Measuring device

Abstract

The present application relates to a measuring device comprising: a stator member having a body on which a first coil group and a second coil group are arranged, coils in the first coil group and the second coil group being arranged spaced apart from each other along a circumferential direction of the body, and winding directions of every two adjacent coils in the first coil group being opposite, and winding directions of every two adjacent coils in the second coil group being opposite; the winding directions of every two adjacent coils in the second coil group are opposite; the rotor component and the stator component are coaxially arranged, and the rotor component is provided with a plurality of permanent magnets arranged according to a preset sequence in the circumferential direction corresponding to the first coil group and the second coil group, so that N and S alternate magnetic poles are formed on the rotor component. The measuring device is simple in structure, low in cost, high in precision and high in reliability.

Description

Technical Field

[0001] The present application relates to the technical field of measurement, and in particular to a measuring device. Background Art

[0002] With the rapid development of power electronics technology, drive technology, intelligent control technology, etc., servo motors, as one of the control system components, have been widely used in various industries. In order to achieve high efficiency and accuracy of the control system, it is usually necessary to set up corresponding measuring devices in the control system to measure the speed information and position information of the rotor components of the servo motor and send electrical signals of speed information and position information to the control system.

[0003] At present, the commonly used position detection devices mainly include photoelectric encoders, tachometer generators, and rotary transformers. Among them, the detection accuracy of photoelectric encoders is relatively high, but it is difficult to apply in high temperature, impact and harsh environments. The detection accuracy of tachometer generators is relatively low and the cost is high, and the scope of application is relatively small. The rotary transformer needs to provide a high-frequency excitation input voltage and requires a dedicated decoding chip to analyze the output signal, and the structure is complex.

[0004] The information disclosed in the background section of this application is only intended to increase the understanding of the overall background of this application, and should not be regarded as an admission or any form of suggestion that the information constitutes the prior art already known to a person skilled in the art. Summary of the invention

[0005] In view of the defects existing in the prior art, the present application aims to provide a measuring device, which has a simple structure, low cost, high precision and high reliability.

[0006] According to the first aspect of the present application, the present application provides a measuring device, comprising: a stator component, which has a body, on which a first coil group and a second coil group are arranged, the coils in the first coil group and the second coil group are arranged at intervals from each other along the circumferential direction of the body, and the winding directions of each two adjacent coils in the first coil group are opposite, and the winding directions of each two adjacent coils in the second coil group are opposite; and a mover component, which is arranged coaxially with the stator component, and the mover component is provided with a plurality of permanent magnets arranged in a predetermined order along the circumferential direction corresponding to the first coil group and the second coil group to form N and S phase magnetic poles on the mover component.

[0007] According to an exemplary embodiment of the present application, the body is configured in a circular ring shape and at least two coil mounting posts are disposed on an inner side of the body, and the mover component is disposed inside the stator component.

[0008] According to an exemplary embodiment of the present application, 12 coil mounting posts are provided on the inner side of the body, and the first coil group and the second coil group each include 6 coils; there is a mounting groove between every two coil mounting posts, so that the coils in the first coil group and the second coil group are wound on the coil mounting posts through the corresponding mounting grooves.

[0009] According to an exemplary embodiment of the present application, a protrusion is provided at the end of the coil installation column, and the protrusion is located on both sides of the coil installation column and extends into the installation groove.

[0010] According to an exemplary embodiment of the present application, the mover component is configured in a circular ring shape and is provided with six permanent magnets on its outer side, and the magnetic poles of the permanent magnets are along the radial direction of the mover component.

[0011] According to an exemplary embodiment of the present application, the mover component is configured in a circular ring shape and six permanent magnets are disposed inside the mover component, and the magnetic poles of the permanent magnets are along the radial direction of the mover component.

[0012] According to an exemplary embodiment of the present application, the mover component is provided in a circular ring shape and six permanent magnets are arranged inside the mover component, and the magnetic poles of the permanent magnets are along the circumferential direction of the mover component.

[0013] According to an exemplary embodiment of the present application, the permanent magnet is disposed obliquely along a direction of a central axis of the mover member.

[0014] According to an exemplary embodiment of the present application, the body is provided in a circular ring shape and at least two coil mounting posts are provided on an outer side surface of the body, and the mover component is provided outside the stator component.

[0015] According to an exemplary embodiment of the present application, 12 coil mounting posts are arranged on the outer side surface of the body, and the first coil group and the second coil group each include 6 coils; there is a mounting groove between every two coil mounting posts, so that the coils in the first coil group and the second coil group are wound on the coil mounting posts through the corresponding mounting grooves.

[0016] According to an exemplary embodiment of the present application, a protrusion is provided at the end of the coil installation column, and the protrusion is located on both sides of the coil installation column and extends into the installation groove.

[0017] According to an exemplary embodiment of the present application, the mover component is configured in a circular ring shape and has six permanent magnets disposed on its inner side surface, and the magnetic poles of the permanent magnets are along the radial direction of the mover component.

[0018] According to an exemplary embodiment of the present application, the mover component is coaxially connected to a rotor component of the servo motor; and the stator component is provided on a stator component of the servo motor.

[0019] According to a second aspect of the present application, the present application provides a measuring device, comprising: a stator component, which has a main body, on which a first coil group and a second coil group are arranged, the coils in the first coil group and the second coil group are arranged at intervals from each other along the circumferential direction of the main body, and the winding directions of each two adjacent coils in the first coil group are opposite, and the winding directions of each two adjacent coils in the second coil group are opposite; and a mover component, which is arranged coaxially with the stator component, and the mover component has a permanent magnet arranged in the circumferential direction corresponding to the first coil group and the second coil group, and the N and S magnetic poles of the permanent magnet are arranged at intervals from each other to form N and S phased magnetic poles on the mover component.

[0020] The measuring device of the present application provides an excitation magnetic field through permanent magnets whose N and S poles are spaced apart from each other on the movable component, and through the rotation of the movable component, the first coil group and the second coil group on the stator component can output a predetermined waveform to obtain the speed information and position information of the rotor of the servo motor. The measuring device has the characteristics of simple structure, low cost, high precision and high reliability.

[0021] The device of the present application has other characteristics and advantages, which will be obvious from the drawings and subsequent embodiments incorporated herein, or will be described in detail in the drawings and subsequent embodiments incorporated herein, which are used together to explain the specific principles of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the structure of a measuring device according to an embodiment of the present application.

[0023] Figure 2 It is a schematic structural diagram of a stator component of a measuring device according to an embodiment of the present application.

[0024] Figure 3 Schematic diagram of another structure of the stator component of the measuring device according to the embodiment of the present application.

[0025] Figure 4 It is a schematic structural diagram of a moving component of a measuring device according to an implementation scheme of the present application.

[0026] FIG. 5A to FIG. 5C It is a schematic structural diagram of a mover component of a measuring device according to another exemplary embodiment of the present application.

[0027] Figure 6It is a schematic diagram showing that the permanent magnet on the mover component of the measuring device according to the embodiment of the present application is arranged obliquely.

[0028] Figure 7 It is a schematic structural diagram of a measuring device according to another exemplary embodiment of the present application.

[0029] Figure 8 It is a schematic diagram of predetermined waveforms output by the first coil group and the second coil group of the measuring device according to the embodiment of the present application.

[0030] Description of reference numerals:

[0031] 100: Static component

[0032] 110: body 120: coil

[0033] 130: Coil mounting column 131: Protrusion

[0034] 140: Mounting slot

[0035] 200: Movers

[0036] 210: Permanent magnet

[0037] A1A2: first coil group B1B2: second coil group.

[0038] It should be understood that the drawings are not necessarily drawn to scale, but rather present simplified representations of various features to illustrate the basic principles of the present application. The specific design features disclosed in this application (including, for example, specific dimensions, directions, locations, and shapes) will be determined in part by the specific intended application and use environment.

[0039] In the figures, like reference numbers refer to the same or equivalent parts of the present application throughout the several figures of the drawing. DETAILED DESCRIPTION

[0040] The following will be referred to in detail various embodiments of the present application, examples of which are presented in the accompanying drawings and described below. Although the present application will be described in conjunction with exemplary embodiments, it should be understood that this specification is not intended to limit the present application to these exemplary embodiments. On the contrary, the present application is intended to not only cover these exemplary embodiments, but also cover various selected forms, modified forms, equivalent forms and other embodiments that can be included in the spirit of the present application and within the scope limited by the appended claims.

[0041] Combine the following Figures 1 to 7 The measuring device according to the embodiment of the present application is described.

[0042] Figure 1It is a schematic diagram of the structure of a measuring device according to an embodiment of the present application. Figure 2 It is a schematic structural diagram of a stator component of a measuring device according to an embodiment of the present application. Figure 3 Schematic diagram of another structure of the stator component of the measuring device according to the embodiment of the present application. Figure 4 It is a schematic structural diagram of a moving component of a measuring device according to an implementation scheme of the present application.

[0043] like Figures 1 to 4 As shown, the measuring device according to the embodiment of the present application includes: a stator component 100 and a mover component 200 .

[0044] The stator component 100 has a body 110, on which a first coil group A1A2 and a second coil group B1B2 are disposed. The coils 120 in the first coil group A1A2 and the second coil group B1B2 are disposed spaced apart from each other along the circumferential direction of the body 110, and the winding directions of each two adjacent coils 120 in the first coil group A1A2 are opposite, and the winding directions of each two adjacent coils 120 in the second coil group B1B2 are opposite.

[0045] The mover component 200 is coaxially arranged with the stator component 100 , and the mover component 200 is provided with a plurality of permanent magnets 210 arranged in a predetermined order along the circumferential direction corresponding to the first coil group A1A2 and the second coil group B1B2 to form N-phase and S-phase magnetic poles on the mover component 200 .

[0046] The stator component 100 and the mover component 200 are both made of magnetic conductive materials and can be formed by laminating soft magnetic material sheets (e.g., soft magnetic alloy sheets, silicon steel sheets, etc.). The mover component 200 can also be directly processed from magnetic conductive materials (e.g., soft magnetic materials, electrical pure iron, steel, etc.).

[0047] The permanent magnet 210 can provide an exciting magnetic field for the stator component 100. The N and S poles formed by arranging a plurality of permanent magnets 210 in a predetermined order can form a magnetic field of a predetermined direction around the mover component 200, so that when the mover component 200 rotates relative to the stator component 100, the coils 120 in the first coil group A1A2 and the second coil group B1B2 can generate a predetermined electrical signal under the action of the magnetic field.

[0048] The winding directions of each two adjacent coils 120 in the first coil group A1A2 are opposite, and the winding directions of each two adjacent coils 120 in the second coil group B1B2 are opposite. Figure 3As shown, in the exemplary embodiment of the present application, the first coil group A1A2 includes 6 coils, which are coil 120a1, coil 120a2, coil 120a3, coil 120a4, coil 120a5 and coil 120a6 in sequence. Among them, the winding direction of coil 120a1 is opposite to that of coil 120a2, the winding direction of coil 120a2 is opposite to that of coil 120a3, the winding direction of coil 120a3 is opposite to that of coil 120a4, the winding direction of coil 120a4 is opposite to that of coil 120a5, the winding direction of coil 120a5 is opposite to that of coil 120a6, and the winding direction of coil 120a6 is opposite to that of coil 120a1. The second coil group B1B2 includes 6 coils, which are coil 120b1, coil 120b2, coil 120b3, coil 120b4, coil 120b5 and coil 120b6 in sequence. The winding directions of coil 120b1 and coil 120b2 are opposite, the winding directions of coil 120b2 and coil 120b3 are opposite, the winding directions of coil 120b3 and coil 120b4 are opposite, the winding directions of coil 120b4 and coil 120b5 are opposite, the winding directions of coil 120b5 and coil 120b6 are opposite, and the winding directions of coil 120b6 and coil 120b1 are opposite. Figure 1 and Figure 4 As shown, the mover component 200 is provided with 6 permanent magnets 210 with alternating N and S poles corresponding to the first coil group A1A2 and the second coil group B1B2. According to the angle relationship between the permanent magnets 210 and each coil 120, when one of the N poles of the permanent magnet 210 corresponds to the coil 120a1, the S poles of the permanent magnet 210 adjacent to the N pole correspond to the coil 120a2 and the coil 120a6 adjacent to the coil 120a1, respectively. Therefore, the winding directions of the coils 120a2 and 120a6 are respectively opposite to the winding direction of the coil 120a1, so that the directions of the electrical signals generated by the coils 120a1, 120a2 and 120a6 under the action of the magnetic field can be the same. In other words, the winding directions of each adjacent two coils 120 in the first coil group A1A2 are opposite, so that the directions of the electrical signals generated by each adjacent two coils 120 in the first coil group A1A2 under the action of the magnetic field can be the same, thereby playing the role of superposition to enhance the electrical signal of the first coil group A1A2. Similarly, by making the winding directions of each two adjacent coils 120 in the second coil group B1B2 opposite, the directions of the electrical signals generated by each two adjacent coils 120 in the second coil group B1B2 under the action of the magnetic field can be made to be the same, thereby playing the role of superposition to enhance the electrical signal of the second coil group B1B2. In this way, the first coil group A1A2 and the second coil group B1B2 can output a predetermined waveform (such as Figure 8 As shown), and further obtain the speed information and position information of the moving component 200 relative to the stator component 100.

[0049] According to the exemplary embodiment of the present application, the mover component 200 can be coaxially connected to the rotor component of the servo motor, and the stator component 100 can be disposed on the stator component of the servo motor. When the rotor component of the servo motor rotates relative to the stator component of the servo motor, the mover component 200 can coaxially rotate relative to the stator component 100, so that the staff can adjust the waveform (such as the waveform output by the first coil group A1A2 and the second coil group B1B2) according to the predetermined waveform. Figure 8 As shown), the speed information and position information of the rotor component of the servo motor are obtained, thereby achieving high efficiency and accuracy of the control system.

[0050] According to the exemplary embodiment of the present application, Figure 1 As shown, the mover component 200 can be arranged inside the stator component 100. For example, in a servo motor that rotates on an axis, the rotor component is arranged inside the stator component. In this case, the mover component 200 can be coaxially connected to the rotating shaft of the servo motor, and the stator component 100 and the mover component 200 can be coaxially installed on the housing or end cover of the servo motor. Further, when the mover component 200 is arranged inside the stator component 100, as a preferred embodiment, the body 110 can be set to a circular ring shape (that is, the cross-sections of the inner edge of the body 110 and the outer edge of the body 110 are both set to a circle). However, in other embodiments, the cross-section of the outer edge of the body 110 can be set to other shapes according to actual needs, for example, a square.

[0051] According to the exemplary embodiment of the present application, Figures 1 to 3 As shown, at least two coil mounting posts 130 are provided on the inner side of the body 110. The first coil group A1A2 and the second coil group B1B2 each include at least one coil 120. Specifically, in the exemplary embodiment of the present application, 12 coil mounting posts 130 are provided on the inner side of the body 110, and the 12 coil mounting posts 130 are evenly arranged on the inner side of the body 110 and extend inwardly from the inner side of the body 110 along the radial direction of the body 110. There is a mounting groove 140 between every two coil mounting posts 130, so that the coils 120 in the first coil group A1A2 and the second coil group B1B2 are wound on the coil mounting posts 130 through the corresponding mounting grooves 140.

[0052] Further, the six coils in the first coil group A1A2 (i.e., coil 120a1, coil 120a2, coil 120a3, coil 120a4, coil 120a5 and coil 120a6) are respectively wound on six of the 12 coil mounting posts 130 that are spaced apart from each other through corresponding mounting grooves 140, and the six coils in the second coil group B1B2 (i.e., coil 120b1, coil 120b2, coil 120b3, coil 120b4, coil 120b5 and coil 120b6) are respectively wound on the other six of the 12 coil mounting posts 130 that are spaced apart from each other through corresponding mounting grooves 140, so that the coils 120 in the first coil group A1A2 and the second coil group B1B2 are arranged to be spaced apart from each other along the circumferential direction of the body 110.

[0053] Further, in the exemplary embodiment of the present application, the end of the coil mounting post 130 is provided with a protrusion 131. The protrusion 131 is located on both sides of the coil mounting post 130 and extends into the mounting groove 140 to prevent the coil 120 in the first coil group A1A2 and the second coil group B1B2 from detaching from the coil mounting post 130, thereby making the coil 120 wound on the coil mounting post 130 more stable. At the same time, the protrusion 131 can increase the magnetic flux in the coil 120, thereby enhancing the electrical signal generated by the coil 120 in the first coil group A1A2 and the second coil group B1B2, and improving the measurement accuracy and reliability of the measuring device of the present application. In addition, the protrusion 131 can also reduce the tooth ramp, making the output signal easier to detect.

[0054] According to the exemplary embodiment of the present application, Figure 1 and Figure 4 As shown, the mover component 200 is set in a circular ring shape. The size of the mover component 200 corresponds to the size of the stator component 100, so that the mover component 200 can rotate inside the stator component 100. As a preferred embodiment, the mover component 200 is provided with 6 permanent magnets 210 on its outer surface, and the magnetic poles of the permanent magnets 210 are along the radial direction of the mover component 200. The material of the permanent magnet 210 can be a rare earth permanent magnet material, such as neodymium iron boron, samarium cobalt, etc., or a common permanent magnet material, such as ferrite, aluminum nickel cobalt, etc.

[0055] Specifically, Figure 4 As shown, the permanent magnet 210 can be configured as an arc-shaped structure adapted to the outer edge of the mover component 200 to better fit the outer side of the mover component 200. Further, six permanent magnets 210 can be evenly arranged on the outer side of the mover component 200.

[0056] Further, according to another exemplary embodiment of the present application, as Figure 5A and Figure 5BAs shown, the mover component 200 is provided with six permanent magnets 210 inside. Figure 5A As shown, the cross section of the permanent magnet 210 may be a long rectangle and arranged along the circumferential direction of the mover member 200, so that the magnetic poles of the permanent magnet 210 are along the radial direction of the mover member 200. As another option, as Figure 5B As shown, the cross section of the permanent magnet 210 may also be a long rectangle and arranged along the radial direction of the mover member 200, so that the magnetic poles of the permanent magnet 210 are along the circumferential direction of the mover member 200. It should be clear that the shape of the cross section of the permanent magnet 210 and the direction of its arrangement include but are not limited to the above-mentioned methods, as long as a magnetic field in a predetermined direction can be formed around the mover member 200.

[0057] It is worth noting that in the above exemplary embodiments, the number of permanent magnets 210 on the mover member 200 is set to 6, but it should be clear that the number of permanent magnets 210 can be set to a different number between 2 and 100. The more permanent magnets 210 there are on the mover member 200, the higher the accuracy of the measuring device of the present application. The staff can selectively set the number of permanent magnets 210 according to actual needs.

[0058] According to the exemplary embodiment of the present application, Figure 6 As shown, the permanent magnet 210 is arranged obliquely along the direction of the central axis of the mover component 200 to reduce tooth harmonics and magnetic potential harmonics. In addition, in another exemplary embodiment of the present application, the coil mounting column 130 can also be extended obliquely inward along the radial direction of the body 110, so that the coils 120 in the first coil group A1A2 and the second coil group B1B2 are arranged obliquely in the circumferential direction of the body 110.

[0059] According to another exemplary embodiment of the present application, Figure 7 As shown, the mover component 200 can be arranged outside the stator component 100. For example, in a servo motor that does not rotate on the shaft, the rotor component is arranged outside the stator component. In this case, the mover component 200 can be coaxially connected to the rotating component of the servo motor, and the stator component 100 can be mounted on the shaft of the servo motor.

[0060] Specifically, the stator component 100 and the mover component 200 are both arranged in a circular ring shape, wherein the size of the mover component 200 corresponds to the size of the stator component 100 , so that the mover component 200 can rotate outside the stator component 100 .

[0061] Furthermore, six permanent magnets 210 are disposed on the inner side surface of the mover component 200 , and the magnetic poles of the permanent magnets 210 are along the radial direction of the mover component 200 .

[0062] Further, 12 coil mounting posts 130 are arranged on the outer side of the body 110. The 12 coil mounting posts 130 can be evenly arranged on the outer side of the body 110 and extend outward from the outer side of the body 110 along the radial direction of the body 110. A mounting groove 140 is provided between every two coil mounting posts 130. The first coil group A1A2 and the second coil group B1B2 each include 6 coils 120. The 6 coils 120 in the first coil group A1A2 are wound on 6 of the 12 coil mounting posts 130 spaced apart from each other through the corresponding mounting grooves 140, and the 6 coils 120 in the second coil group B1B2 are wound on the other 6 of the 12 coil mounting posts 130 spaced apart from each other through the corresponding mounting grooves 140, so that the coils 120 in the first coil group A1A2 and the second coil group B1B2 are arranged spaced apart from each other along the circumferential direction of the body 110.

[0063] Furthermore, a protrusion 131 is provided at the end of the coil installation column 130 , and the protrusion 131 is located on both sides of the coil installation column 130 and extends into the installation groove 140 .

[0064] According to another exemplary embodiment of the present application, Figure 5C As shown, the mover component 200 is provided with a permanent magnet 210 in the circumferential direction corresponding to the first coil group A1A2 and the second coil group B1B2. The N and S magnetic poles of the permanent magnet 210 are arranged at intervals from each other to form N and S interlaced magnetic poles on the mover component 200. Through such an implementation scheme, the function of the present application can also be achieved.

[0065] The operation of the measuring device according to the embodiment of the present application will be described below in conjunction with the accompanying drawings.

[0066] First, the mover component 200 is coaxially connected to the rotor component of the servo motor. The stator component 100 is disposed on the stator component of the servo motor, such as a stationary shaft, and the stator component 100 is coaxial with the mover component 200.

[0067] When the servo motor is working, the mover component 200 rotates coaxially with the rotor component of the servo motor, so that the permanent magnet 210 on the mover component 200 rotates accordingly, so that the magnetic field around the mover component 200 changes according to the rotation speed and rotation position of the mover component 200. The changing magnetic field causes the magnetic flux passing through the coil 120 in the first coil group A1A2 and the second coil group B1B2 to change, so that the coil 120 generates a predetermined electrical signal, and then the first coil group A1A2 and the second coil group B1B2 output a predetermined waveform (such as Figure 8 shown).

[0068] The measuring device of the present application can be electrically connected to a control system. The staff can set a corresponding program through the control system to compare and calculate the predetermined waveforms output by the first coil group A1A2 and the second coil group B1B2, so as to obtain the speed information and position information of the mover component 200 relative to the stator component 100, and then obtain the speed information and position information of the rotor component relative to the stator component, that is, the speed information and position information of the rotor component. At the same time, the measuring device of the present application can feed back the speed information and position information to the control system in real time, so that the control system can further control the rotation of the rotor component according to the speed information and position information, so as to achieve the high efficiency and accuracy of the control system.

[0069] For convenience of interpretation and precise definition of the appended claims, the terms "upper", "lower", "inner", "outer", "inner side", "outer side", "interior", "exterior", "inner side", and "outer side" are used to describe the features of the exemplary embodiments with reference to the positions of these features shown in the accompanying drawings.

[0070] The description presented above of the specific exemplary embodiments of the present application is for the purpose of illustration and description. The foregoing description is not intended to be exhaustive, nor is it intended to limit the present application to the precise form disclosed, and it is clear that many changes and variations are possible according to the above teachings. The exemplary embodiments are selected and described in order to explain the specific principles of the present application and its practical application, so that other technical personnel in the field can realize and utilize the various exemplary embodiments of the present application and its different selected forms and modified forms. The scope of the present application is limited by the attached claims and their equivalents.

Claims

1. A measuring device, characterized in that: include: A stator component having a body, wherein a first coil group and a second coil group are disposed on the body, wherein the coils in the first coil group and the second coil group are disposed spaced apart from each other along a circumferential direction of the body, and each adjacent two coils in the first coil group are wound in opposite directions, and each adjacent two coils in the second coil group are wound in opposite directions; and The movable member is coaxially arranged with the stator member, and is provided with a plurality of permanent magnets arranged in a predetermined order along the circumferential direction corresponding to the first coil group and the second coil group to form N-phase and S-phase magnetic poles on the movable member.

2. The measuring device according to claim 1, characterized in that The body is arranged in a circular ring shape and at least two coil mounting posts are arranged on the inner side surface of the body, and the mover component is arranged inside the stator component.

3. The measuring device according to claim 2, characterized in that Twelve coil mounting posts are arranged on the inner side of the body, and the first coil group and the second coil group each include 6 coils; There is a mounting groove between every two coil mounting posts, so that the coils in the first coil group and the second coil group are wound on the coil mounting posts through the corresponding mounting grooves.

4. The measuring device according to claim 3, characterized in that The end of the coil installation column is provided with a protrusion, and the protrusion is located on both sides of the coil installation column and extends into the installation groove.

5. The measuring device according to claim 4, characterized in that The mover component is arranged in a circular ring shape and has six permanent magnets arranged on its outer side, wherein the magnetic poles of the permanent magnets are along the radial direction of the mover component.

6. The measuring device according to claim 4, characterized in that The mover component is arranged in a circular ring shape and has six permanent magnets arranged inside the mover component. The magnetic poles of the permanent magnets are along the radial direction of the mover component.

7. The measuring device according to claim 4, characterized in that The mover component is arranged in a circular ring shape and has six permanent magnets arranged inside the mover component. The magnetic poles of the permanent magnets are along the circumferential direction of the mover component.

8. The measuring device according to any one of claims 5 to 7, characterized in that: The permanent magnet is disposed obliquely along the direction of the central axis of the mover component.

9. The measuring device according to claim 1, characterized in that The body is arranged in a circular ring shape and at least two coil mounting posts are arranged on the outer side surface of the body, and the mover component is arranged outside the stator component.

10. The measuring device according to claim 9, characterized in that Twelve coil mounting posts are arranged on the outer side of the body, and the first coil group and the second coil group each include 6 coils; There is a mounting groove between every two coil mounting posts, so that the coils in the first coil group and the second coil group are wound on the coil mounting posts through the corresponding mounting grooves.

11. The measuring device according to claim 10, characterized in that The end of the coil installation column is provided with a protrusion, and the protrusion is located on both sides of the coil installation column and extends into the installation groove.

12. The measuring device according to claim 11, characterized in that The mover component is arranged in a circular ring shape and has six permanent magnets arranged on its inner side surface, wherein the magnetic poles of the permanent magnets are along the radial direction of the mover component.

13. The measuring device according to claim 1, characterized in that The mover component is coaxially connected to the rotor component of the servo motor; The stator component is arranged on the stator part of the servo motor.

14. A measuring device, characterized in that: include: A stator component having a body, wherein a first coil group and a second coil group are disposed on the body, wherein the coils in the first coil group and the second coil group are disposed spaced apart from each other along a circumferential direction of the body, and each adjacent two coils in the first coil group are wound in opposite directions, and each adjacent two coils in the second coil group are wound in opposite directions; and The movable component is coaxially arranged with the stator component, and the movable component is provided with a permanent magnet in the circumferential direction corresponding to the first coil group and the second coil group, and the N and S magnetic poles of the permanent magnet are arranged at intervals from each other to form N and S alternating magnetic poles on the movable component.

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