An automatic encoder calibration workbench

Abstract

This utility model discloses an automatic encoder calibration workbench, comprising: an automatic linear drive module, a calibration scale, a placement stage, and a detection component; the calibration scale is connected to the automatic linear drive module and is arranged parallel to the driving direction of the automatic linear drive module; the placement stage is connected to the moving end of the automatic linear drive module and is used to place the encoder to be calibrated; the detection component is connected to the moving end of the automatic linear drive module and maintains a signal connection with the encoder to be calibrated during the calibration process; wherein, the automatic linear drive module synchronously drives the placement stage and the detection component to perform linear movement relative to the calibration scale to complete the encoder calibration. Compared with manual methods, its movement process is more stable and the speed is more uniform, thereby improving calibration accuracy. Simultaneously, a reference scale component is added to the automatic linear drive module to provide standard calibration information, thereby further ensuring the reliability of the calibration results.

Description

Technical Field

[0001] This utility model relates to the field of calibration workbench technology, and in particular to an automatic encoder calibration workbench. Background Technology

[0002] An encoder is a device that encodes signals or data and converts them into a signal format that can be used for communication, transmission, and storage. Encoders are typically used to convert angular and linear displacement signals into electrical signals, and then use these electrical signals to calculate the magnitude of the angular or linear displacement.

[0003] Encoders need to be calibrated before leaving the factory to ensure their detection accuracy. Existing encoder calibration generally uses a combination calibration worktable with a guide rail slider assembly, a spring needle detection assembly, and a magnetic scale. During the calibration process, the elastic detection assembly is manually pushed and pulled to move linearly relative to the guide rail, thereby enabling automatic calibration by the encoder sensing the signal from the magnetic scale.

[0004] However, the existing manual encoder calibration method is unstable due to manual pushing and pulling, resulting in unreliable encoder calibration results and low detection efficiency, which affects the calibration efficiency. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide an automatic encoder calibration workbench to solve the technical problems of unreliable results and low efficiency caused by the existing manual encoder calibration method.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: An embodiment of this utility model provides an automatic encoder calibration workbench, which includes: an automatic linear drive module, a calibration scale, a placement stage, and a detection component; The calibration scale is connected to the automatic linear drive module and is set parallel to the driving direction of the automatic linear drive module; The placement platform is connected to the moving end of the automatic linear drive module, and the placement platform is used to place the encoder to be calibrated; The detection component is connected to the moving end of the automatic linear drive module, and the detection component maintains a signal connection with the encoder to be calibrated during the calibration process; The automatic linear drive module synchronously drives the placement stage and the detection component to move linearly relative to the calibration scale to complete the encoder calibration.

[0007] The calibration scale is a magnetic grating scale.

[0008] The automatic linear drive module has a support member on its mobile end, and a push-pull clamp on the support member. The detection component is connected to the push-pull clamp, and the push-pull clamp can drive the detection component to approach and signal-connect to the encoder to be detected or to move away from and detach from the encoder to be detected.

[0009] The detection component includes a detection stage and a plurality of detection probes connected to the detection stage.

[0010] The automatic encoder calibration workbench also includes a reference scale assembly, which includes a reference scale and a sensor connected to the moving end of the automatic linear drive module.

[0011] The reference scale is a magnetic grating scale with the same structure as the calibration scale.

[0012] The magnetic scale is a magnetic scale with a pitch of 1-100mm.

[0013] The automatic encoder calibration workbench also includes a control button assembly, which is electrically connected to the automatic linear drive module and the detection component.

[0014] The control button assembly includes an emergency stop control button, a linear module power control button, a detection component power-on control button, and an automatic calibration start button.

[0015] The automatic encoder calibration workbench also includes a base, and the control button assembly and the automatic linear drive module are both connected to the base.

[0016] This invention relates to an automatic encoder calibration workbench, which uses an automatic linear drive module as the power mechanism during the calibration process to drive the encoder under test to move relative to the magnetic scale. Compared with manual methods, the movement is more stable and the speed is more uniform, thereby improving calibration accuracy. Simultaneously, a reference scale component is added to the automatic linear drive module to provide standard calibration information, further ensuring the reliability of the calibration results.

[0017] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model, it can be implemented according to the contents of the specification. In order to make the above and other objects, features and advantages of this utility model more obvious and easy to understand, the following are preferred embodiments, which are described in detail below. Attached Figure Description

[0018] Figure 1 and Figure 2 These are schematic diagrams of the overall structure of the automatic encoder calibration workbench from different perspectives, representing embodiments of this utility model.

[0019] Figure 3 and Figure 4 These are schematic diagrams of the automatic encoder calibration workbench of this utility model from different perspectives, with the base removed.

[0020] Figure 5 This is a side view of the automatic encoder calibration workbench according to an embodiment of the present invention.

[0021] Figure 6 This is a top view of the automatic encoder calibration workbench according to an embodiment of the present invention.

[0022] Figure 7 for Figure 3 The diagram shows the structure with the automatic linear drive module removed.

[0023] Figure 8 This is an exploded structural diagram of the push-pull clamp and placement platform of the automatic encoder calibration workbench according to an embodiment of the present invention.

[0024] Figure 9 for Figure 5 The diagram shows a magnified view of part A.

[0025] Figure 10 for Figure 7 The diagram shows a magnified view of part B.

[0026] Explanation of reference numerals in the attached figures: Automatic encoder calibration workbench 100, base 1, control button assembly 2, automatic linear drive module 3, push-pull clamp 4, support 5, placement platform 6, reference scale assembly 7, calibration scale 8, detection assembly 9, moving end 31, support 32, handle 41, adapter 42, piston cylinder 43, guide block 44, guide rod 45, connecting plate 46, placement slot 61, reference scale 71, sensor 72, detection platform 91, detection probe 92, encoder 200. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0029] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0030] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0031] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0032] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0033] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. The illustrative expressions of the above terms in this specification should not be construed as necessarily referring to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0034] An encoder is a device that encodes and converts signals or data into a signal format that can be used for communication, transmission, and storage. Encoders are typically used to convert angular and linear displacement signals into electrical signals, and then calculate the magnitude of the angular or linear displacement using these electrical signals. Encoders need to be calibrated before leaving the factory to ensure their detection accuracy. Existing encoder calibration generally uses a combination of a guide rail slider assembly, a spring-loaded detection assembly, and a magnetic scale on a calibration table. During calibration, the spring-loaded detection assembly is manually pushed and pulled to move linearly relative to the guide rail, thereby allowing the encoder to sense the signal from the magnetic scale and achieve automatic calibration.

[0035] However, existing manual encoder calibration methods suffer from instability due to manual pushing and pulling, resulting in unreliable calibration results and low detection efficiency, thus affecting calibration efficiency. Therefore, based on the above requirements, this embodiment provides an automatic encoder calibration workbench 100.

[0036] Please see Figures 1 to 10 This embodiment provides an automatic encoder calibration workbench 100, which includes: an automatic linear drive module 3, a calibration scale 8, a placement stage 6, and a detection component 9; The calibration scale 8 is connected to the automatic linear drive module 3 and is set parallel to the driving direction of the automatic linear drive module 3; The placement platform 6 is connected to the moving end 31 of the automatic linear drive module 3, and the placement platform 3 is used to place the encoder 200 to be calibrated. The detection component 9 is connected to the moving end 31 of the automatic linear drive module 3, and the detection component 3 maintains a signal connection with the encoder 200 to be calibrated during the calibration process. The automatic linear drive module 3 synchronously drives the placement stage 6 and the detection component 9 to perform linear movement relative to the calibration scale 8, and the encoder 200 automatically senses the calibration scale signal to complete the initial calibration of the encoder.

[0037] The automatic linear drive module 3 is used to realize the automatic linear drive function and replace the manual push-pull mechanism in the existing calibration equipment. The automatic linear drive module 3 includes a linear screw module, a linear belt module, or a linear motor, etc., which is used to drive the moving end 31 to perform linear reciprocating movement so as to synchronously drive the encoder 200 to be tested to move relative to the calibration scale 8. During the movement of the encoder 200 relative to the calibration scale 8, it achieves automatic calibration by periodically sensing the signal of the calibration scale 8.

[0038] The automatic linear drive module 3 further includes: a support 32, a linear guide rail, a drive module, and a transmission component disposed within the support 32. The output end of the drive module is connected to the transmission component, and the transmission component is connected to the moving end 31. The moving end 31 is slidably connected to the linear guide rail via a slider. The drive module can perform forward and reverse rotation to drive the moving end 31 to reciprocate linearly under the guidance of the linear guide rail. The moving end 31 is a connecting block controlled by the movement of the transmission component.

[0039] The calibration scale 8 can provide periodic sensing signals, such as electrical signals, magnetic signals or sound wave signals, to the encoder 200 to be tested. In this embodiment, the calibration scale 8 provides a sinusoidal signal to the encoder 200. When the encoder 200 moves at a constant speed, the encoder 200 can sense the periodic signal on the calibration scale 8 and complete automatic calibration according to the sensed periodic signal.

[0040] Specifically, the calibration scale 8 is fixedly connected to the support 32 of the automatic linear drive module 3.

[0041] The placement platform 6 is provided with a placement slot 61 for placing the encoder 200 to be tested. The placement slot 61 has a groove-shaped structure adapted to the external dimensions of the encoder 200, which can fix the encoder 200 in place, ensuring a good electrical connection between the encoder 200 and the testing component 9 during the testing process. Specifically, the placement platform 6 is fixedly connected to the moving end 31 of the automatic linear drive module 3. When the moving end 31 is moved under control, it synchronously drives the placement platform 6 to move, thereby achieving relative movement with the calibration scale 8.

[0042] In this embodiment, the calibration scale 8 is a magnetic grid scale. A magnetic grid scale is a high-precision displacement measuring device based on the principle of magnetoelectric conversion, mainly used for the detection of linear or angular displacement. It acquires position signals through the interaction between the magnetic scale and the magnetic head, and is widely used in industrial automation, CNC machine tools, precision measurement and other fields.

[0043] Please refer to it again. Figure 3 and Figure 4The moving end 31 of the automatic linear drive module 3 is also connected to a support member 5. The support member 5 is provided with a push-pull clamp 4. The detection component 9 is connected to the moving end of the push-pull clamp 4. The push-pull clamp 4 can drive the detection component 9 to approach and signal connect to the encoder 200 to be detected or to move away from and detach from the encoder 200 to be detected. When the push-pull clamp 4 drives the detection component 9 to detach from the encoder, it can be used for loading or unloading the encoder 200.

[0044] Specifically, when calibrating the encoder 200, the encoder 200 is first placed in the placement slot 61 on the placement platform 6. Then, the push-pull clamp 4 is operated. The push-pull clamp 4 drives the detection component 9 to descend and connects its signal connection terminal to the signal terminal of the encoder 200. At this time, the push-pull clamp 4 is locked in the current state. During the calibration of the encoder 200, the push-pull clamp 4 is fixedly connected to the moving end 31 of the automatic linear drive module 3 through the support member 5. Therefore, the push-pull clamp 4 and the support member 5 synchronously follow the moving end 31 to perform reciprocating linear movement.

[0045] Please see Figure 10 The push-pull clamp 4 includes a connecting plate 46, a handle 41, an adapter 42, a piston cylinder 43, a guide block 44, and a guide rod 45. The upper end of the handle 41 is hinged to the connecting plate 46, and the lower end is hinged to the adapter 42. The bottom of the adapter 42 is hinged to the piston cylinder 43, and the moving end of the piston cylinder 43 is fixedly connected to the detection assembly 9. The guide block 44 is fixedly connected to the support member 5, and the guide rod 45 passes through the guide hole in the guide block 44, with the lower end of the guide rod 45 fixedly connected to the detection assembly 9. When the handle 41 is pushed upward, the piston cylinder 43 is simultaneously pulled upward, causing the moving end of the piston cylinder 43 to move the detection assembly 9 away from the encoder 200 to be tested. Conversely, if the handle 41 is manually pushed downward, the piston cylinder 43 is simultaneously lowered, causing the moving end of the piston cylinder 43 to move the detection assembly 9 downward until the detection probe 92 of the detection assembly 9 is electrically connected to the wiring terminal of the encoder 200. The piston cylinder 43 has an automatic locking function at the highest and lowest positions, meaning that when the external force is released, the piston cylinder 43 can still remain in the current state.

[0046] Please refer to it again. Figure 9 and Figure 10The detection component 9 includes a detection platform 91 and a plurality of detection probes 92 connected to the detection platform 91. The detection platform 91 is connected to the moving end of the push-pull clamp 4, specifically, the detection platform 91 is fixedly connected to the moving end of the piston cylinder 43. The detection platform 91 is used to fix the detection probes 92. The ends of the detection probes 92 extend from the bottom surface of the detection platform 91. When the detection platform 91 descends with the push-pull clamp 4, the ends of the detection probes 92 extending from the bottom surface of the detection platform 91 abut against the terminals of the encoder 200. The upper ends of the detection probes 92 are connected to a power source, and the encoder 200 to be tested is powered through the detection probes 92, so that the encoder 200 reads the sensing signal of the calibration scale 8 when it moves relative to the calibration scale 8.

[0047] In this embodiment, the automatic encoder calibration workbench 100 improves the existing manual push-pull guide rail structure into an electric linear drive automatic linear drive module 3 structure to realize the automatic process of encoder calibration. Compared with the existing manual method, its calibration process is more stable and the calibration results are more accurate.

[0048] Please refer to it again. Figure 4 and Figure 7 The automatic encoder calibration workbench 100 also includes a reference scale assembly 7, which includes a reference scale 71 and a sensor 72 connected to the moving end 31 of the automatic linear drive module 3. The reference scale 71 and the calibration scale 8 have identical structures, meaning they can generate the same calibration signal. The sensor 72, also called a magnetic head or signal sensor, is used to read the calibration signal from the reference scale 71. The reference scale 71 and the calibration scale 8 are symmetrically connected to the support 32 of the automatic linear drive module 3, and the sensor 72 and the reference scale 71 are calibrated standard scales. The sensor 72 follows the moving end 31 of the automatic linear drive module 3, moving linearly synchronously with the encoder 200. By comparing the calibration result of the reference scale assembly 7 with the calibration result of the encoder 200 itself, the accuracy of the calibration result is ensured.

[0049] In this embodiment, the reference scale 71 is a magnetic grating scale with the same structure as the calibration scale 8.

[0050] Specifically, both the reference scale 71 and the calibration scale 8 are 1-100mm pitch magnetic scales. It is understood that in other embodiments, magnetic scales with other pitches may be used depending on the encoder calibration requirements.

[0051] like Figure 1 and Figure 2As shown, to achieve fully automated encoder calibration, the automatic encoder calibration workbench 100 also includes a control button assembly 2. The signal terminal of the control button assembly 2 is electrically connected to the automatic linear drive module 3 and the detection component 9. This control button assembly 2 is mainly used to control the start and stop of the automatic linear drive module 3 and the detection component 9.

[0052] Specifically, the control button assembly 2 includes an emergency stop control button, a linear module power control button, a detection component power-on control button, and an automatic calibration start button.

[0053] The automatic encoder calibration workbench 100 also includes a base 1, and the control button assembly 2 and the automatic linear drive module 3 are both connected to the base 1.

[0054] Please refer to it again. Figures 1 to 10 The calibration principle of the encoder on the automatic encoder calibration workbench in this embodiment is as follows: After the encoder 200 is powered on, during the relative movement between the encoder 200 and the magnetic scale, the magnetoresistive chip of the encoder 200 reads the best sine and cosine signals and feeds them back to the interpolation subdivision chip of the encoder 200. Then, the interpolation subdivision chip processes the best sine and cosine signals fed back by the encoder magnetoresistive chip and completes self-calibration.

[0055] The calibration process for the automatic encoder calibration workbench 100 is as follows: In use, first place the encoder 200 (the calibration object) on the encoder placement platform 6, then press the relevant power buttons (linear module power control button, detection component power-on control button), and then press down the detection component 9 using the push-pull clamp 4, so that the metal detection probe 92 contacts the metal contacts on the encoder 200. Then, start the automatic calibration control button to make the automatic linear drive module 3 run stably, achieving the purpose of calibrating the encoder 200. The automatic linear drive module 3 adopts a dual-grid design with a calibration scale 8 and a reference scale component 7. The calibration fixture of the encoder 200 is placed on one side, and the finished magnetic encoder is installed on the other side. The dual-grid design effectively avoids the influence of vibration, inconsistent calibration distance, poor contact of calibration test points, etc. on the calibration data during the calibration process.

[0056] The automatic encoder calibration workbench 100 in this embodiment uses an automatic linear drive module 3 as the power mechanism in the calibration process and adds control buttons to drive the encoder 200 under test to move relative to the magnetic scale. Compared with the manual method, its movement process is more stable and the speed is more uniform, thereby improving the calibration accuracy. At the same time, a reference scale component is also added to the automatic linear drive module to provide standard calibration information, thereby further ensuring the reliability of the calibration results.

[0057] The above examples are merely illustrative of the technical content of this utility model to facilitate reader understanding, but do not imply that the implementation of this utility model is limited to these embodiments. Any technical extensions or re-creations made based on this utility model are protected by this utility model. The scope of protection of this utility model is defined by the claims.

Claims

1. An autoencoder calibration workbench, characterized by, include: Automatic linear drive module, calibration scale, placement stage and detection components; The calibration scale is connected to the automatic linear drive module and is set parallel to the driving direction of the automatic linear drive module; The placement platform is connected to the moving end of the automatic linear drive module, and the placement platform is used to fix the encoder to be calibrated; The detection component is connected to the moving end of the automatic linear drive module, and the detection component maintains a signal connection with the encoder to be calibrated during the calibration process; The automatic linear drive module synchronously drives the placement stage and the detection component to move linearly relative to the calibration scale to complete the encoder calibration.

2. The autoencoder calibration workbench of claim 1, wherein, The calibration scale is a magnetic grating scale.

3. The automatic encoder calibration workbench according to claim 2, characterized in that, The mobile end of the automatic linear drive module is provided with a support member, and the support member is provided with a push-pull clamp. The detection component is connected to the push-pull clamp. The push-pull clamp can drive the detection component to approach and signal-connect to the encoder to be detected or to move away from and detach from the encoder to be detected.

4. The automatic encoder calibration workbench according to claim 3, characterized in that, The detection component includes a detection stage and a plurality of detection probes connected to the detection stage.

5. The automatic encoder calibration workbench according to any one of claims 1 to 4, characterized in that, The automatic encoder calibration workbench also includes a reference scale assembly, which includes a reference scale and a sensor connected to the moving end of the automatic linear drive module.

6. The automatic encoder calibration workbench according to claim 5, characterized in that, The reference scale is a magnetic grating scale with the same structure as the calibration scale.

7. The automatic encoder calibration workbench according to claim 6, characterized in that, The magnetic scale is a 1-100mm pitch magnetic scale.

8. The automatic encoder calibration workbench according to claim 5, characterized in that, The automatic encoder calibration workbench also includes a control button assembly, the signal terminal of which is electrically connected to the automatic linear drive module and the detection component.

9. The automatic encoder calibration workbench according to claim 8, characterized in that, The control button assembly includes an emergency stop control button, a linear module power control button, a detection component power-on control button, and an automatic calibration start button.

10. The automatic encoder calibration workbench according to claim 9, characterized in that, The automatic encoder calibration workbench also includes a base, and the control button assembly and the automatic linear drive module are both connected to the base.

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