Universal jig for testing and correcting inductance encoder

Abstract

The utility model discloses a universal jig for testing and correcting an inductance encoder, the inductance encoder comprises an inductance encoder stator plate and an inductance encoder rotor plate, the jig comprises a bottom plate, a rotating motor, a rotor fixing tray, a stator fixing tray and an X-axis, Y-axis and Z-axis alignment platform, the bottom of the rotating motor is fixedly mounted at one end of the bottom plate, and the bottom of the rotating motor is fixedly mounted at the other end of the bottom plate; the top of the rotating motor is fixedly connected with the bottom of the rotor fixing tray, the bottom of the XYZ-axis alignment platform is fixedly installed at the other end of the bottom plate, and the top of the XYZ-axis alignment platform is fixedly connected with the bottom of one end of the stator fixing tray in a sliding mode. The device can adapt to inductance encoders of different sizes and specifications, the number of tools is reduced, and the test cost is reduced. By replacing the rotor fixing tray and the stator fixing tray with different radiuses, the test requirements of inductance encoders with different sizes can be met, and the universality is provided.

Description

Technical Field

[0001] This application belongs to the field of fixtures, and in particular relates to a general-purpose fixture for testing and calibrating inductive encoders. Background Technology

[0002] Inductive encoders, as precision position sensors, play a crucial role in industrial automation, robotics, aerospace, and other fields. Their performance directly affects the accuracy, stability, and reliability of equipment. Therefore, inductive encoders require rigorous testing and calibration before being put into use to ensure their performance meets requirements. The testing and calibration of inductive encoders necessitates precise control of gap and concentricity. The output signal of an inductive encoder is closely related to the gap and concentricity between the stator and rotor plates, thus requiring precise control of their relative positional relationship.

[0003] Existing methods for testing and calibrating inductive encoders use customized fixtures and rotary motor testing. These customized fixtures are designed with grooves for specific encoder models, fixing the rotor plate to the rotary motor and placing the stator plate in the groove. The gap is controlled by adjusting the groove depth. However, this method lacks versatility, cannot adapt to different encoder models, requires custom-made fixtures, increasing cost and inventory pressure. Furthermore, the adjustment precision is limited, failing to accurately control gap and concentricity, affecting the accuracy of test results. The operation is complex, involving manual pressing and rotation testing, resulting in low efficiency and the potential for introducing errors.

[0004] Rotary motor testing involves mounting an inductive encoder on the rotary motor and obtaining test data by adjusting the motor speed and encoder parameters. This method is cumbersome to assemble, requiring multiple steps to install the inductive encoder on the rotary motor, resulting in low efficiency, a high risk of errors, low test accuracy, and the inability to adjust the gap and concentricity according to test requirements.

[0005] In summary, existing technologies suffer from poor versatility, low adjustment accuracy, and complex operation, failing to meet diverse testing needs. There is an urgent need for a universal fixture for testing and calibrating inductive encoders. Summary of the Invention

[0006] The purpose of this application is to provide a universal fixture for testing and calibrating inductive encoders.

[0007] A universal fixture that can adapt to inductive encoders of different sizes and specifications, reducing the number of fixtures, lowering costs, and meeting diverse testing needs.

[0008] To achieve the above objectives, this application provides a universal fixture for testing and calibrating inductive encoders. The inductive encoder includes an inductive encoder stator plate and an inductive encoder rotor plate. The fixture includes a base plate, a rotary motor, a rotor fixing tray, a stator fixing tray, and an XYZ axis alignment platform. The bottom of the rotary motor is fixedly mounted on one end of the base plate, and the top of the rotary motor is fixedly connected to the bottom of the rotor fixing tray. The bottom of the XYZ axis alignment platform is fixedly mounted on the other end of the base plate, and the top of the XYZ axis alignment platform is fixedly slidably connected to the bottom of one end of the stator fixing tray. A first through hole is opened at the other end of the stator fixing tray. The rotor fixing tray is provided with a through pipe, and a rotor fixing flange is fixedly mounted on the top of the through pipe of the rotor fixing tray. An inductive encoder rotor plate is bonded to the top of the rotor fixing flange. The through pipe is coaxial with the first through hole at the other end of the stator fixing tray. There is a certain gap between the rotor fixing tray and the stator fixing tray, but they are not connected. The stator fixing flange is fixedly installed on the top of the first through hole of the stator fixing tray, and the inductive encoder stator plate is fixedly installed on the top of the stator fixing flange. The stator fixing tray, supported by the XYZ axis alignment platform, is parallel to the base plate. When the fixture is working, the rotary motor drives the rotor fixing tray and the inductive encoder rotor plate on the rotor fixing flange to rotate. The XYZ axis alignment platform adjusts the position of the inductive encoder stator plate on the stator fixing tray and the stator fixing flange in the X, Y, and Z axis directions to achieve precise alignment between the inductive encoder stator plate and the inductive encoder rotor plate.

[0009] Preferably, the structure of the XYZ axis alignment platform is as follows: it includes an X-axis displacement adjustment module mounted on a base plate, a Y-axis displacement adjustment module mounted on the upper end of the X-axis displacement adjustment module, and a Z-axis height adjustment module mounted on the Y-axis displacement adjustment module. The upper end of the Z-axis height adjustment module is slidably connected to the stator fixing tray. The Z-axis height adjustment module of the XYZ axis alignment platform includes a Z-axis slide and a Z-axis slide rail. The top of the Z-axis slide rail is provided with a Z-axis slide, which slides on the Z-axis slide rail. The top of the Z-axis slide is connected to the bottom of one end of the stator fixing tray by screws. The X-axis displacement adjustment module, the Y-axis displacement adjustment module, and the Z-axis height adjustment module all adopt a high-precision screw and nut transmission structure.

[0010] Preferably, the rotor fixing tray has a second bottom screw hole at the bottom, and the rotating motor has a first top screw hole at the top corresponding to the second bottom screw hole at the bottom of the rotor fixing tray. The second bottom screw hole and the first top screw hole are fixedly connected by screws.

[0011] Preferably, the bottom of the rotary motor and the XYZ axis alignment platform is provided with a first bottom screw hole, and the base plate is provided with a base plate screw hole corresponding to the first bottom screw hole. The first bottom screw hole at the bottom of the rotary motor and the XYZ axis alignment platform and the base plate screw hole are fixedly connected by screws.

[0012] Preferably, the inductive encoder rotor plate is fixed above the rotor mounting flange by adhesive.

[0013] Preferably, the through pipe of the rotor fixing tray is adapted to the rotor fixing flange, the rotor fixing flange is adapted to the rotor plate of the inductive encoder, and the stator fixing flange is adapted to the stator plate of the inductive encoder.

[0014] Preferably, the rotor fixing flange is fixedly connected to the rotor fixing tray by screws, the stator fixing flange is fixedly connected to the stator fixing tray by screws, and the inductive encoder stator plate is fixedly connected to the stator fixing flange by screws.

[0015] Preferably, the rotary motor is a servo motor.

[0016] Preferably, the rotor mounting tray is coaxially mounted with the rotary motor.

[0017] Preferably, the axis of the rotary motor is perpendicular to the plane of the base plate.

[0018] The universal fixture for testing and calibrating inductive encoders provided in this application has the following advantages compared with the prior art:

[0019] (1) A universal fixture for testing and calibrating inductive encoders is modularly designed to be adaptable to inductive encoders of different sizes and specifications, reducing the number of fixtures and lowering testing costs. By replacing rotor mounting trays and stator mounting trays of different radii, it can meet the testing needs of inductive encoders of different sizes, providing versatility.

[0020] (2) A general-purpose fixture for testing and calibrating inductive encoders adopts a high-precision screw and nut transmission structure for the XYZ axis alignment platform, which can accurately control the gap and concentricity between the inductive encoder stator plate and the inductive encoder rotor plate, ensuring the accuracy of test results and improving adjustment accuracy.

[0021] (3) A general-purpose fixture for testing and calibrating inductive encoders simplifies the assembly and adjustment steps of the fixture, reduces cumbersome installation operations, improves testing efficiency, reduces human error, and simplifies operation.

[0022] (4) A general-purpose fixture for testing and calibrating inductive encoders can adjust the gap and concentricity according to the test requirements, meet diverse test requirements, ensure the performance evaluation of inductive encoders under different working conditions, and has good flexibility. Attached Figure Description

[0023] Figure 1 A schematic diagram of the structure of a general-purpose fixture for testing and calibrating inductive encoders according to an embodiment of this application is shown;

[0024] Figure 2 A schematic diagram of the structure of the XYZ axis alignment platform according to an embodiment of this application is shown;

[0025] Figure 3 A schematic diagram of the stator fixing tray according to an embodiment of this application is shown;

[0026] Figure 4 A schematic diagram of the rotor fixing tray structure according to an embodiment of this application is shown;

[0027] Figure 5 A schematic diagram of the structure of the rotary motor according to an embodiment of this application is shown;

[0028] Figure 6 A schematic diagram of the structure of the base plate according to an embodiment of this application is shown.

[0029] In the figure: base plate 1, base plate screw hole 111, rotary motor 2, rotor fixing tray 3, through pipe 301, first top screw hole 302, stator fixing flange 4, rotor fixing flange 5, stator fixing tray 6, first through hole 601, XYZ axis alignment platform 7, Y-axis displacement adjustment module 8, X-axis displacement adjustment module 9, Z-axis height adjustment module 10, Z-axis slide table 101, Z-axis slide rail 102, inductive encoder rotor plate 11, inductive encoder stator plate 12. Detailed Implementation

[0030] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, it should be noted that, for ease of description, only the parts relevant to this application are shown in the accompanying drawings, not the entire structure. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this application.

[0031] The terms “comprising” and “having”, and any variations thereof, used in this application are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the steps or units listed, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to such process, method, product, or apparatus.

[0032] In this application, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments.

[0033] like Figure 1-6 As shown in the embodiment of this application, a general-purpose fixture for testing and calibrating inductive encoders is provided. The inductive encoder includes an inductive encoder stator plate 12 and an inductive encoder rotor plate 11. The fixture includes a base plate 1, a rotary motor 2, a rotor fixing tray 3, a stator fixing tray 6, and an XYZ axis alignment platform 7. The bottom of the rotary motor 2 is fixedly mounted on one end of the base plate 1, and the top of the rotary motor 2 is fixedly connected to the bottom of the rotor fixing tray 3. The bottom of the XYZ axis alignment platform 7 is fixedly mounted on the other end of the base plate 1, and the top of the XYZ axis alignment platform 7 is fixedly slidably connected to the bottom of one end of the stator fixing tray 6. A first through hole 601 is opened at the other end of the stator fixing tray 6. The rotor fixing tray 3 is provided with a through pipe 301, and a rotor fixing flange 5 is fixedly mounted on the top of the through pipe 301 of the rotor fixing tray 3. The top of the rotor plate 11 of the inductive encoder is bonded together. The through pipe 301 is coaxial with the first through hole 601 at the other end of the stator fixing tray 6. There is a certain gap between the rotor fixing tray 3 and the stator fixing tray 6 and there is no connection. The top of the first through hole 601 of the stator fixing tray 6 is fixedly installed with the stator fixing flange 4. The top of the stator fixing flange 4 is fixedly installed with the inductive encoder stator plate 12. The stator fixing tray 6, supported by the XYZ axis alignment platform 7, is parallel to the base plate 1. When the fixture is working, the rotary motor 2 drives the rotor plate 11 of the inductive encoder on the rotor fixing tray 3 and the rotor fixing flange 5 to rotate. The XYZ axis alignment platform 7 adjusts the position of the inductive encoder stator plate 12 on the stator fixing tray 6 and the stator fixing flange 4 in the X, Y, and Z axis directions to make the inductive encoder stator plate 12 and the inductive encoder rotor plate 11 precisely aligned.

[0034] The base plate serves as the basic support structure for the entire fixture, used to fix the rotary motor and the alignment platform; the base is made of metal and has good rigidity and stability to ensure the accuracy and stability of the test.

[0035] The rotor mounting flange is used to fix the rotor plate of the inductive encoder, and the stator mounting flange is used to fix the stator plate of the inductive encoder.

[0036] A rotary motor is used to drive the rotor to rotate on a fixed tray, simulating rotational conditions in real-world applications. The rotary motor can be a servo motor to achieve precise speed and position control.

[0037] The shape and size of the rotor mounting tray are designed according to the model of the inductive encoder.

[0038] The shape and size of the stator mounting tray are designed according to the model of the inductive encoder.

[0039] The rotor mounting tray rotates with the rotary motor. When the fixture is working, the rotary motor 2 drives the rotor mounting tray 3 and the inductive encoder rotor plate 14 on the rotor mounting flange 5 to rotate. The XYZ axis alignment platform 7 adjusts the position of the inductive encoder stator plate 15 on the stator mounting tray 6 and the stator mounting flange 4 in the X, Y, and Z axis directions to achieve precise alignment between the inductive encoder stator plate 15 and the rotor plate 14 for testing and calibration.

[0040] Example 2

[0041] like Figure 2 As shown, preferably, the structure of the XYZ axis alignment platform 7 is as follows: it includes an X-axis displacement adjustment module 9 mounted on the base plate 1, a Y-axis displacement adjustment module 8 mounted on the upper end of the X-axis displacement adjustment module 9, and a Z-axis height adjustment module 10 mounted on the Y-axis displacement adjustment module 8. The upper end of the Z-axis height adjustment module 10 is slidably connected to the stator fixing tray 6. The Z-axis height adjustment module 10 of the XYZ axis alignment platform 7 includes a Z-axis slide 101 and a Z-axis slide rail 102. The top of the Z-axis slide rail 102 is provided with the Z-axis slide 101, which slides on the Z-axis slide rail 102. The top of the Z-axis slide 101 is connected to the bottom of one end of the stator fixing tray 6 by screws. The X-axis displacement adjustment module 9, the Y-axis displacement adjustment module 8, and the Z-axis height adjustment module 10 all adopt a high-precision screw and nut transmission structure.

[0042] Preferably, the rotor fixing tray 3 has a second bottom screw hole at its bottom, and the rotary motor 2 has a first top screw hole 302 at its top that corresponds to the second bottom screw hole at the bottom of the rotor fixing tray 3. The second bottom screw hole and the first top screw hole 302 are fixedly connected by screws.

[0043] like Figure 2 , 5 As shown in Figure 6, preferably, the bottom of the rotary motor 2 and the XYZ axis alignment platform 7 is provided with a first bottom screw hole, and the base plate 1 is provided with a base plate screw hole 111 corresponding to the first bottom screw hole. The first bottom screw hole at the bottom of the rotary motor 2 and the XYZ axis alignment platform 7 is fixedly connected to the base plate screw hole 111 by screws.

[0044] Preferably, the inductive encoder rotor plate 11 is fixed above the rotor fixing flange by adhesive.

[0045] Preferably, the through pipe 301 of the rotor fixing tray 3 is adapted to the rotor fixing flange 5, the rotor fixing flange 5 is adapted to the inductive encoder rotor plate 11, and the stator fixing flange 4 is adapted to the inductive encoder stator plate 12.

[0046] Preferably, the rotor fixing flange 5 is fixedly connected to the rotor fixing tray 3 by screws, the stator fixing flange 4 is fixedly connected to the stator fixing tray 6 by screws, and the inductor encoder stator plate 12 is fixedly connected to the stator fixing flange 4 by screws.

[0047] Preferably, the rotary motor 2 is a servo motor.

[0048] Preferably, the rotor fixing tray 3 is coaxially mounted with the rotary motor 2.

[0049] Preferably, the axis of the rotary motor 2 is perpendicular to the plane of the base plate 1.

[0050] The stator fixing tray is made of metal, which has good rigidity and stability.

[0051] The XYZ axis alignment platform ensures the movement accuracy and stability of the rotor fixed tray 3 and the stator fixed tray 6.

[0052] The XYZ axis alignment platform 7 is used to support and guide the stator fixing tray to move in the XYZ directions.

[0053] The XYZ axis alignment platform is a whole composed of adjustment modules in the three axes of X, Y, and Z. The X-axis displacement adjustment module 9 is at the lowest part, then the Y-axis displacement adjustment module 8 is connected above it, and then the Z-axis height adjustment module 10 is connected above it.

[0054] X-axis displacement adjustment module 9: Used to control the movement of the stator plate fixing tray in the X-axis direction, adjusting the horizontal distance between the stator plate and the rotor plate. The adjustment screw of the X-axis displacement adjustment module adopts a precision fine-tuning screw to ensure the accuracy and stability of the movement.

[0055] Y-axis displacement adjustment module 8: Used to control the movement of the stator plate fixing tray in the Y-axis direction, adjusting the vertical distance between the stator plate and the rotor plate. The adjustment screw of the Y-axis displacement adjustment module adopts a precision fine-tuning screw to ensure the accuracy and stability of the movement.

[0056] Z-axis height adjustment module 10: Used to control the movement of the stator plate fixing tray in the Z-axis direction and adjust the gap between the stator plate and the rotor plate. The adjustment screw of the Z-axis height adjustment module adopts a precision fine-tuning screw to ensure the accuracy and stability of the movement.

[0057] Example 3

[0058] The perpendicularity error between the axis of the rotary motor 2 and the plane of the base plate 1 does not exceed ±0.05°, and the through pipe 302 is coaxial with the first through hole 601 at the other end of the stator fixing tray 6, with a coaxiality error not exceeding ±0.02mm.

[0059] The stator fixing tray 6 supported by the XYZ axis alignment platform 7 is parallel to the base plate 1, and the parallelism error does not exceed ±0.05. The X-axis displacement adjustment module 9, Y-axis displacement adjustment module 8 and Z-axis height adjustment module 10 all adopt a high-precision ball screw and nut transmission structure, and the displacement adjustment accuracy is not less than ±0.01mm.

[0060] The rotary motor 2 is a servo motor with a rated power of 50-100W and a rated speed of 1000-3000r / min. It has an encoder feedback function and can achieve high-precision position control with a position control accuracy of not less than ±0.01°.

[0061] There is a 1-3mm gap between the rotor fixing tray 3 and the stator fixing tray 6, and they are not connected.

[0062] Assembly steps for a general fixture used for testing and calibrating inductive encoders:

[0063] 1. Fix the rotary motor to the base and ensure that the axis of the rotary motor is perpendicular to the plane of the base.

[0064] Fix the inductive encoder rotor plate to the rotor mounting flange, and fix the rotor mounting flange to the rotor plate mounting tray, ensuring that the axis of the inductive encoder rotor plate is concentric with the axis of the inductive encoder motor.

[0065] The inductive encoder stator plate is fixed to the stator fixing flange, and the stator fixing flange is fixed to the first through hole of the stator fixing tray.

[0066] Fix the stator plate fixing tray onto the Z-axis slide of the XYZ axis alignment platform.

[0067] By adjusting the X-axis adjusting screw of the X-axis displacement adjusting module, the horizontal distance between the inductive encoder stator plate and the inductive encoder rotor plate is adjusted so that their centers are on the same horizontal line; by adjusting the Y-axis adjusting screw of the Y-axis displacement adjusting module, the vertical distance between the inductive encoder stator plate and the inductive encoder rotor plate is adjusted so that their centers are on the same vertical line; by adjusting the Z-axis adjusting screw, the gap between the inductive encoder stator plate and the inductive encoder rotor plate is adjusted to meet the test requirements.

[0068] A general-purpose fixture testing and calibration procedure for inductive encoder testing and calibration:

[0069] a. After the above assembly and adjustment steps are completed, use a testing instrument to measure whether the sine and cosine signals of the inductive encoder meet the design requirements.

[0070] b. After the signal measured in step a meets the requirements, the calibration function of the inductive encoder can be used to make the inductive encoder calculate a calibration value based on the input signal and store it inside the encoder.

[0071] c. Once the inductive encoder has completed signal measurement and calibration, it can be used normally. At this point, a servo driver can be connected to the inductive encoder within this fixture environment to control the rotary motor.

[0072] d. During the operation of the selected motor, continue to measure the various test data indicators of the inductive encoder.

[0073] This invention discloses a universal fixture for testing and calibrating inductive encoders. Through modular design, it can be adapted to inductive encoders of different sizes and specifications, reducing the number of fixtures and lowering testing costs. By replacing the rotor and stator mounting trays with different radii, it can meet the testing needs of inductive encoders of different sizes, providing versatility.

[0074] It should be noted that, in this application, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0075] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A universal fixture for inductance encoder testing and correction, the inductance encoder comprising an inductance encoder stator plate (12) and an inductance encoder rotor plate (11), characterized in that, The jig comprises a bottom plate (1), a rotary motor (2), a rotor fixing tray (3), a stator fixing tray (6) and an XYZ axis alignment platform (7), the bottom of the rotary motor (2) is fixedly installed at one end of the bottom plate (1), the top of the rotary motor (2) is fixedly connected with the bottom of the rotor fixing tray (3), the bottom of the XYZ axis alignment platform (7) is fixedly installed at the other end of the bottom plate (1), the top of the XYZ axis alignment platform (7) is fixedly and slidably connected with the bottom of one end of the stator fixing tray (6), the other end of the stator fixing tray (6) is provided with a first through hole (601), the rotor fixing tray (3) is provided with a through pipe (301), the top of the through pipe (301) of the rotor fixing tray (3) is fixedly installed with a rotor fixing flange (5), the top of the rotor fixing flange (5) is bonded with an inductance encoder rotor plate (11), and the through pipe (301) is coaxial with the first through hole (601) at the other end of the stator fixing tray (6); the rotor fixing tray (3) and the stator fixing tray (6) are spaced apart and not connected, the top of the first through hole (601) of the stator fixing tray (6) is fixedly installed with a stator fixing flange (4), the top of the stator fixing flange (4) is fixedly installed with an inductance encoder stator plate (12), and the stator fixing tray (6) supported by the XYZ axis alignment platform (7) is parallel to the bottom plate (1); during the working of the jig, the rotary motor (2) drives the rotor fixing tray (3) and the inductance encoder rotor plate (11) on the rotor fixing flange (5) to rotate, the XYZ axis alignment platform (7) adjusts the position of the inductance encoder stator plate (12) on the stator fixing flange (4) and the stator fixing tray (6) in the X, Y and Z axis directions, so that the inductance encoder stator plate (12) is accurately aligned with the inductance encoder rotor plate (11).

2. A universal fixture for inductance encoder testing and correction as defined in claim 1, wherein, The structure of the XYZ axis alignment platform (7) comprises an X axis displacement adjustment module (9) installed on the bottom plate (1), an Y axis displacement adjustment module (8) installed at the upper end of the X axis displacement adjustment module (9), a Z axis height adjustment module (10) installed at the upper end of the Y axis displacement adjustment module (8), and the upper end of the Z axis height adjustment module (10) is slidably connected with the stator fixing tray (6); the Z axis height adjustment module (10) of the XYZ axis alignment platform (7) comprises a Z axis sliding table (101) and a Z axis sliding rail (102), the top of the Z axis sliding rail (102) is provided with the Z axis sliding table (101), the Z axis sliding table (101) slides on the Z axis sliding rail (102), and the top of the Z axis sliding table (101) is connected with the bottom of one end of the stator fixing tray (6) through a screw; the X axis displacement adjustment module (9), the Y axis displacement adjustment module (8) and the Z axis height adjustment module (10) all adopt a high-precision screw nut transmission structure.

3. A universal fixture for inductance encoder testing and correction as defined in claim 1, wherein, The bottom of the rotor fixing tray (3) is provided with a second bottom screw hole, the top of the rotary motor (2) is provided with a first top screw hole (302) corresponding to the second bottom screw hole of the rotor fixing tray (3), and the second bottom screw hole is fixedly connected with the first top screw hole (302) through a screw.

4. A universal fixture for inductance encoder testing and correction as defined in claim 1, wherein, The bottom of the rotary motor (2) and the XYZ axis alignment platform (7) is provided with a first bottom screw hole, the bottom plate (1) is provided with a bottom plate screw hole (111) corresponding to the first bottom screw hole, and the first bottom screw hole of the rotary motor (2) and the XYZ axis alignment platform (7) is fixedly connected with the bottom plate screw hole (111) through a screw.

5. A universal fixture for inductance encoder testing and correction as defined in claim 1, wherein, The inductance encoder rotor plate (11) is fixed above the rotor fixing flange through glue.

6. A universal fixture for inductance encoder testing and correction as defined in claim 1, wherein, The through pipe (301) of the rotor fixing tray (3) is matched with the rotor fixing flange (5), the rotor fixing flange (5) is matched with the inductance encoder rotor plate (11), and the stator fixing flange (4) is matched with the inductance encoder stator plate (12).

7. A universal fixture for inductance encoder testing and correction as defined in claim 1, wherein, The rotor fixing flange (5) is fixedly connected with the rotor fixing tray (3) through a screw, the stator fixing flange (4) is fixedly connected with the stator fixing tray (6) through a screw, and the inductance encoder stator plate (12) is fixedly connected with the stator fixing flange (4) through a screw.

8. A universal fixture for inductance encoder testing and correction as defined in claim 1, wherein, The rotary motor (2) is a servo motor.

9. A universal fixture for inductance encoder testing and correction as defined in claim 1, wherein, The rotor fixing tray (3) is coaxially installed with the rotary motor (2).

10. A universal fixture for inductance encoder testing and correction as defined in claim 1, wherein, The axis of the rotary motor (2) is perpendicular to the plane of the bottom plate (1).

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