A test device and a test method for testing a magnetic force displacement curve
By employing a frame structure, camera module, measurement module, and carrier module in the magnetic displacement curve testing equipment, precise positioning and force detection of the moving and stationary magnets are achieved, solving the problems of difficult fixation and low positioning accuracy in existing technologies, and realizing high-precision magnetic displacement curve testing.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- INTELLIGENT AUTOMATION ZHUHAI CO LTD
- Filing Date
- 2026-03-31
- Publication Date
- 2026-06-26
AI Technical Summary
Existing magnet magnetic displacement curve testing equipment suffers from problems such as difficulty in fixing and low positioning accuracy, which affect the accuracy of test results.
The system adopts a frame structure, including a camera module, a measurement module, and a carrier module. It utilizes moving components, rotary motors, and pressure sensors to achieve precise positioning and force detection of the moving and stationary magnets. Combined with XYZ three-axis adjustment and grating ruler measurement, it ensures high-precision magnetic displacement curve testing.
It achieves high-precision testing of the magnetic displacement curve of magnets, with a compact structure, simple operation, and high accuracy of test results.
Smart Images
Figure CN122283554A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the technical field of electronic testing equipment, and in particular to a testing device and method for testing magnetic displacement curves. Background Technology
[0002] With the widespread application of electronic devices, the performance stability of magnet wires, as an important functional component in motors, is crucial. During motor production, various performance tests are required on the internal magnets, such as thermal conductivity, resistance, current, and mechanical properties. Currently, no such design invention has been found on the market. Therefore, it is necessary to design a testing device with a reasonable structure, simple operation, and high precision for testing the magnetic force displacement curve of magnets. Existing testing devices have some problems when testing the magnetic force displacement curve of magnets, such as difficulty in fixing the magnet during the test, low displacement accuracy, and low positioning accuracy, affecting the accuracy of the test results. For example, Chinese patent CN212255665U discloses a high-precision electromagnet attraction force testing device. A stepper motor drives a sliding platform to move up and down, which in turn moves a connecting rod, pressure sensor, and measuring rod up and down. When the electromagnet is energized, a reverse force is generated. The pressure sensor and displacement sensor can dynamically measure the change curve between the electromagnet's magnetic force and displacement in real time. However, its positioning accuracy is not high, and the test results are prone to deviation. Therefore, it is necessary to provide a test device and test method for testing magnetic displacement curves, which has the advantages of compact structure, simple operation and high test accuracy. Summary of the Invention
[0003] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a testing device and testing method for testing magnetic displacement curves, which has the advantages of compact structure, simple operation and high testing accuracy.
[0004] The technical solution adopted in this invention is as follows: This invention includes a frame, on which a camera module, a measuring module, and a carrier module are arranged. The measuring module includes a moving component, and a pressure sensor is provided at the moving end of the moving component. The pressure sensor is connected to a mounting plate, and a magnet carrier is provided on the mounting plate. The carrier module includes a rotary motor, and a mounting base is provided on the top of the rotary motor. A fixed magnet is provided on the mounting base. The magnet carrier is located above the mounting base and has a mounting groove. Moving magnets are provided on all four side walls of the mounting groove. The fixed magnet is located inside the mounting groove. The camera module calibrates the position between the moving magnet and the fixed magnet, and the pressure sensor detects the force between the moving magnet and the fixed magnet.
[0005] As can be seen from the above scheme, the operator places the moving magnet into the magnet carrier offline. The moving component drives the magnet carrier to move. The rotary motor acts as an angle motor, which is used to adjust the moving magnet and the fixed magnet to ensure that the moving magnet and the fixed magnet are parallel. Then the test begins. The X-axis linear module of the moving component moves 10 micrometers per step and collects the relationship between displacement and force. It needs to travel a total of 1.1 mm on one side and finally outputs a curve for reference. Obviously, the structure of this application is relatively compact, easy to operate, and can measure the magnetic force displacement curve of the magnet with high precision.
[0006] In a preferred embodiment, the camera module includes a first fixed bracket, on which a first camera is mounted. The first camera is located directly above the magnet carrier, and a lens is connected to the first camera. A front light source is disposed below the lens. The first camera is used to calibrate the relative X-axis and Y-axis positions of the moving magnet and the fixed magnet.
[0007] In a preferred embodiment, the camera module includes a second fixed bracket. Centered on the carrier module, the second fixed bracket and the first fixed bracket are arranged symmetrically front and rear. The second fixed bracket is equipped with a second camera. The lens of the second camera faces the magnet carrier and the mounting base. The second camera is used to calibrate the relative Z-axis position of the moving magnet and the fixed magnet.
[0008] In a preferred embodiment, the first fixed bracket is provided with a backlight source, with the backlight source located on the opposite side of the second camera, centered on the vehicle module.
[0009] In a preferred embodiment, a top block is provided on the adjacent side of the magnet carrier, and the top block is positioned and engaged with the magnet carrier.
[0010] In a preferred embodiment, the top of the mounting base is provided with a cavity that is adapted to the magnet carrier, and pressure plates are provided at both ends of the cavity, which are press-fitted with the magnet carrier.
[0011] In a preferred embodiment, the side wall of the mounting base is provided with a floating pressing component, the cavity is provided with a wire groove, the coil lead of the fixed magnet passes through the wire groove and is connected to the floating pressing component, and the floating pressing component controls the power supply to and from the fixed magnet.
[0012] In a preferred embodiment, the moving component includes an X-axis linear module, an Y-axis linear module is provided at the actuating end of the X-axis linear module, a Z-axis linear module is provided at the actuating end of the Y-axis linear module, and the pressure sensor is provided at the actuating end of the Z-axis linear module.
[0013] A preferred embodiment is that the testing method includes the following steps: Step A: The robotic arm or operator loads the movable magnet into the magnet carrier and fixes the movable magnet in place using the two top blocks; Step B: The moving component drives the mounting plate to move, so that the contact gap between the mounting plate and the mounting base on the Z-axis is 0, and the X-axis position and Y-axis position are adjusted. The positional relationship is observed by the camera module and then inputs a command to the moving component for fine adjustment. Step C: The robot or operator places the magnet carrier into the cavity, positions it with pins, and secures it with screws. Step D: The moving component drives the mounting plate so that the moving magnet is away from the mounting base without interference; Step E: The robotic arm places the fixed magnet into the cavity, and then uses the pressure plate to fix the fixed magnet securely. The magnet is positioned by its shape and secured with screws. Then, the coil lead of the fixed magnet passes through the wire groove and through the two floating pressing components to energize / de-energize the fixed magnet. Step F: The moving component drives the mounting plate to adjust the moving magnet and the fixed magnet to the corresponding test positions, with a single-sided distance of 1.1mm on the X-axis, 0.255mm on the Y-axis, and 0.125mm on the Z-axis. This process relies on the coordination between the camera module and the moving component for adjustment. Step G: After the test position is adjusted, the moving component is driven to run. The force is tested once for each step, with each step being 1 micrometer. The displacement is measured by the grating ruler of the moving component, and the force is measured by the pressure sensor. The component moves step by step until it has moved 1.1 mm on one side, and then the other side is measured. After the data is collected, the computer will draw a curve to determine whether the design of the two magnets is reasonable and reliable. Attached Figure Description
[0014] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a three-dimensional structural diagram of the camera module, the measurement module, and the vehicle module; Figure 3 This is a three-dimensional structural diagram of the first camera; Figure 4 This is a three-dimensional structural diagram of the measurement module and the vehicle module; Figure 5 This is a three-dimensional structural diagram of the vehicle module; Figure 6 This is an enlarged view of part A of the vehicle module; Figure 7 This is a schematic diagram of the working principle of the present invention; Figure 8 This is the test curve diagram of the present invention. Detailed Implementation
[0015] like Figures 1 to 6 As shown, in this embodiment, the present invention includes a frame 1, which is equipped with a camera module 2, a measurement module 3, and a carrier module 4. The measurement module 3 includes a moving component 5, and a pressure sensor 6 is provided at the moving end of the moving component 5. The pressure sensor 6 is connected to a mounting plate 25, and a magnet carrier 7 is provided on the mounting plate 25. The carrier module 4 includes a rotary motor 8, and a mounting base 9 is provided on the top of the rotary motor 8. A fixed magnet 10 is provided on the mounting base 9. The magnet carrier 7 is located above the mounting base 9 and has a mounting groove 11. A movable magnet 12 is provided on each of the four side walls of the mounting groove 11. The fixed magnet 10 is located inside the mounting groove 11. The camera module 2 calibrates the position between the movable magnet 12 and the fixed magnet 10, and the pressure sensor 6 detects the force between the movable magnet 12 and the fixed magnet 10.
[0016] The cavity of the magnet carrier 7 is made of wear-resistant aluminum. The mounting base 9 is used to fix the fixed magnet. After the magnet is placed into the corresponding cavity, a fixing plate is installed from directly above to firmly fix it. Both magnets must be fixed using a rigid connection to prevent misalignment caused by vibration or external force during the test, which would lead to inaccurate test values. The two fixing methods are shown later. The rotary motor 8 is a piezoelectric motor that uses ceramic creep to achieve angular deflection control with a precision of nanometer level. Its function is to calibrate the relative position between the moving magnet 12 and the fixed magnet 10. During the test, the moving magnet 12 and the fixed magnet 10 must not have corresponding angles and must be relatively parallel. The pressure sensor 6 is used to collect real-time changes in force during the test; the moving component 5 can achieve XYZ three-axis adjustment with an accuracy of nanometer level. Its function is to calibrate the XYZ relative position between the moving magnet 12 and the fixed magnet 10. At the same time, during the test, the X-axis motor of the moving component 5 runs on the X-axis to scan and adjust the X distance between the moving magnet 12 and the fixed magnet 10 to collect changes in force. The motor has a grating ruler inside, which can be used to collect the displacement of the magnet with an accuracy of nanometer level. like Figure 3As shown, in this embodiment, the camera module 2 includes a first fixed bracket 13, on which a first camera 14 is mounted. The first camera 14 is located directly above the magnet carrier 7. The first camera 14 is connected to a lens 15, and a front light source 16 is positioned below the lens 15. The first camera 14 is used to calibrate the relative X-axis and Y-axis positions of the moving magnet 12 and the fixed magnet 10. The first camera 14 calibrates the relative XY-axis positions of the moving magnet 12 and the fixed magnet 10, and has a resolution of 64 megapixels, achieving a repeatability accuracy at the micrometer level. The lens 15 is used in conjunction with the first camera 14 to calibrate the positional relationship between the moving magnet 12 and the fixed magnet 10. The front light source 16 illuminates the moving magnet 12 and the fixed magnet 10 to facilitate camera point capture.
[0017] like Figure 2 As shown, in this embodiment, the camera module 2 includes a second fixed bracket 17. Centered on the carrier module 4, the second fixed bracket 17 and the first fixed bracket 13 are symmetrically arranged front and rear. The second fixed bracket 17 is equipped with a second camera 18, the lens of which faces the magnet carrier 7 and the mounting base 9. The second camera 18 is used to calibrate the relative Z-axis position of the moving magnet 12 and the fixed magnet 10. The second camera 18, used for calibrating the relative Z-axis position of the moving magnet 12 and the fixed magnet 10, has 64 megapixels and a photo repetition accuracy down to the micrometer level. The second fixed bracket 17 is used to fix the second camera 18 and is flexibly adjustable.
[0018] like Figure 3 As shown, in this embodiment, the first fixed bracket 13 is equipped with a backlight 19, which is located on the opposite side of the second camera 18 with the carrier module 4 as the center. The backlight 19 is used to illuminate the moving magnet 12 and the fixed magnet 10, facilitating the camera's capture point to achieve Z-direction calibration.
[0019] like Figure 5 As shown, in this embodiment, a top block 20 is provided on the adjacent side of the magnet carrier 7, and the top block 20 is positioned and engaged with the magnet carrier 7. The top block 20 can firmly fix the movable magnet 12 in the cavity 21.
[0020] like Figure 5 As shown, in this embodiment, the top of the mounting base 9 is provided with a cavity 21, which is adapted to the magnet carrier 7. Pressure plates 22 are provided at both ends of the cavity 21, and the pressure plates 22 are pressed and engaged with the magnet carrier 7.
[0021] like Figure 5 As shown, in this embodiment, a floating pressing component 23 is provided on the side wall of the mounting base 9, and a wire groove 24 is provided in the cavity 21. The coil lead of the fixed magnet 10 passes through the wire groove 24 and connects to the floating pressing component 23. The floating pressing component 23 controls the power supply to and from the fixed magnet 10. The floating pressing component 23 serves as a height-equal screw pressing module. It has two springs that float the upper pressure plate. The operator will pass the copper wire (with a wire diameter of less than 0.1mm) of the fixed magnet 10 through the gap with a tool and then tighten it by hand. The force is controllable in this process. The entire upper and lower pressure plates are made of brass and can be used for continuity testing. There is a hole at the tail of the lower pressure plate that can be used to fix a terminal to power the coil of the fixed magnet 10. The current and voltage are controlled by the SMU to change the coil current and thus adjust the magnetic field size / direction, meeting various testing requirements.
[0022] like Figure 4 As shown, in this embodiment, the moving component 5 includes an X-axis linear module, the moving end of the X-axis linear module is provided with a Y-axis linear module, the moving end of the Y-axis linear module is provided with a Z-axis linear module, and the pressure sensor 6 is provided at the moving end of the Z-axis linear module.
[0023] In this embodiment, the rack 1 is also equipped with a computer display screen, which is used to display test data and page operations.
[0024] like Figures 1 to 8 As shown, in this embodiment, the testing method includes the following steps: Step A: The robot or operator loads the movable magnet 12 into the magnet carrier 7 and fixes the movable magnet 12 with the two top blocks 20; Step B: The moving component 5 drives the mounting plate 25 to move, so that the contact gap between the mounting plate 25 and the mounting base 9 on the Z axis is 0, and the X-axis position and Y-axis position are adjusted. The positional relationship is observed by the camera module 2 and then inputs a command to the moving component 5 for fine adjustment. Step C: The robot or operator places the magnet carrier 7 into the cavity 21, positions it with pins, and fixes it with screws. Step D: The moving component 5 drives the mounting plate 25 so that the moving magnet 12 is away from the mounting base 9 without interference; Step E: The robotic arm places the fixed magnet 10 into the cavity 21, and then uses the pressure plate 22 to fix the fixed magnet 10 securely. The magnet is positioned by its shape and fixed with screws. Then, the coil lead of the fixed magnet 10 passes through the wire groove 24 and through the two floating pressing components 23 to energize / de-energize the fixed magnet 10. Step F: The moving component 5 drives the mounting plate 25 to adjust the moving magnet 12 and the fixed magnet 10 to the corresponding test positions, with a single-sided distance of 1.1mm on the X-axis, 0.255mm on the Y-axis, and 0.125mm on the Z-axis. This process relies on the coordination and adjustment between the camera module 2 and the moving component 5. Step G: After the test position is adjusted, the moving component 5 is driven to run. The force is tested once for each step, with each step being 1 micrometer. The displacement is measured by the grating ruler of the moving component 5, and the force is measured by the pressure sensor 6. The moving component moves step by step until it has moved 1.1 mm on one side, and then the other side is measured. After collecting the data, the computer will draw a curve to determine whether the design of the two magnets is reasonable and reliable. This process can save a lot of R&D costs before designing a linear motor, because the linear motor relies on these two magnets to vibrate.
[0025] Although the embodiments of the present invention are described with reference to actual solutions, they do not constitute a limitation on the meaning of the present invention. Modifications to the embodiments and combinations with other solutions based on this specification will be obvious to those skilled in the art.
Claims
1. A testing device for testing magnetic displacement curves, comprising a frame (1), wherein the frame (1) is provided with a camera module (2), a measurement module (3), and a carrier module (4), characterized in that: The measurement module (3) includes a moving component (5), the moving end of which is provided with a pressure sensor (6), the pressure sensor (6) is connected to a mounting plate (25), the mounting plate (25) is provided with a magnet carrier (7), the carrier module (4) includes a rotary motor (8), the top of the rotary motor (8) is provided with a mounting base (9), the mounting base (9) is provided with a fixed magnet (10), the magnet carrier (7) is located above the mounting base (9), the magnet carrier (7) has a mounting groove (11), the four side walls of the mounting groove (11) are provided with moving magnets (12), the fixed magnet (10) is located inside the mounting groove (11), the camera module (2) calibrates the position between the moving magnet (12) and the fixed magnet (10), and the pressure sensor (6) detects the force between the moving magnet (12) and the fixed magnet (10).
2. The testing equipment for testing magnetic displacement curves according to claim 1, characterized in that, The camera module (2) includes a first fixed bracket (13), on which a first camera (14) is mounted. The first camera (14) is located directly above the magnet carrier (7). The first camera (14) is connected to a lens (15), and a front light source (16) is provided below the lens (15). The first camera (14) is used to calibrate the relative X-axis and Y-axis positions of the moving magnet (12) and the fixed magnet (10).
3. The testing equipment for testing magnetic displacement curves according to claim 2, characterized in that, The camera module (2) includes a second fixed bracket (17). Centered on the vehicle module (4), the second fixed bracket (17) and the first fixed bracket (13) are arranged symmetrically front and back. The second fixed bracket (17) is provided with a second camera (18). The lens of the second camera (18) faces the magnet carrier (7) and the mounting base (9). The second camera (18) is used to calibrate the relative Z-axis position of the moving magnet (12) and the fixed magnet (10).
4. The testing device for testing magnetic displacement curves according to claim 3, characterized in that, The first fixed bracket (13) is provided with a backlight (19), which is located on the opposite side of the second camera (18) with the vehicle module (4) as the center.
5. The testing device for testing magnetic displacement curves according to claim 4, characterized in that, A top block (20) is provided on the adjacent side of the magnet carrier (7), and the top block (20) is positioned and engaged with the magnet carrier (7).
6. The testing device for testing magnetic displacement curves according to claim 5, characterized in that, The top of the mounting base (9) is provided with a cavity (21), which is adapted to the magnet carrier (7). Pressure plates (22) are provided at both ends of the cavity (21), and the pressure plates (22) are pressed together with the magnet carrier (7).
7. The testing device for testing magnetic displacement curves according to claim 6, characterized in that, The mounting base (9) is provided with a floating pressure component (23) on its side wall. The cavity (21) is provided with a wire groove (24). The coil lead of the fixed magnet (10) passes through the wire groove (24) and is connected to the floating pressure component (23). The floating pressure component (23) switches the power on and off of the fixed magnet (10).
8. The testing device for testing magnetic displacement curves according to claim 1, characterized in that, The moving component (5) includes an X-axis linear module, the moving end of which is provided with a Y-axis linear module, the moving end of which is provided with a Z-axis linear module, and the pressure sensor (6) is located at the moving end of the Z-axis linear module.
9. A testing method comprising the testing apparatus for testing magnetic displacement curves as described in claim 7, characterized in that, The testing method includes the following steps: Step A: The robot or operator loads the movable magnet (12) into the magnet carrier (7) and fixes the movable magnet (12) with the two top blocks (20); Step B: The moving component (5) drives the mounting plate (25) to move, so that the contact Z-axis gap between the mounting plate (25) and the mounting base (9) is 0, and the X-axis position and Y-axis position are adjusted. The positional relationship is observed by the camera module (2) and then inputs the command to the moving component (5) for fine adjustment. Step C: The robot or operator places the magnet carrier (7) into the cavity (21), positions it with pins, and fixes it with screws; Step D: The moving component (5) drives the mounting plate (25) so that the moving magnet (12) moves away from the mounting base (9) without interference; Step E: The robotic arm places the fixed magnet (10) into the cavity (21), and then uses the pressure plate (22) to fix the fixed magnet (10) securely. The magnet is positioned by its shape and fixed with screws. Then, the coil lead of the fixed magnet (10) passes through the wire groove (24) and through the two floating pressing components (23) to energize / de-energize the fixed magnet (10). Step F: The moving component (5) drives the mounting plate (25) to adjust the moving magnet (12) and the fixed magnet (10) to the corresponding test positions. The distance on one side of the X-axis is 1.1mm, the distance on one side of the Y-axis is 0.255mm, and the distance on the Z-axis is 0.125mm. This process relies on the coordination between the camera module (2) and the moving component (5). Step G: After the test position is adjusted, the moving component (5) is driven to run. The force is tested once for each step. Each step is 1 micrometer. The displacement is measured by the grating ruler of the moving component (5), and the force is measured by the pressure sensor (6). The component moves step by step until it has covered 1.1 mm on one side. Then the other side is measured. After collecting the data, the computer will draw a curve to determine whether the design of the two magnets is reasonable and reliable.