A kind of eddy current sensor test platform for magnetic levitation motor

Abstract

The utility model relates to a kind of eddy current sensor test platform for magnetic suspension motor, wherein, including: z-axis micrometer is installed on fixed base;X-axis micrometer is installed on fixed base;X-axis support is installed on x-axis micrometer;Fixed shaft is installed on x-axis support, fixed shaft is stretched out to the direction of z-axis micrometer, and the direction of stretching out is perpendicular to the z-axis surface of z-axis support;Z-axis support is installed on z-axis micrometer, and it has z-axis surface perpendicular to x-axis surface;Z-axis support can be moved along z-axis direction with z-axis micrometer, fixed shaft can be moved along x-axis direction with x-axis micrometer, to approach or away from z-axis support;Eddy current sensor is installed on z-axis support, measured object is installed fixed on fixed shaft;Wherein, x-axis surface is horizontal plane, and it is the plane where x-axis is located;Z-axis surface is perpendicular to x-axis surface, and it is the plane where z-axis is located.The utility model provides actual measurement platform according to the actual working condition of eddy current sensor, and better detection accuracy can be provided.

Description

Technical Field

[0001] This utility model relates to magnetic levitation motor testing technology, and in particular to a testing platform for eddy current sensors used in magnetic levitation motors. Background Technology

[0002] Eddy current sensors are non-contact displacement sensors that are based on the eddy current effect formed on the metal surface by a high-frequency magnetic field. They have the advantages of high reliability in long-term operation, high sensitivity, non-contact measurement, fast response speed, and no influence from media such as oil and water. Currently, magnetic levitation motors mostly use this type of sensor.

[0003] The output response of an eddy current sensor varies depending on the distance between the measured metal part and the sensor. Currently, the most common calibration method involves adjusting the distance between the measured object and the sensor using a slider mechanism. Existing static calibration of eddy current sensors simulates actual operating conditions by simulating a planar surface and ensuring the sensor operates in an interference-free environment. However, with increasing demands for high power density and more compact structural integration, the non-planar structures of the measured objects are becoming more complex. Existing testing structures lack sufficient accuracy and are no longer suitable for current applications and evolving needs. Utility Model Content

[0004] The purpose of this invention is to provide a testing platform for eddy current sensors used in magnetic levitation motors, in order to solve the problems of the prior art.

[0005] This utility model discloses a testing platform for an eddy current sensor for a magnetic levitation motor, comprising: a fixed base, a Z-axis micrometer, an X-axis micrometer, a base, an X-axis bracket, a Z-axis bracket, a fixed shaft, and fixing bolts; the Z-axis micrometer is mounted on the fixed base; the X-axis micrometer is mounted on the fixed base; the X-axis bracket is mounted on the X-axis micrometer; the fixed shaft is mounted on the X-axis bracket and extends in the direction of the Z-axis micrometer, with the extension direction perpendicular to the Z-axis plane of the Z-axis bracket; the Z-axis bracket is mounted on the Z-axis micrometer and has a Z-axis plane perpendicular to the X-axis plane; the Z-axis bracket can move along the Z-axis direction with the Z-axis micrometer, and the fixed shaft can move along the X-axis direction with the X-axis micrometer to move closer to or further away from the Z-axis bracket; the eddy current sensor is mounted on the Z-axis bracket, and the object to be measured is mounted and fixed on the fixed shaft; wherein, the X-axis plane is a horizontal plane and is the plane containing the X-axis; the Z-axis plane is perpendicular to the X-axis plane and is the plane containing the Z-axis.

[0006] According to one embodiment of the eddy current sensor test platform for magnetic levitation motors of this utility model, the x-axis micrometer is horizontally mounted on the sliding base via the x-axis slide rail and can move along the x-axis along the slide rail. The sliding base has a locking mechanism to lock the x-axis micrometer. The sliding base is mounted on the fixed base.

[0007] According to one embodiment of the eddy current sensor test platform for magnetic levitation motors of this utility model, the z-axis micrometer is vertically fixed to the base by fixing bolts.

[0008] According to one embodiment of the eddy current sensor test platform for magnetic levitation motors of this utility model, the fixed shaft is fixedly installed on the x-axis bracket by fixing bolts, the fixed shaft extends in the direction of the z-axis micrometer and faces the z-axis bracket, and the object to be tested is fixedly installed on the fixed shaft.

[0009] According to one embodiment of the eddy current sensor test platform for magnetic levitation motors of this utility model, the x-axis bracket is vertically fixed on the x-axis micrometer.

[0010] According to one embodiment of the eddy current sensor test platform for magnetic levitation motors of this utility model, the eddy current sensor is mounted on an x-axis bracket via a fixed platform, the object to be tested is fixedly mounted on a fixed axis, and the cylindrical surface of the object to be tested is directly opposite the eddy current sensor, thereby realizing the displacement detection of the eddy current on the cylindrical surface, and thus obtaining the detection characteristic curve of the eddy current sensor.

[0011] The present invention provides a test platform for eddy current sensors for magnetic levitation motors, taking into account the actual working conditions of eddy current sensors to provide a test platform, thereby improving the detection accuracy. Attached Figure Description

[0012] Figure 1 The figure shown is an overall structural diagram of the test platform for the eddy current sensor of the magnetic levitation motor of this utility model.

[0013] Figure 2 The image shown is a side view of the test platform for the eddy current sensor used in the magnetic levitation motor of this utility model.

[0014] Figure 3 The figure shown is a cross-sectional view of the test platform for the eddy current sensor of the magnetic levitation motor of this utility model.

[0015] Figure 4 The figure shown is a cross-sectional view of the cylindrical surface of the test platform for the eddy current sensor of the magnetic levitation motor of this utility model. Detailed Implementation

[0016] To make the objectives, contents, and advantages of this utility model clearer, the specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples.

[0017] Figure 1 The diagram shown is an overall structural diagram of the test platform for the eddy current sensor of the magnetic levitation motor of this utility model. Figure 2 The image shown is a side view of the test platform for the eddy current sensor used in the magnetic levitation motor of this utility model. Figure 1 as well as Figure 2 As shown, the present invention provides a test platform for an eddy current sensor for a magnetic levitation motor, comprising a fixed base 10, a z-axis micrometer 3, an x-axis micrometer 9, a base 1, an x-axis bracket 13, a z-axis bracket 8, a fixed shaft 15, and a fixing bolt 17.

[0018] like Figure 1 as well as Figure 2 As shown, the z-axis micrometer 3 is vertically fixed to the base 10 by fixing bolts 17. The x-axis micrometer 9 is horizontally fixed to the base 1. The base 1 is mounted on the fixed base 10. The fixed shaft 15 is fixed to the x-axis bracket 13 by fixing bolts, extending towards the z-axis micrometer 3 and facing the z-axis bracket 8. The x-axis bracket 13 is vertically fixed to the x-axis micrometer 9. The z-axis bracket 8 is fixedly mounted to the z-axis micrometer 3.

[0019] like Figure 1 as well as Figure 2 As shown, the z-axis support 8 can move along the z-axis direction with the z-axis micrometer 3. The fixed shaft 15 can move along the x-axis direction with the x-axis micrometer 9. The z-axis direction is perpendicular to the plane of the fixed base 10, and the x-axis direction is perpendicular to the z-axis direction, so that the fixed shaft 15 moves closer to or further away from the z-axis support 8 along the x-axis direction. The eddy current sensor can be mounted on the z-axis support 8, and the object being measured is mounted and fixed on the fixed shaft 15.

[0020] Figure 3 The figure shown is a cross-sectional view of the test platform for the eddy current sensor of the magnetic levitation motor of this utility model. Figure 3 As shown, with the increasing demand for high power density in magnetic levitation motors, the eddy current sensor 2 and the magnetic bearing 4 are integrated into a magnetic bearing assembly. To avoid electromagnetic interference, the magnetic bearing assembly is mounted on the z-axis bracket 8. By changing the current in the magnetic bearing 4, different magnetic fields are generated, thereby changing the magnetic field of the thrust disk 5. This allows the anti-interference capability of the eddy current sensor to be detected.

[0021] By adjusting the distance between the eddy current sensor and the object being measured, the displacement voltage response curves of the eddy current sensor at different distances can be tested.

[0022] The working principle of this embodiment is as follows: the eddy current sensor can be installed in the z-axis bracket 8, and the z-axis bracket 8 can move along the z-direction with the z-axis micrometer 3. The object to be measured is mounted and fixed on the fixed shaft 15, and the fixed shaft 15 can move along the x-direction with the x-axis micrometer 9. This allows adjustment of the distance between the eddy current sensor and the object to be measured, thereby testing the displacement voltage response curve of the eddy current sensor at different distances.

[0023] Figure 4 The figure shown is a cross-sectional view of the cylindrical surface of the test platform for the eddy current sensor of the magnetic levitation motor of this utility model. Figure 4As shown, the application scenarios of eddy current sensors are mostly non-planar, but rather cylindrical. To improve the detection accuracy of the eddy current sensor, the fixed stage 6 is fixed in the middle of the z-axis support 8, and the eddy current sensor is then installed and fixed in the fixed stage 6. The object to be tested 5 is fixedly installed on the fixed shaft 15, with the cylindrical surface of the object to be tested facing the eddy current sensor. This achieves the displacement detection of the eddy current on the cylindrical surface, thereby obtaining the detection characteristic curve of the eddy current sensor.

[0024] This invention mounts and fixes an eddy current sensor in a fixed platform, with the object to be tested fixedly mounted on a fixed shaft, its cylindrical surface directly opposite the eddy current sensor. A magnetic bearing assembly is mounted and fixed in a base. By changing the current in the magnetic bearing, different magnetic fields are generated, thereby altering the magnetic field of the thrust disk and testing the anti-interference capability of the eddy current sensor.

[0025] The advantages of this utility model are: (1) it can provide a compatible platform for high power density magnetic levitation bearing components to realize the detection of electromagnetic interference problems; (2) it can provide a test platform according to the actual application of eddy current sensors to improve the detection accuracy.

[0026] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A test platform for eddy current sensors used in magnetic levitation motors, characterized in that, include: Fixed base, Z-axis micrometer, X-axis micrometer, base, X-axis bracket, Z-axis bracket, fixed axis, and fixing bolts; The z-axis micrometer is mounted on a fixed base; the x-axis micrometer is mounted on a fixed base; the x-axis bracket is mounted on the x-axis micrometer; the fixed axis is mounted on the x-axis bracket, and the fixed axis extends in the direction of the z-axis micrometer, with the extension direction perpendicular to the z-axis surface of the z-axis bracket; the z-axis bracket is mounted on the z-axis micrometer and has a z-axis surface perpendicular to the x-axis surface. The z-axis support can move along the z-axis direction with the z-axis micrometer, and the fixed axis can move along the x-axis direction with the x-axis micrometer to move closer to or further away from the z-axis support; the eddy current sensor is mounted on the z-axis support, and the object being measured is mounted and fixed on the fixed axis. The x-axis plane is a horizontal plane and is the plane containing the x-axis; the z-axis plane is perpendicular to the x-axis plane and is the plane containing the z-axis.

2. The test platform for eddy current sensors for magnetic levitation motors as described in claim 1, characterized in that, The x-axis micrometer is mounted horizontally on a sliding base via an x-axis slide rail and can move along the x-axis. The sliding base has a locking mechanism to lock the x-axis micrometer. The sliding base is mounted on a fixed base.

3. The test platform for eddy current sensors for magnetic levitation motors as described in claim 1, characterized in that, The z-axis micrometer is vertically fixed to the base using fixing bolts.

4. The test platform for eddy current sensors for magnetic levitation motors as described in claim 1, characterized in that, The fixed shaft is fixedly mounted on the x-axis bracket by fixing bolts. The fixed shaft extends in the direction of the z-axis micrometer and faces the z-axis bracket. The object to be inspected is fixedly mounted on the fixed shaft.

5. The test platform for eddy current sensors for magnetic levitation motors as described in claim 1, characterized in that, The x-axis bracket is vertically fixed on the x-axis micrometer.

6. The test platform for eddy current sensors for magnetic levitation motors as described in claim 1, characterized in that, An eddy current sensor is mounted on an x-axis bracket via a fixed platform. The object to be tested is fixedly mounted on a fixed axis, with the cylindrical surface of the object to be tested facing the eddy current sensor. This enables the detection of the displacement of the cylindrical surface by the eddy current, thereby obtaining the detection characteristic curve of the eddy current sensor.

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