Railway vehicle Hall speed sensor testing device and system

Abstract

The embodiment of the invention provides a rail vehicle Hall speed sensor testing device and system.The testing device comprises a speed simulation device, a fixed shell of the speed simulation device comprises a main control circuit board, a first wireless communication module and a speed measurement gear module, and the first wireless communication module is in communication connection with an upper computer; the main control circuit board controls the speed measurement gear module to rotate at a preset rotating speed according to a test instruction of the upper computer, and sends a test speed signal to the upper computer through the first wireless communication module, so that the running speed of a vehicle is simulated, a corresponding test speed signal is generated, and an operator can conveniently obtain the test speed signal of the speed simulation device. The test accuracy is improved; and meanwhile, the automation and intelligence levels of the testing device are improved, and the complexity and error rate of manual operation are reduced.

Description

Technical Field

[0001] The present application relates to the technical field of rail vehicle testing, and in particular to a rail vehicle Hall velocity sensor testing device and system. Background Art

[0002] To ensure safe and accurate driving, each rail vehicle is equipped with four high-precision Hall speed sensors, which are responsible for real-time monitoring of the vehicle's running speed. When conducting a single vehicle brake test, in order to ensure the accuracy of the data and the smooth progress of the test, the staff must first manually disassemble the Hall sensor. Then, one person is responsible for operating the speed simulator and connecting it closely to the Hall speed sensor. When the speed simulator is started, the motor inside it drives the speed measuring gear to rotate rapidly. This rotation action allows the speed measuring gear to accurately cut the magnetic field of the Hall speed sensor test probe, thereby triggering the Hall speed sensor to generate speed pulse signals of different frequencies. These signals are quickly transmitted to the brake control unit along the carefully laid lines. The brake control unit accurately converts these pulse signals into speed data through advanced algorithms. In the existing debugging process, engineers establish a stable connection with the brake control unit through the dedicated debugging software of the brake control unit, and read the real-time speed information captured by the Hall speed sensor from it. If the software displays a speed value, it proves that the Hall speed sensor is working properly, thus providing a solid guarantee for the safe driving of rail vehicles.

[0003] The above test process is highly dependent on manual operation: High labor costs: The existing technical solutions require two operators to work together, which not only increases labor costs, but also limits production efficiency and scale. High operational complexity: Due to the cumbersome test steps, operators need to receive professional training, which increases the complexity of training and management. Risk of human error: Manual operation inevitably has errors, which may affect the accuracy of the test results. Lack of intuitive display: The speed simulator cannot directly display the speed value, making it impossible for the operator to grasp the test progress and results in real time. Lack of output value monitoring: Since the output value of the speed simulator cannot be monitored, the operator cannot accurately judge its working status, which affects the accuracy of the test. Summary of the invention

[0004] The embodiments of the present application provide a rail vehicle Hall velocity sensor testing device and system to solve the problem that the existing speed simulator cannot directly provide a velocity value and the testing progress of the testing system cannot be mastered.

[0005] In order to achieve the above objectives, this application provides the following technical solutions:

[0006] A rail vehicle Hall speed sensor test device includes a speed simulation device, which is used to connect with the probe of the Hall speed sensor, simulate the vehicle running speed and generate a corresponding test speed signal; the speed simulation device includes:

[0007] A fixed shell is provided with a main control circuit board, a first wireless communication module and a speed measuring gear module. The main control circuit board is connected to the first wireless communication module and the speed measuring gear module respectively, and the first wireless communication module is used to communicate with a host computer; the main control circuit board controls the rotation of the speed measuring gear module at a preset speed according to the test instruction of the host computer, and sends the test speed signal to the host computer via the first wireless communication module.

[0008] Optionally, the speed measuring gear module comprises:

[0009] A speed measuring gear, a servo drive module and a servo motor, wherein the servo drive module is respectively connected to the main control circuit board and the servo motor, and is used to drive the servo motor to drive the speed measuring gear to rotate at a preset speed.

[0010] Optionally, the speed simulation device further comprises:

[0011] The display module is located on the fixed housing and connected to the main control circuit board, and is used to display the actual speed value of the speed measuring gear module.

[0012] Optionally, the speed simulation device further comprises:

[0013] A support rod and a base, wherein the top of the support rod is provided with the fixed shell, and the bottom of the support rod is fixed to the base.

[0014] Optionally, the speed simulation device further comprises:

[0015] A position adjustment assembly, comprising a transverse sliding member and a slideway located on the back side of the fixed housing, the slideway extending in a horizontal direction, the transverse sliding member being located on the support rod and slidably connected to the slideway;

[0016] The transverse sliding member is sleeved on the support rod and can be vertically moved and fixed along the support rod.

[0017] Optionally, the speed simulation device further comprises:

[0018] The transverse sliding locking assembly is located on the transverse sliding member and is arranged perpendicular to the direction of the slideway. One end of the sliding locking assembly can abut against the slideway for locking.

[0019] Optionally, a vertical slideway is provided on the support rod;

[0020] The speed simulation device also includes a vertical sliding locking assembly, which is located on the back side of the lateral sliding member, including a vertical sliding member and a vertical locking member. The vertical sliding member is mounted on the vertical slide of the support rod. The vertical locking member is located on the vertical sliding member and can lock the vertical sliding member with the vertical slide.

[0021] Optionally, the speed simulation device further comprises:

[0022] A power supply, a power indicator light and a power switch are respectively located on the fixed housing, and the power indicator light and the power switch are located on the outer side of the fixed housing.

[0023] Optionally, the speed simulation device is in four groups, which are respectively arranged corresponding to the Hall speed sensors of the four axes of the rail vehicle.

[0024] The present application provides a rail vehicle Hall velocity sensor testing system, comprising:

[0025] The rail vehicle Hall velocity sensor testing device according to any one of the above embodiments;

[0026] A host computer is connected to a brake control unit of a rail vehicle and a speed simulation device of the Hall speed sensor test device of the rail vehicle respectively;

[0027] The host computer is used to send a test instruction to the speed simulation device of the rail vehicle Hall speed sensor test device, and receive a test speed signal from the speed simulation device, and make a judgment based on the test speed signal and the actual speed signal of the Hall speed sensor to obtain a test result.

[0028] Optionally, it also includes:

[0029] The monitoring platform is connected to the host computer and is used to display test data and save test results.

[0030] Compared with the prior art, the rail vehicle Hall velocity sensor testing device and system provided in the embodiments of the present application have the following technical effects:

[0031] The fixed shell of the speed simulation device includes a main control circuit board, a first wireless communication module and a speed measuring gear module. The first wireless communication module is connected to the host computer for communication. The main control circuit board controls the rotation of the speed measuring gear module at a preset speed according to the test instructions of the host computer, and sends the test speed signal to the host computer via the first wireless communication module, thereby simulating the vehicle running speed and generating a corresponding test speed signal, which is convenient for operators to obtain the test speed signal of the speed simulation device and improve the test accuracy; at the same time, the automation and intelligence level of the test device is improved, and the complexity and error rate of manual operation are reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0033] Figure 1 A schematic diagram of the main structure of a speed simulation device provided in an embodiment of the present application;

[0034] Figure 2 for Figure 1 A rear view structural diagram of ;

[0035] Figure 3 for Figure 1 A schematic diagram of the rear view structure in another direction;

[0036] Figure 4 for Figure 1 A schematic diagram of a top view structure;

[0037] Figure 5 A manual test flow chart of a Hall speed sensor provided in an embodiment of the present application;

[0038] Figure 6 An automatic test flow chart of a Hall speed sensor provided in an embodiment of the present application;

[0039] Figure 7 A control flow chart for the initialization of the Hall velocity sensor test for a rail vehicle provided in an embodiment of the present application;

[0040] Figure 8 A manual control flow chart of a Hall speed sensor for a rail vehicle provided in an embodiment of the present application;

[0041] Fig. 9 A flow chart of automatic control of a Hall speed sensor for a rail vehicle provided in an embodiment of the present application;

[0042] Fig.10 This is a simplified structural diagram of a rail vehicle Hall velocity sensor testing system provided in an embodiment of the present application.

[0043] The following are marked in the accompanying drawings:

[0044] Fixed shell 1, WIFI antenna 2, display module 3, support rod 4, base 5, power switch 6, lateral sliding member 7, slide 8, vertical slide 9, lateral sliding locking assembly 10, vertical sliding member 11, vertical locking member 12, Hall speed sensor installation hole 13, power indicator light 14, Hall speed sensor test hole 15. DETAILED DESCRIPTION

[0045] The embodiment of the invention discloses a rail vehicle Hall velocity sensor testing device and system, so as to solve the problem that the existing velocity simulator cannot directly provide velocity value and the testing progress of the testing system cannot be mastered.

[0046] In order to make the technical solutions and advantages in the embodiments of the present application more clearly understood, the exemplary embodiments of the present application are further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than an exhaustive list of all the embodiments. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0047] See also Figure 1-4 , Figure 1 A schematic diagram of the main structure of a speed simulation device provided in an embodiment of the present application; Figure 2 for Figure 1 A rear view structural diagram of ; Figure 3 for Figure 1 A schematic diagram of the rear view structure in another direction; Figure 4 for Figure 1 Schematic diagram of the top view structure.

[0048] In a specific embodiment, the rail vehicle Hall speed sensor testing device provided in the present application includes a speed simulation device, which is used to connect to the probe of the Hall speed sensor, simulate the vehicle running speed and generate a corresponding test speed signal, thereby sending it to the host computer, so that the operator can obtain the test speed signal of the speed simulation device in real time. The speed simulation devices are respectively installed at the positions of the corresponding axles of the train. The speed simulation devices are preferably set to 4, corresponding to the Hall speed sensors of the 4 axles of the rail vehicle respectively.

[0049] The speed simulation device includes: a fixed housing 1, which is provided with a power supply, a main control circuit board, a first wireless communication module, a speed measuring gear module, a display module 3, a support rod 4 and a base 5; the main control circuit board is connected to the display module 3, the first wireless communication module and the speed measuring gear module respectively, wherein the main control circuit board is specifically a CPU central control unit, which is responsible for receiving the preset speed sent by the host computer, and sending the operating status, test speed and power of the test device to the host computer through the first wireless communication module, so as to realize remote monitoring and control of the device. The first wireless communication module is used for communication connection with the host computer; the main control circuit board controls the rotation of the speed measuring gear module at a preset speed according to the test instruction of the host computer, and sends the test speed signal to the host computer through the first wireless communication module. The first wireless communication module is a WiFi module, which receives and sends signals through the WIFI antenna 2, establishes a network connection with the host computer, and after the connection is successful, receives the control signal sent by the host computer, and feeds back the operating status and actual speed of the device to the host computer. The main control circuit board is connected to the power supply, which is a DC lithium battery, to provide stable power for the test device. The fixed housing 1 is provided with an external power interface, which can power the device and charge the lithium battery at the same time to ensure long-term continuous operation. The display module 3 is composed of a display and a display circuit, which receives data information sent by the main control circuit board and displays the actual test speed and equipment operation status of the device on the display, providing intuitive information feedback for the operator.

[0050] In one embodiment, the fixed shell 1 is a split structure, including an upper cover and a lower cover, wherein the upper cover and the lower cover are respectively made of ABS plastic, and the interior is a cavity structure for mounting the circuit board of the Hall speed signal detection device. The four corners are designed with stainless steel anchor nuts for fixing the circuit board. In addition, the lower cover of the shell is also designed with a structure for connecting with the fixing device to ensure the stability of the entire device. Among them, the upper cover is also provided with a Hall speed sensor installation hole 13 and a Hall speed sensor test hole 15.

[0051] The lower cover is also made of ABS plastic and has a hollow structure inside. It is responsible for installing a power switch 6, an external power interface, a display and a WIFI antenna 2, providing an intuitive operating interface for operators.

[0052] At the same time, the power supply, the main control circuit board, the first wireless communication module, the speed measuring gear module and the display module 3 are respectively arranged on the fixed housing 1, and the fixed housing 1 is fixed on the base 5 through the support rod 4, thereby providing an installation position for the test device through the base 5. During installation, the speed simulation device can be quickly installed at the position of the corresponding axis of the rail vehicle, and the connection of the speed simulation device can be effectively prevented from falling off, ensuring the continuity and accuracy of the test; the support rod 4 and the base 5 can be set as a metal bracket, which is both strong and flexible, and can adapt to different test environments and conditions, providing important support and guarantee for the test tooling. The support rod 4 is cylindrical and has a disc base 5. It is used to fix the Hall speed signal detection device and allows the device to move up and down and left and right on the bracket, so that the operator can adjust the angle of the device to meet different test requirements.

[0053] In another embodiment, the speed measuring gear module includes a speed measuring gear, a servo drive module and a servo motor. The servo drive module is connected to the main control circuit board and the servo motor respectively, and is used to drive the servo motor to drive the speed measuring gear to rotate at a preset speed. The speed measuring gear is a magnetic gear, preferably with 90 teeth. Driven by the servo motor, the speed measuring gear rotates continuously. The magnetic field changes generated during the rotation process are detected by the Hall speed sensor, thereby sending a high-frequency pulse signal to provide a basis for speed signal detection; the servo drive module receives the speed control signal sent by the main control circuit board, drives the servo motor to rotate according to the signal, and sends the actual speed information of the servo motor to the main control circuit board to ensure the accuracy and stability of the device operation. As the actuator of the module, the servo motor converts the speed signal into an actual rotation action under the control of the servo drive module. The incremental encoder on its shaft end can detect the actual speed of the motor and send it to the servo drive module.

[0054] In an optional embodiment, the speed simulation device further includes a position adjustment component, a lateral sliding locking component 10 and a vertical sliding locking component; the position adjustment component includes a lateral sliding member 7 and a slideway 8 located on the back side of the fixed housing 1, the slideway 8 extends in the horizontal direction, and the lateral sliding member 7 and the slideway 8 can slide relative to each other; the lateral sliding member 7 is mounted on the support rod 4, and can be vertically moved and fixed along the support rod 4. The slideway 8 extends in the lateral direction of the fixed housing 1, that is, in the horizontal direction, and the slideway 8 is preferably protruding from the wall surface of the fixed housing 1. The lateral sliding member 7 has a sliding portion that cooperates with the slideway 8 to achieve relative sliding between the fixed housing 1 and the lateral sliding member 7; the sliding portion is a sliding groove; wherein, the slideway 8 is provided in two groups, and two groups of sliding grooves are provided accordingly to ensure stable transmission of lateral sliding.

[0055] The lateral sliding locking assembly 10 includes two threaded fasteners located below the lateral sliding member 7. One end of the threaded fastener passes through the sliding groove and can abut against the slideway 8. The threaded fastener is moved toward or away from the slideway 8 by screwing to achieve locking. The threaded fastener can be set as a nut, a bolt or other threaded structure, as long as the same technical effect can be achieved.

[0056] By providing the lateral sliding member 7 and the slideway 8, the lateral position of the fixed housing 1 can be finely adjusted, the test position can be adjusted conveniently, the operation can be simplified, the time for testing and installing the equipment can be saved, and the test efficiency can be improved.

[0057] In another embodiment, a vertical slide 9 is provided on the support rod 4, and the vertical slide 9 extends longitudinally along the support rod 4. The vertical sliding member 11 has a center hole and is mounted on the vertical slide 9. The vertical locking member 12 is located on the vertical sliding member 11 and is arranged opposite to the vertical slide 9 to lock the vertical locking member 12 and the vertical slide 9. The vertical locking member 12 is a bolt or other threaded fastener, which is fixed to the vertical sliding member 11 by threads, and is moved in a direction close to or away from the vertical slide 9 by screwing to achieve locking.

[0058] Specifically, the speed simulation device also includes a power supply, a power indicator light 14 and a power switch 6 respectively located on the fixed shell 1. The power indicator light 14 and the power switch 6 are located on the outer side of the fixed shell 1 to facilitate the detection personnel to operate and observe them.

[0059] Preferably, there are four groups of speed simulation devices, which are respectively arranged corresponding to the Hall speed sensors of the four axes of the rail vehicle.

[0060] like Figure 5-10 As shown, Figure 5 A manual test flow chart of a Hall speed sensor provided in an embodiment of the present application; Figure 6 An automatic test flow chart of a Hall speed sensor provided in an embodiment of the present application; Figure 7 A control flow chart for the initialization of the Hall velocity sensor test for a rail vehicle provided in an embodiment of the present application; Figure 8 A manual control flow chart of a Hall speed sensor for a rail vehicle provided in an embodiment of the present application; Fig. 9 A flow chart of automatic control of a Hall speed sensor for a rail vehicle provided in an embodiment of the present application; Fig.10 This is a simplified structural diagram of a rail vehicle Hall velocity sensor testing system provided in an embodiment of the present application.

[0061] In a specific implementation, the specific testing process of the testing device includes:

[0062] Embodiment 1

[0063] 1. Test Preparation

[0064] 1. Turn on the power of the host control unit and ensure that it starts and runs automatically.

[0065] 2. Select appropriate monitoring software, start the software, and enter its control and display interface.

[0066] 3. Use an RJ45 to M12 Ethernet cable to connect the host control unit to the brake control unit (BCU) of the test vehicle to establish stable network communication.

[0067] 2. Equipment Inspection and Installation

[0068] 1. Ensure that the speed simulation device is intact and clearly marked.

[0069] 2. Connect the power to each speed simulation device one by one and observe the status of its power-on and power indicator lights.

[0070] 3. The speed simulation device automatically connects to the wireless network (WIFI) and confirms the network connection status through its display.

[0071] Connect the speed simulation device firmly to the fixing device and install them on the corresponding axles of the train respectively, making sure that the Hall speed sensor is installed in place.

[0072] 3. Network connection configuration

[0073] 1. When the host computer control unit is started, use its built-in WIFI hotspot to establish a network connection with the speed simulation device of the corresponding axis.

[0074] 2. The network configuration has been completed at the initial stage of the design, and no reconfiguration is required in subsequent use, ensuring that the network automatically establishes a stable connection.

[0075] 4. Test Execution

[0076] 1. Insert the test probe of the train Hall speed sensor into the test hole of the speed simulation device of the corresponding axis to ensure that it is firmly installed.

[0077] 2. Select manual test mode on the monitoring software, enter the speed simulation device parameters of the corresponding axis, and click Start.

[0078] 3. After receiving the speed setting value and the start signal, the speed simulation device controls the servo motor to run at the set speed through the servo drive module, driving the speed measuring gear to rotate.

[0079] 4. The Hall speed sensor collects the rotation information of the speed measuring gear and sends a high-frequency pulse signal to the brake control unit (BCU).

[0080] 5. After receiving the signal, the BCU displays the actual speed data on the monitoring software interface of the host control unit.

[0081] 5. Test completion and data processing

[0082] 1. Click the stop button to stop the speed simulation device and complete the test.

[0083] The test data is saved to the corresponding database and the test results of the Hall speed sensor are output.

[0084] Repeat the above steps to complete the Hall speed sensor test of the remaining axes.

[0085] 6. Equipment Removal and Shutdown

[0086] 1. After the test, remove all connected devices.

[0087] 2. Turn off the host computer control unit and speed simulation device.

[0088] Through the above steps, the manual testing process of the Hall speed sensor of the rail vehicle is completed.

[0089] Embodiment 2

[0090] 1. Connection and Preparation

[0091] 1. According to the steps described in Example 1, ensure that the host control unit and the brake control unit (BCU) are connected via an RJ45 to M12 Ethernet cable.

[0092] 2. At the same time, ensure that the speed simulation device is correctly connected to the Hall speed sensor on the train and that all equipment is powered on and running.

[0093] 2. Start the automatic test mode

[0094] 1. Select "Auto Test Mode" on the monitoring software.

[0095] 2. Enter the parameters of the speed simulation device of the corresponding axis.

[0096] 3. Click the "Start" button, and the Hall speed signal detection device receives the speed setting value and start signal through the wireless network (WIFI).

[0097] 3. Performing automated testing

[0098] 1. After receiving the signal, the speed simulation device controls the servo drive module to output a signal corresponding to the speed.

[0099] 2. The servo motor runs at the set speed according to the received signal and drives the speed measuring gear to rotate.

[0100] 3. The Hall speed sensor collects the rotation information of the speed measuring gear and sends out a high-frequency pulse signal.

[0101] 4. After receiving the high-frequency pulse signal, the brake control unit (BCU) feeds back the actual speed data to the monitoring software interface of the host control unit.

[0102] 4. Automatic testing and result output

[0103] 1. In automatic mode, the host control unit will automatically test the Hall speed sensors of axes 1 to 4.

[0104] 2. After the test is completed, the host computer control unit will automatically output the test results of the Hall speed sensor of each axis.

[0105] 5. Equipment Dismantling and Shutdown

[0106] 1. After the Hall speed sensor test of all axes is completed, remove all connected devices according to the corresponding operation steps.

[0107] 2. Turn off the host computer control unit and speed simulation device.

[0108] Through the above steps, the automatic testing process of the Hall speed sensor of the rail vehicle is completed.

[0109] The above test device reduces labor production costs and improves production efficiency: Compared with traditional technical solutions, the use of rail vehicle Hall speed sensor test device and system only requires two operators to complete the operation within the same operating time. This not only reduces the demand for human resources, but also significantly improves production efficiency, thereby reducing labor production costs.

[0110] At the same time, a special test device is provided to simplify the test process: it can greatly reduce the workload of the test work. In the automatic test mode, the device can test the Hall speed sensors of 4 axes at one time, greatly improving the test efficiency.

[0111] It improves test accuracy and reduces human errors: Using this method to test the Hall speed sensor can completely eliminate the intervention of human judgment, and can introduce an automated data analysis system to analyze the test data in real time and generate a detailed test report. The system can automatically determine the sensor status, thereby greatly reducing human test errors.

[0112] The quantitative analysis method is used to comprehensively improve the test accuracy. Compared with the traditional qualitative analysis, a clear speed value change range or threshold is set as the judgment standard for whether the sensor is qualified or not. When the speed value changes beyond this range, the system automatically alarms and prompts the operator to recheck; quantitative analysis provides more precise and objective data, making the test results more accurate.

[0113] Improve the level of test automation and intelligence: Compared with the traditional manual testing method, this test method significantly improves the level of automation and intelligence of rail vehicle Hall velocity sensor testing. This not only reduces the complexity and error rate of manual operation, but also makes the test process more efficient and intelligent.

[0114] Based on the rail vehicle Hall speed sensor test device provided in the above embodiment, the present application also provides a rail vehicle Hall speed sensor test system, including:

[0115] A rail vehicle Hall velocity sensor testing device as described in any of the above embodiments;

[0116] The upper computer is respectively connected to a brake control unit of a rail vehicle and a speed simulation device of a Hall speed sensor test device of a rail vehicle;

[0117] The host computer is used to send test instructions to the speed simulation device of the rail vehicle Hall speed sensor test device, receive the test speed signal of the speed simulation device, and make judgments based on the test speed signal and the actual speed signal of the Hall speed sensor to obtain the test result.

[0118] At the same time, the above test system also includes a monitoring platform, which is connected to the host computer and is used to display test data and save test results.

[0119] Although the preferred embodiments of the present application have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present application.

[0120] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A rail vehicle Hall velocity sensor test device, characterized in that: It includes a speed simulation device, which is used to connect with the probe of the Hall speed sensor, simulate the vehicle running speed and generate a corresponding test speed signal; The speed simulation device comprises: A fixed shell is provided with a main control circuit board, a first wireless communication module and a speed measuring gear module. The main control circuit board is connected to the first wireless communication module and the speed measuring gear module respectively, and the first wireless communication module is used to communicate with a host computer; the main control circuit board controls the rotation of the speed measuring gear module at a preset speed according to the test instruction of the host computer, and sends the test speed signal to the host computer via the first wireless communication module.

2. The rail vehicle Hall velocity sensor testing device according to claim 1, characterized in that: The speed measuring gear module comprises: A speed measuring gear, a servo drive module and a servo motor, wherein the servo drive module is respectively connected to the main control circuit board and the servo motor, and is used to drive the servo motor to drive the speed measuring gear to rotate at a preset speed.

3. The rail vehicle Hall velocity sensor testing device according to claim 2, characterized in that: The speed simulation device also includes: The display module is located on the fixed housing and connected to the main control circuit board, and is used to display the actual rotation speed value of the speed measuring gear module.

4. The rail vehicle Hall velocity sensor testing device according to claim 1, characterized in that: The speed simulation device also includes: A support rod and a base, wherein the top of the support rod is provided with the fixed shell, and the bottom of the support rod is fixed to the base.

5. The rail vehicle Hall velocity sensor testing device according to claim 4, characterized in that: The speed simulation device also includes: A position adjustment assembly, comprising a transverse sliding member and a slideway located on the back side of the fixed housing, the slideway extending in a horizontal direction, the transverse sliding member being located on the support rod and slidably connected to the slideway; The transverse sliding member is sleeved on the support rod and can be vertically moved and fixed along the support rod.

6. The rail vehicle Hall velocity sensor testing device according to claim 5, characterized in that: The speed simulation device also includes: The transverse sliding locking assembly is located on the transverse sliding member and is arranged perpendicular to the direction of the slideway. One end of the sliding locking assembly can abut against the slideway for locking.

7. The rail vehicle Hall velocity sensor testing device according to claim 5, characterized in that: A vertical slideway is provided on the support rod; The speed simulation device also includes a vertical sliding locking assembly, which is located on the back side of the lateral sliding member, including a vertical sliding member and a vertical locking member. The vertical sliding member is mounted on the vertical slide of the support rod. The vertical locking member is located on the vertical sliding member and can lock the vertical sliding member with the vertical slide.

8. The rail vehicle Hall velocity sensor testing device according to claim 1, characterized in that: The speed simulation device also includes: A power supply, a power indicator light and a power switch are respectively located on the fixed housing, and the power indicator light and the power switch are located on the outer side of the fixed housing.

9. The rail vehicle Hall velocity sensor testing device according to claim 1, characterized in that: The speed simulation devices are 4 groups, which are respectively arranged corresponding to the Hall speed sensors of the four axes of the rail vehicle.

10. A rail vehicle Hall velocity sensor test system, characterized in that: include: A rail vehicle Hall velocity sensor testing device as described in any one of claims 1 to 9; A host computer is connected to a brake control unit of a rail vehicle and a speed simulation device of the Hall speed sensor test device of the rail vehicle respectively; The host computer is used to send a test instruction to the speed simulation device of the rail vehicle Hall speed sensor test device, and receive a test speed signal from the speed simulation device, and make a judgment based on the test speed signal and the actual speed signal of the Hall speed sensor to obtain a test result.

11. The rail vehicle Hall velocity sensor test system according to claim 10, characterized in that: Also includes: The monitoring platform is connected to the host computer and is used to display test data and save test results.

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