Non-contact differential capacitance angle measurement zero calibration and precision measurement device

Abstract

This invention provides a non-contact differential capacitive angle measurement zero-point calibration and accuracy measurement device. This device belongs to the category of non-contact angular displacement sensor accuracy measurement devices. A high-precision electric encoder can be used to achieve zero-point calibration and accuracy testing of low-precision differential capacitive angle measurement. The device is simple to use, has a reliable structure, and is controlled by a direct-drive motor. It can simultaneously achieve high-precision angle output across three axes at any working angle position without changing the shaft system components. The accuracy testing of non-contact differential capacitive angle measurement devices of different specifications can be achieved by changing the mounting angle measuring plate, demonstrating strong versatility.

Description

Technical Field

[0001] This application relates to the field of angle measurement technology, and in particular to a non-contact differential capacitive angle measurement zero-position calibration and accuracy measurement device. Background Technology

[0002] Differential capacitive angle measuring devices are angle measurement instruments. Unlike traditional single-angle encoders used in shaft systems, differential capacitive angle measuring devices are installed in pairs and, through signal processing, can achieve triaxial angle measurement. This type of angle measuring device does not occupy shaft space in its structural installation and has advantages such as simple structure, high reliability, low moment of inertia, and good linearity of angle output, making it promising for applications in angle measurement on photoelectric stabilization platforms. However, the accuracy of differential capacitive angle measuring devices is significantly affected by the manufacturing and installation processes. During the angle measuring process, it is particularly affected by the characteristics of the metal plating material on the measuring surface and the partitioning etching process. In actual installation, it is greatly affected by the operator's skill; even within the same batch of production, it is difficult to guarantee consistent accuracy. Currently, before formal equipment application, each pair of differential capacitive angle measuring devices needs to undergo zero-point calibration and accuracy testing.

[0003] Differential capacitive angle measurement is a non-contact angle measurement method, and its accuracy is greatly affected by the installation precision. Compared with traditional photoelectric encoders, it has lower accuracy. Summary of the Invention

[0004] The purpose of this invention is to use a high-precision capacitive encoder to detect the accuracy of differential displacement angle measurement. It can simultaneously realize three-axis angle measurement and calibration. The device has a high degree of automation and can achieve zero-position calibration and accuracy detection of differential displacement angle measurement of different specifications by changing some parts of the structure.

[0005] This invention provides a non-contact differential capacitance angle measurement zero-position calibration and accuracy measurement device, the device comprising:

[0006] The base 1 includes a base plate for placing on a horizontal surface and two side plates perpendicular to the base plate and respectively disposed at both ends of the base plate;

[0007] Three sets of shaft systems are set on the base. The three sets of shaft systems include a pitch shaft system group 5, a roll shaft system group 4 and an azimuth shaft system group 6, which are nested in sequence. Each set of shaft systems includes a corresponding motor and an electric encoder, which are used to control the motion angle and angle output of the corresponding shaft system.

[0008] Two fixed pole plates 10 are respectively disposed at the two right angles formed by the two side plates and the bottom plate of the base;

[0009] The moving pole mounting arm 11 has the three sets of shafts fixedly connected to its top end, and the two arms at the bottom end extend to the two fixed pole fixing plates 10 respectively, and two moving pole fixing plates 3 are provided corresponding to the two angle measuring fixed pole fixing plates 10. The three sets of shafts can drive the moving pole fixing plates 3 to move relative to the fixed pole fixing plates 10 through the moving pole mounting arm 11.

[0010] The fixed pole 201 of the differential capacitive angle measuring 2 can be fixedly connected to the fixed pole fixing plate 10, and the moving pole 202 can be fixedly connected to the moving pole fixing plate 3.

[0011] In some embodiments, the device further includes a pitch ring frame 8, which is disposed inside the top ends of the two side plates;

[0012] The pitch axis assembly 5 is located between the top ends of the two side plates and the pitch ring frame 8, and can rotate in the pitch axis, thereby driving the moving pole mounting arm 11 to rotate in the pitch axis.

[0013] In some embodiments, the device further includes an orientation seat 9, which is disposed on the inner side of the pitch ring frame 8 perpendicular to the extending direction of the base;

[0014] The roll axis assembly 4 is located between the pitch ring frame 8 and the azimuth seat 9, and can rotate in the roll axis, thereby driving the moving pole mounting arm 11 to rotate in the roll axis.

[0015] In some embodiments, the device further includes an azimuth axis 13, which is perpendicular to the pitch ring 8 and the azimuth seat 9;

[0016] The azimuth axis system 6 is disposed between the azimuth seat 9 and the azimuth axis 13, and can rotate in the azimuth axis, thereby driving the moving pole mounting arm 11 to rotate in the in-position axis.

[0017] In some embodiments, the top end of the moving pole mounting arm 11 is fixedly connected to the azimuth shaft 13.

[0018] In some embodiments, the pitch axis assembly 5 includes a pitch motor 501 and a pitch encoder 502. The pitch motor 501 and the pitch encoder 502 are disposed between the top ends of the two side plates and the pitch ring frame 8. The pitch motor driver 503 mounted on the pitch ring frame 8 controls the movement angle of the pitch motor 501 and can output the pitch angle of the pitch motor 501 at this time.

[0019] In some embodiments, the roll axis assembly 4 includes a roll motor 401 and a roll encoder 402. The roll motor 401 and the roll encoder 402 are disposed between the pitch ring frame 8 and the azimuth seat 9. The roll motor driver 403 mounted on the pitch ring frame 8 controls the motion angle of the roll motor 401 and can output the roll angle of the roll motor 401 at this time.

[0020] In some embodiments, the azimuth axis system group 6 includes an azimuth motor 601 and an azimuth encoder 602. The azimuth motor 601 and the azimuth encoder 602 are disposed between the azimuth base 9 and the azimuth axis 13. The azimuth motor driver 603, which is mounted on the pitch ring frame 8, controls the motion angle of the azimuth motor 601 and can output the azimuth angle of the azimuth motor 601 at this time.

[0021] In some embodiments, the angle measuring pole locator 201 can be fixedly connected to the pole locator fixing plate 10, including:

[0022] The angle measuring pole locator 201 is positioned by the cylindrical pin 7 and the pole fixing plate 10.

[0023] In some embodiments, the two fixed pole fixing plates 10 are respectively disposed at two right angles formed by the two side plates of the base and the bottom plate, including: the fixed pole fixing plates 10 are disposed at a 45° angle relative to the two side plates of the base and the bottom plate;

[0024] The two arms at the bottom of the moving pole mounting arm 11 are perpendicular to each other.

[0025] This invention starts with detecting the accuracy of differential capacitive angle measurement. It utilizes a high-precision capacitive encoder mounted on three axes to perform zero-position calibration and accuracy testing of the differential capacitive angle measurement, thus realizing the measurement and calibration of differential capacitive angle measurement accuracy. Furthermore, in actual operation, the device can quickly achieve zero-position calibration and accuracy measurement of angle measurement for different specifications by changing parts.

[0026] The present invention relates to a non-contact differential capacitive angle measurement zero-position calibration and accuracy measurement device, belonging to the category of non-contact angular displacement sensor accuracy measurement devices. A high-precision electric encoder can be used to achieve zero-position calibration and accuracy testing of low-precision differential capacitive angle measurement. This device is simple to use, has a reliable structure, and is controlled by a direct-drive motor. It can simultaneously achieve high-precision angle output across three axes at any working angle position without changing the shaft system components. The accuracy testing of non-contact differential capacitive angle measurement of different specifications can be achieved by changing the mounting angle measuring plate, demonstrating strong versatility. Attached Figure Description

[0027] The accompanying drawings illustrate, by way of example and not limitation, the various embodiments discussed herein.

[0028] Figure 1 This is a schematic diagram of a differential capacitance angle zero-position calibration and accuracy measurement device according to an embodiment of the present invention;

[0029] Figure 2 This is a schematic diagram of the differential capacitor angle measurement and polarity determination installation according to an embodiment of the present invention;

[0030] Figure 3 This is a schematic diagram of the front cross section of the differential capacitance angle zero-position calibration and accuracy measurement device according to an embodiment of the present invention;

[0031] Figure 4 This is a schematic cross-sectional view of the differential capacitance angle zero-position calibration and accuracy measurement device according to an embodiment of the present invention;

[0032] Figure 5 This is a schematic diagram of the vertical cross-section of the differential capacitance angle zero-position calibration and accuracy measurement device according to an embodiment of the present invention.

[0033] Symbol explanation:

[0034] 1-Base; 2-Differential capacitor angle measuring; 3-Moving pole fixing plate; 4-Roll axis assembly; 5-Pitch axis assembly; 6-Azimuth axis assembly; 7-Positioning pin; 8-Pitch ring frame; 9-Azimuth seat; 10-Fixed pole fixing plate; 11-Moving pole mounting arm; 13-Azimuth axis; 201-Angle measuring fixed pole; 202-Angle measuring moving pole; 401-Roll motor; 402-Roll electric encoder; 403-Roll motor driver; 501-Pitch motor; 502-Pitch electric encoder; 503-Pitch motor driver; 601-Azimuth motor; 602-Azimuth electric encoder; 603-Azimuth motor driver. Detailed Implementation

[0035] In order to gain a more detailed understanding of the features and technical content of the embodiments of this application, the implementation of the embodiments of this application will be described in detail below with reference to the accompanying drawings. The accompanying drawings are for reference and illustration only and are not intended to limit the embodiments of this application.

[0036] In the embodiments described in this application, it should be noted that, unless otherwise stated and limited, the term "connection" should be interpreted broadly. For example, it can be an electrical connection, or a connection between two internal components. It can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above term according to the specific circumstances.

[0037] It should be noted that the terms "first," "second," and "third" used in the embodiments of this application are merely used to distinguish similar objects and do not represent a specific ordering of objects. It is understood that "first," "second," and "third" can be interchanged in a specific order or sequence where permitted. It should be understood that the objects distinguished by "first," "second," and "third" can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in an order other than those illustrated or described herein.

[0038] The following is in conjunction with the appendix Figures 1 to 5 The embodiments of the present invention will be described in detail below.

[0039] This invention provides a non-contact differential capacitance angle zero-position calibration and accuracy measurement device, such as... Figures 1 to 5 As shown, the device includes:

[0040] The base 1 includes a base plate for placing on a horizontal surface and two side plates perpendicular to the base plate and respectively disposed at both ends of the base plate.

[0041] Three sets of axes are mounted on the base. These three sets of axes include a pitch axis group 5, a roll axis group 4, and an azimuth axis group 6, which are nested together in sequence. Each set of axes includes a corresponding motor and an electric encoder, used to control the motion angle and angle output of the corresponding axis. The rotation axes of the three axes are orthogonal to each other and nested together to achieve three-axis rotational freedom.

[0042] Two fixed pole plates 10 are respectively set at the two right angles formed by the two side plates and the bottom plate of the base.

[0043] like Figure 3 As shown, the moving pole mounting arm 11 has three sets of shafts fixedly connected to its top end, and two arms at the bottom end extend to two fixed pole fixing plates 10 respectively, and two moving pole fixing plates 3 are provided corresponding to the two angle measuring fixed pole fixing plates 10. The three sets of shafts can drive the moving pole fixing plates 3 to move relative to the fixed pole fixing plates 10 through the moving pole mounting arm 11.

[0044] like Figure 2 , Figure 3 and Figure 5 As shown, the fixed pole 201 of the differential capacitor angle measuring 2 can be fixedly connected to the fixed pole fixing plate 10, and the moving pole 202 can be fixedly connected to the moving pole fixing plate 3.

[0045] In some embodiments, such as Figure 1 As shown, the above-mentioned device also includes a pitch ring frame 8, which is disposed on the inner side of the top of the two side plates.

[0046] The pitch axis assembly 5 is located between the top of the two side plates and the pitch ring frame 8, and can rotate in the pitch axis, thereby driving the moving pole mounting arm 11 to rotate in the pitch axis.

[0047] In some embodiments, such as Figure 4 As shown, the above-mentioned device also includes an orientation seat 9, which is disposed on the inner side of the middle of the pitch ring frame 8 perpendicular to the extension direction of the base.

[0048] The roll axis assembly 4 is located between the pitch ring frame 8 and the azimuth seat 9, and can rotate in the roll axis, thereby driving the moving pole mounting arm 11 to rotate in the roll axis.

[0049] In some embodiments, such as Figure 4 As shown, the above-mentioned device also includes an azimuth axis 13, which is perpendicular to the pitch ring frame 8 and the azimuth seat 9.

[0050] The azimuth axis system 6 is located between the azimuth seat 9 and the azimuth axis 13, and can rotate in the azimuth axis, thereby driving the moving pole mounting arm 11 to rotate in the in-position axis.

[0051] In some embodiments, such as Figure 4 As shown, the top end of the moving pole mounting arm 11 is fixedly connected to the azimuth shaft 13.

[0052] In some embodiments, such as Figure 3 and Figure 5 As shown, the pitch axis assembly 5 includes a pitch motor 501 and a pitch encoder 502. The pitch motor 501 and the pitch encoder 502 are located between the top of the two side plates and the pitch ring frame 8. The pitch motor driver 503, which is installed on the pitch ring frame 8, controls the movement angle of the pitch motor 501 and can output the pitch angle of the pitch motor 501 at this time.

[0053] In some embodiments, such as Figure 4 and Figure 5 As shown, the roll axis assembly 4 includes a roll motor 401 and a roll encoder 402. The roll motor 401 and the roll encoder 402 are located between the pitch ring frame 8 and the azimuth seat 9. The roll motor driver 403, which is mounted on the pitch ring frame 8, controls the motion angle of the roll motor 401 and can output the roll angle of the roll motor 401 at this time.

[0054] In some embodiments, such as Figure 4 and Figure 5 As shown, the azimuth axis system group 6 includes an azimuth motor 601 and an azimuth encoder 602. The azimuth motor 601 and the azimuth encoder 602 are located between the azimuth base 9 and the azimuth axis 13. The azimuth motor driver 603, which is installed on the pitch ring frame 8, controls the motion angle of the azimuth motor 601 and can output the azimuth angle of the azimuth motor 601 at this time.

[0055] In some embodiments, such as Figure 2 and Figure 3As shown, the angle measuring pole locator 201 can be fixedly connected to the pole locator fixing plate 10, including:

[0056] The angle measuring pole locator 201 completes the position positioning through the cylindrical pin 7 and the pole fixing plate 10.

[0057] In some embodiments, such as Figure 1 and Figure 3 As shown, two fixed pole fixing plates 10 are respectively set at two right angles formed by the two side plates of the base and the bottom plate, including: the fixed pole fixing plates 10 are set at a 45° angle relative to the two side plates of the base and the bottom plate.

[0058] The two arms at the bottom of the moving pole mounting arm 11 are perpendicular to each other.

[0059] In some embodiments, the rotation axis of the fixed electrode mounting surface on the fixed electrode fixing plate 10 forms a 45° angle with both the base plate and the side plate. The mounting arm 11 is a V-shaped part. The included angle of the V-shape is a fixed angle, consistent with the installation angle of the capacitor angle measurement in the system; 90° is preferred for ease of calculation and installation. Connected to the azimuth axis system via bearings, rotational freedom in the azimuth direction can be achieved. The nested installation of the three axis systems allows for orthogonal three-axis rotational freedom between the moving electrode mounting arm and the fixed electrode mounting plate.

[0060] This invention provides a non-contact differential capacitance angle measurement zero-position calibration and accuracy measurement method based on the above-mentioned device, the method comprising the following steps:

[0061] Step 1: The roll encoder 402, pitch encoder 502, and azimuth encoder 602 use three angle encoders to locate the 0° rotation positions of the three shaft systems. Simultaneously, record the positions of the two pairs of capacitive angle measurements and calibrate them as the zero position of the capacitive angle measurement.

[0062] Step 2: The roll motor driver 403, pitch motor driver 503, and azimuth motor driver 603 drive the roll motor 401, pitch motor 501, and azimuth motor 601 respectively. The capacitive angle measuring device rotates along the three axes with the moving pole, thus achieving relative rotational motion with the stationary pole, causing a change in the capacitance value of the stationary pole. This can be calculated as the measured angle value of the capacitive angle measuring device.

[0063] Step 3: Within the angle range calculated by the combined capacitor angle measurement, the three-axis angle values ​​of the roll encoder 402, pitch encoder 502, and azimuth encoder 602 (high-precision angular displacement encoders) are simultaneously recorded and compared with the three-axis angle values ​​calculated by the combined capacitor angle measurement. The data is analyzed to obtain the relative error value, thus completing the accuracy measurement. The encoder in this embodiment uses a high-precision capacitor encoder.

[0064] The central idea of ​​this case is to use high-precision angles to calibrate low-precision angles, adopt the high-precision angles, and obtain the error value of the low-precision angles.

[0065] This invention starts with detecting the accuracy of differential capacitive angle measurement. It utilizes a high-precision capacitive encoder mounted on three axes to perform zero-position calibration and accuracy testing of the differential capacitive angle measurement, thus realizing the measurement and calibration of differential capacitive angle measurement accuracy. Furthermore, in actual operation, the device can quickly achieve zero-position calibration and accuracy measurement of angle measurement for different specifications by changing parts.

[0066] The present invention relates to a non-contact differential capacitive angle measurement zero-position calibration and accuracy measurement device, belonging to the category of non-contact angular displacement sensor accuracy measurement devices. A high-precision electric encoder can be used to achieve zero-position calibration and accuracy testing of low-precision differential capacitive angle measurement. This device is simple to use, has a reliable structure, and is controlled by a direct-drive motor. It can simultaneously achieve high-precision angle output across three axes at any working angle position without changing the shaft system components. The accuracy testing of non-contact differential capacitive angle measurement of different specifications can be achieved by changing the mounting angle measuring plate, demonstrating strong versatility.

[0067] This invention provides a non-contact differential capacitance angle zero-position calibration and accuracy measurement device, such as... Figure 1 As shown, the device includes:

[0068] The three-axis rotation mechanism includes three rotational axes for azimuth, pitch, and roll, with angles ranging from -5° to +5°. A direct-drive motor and its driver are nested within the ring frame.

[0069] The three-axis independent angle measuring device has three high-precision capacitive encoders installed in three nested rotary shaft systems.

[0070] The fixed and moving pole mounting bases for angle measurement are replaceable, allowing for the completion of zero-position calibration and accuracy measurement in the same device for non-contact differential capacitive angle measurement of different specifications.

[0071] Combination Figure 1 This is a structural layout diagram of a differential capacitor angle measurement zero-position calibration and accuracy measurement device. The entire device mainly includes a base 1 and a pitch axis group 5, a roll axis group 4 and an azimuth axis group 6 that are nested in sequence. Each axis group is equipped with a high-precision electric encoder, a direct drive motor and a driver.

[0072] Figure 2 The differential capacitive angle measuring system consists of two spherical electrodes: a fixed angle measuring electrode 201 and a moving angle measuring electrode 202. The fixed angle measuring electrode 201 is fixed to the fixed electrode mounting base 10 by a positioning pin. The surface of the moving angle measuring electrode 202 is divided into partitions with mutual insulation between the partitions. The rotation angle of the three-axis system can be calculated by measuring the capacitance of each partition between the moving electrode and the fixed electrode.

[0073] Specifically, the surface of the measuring angle electrode 202 is divided into four independent surfaces by a cross-shaped resistive coating, and the four surfaces are insulated from each other.

[0074] like Figure 1 As shown, the differential capacitance angle zero-position calibration and accuracy measurement device consists of three sets of rotating shaft systems.

[0075] like Figure 3 and Figure 5 As shown, a pitch motor and a pitch encoder are installed between the base and the pitch ring frame in the device to form a pitch axis system. The pitch motor driver installed on the pitch ring frame controls the motion angle of the pitch motor and can output the pitch angle of the device at this time.

[0076] like Figure 4 and Figure 5 As shown, a roll motor and a roll encoder, forming a roll axis system, are installed between the pitch ring frame and the azimuth base. The roll motor driver, mounted on the pitch ring frame, controls the roll motor's angle of motion and outputs the roll angle of the device at that moment. Similarly, an azimuth motor and an azimuth encoder, forming an azimuth axis system, are installed between the azimuth base and the azimuth axis. The azimuth motor driver, mounted on the pitch ring frame, controls the azimuth motor's angle of motion and outputs the azimuth angle of the device at that moment.

[0077] like Figure 2 and Figure 3 As shown, the differential capacitor angle measuring stationary pole is connected to the base via a stationary pole fixing plate, and the moving pole is connected to the moving pole mounting arm via a moving pole fixing plate. Finally, they are connected via an azimuth axis and an azimuth axis system. Relative motion between the moving and stationary poles can be achieved through a three-axis combined motion. The three-axis angles of the differential capacitor angle measuring system can be obtained through calculation.

[0078] In this embodiment of the invention, the high-precision capacitive encoder can be understood as a high-precision angular displacement sensor, including but not limited to capacitive encoders, time-grating encoders, optical encoders, and encoders. A resolution better than 10″ is preferred.

[0079] The technical solutions described in the embodiments of this application can be combined arbitrarily without conflict.

[0080] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A non-contact differential capacitance angle measurement zero-position calibration and accuracy measurement device, characterized in that, The device includes: The base (1) includes a base plate for placing on a horizontal surface and two side plates perpendicular to the base plate and respectively disposed at both ends of the base plate; Three sets of shaft systems are set on the base. The three sets of shaft systems include a pitch shaft system group (5), a roll shaft system group (4), and an azimuth shaft system group (6) that are nested in sequence. Each set of shaft systems includes a motor and an electric encoder that are set accordingly to control the motion angle and angle output of the corresponding shaft system. Two fixed pole plates (10) are respectively disposed at the two right angles formed by the two side plates and the bottom plate of the base; The moving pole mounting arm (11) is fixedly connected to the three sets of shafts at its top end, and the two arms at its bottom end extend to the two fixed pole fixing plates (10) respectively and are provided with two moving pole fixing plates (3) corresponding to the two fixed pole fixing plates (10). The three sets of shafts can drive the moving pole fixing plates (3) to move relative to the fixed pole fixing plates (10) through the moving pole mounting arm (11). The fixed pole (201) of the differential capacitive angle measuring (2) can be fixedly connected to the fixed pole fixing plate (10), and the moving pole (202) can be fixedly connected to the moving pole fixing plate (3).

2. The non-contact differential capacitance angle zero-position calibration and accuracy measurement device according to claim 1, characterized in that, The device also includes a pitch ring frame (8), which is disposed on the inner side of the top of the two side plates; The pitch axis assembly (5) is located between the top ends of the two side plates and the pitch ring frame (8), and can rotate in the pitch axis, thereby driving the moving pole mounting arm (11) to rotate in the pitch axis.

3. The non-contact differential capacitance angle zero-position calibration and accuracy measurement device according to claim 2, characterized in that, The device also includes an orientation seat (9), which is disposed on the inner side of the pitch ring frame (8) perpendicular to the extension direction of the base. The roll axis assembly (4) is located between the pitch ring frame (8) and the azimuth seat (9), and can rotate in the roll axis, thereby driving the moving pole mounting arm (11) to rotate in the roll axis.

4. The non-contact differential capacitance angle zero-position calibration and accuracy measurement device according to claim 3, characterized in that, The device also includes an azimuth axis (13), which is perpendicular to the pitch ring frame (8) and the azimuth seat (9). The azimuth axis system (6) is located between the azimuth seat (9) and the azimuth axis (13), and can rotate in the azimuth axis, thereby driving the moving pole mounting arm (11) to rotate in the in-situ axis.

5. The non-contact differential capacitance angle zero-position calibration and accuracy measurement device according to claim 4, characterized in that, The azimuth axis (13) is fixedly connected to the top of the moving pole mounting arm (11).

6. The non-contact differential capacitance angle zero-position calibration and accuracy measurement device according to claim 4, characterized in that, The pitch axis assembly (5) includes a pitch motor (501) and a pitch encoder (502). The pitch motor (501) and the pitch encoder (502) are located between the top of the two side plates and the pitch ring frame (8). The pitch motor driver (503) installed on the pitch ring frame (8) controls the movement angle of the pitch motor (501) and can output the pitch angle of the pitch motor (501) at this time.

7. The non-contact differential capacitance angle zero-position calibration and accuracy measurement device according to claim 4, characterized in that, The roll shaft assembly (4) includes a roll motor (401) and a roll encoder (402). The roll motor (401) and the roll encoder (402) are located between the pitch ring frame (8) and the azimuth seat (9). The roll motor driver (403) installed on the pitch ring frame (8) controls the motion angle of the roll motor (401) and can output the roll angle of the roll motor (401) at this time.

8. The non-contact differential capacitance angle zero-position calibration and accuracy measurement device according to claim 4, characterized in that, The azimuth axis system group (6) includes an azimuth motor (601) and an azimuth encoder (602). The azimuth motor (601) and the azimuth encoder (602) are located between the azimuth base (9) and the azimuth axis (13). The azimuth motor driver (603) installed on the pitch ring frame (8) controls the motion angle of the azimuth motor (601) and can output the azimuth angle of the azimuth motor (601) at this time.

9. The non-contact differential capacitance angle zero-position calibration and accuracy measurement device according to claim 1, characterized in that, The angle measuring pole locator (201) can be fixedly connected to the pole locator fixing plate (10), including: The angle measuring pole locator (201) completes the position positioning with the pole fixing plate (10) through the cylindrical pin (7).

10. The non-contact differential capacitance angle zero-position calibration and accuracy measurement device according to claim 1, characterized in that, The two fixed pole fixing plates (10) are respectively disposed at the two right angles formed by the two side plates of the base and the bottom plate, including: the fixed pole fixing plates (10) are disposed at a 45° angle relative to the two side plates of the base and the bottom plate; The two arms at the bottom of the moving pole mounting arm (11) are perpendicular to each other.

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