Track circuit comprehensive tester

Abstract

The utility model relates to a track circuit comprehensive tester, which comprises a shell, an analog signal processing circuit, a main control unit, a display unit, a power supply module, an input unit and a communication module are arranged in the shell, the analog signal processing circuit comprises a banana head jack and an instrument amplifier, the banana head jack is connected with a meter pen wire and a current clamp, and the banana head jack is connected with the current clamp. The main control unit is in communication connection with the display unit, the main control unit is electrically connected with the input unit, the main control unit is in communication connection with the communication module, and the power supply module is electrically connected with the main control unit, the display unit and the communication module; four circular through holes corresponding to the banana head jacks are formed close to the upper end of the side face of the shell, and a display unit and an input unit are embedded in the middle of the front face of the shell. The circuit is simple in structure, small in size, convenient to carry due to the arrangement of the shell, and convenient to operate due to the arrangement of the display unit and the input unit.

Description

Technical Field

[0001] The utility model relates to the technical field of railway signal detection, in particular to a track circuit comprehensive tester. Background Art

[0002] The ZPW-2000 series track circuit uses rails as conductors to automatically and continuously detect whether a line is occupied by a train. Furthermore, the track signal transmitted by the track circuit provides the train's onboard signaling equipment with a moving authorization (MA) through electromagnetic induction. During routine maintenance, technicians must perform tests on the rails using ZPW-2000 single-carrier automatic frequency selection signal measurement, ZPW-2000 multi-carrier frequency selection signal measurement, China frequency shift automatic frequency selection measurement, 25Hz / 50Hz phase-sensitive track circuit measurement, single-frequency AC signal measurement, DC voltage measurement, online capacitive reactance measurement, and online impedance measurement. This ensures the proper functioning of the ZPW-2000 series track circuit. Currently, most measurement equipment is box-type, making it difficult for technicians to carry the equipment as they test numerous rails.

[0003] Therefore, there is an urgent need for a track circuit comprehensive tester that is easy to carry and easy to operate for daily inspection and maintenance in electrical work areas. Summary of the Invention

[0004] In order to solve the problem that existing frequency shift parameter detection equipment is large and inconvenient to use, the utility model proposes a track circuit comprehensive tester adopting an embedded system structure, with a simple circuit structure and small size, a shell for easy carrying, and a display unit and an input unit for easy operation.

[0005] To achieve the above-mentioned purpose, the utility model provides a track circuit comprehensive tester, including a housing, in which an analog signal processing circuit, a main control unit, a display unit, a power module, an input unit, and a communication module are arranged. The analog signal processing circuit includes a banana plug jack and an instrument amplifier, the banana plug jack is connected to a test lead and a current clamp, the main control unit is communicatively connected to the display unit, the main control unit is electrically connected to the input unit, the main control unit is communicatively connected to the communication module, and the power module is electrically connected to the main control unit, the display unit, and the communication module;

[0006] Four circular through holes are provided on the upper side of the shell corresponding to the banana plug jacks, and a display unit and an input unit are embedded in the middle of the front of the shell.

[0007] Furthermore, the main control unit includes an MCU chip, an AD module is provided between the MCU chip and the output end of the instrumentation amplifier, and the MCU chip is communicatively connected to the AD module;

[0008] Connect the input of the instrumentation amplifier to the banana jack.

[0009] Set up the AD module to convert the analog signal into a digital signal for further processing by the MCU chip.

[0010] Furthermore, the display unit includes an LED display module;

[0011] The input unit includes a key module, and the key module includes a plurality of keys, and the keys are all connected to the IO pins of the MCU chip.

[0012] The button module is set to facilitate input of detection instructions, and the LED display module is set to facilitate observation of detection results.

[0013] Furthermore, the communication module includes one or more combinations of a WIFI module, a Bluetooth module, a Zigbee module and a LoRa module. The communication module is configured to complete wireless transmission of the detection data.

[0014] Furthermore, the power module includes a charging control circuit, a battery and a buck-boost circuit. The output end of the charging control circuit is connected to the battery, and the battery is connected to the charging control circuit.

[0015] It is equipped with a charging control circuit, a battery and a step-up / step-down circuit. It does not need to be connected to a power cord, is easy to carry, and the battery can be charged repeatedly.

[0016] Furthermore, a charging hole is provided on the side of the shell corresponding to the power module, and a clamping plate is provided on the back of the shell, and the clamping plate is fixed to the shell by bolts.

[0017] The splint is provided for easy carrying and fixing, and is convenient to use.

[0018] Furthermore, protrusions are equidistantly arranged on the side edges of the shell.

[0019] The side of the shell is provided with a protrusion for easy holding by technicians.

[0020] Through the above technical solution, the beneficial effects of the utility model are:

[0021] 1. The utility model has the advantages of small size, high precision and easy operation. The embedded system design is used to set up the analog signal processing circuit, main control unit, display unit, power module, input unit and communication module. The circuit structure is simple and the circuit volume is reduced. During operation, the technician sets the test lead or current clamp at the rail detection position, inputs the control instruction through the input unit, and the current signal is transmitted to the main control unit through the analog signal processing circuit. The main control unit outputs the detection result to the display unit, and the main control unit completes the upload of the detection data through the communication module. Simple operation. Provides the hardware foundation for completing ZPW-2000 single-carrier frequency automatic frequency selection signal measurement, ZPW-2000 multi-carrier frequency selection signal measurement, China frequency shift automatic frequency selection measurement, 25Hz / 50Hz phase-sensitive track circuit measurement, single-frequency AC signal measurement, DC voltage measurement, online capacitive reactance measurement, and online impedance measurement.

[0022] 2. The utility model is provided with a shell, which can be used to protect the hardware circuit, and the shell is provided for easy carrying and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 The utility model is an electrical schematic diagram of a track circuit comprehensive tester.

[0024] Figure 2 This is one of the structural diagrams of a track circuit comprehensive tester of the utility model;

[0025] Figure 3 This is the second structural diagram of a track circuit comprehensive tester of the utility model;

[0026] Reference numerals: 1 is a housing, 2 is an analog signal processing circuit, 3 is a main control unit, 4 is a display unit, 5 is a power module, 6 is an input unit, 7 is a communication module, 8 is a banana head jack, 9 is an AD module, and 10 is a splint. DETAILED DESCRIPTION

[0027] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0028] Example 1

[0029] like Figures 1-3As shown, a track circuit comprehensive tester includes a housing 1, wherein the housing 1 is provided with an analog signal processing circuit 2, a main control unit 3, a display unit 4, a power module 5, an input unit 6, and a communication module 7. The analog signal processing circuit 2 includes a banana plug jack 8 and an instrument amplifier, and the banana plug jack 8 is connected to a test lead and a current clamp. The main control unit 3 is communicatively connected to the display unit 4, the main control unit 3 is electrically connected to the input unit 6, and the main control unit 3 is communicatively connected to the communication module 7. The power module 5 is electrically connected to the main control unit 3, the display unit 4, and the communication module 7.

[0030] Four circular through holes are provided near the upper end of the side surface of the housing 1 corresponding to the banana plug jacks 8 , and a display unit 4 and an input unit 6 are embedded in the middle of the front surface of the housing 1 .

[0031] The main control unit 3 includes an MCU chip, and an AD module 9 is provided between the MCU chip and the output end of the instrumentation amplifier, and the MCU chip is in communication with the AD module 9;

[0032] The input end of the instrumentation amplifier is connected to the banana plug 8 .

[0033] In this embodiment, the MCU chip is specifically a GD32F450ZI chip, the AD module 9 uses an ADS1232 AD chip, the MCU chip and the AD module 9 communicate through an SPI serial port, and the instrument amplifier is an INA333 chip.

[0034] The display unit 4 includes an LED display module;

[0035] The input unit 6 includes a key module, which includes a plurality of keys, and each of the keys is connected to the IO pins of the MCU chip.

[0036] The LED display module communicates with the MCU chip through the UART serial port, and the buttons include K1~K10.

[0037] The communication module 7 includes one or more combinations of a WIFI module, a Bluetooth module, a Zigbee module and a LoRa module.

[0038] In this embodiment, the communication module 7 adopts a WIFI module, the WIFI module adopts an ESP8266 chip, and the ESP8266 chip communicates with the MCU chip through the SPI serial port.

[0039] The power module 5 includes a charging control circuit, a battery and a buck-boost circuit. The output end of the charging control circuit is connected to the battery, and the battery is connected to the charging control circuit.

[0040] A charging hole is provided on the side of the housing 1 corresponding to the power module 5 , and a clamping plate 10 is provided on the back of the housing 1 , which is fixed to the housing 1 by bolts.

[0041] The side edges of the housing 1 are provided with protrusions at equal intervals.

[0042] In the non-working state, the technician clamps the housing 1 on the work bag or work clothes through the clamping plate 10. The clamping plate 10 is made of metal and has a mirrored Z-shaped structure. The clamping plate 10 has toughness and is easy for the staff to carry.

[0043] During operation, connect the plug of the test lead or current clamp to the banana head jack 8, select the operation type through the input unit 6, apply the test lead or current clamp to the rail surface, and the current signal on the rail is collected by the instrument amplifier through the test lead or current clamp. Then the AD module 9 performs AD conversion on the collected signal, and the MCU chip receives the digital signal and displays the detection parameters through the LED display module. At the same time, the MCU chip uploads the detection parameters through the WIFI module.

[0044] The embodiments described above are only preferred embodiments of the present invention and do not limit the scope of implementation of the present invention. Therefore, any equivalent changes or modifications made based on the structure, features and principles described in the patent scope of the present invention should be included in the scope of the patent application of the present invention.

Claims

1. A track circuit comprehensive tester, characterized in that: The invention comprises a housing (1), wherein an analog signal processing circuit (2), a main control unit (3), a display unit (4), a power module (5), an input unit (6) and a communication module (7) are arranged in the housing (1), wherein the analog signal processing circuit (2) comprises a banana head jack (8) and an instrument amplifier, wherein the banana head jack (8) is connected to a test lead and a current clamp, wherein the main control unit (3) is communicatively connected to the display unit (4), the main control unit (3) is electrically connected to the input unit (6), the main control unit (3) is communicatively connected to the communication module (7), and the power module (5) is electrically connected to the main control unit (3), the display unit (4) and the communication module (7); Four circular through holes are provided on the upper side of the housing (1) corresponding to the banana plug jacks (8), and a display unit (4) and an input unit (6) are embedded in the middle of the front of the housing (1).

2. A track circuit comprehensive tester according to claim 1, characterized in that: The main control unit (3) includes an MCU chip, an AD module (9) is provided between the MCU chip and the output end of the instrument amplifier, and the MCU chip is communicatively connected to the AD module (9); The input of the instrumentation amplifier is connected to the banana jack (8).

3. A track circuit comprehensive tester according to claim 2, characterized in that: The display unit (4) includes an LED display module; The input unit (6) comprises a key module, the key module comprises a plurality of keys, and the keys are all connected to the IO pins of the MCU chip.

4. A track circuit comprehensive tester according to claim 1, characterized in that: The communication module (7) includes one or more combinations of a WIFI module, a Bluetooth module, a Zigbee module, and a LoRa module.

5. A track circuit comprehensive tester according to claim 1, characterized in that: The power supply module (5) comprises a charging control circuit, a battery and a step-up / step-down circuit, wherein the output end of the charging control circuit is connected to the battery, and the battery is connected to the charging control circuit.

6. A track circuit comprehensive tester according to claim 1, characterized in that: A charging hole is provided on the side of the shell (1) corresponding to the power module (5), and a clamping plate (10) is provided on the back of the shell (1). The clamping plate (10) and the shell (1) are fixed by bolts.

7. A track circuit comprehensive tester according to claim 1, characterized in that: The side edges of the housing (1) are provided with protrusions at equal intervals.

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