out after the signal is stabilized, the acquired signal is a no-load ripple value and then is connected to the load module, signal acquisition is carried out after the signal is stabilized, and the acquired signal is a loaded ripple signal.
As shown in fig. 1, the device further includes an analog-to-digital converter, where the analog-to-digital converter is configured to convert an analog signal acquired by the signal acquisition module into a digital signal, and the analog-to-digital converter is connected to the signal acquisition and analysis module and the main control module.
As shown in fig. 1, the mobile terminal further includes a human-computer interaction module, the human-computer interaction module is an indicator light, the indicator light acts according to a signal sent by the main control module, and the indicator light is connected with the main control module.
The man-machine interaction module still is provided with the button, the encoder, external equipment interface, a display screen, loudspeaker, the button is used for operating personnel to carry out the function to each module in the system and controls, the encoder is used for supplementary key input function, external equipment interface can be the UBS interface, one or more in the bluetooth interface, operating personnel accessible external equipment derives the test report, the display screen can show information and fault code in detection function and the testing process, the pilot lamp passes through the traffic lights electric quantity condition and confirms the testing result, loudspeaker are arranged in the testing process and send voice prompt signal.
As shown in fig. 1, the system specifically includes a power module, a network access detection module, and an information configuration module, where the power module is configured to supply power to the detected device, the network access detection module is configured to detect whether the signal module successfully establishes network connection with the detected device, the information configuration module is configured to configure IP information to the signal module according to the serial number of the detected device, the power module is connected to the detected device and the main control module, and both the network access detection module and the information configuration module are connected to the main control module.
The information configuration module also configures the port number of the information configuration module, the subnet mask, the gateway, the baud rate, the target IP and the target port number to the signal module according to the serial number of the detected equipment; the detected equipment is a carriage, a panoramic camera, an auxiliary camera, a defense guide module and a standby module are arranged on the carriage, a power supply module sequentially switches on and off the power supply to the panoramic camera, the auxiliary camera, the defense guide module and the standby module, and whether a control result corresponds to the detected equipment is judged by using data collected by an analog-to-digital converter.
As shown in fig. 1, the wireless communication device further includes an ethernet module, the ethernet module is configured to debug a transmission signal and demodulate an acquisition signal, and the ethernet module is connected to the main control module, the analog-to-digital converter, and the signal generation module.
As shown in fig. 2, a method for automatically detecting a signal module of a vehicle-mounted catenary detection system includes the following steps:
s1: the signal module is in serial port connection with the detected equipment, and after network connection is successfully established, the matching module configures IP (Internet protocol) for the signal module according to the serial number of the detected equipment;
s2: the power supply module supplies power to the detected equipment, firstly collects the no-load ripple signal of the detected equipment, then accesses the analog load module, and collects the load ripple signal of the detected equipment;
s3: the acquisition signal is analyzed and processed to generate a result signal, and the indicator light acts according to the result signal.
After the serial port is successfully connected, the network access module firstly carries out network search to detect whether the signal module successfully establishes network connection with the detected equipment, and if the network access detection module detects that the signal module does not establish network connection with the detected equipment, the signal module terminates subsequent detection and sends fault information; after the power supply module is connected with a panoramic camera, an auxiliary camera, a satellite guide module and a standby module of the detected equipment for power supply, the signal generating module sends a periodic signal with 50Hz frequency and positive pulse width of 3ms to the detected equipment, the signal is a pre-stored signal, and the signal receiving module receives a synchronous signal returned by the detected equipment.
Specifically, the step S3 further includes the following steps:
s31: the error elimination module is used for calibrating the acquired signals and eliminating the amplification factor deviation, and the judgment module is used for judging and comparing the acquired signals after the errors are eliminated with prestored signals to generate comparison result signals; the temperature calibration module calculates a calibration coefficient according to the loaded running temperature of the detected equipment to obtain a calculation result signal;
s32: and the indicator light acts according to the comparison result signal and the calculation result signal.
Because the signal module adopts platinum resistor + operational amplifier signal amplification, component precision error exists in the process, and finally amplification factor deviation can be caused, so that an error elimination module is required to calibrate and eliminate errors; before the temperature calibration module calibrates, the calibration coefficient before the temperature calibration module is cleared, then the temperatures of the high-precision resistors 1K and 1.2K are respectively switched into the equipment to be tested and correspond to 0 ℃ and 51.5 ℃, and the calibration coefficient is calculated according to the deviation value.
Specifically, the step S3 further includes the following steps:
s33: the judging module judges whether the acquired signal is different from a prestored signal or not to generate a judging result signal; the simulation load module simulates a base station to send a base station information query request to the detected equipment, and the base station positioning module acquires the response condition between the detected equipment and the simulation base station and generates a response result signal;
s34: and the indicator lamp acts according to the response result signal and the judgment result signal.
The judging module judges whether the detected synchronous signal is different from a prestored signal or not; the base station positioning module firstly inquires version information through the connected serial port, confirms that a serial port physical link is normal, then simulates a load module to simulate a satellite guide unit to inquire base station information, and judges a test result according to a response condition, wherein the response condition comprises the following steps: judging the fault when the information is not received within 10 seconds, the information is checked to be wrong, and the latitude in the information is not in China;
in the aspect of signal analysis, a signal analysis method in multiple modes is adopted: signal effective value, ripple (peak-to-peak value), positive pulse width, period value. Because the period of the signal to be analyzed is 12.5-50 Hz, the ripple frequency of the power supply is less than fcLess than or equal to 12.5KHz, according to the Nyquist relation fsIs more than or equal to 25KHz, and the sampling rate of 25KHz is adopted. The minimum frequency is 12.5Hz, which is converted into a period of 80 ms. So that at least a sampling time greater than 2 cycles ensures that there is at least one complete cycle of waveform data in the buffer.
Effective value of signal:
the ripple value is as follows: traversing the whole cache array to find the most value Amax、AminCalculating the peak-to-peak value Vpp＝Vmax-Vmin
Positive pulse width: searching from the earliest data in the buffer area, firstly searching for a rising edge, and recording a data number N when the rising edge is found1Then searching for a falling edge and finding a post-recording data number N2Thus a positive pulse width T1＝(N2-N1) X 40 us. The searching mode of the rising edge and the falling edge adopts a threshold value comparison method, when the rising edge is acquired due to the fact that the signal has the noise problem, the next signal is possibly lower than the threshold value again and is mistakenly identified as the falling edge, therefore, a double-threshold value mode is adopted, and the threshold value of the rising edge is adopted
Falling edge threshold of
This effectively avoids noise interference.
Period value:searching from the earliest data in the buffer area, firstly searching for a rising edge, and recording a data number N when the rising edge is found1Then find the falling edge, then continue to find the rising edge, data number N when finding the rising edge2Whereby the period value T is equal to (N)2-N1) X 40 us; the same anti-noise mode as the positive pulse width is used, when a rising edge is acquired due to the noise problem of the signal, the next signal is probably lower than the threshold value and is mistakenly identified as a falling edge, so the double-threshold mode is adopted, and the rising edge threshold value is adopted
The falling edge threshold is
Thus, noise interference can be effectively avoided.
Claims (8)
1. The utility model provides an automatic detecting system of signal module of on-vehicle contact net detecting system, is including being examined equipment, its characterized in that includes following content:
a signal generation module: the device is used for sending a test signal to the tested device;
the signal acquisition module: the device is used for acquiring signals sent by the detected equipment after receiving the test signals;
a temperature calibration module: the calibration coefficient is calculated according to the loaded running temperature of the detected equipment;
a judging module: the device is used for storing the pre-stored signal and judging whether the difference exists between the acquired signal and the pre-stored signal;
the main control module: the system is used for controlling and managing the actions of all modules in the system and transmitting signals;
a simulation load module: the load is used for simulating the connection of the detected equipment under the working condition;
an error elimination module: the error elimination module is used for eliminating the amplification factor deviation of the acquired signal;
a base station positioning module: the base station positioning module is used for analyzing the response condition between the detected equipment and the simulation base station;
the detected equipment is connected with the signal generating module, the signal collecting module, the simulation load module and the temperature calibrating module, and the signal generating module, the signal collecting module, the judging module, the load simulating module, the error eliminating module, the base station positioning module and the temperature calibrating module are all connected with the main control module.
2. The automatic detection system for the signal module of the vehicle-mounted contact network detection system according to claim 1, further comprising an analog-to-digital converter, wherein the analog-to-digital converter is used for converting analog signals collected by the signal collection module into digital signals, and the analog-to-digital converter is connected with the signal collection and analysis module and the main control module.
3. The automatic detection system of signal module of on-vehicle contact net detecting system of claim 1, characterized by further comprising a human-computer interaction module, the human-computer interaction module is an indicator lamp, the indicator lamp acts according to the signal that main control module sent, the indicator lamp with the main control module is connected.
4. The system of claim 1, further comprising a power module, a network access detection module, and an information configuration module, wherein the power module is configured to supply power to the device to be tested, the network access detection module is configured to detect whether the signal module successfully establishes network connection with the device to be tested, the information configuration module is configured to configure IP information to the signal module according to the serial number of the device to be tested, the power module is connected to the device to be tested and the main control module, and the network access detection module and the information configuration module are both connected to the main control module.
5. The automatic signal module detection system of the vehicle-mounted contact network detection system according to claim 1, further comprising an ethernet module, wherein the ethernet module is used for debugging a transmission signal and demodulating a collected signal, and the ethernet module is connected to the main control module, the analog-to-digital converter and the signal generation module.
6. An automatic detection method for a signal module of a vehicle-mounted contact network detection system, which is characterized by comprising the automatic detection system for the signal module of the vehicle-mounted contact network detection system of claims 1 to 5, and comprises the following contents:
s1: the signal module is in serial port connection with the detected equipment, and after network connection is successfully established, the matching module configures IP (Internet protocol) for the signal module according to the serial number of the detected equipment;
s2: the power supply module supplies power to the detected equipment, firstly collects the no-load ripple signal of the detected equipment, then accesses the analog load module, and collects the load ripple signal of the detected equipment;
s3: the acquisition signal is analyzed and processed to generate a result signal, and the indicator light acts according to the result signal.
7. The automatic detection system for the signal module of the vehicle-mounted contact network detection system according to claim 6, wherein the step S3 further comprises the steps of:
s31: the error elimination module is used for calibrating the acquired signals and eliminating the amplification factor deviation, and the judgment module is used for judging and comparing the acquired signals after the errors are eliminated with prestored signals to generate comparison result signals; the temperature calibration module calculates a calibration coefficient according to the loaded running temperature of the detected equipment to obtain a calculation result signal;
s32: and the indicator light acts according to the comparison result signal and the calculation result signal.
8. The automatic detection system for the signal module of the vehicle-mounted contact network detection system according to claim 6, wherein the step S3 further comprises the steps of:
s33: the judging module judges whether the acquired signal is different from a prestored signal or not to generate a judging result signal; the simulation load module simulates a base station to send a base station information query request to the detected equipment, and the base station positioning module acquires the response condition between the detected equipment and the simulation base station and generates a response result signal;
s34: and the indicator lamp acts according to the response result signal and the judgment result signal.
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