Motor train unit temperature sensor measuring device

Abstract

A motor train unit temperature sensor measuring device comprises a power supply, a starting switch, a one-input two-output wiring terminal, two LED digital display resistance meters and a temperature sensor adapter plug. The positive pole of the power supply is connected with the starting switch, and the starting switch is divided into two paths through the one-in and two-out wiring terminal to be respectively connected with the two LED digital display resistance meters; the negative electrode of the power supply is also divided into two paths through the one-in and two-out wiring terminal, and the two paths are respectively connected with the two LED digital display resistance meters; and the two LED digital display resistance meters are respectively connected with the temperature sensor adapter plug. The device can ensure that the electric appliance plug terminal of the temperature sensor is in good contact with the adaptive plug terminal of the temperature sensor, so that the probability of errors during measurement is reduced; and the resistance values of two channels of the temperature sensor can be measured simultaneously, so that the functions of reducing energy consumption and recycling are achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of rail vehicle circuit measurement, and can realize simultaneous measurement of different temperature channels of a bogie axle end temperature sensor, a traction motor temperature sensor and a gear box temperature sensor. Background Art

[0002] There are many bogie bearing temperature sensors in CRH380B(C) and CR400BF series EMUs. Taking CR400BF EMU as an example, each short-formation train is equipped with 64 bogie axle-end temperature sensors, 16 traction motor temperature sensors, and 32 gearbox temperature sensors. The temperature sensor is a PT100 resistance type. When a bogie temperature sensor fails or the bearing temperature rises, the train needs to be stored and a multimeter is used to measure the channel resistance of the corresponding temperature sensor one by one to confirm whether the sensor is faulty. Since the multimeter probe and the sensor plug terminal cannot be guaranteed to have complete good contact, errors are likely to occur when measuring resistance; at the same time, different temperature channels need to be measured and compared one by one, and the measurement efficiency is low. Therefore, a special temperature sensor resistance measurement device is made to improve the accuracy and efficiency of temperature sensor resistance measurement. Utility Model Content

[0003] The purpose of the utility model is to provide a temperature sensor measuring device suitable for use on EMUs, which can meet the requirements of simultaneous measurement of dual-channel resistance values ​​of bogie axle temperature sensors, simultaneous measurement of drive end / non-drive end temperature resistance values ​​of traction motor temperature sensors, and simultaneous measurement of large / small tooth temperature resistance values ​​of gearbox temperature sensors.

[0004] In order to achieve the above-mentioned purpose of the utility model, the utility model provides a temperature sensor measuring device for a train set, characterized in that it includes a power supply, a starting switch, a 1-input 2-output wiring terminal, two LED digital display resistance meters, and a temperature sensor adapter plug; the positive pole of the power supply is connected to the starting switch, and the starting switch branches out two paths through the 1-input 2-output wiring terminal and is respectively connected to the two LED digital display resistance meters; the negative pole of the power supply also branches out two paths through the 1-input 2-output wiring terminal and is respectively connected to the two LED digital display resistance meters; the two LED digital display resistance meters are respectively connected to the temperature sensor adapter plug.

[0005] Furthermore, it also includes a connection conversion head, one end of which is connected to the temperature sensor adapter plug, and the other end is connected to a temperature sensor electrical plug with a different plug structure to be converted.

[0006] Furthermore, the two LED digital display ohmmeters are LED digital display ohmmeter A and LED digital display ohmmeter B respectively, and the two test point wiring harnesses of the digital display ohmmeter A are connected to the 1st and 4th pins of the temperature sensor adapter plug; the two test point wiring harnesses of the LED digital display ohmmeter B output four wiring harnesses through two 1-input and 2-output terminal blocks to connect the 2nd and 5th pins and the 3rd and 8th pins of the temperature sensor adapter plug.

[0007] Furthermore, the power source is a rechargeable battery DC5V.

[0008] The advantages and progress of the utility model over the background technology are as follows:

[0009] When the existing CRH380B(C) and CR400BF series EMU bogie temperature sensor fails, it is necessary to compare and measure the temperature resistance of each channel to make a judgment, and perform a temperature rise test on the temperature sensor to observe the change of resistance of each channel. In the past, when testing the temperature sensor, it was necessary to use a multimeter's test lead and the plug terminal, which could not ensure complete good contact, and the efficiency of measuring resistance one by one was low. Therefore, a special EMU temperature sensor resistance measurement device was made, which has the following advantages:

[0010] 1. The EMU bogie temperature sensor measuring device is provided with a temperature sensor adapter plug that is compatible with the vehicle bogie temperature sensor electrical plug. The disassembled temperature sensor electrical plug is directly installed and connected to the temperature sensor adapter plug of the temperature sensor resistance measuring device to ensure that the temperature sensor electrical plug terminal is in good contact with the temperature sensor adapter plug terminal, thereby reducing the probability of error during measurement.

[0011] 2. The EMU temperature sensor resistance measurement device has two LED digital display resistance meters, which can ensure the simultaneous measurement of dual-channel resistance, including the shaft end temperature sensor A / B dual-channel resistance, the traction motor drive end / non-drive end temperature channel resistance, and the gearbox large / small gear bearing temperature, which improves the efficiency of measurement and comparison work.

[0012] 3. The resistance measurement device of the EMU temperature sensor adopts a rechargeable battery structure to achieve the functions of reducing energy consumption and recycling. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 Internal schematic diagram of the utility model;

[0014] Among them, 1. Rechargeable battery; 2. Start switch; 3. LED digital display resistance meter as A; 4. Temperature sensor adapter plug; 5. Connection conversion head; 6. LED digital display resistance meter B; 7. 1 input and 2 output terminal. DETAILED DESCRIPTION

[0015] In order to better understand the purpose, structure and function of the present invention, the temperature sensor measuring device of the present invention is described in detail below with reference to the accompanying drawings.

[0016] Reference Figure 1 The temperature sensor measuring device suitable for EMU includes a DC5V rechargeable battery 1, a start switch 2, an LED digital display resistance meter A3, a temperature sensor adapter plug HQ-012-F female core 4, a connection conversion head 5, an LED digital display resistance meter B6, and a 1-input 2-output terminal 7; the positive pole of the rechargeable battery 1 is connected to the start switch, and after the output from the start switch, the positive pole of the battery is divided into two power supplies for the LED digital display resistance meter A3 and the LED digital display resistance meter B6 respectively; the negative pole of the rechargeable battery 1 is connected to the 1-input 2-output terminal, and the negative pole is divided into two power supplies for the LED digital display resistance meter A3 and the LED digital display resistance meter B6 respectively; ensure that when the start switch is started, the rechargeable battery is connected in parallel with the two LED digital display resistance meters. The wiring of the two LED digital display resistance meters and the temperature sensor adapter plug 4 needs to be wired according to the terminal wiring pin positions of the EMU shaft end temperature sensor, the traction motor temperature sensor, and the gearbox large and small gear temperature sensor.

[0017] The electrical plug of the traction motor temperature sensor of CRH380B series, CRH380C and CR400BF EMUs has pins 1 / 2 and 3 / 4 on the drive end and pins 5 / 6 and 7 / 8 on the non-drive end; the corresponding temperature sensor plug model is HQ-012-M male core.

[0018] The electrical plug of the gearbox temperature sensor of CRH380B series, CRH380C and CR400BF EMU has pins 5 and 8 on the large gear wheel side and pins 1 and 4 on the small gear motor side; the corresponding temperature sensor plug model is HD-007-M male core.

[0019] Therefore, the two test point harnesses of the digital ohmmeter A3 are crimped to the terminals and connected to the 1st and 4th pins of the temperature sensor adapter plug 4; the two test point harnesses of the LED digital ohmmeter B6 are output through two 1-input and 2-output wiring terminals 7 to connect the 2nd and 5th pins and the 3rd and 8th pins of the temperature sensor adapter plug 4, so as to simultaneously measure the resistance values ​​of different channels of the shaft end temperature sensor, traction motor temperature sensor and gearbox temperature sensor.

[0020] The axle end temperature sensor of the bogie of CRH380B series, CRH380C and CR400BF EMUs is a dual-channel detection of A and B, and each channel is composed of at least two pin positions to form a PT100 resistance measurement circuit, wherein the A channel plug pin positions of the axle end temperature sensor of CRH380B series and CRH380C EMUs are 1 / 3 and 2 / 4 pins, and the B channel plug pin positions are 5 / 7 and 6 / 8 pins; the A channel electrical plug pin positions of the axle end temperature sensor of CR400BF EMUs are 1 and 4 pins, and the B channel electrical plug pin positions are 2 and 3 pins; at the same time, since the electrical plug model of the axle end temperature sensor of CRH380B series and CRH380C EMUs is HQ-012-M male core, and the electrical plug model of the axle end temperature sensor of CR400BF EMUs is HD-007-M male core, the connection conversion head 5 needs to be installed when measuring the temperature sensor of the corresponding vehicle model.

[0021] The connection conversion head 5 includes a temperature sensor adapter plug HQ-012-M male core, a wiring harness, and a temperature sensor adapter plug HD-007-F female core. One end of the wiring harness is connected to the temperature sensor adapter plug HQ-012-M male core by crimping the terminal CDSF1.5 male pin according to the adapter plug pin position number → the other end of the wiring harness is connected to the CR400BF temperature sensor adapter plug HD-007-F female core by crimping the terminal CDSF1.5 female pin according to the adapter plug pin position number.

[0022] Specific wiring assembly process:

[0023] 1. Positive pole of power supply: the positive pole of the rechargeable battery DC5V (constant voltage lithium battery) → connected in series to the contact of the start switch (boat switch KCD1) → the output end is connected to the 1-input 2-output terminal → the two positive poles are connected in parallel to the positive pole connection points of the two LED digital display resistance meters (YB5135R three-and-a-half-digit LED digital ohmmeter);

[0024] 2. Negative pole of power supply: negative pole of the rechargeable battery DC5V (constant voltage lithium battery) → connected to the 1-input 2-output terminal → the two separated negative pole connections are connected in parallel to the negative pole connection points of the two LED digital display resistance meters (YB5135R three-and-a-half-digit LED digital ohmmeter);

[0025] 3. The digital resistance meter A3 (YB5135R three-and-a-half-digit LED digital ohmmeter) is used as the A-way monitoring output. Two test harnesses → test harness crimping terminal CDSF1.5 female pin → connected to pins 1 and 4 of the temperature sensor adapter plug 4;

[0026] 4. Another LED digital resistance meter B6 (YB5135R three-and-a-half-digit LED digital ohmmeter) is used as the B-way monitoring output. Two test harnesses → Each harness is connected to a 1-input 2-output terminal (two in total) output of four harness crimping terminals CDSF1.5 female pins → One of the two terminals output through the terminal block is connected to the 2nd and 5th pins of the temperature sensor adapter plug 4; the other two terminals output through the terminal block are connected to the 3rd and 8th pins of the temperature sensor adapter plug 4;

[0027] 5. Since the adapter plug structures of the CRH380B (C) temperature sensor and the CR400BF shaft end temperature sensor are different, it is necessary to install and test the shaft end temperature sensor of the CR400BF EMU through the connection conversion head 5.

[0028] When measuring the resistance of the A / B channel of the bogie axle-end temperature sensor of CRH380B series and CRH380C EMUs, or the resistance of the drive / non-drive end channel of the traction motor temperature sensor of CRH380B series, CRH380C and CR400BF EMUs, the disassembled temperature sensor electrical plug can be inserted into the adapter plug of the temperature sensor measuring device. After turning on the start switch of the device, the resistance of the A / B channel of the bogie axle-end temperature sensor or the drive / non-drive end value of the traction motor temperature sensor is automatically generated through two LED digital display resistance meters (2KΩ range) according to the type of temperature sensor, which is used to compare the changes in the resistance of the temperature channel.

[0029] When measuring the A / B channel resistance of the shaft end temperature sensor of CR400BF EMU, or the temperature channel resistance of the large / small gear of the gearbox temperature sensor of CRH380B series, CRH380C and CR400BF EMU, install the connection conversion head on the temperature sensor adapter plug of the EMU temperature sensor measuring device, and then insert the disassembled temperature sensor electrical plug into the connection conversion head. After turning on the device start switch, the temperature channel resistance of the large / small gear of the gearbox temperature sensor is automatically generated by two LED digital display resistance meters (2KΩ range) according to the type of temperature sensor, which is used to compare the change of temperature channel resistance.

Claims

1. A temperature sensor measuring device for a train set, characterized in that: The device comprises a power supply (1), a start switch (2), two LED digital display resistance meters, a temperature sensor adapter plug (4), and a 1-input 2-output wiring terminal (7); the positive electrode of the power supply (1) is connected to the start switch (2), and the start switch (2) branches out two paths through the 1-input 2-output wiring terminal (7) and is respectively connected to the two LED digital display resistance meters; the negative electrode of the power supply (1) also branches out two paths through the 1-input 2-output wiring terminal (7) and is respectively connected to the two LED digital display resistance meters; and the two LED digital display resistance meters are respectively connected to the temperature sensor adapter plug (4).

2. The temperature sensor measuring device for a train set according to claim 1, characterized in that: It also comprises a connection conversion head (5), one end of which is connected to the temperature sensor adapter plug, and the other end of which is connected to a temperature sensor electrical appliance plug with a different plug structure to be converted.

3. The temperature sensor measuring device for a train set according to claim 1, characterized in that: The two LED digital display resistance meters are respectively an LED digital display resistance meter A (3) and an LED digital display resistance meter B (6); the two test point wire harnesses of the digital display resistance meter A (3) are connected to pins 1 and 4 of the temperature sensor adapter plug (4); the two test point wire harnesses of the LED digital display resistance meter B (6) are connected to pins 2 and 5 and pins 3 and 8 of the temperature sensor adapter plug (4) through two 1-input and 2-output wiring terminals (7).

Images