New energy vehicle electromagnetic compatibility testing system

Abstract

The present invention discloses an electromagnetic compatibility testing system for new energy vehicles, comprising a dynamometer and a mobile magnetic sensing mechanism disposed on both sides of the dynamometer. The mobile magnetic sensing mechanism comprises a first linear slide, a first curved slide, a magnetic sensing bracket, an electromagnetic sensor, a power rod, a linear guide rod, and a drive motor. The first linear slide rail is disposed on the outer side of the first curved slide rail. The electromagnetic sensor is fixed to the magnetic sensing bracket and slides along the first linear slide rail. The drive motor is disposed in an EMC isolation basement compartment and drives the power rod to rotate so that the head end of the power rod slides along the first curved slide rail. A rotating slip ring is rotatably connected to the head end of the power rod. One end of the linear guide rod is fixedly connected to the magnetic sensing bracket, and the other end is disposed within the rotating slip ring. When the power rod rotates, it pushes the linear guide rod to move along the first linear slide rail. The present invention can achieve multi-position measurement of the electromagnetic sensor and the vehicle under test in a relative motion state, and reduces the influence of the drive motor on the electromagnetic sensor.

Description

Technical Field

[0001] The present invention relates to a vehicle electromagnetic compatibility detection system, in particular to an electromagnetic compatibility detection system for new energy vehicles. Background Art

[0002] To reduce energy consumption, emissions, and oil dependence, China is actively promoting the use of new energy vehicles. As the number of new energy vehicles increases, the differences between new energy vehicle testing and traditional vehicle testing are attracting attention from relevant testing agencies. Because new energy vehicles utilize a large number of electric component assemblies, their electromagnetic compatibility (EMC) has drawn considerable attention. The government has issued the relevant standard, "GB / T 18387-2017 Electric Vehicles - Limits and Measurement Methods of Electromagnetic Field Emission Intensity," to guide the EMC testing of new energy vehicles.

[0003] This testing system has specific regulations for electric field strength emission limits and magnetic field strength emission limits, and has specific descriptions and regulations for the antenna position and scanning receiver of the testing test system. This system only provides a certain principle description of the electromagnetic compatibility testing method for new energy vehicles and provides a schematic diagram of the corresponding testing method.

[0004] When testing electromagnetic compatibility (EMC) for new energy vehicles, different parts of the vehicle will have varying EMC emission intensities. Furthermore, changes in the vehicle's motion state (i.e., relative speed) with the detection sensor will also generate corresponding EMC emission intensities. However, national standards and other existing technical solutions make it difficult to measure EMC when the sensor and vehicle are in relative motion, making it impossible to monitor EMC emission intensities at any location at any given speed. Summary of the Invention

[0005] In response to the above-mentioned defects in the existing technology, the task of the present invention is to provide an electromagnetic compatibility detection system for new energy vehicles, which can realize the change of relative speed between the sensor and the vehicle and meet the need to monitor the electromagnetic field emission intensity at any position at any time as the relative motion state changes.

[0006] The technical solution of the present invention is as follows: A new energy vehicle electromagnetic compatibility detection system includes a dynamometer and a mobile magnetic sensing mechanism arranged on both sides of the dynamometer, the mobile magnetic sensing mechanism including a first linear slide, a first curved slide, a magnetic sensing bracket, an electromagnetic sensor, a power rod, a linear guide rod and a drive motor, the first linear slide rail is arranged on the outer side of the arc of the first curved slide rail, the magnetic sensing bracket is arranged on the first linear slide rail and slides along the first linear slide rail, the electromagnetic sensor is fixedly installed on the magnetic sensing bracket, the drive motor is arranged in an EMC isolation basement, the drive shaft of the drive motor is connected to the end of the power rod, the drive motor drives the power rod to rotate so that the head end of the power rod slides along the first curved slide rail, a rotating slip ring is rotatably connected to the head end of the power rod, and the rotating axis of the rotating connection is perpendicular to the rotation plane of the power rod, one end of the linear guide rod is fixedly connected to the magnetic sensing bracket, and the other end of the linear guide rod is inserted into the rotating slip ring. When the power rod rotates, it pushes the linear guide rod to move along the first linear slide rail.

[0007] Furthermore, it includes a controller, which is electrically connected to the electromagnetic sensor and receives the signal of the electromagnetic sensor. The controller is electrically connected to the central processing unit of the vehicle to be tested and the drive motor to obtain the speed of the vehicle to be tested and control the speed of the drive motor.

[0008] Furthermore, in order to improve the movement stability of the electromagnetic sensor, the mobile magnetic sensing mechanism includes a second linear slide rail, which is parallel to the first linear slide rail and is arranged above the first linear slide rail. The lower end of the magnetic sensing bracket moves along the first linear slide rail, and the upper end of the magnetic sensing bracket moves along the second linear slide rail.

[0009] Furthermore, the head end of the power rod is connected to a first support seat, the first support seat is vertically arranged on the first arc-shaped slide rail and slides along the first arc-shaped slide rail, and the top of the first support seat is rotatably connected to the rotating slip ring.

[0010] Furthermore, in order to reduce friction between the linear guide rod and the rotating slip ring, the linear guide rod is connected to the rotating slip ring via a linear bearing.

[0011] Furthermore, in order to obtain a sufficient electromagnetic sensor moving speed through a smaller motor speed, the power rod is longer, so the power rod needs to be supported at multiple points, including a second arc-shaped slide rail, the second arc-shaped slide rail is located between the first arc-shaped slide rail and the drive motor, the second arc-shaped slide rail is arranged concentrically with the first arc-shaped slide rail, and a second support seat is arranged in the middle of the power rod, and the second support seat is arranged on the second arc-shaped slide rail and slides along the second arc-shaped slide rail.

[0012] Furthermore, the power rod comprises a third curved rail fixed to the top of the EMC isolation basement compartment and arranged concentrically with the first curved rail. A third support seat is provided at the end of the power rod, and the third support seat is arranged on the third curved rail and slides along the third curved rail. The first curved rail, the second curved rail, and the third curved rail form a three-point support for the power rod.

[0013] The advantages of the present invention compared with the prior art are:

[0014] The present invention drives the power rod to rotate by a driving motor, thereby pushing the magnetic sensor bracket to move by the linear guide rod, which can easily meet the measurement requirements of the electromagnetic sensor and the waiting new energy vehicle in a state of relative motion, and can timely adjust the movement speed of the magnetic sensor bracket and the inductive electromagnetic sensor according to the movement state of the new energy vehicle; the movement of the electromagnetic sensor can measure the electromagnetic field emitted at different positions on both sides of the new energy vehicle as needed, and relatively comprehensively measure the electromagnetic compatibility of the new energy vehicle; the rotation of the driving motor is converted into the linear motion of the magnetic sensor bracket by cooperating with the power rod and the linear guide rod, and the longer power rod can convert the smaller rotational angular velocity of the driving motor into a larger linear velocity, while keeping the driving motor away from the magnetic sensor bracket, and combined with the EMC isolation underground warehouse method to avoid the electromagnetic field of electronic equipment such as the driving motor from affecting the measurement results as much as possible. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 Schematic diagram of the top view of the electromagnetic compatibility detection system for new energy vehicles according to an embodiment of the present invention.

[0016] Figure 2 Schematic diagram of the structure of the mobile magnetic sensing mechanism.

[0017] Figure 3 This is a schematic diagram of the local structure of the mobile magnetic sensing mechanism at the head end of the power rod.

[0018] Figure 4 Schematic diagram of the middle structure of the power rod of the mobile magnetic sensing mechanism.

[0019] Figure 5 This is a schematic diagram of the connection structure between the driving motor and the power rod of the mobile magnetic sensing mechanism. DETAILED DESCRIPTION

[0020] The present invention will be further described below with reference to the examples, but are not intended to limit the present invention.

[0021] Please combine Figures 1 to 5As shown, the electromagnetic compatibility testing system for new energy vehicles involved in an embodiment of the present invention includes a dynamometer 1 and a mobile magnetic sensing mechanism arranged on both sides of the dynamometer 1. The dynamometer 1 is an existing device, which is installed on the ground to support the vehicle to be tested so that the vehicle to be tested can operate in place under various driving conditions. The mobile magnetic sensing mechanism is used to measure the electromagnetic signals emitted by the vehicle to be tested under various driving conditions. The mobile magnetic sensing mechanism includes a first linear slide 2, a second linear slide 3, a first curved slide 4, a second curved slide 5, a third curved slide 6, a magnetic sensing bracket 7, an inductive electromagnetic sensor 8, a power rod 9, a linear guide rod 10, a drive motor 11 and a controller 12. The first linear slide 2 is arranged on the outer side of the arc of the first curved slide 4, and the curvature direction of the first curved slide 4 is away from the dynamometer 1, that is, the first linear slide 2 is closer to the dynamometer 1 than the first curved slide 4. The first linear guide rail 2 is mounted on the ground parallel to the front-to-back direction of the vehicle under test. The second linear guide rail 3 is positioned above the first linear guide rail 2 and parallel to the first linear guide rail 2. In this embodiment, both the first linear guide rail 2 and the second linear guide rail 3 utilize HIWIN silent guide rails. The lower end of the magnetic sensor bracket 7 is connected to the first linear guide rail 2 via bolts provided by the HIWIN silent guide rail, and the upper end of the magnetic sensor bracket 7 is connected to the second linear guide rail 3 via bolts provided by the HIWIN silent guide rail. The inductive electromagnetic sensor 8 is fixed to the magnetic sensor bracket 7 and moves along the first linear guide rail 2 as the magnetic sensor bracket 7 moves, that is, the inductive electromagnetic sensor 8 can move to the side of the vehicle under test to reach various test positions. The inductive electromagnetic sensor 8 is connected to the spiral inductive magnetic sensor line 13 for signal output.

[0022] The magnetic sensor bracket 7 is driven by a driving motor 11 to drive the power rod 9 to rotate, and then is driven to move by a linear guide rod 10 that moves with the power rod 9. Figures 3 to 5As shown, the first arc-shaped slide rail 4 is installed on the ground by anchor bolts. The first arc-shaped slide rail 4 is provided with a first arc-shaped guide groove 401. The head end of the power rod 9 is interference-connected with the inner bearing ring of the silent ball bearing 14. The silent ball bearing 14 is interference-fitted with the inner hole of the first support seat 15. The lower end shaft of the first support seat 15 is interference-connected with the inner hole of the first guide rail silent cylindrical bearing 16. The first guide rail silent cylindrical bearing 16 is located in the first arc-shaped guide groove 401, so that the head end of the power rod 9 can move along the first arc-shaped slide rail 4. A connecting groove is provided at the top of the first support seat 15. The lower end shaft of a rotating slip ring 17 is connected to the connecting groove through a silent cylindrical bearing 18, so that the rotating slip ring 17 and the head end of the power rod 9 form a rotating connection. The rotating axis of the rotating slip ring 17 is perpendicular to the moving plane of the head end of the power rod 9. A silent linear bearing 19 is provided in the hole of the rotating slip ring 17. One end of the linear guide rod 10 perpendicular to the first linear slide 2 is passed through the silent linear bearing 19 and connected to it. The other end of the linear guide rod 10 is fixedly connected to the magnetic sensor bracket 7 via two linear guide rod 10 nuts. When the head end of the power rod 9 moves along the first curved slide 4, it will drive the linear guide rod 10 to move. Since the distance between the first curved slide 4 and the first linear slide 2 is changing, that is, the distance between the rotating slip ring 17 at the head end of the power rod 9 and the magnetic sensor bracket 7 is changing, the movement of the power rod 9 causes the linear guide rod 10 to move axially relative to the rotating slip ring 17. At the same time, the linear guide rod 10 also pushes the magnetic sensor bracket 7 to move along the first linear slide 2.

[0023] The rotation of the power rod 9 is driven by the drive motor 11. Since the inductive electromagnetic sensor 8 needs to have a faster moving speed relative to the vehicle to be tested, the power rod 9 needs to be set longer to increase the rotation radius and increase the linear speed. A second support seat 20 is set in the middle of the power rod 9. Accordingly, a second arc-shaped slide 5 is installed on the ground through anchor bolts. The second arc-shaped slide 5 and the first arc-shaped slide 4 are arranged in a concentric circle. A second arc-shaped guide groove 501 is opened on the second arc-shaped slide 5. The lower end shaft of the second support seat 20 is connected to the silent ball bearing 21. The silent ball bearing 21 is set in the second arc-shaped guide groove 501, so that the second support seat 20 can move along the second arc-shaped slide 5. The power rod 9 is connected to the second support seat 20 through a silent linear bearing 22. The end of the power rod 9 is connected to the drive motor 11. Specifically, the drive motor 11 is connected to the motor bracket 23 by bolts, and the motor bracket 23 is welded to the EMC isolation basement 24 as a whole. The rotating shaft of the drive motor 11 is connected to the connecting sleeve 26 via a key 25, and the connecting sleeve 26 is connected to the external coupling shaft 28 via a key 27. The angular displacement sensor 29 is sleeved on the external coupling shaft 28, and the angular displacement sensor 29 is fastened to the third arc-shaped slide rail 6 by fastening bolts passing through the EMC isolation basement 24. The EMC isolation and silent sealing ring 30 is directly installed in the EMC isolation basement 24, and the external coupling shaft passes through the EMC isolation and silent sealing ring 30 and is connected to the end of the power rod 9 via the external coupling shaft key 31. The lower end of the end rod head of the power rod 9 fits into the step of the external coupling shaft 28. The third arc-shaped slide rail 6 is located on the top of the EMC isolation basement 24. The third arc-shaped slide rail 6 and the first arc-shaped slide rail 4 are arranged in a concentric circle. The third arc-shaped guide groove 601 is opened on the third arc-shaped slide rail 6, and the guide rail bearing 32 is installed in the bearing seat of the third arc-shaped slide rail 6. The external coupling shaft 28 is connected to the guide rail bearing 32. Two silent cone bearings 33 are mounted back-to-back within the third support seat 34. The inner ring of one silent cone bearing 22 rests against the step at the end of the power rod 9. The preload of the other silent cone bearing 33 is adjusted via a support adjustment ring 35, which is internally threaded and connected to the third support seat 34. The protruding shaft at the lower end of the third support seat 34 is connected to the first support silent cylindrical bearing 36, which is mounted in the third arcuate guide groove 601 of the third arcuate slide rail 6. The shaft of the power rod 9 and the distal end of the power rod 9 are integrally formed by extrusion.

[0024] The controller 12 is electrically connected to the electromagnetic sensor 8 and receives the signal from the electromagnetic sensor 8 to record the electromagnetic data of the vehicle to be tested. The controller 12 is electrically connected to the central processing unit, angular displacement sensor 29 and drive motor 11 of the vehicle to be tested to obtain the speed of the vehicle to be tested and control the speed of the drive motor 11. The data measured by the angular displacement sensor 29 is used to control and compensate the speed of the drive motor 11, so that the moving speed of the electromagnetic sensor 8 along the first linear slide rail 2 can be maintained stable and match the speed of the vehicle to be tested.

Claims

1. A new energy vehicle electromagnetic compatibility detection system, characterized in that: The invention comprises a dynamometer, a mobile magnetic sensing mechanism and a controller arranged on both sides of the dynamometer, wherein the mobile magnetic sensing mechanism comprises a first linear slide, a second linear slide, a first curved slide, a second curved slide, a magnetic sensing bracket, an electromagnetic sensor, a power rod, a linear guide rod and a driving motor, wherein the first linear slide is arranged on the outer side of the arc of the first curved slide, and the first linear slide is arranged parallel to the front and rear direction of the vehicle to be tested, the magnetic sensing bracket is arranged on the first linear slide and slides along the first linear slide, the second linear slide is parallel to the first linear slide and is arranged above the first linear slide, the lower end of the magnetic sensing bracket moves along the first linear slide, the upper end of the magnetic sensing bracket moves along the second linear slide, the electromagnetic sensor is fixedly installed on the magnetic sensing bracket, the driving motor is arranged in an EMC isolation basement, the driving shaft of the driving motor is connected to the end of the power rod, the driving motor drives the power rod to rotate so that the head end of the power rod slides along the first curved slide, and a rotating slip ring The cam is connected to the first end of the driving mechanism, and the cam is connected to the first control block by the spring, and the cam is connected to the control block by the spring.

2. The electromagnetic compatibility detection system for new energy vehicles according to claim 1, characterized in that: The linear guide rod is connected to the rotating slip ring through a linear bearing.

3. The electromagnetic compatibility detection system for new energy vehicles according to claim 1, characterized in that: It includes a third curved slide rail, which is fixed to the top of the EMC isolation underground warehouse. The third curved slide rail is arranged concentrically with the first curved slide rail. A third support seat is set at the end of the power rod, and the third support seat is set on the third curved slide rail and slides along the third curved slide rail.

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