A test assembly and test system

Abstract

The embodiment of the application provides a test assembly and a test system, the test assembly comprises: a test sensor, which is used for acquiring a rotation speed signal of a driving wheel; and a wire harness, one end of the wire harness is connected with the test sensor, and the other end of the wire harness is adapted to be connected with a wheel speed sensor. According to the test assembly, the test sensor is used for acquiring the rotation speed signal of the driving wheel, one end of the wire harness is connected with the test sensor, and the other end of the wire harness is adapted to be connected with the wheel speed sensor, so that the rotation speed signal of the driving wheel acquired by the test sensor is transmitted to a wheel speed processing link of a non-driving wheel through the wire harness, the brake electronic control unit considers that the rotation speed of the driving wheel and the rotation speed of the non-driving wheel are the same, thus, error reporting of the brake electronic control unit is avoided, the test is ensured to be carried out smoothly, and the reliability of a test system using the test assembly is improved.

Description

Technical Field

[0001] This application relates to the field of vehicle testing technology, and in particular to a testing component and testing system. Background Technology

[0002] A chassis dynamometer is an indoor bench testing device used to evaluate vehicle power performance, multi-condition emission characteristics, and fuel economy. It simulates a road surface using rollers, calculates road simulation equations, and uses a loading device to simulate various vehicle operating conditions. The advantages of a chassis dynamometer are its ease of operation and the fact that test results are unaffected by environmental factors, allowing for rapid performance diagnosis of various systems and components without disassembling the vehicle. However, when testing two-wheel-drive vehicles, the difference in rotational speed between the drive and non-drive wheels can cause errors in the brake control unit, complicating the testing process. Utility Model Content

[0003] This application provides a testing component designed to prevent brake control unit errors during chassis dynamometer testing and ensure the smooth progress of the test.

[0004] This application also proposes a testing system, which includes the testing components described above.

[0005] A test component according to an embodiment of this application is used to test a vehicle, the vehicle including drive wheels and non-drive wheels, the non-drive wheels having wheel speed sensors, the test component including: a test sensor for acquiring the rotational speed signal of the drive wheels; and a wiring harness, one end of which is connected to the test sensor, and the other end of which is adapted to be connected to the wheel speed sensor.

[0006] According to the test component of this application embodiment, the rotational speed signal of the drive wheel is obtained through a test sensor. One end of the wiring harness is connected to the test sensor, and the other end is adapted to be connected to the wheel speed sensor, so that the rotational speed signal of the drive wheel obtained by the test sensor is transmitted to the wheel speed processing link of the non-drive wheel through the wiring harness, so that the brake control unit considers that the rotational speed of the drive wheel and the non-drive wheel is the same, thereby avoiding errors in the brake control unit, ensuring the smooth progress of the test, and improving the reliability of the test system using this test component.

[0007] In some embodiments of this application, the test sensor includes: a sensing element adapted to be connected to the drive wheel, the sensing element rotating synchronously with the drive wheel and generating a magnetic change; and a sensor body fixed relative to the vehicle body for receiving the magnetic signal emitted by the sensing element, with one end of the wiring harness away from the wheel speed sensor connected to the sensor body. Thus, when the drive wheel rotates, the sensing element rotates synchronously with the drive wheel and generates a changing magnetic signal. The sensor body receives the magnetic signal generated by the sensing element and converts it into an electrical signal to obtain the rotational speed of the drive wheel based on the electrical signal, thereby enabling the test sensor to obtain the rotation of the drive wheel.

[0008] In some embodiments of this application, a wheel speed fixture is further included, which is sleeved around the sensing element. The sensor body is connected to the wheel speed fixture, and the wheel speed fixture is fixed relative to the vehicle body. This fixes the sensor body relative to the vehicle body, thereby ensuring the stability of the magnetic signal received by the sensor body and ensuring the reliability of the test sensor in obtaining the rotational speed of the drive wheel.

[0009] In some embodiments of this application, the wheel speed fixture includes: an assembly fixture, which is sleeved on the sensing element and connected to the sensor body; an adjustment fixture, which extends vertically; and a positioning fixture, which extends horizontally and is adapted to connect to the vehicle body. The adjustment fixture is connected to both the positioning fixture and the assembly fixture. This ensures that the relative position of the sensor body and the sensing element is fixed, thereby ensuring that the sensor body is fixed relative to the vehicle body, and further ensuring the stability of the magnetic signal received by the sensor body.

[0010] In some embodiments of this application, the positioning fixture has a magnetic suction component, which is adapted to magnetically connect with the vehicle body. Magnetic connection offers advantages such as simple connection and easy disassembly, simplifying the assembly of test components and improving efficiency.

[0011] In some embodiments of this application, the assembly fixture includes a body and a mounting portion. The body is sleeved around the sensing element and connected to the adjustment fixture. The mounting portion is connected to the body and spaced apart from the adjustment fixture along the circumferential direction of the body. The mounting portion is connected to the sensor body. This ensures the relative positional stability of the sensor body and the sensing element, improves overall reliability, optimizes the overall structure of the assembly fixture, reduces interference from the adjustment fixture on the sensor body, and further improves reliability.

[0012] In some embodiments of this application, a mounting fixture is further included, which is connected to both the inductive element and the drive wheel. The mounting fixture transmits the rotation of the drive wheel to the inductive element, thereby enabling the inductive element to rotate synchronously with the drive wheel and generate a changing magnetic signal.

[0013] In some embodiments of this application, the mounting fixture includes: a mounting hub connected to the hub of the drive wheel, with the sensing element sleeved outside the mounting hub; and a bearing sleeved outside the sensing element. When the drive wheel rotates, the hub of the drive wheel transmits the rotation of the drive wheel to the mounting hub, which in turn transmits the rotation to the sensing element, which then transmits the rotation to the bearing, thereby achieving synchronous rotation of the sensing element and the drive wheel and generating a changing magnetic signal.

[0014] The test system according to the embodiments of this application includes the test components described above.

[0015] According to the test system of this application embodiment, a test component is set up to acquire the rotational speed signal of the drive wheel through a test sensor. One end of the wiring harness is connected to the test sensor, and the other end is adapted to be connected to the wheel speed sensor, so that the rotational speed signal of the drive wheel acquired by the test sensor is transmitted to the wheel speed processing link of the non-drive wheel through the wiring harness, so that the brake control unit considers that the rotational speed of the drive wheel and the non-drive wheel is the same, thereby avoiding errors in the brake control unit, ensuring the smooth progress of the test system, and improving reliability. Attached Figure Description

[0016] Figure 1 This is a structural diagram of a test component and drive wheel provided in an embodiment of this application;

[0017] Figure 2 yes Figure 1 Enlarged view of point A in the middle;

[0018] Figure 3 This is a structural diagram of an assembly tooling provided in an embodiment of this application;

[0019] Figure 4 This is a front view of an assembly tooling provided in an embodiment of this application;

[0020] Figure 5 It is along Figure 4 Sectional view of the middle BB line;

[0021] Figure 6 This is a structural diagram of an adjustment fixture provided in an embodiment of this application;

[0022] Figure 7 This is a front view of an adjustment fixture provided in an embodiment of this application;

[0023] Figure 8 It is along Figure 7 A cross-sectional view of the CC line;

[0024] Figure 9 This is a structural diagram of a magnetic suction component provided in an embodiment of this application.

[0025] Explanation of reference numerals in the attached figures:

[0026] 100. Test components;

[0027] 1. Test sensor; 11. Inductive element; 12. Sensor body;

[0028] 2. Wheel speed fixture; 21. Assembly fixture; 211. Body part; 212. Mounting part; 22. Adjustment fixture; 221. Mounting plate; 23. Positioning fixture; 231. Magnetic suction component; 2311. Assembly part;

[0029] 3. Install tooling; 31. Install wheel hub; 32. Bearing;

[0030] 200. Drive wheel;

[0031] 201. Wheel hub. Detailed Implementation

[0032] To make the technical problems, technical solutions, and beneficial effects solved by this application clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0033] The following description, with reference to the accompanying drawings, describes a test component 100 according to an embodiment of the present invention.

[0034] like Figure 1 and Figure 2 As shown, a test component 100 according to an embodiment of the present invention is used to test a vehicle. The vehicle includes drive wheels 200 and non-drive wheels, and the non-drive wheels have wheel speed sensors. It is understood that the vehicle with drive wheels 200 and non-drive wheels is a two-wheel drive vehicle. When the chassis dynamometer tests the vehicle by passing a roller to simulate a road surface, the drive wheels 200 rotate, while the non-drive wheels do not rotate.

[0035] The test component 100 includes a test sensor 1 and a wiring harness (not shown in the figure). The test sensor 1 is used to acquire the rotational speed signal of the drive wheel 200. One end of the wiring harness is connected to the test sensor 1, and the other end is adapted to connect to the wheel speed sensor. It is understood that before testing the wheel speed sensor of the non-drive wheel, the wiring harness connected to the ECU needs to be disconnected. One end of the wiring harness is connected to the test sensor 1, and the other end is connected to the wheel speed sensor. This allows the rotational speed signal of the drive wheel 200 acquired by the test sensor 1 to be transmitted through the wiring harness to the wheel speed processing link of the non-drive wheel. This makes the brake control unit believe that the rotational speeds of the drive wheel 200 and the non-drive wheel are the same, thereby avoiding errors from the brake control unit, ensuring smooth testing, improving the reliability of the test system using this test component 100, and the test component 100 has a simple structure, effectively reducing development costs.

[0036] Furthermore, the wiring harness is connected to the wiring harness end of the wheel speed sensor so that the rotational speed signal of the drive wheel 200 acquired by the test sensor 1 is transmitted through the wiring harness to the wheel speed processing link of the non-drive wheel.

[0037] It should be noted that when the front wheels of the vehicle are drive wheels 200, the rear wheel speed sensor is a wheel speed sensor, the test sensor 1 acquires the rotational speed signal of the front wheel, and the wiring harness is connected to the rear wheel speed sensor; when the rear wheels of the vehicle are drive wheels 200, the wheel speed sensor is a wheel speed sensor, the test sensor 1 acquires the rotational speed signal of the rear wheel, and the wiring harness is connected to the wheel speed sensor.

[0038] According to the test component 100 of this utility model embodiment, the test sensor 1 is used to acquire the rotational speed signal of the drive wheel 200. One end of the wiring harness is connected to the test sensor 1, and the other end is adapted to be connected to the wheel speed sensor, so that the rotational speed signal of the drive wheel 200 acquired by the test sensor 1 is transmitted to the wheel speed processing link of the non-drive wheel through the wiring harness, so that the brake control unit considers that the rotational speed of the drive wheel 200 and the non-drive wheel is the same, thereby avoiding the brake control unit from reporting errors, ensuring the smooth progress of the test, and improving the reliability of the test system using the test component 100.

[0039] In some embodiments of this utility model, such as Figure 2 As shown, the test sensor 1 includes a sensing element 11 and a sensor body 12. The sensing element 11 is adapted to be connected to the drive wheel 200. The sensing element 11 rotates synchronously with the drive wheel 200 and generates magnetic changes. The sensor body 12 is fixed relative to the vehicle body and is used to receive the magnetic signal emitted by the sensing element 11. The end of the wiring harness away from the wheel speed sensor is connected to the sensor body 12.

[0040] Therefore, when the drive wheel 200 rotates, the sensing element 11 rotates synchronously with the drive wheel 200 and generates a magnetic change. The sensor body 12 receives the magnetic signal generated by the sensing element 11 and converts the magnetic signal into an electrical signal to obtain the rotation speed of the drive wheel 200 based on the electrical signal, thereby enabling the test sensor 1 to obtain the rotation of the drive wheel 200.

[0041] Meanwhile, the end of the wiring harness away from the wheel speed sensor is connected to the sensor body 12, so that the sensor body 12 can transmit the acquired rotational speed signal of the drive wheel 200 to the wheel speed processing link of the non-drive wheel, so that the brake control unit thinks that the rotational speed of the drive wheel 200 and the non-drive wheel are the same.

[0042] In addition, since the sensing element 11 rotates synchronously with the drive wheel 200, and the sensor body 12 is fixed relative to the vehicle body to form a stable relative relationship, the stability of the magnetic signal received by the sensor body 12 is ensured, thereby ensuring that the test sensor 1 can reliably obtain the rotational speed of the drive wheel 200, and further avoiding errors from the brake control unit.

[0043] Optionally, the inductive element 11 can be a magnetic encoder or other magnetic element that can produce magnetic changes.

[0044] In some embodiments of this utility model, such as Figure 1 and Figure 2 As shown, the test assembly 100 also includes a wheel speed fixture 2. The wheel speed fixture 2 is fitted around the sensing element 11, and the sensor body 12 is connected to the wheel speed fixture 2. The wheel speed fixture 2 is fixed relative to the vehicle body.

[0045] Therefore, by connecting the sensor body 12 to the wheel speed fixture 2 and fixing it relative to the vehicle body, the sensor body 12 is fixed relative to the vehicle body, thus ensuring the stability of the magnetic signal received by the sensor body 12, and consequently ensuring the reliability of the rotational speed of the drive wheel 200 obtained by the test sensor 1. Simultaneously, by fitting the wheel speed fixture 2 around the sensing element 11, the sensor body 12 can be more stably and accurately fixed near the sensing element 11, further optimizing the magnetic signal reception effect and improving reliability.

[0046] In some embodiments of this utility model, such as Figures 1-8 As shown, the wheel speed fixture 2 includes an assembly fixture 21, an adjustment fixture 22, and a positioning fixture 23. The assembly fixture 21 is sleeved on the outside of the sensing element 11 and connected to the sensor body 12. The adjustment fixture 22 extends vertically, and the positioning fixture 23 extends horizontally and is suitable for connection to the vehicle body. The adjustment fixture 22 is connected to both the positioning fixture 23 and the assembly fixture 21.

[0047] Therefore, the positioning fixture 23 extends horizontally and connects to the vehicle body to form a basic fixed plane, eliminating horizontal displacement. By adjusting the vertical extension of the fixture 22 and connecting it to the assembly fixture 21, the height can be adjusted so that the test component 100 can adapt to the chassis height of different vehicle models, improving versatility. Furthermore, by fitting the assembly fixture 21 around the sensing element 11 and connecting it to the sensor body 12, the relative position of the sensor body 12 and the sensing element 11 is fixed, thereby ensuring that the sensor body 12 is fixed relative to the vehicle body and further ensuring the stability of the magnetic signal received by the sensor body 12.

[0048] It should be noted that the specific structure of the wheel speed fixture 2 in this application is not limited to this. It may also include an assembly fixture 21 and a cantilever. One end of the cantilever is connected to the assembly fixture 21, and the other end is fixed to the floor of the test compartment, thereby achieving the fixation of the wheel speed fixture 2 relative to the vehicle body.

[0049] In some embodiments of this utility model, such as Figure 1 and Figure 9 As shown, the positioning fixture 23 has a magnetic suction component 231, which is adapted to be magnetically connected to the vehicle body. Thus, the magnetic suction component 231 achieves a reliable connection between the positioning fixture 23 and the vehicle body, while also offering advantages such as simple connection and easy disassembly, simplifying the assembly of the test component 100 and improving efficiency. Optionally, the magnetic suction component 231 is adapted to be magnetically connected to the vehicle's fender.

[0050] Specifically, the positioning fixture 23 includes a body and a magnetic suction component 231. The magnetic suction component 231 has an assembly part 2311, which is connected to the body so that the crossbeam fixture can be magnetically attached to the vehicle body. Furthermore, the assembly part 2311 and the body are threadedly connected to ensure the reliability of their connection.

[0051] In some embodiments of this utility model, such as Figures 2-5 As shown, the assembly fixture 21 includes a body part 211 and a mounting part 212. The body part 211 is sleeved on the outside of the sensing element 11 and connected to the adjustment fixture 22. The mounting part 212 is connected to the body part 211 and is spaced apart from the adjustment fixture 22 along the circumferential direction of the body part 211. The mounting part 212 is connected to the sensor body 12.

[0052] Therefore, by forming a main load-bearing structure with the main body 211 and the adjustment fixture 22, the relative position of the sensor body 12 and the sensing element 11 is kept stable, thus improving overall reliability. At the same time, by connecting the mounting part 212 to the main body 211 and spaced apart from the adjustment fixture 22 along the circumferential direction of the main body 211, the overall structure of the assembly fixture 21 is optimized, reducing the interference of the adjustment fixture 22 on the sensor body 12 and further improving reliability.

[0053] Furthermore, such as Figures 2-6 As shown, the sensor body 12 is connected to the mounting part 212 via fasteners, thereby achieving a fixed connection between the sensor body 12 and the mounting part 212 and improving reliability. The adjustment fixture 22 has a mounting plate 221, which is connected to the body part 211 via fasteners, thereby achieving a fixed connection between the adjustment fixture 22 and the body part 211 and improving reliability.

[0054] In some embodiments of this utility model, such as Figure 2 As shown, the test assembly 100 also includes a mounting fixture 3. The mounting fixture 3 is connected to both the sensing element 11 and the drive wheel 200. Thus, when the drive wheel 200 rotates, the mounting fixture 3 transmits the rotation of the drive wheel 200 to the sensing element 11, enabling the sensing element 11 to rotate synchronously with the drive wheel 200 and generate a changing magnetic signal. This allows the sensor body 12 to receive the magnetic signal generated by the sensing element 11 and convert it into an electrical signal. Based on the electrical signal, the rotational speed of the drive wheel 200 is obtained, thereby enabling the test sensor 1 to acquire the rotation of the drive wheel 200.

[0055] In some embodiments of this utility model, such as Figure 2 As shown, the mounting fixture 3 includes a mounting hub 31 and a bearing 32. The mounting hub 31 is connected to the wheel hub 201 of the drive wheel 200. The sensing element 11 is sleeved on the mounting hub 31, and the bearing 32 is sleeved on the sensing element 11. Thus, when the drive wheel 200 rotates, the wheel hub 201 of the drive wheel 200 transmits the rotation of the drive wheel 200 to the mounting hub 31, which in turn transmits the rotation to the sensing element 11, which in turn transmits the rotation to the bearing 32. This achieves synchronous rotation of the sensing element 11 and the drive wheel 200, generating a changing magnetic signal.

[0056] Furthermore, the mounting hub 31 is connected to the wheel hub 201 by fasteners, thereby connecting the mounting fixture 3 to the drive wheel 200 and improving reliability.

[0057] In some embodiments of this invention, the test assembly 100 further includes a wheel speed fixture 2. The wheel speed fixture 2 is sleeved outside the bearing 32, and the sensor body 12 is connected to the wheel speed fixture 2, which is fixed relative to the vehicle body. This arrangement ensures that the sensor body 12 is fixed relative to the vehicle body, and that the relative position of the sensor body 12 and the sensing element 11 is fixed, thereby guaranteeing the stability of the magnetic signal received by the sensor body 12, and thus ensuring the reliability of the test sensor 1 in acquiring the rotational speed of the drive wheel 200.

[0058] Furthermore, the outer wall of bearing 32 has a bearing seat, which is connected to the wheel speed fixture 2. It is understood that the bearing seat is fixed relative to the vehicle body. The connection between the bearing seat and the wheel speed fixture 2 further ensures the positional stability and reliability of the wheel speed fixture 2, further ensures the relative positional fixation of the sensor body 12 and the sensing element 11, and further ensures the stability of the magnetic signal received by the sensor body 12. Optionally, the assembly fixture 21 connecting the bearing seat and the wheel speed fixture 2 is connected by cable ties, ensuring reliable connection while reducing assembly difficulty.

[0059] In some embodiments of this invention, the length direction of the sensor body 12 is parallel or perpendicular to the axis of the sensing element 11. It is understood that, since the sensing element 11 can have radial / axial magnetic poles, the length direction of the sensor body 12 is arranged with the corresponding magnetic poles, thereby improving the versatility of the test assembly 100. For example, as... Figure 2 As shown, the length direction of the sensor body 12 is perpendicular to the axis of the sensing element 11.

[0060] The testing system of this utility model is described below.

[0061] The testing system according to an embodiment of the present invention includes a chassis dynamometer and a testing component 100.

[0062] Specifically, the chassis dynamometer uses rollers to simulate the road surface, and the various resistances encountered by the vehicle during normal constant speed driving are simulated by a loading device. The resistance experienced by the vehicle during acceleration and coasting is simulated by the rotational inertia of the flywheel assembly. The torque and power of the chassis dynamometer are measured by force sensors mounted on a lever arm connecting the stator and the dynamometer housing. The vehicle drives the rollers, and the loading device applies a braking torque to the rotor through the stator. Simultaneously, the stator experiences a reaction torque from the rotor, which is measured by the force sensors and converted into the torque and power of the drive wheel 200.

[0063] The test sensor 1 of the test assembly 100 is used to acquire the rotational speed signal of the drive wheel 200. One end of the wiring harness is connected to the test sensor 1, and the other end is adapted to be connected to the wheel speed sensor, so that the rotational speed signal of the drive wheel 200 acquired by the test sensor 1 is transmitted to the wheel speed processing link of the non-drive wheel through the wiring harness, so that the brake control unit considers that the rotational speed of the drive wheel 200 and the non-drive wheel is the same, thereby avoiding errors in the brake control unit, ensuring the smooth progress of the test, improving the reliability of the test system using the test assembly 100, and the test assembly 100 has a simple structure, effectively reducing the research and development cost.

[0064] According to the test system of this utility model embodiment, a test component 100 is set up, and a test sensor 1 is used to obtain the rotational speed signal of the drive wheel 200. One end of the wiring harness is connected to the test sensor 1, and the other end is adapted to be connected to the wheel speed sensor, so that the rotational speed signal of the drive wheel 200 obtained by the test sensor 1 is transmitted to the wheel speed processing link of the non-drive wheel through the wiring harness, so that the brake control unit considers that the rotational speed of the drive wheel 200 and the non-drive wheel is the same, thereby avoiding errors in the brake control unit, ensuring the smooth progress of the test system, and improving reliability.

[0065] Other components of the chassis dynamometer according to the embodiments of this utility model are known to those skilled in the art and will not be described in detail here.

[0066] In this application, and in the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0067] In this application, unless otherwise expressly defined, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0068] The terms “first,” “second,” “third,” “fourth,” etc., in this application (if present) are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0069] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0070] Unless otherwise specified, all steps in this application may be performed sequentially or randomly. For example, if the method includes steps A and B, it means that the method may include steps A and B performed sequentially, or it may include steps B and A performed sequentially. For example, if the method may also include step C, it means that step C may be added to the method in any order. For example, the method may include steps A, B, and C, or it may include steps A, C, and B, or it may include steps C, A, and B, etc.

[0071] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A test component, characterized in that, For testing a vehicle, the vehicle including drive wheels and non-drive wheels, the non-drive wheels having wheel speed sensors, the testing components including: A test sensor is used to acquire the rotational speed signal of the drive wheel; A wiring harness, one end of which is connected to the test sensor, and the other end of which is adapted to be connected to the wheel speed sensor.

2. The test component according to claim 1, characterized in that, The test sensor includes: A sensing element, adapted to be connected to the drive wheel, the sensing element rotating synchronously with the drive wheel and generating magnetic changes; a sensor body, fixed relative to the vehicle body, for receiving magnetic signals emitted by the sensing element, and the end of the wiring harness away from the wheel speed sensor connected to the sensor body.

3. The test component according to claim 2, characterized in that, Also includes: A wheel speed fixture is fitted over the sensing element, the sensor body is connected to the wheel speed fixture, and the wheel speed fixture is fixed relative to the vehicle body.

4. The test component according to claim 3, characterized in that, The wheel speed fixture includes: An assembly fixture, which is fitted over the sensing element and connected to the sensor body; An adjusting fixture that extends vertically; A positioning fixture extends horizontally and is adapted to be connected to the vehicle body; an adjustment fixture is connected to both the positioning fixture and the assembly fixture.

5. The test component according to claim 4, characterized in that, The positioning fixture has a magnetic suction component, which is adapted to be magnetically connected to the vehicle body.

6. The test component according to claim 4, characterized in that, The assembly fixture includes a body and a mounting part. The body is sleeved on the outside of the sensing element and connected to the adjustment fixture. The mounting part is connected to the body and is spaced apart from the adjustment fixture along the circumferential direction of the body. The mounting part is connected to the sensor body.

7. The test component according to any one of claims 2-6, characterized in that, Also includes: The mounting fixture is connected to the inductive element and the drive wheel respectively.

8. The test component according to claim 7, characterized in that, The installation fixture includes: The mounting hub is connected to the wheel hub of the drive wheel, and the sensing element is sleeved on the outside of the mounting hub; A bearing, which is sleeved on the outside of the inductive element.

9. A testing system, characterized in that, include: Chassis dynamometer; The test component according to any one of claims 1-8.

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