Intelligent detection system based on fault diagnosis of driver controller of subway train

Abstract

An intelligent detection system based on subway train driver controller fault diagnosis comprises a touch screen, a switching power supply, a patch cord, a voltage division circuit module, an AD conversion module, a direct current low resistance tester, an STC12 single-chip microcomputer core board, a shift register module and a printed circuit board. The touch screen and the patch cord are mounted on a panel of the control box; the voltage division circuit module, the AD conversion module, the STC12 single-chip microcomputer core board and the shift register module are all integrated on a printed circuit board. The printed circuit board and the switching power supply are arranged in the control box; the direct current low resistance tester is used as a peripheral device and can be directly connected with the single-chip microcomputer core board of the single-chip microcomputer STC12 through a special level translator. According to the utility model, the switching of driver controller detection programs is realized by operating the touch screen, so that the detection of different types of driver controllers is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of electric passenger car controller detection, in particular to an intelligent detection system based on subway train controller fault diagnosis. Background Art

[0002] The driver controller (abbreviation: controller) is a main component in the traction electric drive system of subway vehicles. The controller is a master electric appliance used to operate the train. By operating the controller, the traction, braking and running speed of the train can be controlled, so as to ensure the safe and reliable running of the train.

[0003] According to the maintenance characteristics and fault impacts of subway vehicle controllers, as a key component for driving safety, the correctness of its logic and the reliability of detection are extremely important.

[0004] At present, the existing test bench for subway controllers only has the functions of static level detection and contact resistance testing.

[0005] When the controller has climbing or skip-level faults, the detection results of the original test bench show normal, and the faults cannot be detected in time. Content of the Utility Model

[0006] In order to overcome the defects of the above existing technologies, the purpose of the utility model is to provide an intelligent detection system based on subway train controller fault diagnosis. The system has the functions of skip-level detection and alarm, dynamic display of contact status, and contact resistance detection. By operating the touch screen, the switching of the controller detection program can be realized, so as to realize the detection of different models of controllers.

[0007] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0008] The intelligent detection system based on subway train controller fault diagnosis includes a touch screen 1, a switching power supply 2, a patch cord 3, a voltage dividing circuit module 4, an AD conversion module 5, a DC low-resistance tester 6, an STC12 single-chip microcomputer core board 7, a shift register module 8, and a printed circuit board 9;

[0009] The touch screen 1 and the patch cord 3 are installed on the control box panel;

[0010] The voltage dividing circuit module 4, the AD conversion module 5, the STC12 single-chip microcomputer core board 7, and the shift register module 8 are all integrated on a printed circuit board 9;

[0011] The printed circuit board 9 and the switching power supply 2 are installed in the control box;

[0012] The DC low-resistance tester 6 is used as a peripheral device and can be directly connected to the STC12 single-chip microcomputer core board 7 through a special level converter.

[0013] The touch screen 1 is connected to the first serial port of the STC12 single-chip microcomputer core board 7, used to transmit signals to the STC12 single-chip microcomputer core board 7, and display the data processed by the STC12 single-chip microcomputer core board 7. The touch screen 1 used is a 10.1-inch IPS capacitive touch screen of Taojingchi.

[0014] The switching power supply 2 is connected between the power input port and the STC12 single-chip microcomputer core board 7, and supplies power to devices such as the touch screen 1 and the controller through the power interface of the STC12 single-chip microcomputer core board 7.

[0015] The switching power supply 2 used is a 60W switching power supply with dual-group outputs of D-30B 5V2.2A / 24V1A.

[0016] The adapter cable 3 has three groups of wires, corresponding to the controllers of corresponding models, and is connected between the controller and the experimental device connector, used to transmit corresponding action information to the STC12 single-chip microcomputer core board 7.

[0017] The voltage dividing circuit module 4 and the AD conversion module 5 exist in pairs. The output end of the voltage dividing circuit module 4 is connected to the input end of the AD conversion module 5. The input end of the voltage dividing circuit module 4 is connected to the analog interface of the controller, used to step down the analog voltage signal and transmit it to the AD conversion module 5 for analog-to-digital conversion. Finally, the AD conversion module 5 transmits the digital signal to the STC12 single-chip microcomputer core board 7.

[0018] The DC low-resistance tester 6 is used to detect the contact resistance of the controller, and then transmit the resistance information to the STC12 single-chip microcomputer core board 7 for processing.

[0019] The chip used in the STC12 single-chip microcomputer core board 7 is STC12C5A60S2. The STC12 single-chip microcomputer core board 7 serves as the main control circuit, used to receive the digital signals of the touch screen 1, the AD conversion module 5, the DC low-resistance tester 6, and the shift register module 8, and send the signals to the touch screen 1 for display.

[0020] The shift register module 8 is used to receive the switch quantity signals of the controller and convert them into digital quantity signals and send them to the STC12 single-chip microcomputer core board 7.

[0021] The beneficial effects of the present utility model:

[0022] The utility model can detect the state of the controller. Through the patch cord, the action information of the controller is collected and converted in real time by the AD conversion circuit and the shift register module. The converted data is sent to the STC12 single-chip microcomputer core board through the IO port and sent to the touch screen through serial port 1 for real-time display, so as to solve the problems of skip-level detection and dynamic display. In addition, the device also has an RS232 interface, through which a DC low-resistance tester can be connected to obtain the resistance value of the travel switch and display it on the touch screen to meet the maintenance requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic wireframe structure diagram of the utility model.

[0024] Figure 2 It is a schematic structure diagram of the utility model.

[0025] Figure 3 It is a schematic circuit diagram of the printed circuit board of the utility model.

[0026] Reference numerals:

[0027] 1. Touch screen; 2. Switching power supply; 3. Patch cord; 4. Voltage dividing circuit module; 5. AD conversion module; 6. DC low-resistance tester; 7. STC12 single-chip microcomputer core board; 8. Shift register module; 9. Printed circuit board. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] The following further describes the utility model in detail with reference to the drawings.

[0029] As Figure 1 , Figure 2 shown, the intelligent detection system based on the fault diagnosis of the subway train controller according to the embodiment of the utility model includes a touch screen 1, a switching power supply 2, a patch cord 3, a voltage dividing circuit module 4, an AD conversion module 5, a DC low-resistance tester 6, an STC12 single-chip microcomputer core board 7 and a shift register module 8;

[0030] The touch screen 1 and the patch cord 3 are installed on the control box panel. The switching power supply 2, the voltage dividing circuit module 4, the AD conversion module 5, the STC12 single-chip microcomputer core board 7 and the shift register module 8 are installed in the control box. The DC low-resistance tester 6 is set outside the device as an external device;

[0031] The controller is respectively connected to the voltage dividing circuit module 4 and the shift register module 8 through the patch cord 3. The voltage dividing circuit module 4 is connected to the AD conversion module 5. The STC12 single-chip microcomputer core board 7 is connected to the AD conversion module 5, the shift register module 8, the DC low-resistance tester 6 and the touch screen 1. The switching power supply 2 is connected to the touch screen 1 and the STC12 single-chip microcomputer core board 7.

[0032] Through the above solution of the present utility model, the touch screen 1 is connected to the first serial port of the STC12 single-chip microcomputer core board 7, used to transmit information to the STC12 single-chip microcomputer core board 7, and display the data processed by the STC12 single-chip microcomputer core board 7. The touch screen 1 used is a 10.1-inch IPS capacitive touch screen of Taojingchi.

[0033] Through the above solution of the present utility model, the switching power supply 2 is connected between the power input port and the STC12 single-chip microcomputer core board 7, and supplies power to devices such as the touch screen 1 and the controller through the power interface of the STC12 single-chip microcomputer core board 7. The switching power supply 2 used is a 60W switching power supply with dual-group outputs of D-30B 5V2.2A / 24V1A.

[0034] Through the above solution of the present utility model, the adapter cable 3 has three groups of separately installed wires, and corresponding wires can be selected according to different models of the controller and connected between the controller and this system. It is used to transmit corresponding action information to the STC12 single-chip microcomputer core board 7.

[0035] Through the above solution of the present utility model, the voltage dividing circuit module 4 and the AD conversion module 5 exist in pairs. The output end of the voltage dividing circuit module 4 is connected to the input end of the AD conversion module 5, and the input end of the voltage dividing circuit module 4 is connected to the analog interface of the controller. It is used to step down the analog voltage signal and transmit it to the AD conversion module 5 for analog-to-digital conversion, and finally the AD conversion module 5 transmits the digital signal to the STC12 single-chip microcomputer core board 7.

[0036] Through the above solution of the present utility model, the DC low-resistance tester 6 is used to detect the contact resistance of the controller, and then transmit the resistance information to the STC12 single-chip microcomputer core board 7 for processing.

[0037] Through the above solution of the present utility model, the chip used for the STC12 single-chip microcomputer core board 7 is STC12C5A60S2. The STC12 single-chip microcomputer core board 7 serves as the main control circuit, used to receive signals from the touch screen 1, the AD conversion module 5, the DC low-resistance tester 6, and the shift register module 8, and then display on the touch screen 1.

[0038] Through the above solution of the present utility model, the shift register module 8 is used to receive the digital signal of the controller's switch quantity signal and convert it into a digital signal and send it to the STC12 single-chip microcomputer core board 7.

[0039] In specific applications, the controller operates to turn on or off the travel switch, and the resistance value of the potentiometer changes accordingly. The voltage division circuit module 4 and the shift register module 8 receive the changing signals from the controller through the patch cord 3, and convert these signals into digital signals that can be processed by the STC12 single-chip microcomputer core board 7. The STC12 single-chip microcomputer core board 7 then transmits and displays these digital signals on the touch screen.

[0040] The DC low-resistance tester 6 manually sends the measured resistance value to the STC12 single-chip microcomputer core board 7 through the serial port, and the STC12 single-chip microcomputer core board 7 then sends it to the touch screen 1 for display. The shift register module 8 is a cascaded circuit of 74hc165.

[0041] As Figure 3 shown, the printed circuit board 9 of the present utility model includes the core circuit of the STC12 single-chip microcomputer core board 7, the AD conversion module 5, the voltage division circuit module 4, the clock circuit, the cascaded circuit of 74HC165, the reset circuit, the pull-up resistor circuit, the switching power supply 2, the touch screen interface circuit, the serial port 2 interface circuit, the controller input terminal, the AD2 input circuit, and the standard voltage input circuit; the controller input terminal is connected to the cascaded circuit of 74HC165 and the voltage division circuit module 4 for transmitting the signals of the controller to the cascaded circuit of 74HC165 and the voltage division circuit module 4.

[0042] The cascaded circuit of 74HC165 is connected to the core circuit of the STC12 single-chip microcomputer core board 7 for transmitting signals to the single-chip microcomputer core for processing. The AD conversion module 5 is connected to the voltage division circuit module 4 and the core circuit of the STC12 single-chip microcomputer core board 7 for transmitting the signals processed by the voltage division circuit to the single-chip microcomputer core. The core circuit of the STC12 single-chip microcomputer core board 7 is connected to the clock circuit, the reset circuit, the power supply circuit, and the pull-up resistor to ensure the normal operation of the STC12 single-chip microcomputer core board 7. The standard voltage input circuit is connected to the AD conversion module 5 for providing a standard voltage signal to the AD conversion module 5. The serial port 2 interface circuit is connected to the core circuit of the STC12 single-chip microcomputer core board 7 for transmitting resistance signals to the STC12 single-chip microcomputer core board 7. The touch screen interface is connected to the core of the STC12 single-chip microcomputer core board 7 for transmitting signals between the STC12 single-chip microcomputer core board 7 and the touch screen 1.

[0043] The present utility model not only has the function of contact resistance testing, but also adds the dynamic detection function of contacts and levels. The detection method of the present utility model is more in line with the principle of the controller controlling the train. When the controller has a climbing or step-jumping fault, the present utility model can quickly feedback the type of the current fault to the detector in the form of a dialog box and jump to the contact display interface, facilitating the detector to quickly locate the fault point.

[0044] Working principle of the utility model:

[0045] The utility model adopts an STC12C5A69S2 single-chip microcomputer as the main control chip. The controller transmits the action information to the AD conversion module 5 and the shift register module 8 through a patch cord. The AD conversion module 5 and the 74HC165 cascade circuit convert the input analog and switch signals into digital signals that are easy to process by the single-chip microcomputer. The STC12 single-chip microcomputer core board 7 processes the input data, and the processed data is sent to the touch screen 1 in the form of TTL level through the touch screen interface for real-time display. When it is necessary to measure the contact resistance of the controller, the utility model is connected to the RS232 interface of the DC low-resistance tester through the serial port 2. The DC low-resistance tester obtains the resistance values of the travel switches one by one through manual operation and sends them to the STC12 single-chip microcomputer core board 7 through the RS232 interface. The STC12 single-chip microcomputer core board 7 then sends them to the touch screen 1 through the touch screen interface for display and recording.

Claims

1. An intelligent detection system based on fault diagnosis of subway train controllers, characterized in that: It comprises a touch screen (1), a switching power supply (2), a transfer line (3), a voltage divider circuit module (4), an AD conversion module (5), a DC low resistance tester (6), an STC12 single-chip microcomputer core board (7), a shift register module (8), and a printed circuit board (9); The touch screen (1) and the adapter cable (3) are installed on the control box panel; The voltage divider circuit module (4), the AD conversion module (5), the STC12 single-chip microcomputer core board (7) and the shift register module (8) are all integrated on a printed circuit board (9); The printed circuit board (9) and the switching power supply (2) are installed in a control box; The DC low resistance tester (6) is directly connected to the single-chip STC12 single-chip core board (7) as a peripheral device through a dedicated level converter.

2. The intelligent detection system based on subway train controller fault diagnosis according to claim 1 is characterized in that: The touch screen (1) is connected to the first serial port of the STC12 single-chip microcomputer core board (7) and is used to transmit signals to the STC12 single-chip microcomputer core board (7) and display data processed by the STC12 single-chip microcomputer core board (7). The touch screen (1) adopts a 10.1-inch IPS capacitive touch screen of Taojingchi.

3. The intelligent detection system based on subway train controller fault diagnosis according to claim 1 is characterized in that: The switch power supply (2) is connected between the power input port and the STC12 single-chip microcomputer core board (7), and supplies power to the touch screen (1) and the controller through the power interface of the STC12 single-chip microcomputer core board (7).

4. The intelligent detection system based on subway train controller fault diagnosis according to claim 1 is characterized in that: The switching power supply (2) adopts a D-30B 5V2.2A / 24V1A dual-output 60W switching power supply.

5. The intelligent detection system based on subway train controller fault diagnosis according to claim 1 is characterized in that: The adapter cable (3) has three groups of wires corresponding to corresponding models of controllers, connected between the controllers and the connectors of the experimental device, and used to transmit corresponding action information to the STC12 single-chip microcomputer core board (7).

6. The intelligent detection system based on subway train controller fault diagnosis according to claim 1 is characterized in that: The voltage divider circuit module (4) and the AD conversion module (5) exist in pairs, the output end of the voltage divider circuit module (4) is connected to the input end of the AD conversion module (5), and the input end of the voltage divider circuit module (4) is connected to the analog interface of the controller, so as to reduce the voltage of the analog voltage signal and transmit it to the AD conversion module (5) for analog-to-digital conversion, and finally the AD conversion module (5) transmits the digital signal to the STC12 single-chip microcomputer core board (7).

7. The intelligent detection system based on subway train controller fault diagnosis according to claim 1 is characterized in that: The DC low resistance tester (6) is used to detect the contact resistance of the controller, and then transmit the resistance information to the STC12 single chip microcomputer core board (7) for processing.

8. The intelligent detection system based on subway train controller fault diagnosis according to claim 1 is characterized in that: The chip used in the STC12 single-chip microcomputer core board (7) is STC12C5A60S2. The STC12 single-chip microcomputer core board (7) serves as a main control circuit, and is used to receive digital signals from the touch screen (1), the AD conversion module (5), the DC low resistance tester (6) and the shift register module (8), and send the signals to the touch screen (1) for display.

9. The intelligent detection system based on subway train controller fault diagnosis according to claim 1 is characterized in that: The shift register module (8) is used to receive the switch quantity signal of the controller and convert it into a digital quantity signal and send it to the STC12 single-chip microcomputer core board (7).

Images