Fault diagnosis power supply for train

Abstract

The utility model discloses a fault diagnosis power supply for a train, which comprises a data acquisition circuit, an intelligent processing unit, a data storage unit and a communication unit, the input end of the data acquisition circuit is connected with a train power supply, and the output end of the data acquisition circuit is connected with the intelligent processing unit; the intelligent processing unit is further connected with a train control system through the communication unit. The data acquisition circuit is used for acquiring current information, voltage information and / or temperature information of a train power supply. According to the utility model, the power utilization safety of the train is ensured by monitoring the input and output of the power supply, processing data in time, judging the power supply condition and processing the abnormal condition; through storage of working data of the fault diagnosis power supply and communication with the train, accurate fault points can be provided for the train, and spare parts can be rapidly replaced.

Description

TECHNICAL FIELD

[0001] The utility model relates to train power supply technical field, especially train fault diagnosis power supply. BACKGROUND

[0002] There are multiple power conversion modules on the train, which convert the DC 110V power supply of the train into DC 48V, DC 24V or DV 5V to power different systems of the train. The power module on the train plays a key and core role in the train operation. During the installation, operation and maintenance of the train, a large number of power supply failures occur, and the root cause of the problem cannot be accurately determined on site. SUMMARY

[0003] The main purpose of the utility model is to provide a train fault diagnosis power supply, which can ensure the power safety of the train through monitoring the input and output of the power supply, timely processing data, judging the power supply condition and processing abnormal conditions. The train fault diagnosis power supply can store working data and communicate with the train to provide accurate fault points and quickly replace spare parts.

[0004] To achieve the above purpose, the utility model provides a train fault diagnosis power supply, which comprises a data acquisition circuit, an intelligent processing unit, a data storage unit and a communication unit. The input end of the data acquisition circuit is connected with the train power supply, and the output end is connected with the intelligent processing unit. The intelligent processing unit is further connected with the train control system through the communication unit.

[0005] The data acquisition circuit is used for acquiring current information, voltage information and / or temperature information of the train power supply.

[0006] The utility model further provides a technical scheme, wherein the data acquisition circuit comprises a current or voltage acquisition circuit, and the current or voltage acquisition circuit comprises a first signal amplification circuit, a signal isolation transmission circuit and a second signal amplification circuit connected in sequence.

[0007] The first signal amplification circuit comprises a resistor R1, a resistor R2, an amplifier U1 and a capacitor C1.

[0008] One end of the resistor R1 collects voltage or current signals, and the other end is connected with one end of the resistor R2, pin 2, pin 3 and pin 4 of the amplifier U1, one end of the capacitor C1 and the signal isolation transmission circuit. The other end of the resistor R2 is grounded, and pin 1 of the amplifier U1 is connected with one end of the capacitor C1 and the signal isolation transmission circuit.

[0009] The further technical scheme of the utility model discloses, signal isolation transmission circuit includes resistance R3, photoelectric coupler and capacitor C2, one end of resistance R3 is connected the pin 1 of amplifier U1, the other end is connected the pin 2 of photoelectric coupler, the pin 2 of amplifier U1 is connected the pin 4 of photoelectric coupler, the pin 6 of photoelectric coupler is connected one end of capacitor C2, the other end of capacitor C2 is grounded, and is connected second signal amplification circuit, the pin 5 of photoelectric coupler is connected second signal amplification circuit.

[0010] The further technical scheme of the utility model discloses, second signal amplification circuit includes capacitor C3, amplifier U2, resistance C4 and inductance L1, one end of capacitor C3 is grounded, and the other end is connected the pin 5 of amplifier U2, the pin 3 of amplifier U2 is connected one end of resistance R4 and the pin 5 of photoelectric coupler, the other end of resistance R4 is connected inductance L1, and the pin 2 of amplifier U2 is grounded.

[0011] The further technical scheme of the utility model discloses, communication unit includes communication chip and protection network circuit, one end of communication chip is connected intelligent processing unit, the other end of intelligent processing unit is connected protection network circuit, and protection network circuit connects train control system.

[0012] The further technical scheme of the utility model discloses, data acquisition circuit still includes overvoltage and undervoltage signal detection circuit.

[0013] The further technical scheme of the utility model discloses, still includes the data storage of intelligent processing unit connection.

[0014] The further technical scheme of the utility model discloses, still includes converter, and the amplifier EA of converter connection, and the amplifier EA is connected with intelligent processing unit.

[0015] The utility model discloses train fault diagnosis power supply's beneficial effect is:

[0016] The utility model discloses through above-mentioned technical scheme has realized to the real-time record and save of train power supply work data, is convenient for to the analysis maintenance of fault power supply, has realized the real-time control of multiple power supply input and output, and the power supply of train operation causes the fault, can make preliminary judgement and processing, prevents the expansion of fault, has realized with the communication of train, reports the fault, judges the trouble spot fast, thereby shortens the repair time. DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings described below only constitute some of the embodiments of the present application, and for those skilled in the art, other drawings can also be obtained according to the structures shown in the drawings without creative labor.

[0018] Figure 1 is the overall structure block diagram of the preferred embodiment of the train fault diagnosis power supply of the present application;

[0019] Figure 2 is the data acquisition principle diagram of the preferred embodiment of the train fault diagnosis power supply of the present application;

[0020] Figure 3 is the communication circuit diagram of the preferred embodiment of the train fault diagnosis power supply of the present application;

[0021] Figure 4 is the overvoltage signal detection circuit diagram of the preferred embodiment of the train fault diagnosis power supply of the present application;

[0022] Figure 5 is the fault diagnosis power supply control logic diagram of the preferred embodiment of the train fault diagnosis power supply of the present application.

[0023] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the accompanying drawings. Obviously, the described embodiments only constitute some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0025] The present application provides a train fault diagnosis power supply, which relates to the monitoring, protection and fault diagnosis power supply operation data recording of the train power supply to itself and the processing of data. The train fault diagnosis power supply of the present application has a self-diagnosis function, which records the working condition of itself in real time, monitors the operation data of itself, guarantees the safe operation of itself, and realizes the real-time monitoring of the train fault diagnosis power supply by the train through the 485 communication module.

[0026] Please refer to Figures 1 to 5The utility model discloses train fault diagnosis power supply better embodiment of preferred embodiment including data acquisition circuit, intelligent processing unit, data storage unit and communication unit, the input of data acquisition circuit is connected train power supply, and the output is connected intelligent processing unit, intelligent processing unit still passes through communication unit and train control system connection.

[0027] The data acquisition circuit is used for collecting current information, voltage information and / or temperature information of the train power supply.

[0028] The data acquisition circuit includes a current or voltage acquisition circuit, which includes a first signal amplification circuit, a signal isolation transmission circuit and a second signal amplification circuit connected in sequence.

[0029] The first signal amplification circuit includes a resistor R1, a resistor R2, an amplifier U1 and a capacitor C1.

[0030] One end of the resistor R1 collects voltage or current signals, and the other end is connected with one end of the resistor R2, pins 2, 3 and 4 of the amplifier U1, one end of the capacitor C1 and the signal isolation transmission circuit. The other end of the resistor R2 is grounded, and pin 1 of the amplifier U1 is connected with one end of the capacitor C1 and the signal isolation transmission circuit.

[0031] The signal isolation transmission circuit includes a resistor R3, an optical coupler and a capacitor C2. One end of the resistor R3 is connected with pin 1 of the amplifier U1, and the other end is connected with pin 2 of the optical coupler. Pin 2 of the amplifier U1 is connected with pin 4 of the optical coupler. Pin 6 of the optical coupler is connected with one end of the capacitor C2, and the other end of the capacitor C2 is grounded and connected with the second signal amplification circuit. Pin 5 of the optical coupler is connected with the second signal amplification circuit.

[0032] In this embodiment, the second signal amplification circuit includes a capacitor C3, an amplifier U2, a resistor R4 and an inductor L1. One end of the capacitor C3 is grounded, and the other end is connected with pin 5 of the amplifier U2. Pin 3 of the amplifier U2 is connected with one end of the resistor R4 and pin 5 of the optical coupler. The other end of the resistor R4 is connected with the inductor L1. Pin 2 of the amplifier U2 is grounded.

[0033] In this embodiment, the communication unit includes a communication chip and a protection network circuit. One end of the communication chip is connected with the intelligent processing unit, and the other end of the intelligent processing unit is connected with the protection network circuit. The protection network circuit is connected with the train control system.

[0034] In this embodiment, the data acquisition circuit further includes an overvoltage and undervoltage signal detection circuit.

[0035] The train fault diagnosis power supply in the embodiment further comprises a data storage connected with the intelligent processing unit.

[0036] The train fault diagnosis power supply in the embodiment further comprises a converter, an amplifier EA connected with the converter, and the amplifier EA is connected with the intelligent processing unit.

[0037] The working principle of the train fault diagnosis power supply is described in detail as follows.

[0038] Firstly, the train fault diagnosis power supply realizes data acquisition in the following manner.

[0039] 1) Voltage acquisition: the voltage signal of the fault diagnosis power supply is divided by a precise large resistance, and the voltage signal to be acquired is divided to about 0.1V (which changes with the voltage fluctuation), and the signal acquisition is completed by an acquisition chip, so as to realize the accurate acquisition of the measured voltage ±3‰.

[0040] 2) Current acquisition: the fault diagnosis power supply selects a low resistance alloy resistor with 1 milliohm to acquire the current signal, and the voltage drop signal on the resistor is acquired, so as to realize the acquisition of the current, and the acquisition coupling degree reaches ±3‰.

[0041] 3) Temperature acquisition: the fault diagnosis power supply adopts a single bus high-precision temperature sensor, and the sensor is arranged near the heat source, so as to ensure the accuracy of the acquired signal.

[0042] Secondly, the train fault diagnosis power supply processes the acquired data locally.

[0043] The voltage and current data acquired by the fault diagnosis power supply belong to different power supply systems, and the fault diagnosis power supply independently processes different acquired objects locally: the fault diagnosis power supply picks up the acquired voltage and current signals by using an analog-to-digital conversion chip, so as to ensure the accuracy and originality of the signals, the analog-to-digital conversion chip is common with the acquired power supply system, and the local processing of the signals is realized. The temperature acquisition selects a single bus high-precision temperature sensor, so as to reduce the possibility of signal interference.

[0044] The digital signal converted by the analog-to-digital conversion chip is transmitted to the power supply monitoring module of the fault diagnosis power supply through a digital isolator, and the power supply monitoring module stores all data locally.

[0045] Thirdly, the train fault diagnosis power supply processes the data.

[0046] 1) Processing of the acquired input data.

[0047] The fault diagnosis power supply can judge the input data, and when the input voltage and current exceed the rated value, the fault diagnosis power supply sends the overvoltage and overcurrent information to the train host through 485, and when the input voltage and current exceed the dangerous safety limit value, the fault diagnosis power supply turns off the subsequent output, and simultaneously sends the abnormal information to the train host.

[0048] 2. Processing of the collected output data:

[0049] When the collected output voltage and current exceed the rated value, the fault diagnosis power supply sends the abnormal information to the train host. When the output power supply has faults such as short circuit, under-voltage and overload, the fault diagnosis power supply turns off the corresponding output channel and sends the related information to the train host, so that the train can realize real-time control of the power supply.

[0050] The fault diagnosis power supply is provided with address coding, and when one of the power supplies has an abnormality, the address coding preset by the fault diagnosis power supply is sent together with the alarm signal.

[0051] The technical solutions of the train fault diagnosis power supply of the utility model are further explained and described in combination with specific embodiments.

[0052] Embodiment one, monitoring and processing of the fault diagnosis power supply on DC110V voltage

[0053] The power supply of the fault diagnosis power supply is provided by the DC110V power supply of the train, and when the DC110V power supply is connected, the fault diagnosis power supply independently supplies power to the power supply monitoring module, the power supply monitoring module collects the input and output voltages, stores the voltage data in the power supply monitoring module in real time, and transmits the voltage information to the train host through 485 communication. The lower limit voltage 77V and the upper limit voltage 137.5V (for other output voltages, the rated voltage value ±5% can be set) are set on the PTU interface of the fault diagnosis power supply, the input voltage is adjusted to be greater than 137.5V, and the fault diagnosis power supply sends an overvoltage alarm to the train host. Continue to adjust the input voltage to 160V, and the power supply turns off the subsequent output.

[0054] When the external load is too heavy, short-circuited or the output voltage is reduced due to other reasons, the power supply monitoring module turns off the corresponding output to protect the fault diagnosis power supply.

[0055] Embodiment two, monitoring and processing of the fault diagnosis power supply on 5V output power supply current

[0056] When the fault diagnosis power supply is working normally, it will record the current of each output in real time. The 5V output power supply can provide an external rated current of 10A. In the PTU interface of the fault diagnosis power supply, the upper limit of the current of the 5V power supply output is set to 10.5A. When the load current reaches 10.5A, the fault diagnosis power supply sends an overcurrent alarm to the train host. If the output current continues to increase to 11A, the fault diagnosis power supply will shut down the 5V power supply output.

[0057] Example Three, Monitoring and Processing of Temperature by Fault Diagnosis Power Supply

[0058] The fault diagnosis power supply is provided with two single bus high-precision temperature sensors. One is used to monitor the working temperature of the power supply monitoring module, and the other is arranged in the easy heating area of the fault diagnosis power supply. The single bus temperature sensor can ensure that the collected data is not affected by the line. The sensor converts the collected temperature data into digital signals in the chip, and then transmits them to the power supply monitoring module. The power supply monitoring module analyzes the temperature data. In the PTU interface of the fault diagnosis power supply, the upper limit of the temperature is set to 50℃ (this limit is only for testing, and the temperature during vehicle operation will be higher than 50℃). The power supply load is set to 200W. When the collected temperature exceeds 50℃, the fault diagnosis power supply sends an over-temperature alarm to the train host. If the temperature rises to 100℃, the fault diagnosis power supply will shut down the power supply output.

[0059] Example Four, Self-protection function of fault diagnosis power supply

[0060] The fault diagnosis power supply monitors its own power supply in real time. When the power supply is normal, the power supply output may have abnormal events such as overvoltage, overcurrent, overload, short circuit, etc. The power supply monitoring module in the fault diagnosis power supply continues to collect power supply data and communicates with the vehicle host. The power supply monitoring module in the fault diagnosis power supply can still operate normally when the input voltage is lower than the rated minimum voltage of the fault diagnosis power supply (20V DC 57V). When the input voltage drops, the power supply monitoring module saves the collected data and stops running to protect the data safety. The power supply monitoring module achieves self-protection from hardware to data through monitoring and limiting the input and output of the fault diagnosis power supply and protecting the data.

[0061] Example Five, High-precision data collection function of fault diagnosis power supply

[0062] The fault diagnosis power supply can collect input and output signals with high precision, with a collection accuracy of within ±3‰. When the power supply voltage of the fault diagnosis power supply is adjusted by 0.2V, the input voltage can be observed to be adjusted accordingly in the PTU interface of the fault diagnosis power supply. When the input voltage is adjusted greatly, the input channel voltage can be observed to change greatly. When the load current is increased by 10mA, the current of the corresponding channel can be observed to increase by 10mA in the PTU interface.

[0063] The train fault diagnosis power supply has the beneficial effects that:

[0064] The train fault diagnosis power supply has the beneficial effects that:

[0065] The above is only preferred embodiments of the present application, and does not limit the patent scope of the present application, and any equivalent structural transformation made by using the content of the present application specification and drawings, or direct / indirect application in other related technical fields is included in the patent protection scope of the present application.

Claims

1. A fault diagnosis power supply for trains, characterized in that, The application relates to a train power supply monitoring system, which comprises a data acquisition circuit, an intelligent processing unit, a data storage unit and a communication unit, wherein the input end of the data acquisition circuit is connected with a train power supply, the output end of the data acquisition circuit is connected with the intelligent processing unit, and the intelligent processing unit is connected with a train control system through the communication unit. The data acquisition circuit is used for collecting current information, voltage information and / or temperature information of the train power supply. The data acquisition circuit comprises a current or voltage acquisition circuit, which comprises a first signal amplification circuit, a signal isolation transmission circuit and a second signal amplification circuit connected in sequence.

2. The train fault diagnostic power supply according to claim 1, characterized by The first signal amplification circuit comprises a resistor R1, a resistor R2, an amplifier U1 and a capacitor C1. One end of the resistor R1 collects a voltage or current signal, the other end of the resistor R1 is connected with one end of the resistor R2, a pin 2, a pin 3 and a pin 4 of the amplifier U1, one end of the capacitor C1 and the signal isolation transmission circuit, the other end of the resistor R2 is grounded, and a pin 1 of the amplifier U1 is connected with one end of the capacitor C1 and the signal isolation transmission circuit. The signal isolation transmission circuit comprises a resistor R3, an optical coupler and a capacitor C2, one end of the resistor R3 is connected with a pin 1 of the amplifier U1, the other end of the resistor R3 is connected with a pin 2 of the optical coupler, a pin 2 of the amplifier U1 is connected with a pin 4 of the optical coupler, a pin 6 of the optical coupler is connected with one end of the capacitor C2, the other end of the capacitor C2 is grounded and connected with the second signal amplification circuit, and a pin 5 of the optical coupler is connected with the second signal amplification circuit.

3. The train fault diagnostic power supply according to claim 2, characterized by The second signal amplification circuit comprises a capacitor C3, an amplifier U2, a resistor R4 and an inductor L1, one end of the capacitor C3 is grounded, the other end of the capacitor C3 is connected with a pin 5 of the amplifier U2, a pin 3 of the amplifier U2 is connected with one end of the resistor R4 and a pin 5 of the optical coupler, the other end of the resistor R4 is connected with the inductor L1, and a pin 2 of the amplifier U2 is grounded.

4. The train fault diagnostic power supply according to claim 3, characterized by The communication unit comprises a communication chip and a protection network circuit, one end of the communication chip is connected with the intelligent processing unit, the other end of the intelligent processing unit is connected with the protection network circuit, and the protection network circuit is connected with the train control system.

5. The train fault diagnostic power supply according to claim 4, characterized by The data acquisition circuit further comprises an overvoltage and undervoltage signal detection circuit.

6. The train fault diagnostic power supply of claim 1, wherein The application further comprises a data storage unit connected with the intelligent processing unit.

7. The train fault diagnostic power supply of claim 1, wherein The application further comprises a transformer, an amplifier EA connected with the transformer, and the amplifier EA is connected with the intelligent processing unit.

8. The train fault diagnostic power supply of claim 1, wherein ​

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