LKYLEU-TH type ground electronic unit LEU automatic test system

Abstract

An LKYLEU-TH type ground electronic unit LEU automatic test system relates to the railway signal equipment detection application technology field and comprises an industrial control computer, a relay switching module, a programmable power supply, an active transponder, a transponder read-write tool, an oscilloscope, an analog communication module, a load resistor and an external storage server. The industrial control computer is connected with the analog communication module, the analog communication module is connected with the tested ground electronic unit LEU, the industrial control computer is connected with an input terminal of the relay switching module, an output terminal of the relay switching module is connected with the load resistor and the active transponder, and the relay switching module is connected with the tested ground electronic unit LEU. The relay switching module is connected with the oscilloscope. According to the invention, the function and performance test of the LKY.LEU-TH type ground electronic unit LEU in the production process is realized.

Description

Technical Field

[0001] The present invention relates to the technical field of railway signal equipment detection and application, and in particular to an LKY•LEU-TH type ground electronic unit LEU automatic testing system. Background Art

[0002] LKY·LEU-TH type ground electronic unit LEU (hereinafter referred to as LEU) is an important ground signal equipment for contemporary railways. LEU is a key device for transmitting variable message data in the balise system. It is used to transmit variable signal data to the active balise to meet the needs of balise uplink data transmission. LEU itself can monitor the status of the external cable connected to the C interface through the C interface, can identify short circuit and open circuit and other states, and display them with panel lighting. LEU records its own working status information and uploads it to the train control center through the M interface. LEU adopts dual-machine hot standby redundancy.

[0003] At present, the inspection of whether the LEU after manufacturing and debugging is qualified mainly relies on operators to manually connect various simulated loads to the C interface of the LEU under test according to different test items. After the wiring is completed, the industrial control computer is manually operated to set the corresponding communication conditions and check the output message of the LEU or control the instrument to complete the performance test of the C interface. This test method has high requirements on personnel ability, and due to manual operation, the test efficiency is low, and the test results are prone to human intervention. The test data needs to be manually transcribed and filled in the inspection record form, and the electronic data cannot be realized, which is not conducive to data management and production data consistency coordination. Summary of the invention

[0004] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides an automatic testing system for a LKY·LEU-TH type ground electronic unit LEU, which realizes function and performance testing of the LKY·LEU-TH type ground electronic unit LEU during the production process.

[0005] In order to achieve the above object, the main technical solutions adopted by the present invention include: An LKY•LEU-TH type ground electronic unit (LEU) automatic test system includes an industrial control computer, a relay switching module, a programmable power supply, an active transponder, a transponder reading and writing tool, an oscilloscope, an analog communication module, a load resistor, and an external storage server. The industrial control computer is connected to the analog communication module, the analog communication module is connected to the ground electronic unit (LEU) under test, the industrial control computer is connected to the input terminal of the relay switching module, the output terminal of the relay switching module is connected to the load resistor and the active transponder, the relay switching module is connected to the ground electronic unit (LEU) under test, the relay switching module is connected to the oscilloscope, the oscilloscope is connected to the industrial control computer, the industrial control computer is connected to the transponder reading and writing tool, the transponder reading and writing tool reads the active transponder message information, the industrial control computer is connected to the programmable power supply, the programmable power supply is connected to the ground electronic unit (LEU) under test, and the industrial control computer is connected to the external storage server.

[0006] Furthermore, the relay switching module is controlled by an industrial control computer to provide external load conditions for the ground electronic unit LEU under test; the analog communication module is controlled by an industrial control computer to provide external communication conditions for the ground electronic unit LEU under test; the transponder reading and writing tool reads the message information output by the ground electronic unit LEU under test to the active transponder through the space A interface, and uploads the read message information to the industrial control computer; the oscilloscope collects the C interface waveform data of the ground electronic unit LEU under test and uploads it to the industrial control computer; the programmable power supply is controlled by the industrial control computer to adjust the input voltage of the ground electronic unit LEU under test in real time and read back the voltage and current values ​​and upload them to the industrial control computer.

[0007] Furthermore, the industrial control computer also includes checking the test results, filling the test results into a database, and uploading the test data to a control center, and the data automatically generates a test record table and stores it.

[0008] Furthermore, the industrial control computer controls the analog communication module to send the correct message to the ground electronic unit LEU under test, the industrial control computer controls the relay switching module to connect the active transponder to the ground electronic unit LEU under test, and pops up the panel indicator light status of the ground electronic unit LEU under test.

[0009] Furthermore, the industrial control computer controls the analog communication module to send a test message to the ground electronic unit LEU under test, and pops up the status of the panel indicator light of the ground electronic unit LEU under test.

[0010] Furthermore, the industrial control computer controls the relay switching module to connect the load or active transponder to the C-interface signal terminal of the relay switching module, and connects the C-interface terminal of the ground electronic unit LEU under test through the C-interface signal terminal of the relay switching module. The industrial control computer connects the probe of the oscilloscope and reads the C-interface signal; the oscilloscope uploads the collected C-interface waveform data of the ground electronic unit LEU under test to the industrial control computer, and the industrial control computer parses the waveform data, determines the C1 and C6 interface performance indicators of the ground electronic unit LEU under test, and draws an eye diagram.

[0011] Further, the load resistor includes a 25 ohm resistor, a 60 ohm resistor, an 80 ohm resistor, a 120 ohm resistor, a 170 ohm resistor, a 180 ohm resistor, and a 300 ohm resistor.

[0012] Furthermore, the industrial control computer controls the transponder reading and writing tool through the 232 serial port to read the active transponder message in real time, and compares the read message information with the message sent by the industrial control computer controlled analog communication module.

[0013] Furthermore, the industrial control computer controls the program-controlled power supply through the USB serial port, adjusts the input voltage value of the ground electronic unit LEU under test, and the industrial control computer reads the voltage and current data of the program-controlled power supply at regular intervals.

[0014] Furthermore, the industrial control computer reads the recorded data of the ground electronic unit LEU under test, and the industrial control computer makes a judgment on the operation record of the ground electronic unit LEU under test.

[0015] The beneficial effects of the present invention are: 1. Compared with the prior art, the present invention realizes the automatic test of LEU functions and performance, improves the test efficiency and measurement accuracy, and reduces the labor intensity. The test items are automatically executed according to the test sequence without manual intervention, thus significantly shortening the measurement and recording time. The test time can be reduced by more than 1 / 2, avoiding human errors, reducing the labor participation of operators, automatically completing data storage and uploading to the control center, and remote testing can also be performed through the control center; 2. The present invention uses hardware-based closing of the C1 signal or C6 signal of the C interface of the LEU under test to calculate accurate and reliable separate C1 signal performance indicators and C6 signal performance indicators, replacing the existing notch filter, improving the accuracy of the test data, and reducing the cost of the test system; 3. The present invention adopts a closed-loop test mode for message data, simulating the real working state of LEU. The whole process of sending and reading back the message data is controllable and compared by the industrial control computer, which improves the efficiency and accuracy of the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the composition of the LKY•LEU-TH type ground electronic unit LEU automatic test system of the present invention; Figure 2 It is a schematic diagram of the test flow of the test system of the present invention. DETAILED DESCRIPTION

[0017] In order to better explain the present invention and facilitate understanding, the present invention is described in detail below through specific implementation modes in conjunction with the accompanying drawings.

[0018] The invention provides a LKY·LEU-TH type ground electronic unit LEU testing system, which is used to realize automatic testing of the LKY·LEU-TH type ground electronic unit LEU, organize test data, automatically generate test records, automatically complete data storage and upload to a control center.

[0019] like Figure 1 As shown, the present invention provides a LKY·LEU-TH type ground electronic unit LEU test system, including an industrial control computer, a relay switching module, a ground electronic unit LEU to be tested (hereinafter referred to as the tested LEU), a programmable power supply, an active transponder, a transponder reading and writing tool, an oscilloscope, an analog communication module, a variety of load resistors, and an external storage server. The industrial control computer is connected to the analog communication module through a 232 serial port, and the analog communication module is connected to the tested LEU through a 422 interface. The industrial control computer is connected to the input terminal of the relay switching module through an RJ45 interface, the output terminal of the relay switching module is connected to a variety of loads and active transponders, the C interface signal terminal of the relay switching module is connected to the C interface terminal of the tested LEU, and the C interface signal terminal of the relay switching module is connected to the probe of the oscilloscope. The industrial control computer is connected to the transponder reading and writing tool through a 232 serial port, and the transponder reading and writing tool can read the active transponder message information through the space A interface. The industrial control computer is connected to the programmable power supply through a USB serial port, and the programmable power supply is connected to the power port of the tested LEU through a cable. The industrial control computer is connected to the external storage server via the RJ45 interface.

[0020] The relay switching module is controlled by an industrial control computer to provide a variety of external load conditions for the LEU under test. The analog communication module is controlled by an industrial control computer to provide a variety of external communication conditions for the LEU under test; the transponder reading and writing tool reads the message information output by the LEU under test to the active transponder through the space A interface, and uploads the read message information to the industrial control computer for judgment. The oscilloscope collects the C interface waveform data of the LEU under test and uploads it to the industrial control computer for analysis and judgment. The programmable power supply is controlled by an industrial control computer, and the input voltage of the LEU under test is adjusted in real time, and the voltage and current values ​​are read back and judged by the industrial control computer. Finally, the test results are checked by the industrial control computer, all test results are filled in the database, and the test data is uploaded to the control center. The data automatically generates a test record table and stores it.

[0021] The industrial control computer can control the analog communication module through the 232 serial port to send the correct message to the LEU under test. At the same time, the industrial control computer controls the relay switching module through the RJ45 interface to connect the active transponder to the C interface of the LEU, and pops up the status of the LEU panel indicator light for comparison by the inspector. The industrial control computer can control the analog communication module through the 232 serial port to send multiple test messages to the LEU under test. And the status of the LEU panel indicator light pops up for comparison by the inspector.

[0022] The industrial control computer controls the relay switching module through the RJ45 interface, so that any of the multiple loads or the active transponder is connected to the C interface signal terminal of the relay switching module, and the C interface terminal of the LEU under test is connected through the C interface signal terminal of the relay switching module. At the same time, the industrial control computer connects the probe of the oscilloscope and reads the C interface signal. The oscilloscope uploads the collected C interface waveform data of the LEU under test to the industrial control computer, and the industrial control computer analyzes the waveform data, judges the C1 and C6 interface performance indicators of the LEU under test, and draws an eye diagram. Specifically, the multiple load resistors include 25 ohm resistors, 60 ohm resistors, 80 ohm resistors, 120 ohm resistors, 170 ohm resistors, 180 ohm resistors, and 300 ohm resistors.

[0023] The industrial control computer controls the transponder reading and writing tool through the 232 serial port to read the active transponder message in real time, and compares the read message information with the message sent by the industrial control computer controlled analog communication module.

[0024] The industrial control computer controls the program-controlled power supply through the USB serial port to adjust the input voltage value of the LEU under test. The industrial control computer reads the voltage and current data of the program-controlled power supply at regular intervals.

[0025] The industrial control computer can read the recorded data of the LEU device under test through the USB port via the U disk, and copy the recorded data to the industrial control computer. The industrial control computer can make judgments on the LEU operation records of the device under test.

[0026] The industrial control computer can change its own judgment parameters and the content of the message sent by modifying the configuration. During the test, except for some board indicator lights that require manual observation, the rest of the test items can automatically complete the test and judgment. The industrial control computer interface displays the current test results and test progress in real time. After the test is completed, the test record is automatically generated and stored in the specified path.

[0027] As an embodiment, the model of the relay switching module of the present invention may be ZS-DO-R-5A-48-RJ45, the model of the programmable power supply may be DP832A, the model of the active transponder may be TDY.Y, the model of the transponder reading and writing tool may be DYB.DX-I, the model of the oscilloscope may be DPO3032, and the model of the analog communication module may be LKY.BEPT2-TH.

[0028] The present invention simulates the real working state of the LEU and realizes the test of the function and performance of the LEU.

[0029] The specific implementation method is as follows: like Figure 2 As shown, when the test interface is opened, log in to the inspector's personal account, select the configuration type of the LEU to be tested, use a barcode scanner to enter the barcode of the LEU whole machine and the barcode of the individual board, and the industrial control computer distinguishes between redundancy and single and double sets by the barcode number of the LEU whole machine to be tested. Click to configure the system time, the industrial control computer turns on the program-controlled power output, supplies power to the LEU device to be tested, and recalibrates the LEU time to be tested. Click Start Test to start the test sequence.

[0030] The first item is the initial appearance light position inspection test controlled by the industrial control computer, which checks the initial light position status of the LEU under test after power-on. The industrial control computer controls the analog communication module through the 232 serial port to send the correct message to the LEU under test. At the same time, the industrial control computer controls the relay switching module through the RJ45 interface to connect the active transponder to the C interface of the LEU. The inspector checks the light position status on the panel of the LEU under test and compares it with the correct light position status given by the industrial control computer interface. After the comparison is consistent, the next test is carried out.

[0031] The second item is the communication function and light position inspection test. The industrial control computer can control the analog communication module through the 232 serial port to send a variety of test messages to the LEU under test. The industrial control computer controls the relay switching module through the RJ45 port, connects the active transponder to the C interface of the LEU under test, and the industrial control computer controls the transponder reading and writing tool through the 232 serial port to read the active transponder message in real time, and compares the read message information with the message sent by the industrial control computer control analog communication module. If the message information is consistent, the communication is normal, otherwise it is abnormal. The comparison results are displayed. After the comparison, the light position inspection test is carried out. The industrial control computer displays the correct panel indicator light status of the LEU under test. The inspector checks the panel indicator light position status of the LEU under test and compares it with the correct light position status given by the industrial control computer interface before proceeding to the next test.

[0032] The third open-short circuit test, the industrial control computer controls the relay switching module through the RJ45 port, and connects the C interface of the LEU under test to a 25 ohm resistor, a 60 ohm resistor, a 120 ohm resistor, and a 300 ohm resistor respectively. The industrial control computer controls the oscilloscope to collect the C interface data of the LEU under test. When the oscilloscope collects continuous waveform data, it is a normal connection. When the waveform data cannot be detected, it is an open circuit. When the waveform data is detected to be discontinuous, it is a short circuit. At the same time, the inspector is prompted to check the status of the relevant light positions of the LEU board under test. When the OPEN light of the panel indicator of the MDRB board of the LEU device under test is red alone, it is an open circuit, and when the SHORT light is red alone, it is a short circuit. When both are lit at the same time, it is normal.

[0033] The fourth item is the switching function test. The industrial control computer only sends A message information to the I series device of the LEU under test through the analog communication module. At the same time, the industrial control computer reads the active transponder message by controlling the transponder reading and writing tool, and compares the read message content with the A message information content sent to the LEU under test. If the two are consistent, the communication is normal. After the test is normal, the industrial control computer sends B message information to the II series device of the LEU under test through the analog communication module. At the same time, the industrial control computer reads the active transponder message by controlling the transponder reading and writing tool, and compares the read message content with the B message information content sent to the LEU under test. If the two are consistent, the switching function of the LEU under test is normal, otherwise the switching function fails. The I series equipment and II series equipment of the LEU under test are existing technologies, which are used as backup for each other.

[0034] The fifth C interface performance test, the industrial control computer controls the relay switching module to connect the C interface of the LEU under test to a 120 ohm resistor and an oscilloscope, read the oscilloscope data, extract the peak-to-peak value of the oscilloscope data to obtain the C1 interface amplitude of the C interface, and determine whether the C1 interface amplitude is within the range of 14Vpp~18Vpp. The number of complete DBPL code waveforms in the oscilloscope data is extracted to obtain the C1 interface data rate, and determine whether the C1 interface data rate is within the range of 564.48kbit / s±200ppm. According to the requirements for LEU eye diagram parameters in TB / T 3485-2017 "Technical Conditions for Transmitter Transmission Systems", the eye diagram boundary range is extracted from the oscilloscope data, and whether there is an intrusion point. After the C1 test is completed, the relay switching module connects the C interface of the LEU under test to a 170 ohm resistor and an oscilloscope, extracts the peak-to-peak value of the oscilloscope data to obtain the C6 interface amplitude of the C interface, and determines whether the C6 interface amplitude is within the range of 20Vpp~23Vpp. The number of complete sine waveforms in the oscilloscope data is extracted to obtain the C6 interface frequency, and it is determined whether the C6 interface frequency is within the range of 8.82kHz±0.1kHz. The extracted oscilloscope data is decomposed by Fourier series to obtain the second harmonic, and it is determined whether the second harmonic is less than -20dBc.

[0035] The sixth item is the output message test. The industrial control computer sends four messages A, B, C, and D to the LEU under test through the analog communication module, so that the 4 channels (1, 2, 3, and 4) of the C interface of the LEU under test output the message information A, B, C, and D respectively. The industrial control computer controls the relay switching module to connect the active transponder to the first channel of the C interface output of the LEU under test, and reads the active transponder message by controlling the transponder reading and writing tool. The read message content is compared with the A message information content sent to the LEU under test. If the two are consistent, the output message is normal. Then the industrial control computer controls the relay switching module to connect the active transponder to the second channel of the C interface output of the LEU under test, and reads the active transponder message by controlling the transponder reading and writing tool. The read message content is compared with the B message information content sent to the LEU under test. If the two are consistent, the output message is normal. Then the industrial control computer controls the relay switching module to connect the active transponder to the 3rd output of the C interface of the LEU under test, and reads the active transponder message by controlling the transponder reading and writing tool, and compares the read message content with the C message information content sent to the LEU under test. If the two are consistent, the output message is normal. Then the industrial control computer controls the relay switching module to connect the active transponder to the 4th output of the C interface of the LEU under test, and reads the active transponder message by controlling the transponder reading and writing tool, and compares the read message content with the D message information content sent to the LEU under test. If the two are consistent, the output message is normal. When all the above tests pass.

[0036] The seventh item is the recording function test. Use a USB flash drive to read the recorded data of the LEU device under test through the USB port, and copy the recorded data to the industrial control computer. The industrial control computer reads the recorded files stored inside the LEU under test, extracts the relevant recorded content, and compares it with the operation time and content of the first six test items to determine whether the recording function of the LEU under test is normal. The judgment standard is to compare the operation time of the query record with the time during the actual test, and the error between the two is considered qualified within 30S. At the same time, the C interface signal of the recording board is judged, and the judgment standard is: the amplitude of the C1 signal is 14V~18V, and the data rate of the C1 signal is 564.48kbit / s±200ppm. The frequency of the C6 signal is 8.82kHz±0.1kHz, and the amplitude of the C6 signal is 20Vpp~23Vpp.

[0037] After completing the above tests, the program-controlled power supply is controlled to turn off the output. All test results are entered into the database, and the test data is uploaded to the control center. The data automatically generates a test record table and is stored.

[0038] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. Alterations, modifications, substitutions and variations of the above embodiments by a person skilled in the art are all within the scope of the present invention.

Claims

1. An LKY•LEU-TH type ground electronic unit LEU automatic test system, characterized by: It includes an industrial control computer, a relay switching module, a programmable power supply, an active transponder, a transponder reading and writing tool, an oscilloscope, an analog communication module, a load resistor, and an external storage server. The industrial control computer is connected to the analog communication module, the analog communication module is connected to the ground electronic unit LEU under test, the industrial control computer is connected to the input terminal of the relay switching module, the output terminal of the relay switching module is connected to the load resistor and the active transponder, the relay switching module is connected to the ground electronic unit LEU under test, the relay switching module is connected to the oscilloscope, the oscilloscope is connected to the industrial control computer, the industrial control computer is connected to the transponder reading and writing tool, the transponder reading and writing tool reads the active transponder message information, the industrial control computer is connected to the programmable power supply, the programmable power supply is connected to the ground electronic unit LEU under test, and the industrial control computer is connected to the external storage server.

2. The LKY•LEU-TH type ground electronic unit LEU automatic test system according to claim 1 is characterized by: The relay switching module is controlled by an industrial control computer to provide external load conditions for the ground electronic unit LEU under test; the analog communication module is controlled by an industrial control computer to provide external communication conditions for the ground electronic unit LEU under test; the transponder reading and writing tool reads the message information output by the ground electronic unit LEU under test to the active transponder through the space A interface, and uploads the read message information to the industrial control computer; the oscilloscope collects the C interface waveform data of the ground electronic unit LEU under test and uploads it to the industrial control computer; the programmable power supply is controlled by the industrial control computer, adjusts the input voltage of the ground electronic unit LEU under test in real time, and reads back the voltage and current values ​​and uploads them to the industrial control computer.

3. The LKY•LEU-TH type ground electronic unit LEU automatic test system according to claim 2 is characterized by: The industrial control computer also includes checking the test results, filling the test results into a database, and uploading the test data to a control center. The data automatically generates a test record table and stores it.

4. The LKY•LEU-TH type ground electronic unit LEU automatic test system according to claim 1, characterized in that: The industrial control computer controls the analog communication module to send the correct message to the ground electronic unit LEU under test, and the industrial control computer controls the relay switching module to connect the active transponder to the ground electronic unit LEU under test, and pops up the panel indicator light status of the ground electronic unit LEU under test.

5. The LKY•LEU-TH type ground electronic unit LEU automatic test system according to claim 1, characterized in that: The industrial control computer controls the analog communication module to send a test message to the ground electronic unit LEU under test, and pops up the status of the panel indicator light of the ground electronic unit LEU under test.

6. The LKY•LEU-TH type ground electronic unit LEU automatic test system according to claim 1, characterized in that: The industrial control computer controls the relay switching module to connect the load or active transponder to the C-interface signal terminal of the relay switching module, and connects the C-interface terminal of the ground electronic unit LEU under test through the C-interface signal terminal of the relay switching module. The industrial control computer connects the probe of the oscilloscope and reads the C-interface signal; the oscilloscope uploads the collected C-interface waveform data of the ground electronic unit LEU under test to the industrial control computer, and the industrial control computer parses the waveform data, determines the C1 and C6 interface performance indicators of the ground electronic unit LEU under test, and draws an eye diagram.

7. The LKY•LEU-TH type ground electronic unit LEU automatic test system according to claim 1, characterized in that: The load resistors include a 25 ohm resistor, a 60 ohm resistor, an 80 ohm resistor, a 120 ohm resistor, a 170 ohm resistor, a 180 ohm resistor, and a 300 ohm resistor.

8. The LKY•LEU-TH type ground electronic unit LEU automatic test system according to claim 1, characterized in that: The industrial control computer controls the transponder reading and writing tool through the 232 serial port to read the active transponder message in real time, and compares the read message information with the message sent by the industrial control computer controlled analog communication module.

9. The LKY•LEU-TH type ground electronic unit LEU automatic test system according to claim 1, characterized in that: The industrial control computer controls the program-controlled power supply through the USB serial port, adjusts the input voltage value of the ground electronic unit LEU under test, and the industrial control computer reads the voltage and current data of the program-controlled power supply at regular intervals.

10. The LKY•LEU-TH type ground electronic unit LEU automatic test system according to claim 1, characterized in that: The industrial control computer reads the recorded data of the tested ground electronic unit LEU, and the industrial control computer makes a judgment on the operation record of the tested ground electronic unit LEU.

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