CN110736569A - A test device and test method for axle temperature alarm - Google Patents

Abstract

The invention discloses a testing device and a testing method for axle temperature alarms, wherein the testing device comprises a single chip microcomputer and a main control unit, the single chip microcomputer is connected with the main control unit, the single chip microcomputer is also connected with an axle temperature alarm to be tested, the main control unit is used for sending an analog temperature detection signal to the single chip microcomputer, and the single chip microcomputer sends the analog temperature detection signal to the axle temperature alarm to be tested.

Description

A test device and test method for axle temperature alarm

technical field

Embodiments of the present invention relate to the technical field of testing, and in particular, to a testing device and a testing method for an axle temperature alarm.

Background technique

With the development of my country's railway construction, the number of locomotives used has increased sharply, and more and more attention has been paid to the safe operation of locomotives. The axle of the locomotive plays a vital role in the load-bearing and moving parts of the locomotive. During the operation of the locomotive, the axle needs to be detected in real time. The axle temperature alarm is the key equipment to reflect the running condition of the axle in real time. At present, the test device of the axle temperature alarm includes a bath temperature tank and an axle temperature sensor. The bath temperature tank is used to simulate the temperature environment, the temperature of the bath temperature tank is detected by the axle temperature sensor, and a temperature detection signal is sent to the axle temperature alarm. The device displays the current temperature according to the temperature detection signal. By comparing the temperature displayed by the axial temperature alarm with the temperature simulated by the bath temperature tank, the test of the axial temperature alarm is completed. The device is used to test the axial temperature alarm and work. It is difficult to meet the requirements of industrialization and automatic detection due to the large amount, long detection time and large detection error.

SUMMARY OF THE INVENTION

The invention provides a testing device and a testing method for an axle temperature alarm, so as to improve testing efficiency and testing accuracy.

In a first aspect, an embodiment of the present invention provides an axle temperature alarm test device, including:

Single chip microcomputer and main control unit;

The single-chip microcomputer is connected to the main control unit, and the single-chip microcomputer is also connected to the axle temperature alarm to be tested;

The main control unit is used for sending an analog temperature detection signal to the single-chip microcomputer;

The single-chip microcomputer sends the analog temperature detection signal to the to-be-tested axle temperature alarm.

Optionally, the single-chip microcomputer is used to send the number of each simulated temperature sensor to the axle temperature alarm to be tested when acquiring the query instruction sent by the axle temperature alarm to be tested, and to obtain the designation of the axle temperature alarm to be tested. The number of the simulated temperature sensor to be queried, obtain the simulated temperature detection signal sent by the main control unit according to the number of the simulated temperature sensor specified to be queried by the axle temperature alarm to be tested, and send the simulated temperature detection signal to the to-be-tested Axle temperature alarm.

Optionally, the single-chip microcomputer and the to-be-tested axle temperature alarm are electrically connected through a single bus.

Optionally, the single-chip microcomputer and the main control unit are electrically connected through a serial communication interface.

Optionally, the main control unit further includes a display touch screen;

The display touch screen is used to display the input interface of the analog temperature detection signal.

Optionally, the analog temperature detection signal includes:

At least one of the analog temperature sensor short circuit, the analog temperature sensor open circuit, the analog temperature sensor sensing temperature range, and the analog temperature sensor sensing temperature interval.

Optionally, the testing device for the axle temperature alarm provided by the embodiment of the present invention further includes a power supply module;

The power supply module is electrically connected to the single-chip microcomputer and the main control unit, respectively, and is used for supplying power to the single-chip microcomputer and the main control unit.

In a second aspect, an embodiment of the present invention also provides a method for testing an axle temperature alarm, including:

The main control unit sends an analog temperature detection signal to the microcontroller;

The single-chip microcomputer sends the analog temperature detection signal to the axle temperature alarm to be tested.

Optionally, before the main control unit sends the analog temperature detection signal to the microcontroller, the method further includes:

The single-chip microcomputer obtains the query instruction sent by the axle temperature alarm to be tested;

The single-chip microcomputer sends the number of each simulated temperature sensor to the to-be-tested axle temperature alarm;

The to-be-tested axle temperature alarm sends the designated query analog temperature sensor number to the single-chip microcomputer;

The single-chip microcomputer sends an analog temperature detection signal input instruction to the main control unit according to the designated query analog temperature sensor number.

Optionally, the analog temperature detection signal includes:

At least one of the analog temperature sensor short circuit, the analog temperature sensor open circuit, the analog temperature sensor sensing temperature range, and the analog temperature sensor sensing temperature interval.

According to the technical solution provided by the embodiment of the present invention, the output signal of the temperature sensor in the working state is simulated by the single chip microcomputer and the main control unit as the simulated temperature detection signal, and the simulated temperature detection signal is transmitted to the axle temperature alarm to be tested, so as to complete the detection of the axle temperature. The performance test of the alarm replaces the shaft temperature alarm detection device in the prior art that uses a bath temperature tank to simulate a temperature environment, and improves the test efficiency and detection accuracy of the shaft temperature alarm.

Description of drawings

1 is a schematic structural diagram of a testing device for an axle temperature alarm provided by an embodiment of the present invention;

2 is a schematic flowchart of a method for testing an axle temperature alarm provided by an embodiment of the present invention;

FIG. 3 is a schematic flowchart of another method for testing an axle temperature alarm according to an embodiment of the present invention.

Detailed ways

The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention. In addition, it should be noted that, for the convenience of description, the drawings only show some but not all structures related to the present invention.

FIG. 1 is a schematic structural diagram of an axle temperature alarm test device provided by an embodiment of the present invention. As shown in FIG. 1 , the axle temperature alarm test device provided by the embodiment of the present invention includes a microcontroller 11 and a main control unit 12 . The single chip 11 is connected with the main control unit 12 , and the single chip 11 is also connected with the axle temperature alarm 13 to be tested. The main control unit 12 is used for sending an analog temperature detection signal to the single chip 11 , and the single chip 11 sends the analog temperature detection signal to the axle temperature alarm 13 to be tested.

Specifically, the single-chip microcomputer 11 is connected to the main control unit 12, and can input test parameters of the simulated temperature detection signal to the main control unit 12. The main control unit 12 sends the simulated temperature detection signal to the single-chip microcomputer 11 according to the test parameters of the simulated temperature detection signal, and the single-chip microcomputer 11 Send the simulated temperature detection signal to the axle temperature alarm 13 to be tested, the axle temperature alarm 13 to be tested performs synchronous temperature display or alarm according to the simulated temperature detection signal, and displays the temperature of the axle temperature alarm 13 to be tested and the alarm and the input. The test commands are compared to complete the test of the axle temperature alarm 13 to be tested.

In the technical solution provided by the embodiment of the present invention, the output signal of the temperature sensor in the working state is simulated by the single chip 11 and the main control unit 12 as the simulated temperature detection signal, and the simulated temperature detection signal is transmitted to the axle temperature alarm 13 to be tested, and the completion of The performance test of the shaft temperature alarm replaces the shaft temperature alarm detection device in the prior art that uses a bath temperature tank to simulate a temperature environment, and improves the test efficiency and detection accuracy of the shaft temperature alarm.

Optionally, the single-chip microcomputer 11 is used to send the number of each simulated temperature sensor to the axle temperature alarm 13 to be tested when acquiring the query instruction sent by the axle temperature alarm 13 to be tested, and obtain the specified query from the axle temperature alarm 13 to be tested. For the simulated temperature sensor number, obtain the simulated temperature detection signal sent by the main control unit 12 according to the simulated temperature sensor number specified and queried by the axle temperature alarm 13 to be tested, and send the simulated temperature detection signal to the axle temperature alarm 13 to be tested.

Specifically, during the test, the axle temperature alarm 13 to be tested sends a query command to the single-chip microcomputer 11 , and the single-chip microcomputer 11 sends the query command to the main control unit 12 after receiving the query command. After the main control unit 12 receives the query command from the axle temperature alarm 13 to be tested, the number of analog temperature sensors and the corresponding numbers can be set by the main control unit 12, and the numbers of all the analog sensors are sent to the axle temperature alarm to be tested. 13, the axle temperature alarm 13 to be tested sends the number of the simulated temperature sensor specified to the single-chip microcomputer 11 according to the number of the simulated sensor. Through the analog temperature detection signal of the analog temperature sensor number preset by the main control unit 12, the output signal of the analog temperature sensor is simulated, and the analog temperature detection signal is sent to the axle temperature alarm 13 to be tested, and the axle temperature alarm 13 to be tested The temperature detection signal performs synchronous temperature display or alarm, compares the temperature display and alarm of the axle temperature alarm 13 to be tested with the analog temperature detection signal of the preset number of the simulated temperature sensor, and completes the test of the axle temperature alarm 13 to be tested . Exemplarily, the to-be-tested axle temperature alarm 13 sends an inquiry instruction to the single-chip microcomputer 11 , and the single-chip microcomputer 11 sends the inquiry instruction to the main control unit 12 after receiving the inquiry instruction. After the main control unit 12 receives the inquiry command from the axle temperature alarm 13 to be tested, the main control unit 12 sets the number of analog temperature sensors to 10, the corresponding numbers are 1-10, and the numbers 1-10 of all the analog sensors are set. 10 is sent to the axle temperature alarm 13 to be tested, and the axle temperature alarm 13 to be tested sends the specified query to the single-chip microcomputer 11 according to the number 1-10 of the simulated sensor. The number of the simulated temperature sensor is 1, and the single-chip microcomputer 11 receives the axle temperature alarm to be tested. After the analog temperature sensor number 1 of the designated query of the controller 13, according to the analog temperature detection signal of the analog temperature sensor number 1 preset by the main control unit 12, the output signal of the analog temperature sensor is simulated, and the analog temperature detection signal is sent to the test to be tested. Axle temperature alarm 13, the shaft temperature alarm 13 to be tested performs synchronous temperature display or alarm according to the analog temperature detection signal, and then, the shaft temperature alarm 13 to be tested sends a designated query to the single-chip microcomputer 11. The analog temperature sensor number is 2, and the single-chip microcomputer 11 According to the analog temperature detection signal with the analog temperature sensor number 2 preset by the main control unit 12, the output signal of the analog temperature sensor is simulated, and the analog temperature detection signal is sent to the axle temperature alarm 13 to be tested, and so on, to complete the simulated temperature The analog temperature of the sensor number 3-10 is inquired, and then, the axle temperature alarm 13 to be tested sends the designated query analog temperature sensor number 1 to the microcontroller 11, and the analog temperature of the analog sensor number 1-10 is cyclically inquired, Real-time temperature monitoring of multiple analog temperature sensors. Comparing the temperature display and alarm of the axle temperature alarm 13 to be tested with the preset analog temperature detection signal of the analog temperature sensor number, the test of the axle temperature alarm 13 to be tested is completed.

Continuing to refer to FIG. 1 , optionally, the single-chip microcomputer 11 is electrically connected to the axle temperature alarm 13 to be tested through a single bus 15 .

Specifically, as shown in FIG. 1 , the single bus 15 includes a single bus interface 151 , the single bus interface 151 is set on the single-chip microcomputer 11 , and the single bus interface 151 includes a power supply pin VCC, a data transmission pin RW and a first ground pin GND1 , the power supply pin VCC is used to supply power to the axle temperature alarm 13 to be tested, and the data transmission pin RW is used to transmit clock and data between the single chip 11 and the axle temperature alarm 13 to be tested. During the test, the single-chip microcomputer 11 simulates the working sequence of the single bus according to the simulated temperature detection signal, and completes the command and data exchange between the single-chip microcomputer 11 and the single-chip microcomputer of the axle temperature alarm 13 to be tested. The single bus 15 adopts a single signal line, which transmits both clock and data, and the data transmission is bidirectional. It has many advantages, such as saving I/O port lines, simple resource structure, low cost, and easy bus expansion and maintenance.

Continuing to refer to FIG. 1 , optionally, the single-chip microcomputer 11 and the main control unit 12 are electrically connected through a serial communication interface 16 .

Exemplarily, as shown in FIG. 1 , the single-chip microcomputer 11 includes a serial communication interface 16, wherein the serial communication interface 16 is an RS-232 standard interface, and the serial communication interface 16 includes a data receiving pin RXD and a data sending pin TXD. and the second ground pin GND2, the data receiving pin RXD is used to receive the analog temperature detection signal sent by the main control unit 12, and the data transmission pin TXD is used to send the query sent by the axle temperature alarm 13 to be tested to the main control unit 12 Command and analog temperature sensor number. A standard serial communication interface 16 is used for full-duplex communication between the single-chip microcomputer 11 and the main control unit 12, with few signal lines, flexible baud rate selection, long transmission distance, and high compatibility.

Continuing to refer to FIG. 1 , optionally, the main control unit 12 further includes a display touch screen 121 , and the display touch screen 121 is used to display an input interface of an analog temperature detection signal.

Specifically, the display touch screen 121 is used to display the input interface of the analog temperature detection signal, and the analog temperature detection signal is set through the display touch screen 121 to complete the human-computer interaction.

Optionally, the analog temperature detection signal includes at least one of: the analog temperature sensor is short-circuited, the analog temperature sensor is disconnected, the analog temperature sensor senses a temperature range, and the analog temperature sensor senses a temperature interval.

Specifically, when the analog temperature detection signal is set as the analog temperature sensor short-circuit signal, the single-chip microcomputer 11 simulates the output signal of the temperature sensor when the temperature sensor is short-circuited, and when the axle temperature alarm 13 to be tested detects the analog temperature sensor short-circuit signal, a short-circuit alarm is issued and a short circuit is displayed. Information, such as displaying the number of the analog temperature sensor that has a short circuit; when the analog temperature detection signal is set as the analog temperature sensor open circuit signal, the single chip 11 simulates the output signal of the temperature sensor when the circuit is open, and the axle temperature alarm 13 to be tested detects the analog temperature sensor. When there is an open circuit signal, an open circuit alarm will be issued and the open circuit information will be displayed, for example, the number of the analog temperature sensor that has been disconnected. The analog temperature sensor sensing temperature range and the analog temperature sensor sensing temperature interval confirm the current analog temperature, and use the analog temperature sensor output signal at the current temperature as the analog temperature detection signal, and send the analog temperature detection signal to the waiting The axle temperature alarm 13 is tested. After the axle temperature alarm 13 to be tested receives the analog temperature detection signal of the single-chip microcomputer 11, the temperature is displayed synchronously according to the analog temperature detection signal. The sensing temperature interval of the analog temperature sensor can be an increasing temperature value or a decreasing temperature value. For example, if the sensing temperature range of the analog temperature sensor is set to 0-100°C, and the sensing temperature interval of the analog temperature sensor is +5°C, the analog temperature Starting from 0°C and increasing at intervals of 5°C, the output signal of the single-chip microcomputer 11 simulates the temperature sensor at 0°C, 5°C, 10°C, etc. as the analog temperature detection signal, and sends the analog temperature detection signal to the axis to be tested. The temperature alarm 13, if the performance of the axle temperature alarm 13 to be tested is qualified, the axle temperature alarm 13 to be tested correspondingly displays temperature values such as 0°C, 5°C, and 10°C.

Continuing to refer to FIG. 1 , optionally, the apparatus for testing an axle temperature alarm provided by the embodiment of the present invention further includes a power supply module 14 , and the power supply module 14 is electrically connected to the single-chip microcomputer 11 and the main control unit 12 , respectively, and is used for connecting the single-chip microcomputer 11 and the main control unit to the single-chip microcomputer 11 and the main control unit 12 . Unit 12 is powered.

Exemplarily, as shown in FIG. 1 , the single-chip microcomputer 11 includes a first power supply interface 111 , the first power supply interface 111 includes a +12V power supply input pin and a third ground pin GND3 , and the power supply module 14 communicates with the single-chip microcomputer through the first power supply interface 111 . 11 provides a +12V power supply; the main control unit 12 includes a second power supply interface 122, the second power supply interface 122 includes a +24V power supply input pin and a fourth ground pin GND4, and the power supply module 14 passes through the second power supply interface 122 to the main control Unit 12 provides +24V power.

To sum up, the embodiment of the present invention provides an efficient and accurate axle temperature alarm test device, which is suitable for the maintenance and performance measurement of the axle temperature alarm of an electric locomotive. The testing device for the axle temperature alarm provided by the embodiment of the present invention is composed of a single-chip microcomputer 11 and a single bus drive to form an analog temperature sensor, receives the query instruction of the axle temperature alarm 13 to be tested, and sets the number and simulation of the analog temperature sensor through the main control unit 12. For the test parameters such as temperature range, analog temperature sensor sensing temperature range, and analog temperature sensor sensing temperature interval, the microcontroller 11 sends the numbers of all analog sensors to the axle temperature alarm 13 to be tested, and receives the designation of the axle temperature alarm 13 to be tested. The number of the queried analog temperature sensor, the output signal of the MCU 11 simulates the normal working digital temperature sensor to give the number and temperature signal of the analog temperature sensor, and transmits the analog temperature detection signal representing the number and temperature signal of the analog temperature sensor to the to-be-tested Axle temperature alarm 13, the to-be-tested shaft temperature alarm 13 displays the number and temperature of the analog temperature sensor according to the analog temperature detection signal, and issues a high temperature alarm of the temperature sensor when the analog temperature is higher than a preset threshold.

The single chip 11 can also simulate the output signal of the faulty digital temperature sensor, such as the output signal of the temperature sensor when an open-circuit fault occurs and the output signal of the temperature sensor when a short-circuit fault occurs. At this time, the axle temperature alarm 13 to be tested should correspond The temperature sensor open circuit alarm or the temperature sensor short circuit alarm is issued.

The main control unit 12 communicates with the microcontroller 11 through the RS232 interface, the main control unit 12 sends an analog temperature detection signal to the microcontroller 11 , and at the same time, the main control unit 12 receives and displays the device operating status and operating parameters uploaded by the microcontroller 11 . The main control unit 12 includes a display touch screen 121. After the main control unit 12 receives the query instruction sent by the axle temperature alarm 13 to be tested and the number of the simulated temperature sensor to be queried, it gives the simulated temperature representing the number and temperature of the simulated temperature sensor. The number and temperature or fault signal of the analog temperature sensor are displayed on the display touch screen 121 synchronously, and the corresponding number and temperature of the analog temperature sensor should also be displayed on the corresponding axle temperature alarm 13 to be tested.

The testing device for the axle temperature alarm provided by the embodiment of the present invention adopts the single chip 11 and the main control unit 12 to simulate the output signals of the normal temperature sensor and the fault temperature sensor as the simulated temperature detection signal, and transmits the simulated temperature detection signal to the axle temperature to be tested. The alarm 13 can complete the test of the temperature sensor temperature display, temperature sensor high temperature alarm, temperature sensor open circuit alarm, temperature sensor short circuit alarm and other functions of the locomotive axle temperature alarm in real time, quickly, in a wide range and comprehensively. According to the requirements of industrial production, the system is safe and reliable in operation, high in detection accuracy, simple in structure and easy to use, reducing manual participation in the testing process, high degree of automation, and minimizing the labor intensity of operators.

Based on the same inventive concept, an embodiment of the present invention also provides a method for testing an axle temperature alarm, and the explanations of structures and terms that are the same as or corresponding to the above-mentioned embodiments are not repeated here, and FIG. 2 is provided by an embodiment of the present invention. A schematic flowchart of a testing method for an axle temperature alarm, as shown in Figure 2, the method includes the following steps:

S110: The main control unit sends an analog temperature detection signal to the single-chip microcomputer.

S120: The single-chip microcomputer sends the analog temperature detection signal to the axle temperature alarm to be tested.

In the method for testing an axle temperature alarm provided by the embodiment of the present invention, the output signal of the temperature sensor in the working state is simulated by the single chip microcomputer and the main control unit as the simulated temperature detection signal, and the simulated temperature detection signal is transmitted to the axle temperature alarm to be tested, The performance test of the shaft temperature alarm is completed, which replaces the detection method of the shaft temperature alarm using a bath temperature tank to simulate the temperature environment in the prior art, and improves the test efficiency and detection accuracy of the shaft temperature alarm.

FIG. 3 is a schematic flowchart of another method for testing an axle temperature alarm provided by an embodiment of the present invention. As shown in FIG. 3 , optionally, before the main control unit sends an analog temperature detection signal to the single-chip microcomputer, the method further includes:

S210, the single chip obtains the query instruction sent by the axle temperature alarm to be tested.

S220: The single chip microcomputer sends the serial numbers of the simulated temperature sensors to the to-be-tested axle temperature alarm.

S230, the to-be-tested axle temperature alarm sends the designated query analog temperature sensor number to the single-chip microcomputer.

S240. The single-chip microcomputer sends an analog temperature detection signal input instruction to the main control unit according to the designated query analog temperature sensor number.

Specifically, during the test, the axle temperature alarm device to be tested sends a query command to the single-chip microcomputer, and after the single-chip microcomputer receives the query command, it sends the query command to the main control unit. After the main control unit receives the query command of the axle temperature alarm to be tested, the number of analog temperature sensors and corresponding numbers can be set through the main control unit, and the numbers of all analog sensors are sent to the axle temperature alarm to be tested. The test axle temperature alarm sends the designated query analog temperature sensor number to the single-chip microcomputer according to the number of the analog sensor. After the single-chip microcomputer receives the designated query simulation temperature sensor number of the axle temperature alarm to be tested, it will specify the query according to the simulation of the axle temperature alarm. The temperature sensor number sends an analog temperature detection signal input command to the main control unit, and the analog temperature detection signal of the analog temperature sensor number is input through the main control unit. It is sent to the axle temperature alarm to be tested, and the axle temperature alarm to be tested performs synchronous temperature display or alarm according to the simulated temperature detection signal, and displays the temperature of the axle temperature alarm to be tested and the simulated temperature of the simulated temperature sensor number entered in the alarm. The detection signals are compared to complete the test of the axle temperature alarm to be tested.

Optionally, the analog temperature detection signal includes at least one of: the analog temperature sensor is short-circuited, the analog temperature sensor is disconnected, the analog temperature sensor senses a temperature range, and the analog temperature sensor senses a temperature interval.

The embodiment of the present invention provides a scientific, reliable and efficient testing method for an axle temperature alarm, in which the output signals of the normal temperature sensor and the fault temperature sensor are simulated by the single chip microcomputer and the main control unit as the simulated temperature detection signal, and the simulated temperature detection signal is used as the simulated temperature detection signal. It is transmitted to the axle temperature alarm to be tested, and the test of the temperature sensor temperature display, temperature sensor high temperature alarm, temperature sensor open circuit alarm and temperature sensor short circuit alarm of the locomotive axle temperature alarm of the locomotive axle temperature alarm is completed quickly, widely and comprehensively in real time. The manual participation in the test process has a high degree of automation, which minimizes the labor intensity of the operators.

Note that the above are only preferred embodiments of the present invention and applied technical principles. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the protection scope of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and can also include more other equivalent embodiments without departing from the concept of the present invention. The scope is determined by the scope of the appended claims.

Claims (10)

1. an axle temperature alarm test device, is characterized in that, comprises: Single chip microcomputer and main control unit; The single-chip microcomputer is connected to the main control unit, and the single-chip microcomputer is also connected to the axle temperature alarm to be tested; The main control unit is used for sending an analog temperature detection signal to the single-chip microcomputer; The single-chip microcomputer sends the analog temperature detection signal to the to-be-tested axle temperature alarm. 2 . The testing device for an axle temperature alarm according to claim 1 , wherein the single chip microcomputer is used to send each simulated temperature sensor number to the Test the axle temperature alarm, obtain the simulated temperature sensor number specified by the axle temperature alarm to be tested, and obtain the simulated temperature detection sent by the main control unit according to the simulated temperature sensor number specified and queried by the axle temperature alarm to be tested. signal, and send the analog temperature detection signal to the to-be-tested axle temperature alarm. 3 . The axle temperature alarm testing device according to claim 1 , wherein the single-chip microcomputer and the axle temperature alarm to be tested are electrically connected through a single bus. 4 . 4 . The testing device for an axle temperature alarm according to claim 1 , wherein the single-chip microcomputer and the main control unit are electrically connected through a serial communication interface. 5 . 5. The axle temperature alarm test device according to claim 1, wherein the main control unit further comprises a display touch screen; The display touch screen is used to display the input interface of the analog temperature detection signal. 6. The axle temperature alarm test device according to claim 1, wherein the simulated temperature detection signal comprises: At least one of the analog temperature sensor short circuit, the analog temperature sensor open circuit, the analog temperature sensor sensing temperature range, and the analog temperature sensor sensing temperature interval. 7. The test device according to claim 1, further comprising a power module; The power supply module is electrically connected to the single-chip microcomputer and the main control unit, respectively, and is used for supplying power to the single-chip microcomputer and the main control unit. 8. A method for testing an axle temperature alarm, comprising: The main control unit sends an analog temperature detection signal to the microcontroller; The single-chip microcomputer sends the analog temperature detection signal to the axle temperature alarm to be tested. 9. The method according to claim 8, further comprising: The single-chip microcomputer obtains the query instruction sent by the axle temperature alarm to be tested; The single-chip microcomputer sends the number of each simulated temperature sensor to the to-be-tested axle temperature alarm; The to-be-tested axle temperature alarm sends the designated query analog temperature sensor number to the single-chip microcomputer; The single-chip microcomputer sends an analog temperature detection signal input instruction to the main control unit according to the designated query analog temperature sensor number. 10. The method according to claim 8, wherein the analog temperature detection signal comprises: At least one of the analog temperature sensor short circuit, the analog temperature sensor open circuit, the analog temperature sensor sensing temperature range, and the analog temperature sensor sensing temperature interval.

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