ZPW-2000A track circuit system transmitter troubleshooting method

Abstract

The invention discloses a method for troubleshooting a transmitter of a ZPW-2000A track circuit system, which comprises the following steps of: judging the state of a transmitter indicator lamp on an acquisition attenuator panel, and judging whether the transmitter has a fault or not; whether a digital circuit board of the transmitter has a fault is determined according to whether noise exists in the transmitter, and a fault reason is determined according to the flicker condition of a digital circuit board indicating lamp 3D2; if the fault is not the digital circuit board fault, determining whether the fault is a device fault on the transmitter power panel; according to whether the acquisition attenuator FBJ port has a DC24V signal, determining whether the acquisition attenuator has a wiring fault; and correction is carried out according to the confirmed fault, and the state of the transmitter indicating lamp on the acquisition attenuator panel is confirmed again. According to the invention, multiple aspects of the transmitter of the ZPW-2000A track circuit system are subjected to troubleshooting, the fault reason can be quickly positioned, the fault processing time is shortened, and the situation that if the fault cannot be positioned in a short time, the fault delay is long, D-type accidents are caused, and normal running of a railway is directly influenced is avoided.

Description

Technical Field

[0001] The invention relates to the field of track circuit equipment fault positioning, and in particular to a ZPW-2000A track circuit system transmitter fault troubleshooting method. Background Art

[0002] ZPW-2000A track circuit is an essential basic equipment for my country's high-speed railway train operation control system. Its transmitter is used to generate high-precision and high-stability frequency-shift signals.

[0003] In recent years, with the increase in the service life of equipment, the system failure problems caused by the transmitter have increased year by year, and the causes of the failure are more complex and diverse, including but not limited to: low-frequency condition coding failure, power amplifier circuit detection failure, transmitter output short circuit, working indicator light reverse connection or open circuit, diode open circuit or reverse connection, rectifier bridge open circuit or reverse connection, optocoupler failure, etc. If the cause cannot be quickly determined, it may cause a Class D accident in serious cases, affecting the normal operation of the railway.

[0004] Although there are many classic cases of transmitter fault handling, there is no effective troubleshooting method to quickly locate the cause of the fault. When handling transmitter faults during construction and commissioning, the existing processing methods are single, time-consuming, and have many blind spots, which affects the normal opening progress of the station. For faults that occur after normal operation, it is even more necessary to locate the fault quickly. If the fault cannot be located in a short time, it will cause a long fault delay, resulting in a Class D accident, which directly affects the normal operation of the railway. Therefore, the present invention proposes a ZPW-2000A track circuit system transmitter fault troubleshooting method. Summary of the invention

[0005] In view of the above-mentioned shortcomings and deficiencies, the present invention provides a ZPW-2000A track circuit system transmitter fault troubleshooting method. According to the process steps of the method, on-site maintenance and debugging personnel can quickly locate the cause of the transmitter failure according to the method, shorten the fault handling time, and reduce the possibility of railway Class D accidents.

[0006] In order to achieve the above object, the present invention provides a ZPW-2000A track circuit system transmitter fault troubleshooting method, comprising the following steps: S1: Determine the status of the transmitter indicator light on the acquisition attenuator panel to determine whether the transmitter is faulty; S2: If it is confirmed to be a transmitter fault, determine whether it is a digital circuit board fault of the transmitter based on whether there is noise inside the transmitter. If it is a digital circuit board fault, determine the cause of the fault based on the flashing of the digital circuit board indicator light 3D2; if it is confirmed not to be a circuit board fault, further determine the fault based on the type of noise; S3: If it is confirmed that the fault is not caused by the digital circuit board and the transmitter output short circuit, first determine whether the fault is caused by a component on the transmitter power board based on whether there is a DC24V signal at the transmitter FBJ port; if it is confirmed that the fault is not caused by the transmitter power board, determine whether the fault is caused by the wiring of the acquisition attenuator based on whether there is a DC24V signal at the acquisition attenuator FBJ port; S4: Make corrections based on the confirmed fault and reconfirm the status of the transmitter indicator light on the acquisition attenuator panel.

[0007] The S1 is specifically: collecting the status of the transmitter indicator light on the attenuator panel to determine whether the transmitter is faulty. If the indicator light is green, it means that the transmitter is normal and has no faults. If the indicator light is off, it is determined that the transmitter is faulty.

[0008] The S2 is specifically: S201, if the indicator light in S1 is off, listen to see if there is a buzzing sound inside the transmitter; S2011. If there is a buzzing sound inside the transmitter, determine whether the buzzing sound is continuous or appears briefly and then disappears. If the buzzing sound appears briefly and then disappears, determine that the fault is a short circuit in the transmitter output; if the buzzing sound continues, determine whether the transmitter power board is faulty. S2012. If there is no humming sound inside the transmitter, it is determined that the transmitter digital circuit board is faulty.

[0009] In S2012, after determining that the transmitter digital circuit board is faulty, the flashing of the transmitter internal digital board fault indicator 3D2 is observed, which specifically includes the following situations: If the fault indicator light 3D2 flashes once, it is determined that the transmitter has a low-frequency conditional coding fault; If the fault indicator light 3D2 flashes twice, it is determined that the transmitter power amplifier circuit detection fault; If the fault indicator light 3D2 flashes 3, 4 or 5 times, it is determined that the crystal oscillator JT3 or JT4 of the transmitter is faulty; If the fault indicator light 3D2 flashes 6 times, it is determined that the transmitter model selection condition is faulty; If the fault indicator light 3D2 flashes 7 times, it is determined that the transmitter carrier frequency coding condition is faulty.

[0010] In S3, determining whether the fault is caused by a device on the transmitter power board according to whether there is a DC24V signal at the transmitter FBJ port specifically includes the following steps: S301, detecting whether there is a DC24V signal at the transmitter FBJ port, and if a signal is detected, determining that the wiring of the acquisition attenuator is faulty; S302: If there is no DC24V signal at the transmitter FBJ port, it is determined that there is a component failure on the transmitter power board or a power connection failure.

[0011] The S301 acquisition attenuator wiring failure includes the following situations: Detecting whether there is a DC24V signal at the acquisition attenuator FBJ port. If a signal is detected, it is determined that the wiring of the acquisition attenuator FBJ port is reversed and the transmitter indicator light on the acquisition attenuator cannot be driven; if no signal is detected, it is determined that there is a wiring break between the cabinet zero-layer terminal and the acquisition attenuator FBJ port or the transmitter FBJ port.

[0012] The S302 is specifically as follows: Detect whether there is a DC24V signal at the FBJ port of the transmitter power board. If a signal is detected, it is determined that the transmitter power connection is faulty, and observe whether the working indicator light of the power board is green. If the working indicator light of the power board is off, it can be determined that the working indicator light of the power board is reversely connected or broken; if the working indicator light of the power board is green, check whether the power connection is insulated; if no signal is detected, it is determined that the device on the power board is faulty, which specifically includes the following situations: S3021, detect whether the second terminal and the fourth terminal of the second rectifier bridge BR2 of the transmitter power board FBJ circuit have AC30V input, if there is no signal input, execute step S3022; if there is a signal input, detect whether the first terminal and the third terminal of the second rectifier bridge BR2 of the transmitter power board FBJ circuit have AC30V input, if there is a signal input, determine that the diode AV5 is open circuit or reverse connection, if there is no signal input, determine that the second rectifier bridge BR2 is open circuit or reverse connection; S3022, detect whether there is AC8V input at the second terminal and the fourth terminal of the first rectifier bridge BR1 of the transmitter power board FBJ circuit. If there is no signal input, determine whether the primary of the optocoupler AN2A is open circuit, the secondary is short circuit, or the diode AV1 is open circuit or reverse connection; if there is a signal input, execute step S3023; S3023, detect whether the first terminal and the third terminal of the first rectifier bridge BR1 of the transmitter power board FBJ circuit have AC8V output. If there is no signal output, determine whether the first rectifier bridge BR1 is open circuit or reverse connection. If there is a signal output, execute step S3024; S3024, using a multimeter to statically test whether the optocoupler AN2B has a primary short circuit, a secondary short circuit or a reverse connection of the optocoupler. If the test result shows a problem, it is determined that the optocoupler AN2B is faulty; if the test result shows no problem, executing step S3025; S3025. Use the multimeter's diode mode to statically test transistor AV2, with the red test lead pointing to B and the black test lead to C or E pole, to observe whether a voltage of 0.4~0.6V can be measured; if no voltage is detected, it is determined that transistor AV2 is faulty; if a voltage of 0.4~0.6V can be measured, transistor AV2 is not faulty, and diode AV6 is determined to have a reverse connection fault.

[0013] The present invention has the following beneficial effects and advantages: The present invention performs troubleshooting on various aspects of the ZPW-2000A track circuit system transmitter, and can quickly locate the causes of the transmitter's low-frequency condition coding fault, power amplifier circuit detection fault, transmitter output short circuit, power board working indicator light reverse connection or circuit break, diode circuit break or reverse connection, rectifier bridge circuit break or reverse connection, optocoupler fault and the like, shortening the fault handling time, and avoiding the long fault delay caused by the inability to locate the fault in a short time, resulting in a Class D accident, and directly affecting the normal operation of the railway. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The present invention is a flow chart of a ZPW-2000A track circuit system transmitter fault troubleshooting method. DETAILED DESCRIPTION

[0015] The present invention will be further described below in conjunction with the accompanying drawings. Figure 1 As shown, the present invention is a ZPW-2000A track circuit system transmitter fault troubleshooting method, comprising the following steps: S1: Determine the status of the transmitter indicator light on the acquisition attenuator panel to determine whether the transmitter is faulty; Specifically, the status of the transmitter indicator light on the attenuator panel is collected to determine whether the transmitter is faulty. If the indicator light is green, it means that the transmitter is normal and has no faults. If the indicator light is off, it is determined that the transmitter is faulty.

[0016] S2: If it is confirmed that the transmitter is faulty, determine whether it is a digital circuit board fault based on whether there is noise inside the transmitter. If it is a digital circuit board fault, determine the cause of the fault based on the flashing of the digital circuit board indicator 3D2. If it is confirmed that it is not a circuit board fault, further determine the fault based on the type of noise. Specifically, the steps include: S201, if the indicator light in S1 is off, listen to see if there is a buzzing sound inside the transmitter; S2011. If there is a buzzing sound inside the transmitter, determine whether the buzzing sound is continuous or appears briefly and then disappears. If the buzzing sound appears briefly and then disappears, determine that the fault is a short circuit in the transmitter output; if the buzzing sound continues, determine whether the transmitter power board is faulty. S2012. If there is no humming sound inside the transmitter, it is determined that the transmitter digital circuit board is faulty.

[0017] More specifically, in S2012, after determining that the transmitter digital circuit board is faulty, the flashing condition of the transmitter internal digital board fault indicator 3D2 is observed, which specifically includes the following conditions: If the fault indicator light 3D2 flashes once, it is determined that the transmitter low-frequency condition encoding fault; first check the external low-frequency condition wiring, and then check the optocoupler and diode in the low-frequency condition circuit of the digital board inside the transmitter.

[0018] If the fault indicator light 3D2 flashes twice, it is determined that the transmitter power amplifier circuit detection fault; this alarm usually occurs together with other faults, and is often caused by other faults. Solve other alarm problems first. If the indicator light still flashes twice, continue to search, including the following three other problems: Case 1: The second rectifier bridge BR2 and diode AV3 of the power board power amplifier detection circuit are faulty.

[0019] Case 2: After power-on, the transmitter works and stops instantly, and it is determined that the transmitter output is short-circuited.

[0020] Case 3: The four-terminal resistor CR4 of the transmitter digital circuit board op amp circuit is open or short-circuited, and the filter capacitor CC11 is short-circuited, which will cause the op amp circuit to have no output. Under normal conditions, there is a 1V frequency shift signal at both ends of the CC11 filter capacitor, which is the interface between the op amp output and the power amplifier circuit.

[0021] If the fault indicator light 3D2 flashes 3, 4 or 5 times, it is determined that the crystal oscillator JT3 or JT4 of the transmitter is faulty; directly check whether the JT3 and JT4 crystal oscillators correspond to the silk screen on the digital circuit board, and use an oscilloscope to test the crystal oscillator input power supply (DC3.3V) and crystal oscillator output signal (see the material crystal oscillator operating frequency). It may also be that the L3\L4 magnetic beads in the crystal oscillator power supply channel are broken, causing the crystal oscillator to not work and cause an alarm, but the crystal oscillator itself is not faulty.

[0022] If the fault indicator light 3D2 flashes 6 times, it is determined that the transmitter model selection condition is faulty; first check the external model selection condition wiring, and then check the model selection condition circuit optocoupler and diode of the transmitter's internal digital circuit board.

[0023] If the fault indicator light 3D2 flashes 7 times, it is determined that the transmitter carrier frequency coding condition is faulty; first check the external carrier frequency condition wiring, and then check the optocoupler and diode of the carrier frequency condition circuit of the transmitter's internal digital circuit board.

[0024] S3: If it is confirmed that the fault is not caused by the digital circuit board and the transmitter output short circuit, first determine whether the fault is caused by a component on the transmitter power board based on whether there is a DC24V signal at the transmitter FBJ port; if it is confirmed that the fault is not caused by the transmitter power board, determine whether the fault is caused by the wiring of the acquisition attenuator based on whether there is a DC24V signal at the acquisition attenuator FBJ port; S301, detect whether there is a DC24V signal at the transmitter FBJ port (FBJ-1(+) / FBJ-2(-)), if a signal is detected, it is determined that the wiring of the acquisition attenuator is faulty; Specifically, S301 includes the following situations: Detecting whether there is a DC24V signal at the FBJ port of the acquisition attenuator. If a signal is detected, it is determined that the wiring of the FBJ port of the acquisition attenuator is reversed and the transmitter indicator light on the acquisition attenuator cannot be driven; if no signal is detected, it is determined that there is a wiring break between the zero-layer terminal 2-3 or 2-4 of the cabinet and the FBJ port of the acquisition attenuator or the transmitter FBJ port.

[0025] S302. If there is no DC24V signal at the transmitter FBJ port, it is determined that there is a device failure or power connection failure on the transmitter power board. If there is a DC24V signal at the transmitter FBJ port, observe whether the power board working indicator light is green. If the power board working indicator light is off, it can be determined that the power board working indicator light is reversed or broken. If the power board working indicator light is green, then further check whether there is insulation damage at the power connection. You can turn off the power to disassemble it and check between the FBJ port of the transmitter base and the FBJ port shrapnel at the black socket group position of the cabinet. After correction, the transmitter indicator light on the acquisition attenuator panel is green; If the fault is caused by a component failure on the transmitter power board, it may include the following situations: S3021, detect whether the second terminal and the fourth terminal of the second rectifier bridge BR2 of the transmitter power board FBJ circuit have AC30V input, if there is no signal input, execute step S3022; if there is a signal input, detect whether the first terminal and the third terminal of the second rectifier bridge BR2 of the transmitter power board FBJ circuit have AC30V input, if there is a signal input, determine that the diode AV5 is open circuit or reverse connection, if there is no signal input, determine that the second rectifier bridge BR2 is open circuit or reverse connection; S3022, detect whether there is AC8V input at the second terminal and the fourth terminal of the first rectifier bridge BR1 of the transmitter power board FBJ circuit. If there is no signal input, determine whether the primary of the optocoupler AN2A is open circuit, the secondary is short circuit, or the diode AV1 is open circuit or reverse connection; if there is a signal input, execute step S3023; S3023, detect whether the first terminal and the third terminal of the first rectifier bridge BR1 of the transmitter power board FBJ circuit have AC8V output. If there is no signal output, determine whether the first rectifier bridge BR1 is open circuit or reverse connection. If there is a signal output, execute step S3024; S3024, using a multimeter to statically test whether the optocoupler AN2B has a primary short circuit, a secondary short circuit or a reverse connection of the optocoupler. If the test result shows a problem, it is determined that the optocoupler AN2B is faulty; if the test result shows no problem, executing step S3025; S3025. Use the multimeter's diode mode to statically test transistor AV2, with the red test lead pointing to B and the black test lead to C or E pole, to observe whether a voltage of 0.4~0.6V can be measured; if no voltage is detected, it is determined that transistor AV2 is faulty; if a voltage of 0.4~0.6V can be measured, transistor AV2 is not faulty, and diode AV6 is determined to have a reverse connection fault.

[0026] S4: Make corrections based on the confirmed fault and reconfirm the status of the transmitter indicator light on the acquisition attenuator panel.

[0027] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A ZPW-2000A track circuit system transmitter troubleshooting method, characterized in that: The following steps are involved: S1: Determine the status of the transmitter indicator light on the acquisition attenuator panel to determine whether the transmitter is faulty; S2: If it is confirmed that the transmitter is faulty, determine whether it is a digital circuit board fault based on whether there is noise inside the transmitter. If it is a digital circuit board fault, determine the cause of the fault based on the flashing of the digital circuit board indicator 3D2. If it is confirmed that it is not a circuit board fault, further determine the fault based on the type of noise. S3: If it is confirmed that the fault is not caused by the digital circuit board and the transmitter output short circuit, first determine whether the fault is caused by a component on the transmitter power board based on whether there is a DC24V signal at the transmitter FBJ port; if it is confirmed that the fault is not caused by the transmitter power board, determine whether the fault is caused by the wiring of the acquisition attenuator based on whether there is a DC24V signal at the acquisition attenuator FBJ port; S4: Make corrections based on the confirmed fault and reconfirm the status of the transmitter indicator light on the acquisition attenuator panel.

2. A ZPW-2000A track circuit system transmitter troubleshooting method according to claim 1, characterized in that: The S1 is specifically: collecting the status of the transmitter indicator light on the attenuator panel to determine whether the transmitter is faulty. If the indicator light is green, it means that the transmitter is normal and has no faults. If the indicator light is off, it is determined that the transmitter is faulty.

3. A ZPW-2000A track circuit system transmitter troubleshooting method according to claim 1, characterized in that: The S2 is specifically: S201, if the indicator light in S1 is off, listen to see if there is a buzzing sound inside the transmitter; S2011. If there is a buzzing sound inside the transmitter, determine whether the buzzing sound is continuous or appears briefly and then disappears. If the buzzing sound appears briefly and then disappears, determine that the fault is a short circuit in the transmitter output; if the buzzing sound continues, determine whether the transmitter power board is faulty. S2012. If there is no humming sound inside the transmitter, it is determined that the transmitter digital circuit board is faulty.

4. A ZPW-2000A track circuit system transmitter troubleshooting method according to claim 3, characterized in that: In S2012, after determining that the transmitter digital circuit board is faulty, the flashing of the transmitter internal digital board fault indicator 3D2 is observed, which specifically includes the following situations: If the fault indicator light 3D2 flashes once, it is determined that the transmitter has a low-frequency conditional coding fault; If the fault indicator light 3D2 flashes twice, it is determined that the transmitter power amplifier circuit detection fault; If the fault indicator light 3D2 flashes 3, 4 or 5 times, it is determined that the crystal oscillator JT3 or JT4 of the transmitter is faulty; If the fault indicator light 3D2 flashes 6 times, it is determined that the transmitter model selection condition is faulty; If the fault indicator light 3D2 flashes 7 times, it is determined that the transmitter carrier frequency coding condition is faulty.

5. A ZPW-2000A track circuit system transmitter troubleshooting method according to claim 1, characterized in that: In S3, determining whether the fault is caused by a device on the transmitter power board according to whether there is a DC24V signal at the transmitter FBJ port specifically includes the following steps: S301, detecting whether there is a DC24V signal at the transmitter FBJ port, and if a signal is detected, determining that the wiring of the acquisition attenuator is faulty; S302: If there is no DC24V signal at the transmitter FBJ port, it is determined that there is a component failure on the transmitter power board or a power connection failure.

6. A ZPW-2000A track circuit system transmitter troubleshooting method according to claim 5, characterized in that: The S301 acquisition attenuator wiring fault includes the following situations: Check whether there is a DC24V signal at the FBJ port of the acquisition attenuator. If a signal is detected, it is determined that the wiring of the FBJ port of the acquisition attenuator is reversed and the transmitter indicator light on the acquisition attenuator cannot be driven; if no signal is detected, it is determined that there is a wiring break between the zero-layer terminal of the cabinet and the FBJ port of the acquisition attenuator or the FBJ port of the transmitter.

7. A ZPW-2000A track circuit system transmitter troubleshooting method according to claim 5, characterized in that: The S302 is specifically as follows: Check whether there is a DC24V signal at the FBJ port of the transmitter power board. If a signal is detected, it is determined that the transmitter power connection is faulty. Observe whether the working indicator light of the power board is green. If the working indicator light of the power board is off, it can be determined that the working indicator light of the power board is reversed or broken. If the working indicator light of the power board is green, check whether the power connection is insulated. If no signal is detected, it is determined that the device on the power board is faulty, including the following situations: S3021, detect whether the second terminal and the fourth terminal of the second rectifier bridge BR2 of the transmitter power board FBJ circuit have AC30V input, if there is no signal input, execute step S3022; if there is a signal input, detect whether the first terminal and the third terminal of the second rectifier bridge BR2 of the transmitter power board FBJ circuit have AC30V input, if there is a signal input, determine that the diode AV5 is open circuit or reverse connection, if there is no signal input, determine that the second rectifier bridge BR2 is open circuit or reverse connection; S3022, detect whether there is AC8V input at the second terminal and the fourth terminal of the first rectifier bridge BR1 of the transmitter power board FBJ circuit. If there is no signal input, determine whether the primary of the optocoupler AN2A is open circuit, the secondary is short circuit, or the diode AV1 is open circuit or reverse connection; if there is a signal input, execute step S3023; S3023, detecting whether the first terminal and the third terminal of the first rectifier bridge BR1 of the transmitter power board FBJ circuit have AC8V output, if no signal is output, determining that the first rectifier bridge BR1 is open circuit or reversely connected; if there is a signal output, executing step S3024; S3024, using a multimeter to statically test whether the optocoupler AN2B has a primary short circuit, a secondary short circuit or a reverse connection of the optocoupler. If the test result shows a problem, it is determined that the optocoupler AN2B is faulty; if the test result shows no problem, executing step S3025; S3025. Use the multimeter's diode mode to statically test transistor AV2, with the red test lead pointing to B and the black test lead to C or E pole, to observe whether a voltage of 0.4~0.6V can be measured; if no voltage is detected, it is determined that transistor AV2 is faulty; if a voltage of 0.4~0.6V can be measured, transistor AV2 is not faulty, and diode AV6 is determined to have a reverse connection fault.

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