Angle measuring device, measuring device, motor assembly and measuring system

Abstract

The invention provides an angle measuring device, a measuring device, a motor assembly and a measuring system, the angle measuring device comprises a trigger structure, a first sensor module and a second sensor module, and a first code channel and a second code channel of the trigger structure are oppositely arranged; the first code channel comprises a first trigger area capable of generating a magnetic field, the second code channel comprises a second trigger area capable of generating a magnetic field, and an anti-interference part used for reducing or eliminating interference between the magnetic field of the first trigger area and the magnetic field of the second trigger area is arranged between the first trigger area and the second trigger area; the first sensor module is used for detecting the magnetic field of the first trigger area and generating a first detection signal, and the first detection signal is used for determining the rotation angle of the first code channel; the second sensor module is used for detecting the magnetic field of the second trigger area and generating a second detection signal, and the second detection signal is used for determining the position of a preset point of the second trigger area. Mutual interference of magnetic field intensity between code channels can be reduced or eliminated, and the detection precision is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of angle measurement, and in particular to an angle measuring device, a measuring device, a motor component and a measuring system. Background Art

[0002] Magnetic measuring devices are used to detect the rotation angle or movement distance of moving parts. The detection accuracy of magnetic measuring devices directly affects the performance of moving parts, and then affects the performance of the entire measurement system. However, the magnetic field strength between the code channels of magnetic measuring devices is prone to mutual interference, resulting in reduced detection accuracy. Summary of the invention

[0003] The present invention provides an angle measuring device, a measuring device, a motor assembly and a measuring system, which are intended to reduce or eliminate the mutual interference of magnetic field strength between code channels and improve detection accuracy.

[0004] An embodiment of the present invention provides an angle measuring device, comprising:

[0005] A trigger structure, the trigger structure comprising a first code channel and a second code channel, the first code channel and the second code channel are arranged opposite to each other; the first code channel comprises a first trigger area capable of generating a magnetic field, the second code channel comprises a second trigger area capable of generating a magnetic field, and an anti-interference portion for reducing or eliminating interference between the magnetic field of the first trigger area and the magnetic field of the second trigger area is provided between the first trigger area and the second trigger area;

[0006] A first sensor module, arranged corresponding to the first code channel, for detecting the magnetic field of the first triggering area and generating a first detection signal, wherein the first detection signal is used to determine the rotation angle of the first code channel;

[0007] The second sensor module is arranged corresponding to the second code channel, and is used to detect the magnetic field of the second triggering area and generate a second detection signal, and the second detection signal is used to determine the position of the preset point of the second triggering area.

[0008] Another embodiment of the present invention provides an angle measuring device, comprising:

[0009] A trigger structure capable of generating a magnetic field, the trigger structure comprising a first code channel and a second code channel, the first code channel and the second code channel are arranged opposite to each other, the first code channel comprises a first trigger area capable of generating a magnetic field, and the second code channel comprises a second trigger area capable of passing a light pulse or blocking a light pulse;

[0010] A first sensor module, arranged corresponding to the first code channel, for detecting the magnetic field of the first triggering area and generating a first detection signal, wherein the first detection signal is used to determine the rotation angle of the first code channel;

[0011] The second sensor module is arranged corresponding to the second code channel, and is used to detect the signal of the light pulse passing through the second trigger area or the signal of the light pulse being blocked by the second trigger area to generate a second detection signal, and the second detection signal is used to determine the position of the preset point of the second trigger area.

[0012] Another embodiment of the present invention provides a measuring device, comprising:

[0013] A trigger structure, the trigger structure comprising a first code channel and a second code channel, the first code channel and the second code channel are arranged opposite to each other; the first code channel comprises a first trigger area capable of generating a magnetic field, the second code channel comprises a second trigger area capable of generating a magnetic field, and an anti-interference portion for reducing or eliminating interference between the magnetic field of the first trigger area and the magnetic field of the second trigger area is provided between the first trigger area and the second trigger area;

[0014] a first sensor module, arranged corresponding to the first code channel, for detecting the magnetic field of the first triggering area and generating a first detection signal, wherein the first detection signal is used to determine the motion information of the first code channel;

[0015] The second sensor module is arranged corresponding to the second code channel, and is used to detect the magnetic field of the second triggering area and generate a second detection signal, and the second detection signal is used to determine the position of the preset point of the second triggering area.

[0016] Another embodiment of the present invention further provides a motor assembly, comprising:

[0017] A motor comprising a fixed part and a moving part, wherein the moving part is capable of rotating relative to the fixed part; and

[0018] An angle measuring device, the angle measuring device comprising:

[0019] A trigger structure is configured to rotate synchronously with the moving part, and the trigger structure is provided with an accommodating space for accommodating at least part of the motor, so that at least part of the motor is located inside the trigger structure in a direction perpendicular to the rotation axis of the motor; the trigger structure includes a first code track and a second code track, the first code track is arranged opposite to the second code track; the first code track includes a first trigger area capable of generating a magnetic field, and the second code track includes a second trigger area capable of generating a magnetic field;

[0020] A first sensor module, arranged corresponding to the first code channel, for detecting the magnetic field of the first triggering area and generating a first detection signal, wherein the first detection signal is used to determine the rotation angle of the moving part;

[0021] The second sensor module is arranged corresponding to the second code channel, and is used to detect the magnetic field of the second trigger area and generate a second detection signal. The second detection signal is used to determine the position of a preset point of the second trigger area, and the position of the preset point is used to represent the zero position of the rotation of the moving part.

[0022] Another embodiment of the present invention provides a measurement system, comprising:

[0023] Moving elements; and

[0024] The angle measuring device mentioned above, or the measuring device mentioned above, or the motor assembly mentioned above, the motor of the motor assembly is used to drive the moving element to move.

[0025] The angle measuring device, measuring device, motor assembly and measuring system provided by the embodiments of the present invention have an anti-interference part between the first trigger area and the second trigger area, and the anti-interference part is used to reduce or eliminate the interference between the magnetic field of the first trigger area and the magnetic field of the second trigger area, thereby reducing or eliminating the mutual interference of the magnetic field strength between the first code channel and the second code channel, improving the detection accuracy of the first sensor module and the second sensor module, and further improving the measurement accuracy of the angle measuring device.

[0026] It should be understood that the above general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure of the embodiments of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying any creative work.

[0028] Figure 1 is a schematic diagram of an angle measuring device provided by an embodiment of the present invention;

[0029] FIG. 2(A) is a schematic diagram of a trigger structure provided in an embodiment of the present invention;

[0030] FIG2(B) is a schematic diagram of an angle measuring device provided by an embodiment of the present invention;

[0031] Figure 3 is a schematic diagram of an angle measuring device provided by an embodiment of the present invention;

[0032] Figure 4 is a structural diagram of a trigger structure provided by an embodiment of the present invention;

[0033] Figure 5is a schematic diagram of an angle measuring device provided by an embodiment of the present invention;

[0034] Figure 6 is a structural schematic diagram of a motor assembly provided by an embodiment of the present invention;

[0035] Figure 7 It is a schematic diagram of the structure of a structural member provided by an embodiment of the present invention.

[0036] Description of reference numerals:

[0037] 101. Motor assembly;

[0038] 100. Angle measuring device;

[0039] 10. trigger structure; 11. first code channel; 111. first trigger area; 1111. third magnetic pole; 1112. fourth magnetic pole; 112. first surface; 12. second code channel; 121. second trigger area; 1211. first magnetic pole; 1212. second magnetic pole; 122. second surface; 13. anti-interference part; 14. accommodation space;

[0040] 20. First sensor module; 30. Second sensor module; 40. Measurement circuit board;

[0041] 200, motor; 201, fixed part; 202, moving part;

[0042] 300, structural part; 301, aperture; 302, matte layer; 303, electroplating layer; 304, laser carving layer. DETAILED DESCRIPTION

[0043] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0044] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0045] It should also be understood that the terms used in the present specification are only for the purpose of describing specific embodiments and are not intended to limit the present invention. As used in the present specification and the appended claims, the singular forms "a", "an" and "the" are intended to include plural forms unless the context clearly indicates otherwise.

[0046] It should be further understood that the term "and / or" used in the present description and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0047] Magnetic measuring devices are used to detect the rotation angle, deflection information or reciprocating motion information of moving parts. For example, magnetic angle measuring devices are used to measure the rotation angle or deflection information of moving parts. However, the magnetic field strengths between different code channels of magnetic angle measuring devices are prone to mutual interference, resulting in reduced detection accuracy.

[0048] To this end, embodiments of the present invention provide an angle measurement device, a measurement device, a motor assembly, and a measurement system to reduce or eliminate mutual interference of magnetic field strengths between code channels and improve detection accuracy.

[0049] Some embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0050] See also Figure 12(A), an embodiment of the present invention provides an angle measuring device 100, including a trigger structure 10, a first sensor module 20 and a second sensor module 30, wherein the trigger structure 10 includes a first code channel 11 and a second code channel 12, wherein the first code channel 11 and the second code channel 12 are arranged opposite to each other, wherein the first code channel 11 includes a first triggering area 111 capable of generating a magnetic field, and the second code channel 12 includes a second triggering area 121 capable of generating a magnetic field. An anti-interference portion 13 is provided between the first triggering area 111 and the second triggering area 121, and the anti-interference portion 13 is used to reduce or eliminate interference between the magnetic field of the first triggering area 111 and the magnetic field of the second triggering area 121. The first sensor module 20 is arranged corresponding to the first code channel 11; the first sensor module 20 is used to detect the magnetic field of the first triggering area 111 and generate a first detection signal, and the first detection signal is used to determine the rotation angle of the first code channel 11. The second sensor module 30 is arranged corresponding to the second code channel 12. The second sensor module 30 is used to detect the magnetic field of the second triggering area 121 and generate a second detection signal. The second detection signal is used to determine the position of the preset point of the second triggering area 121 .

[0051] In the angle measuring device 100 of the above embodiment, an anti-interference part 13 is provided between the first triggering area 111 and the second triggering area 121. The anti-interference part 13 is used to reduce or eliminate the interference between the magnetic field of the first triggering area 111 and the magnetic field of the second triggering area 121, thereby reducing or eliminating the mutual interference of the magnetic field strength between the first code channel 11 and the second code channel 12, improving the detection accuracy of the first sensor module 20 and the second sensor module 30, and further improving the measurement accuracy of the angle measuring device 100.

[0052] In addition, compared with the photoelectric angle detection structure, the angle measuring device 100 of this embodiment has a first sensor module 20 for detecting the magnetic field of the first trigger area 111 and generating a first detection signal, and the first detection signal is used to determine the rotation angle of the first code channel 11; the second sensor module 30 is used to detect the magnetic field of the second trigger area 121 and generate a second detection signal, and the second detection signal is used to determine the position of the preset point of the second trigger area 121. Therefore, even if the angle measuring device 100 is under harsh working conditions such as high and low temperatures, it can have high measurement accuracy and resolution, and has a simple structure, compact structure, and low cost.

[0053] 2(A), in some embodiments, the first code track 11 and the second code track 12 are arranged opposite to each other in a plane perpendicular to the axis of the trigger structure 10. The trigger structure 10 can rotate around the axis.

[0054] 2(A), in some embodiments, the first code channel 11 and the second code channel 12 are arranged opposite to each other along the radial direction of the trigger structure 10. For example, the radius of the first code channel 11 may be greater than the radius of the second code channel 12. For example, the radius of the first code channel 11 may also be smaller than the radius of the second code channel 12.

[0055] Please refer to FIG. 2(B). In some embodiments, the first code channel 11 and the second code channel 12 are relatively arranged along the axis of the trigger structure 10. In some embodiments, the first code channel 11 and the second code channel 12 are relatively arranged along a direction parallel to the axis of the trigger structure 10. Exemplarily, the radius of the first code channel 11 may be greater than or equal to the radius of the second code channel 12, and the radius of the first code channel 11 may also be less than the radius of the second code channel 12. Exemplarily, the first code channel 11 and the second code channel 12 may be respectively connected to the moving part 202; or; the first code channel 11 and the second code channel 12 may be respectively connected to an intermediate member, which is connected to the moving part 202.

[0056] Exemplarily, the axis of the trigger structure 10 is shown as the dotted line in FIG. 2(B) .

[0057] Please refer to FIG. 2(B), illustratively, the first code channel 11 and the second code channel 12 are coaxially arranged.

[0058] 2(B), in some embodiments, the first code track 11 and the second code track 12 are arranged relative to each other along the axis of the trigger structure 10 to form an anti-interference portion 13. In some embodiments, the anti-interference portion 13 includes a non-hollow structure made of non-magnetic material, and the first code track 11, the anti-interference portion 13 and the second code track 13 are arranged in sequence.

[0059] In some embodiments, the position of the preset point is used to characterize the zero position of the rotation of the moving part 202. The moving part 202 is used to rotate synchronously with the trigger structure 10. The second sensor module 30 detects the position of the preset point of the second trigger area 121, and the zero position of the moving part 202 can be detected. The position of the preset point can be any suitable position in the second trigger area 121. It can be understood that the moving part 202 has a zero position, and the position of the preset point corresponds to the zero position of the moving part 202. Exemplarily, according to the first detection signal generated by the first sensor module 20 and the second detection signal generated by the second sensor 30, the rotation angle of the first code channel 11 or the trigger structure 10 can be determined, thereby determining the rotation angle of the moving part 202.

[0060] It is understandable that the zero position of the moving part 202 is also referred to as the position of the zero point, and the zero position can be set by default or by the user according to actual needs. The zero position of the moving part 202 is used to represent the position where the rotation angle of the moving part 202 is started to be calculated. Figure 6 When the motor 200 of the parent device is started, the position of the preset point corresponds to the position of the second sensor module 30. In this case, the parent device has found the zero position of the moving part 202 and can start to calculate the rotation angle of the moving part 202. Exemplarily, when the parent device is started, the position of the preset point does not correspond to the position of the second sensor module 30. In this case, the moving part 202 idles for a predetermined time to find the position of the preset point that matches the second sensor module 30, thereby determining the zero position of the moving part 202.

[0061] Exemplarily, the moving component 202 may be a part of the structure of the motor 200; or, the moving component 202 may also be any other component that can rotate, deflect, or reciprocate.

[0062] In some embodiments, the magnetic field strength of the second triggering area 121 is greater than the magnetic field strength of the area other than the second triggering area 121 in the second code channel 12, so that the second sensor module 30 can sensitively and accurately detect the magnetic field of the second triggering area 121, thereby accurately determining the position of the preset point of the second triggering area 121. Exemplarily, the magnetic field strength of the area other than the second triggering area 121 is greater than or equal to zero, and the magnetic field strength of the second triggering area 121 is greater than the magnetic field strength of the area other than the second triggering area 121 in the second code channel 12.

[0063] In some embodiments, the area other than the second trigger area 121 in the second code track 12 is a non-magnetic area. In other words, the magnetic field strength of the area other than the second trigger area 121 is equal to zero, and the area other than the second trigger area 121 does not generate a magnetic field. For the second code track 12 of this structure, only the second trigger area 121 needs to be magnetized, and there is no need to magnetize the area other than the second trigger area 121 in the second code track 12, thereby improving the magnetization efficiency and reducing the magnetization power consumption. Exemplarily, the circumferential length of the non-magnetic area of ​​the second code track 12 is greater than the circumferential length of the second trigger area 121. Exemplarily, the circumferential length or arc length of the second trigger area 121 is less than half of the circumference of the second code track 12.

[0064] Please refer to FIG. 2 (A). In some embodiments, the second triggering area 121 includes a first magnetic pole 1211 and two second magnetic poles 1212. The polarities of the first magnetic pole 1211 and the second magnetic pole 1212 are opposite. One of the second magnetic poles 1212, the first magnetic pole 1211 and the other second magnetic pole 1212 are sequentially arranged along the circumference of the second code channel 12 to improve the signal-to-noise ratio and the signal concentration, which is conducive to accurately determining the position of the preset point of the second triggering area 121. Exemplarily, the first magnetic pole 1211 is an N pole and the second magnetic pole 1212 is an S pole; or, the first magnetic pole 1211 is an S pole and the second magnetic pole 1212 is an N pole. In other embodiments, the second triggering area 121 may also be any other suitable structure, such as the second triggering area 121 only includes one first magnetic pole 1211 or one second magnetic pole 1212.

[0065] In some embodiments, the first triggering region 111 is a continuous magnetic region, which has a compact structure and can improve the measurement accuracy of the angle measurement device 100 .

[0066] Please refer to FIG. 2(A). In some embodiments, the first trigger region 111 includes a third magnetic pole 1111 and a fourth magnetic pole 1112. The third magnetic pole 1111 and the fourth magnetic pole 1112 have opposite polarities. The third magnetic pole 1111 and the fourth magnetic pole 1112 are arranged alternately along the circumference of the first code track 11. With this structure, the trigger structure 10 occupies a small space and the angle measuring device 100 has a compact structure. In addition, the first sensor module 20 can accurately determine the rotation angle of the first code track 11, thereby improving the measurement accuracy of the angle measuring device 100. Exemplarily, one of the third magnetic pole 1111 and the fourth magnetic pole 1112 is an N pole and the other is an S pole. In other embodiments, the first trigger region 111 is a continuous magnetic region, and the third magnetic pole 1111 and the fourth magnetic pole 1112 are arranged opposite to each other along the radial direction of the first code track 11 or the trigger structure 10.

[0067] Please refer to Figure 2 (A). In some embodiments, the third magnetic pole 1111 and the fourth magnetic pole 1112 are in contact with each other to arrange as many third magnetic poles 1111 and fourth magnetic poles 1112 as possible in a limited space, thereby improving the detection accuracy of the first sensor 20 and further improving the measurement accuracy of the angle measurement device 100.

[0068] A third magnetic pole 1111 and a fourth magnetic pole 1112 form a magnetic pole pair. The number of pole pairs of the first trigger zone 111 can be designed according to actual needs. The number of pole pairs of the first trigger zone 111 is equal to half of the sum of the number of third magnetic poles 1111 and the number of fourth magnetic poles 1112. The more pole pairs there are, the higher the measurement accuracy. Exemplarily, the number of pole pairs of the first trigger zone 111 ranges from 2 to 60 pairs, for example, the number of pole pairs of the first trigger zone 111 is 2 pairs, 20 pairs, 32 pairs, 60 pairs or any other suitable number between 2 and 60 pairs. The first trigger zone 111 adopts a multi-pole pair design, which can improve the resolution of the angle measuring device 100 and improve the measurement accuracy of the angle measuring device 100.

[0069] It can be understood that the magnetization methods of the first triggering area 111 and the second triggering area 121 can include at least one of the following: axial magnetization, radial magnetization, etc.

[0070] Please refer to FIG. 2(A) . In some embodiments, the first triggering area 111 and the second triggering area 121 are spaced apart from each other, so that at least a portion of the anti-interference portion 13 is formed between the first triggering area 111 and the second triggering area 121 .

[0071] Referring to FIG. 2(A), in some embodiments, the anti-interference portion 13 includes a non-magnetic region between the first triggering region 111 and the second triggering region 121, so that the first triggering region 111 and the second triggering region 121 are spaced apart, thereby reducing or eliminating interference between the magnetic field of the first triggering region 111 and the magnetic field of the second triggering region 121, thereby improving the measurement accuracy of the angle measurement device 100. The non-magnetic region of the anti-interference portion 13 may include at least one of the following: a non-hollow structure made of non-magnetic material; a hollow structure, etc.

[0072] See also Figure 1 In some embodiments, the first code channel 11 has a first surface 112 disposed corresponding to the first sensor module 20 , and the second code channel 12 has a second surface 122 disposed corresponding to the second sensor module 30 .

[0073] Exemplarily, the surface of the first triggering area 111 facing the first sensor module 20 is the first surface 112, and the surface of the second triggering area 121 facing the second sensor module 30 is the second surface 122. Exemplarily, the surface of the first triggering area 111 closest to the first sensor module 20 is the first surface 112, and the surface of the second triggering area 121 closest to the second sensor module 30 is the second surface 122.

[0074] Please refer to FIG. 2(A). In some embodiments, the distance between the side of the first triggering area 111 close to the second code channel 12 and the axis of the triggering structure 10 is m1, and the distance between the side of the second triggering area 121 close to the first code channel 11 and the axis of the triggering structure 10 is m2, and the triggering structure 10 can rotate around the axis. Among them, m1 is greater than m2 to reduce or eliminate the interference between the magnetic field of the first triggering area 111 and the magnetic field of the second triggering area 121. It can be understood that the first triggering area 111 and the second triggering area 121 are arranged radially spaced along the triggering structure 10, and the anti-interference part 13 includes a radial spacing area between the first triggering area 111 and the second triggering area 121; the radial spacing area can be a non-hollow structure made of non-magnetic material, or a hollow structure, etc.

[0075] See also Figure 3 In some embodiments, the first code channel 11 has a first surface 112 corresponding to the first sensor module 20, and the second code channel 12 has a second surface 122 corresponding to the second sensor module 30. The projection of the first surface 112 along the axis of the trigger structure 10 and the projection of the second surface 122 along the axis of the trigger structure 10 are arranged at intervals, and the trigger structure 10 can rotate around the axis to reduce or eliminate the interference between the magnetic field of the first trigger area 111 and the magnetic field of the second trigger area 121. Exemplarily, the projection of the first surface 112 along the axis of the trigger structure 10 and the projection of the second surface 122 along the axis of the trigger structure 10 are arranged at intervals to form at least part of the anti-interference portion 13.

[0076] See also Figure 3 In some embodiments, the projections of the first sensor module 20, the first surface 112 and the second surface 122 along the axis of the trigger structure 10 are sequentially arranged at intervals to reduce or eliminate the interference between the magnetic field of the first trigger area 111 and the magnetic field of the second trigger area 121; and the first sensor module 20 can reliably detect the magnetic field of the first trigger area 111, and the second sensor module 30 can reliably detect the magnetic field of the second trigger area 121. It can be understood that when the package height of the second sensor module 30 is greater than the package height of the first sensor module 20, since the projections of the first sensor module 20, the first surface 112 and the second surface 122 along the axis of the trigger structure 10 are sequentially arranged at intervals, by setting the relative positions of the first surface 112 and the second surface 122 relative to the first sensor module 20, the distance between the second surface 122 and the first sensor module 20 is adapted to adapt to the different package heights of the first sensor module 20 and the second sensor module 30, without considering the problem of difficulty in controlling the magnetic measurement interval due to the inconsistent package heights of the first sensor module 20 and the second sensor module 30.

[0077] In some embodiments, the anti-interference part 13 includes an anti-interference magnet (not shown) or an anti-interference magnetic conductive element (not shown) that can generate an anti-interference magnetic field. The anti-interference magnetic field is opposite to the interference magnetic field (the interference magnetic field includes the magnetic field of the first trigger zone 111 or the magnetic field of the second trigger zone 121). By superimposing the anti-interference magnetic field and the interference magnetic field, the interference between the magnetic field of the first trigger zone 111 and the magnetic field of the second trigger zone 121 can be reduced or eliminated, thereby reducing the measurement error of at least one of the first sensor module 20 and the second sensor module 30, thereby improving the measurement accuracy of the angle measurement device 100.

[0078] In some embodiments, the first triggering area 111 includes a first magnetic conductive area or a first magnetic area. For example, the first magnetic conductive area can generate a magnetic field when powered. For example, the first magnetic conductive area can also be magnetized by a magnetic element to generate a magnetic field. For example, the first magnetic area includes a magnet.

[0079] In some embodiments, the second triggering area 121 includes a second magnetic conductive area or a second magnetic area. For example, the second magnetic conductive area can generate a magnetic field when powered. For example, the second magnetic conductive area can also be magnetized by a magnetic element to generate a magnetic field. For example, the second magnetic area includes a magnet.

[0080] In some embodiments, the first code channel 11 includes a first carrier (not shown), the second code channel 12 includes a second carrier (not shown), the first trigger area 111 is provided on the first carrier, the second trigger area 121 is provided on the second carrier, and the first carrier is connected to the second carrier. The first carrier and the second carrier are both made of non-magnetic materials. Exemplarily, the first carrier and the second carrier are integrally connected or separately provided.

[0081] The trigger structure 10 can be designed into any suitable shape according to actual needs. For example, referring to FIG. 2(A), the shape of the trigger structure 10 includes a closed circle or ring; or Figure 4 The shape of the trigger structure 10 includes a fan ring or a fan shape, etc. Exemplarily, the center of the first code track 11 coincides with the center of the second code track 12 .

[0082] Please refer to Figure 2(A) or Figure 4 For example, the shape of the trigger structure 10 includes a ring or a fan ring, and the trigger structure 10 is provided with a receiving space 14, and the receiving space 14 is used to accommodate at least part of the moving part 202 (see Figure 6), so that the moving part 202 is located inside the trigger structure 10 in a direction perpendicular to the rotation axis of the moving part 202, so that the weight of the trigger structure 10 can be reduced, and the space occupied by the trigger structure 10 and the moving part 202 after assembly can be saved, so that the structure after the trigger structure 10 and the moving part 202 are assembled is more compact, which is conducive to the miniaturization and lightweight design of the product. The moving part 202 can be a part of the motor 200, or other rotating, deflecting or reciprocating parts.

[0083] In some embodiments, the first sensor module 20 includes at least one of the following: a magnetic grid sensor, a magnetoresistive sensor, a giant magneto-impedance sensor, a Hall sensor, etc.

[0084] In some embodiments, the second sensor module 30 includes at least one of the following: a Hall sensor, a reed switch, a magnetic switch, etc.

[0085] In some embodiments, the second sensor module 30 includes two Hall sensors (not shown), the positions of the two Hall sensors are different, and the two Hall sensors are used to detect the magnetic field of the second trigger area 121 and generate a second detection signal. In this way, even if one of the Hall sensors fails, the other Hall sensor can detect the magnetic field of the second trigger area 121 and generate a second detection signal, which is conducive to improving the functional safety of the second sensor module 30, thereby improving the measurement reliability of the angle measurement device 100. It can be understood that the positions of the two Hall sensors are different, and the magnetic field strengths of the second trigger area 121 detected by the two Hall sensors are different.

[0086] See also Figure 5 In some embodiments, the angle measuring device 100 further includes a measuring circuit board 40, and the first sensor module 20 and the second sensor module 30 are both disposed on the measuring circuit board 40. Exemplarily, the measuring circuit board 40 can determine the rotation angle of the first code channel 11 according to the first detection signal and the second detection signal. Exemplarily, the measuring circuit board 40 is used to be electrically connected or communicatively connected to other devices (such as the motor 200, etc.) to transmit the first detection signal and the second detection signal to the other devices, and the other devices can determine the rotation angle of the first code channel 11 according to the first detection signal and the second detection signal.

[0087] It can be understood that FIG. 2(A) and Figure 4 The number, shape and / or structure of the first magnetic pole 1211, the second magnetic pole 1212, the third magnetic pole 1111, and the fourth magnetic pole 1112 are only for illustration. In actual application, the number, shape and / or structure of the first magnetic pole 1211, the second magnetic pole 1212, the third magnetic pole 1111, and the fourth magnetic pole 1112 can be changed according to actual needs.

[0088] See also Figure 1 2(A), an embodiment of the present invention further provides an angle measuring device 100, including a trigger structure 10, a first sensor module 20 and a second sensor module 30. The trigger structure 10 can generate a magnetic field, and the trigger structure 10 includes a first code channel 11 and a second code channel 12. The first code channel 11 and the second code channel 12 are arranged opposite to each other. The first code channel 11 includes a first trigger area 111 that can generate a magnetic field, and the second code channel 12 includes a second trigger area 121 that can pass a light pulse or block a light pulse. The first sensor module 20 is arranged corresponding to the first code channel 11, and the first sensor module 20 is used to detect the magnetic field of the first trigger area 111 and generate a first detection signal, and the first detection signal is used to determine the rotation angle of the first code channel 11. The second sensor module 30 is arranged corresponding to the second code channel 12; the second sensor module 30 is used to detect a signal that a light pulse passes through the second trigger area 121 or a signal that a light pulse is blocked by the second trigger area 121, so as to generate a second detection signal, and the second detection signal is used to determine the position of a preset point of the second trigger area 121.

[0089] In the angle measuring device 100 of the above embodiment, since the first sensor module 20 is arranged corresponding to the first code channel 11; the first sensor module 20 is used to detect the magnetic field of the first triggering area 111 and generate a first detection signal, and the first detection signal is used to determine the rotation angle of the first code channel 11. The second sensor module 30 is arranged corresponding to the second code channel 12; the second sensor module 30 is arranged corresponding to the second code channel 12; the second sensor module 30 is used to detect the signal of the light pulse passing through the second triggering area 121 or the signal of the light pulse being blocked by the second triggering area 121 to generate a second detection signal, and the second detection signal is used to determine the position of the preset point of the second triggering area 121, the angle measuring device 100 has high angle measurement accuracy, compact structure and simple structure.

[0090] Exemplarily, the trigger structure 10 includes any one of the trigger structures 10 in the above embodiments. The anti-interference part 13 of the angle measuring device 100 in the above embodiments may also be omitted.

[0091] Exemplarily, the first sensor module 20 includes the first sensor module 20 of any one of the above embodiments.

[0092] In some embodiments, the second sensor module 30 includes a light receiving unit. Exemplarily, the light pulse emitted by the light emitting unit (not shown) can pass through the second triggering area 121, and the light receiving unit can receive the light pulse passing through the second triggering area 121 and generate a second detection signal. Exemplarily, the light pulse emitted by the light emitting unit can be blocked by the second triggering area 121, and the light receiving unit can detect the signal that the light pulse is blocked by the second triggering area 121 to generate the second detection signal.

[0093] See also Figure 1 2(A), an embodiment of the present invention further provides a measuring device, including a trigger structure 10, a first sensor module 20 and a second sensor module 30. The trigger structure 10 includes a first code channel 11 and a second code channel 12, and the first code channel 11 and the second code channel 12 are arranged opposite to each other; the first code channel 11 includes a first trigger area 111 capable of generating a magnetic field, and the second code channel 12 includes a second trigger area 121 capable of generating a magnetic field, and an anti-interference portion 13 is provided between the first trigger area 111 and the second trigger area 121 for reducing or eliminating the interference between the magnetic field of the first trigger area 111 and the magnetic field of the second trigger area 121. The first sensor module 20 is arranged corresponding to the first code channel 11, and the first sensor module 20 is used to detect the magnetic field of the first trigger area 111 and generate a first detection signal, and the first detection signal is used to determine the motion information of the first code channel 11. The second sensor module 30 is arranged corresponding to the second code channel 12, and the second sensor module 30 is used to detect the magnetic field of the second trigger area 121 and generate a second detection signal, and the second detection signal is used to determine the position of the preset point of the second trigger area 121.

[0094] In the measuring device of the above embodiment, since an anti-interference part 13 is provided between the first trigger area 111 and the second trigger area 121, the anti-interference part 13 is used to reduce or eliminate the interference between the magnetic field of the first trigger area 111 and the magnetic field of the second trigger area 121, thereby reducing or eliminating the mutual interference of the magnetic field strength between the first code channel 11 and the second code channel 12, improving the detection accuracy of the first sensor module 20 and the second sensor module 30, and further improving the measurement accuracy of the measuring device.

[0095] In addition, compared with the photoelectric angle detection structure, the measuring device of this embodiment has a first sensor module 20 for detecting the magnetic field of the first trigger area 111 and generating a first detection signal, and the first detection signal is used to determine the rotation angle of the first code channel 11; the second sensor module 30 is used to detect the magnetic field of the second trigger area 121 and generate a second detection signal, and the second detection signal is used to determine the position of the preset point of the second trigger area 121. Therefore, even under harsh working conditions such as high and low temperatures, the measuring device can have high measurement accuracy and resolution, and has a simple and compact structure and low cost.

[0096] In some embodiments, the motion information includes angle information or distance information. The angle information includes at least one of the following: rotation angle, rotation direction, etc. The distance information includes at least one of the following: motion distance, motion direction, etc.

[0097] Exemplarily, the motion information includes angle information. When the moving part 202 rotates, the trigger structure 10 can rotate synchronously with the moving part 202 , and the measuring device can measure the angle information of the moving part 202 .

[0098] In some embodiments, the motion information includes distance information. Exemplarily, the measuring device is used to measure the translation distance of the moving part 202 of the motor 200. For example, the measuring device is used to measure the translation distance of the motor 200 of the gimbal. Exemplarily, when the moving part 202 is in translation, the trigger structure 10 can move synchronously with the moving part 202, and the measuring device can measure the distance information of the moving part 202.

[0099] For example, when the moving part 202 reciprocates, the trigger structure 10 can move synchronously with the moving part 202, and the measuring device can measure the distance information of the moving part 202. For example, the moving part 202 can reciprocate under the drive of the motor 200, and the measuring device can measure the distance information of the moving part 202.

[0100] See also Figure 1 , Figure 2(A) and Figure 6 The embodiment of the present invention further provides a motor assembly 101, including a motor 200 and an angle measuring device 100, wherein the motor 200 includes a fixed component 201 and a moving component 202, and the moving component 202 can rotate relative to the fixed component 201. The angle measuring device 100 includes a trigger structure 10, a first sensor module 20, and a second sensor module 30. The trigger structure 10 is configured to rotate synchronously with the moving component 202, and the trigger structure 10 is provided with an accommodating space 14 for accommodating at least part of the motor 200, so that at least part of the motor 200 is located on the inner side of the trigger structure 10 in a direction perpendicular to the rotation axis of the motor 200; the trigger structure 10 includes a first code channel 11 and a second code channel 12, and the first code channel 11 is arranged opposite to the second code channel 12; the first code channel 11 includes a first trigger area 111 capable of generating a magnetic field, and the second code channel 12 includes a second trigger area 121 capable of generating a magnetic field. The first sensor module 20 is provided corresponding to the first code channel 11; the first sensor module 20 is used to detect the magnetic field of the first triggering area 111 and generate a first detection signal, and the first detection signal is used to determine the rotation angle of the moving part 202. The second sensor module 30 is provided corresponding to the second code channel 12; the second sensor module 30 is used to detect the magnetic field of the second triggering area 121 and generate a second detection signal, and the second detection signal is used to determine the position of the preset point of the second triggering area 121, and the position of the preset point is used to represent the zero position of the rotation of the moving part 202.

[0101] The motor assembly 101 of the above embodiment can reduce the weight of the trigger structure 10 and save the space occupied by the trigger structure 10 and the moving part 202 after they are assembled, because the trigger structure 10 is provided with a receiving space 14 for accommodating at least part of the motor 200, so that the structure after the trigger structure 10 and the moving part 202 are assembled is more compact, which is conducive to the miniaturization and lightweight design of the product.

[0102] Exemplarily, the angle measuring device 100 includes the angle measuring device 100 of any one of the above embodiments. The anti-interference unit 13 of the angle measuring device 100 of the above embodiments may also be omitted.

[0103] Exemplarily, the trigger structure 10 includes the trigger structure 10 of any one of the above embodiments. The first sensor module 20 includes the first sensor module 20 of any one of the above embodiments. The second sensor module 30 includes the second sensor module 30 of any one of the above embodiments.

[0104] Referring to FIG. 2(A), in some embodiments, an anti-interference portion 13 is provided between the first triggering area 111 and the second triggering area 121, and the anti-interference portion 13 is used to reduce the interference between the magnetic field of the first triggering area 111 and the magnetic field of the second triggering area 121, thereby improving the detection accuracy of the first sensor module 20 and the second sensor module 30, and further improving the measurement accuracy of the angle measurement device 100. Exemplarily, the anti-interference portion 13 includes the anti-interference portion 13 of any one of the above embodiments.

[0105] In some embodiments, the motor assembly 101 further includes a controller (not shown), which is electrically connected or communicatively connected to the motor 200, and can control the operation of the motor 200. The controller includes an information processing module, which can process the first detection signal detected by the first sensor module 20, so that there is no need to set up an additional signal processing device for the angle measurement device 100, which saves the number of components and reduces the cost.

[0106] The embodiment of the present invention further provides a measuring system, including a moving element (not shown); and an angle measuring device 100, a measuring device or a motor assembly 101, wherein the motor 200 of the motor assembly 101 is used to drive the moving element to move. The angle measuring device 100 includes the angle measuring device 100 of any one of the above embodiments. The measuring device includes the measuring device of any one of the above embodiments. The motor assembly 101 includes the motor assembly 101 of any one of the above embodiments. Exemplarily, the moving element may include an optical element or an antenna array plate, etc. The optical element may include at least one of the following: a lens, a reflector, a prism, a galvanometer, a grating, etc.

[0107] Exemplarily, the measuring system includes a laser radar, which includes a motor 200 and an optical element. The moving part 202 of the motor 200 can drive the optical element to rotate or deflect to change the propagation path of the laser, thereby scanning different FOVs. The trigger structure 10 can rotate with the rotation of the moving part 202 of the motor 200, so that the above-mentioned measuring device can detect the rotation parameter or deflection parameter of the optical element.

[0108] Exemplarily, the measurement system includes a millimeter wave radar, and the laser radar includes a motor 200 and an antenna array plate. The moving part 202 of the motor 200 can drive the antenna array plate to rotate to emit electromagnetic waves to complete the scanning of the outside world or receive radar signals in different directions. The trigger structure 10 can rotate with the rotation of the moving part 202 of the motor 200, so that the above-mentioned measurement device can detect the rotation parameters of the antenna array plate.

[0109] It is understandable that during the use of the measurement system including optical or photoelectric sensors, it is necessary to arrange corresponding extinction and light blocking apertures inside to eliminate the influence of abnormal light of stray light on product performance. In addition, the circuit board of the measurement system (not shown) usually has high power consumption and high requirements for electromagnetic shielding, so it is necessary to have a good heat dissipation path and conductive grounding path. However, the measurement system in the related art requires two parts to realize the above two functions, which will increase the volume of the measurement system and the cost is high.

[0110] To this end, an embodiment of the present application provides a measurement system to reduce the number of parts to be set and reduce the volume occupied by the product.

[0111] In some embodiments, the measurement system includes a laser radar, and the measurement system includes a structural component 300 , and the structural component 300 is used to be arranged on the optical path of a light transmitter (not shown) of the laser radar.

[0112] See also Figure 7 In some embodiments, the structure 300 includes an aperture 301, which is used to limit the effective light beam passing through the structure 300. The effective light beam may be a transmission light beam emitted by a laser radar; or, the effective light beam may also be a transmission light beam reflected by a detection object, and the effective light beam can be received by a light receiver of the laser radar.

[0113] See also Figure 7 In some embodiments, the structural member 300 includes a substrate (not shown), a matte layer 302 and an electroplating layer 303. The matte layer 302 is directly laid on the first area of ​​the substrate (not shown), and the electroplating layer 303 is directly laid on the second area of ​​the substrate (not shown), and the first area and the second area do not overlap. The matte layer 302 is used to reduce the transmission of stray light to the optical receiver of the laser radar to improve the detection accuracy of the laser radar; the electroplating layer 303 is used to connect with the circuit board of the laser radar to conduct the heat of the circuit board to the structural member 300 and dissipate it, and is used to achieve conductive grounding of the circuit board.

[0114] In the measurement system of the above embodiment, the matt layer 302 and the electroplating layer 303 are arranged on the surface of the same substrate, and do not need to be arranged on the surfaces of two different parts respectively, thereby reducing the number of parts to be arranged, reducing costs, reducing the weight of the product, reducing the occupied volume of the product, improving space utilization, and reducing the difficulty of management and control. In addition, the matt layer 302 is directly laid on the first area of ​​the substrate, and there is no need to arrange an electroplating material layer between the matt layer 302 and the first area (for example, the electroplating material layer is made of the same material as the electroplating layer 303), etc. The matt layer 302 is not easily separated from the substrate at the temperature of the welding condition or the temperature of the use condition, thereby improving the connection reliability between the matt layer 302 and the substrate, and ensuring that the structural member 300 can realize the function corresponding to the matt layer 302.

[0115] Exemplarily, the measurement system includes the measurement system of any one of the above embodiments.

[0116] It is understandable that the laser radar can also be replaced by other measurement systems, such as other optical sensors or photoelectric sensors, and the structural member 300 is arranged in the measurement system.

[0117] Exemplarily, the substrate includes a substrate made of a metal material. Exemplarily, the structural member 300 is disposed in the measurement system.

[0118] Exemplarily, the reflectivity of the matte layer 302 is less than or equal to a preset threshold value, thereby achieving the requirements of matte and light blocking.

[0119] Exemplarily, the matt layer 302 includes a structural layer formed by at least one of a light absorbing material and a low reflectivity material. The light absorbing material includes at least one of matt ink, black glue, and black foam. Exemplarily, the matt layer 302 includes a matt black coating, and the matt black coating includes at least one of the following: matt electrophoresis, micro-arc oxidation, and matt paint.

[0120] For example, the electroplating layer 303 can be welded to the circuit board by furnace welding to achieve at least one of the requirements of fixation, heat conduction and electricity conduction. For example, the electroplating layer 303 includes at least one of the following: a tin-plated layer, a gold-plated layer, a silver-plated layer, a copper-plated layer, other weldable metal layers, etc.

[0121] See also Figure 7In some embodiments, the structural member 300 further includes a laser engraving layer 304, which is directly laid on the third area of ​​the substrate (not shown), and the third area, the first area, and the second area do not overlap. The laser engraving layer 304 is used to improve the heat dissipation performance of the laser radar. In addition, the matte layer 302, the electroplating layer 303, and the laser engraving layer 304 are arranged on the surface of the same substrate, and do not need to be arranged on the surface of at least two parts, which reduces the number of parts to be set, reduces costs, reduces the weight of the product, reduces the occupied volume of the product, improves space utilization, and reduces the difficulty of management and control.

[0122] Exemplarily, the laser carving layer 304 can be effectively connected to the external structure to improve the anti-electromagnetic shielding performance and heat dissipation performance. Exemplarily, the laser carving layer 304 can be electrically connected to the external structure to improve the electromagnetic shielding performance. Exemplarily, the laser carving layer 304 can be thermally connected to the external structure to improve the heat dissipation performance of the circuit board or the measurement system.

[0123] Exemplarily, the processing method of the structural part 300 includes: processing the outer dimensions of the substrate and cleaning the surface; pre-treatment for electroplating; electroplating the entire outer surface of the substrate; shielding the second area, such as shielding the second area with stickers or rubber; stripping the unshielded surface of the substrate (stripping with a stripping agent such as nitric acid); pre-treatment of the matte black coating (sandblasting, passivation, etc.) on the first area; laying a matte black coating (matte photophoresis, micro-arc oxidation or anodizing, etc.) on the first area to form a matte layer 302; laying a laser carving layer 304 on the third area; and cleaning. The structural part 300 manufactured by this processing method has good reliability in the matte layer 302, the electroplating layer 303 and the laser carving layer 304, and can be reliably arranged on the substrate, and can be used under various working conditions such as low temperature conditions, high temperature conditions, high humidity conditions, and normal temperature and humidity conditions.

[0124] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "mechanically coupled" and "coupled" 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 directly connected or indirectly connected through an intermediate medium. It can be the internal connection of two elements or the interaction relationship between two elements. The mechanical coupling or coupling of two components includes direct coupling and indirect coupling, for example, direct fixed connection, connection through a transmission mechanism, etc. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0125] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0126] The disclosure above provides many different embodiments or examples for realizing different structures of the present invention. In order to simplify the disclosure of the present invention, the components and settings of specific examples are described above. Of course, they are merely examples, and the purpose is not to limit the present invention. In addition, the present invention may repeat reference numerals and / or reference letters in different examples, and this repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present invention provides various specific examples of processes and materials, but those of ordinary skill in the art may appreciate the application of other processes and / or the use of other materials.

[0127] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific method steps, features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific method steps, features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0128] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the present invention, and these modifications or replacements should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. An angle measuring device, characterized in that: include: A trigger structure, the trigger structure comprising a first code channel and a second code channel, the first code channel and the second code channel are arranged opposite to each other; the first code channel comprises a first trigger area capable of generating a magnetic field, the second code channel comprises a second trigger area capable of generating a magnetic field, and an anti-interference portion for reducing or eliminating interference between the magnetic field of the first trigger area and the magnetic field of the second trigger area is provided between the first trigger area and the second trigger area; A first sensor module, arranged corresponding to the first code channel, for detecting the magnetic field of the first triggering area and generating a first detection signal, wherein the first detection signal is used to determine the rotation angle of the first code channel; The second sensor module is arranged corresponding to the second code channel, and is used to detect the magnetic field of the second triggering area and generate a second detection signal, and the second detection signal is used to determine the position of the preset point of the second triggering area.

2. The angle measuring device according to claim 1, characterized in that: The anti-interference portion includes a non-magnetic region between the first triggering region and the second triggering region, so that the first triggering region and the second triggering region are spaced apart.

3. The angle measuring device according to claim 1, characterized in that: The magnetic field strength of the second triggering area is greater than the magnetic field strength of the area other than the second triggering area in the second code channel.

4. The angle measuring device according to claim 3, characterized in that: The area in the second code channel except the second trigger area is a non-magnetic area.

5. The angle measuring device according to claim 1, characterized in that: The second triggering area includes a first magnetic pole and two second magnetic poles, the first magnetic pole and the second magnetic pole have opposite polarities, and one of the second magnetic poles, the first magnetic pole and the other second magnetic pole are sequentially arranged along the circumference of the second code track.

6. The angle measuring device according to claim 1, characterized in that: The first triggering area is a continuous magnetic area.

7. The angle measuring device according to claim 1, characterized in that: The first trigger area includes a third magnetic pole and a fourth magnetic pole. The third magnetic pole has a polarity opposite to that of the fourth magnetic pole. The third magnetic pole and the fourth magnetic pole are alternately arranged along the circumference of the first code track.

8. The angle measuring device according to claim 7, characterized in that: The third magnetic pole is in contact with the fourth magnetic pole.

9. The angle measuring device according to claim 1, characterized in that: The distance between the side of the first trigger area close to the second code channel and the axis of the trigger structure is m1, the distance between the side of the second trigger area close to the first code channel and the axis of the trigger structure is m2, and m1 is greater than m2, wherein the trigger structure can rotate around the axis.

10. The angle measuring device according to claim 1, characterized in that: The first code channel has a first surface corresponding to the first sensor module, the second code channel has a second surface corresponding to the second sensor module, the projection of the first surface along the axis of the trigger structure and the projection of the second surface along the axis of the trigger structure are spaced apart, and the trigger structure can rotate around the axis.

11. The angle measuring device according to claim 1, characterized in that: The first code channel has a first surface corresponding to the first sensor module, the second code channel has a second surface corresponding to the second sensor module, the first sensor module, the first surface and the second surface are arranged in sequence along the projection of the axis of the trigger structure, and the trigger structure can rotate around the axis.

12. The angle measuring device according to any one of claims 1 to 11, characterized in that: The first triggering area includes a first magnetic conductive area or a first magnetic area; and / or The second triggering area includes a second magnetic conductive area or a second magnetic area; and / or The first sensor module includes at least one of the following: a magnetic grid sensor, a magnetoresistive sensor, a giant magneto-impedance sensor, and a Hall sensor; and / or, The second sensor module includes at least one of the following: a Hall sensor, a reed switch, and a magnetic switch.

13. The angle measuring device according to any one of claims 1 to 11, characterized in that: The position of the preset point is used to represent the zero position of the rotation of the moving component, and the moving component is used to rotate synchronously with the trigger structure.

14. An angle measuring device, characterized in that: include: A trigger structure capable of generating a magnetic field, the trigger structure comprising a first code channel and a second code channel, the first code channel and the second code channel are arranged opposite to each other, the first code channel comprises a first trigger area capable of generating a magnetic field, and the second code channel comprises a second trigger area capable of passing a light pulse or blocking a light pulse; A first sensor module, arranged corresponding to the first code channel, for detecting the magnetic field of the first triggering area and generating a first detection signal, wherein the first detection signal is used to determine the rotation angle of the first code channel; The second sensor module is arranged corresponding to the second code channel, and is used to detect the signal of the light pulse passing through the second trigger area or the signal of the light pulse being blocked by the second trigger area to generate a second detection signal, and the second detection signal is used to determine the position of the preset point of the second trigger area.

15. A measuring device, characterized in that: include: A trigger structure, the trigger structure comprising a first code channel and a second code channel, the first code channel and the second code channel are arranged opposite to each other; the first code channel comprises a first trigger area capable of generating a magnetic field, the second code channel comprises a second trigger area capable of generating a magnetic field, and an anti-interference portion for reducing or eliminating interference between the magnetic field of the first trigger area and the magnetic field of the second trigger area is provided between the first trigger area and the second trigger area; a first sensor module, arranged corresponding to the first code channel, for detecting the magnetic field of the first triggering area and generating a first detection signal, wherein the first detection signal is used to determine the motion information of the first code channel; The second sensor module is arranged corresponding to the second code channel, and is used to detect the magnetic field of the second triggering area and generate a second detection signal, and the second detection signal is used to determine the position of the preset point of the second triggering area.

16. The measuring device according to claim 15, characterized in that The motion information includes angle information or distance information.

17. A motor assembly, characterized in that: include: A motor, comprising a fixed part and a moving part, wherein the moving part can rotate relative to the fixed part; as well as An angle measuring device, the angle measuring device comprising: A trigger structure is configured to rotate synchronously with the moving part, and the trigger structure is provided with an accommodating space for accommodating at least part of the motor, so that at least part of the motor is located inside the trigger structure in a direction perpendicular to the rotation axis of the motor; the trigger structure includes a first code track and a second code track, the first code track is arranged opposite to the second code track; the first code track includes a first trigger area capable of generating a magnetic field, and the second code track includes a second trigger area capable of generating a magnetic field; A first sensor module, arranged corresponding to the first code channel, for detecting the magnetic field of the first triggering area and generating a first detection signal, wherein the first detection signal is used to determine the rotation angle of the moving part; The second sensor module is arranged corresponding to the second code channel, and is used to detect the magnetic field of the second trigger area and generate a second detection signal. The second detection signal is used to determine the position of a preset point of the second trigger area, and the position of the preset point is used to represent the zero position of the rotation of the moving part.

18. The motor assembly according to claim 17, characterized in that An anti-interference portion is disposed between the first triggering area and the second triggering area, and the anti-interference portion is used to reduce interference between the magnetic field of the first triggering area and the magnetic field of the second triggering area.

19. A measurement system, characterized in that: include: Motion components; as well as The angle measuring device described in any one of items 1-14, or the measuring device described in 15 or 16, or the motor assembly described in 17 or 18, wherein the motor of the motor assembly is used to drive the moving element to move.

20. The measuring system according to claim 19, characterized in that The measuring system comprises a laser radar, and the measuring system further comprises: A structural component, wherein the structural component is used to be arranged on the optical path of the optical transmitter of the laser radar, and the structural component includes a substrate, an extinction layer and an electroplating layer, wherein the extinction layer is directly laid on the first area of ​​the substrate, and the electroplating layer is directly laid on the second area of ​​the substrate, and the first area and the second area do not overlap, wherein the extinction layer is used to reduce the propagation of stray light to the optical receiver of the laser radar, and the electroplating layer is used to connect to the circuit board of the laser radar.

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