A high-precision calibration tool for magnetic encoders

Abstract

The utility model relates to a high-precision calibration tool for a magnetic encoder, which includes: a support calibration component: including a frame, a servo motor installed on the frame, a prism and other inertial bodies installed on the main shaft of the servo motor, and a sleeve for connecting the main shaft and the product shaft of the magnetic encoder product; a product positioning component: arranged on the mounting position of the frame, including a product mounting base plate for mounting the magnetic encoder product, a product auxiliary positioning plate for auxiliary zero point positioning, and a product zero point positioning block for zero point positioning; a product clamping component: arranged on the frame, arranged opposite to the product positioning component, to realize the clamping and fixing of the bottom of the magnetic encoder product. Compared with the prior art, the utility model has the advantages of high precision, high repeatability, convenient installation and adjustment, and meeting the mechanical zero point debugging.

Description

Technical Field

[0001] The utility model relates to the field of production and debugging of magnetic encoders, in particular to a high-precision calibration tool for magnetic encoders. Background Art

[0002] A magnetic encoder is a sensor that uses the principle of magnetic field induction to measure angles or displacements. It is commonly used in industrial automation, robotics, machine tools, automotive electronics and other fields. However, due to the influence of actual environmental factors, the output of the magnetic encoder often has errors, so debugging and calibration are required.

[0003] Currently, a high-precision turntable is used for debugging, but this solution has the following problems:

[0004] 1. High-precision turntables are expensive and costly;

[0005] 2. Process matching: the rotary table has a slow speed, and the encoder needs a higher speed device to improve the efficiency of production debugging and inspection, and the low speed does not meet the actual working conditions of the encoder;

[0006] 3. Poor installation repeatability: There are no holes for the magnetic encoder on the turntable disk. It is very difficult to install the magnetic encoder on the turntable in accordance with the requirements. In addition, the irregular and inconsistent installation will cause large differences in the test data of the magnetic encoder, resulting in loss of accuracy and low efficiency.

[0007] 4. Low installation efficiency and poor effect: Currently, three methods are used for fixing: magnetic encoder flange mounting hole, clamping flange mounting boss and using flange clamping groove with eccentric clamp. However, all three methods require screw locking, which is inconvenient and inefficient. In addition, during the debugging process, positioning by product flange will affect the installation concentricity of the encoder and motor shaft and the repeatability of the encoder installation, resulting in loss of accuracy.

[0008] In addition, for magnetic encoder products that need to fix their mechanical zero position during debugging, the zero position is generally set by the mark on the shaft or sleeve corresponding to the housing (such as the center line of the flat end of the magnetic encoder shaft aligning with the zero mark on the flange, which is the mechanical zero position). In the current common motor debugging and turntable debugging solutions, there is no very suitable solution in terms of operability and convenience. Utility Model Content

[0009] In order to solve the technical problems in the background technology, the utility model provides a high-precision calibration tool for a magnetic encoder, which is used to realize the debugging and calibration of the magnetic encoder product. The tool includes:

[0010] Support calibration components: including a frame, a servo motor mounted on the frame, a prism and other inertial bodies mounted on the spindle of the servo motor, and a sleeve for connecting the spindle and the product shaft of the magnetic encoder product;

[0011] Product positioning assembly: It is set at the mounting position of the rack, including a product mounting base plate for mounting the magnetic encoder product, a product auxiliary positioning plate for auxiliary zero point positioning, and a product zero point positioning block for zero point positioning;

[0012] Product clamping assembly: It is arranged on the frame and opposite to the product positioning assembly to realize the clamping and fixing of the bottom of the magnetic encoder product.

[0013] Preferably, the product installation base plate is a long strip plate, the two short sides are arc-shaped matching the shape of the rack installation position, and a circular through hole is opened in the center of the product installation base plate, and product installation positioning grooves are arranged around the circular through hole.

[0014] Preferably, screw holes for matching screws with the mounting positions of the rack to achieve fixation are respectively provided near the edges of the short sides of the product mounting base plate.

[0015] Preferably, the outer edge shape of the product zero point positioning block cooperates with the circular through hole and can rotate in the circular through hole, and a sleeve hole with a first flat position is opened at the center of the product zero point positioning block, and the outer edge of the sleeve is provided with a second flat position that cooperates with the first flat position.

[0016] Preferably, a zero point positioning hole is provided on the enclosure around the circular through hole of the product installation base plate, a pin hole is provided on the product zero point positioning block corresponding to the zero point positioning hole, and the zero point positioning hole and the pin hole are fixed by pins.

[0017] Preferably, the product auxiliary positioning plate is fixed on the product installation base plate by screws and is arranged opposite to the circular through hole, and a semicircular wiring groove is opened on the product auxiliary positioning plate.

[0018] Preferably, a surface of the product auxiliary positioning plate facing the circular through hole is an auxiliary positioning surface that matches the flat shape of the shell of the magnetic encoder product.

[0019] Preferably, the product clamping assembly includes a vertical shaft with its bottom fixed on the frame, a slide rail mounted on the vertical shaft and sliding up and down, a slider sliding horizontally in a slide groove of the slide rail, a quick clamp installed on the slider, and a clamping part arranged at the bottom of the quick clamp.

[0020] Preferably, a plurality of annular grooves are equidistantly provided on the surface of the vertical shaft, the slide rail is positioned by means of ball screws in cooperation with the annular grooves for upward and downward sliding, a plurality of circular holes are equidistantly provided in the slide groove of the slide rail, and the slider is positioned by means of ball screws in cooperation with the circular holes for lateral movement in the slide groove.

[0021] Preferably, the clamping portion comprises a fixing plate connected to the lower end of the quick clamp, a pressing block, and a cylindrical compression spring arranged between the fixing plate and the pressing block.

[0022] Compared with the prior art, the utility model has the following advantages:

[0023] 1. High operating angle accuracy: The tooling of the utility model can obtain accurate angles for debugging the magnetic encoder. By using an autocollimator to precisely calibrate the servo motor, the tooling's highest repeatability accuracy can reach 1", which can meet the debugging and calibration requirements of magnetic encoder products with an accuracy requirement of 10", solving the debugging and calibration problems of high-precision products.

[0024] 2. High repeatability of product installation: The utility model adopts a shaft sleeve to connect the product shaft and the servo motor main shaft and then clamps it firmly, which improves the concentricity of the product shaft and the operating shaft, reduces the precision loss and increases the repeatability of installation.

[0025] 3. Easy installation and adjustment: The utility model provides a clamping solution for product installation. The product can be placed and taken directly without the need for locking screws. It can also adapt to products of different specifications and sizes. The clamping is stable, convenient and practical, and improves efficiency.

[0026] 4. Meet the requirements of mechanical zero point debugging: The utility model ensures that the servo motor is consistent with the product zero position through the product zero point positioning block and the product auxiliary positioning plate. It is suitable for debugging and calibration of products with mechanical zero position, and realizes triple positioning through the product installation positioning groove, zero point positioning block and product auxiliary positioning plate on the product installation base plate to ensure positioning accuracy and effectively improve calibration accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the structure of the utility model without installing the magnetic encoder to be tested.

[0028] Figure 2 This is a schematic diagram of the structure of the utility model for installing the magnetic encoder to be tested.

[0029] Figure 3 Schematic diagram of the structure supporting the calibration component.

[0030] Figure 4a Schematic diagram of the structure of the autocollimator.

[0031] Figure 4b The schematic diagram of the autocollimator.

[0032] Figure 5 This is a schematic diagram of the structure of the product positioning component without the product zero point positioning block installed.

[0033] Figure 6This is a schematic diagram of the structure of the product positioning component for installing the product zero point positioning block.

[0034] Figure 7 This is a schematic diagram of the structure of the product clamping assembly.

[0035] Figure 8 It is a structural diagram of the magnetic encoder to be tested.

[0036] Description of reference numerals:

[0037] 1. Support calibration assembly, 11. Rack, 12. Servo motor, 13. Spindle, 14. Prism and other inertial bodies, 15. Bushing, 2. Product positioning assembly, 21. Product installation base plate, 211. Circular through hole, 212. Product installation positioning groove, 213. Screw hole, 22. Product auxiliary positioning plate, 221. Wiring groove, 23. Product zero point positioning block, 231. Bushing hole, 232. Pin hole, 3. Product clamping assembly, 311. Vertical shaft, 312. Slide rail, 313. Slider, 314. Quick clamp, 315. Cylindrical compression spring, 316. Pressure block, 317. Ball screw, 4. Magnetic encoder product, 41. Shell flat position, 42. Shaft flat position. DETAILED DESCRIPTION

[0038] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and a specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

[0039] It should be noted that in this specification, similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0040] In the description of this embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the tooling or components referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.

[0041] The terms “first”, “second”, etc. are only used for distinguishing descriptions and should not be understood as indicating or implying relative importance.

[0042] In the description of this embodiment, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "disposed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this embodiment can be understood according to specific circumstances.

[0043] In order to make the purpose, technical solution and advantages of the present invention more clear, the implementation mode of the present invention will be further described in detail below with reference to the accompanying drawings.

[0044] Example

[0045] like Figure 1 and 2 As shown, the utility model provides a high-precision calibration tool for a magnetic encoder, which is used to realize high-precision debugging and calibration of magnetic encoder products 4 of different models. The tool is mainly composed of a support calibration component 1, a product positioning component 2 and a product clamping component 3. The product positioning component 2 and the product clamping component 3 are respectively installed on the support calibration component 1. The support calibration component 1 is used to provide corresponding support, realize accurate calibration of the servo motor 12, and calibrate and debug the magnetic encoder product 4 to be debugged. The product positioning component 2 is used to realize the installation, transmission and zero point positioning of the magnetic encoder product 4 to be tested. The product clamping component 3 is used to cooperate with the product positioning component 2 to realize the clamping and fixation of the magnetic encoder product 4.

[0046] The structure and functions of each component are introduced as follows:

[0047] like Figure 3 As shown, the structure of the support calibration component 1 is mainly composed of a frame 11, a servo motor 12, a debugging cabinet, a spindle 13, a prism and other inertial bodies 14 and a sleeve 15. The frame 11 includes a support leg, a lower mounting panel, a side plate and an upper mounting panel arranged in sequence from bottom to top, which are used to provide the installation position of the servo motor 12, the product positioning component 2 and the product clamping component 3 to ensure the flatness and parallelism of their installation surfaces; the servo motor 12 is fixedly installed on the installation position in the center of the lower mounting panel to provide high-precision The operating angle of the servo motor 12 is determined by the operating angle of the servo motor 12, and self-tuning is required for different load conditions to match the corresponding control loop. The debugging cabinet is equipped with a motor driver, a motor controller and a product debugging board, and the overall wiring is arranged to save space. The spindle 13 is the output shaft of the servo motor 12 (in this example, the output shaft is arranged vertically upward), and a mounting position for an inertial body 14 such as a prism or a prism of an autocollimator is provided at the waist of the spindle 13, and a shaft sleeve 15 is provided at the end of the spindle 13 to connect the product shaft of the magnetic encoder product 4 to be tested.

[0048] In order to improve the measurement accuracy of the magnetic encoder product, it is necessary to calibrate the operating angle of the servo motor 12 in this tooling. The support calibration component 1 uses an external autocollimator to accurately obtain the operating angle of the servo motor 12 and feed it back to the motor controller to cooperate with the software to achieve precise calibration of the servo motor 12. Figure 4a As shown in the figure, an autocollimator is a measuring instrument that uses the principle of light self-collimation to convert angle measurement into linear measurement. It is mainly composed of three parts: prism (reflector), objective lens, and eyepiece. Figure 4b As shown in the figure, when the slit light source is located on the focal plane of the objective lens, the light will be refracted into a parallel light beam by the objective lens, and then reflected back along the original path by a plane reflector perpendicular to the optical axis. If the plane reflector is deflected, the image formed after the radiation light beam is focused will deviate from the original position of the slit light source. Finally, the minute inclination angle of the reflector to the plane perpendicular to the optical axis can be accurately measured by reading through the eyepiece, and the resolution can reach 1″. The shape of the prism is a regular polyhedral steel body with a through hole in the center.

[0049] How to use the autocollimator:

[0050] First, the prism is installed on the mounting position of the main shaft 13 supporting the calibration assembly 1, and then the servo motor 12 is self-tuned to match the working condition. Finally, the motor controller inputs the theoretical angle and drives the servo motor 12 to rotate through the motor driver, and the angle deviation is read by the autocollimator, so that the accuracy of the tooling can be detected, and the angle deviation can be used as feedback to calibrate the servo motor 12. It is known that in the application of the servo motor 12, a slight change in the load will cause the output torque of the servo motor 12 to be unstable, thereby affecting the accuracy of the control angle rotation. In the utility model, considering the influence of the prism as the motor load on the servo motor 12, after the calibration of the servo motor 12 is completed, it is necessary to replace the prism with a prism isoinertia body 14 with the same moment of inertia as the prism to make the practical working condition of the servo motor 12 consistent with that after being calibrated by the autocollimator, thereby ensuring that the accuracy of the servo motor 12 will not change when it is calibrated by the autocollimator and when it is actually used and debugged, and can maintain the same accuracy as the autocollimator.

[0051] Furthermore, based on the application of the above-mentioned autocollimator in the magnetic encoder debugging tooling, the precise calibration method of the servo motor 12 is specifically as follows:

[0052] In the process of fine calibration of the servo motor by the autocollimator, the initial position of the prism is first set as the initial position zero point of the servo motor 12, and the input angle value is controlled by the motor controller and the motor driver to drive the prism to rotate one facet each time, and then the deviation value of the input angle is measured by the autocollimator to obtain the actual angle value, thereby obtaining the corresponding relationship between the input angle and the actual angle, and the linear interpolation of the two is performed by the piecewise linear interpolation method to obtain the linear curve of the corresponding relationship. By looking up the table or the diagram, a more accurate operating angle can be obtained, so that the accuracy of the tooling is further improved.

[0053] Furthermore, after obtaining the piecewise linear curve corresponding to the input angle and the actual angle, the piecewise linear curve is set as a program through software. When using the program, the preset debugging and calibration angle is manually input. The program obtains the corresponding input angle of the servo motor according to the piecewise linear curve, and then sends the input angle to the command to control the operation of the servo motor, so that the actual operation angle of the servo motor is equal to the preset debugging and calibration angle. In this way, the accuracy and convenience of the tooling are greatly improved through unified working conditions, compensation correction, and software fitting. Since the tooling uses a high-precision autocollimator for motor calibration, the calibration accuracy of the tooling can reach 1", and when calibrating the magnetic encoder product, the calibration accuracy of the magnetic encoder product can be greatly improved to 10".

[0054] like Figure 5 and 6 As shown, the structure of the product positioning component 2 is mainly composed of a product mounting base plate 21, a product auxiliary positioning plate 22, and a product zero point positioning block 23. The product mounting base plate 21 is arranged on the mounting position at the center of the upper mounting panel and fixed by screws. The product mounting base plate 21 is installed with a product auxiliary positioning plate 22 and a product zero point positioning block 23.

[0055] In this example, the product installation base plate 21 is in the shape of a long strip, and the edge in the length direction is an arc shape that matches the installation position of the upper installation panel. Screw holes 213 are respectively opened on both sides of the product installation base plate 21 for fixing it to the installation position of the upper installation panel by screws. At the same time, a circular through hole 211 is opened at the center of the product installation base plate 21, and a product installation positioning groove 212 is provided around the circular through hole 211. The shape of the product installation positioning groove 212 matches the top surface of the outer shell of the magnetic encoder product to be tested.

[0056] Furthermore, the shape of the product installation positioning groove 212 can be circular, square or other shapes, and the shape of the product installation positioning groove 212 can be matched with the shape of the housing according to actual conditions.

[0057] The product zero point positioning block 23 is cylindrical as a whole and is rotatably arranged in the circular through hole 211, and a sleeve hole 231 with a flat position is opened at the center of the product zero point positioning block 23. The product zero point positioning block 23 is sleeved on the sleeve 15 with a flat position on the outer edge through the sleeve hole 231 to achieve zero point positioning. In addition, a pin hole 323 is also opened on the product zero point positioning block 23, and the pin hole 232 cooperates with the zero point positioning hole opened on the surrounding plate around the circular through hole 211 and is positioned by a pin.

[0058] The product auxiliary positioning plate 22 is used for auxiliary zero point positioning of the magnetic encoder product 4 with a mechanical zero point. The product auxiliary positioning plate 22 is installed on the product mounting base plate 21 by screws and is arranged opposite to the circular through hole 211. A semicircular wiring groove 221 is provided on the product auxiliary positioning plate 22. After the magnetic encoder product 4 with a mechanical zero point is installed, the product auxiliary positioning plate 22 cooperates with the shell flat position 41 of the magnetic encoder product 4 for positioning.

[0059] The product positioning component 2 can meet the debugging of the magnetic encoder product 4 which needs to fix the mechanical zero point position first. When in use, first set the zero point of the product positioning component 2, install the shaft sleeve 15 on the main shaft 13, and then install the product mounting base plate 21 on the upper mounting panel of the frame 11; in the initial state, the servo motor 12 is not powered on and can rotate freely, align the product zero point positioning block 23 with the flat position of the shaft sleeve 15 for installation, and then rotate the product zero point positioning block 23 to align the pin hole 232 with the zero point positioning hole on the product mounting base plate 21, and fix it with a pin. At this time, the position of the bushing 15 is relatively fixed relative to the product mounting base plate 21, that is, the product shaft is relatively fixed relative to the product shell, that is, the mechanical zero point position of the magnetic encoder product 4 is fixed, and then the servo motor 12 is powered on to record this point position as the debugging starting point of the encoder product 4; finally, the zero point positioning block 24 is removed, and the magnetic encoder product 4 is installed, so that the shaft flat position 42 of the product shaft of the magnetic encoder product 4 is aligned with the bushing 15, and the shell flat position 41 on the shell of the magnetic encoder product 4 is aligned with the product auxiliary positioning plate 22 as a positioning feature, and then the fixed zero point type magnetic encoder debugging and calibration can be started.

[0060] After the product shaft alignment sleeve 15 is installed in place, the concentricity between the product shaft of the magnetic encoder product 4 and the main shaft 13 of the servo motor 12 is well guaranteed because the shaft is directly connected without end face positioning conversion.

[0061] like Figure 7 As shown, the product clamping assembly 3 is composed of a vertical shaft 311, a slide rail 312, a slider 313, a quick clamp 314, a cylindrical compression spring 315, a pressure block 316 and a plurality of ball screws, which are described in detail below.

[0062] The bottom of the vertical shaft 311 is fixedly mounted on the upper mounting panel of the frame 11, and a plurality of equally spaced annular grooves are opened on the cylindrical surface of the vertical shaft 311 (the distance between adjacent grooves is set according to the actual height adjustment requirements);

[0063] The slide rail 312 is composed of an integrally formed sleeve part and a slide groove part. A through hole matching the diameter of the vertical shaft 311 is provided in the sleeve part, and a plurality of ball screws are installed on the sleeve part relative to the through hole. The slide rail 312 is sleeved on the vertical shaft 311 through the sleeve part, and can rotate in a plane along the circular groove, and the up and down movement of the slide rail 312 is limited by sliding the sleeve part up and down and sliding it into the corresponding circular groove by means of the ball screws; the slide groove part has a plurality of holes equidistantly provided in the extension direction of the slide groove, and the slider 313 can slide horizontally along the slide groove. The slider 313 is provided with ball screws matching the holes. When the slider 314 needs to be slid to adjust its position, the slider 314 is horizontally slid in the slide groove and positioned by means of the ball screws embedded in the holes.

[0064] The quick clamp 314 is installed on the slider 313, including a handle, an L-shaped connector and a movable connecting rod. The rotating end of the handle is hinged to one end of the L-shaped connector, and the other end of the L-shaped connector is hinged to the upper end of the movable connecting rod, so that the movable connecting rod can move up and down in the limiting hole. A spring fixing plate is fixed at the end of the quick clamp, that is, the lower end of the movable connecting rod. The spring fixing plate and the spring pressure block 316 are connected by a spring guide rod, and a cylindrical compression spring 315 is arranged outside the spring guide rod.

[0065] When in use, first adjust the slide rail 312 to the corresponding height according to the height of the magnetic encoder product to be tested, and the ball screw on the slide rail 312 clamps the annular groove on the vertical shaft 311. At this time, the slide rail 312 needs to overcome the spring force in the ball screw to move up and down, and the left and right rotation is less restricted; then adjust the position of the slider 313 on the slide rail 312 to the product until the ball screw on the slider 313 clamps the hole at the corresponding position on the slide rail 312 to limit its sliding; finally, turn the handle to press the quick clamp 314 downward, and press the bottom surface of the product through the spring force of the cylindrical compression spring 315. When taking out the magnetic encoder product, you only need to loosen the quick clamp 314 and rotate the slide rail 312 horizontally, and the product can be taken out from the product positioning sleeve 22. The product clamping assembly 3 realizes the vertical clamping of the product, ensures the concentricity between the product and the main shaft 13 of the servo motor 12, and cooperates with the ball screw to enable the product to be quickly clamped and adjusted quickly, with stronger compatibility.

[0066] Based on the above magnetic encoder tooling, the steps of debugging and calibrating the magnetic encoder product to be debugged in the utility model are as follows:

[0067] 1. Complete the installation of the main components of the magnetic encoder debugging tooling and perform fine calibration of the servo motor. The specific steps are as follows:

[0068] Assemble the magnetic encoder debugging tooling, accurately install the prism on the spindle mounting position, keep the prism mirror surface vertical, install the autocollimator on a stable base to ensure stability, adjust the autocollimator so that the light beam it emits is vertically irradiated on the center of the prism mirror surface, and connect the servo motor, motor controller and motor driver; set the initial position of the prism to the initial position zero point of the servo motor, input the angle rotation command to the motor controller, and control the servo motor through the motor driver to drive the prism to rotate one facet each time it rotates (in this example, the prism cross-section used is a regular 23-hedron, and the angle of each rotation is 360° / 23), measure the deviation value relative to each input angle through the autocollimator, sum it up to get the actual angle value, and thus get the corresponding relationship between the input angle and the actual angle, and use the piecewise linear interpolation method based on the corresponding relationship to perform linear interpolation to get the piecewise linear curve of the corresponding relationship, and save the piecewise curve data in the motor controller;

[0069] 2. After completing the fine calibration of the servo motor, remove the prism from the spindle and install the prism and other inertial bodies on the spindle to ensure that the load of the servo motor remains unchanged and the accuracy remains unchanged before and after the servo motor calibration;

[0070] 3. After zero-point positioning of the servo motor's spindle, remove the product zero-point positioning block, place the magnetic encoder product to be debugged in the product positioning sleeve, and use the product clamping assembly to firmly clamp the side and bottom surfaces;

[0071] 4. Start the debugging program through the product debugging board in the debugging cabinet, and automatically debug and calibrate the magnetic encoder product to be debugged and calibrated. After completion, loosen the product clamping assembly and remove the magnetic encoder product to be debugged.

[0072] The specific steps for debugging and calibrating the magnetic encoder product to be debugged and calibrated are as follows:

[0073] First, select multiple calibration points within the range of the magnetic encoder to be debugged and calibrated, namely θ1, θ2...θ n ...θ N , each calibration point can be selected at equal intervals, or at unequal intervals according to actual calibration requirements. For example, when the magnetic encoder is actually used, it is more frequent in the range of 10-15°. If the accuracy in this range needs to be improved, you can set more calibration points in this range and reduce the interval between calibration points. The rest of the range can be selected as normal;

[0074] Then send a command to the calibrated servo motor to make the servo motor rotate to the set calibration point angle in turn, and record the angle output value corresponding to each calibration point angle;

[0075] Finally, multi-segment linear interpolation is performed on the calibration point angle and the corresponding angle output value to obtain the linear calibration curve corresponding to each calibration interval. These linear calibration curves are saved in the magnetic encoder product memory to complete the debugging and calibration of the magnetic encoder product.

[0076] In summary, the utility model provides a high-precision calibration tool for a magnetic encoder. By using a high-precision autocollimator to precisely calibrate the servo motor, the maximum repeatability of the tool can reach 1", which can meet the debugging and calibration requirements of magnetic encoder products with an accuracy requirement of 10". When debugging and calibrating products with mechanical zero positions, triple positioning is achieved through the cooperation between the product installation positioning groove and the top surface of the product shell, the cooperation between the product flat surface and the product auxiliary positioning plate, and the cooperation between the zero point positioning block and the servo motor spindle, which effectively ensures the positioning accuracy and improves the calibration accuracy. It can be seen that the magnetic encoder debugging tool has the advantages of high precision, high repeatability, easy installation and adjustment, and meets the mechanical zero point debugging requirements.

[0077] The preferred specific embodiments of the utility model are described in detail above. It should be understood that ordinary technicians in this field can make many modifications and changes based on the concept of the utility model without creative work. Therefore, all technical solutions that can be obtained by technicians in this technical field based on the concept of the utility model through logical analysis, reasoning or limited experiments on the basis of the existing technology should be within the scope of protection determined by the claims.

Claims

1. A high-precision calibration tool for a magnetic encoder, used to implement the debugging and calibration of a magnetic encoder product (4), characterized in that: The tooling includes: A support calibration assembly (1): comprising a frame (11), a servo motor (12) mounted on the frame (11), a prism and other inertia bodies (14) mounted on a main shaft (13) of the servo motor (12), and a sleeve (15) for connecting the main shaft (13) and a product shaft of a magnetic encoder product (4); A product positioning assembly (2): arranged at the mounting position of the frame (11), comprising a product mounting base plate (21) for mounting the magnetic encoder product (4), a product auxiliary positioning plate (22) for performing auxiliary zero point positioning, and a product zero point positioning block (23) for performing zero point positioning; Product clamping component (3): arranged on the frame (11), arranged opposite to the product positioning component (2), and used to clamp and fix the bottom of the magnetic encoder product (4).

2. The high-precision calibration tool for a magnetic encoder according to claim 1, characterized in that: The product installation base plate (21) is a long strip plate, and its two short sides are in an arc shape matching the shape of the mounting position of the frame (11), and a circular through hole (211) is provided in the center of the product installation base plate (21), and a product installation positioning groove (212) is provided around the circular through hole (211).

3. The high-precision calibration tool for a magnetic encoder according to claim 1, characterized in that: The product installation base plate (21) is provided with screw holes (213) near the edges of the short sides for fixing with screws to the installation positions of the frame (11).

4. The high-precision calibration tool for a magnetic encoder according to claim 2, characterized in that: The outer edge shape of the product zero point positioning block (23) matches the circular through hole (211) and can rotate in the circular through hole, and a sleeve hole (231) with a first flat position is opened at the center of the product zero point positioning block (23), and the outer edge of the sleeve (15) is provided with a second flat position matching the first flat position.

5. The high-precision calibration tool for a magnetic encoder according to claim 4, characterized in that: The product installation base plate (21) is provided with a zero point positioning hole on the enclosure plate around the circular through hole (211), and a pin hole (223) is provided on the product zero point positioning block (23) corresponding to the zero point positioning hole, and the zero point positioning hole and the pin hole (223) are fixed by a pin.

6. The high-precision calibration tool for a magnetic encoder according to claim 2, characterized in that: The product auxiliary positioning plate (22) is fixed on the product installation base plate (21) by means of screws and is arranged opposite to the circular through hole (211), and a semicircular wiring groove (221) is provided on the product auxiliary positioning plate (22).

7. The high-precision calibration tool for a magnetic encoder according to claim 6, characterized in that: The side of the product auxiliary positioning plate (22) facing the circular through hole (211) is an auxiliary positioning surface that matches the shape of the housing flat part (41) of the magnetic encoder product (4).

8. The high-precision calibration tool for a magnetic encoder according to claim 1, characterized in that: The product clamping assembly (3) comprises a vertical shaft (311) whose bottom is fixed on the frame (11), a slide rail (312) sleeved on the vertical shaft (311) and slidably positioned up and down, a slider (313) sliding horizontally in a slide groove of the slider (312), a quick clamp (314) mounted on the slider (313), and a pressing portion arranged at the bottom of the quick clamp (314).

9. The high-precision calibration tool for a magnetic encoder according to claim 8, characterized in that: The surface of the vertical shaft (311) is provided with a plurality of annular grooves at equal intervals, the slide rail (312) is configured to slide up and down by means of ball screws in conjunction with the annular grooves, a plurality of circular holes are configured to slide in the groove of the slide rail (312) at equal intervals, and the slider (313) is configured to move horizontally in the groove by means of ball screws in conjunction with the circular holes.

10. The high-precision calibration tool for a magnetic encoder according to claim 8, characterized in that: The clamping portion comprises a fixing plate connected to the lower end of the quick clamp (314), a pressing block (316), and a cylindrical compression spring (315) arranged between the fixing plate and the pressing block (316).

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