Driving sensor device having a non-contact type magnetic rotary encoder unit

Abstract

To provide a driving sensor device having a non-contact type magnetic rotary encoder unit, which can solve at least one of the shortcomings of the prior art.SOLUTION: In a driving sensor device having a non-contact type magnetic rotary encoder unit, which includes a drive unit 1, a magnetic rotary encoder unit 2, and a sensor unit 3, the magnetic rotary encoder unit 2 includes a main magnetic interlocking portion 214 arranged on a main transmission wheel 21 driven by a drive shaft 13 of the drive unit 1, a first magnetic interlocking portion 224 arranged on a first transmission wheel 22 rotatably supported adjacent to the main magnetic interlocking portion 214, and a second magnetic interlocking portion 224 arranged on a second transmission wheel 22 rotatably supported adjacent to the main magnetic interlocking portion 214, and uses the magnetism of the main magnetic interlocking portion 214 to rotate and drive the first magnetic interlocking portion 224 and the second magnetic interlocking portion 234.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a drive sensor device, and more particularly to a drive sensor device having a non-contact type magnetic rotary encoder unit. [Background technology]

[0002] As shown in Patent Document 1, a conventional motor includes a drive shaft driven by a drive unit, a drive gear attached to the drive shaft, two driven gears attached to mesh with the drive gear, a rotary encoder, and a control means electrically connected to the rotary encoder and the drive unit.

[0003] The rotary encoder is configured to include three rotating disks that rotate together with the drive gear and the two driven gears, three light-emitting units that are arranged to correspond to the rotating disks, and three sensor assemblies that are arranged to correspond to the rotating disks. Each rotating disk has a plurality of encoding areas, and each encoding area is configured by an arrangement of transparent and opaque areas.

[0004] Each sensor assembly has two sensors, and each sensor detects whether the light from the light-emitting unit passes through the transparent part of the encoding area of ​​the corresponding turntable, thereby detecting the rotation status of the turntable, and accurately calculating the rotation speed of the drive shaft based on the detection result, so that the control means can more accurately control the drive unit based on the accurate detection result of the rotary encoder.

[0005] On the other hand, what the sensor assembly of a rotary encoder detects is the rotation status of the rotating disk, and each rotating disk is arranged to be linked to a drive gear and two driven gears that are attached to mesh with the drive gear. Therefore, if there is a malfunction or error in the meshing between the drive gear and the two driven gears, accurate detection results cannot be obtained. Furthermore, wear due to the meshing between the drive gear and the driven gears is inevitable, so regular maintenance is required to maintain accurate detection results. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] China Patent Application Publication No. 102607616 Summary of the Invention [Problem to be solved by the invention]

[0007] SUMMARY OF THE PRESENT EMBODIMENTS An object of the present invention is to provide a drive sensor device having a non-contact type magnetic rotary encoder unit that can solve at least one of the drawbacks of the prior art. [Means for solving the problem]

[0008] In view of the above problems, the present invention provides a driving sensor device having a non-contact type magnetic rotary encoder unit, the driving sensor device including a driving unit, a magnetic rotary encoder unit, a sensor unit, and a calculation unit, The drive unit is configured to include a drive body, a support base, and a drive shaft that passes through the support base and has a drive end and a connection end opposite the drive end at both ends, and is driven to rotate by the drive body; The magnetic rotary encoder unit is configured to have a main transmission wheel arranged to wrap around the drive shaft, a first transmission wheel rotatably arranged on the support base, and a second transmission wheel rotatably arranged on the support base, the main transmission wheel has a main transmission wheel body fixed to the connection end, a main feedback unit fixed to the main transmission wheel body, and a main magnetic interlocking unit fixed to the main transmission wheel body, the first transmission wheel has a first transmission wheel body rotatably arranged on the support base, a first feedback unit fixed to the first transmission wheel body, and a first magnetic interlocking unit fixed to the first transmission wheel body, The second transmission wheel has a second transmission wheel body rotatably arranged on the support base, a second feedback unit fixedly arranged on the second transmission wheel body, and a second magnetic interlocking unit fixedly arranged on the second transmission wheel body, and is configured such that, when the main transmission wheel body rotates, the first transmission wheel body and the second transmission wheel body are rotated in an interlocking manner relative to the support base by the main magnetic interlocking unit moving the first magnetic interlocking unit and the second magnetic interlocking unit using magnetism, the sensor unit is configured to include a sensor substrate disposed between the main transmission wheel, the first transmission wheel, and the second transmission wheel; a main sensor assembly disposed on the sensor substrate facing the main feedback section, the main sensor assembly detecting a state of the main feedback section and generating a corresponding main detection signal; a first sensor assembly disposed on the sensor substrate facing the first feedback section, the first sensor assembly detecting a state of the first feedback section and generating a corresponding first detection signal; and a second sensor assembly disposed on the sensor substrate facing the second feedback section, the second sensor assembly detecting a state of the second feedback section and generating a corresponding second detection signal; The calculation unit is signal-connected to the main sensor assembly, the first sensor assembly, and the second sensor assembly, and is configured to calculate a rotation number corresponding to the main transmission wheel body based on the main detection signal, the first detection signal, and the second detection signal. Effect of the Invention

[0009] The drive sensor device having a non-contact type magnetic rotary encoder unit of the present invention is configured so that when the main transmission wheel body rotates, the main magnetic interlocking part uses magnetism to move the first magnetic interlocking part and the second magnetic interlocking part, thereby rotating the first transmission wheel body and the second transmission wheel body in conjunction with each other and rotating them relative to the support base.Therefore, a drive sensor device having a non-contact type magnetic rotary encoder unit that does not use gear meshing can be provided, there is no wear due to gear meshing, and therefore maintenance such as gear replacement is not required, and accurate detection results can be provided at low cost. [Brief description of the drawings]

[0010] [Figure 1] 1 is a partially exploded perspective view showing an embodiment of a drive sensor device having a non-contact type magnetic rotary encoder unit of the present invention; [Diagram 2] FIG. 2 is a partially exploded perspective view of the embodiment, the viewing angle of which is different from that of FIG. [Diagram 3] FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] Before going into a specific description, components that play the same role in the present invention are assigned the same reference numerals even if they are not exactly the same. Furthermore, terms such as "front", "rear", "left", "right", "upper", and "lower" in the following description are used to easily explain the relative positional relationship between each component, and do not limit the configuration of the present invention.

[0012] Figures 1 and 2 show one embodiment of a drive sensor device having a non-contact type magnetic rotary encoder unit of the present invention, and as shown, this drive sensor device having a non-contact type magnetic rotary encoder unit comprises a drive unit 1, a non-contact type magnetic rotary encoder unit 2, a sensor unit 3, and a calculation unit 4.

[0013] The drive unit 1 includes a drive body 11, a support base 12, a drive shaft 13 that passes through the support base 12 and has a drive end 131 and a connection end 132 on both ends opposite the drive end 131, and is driven to rotate by the drive body 11, and a package case 14 that houses these, the non-contact type magnetic rotary encoder unit 2, and the sensor unit 3. The drive shaft 13 is driven to rotate by the drive body 11, and in this embodiment, the drive end 131 is connected to the drive body 11.

[0014] As shown in Figures 2 and 3, the non-contact type magnetic rotary encoder unit 2 is configured to have a main transmission wheel 21 arranged to wrap around the drive shaft 13, a first transmission wheel 22 rotatably arranged on the support base 12, and a second transmission wheel 23 rotatably arranged on the support base 12.

[0015] The main transmission wheel 21 rotates around the main axis L0 as a rotation axis, and includes a main transmission wheel body 210 fixed to the connection end 132 of the drive shaft 13, a main feedback unit 211 fixed to the main transmission wheel body 210, and a main magnetic interlocking unit 214 fixed to the main transmission wheel body 210. The main feedback unit 211 includes a main magnetic surface 212 facing the opposite side of the support base 12, and a main magnetic means 213 arranged on the main magnetic surface 212. The main magnetic interlocking unit 214 is formed by a plurality of main magnetic poles 215 arranged in a substantially annular shape centered on the main axis L0, and the ends of two adjacent main magnetic poles 215 corresponding to the outer circumferential surface of the annular ring have opposite magnetism. That is, the main magnetic poles 215 emitting magnetism of N pole, S pole, N pole, S pole... are arranged on the outer circumferential surface of the annular main magnetic interlocking unit 214. More specifically, in this embodiment, the main magnetic linkage portion 214 is made up of 32 main magnetic poles 215 .

[0016] The first transmission wheel 22 rotates about the first axis L1 as a rotation axis, and has a first transmission wheel body 220 rotatably arranged on the support base 12, a first feedback unit 221 fixedly arranged on the first transmission wheel body 220, and a first magnetic interlocking unit 224 fixedly arranged on the first transmission wheel body 220. The first feedback unit 221 has a first magnetic surface 222 facing the opposite side of the support base 12, and a first magnetic means 223 arranged on the first magnetic surface 222. The first magnetic interlocking unit 224 is formed by a plurality of first magnetic poles 225 arranged in a substantially annular shape centered on the first axis L1, and the ends of two adjacent first magnetic poles 225 corresponding to the outer circumferential surface of the annular ring have opposite magnetism. That is, the first magnetic poles 225 that generate magnetism of N pole, S pole, N pole, S pole ... are arranged on the outer circumferential surface of the annular first magnetic interlocking part 224. More specifically, in this embodiment, the first magnetic interlocking part 224 is composed of 34 first magnetic poles 225.

[0017] The second transmission wheel 23 rotates about the second axis L2 as a rotation axis, and has a second transmission wheel body 230 rotatably arranged on the support base 12, a second feedback unit 231 fixedly arranged on the second transmission wheel body 230, and a second magnetic interlocking unit 234 fixedly arranged on the second transmission wheel body 230. The second feedback unit 231 has a second magnetic surface 232 facing the opposite side of the support base 12, and a second magnetic means 233 arranged on the second magnetic surface 232. The second magnetic interlocking unit 234 is formed by a plurality of second magnetic poles 235 arranged in a substantially annular shape centered on the second axis L2, and the ends of two adjacent second magnetic poles 235 corresponding to the outer circumferential surface of the annular ring have opposite magnetism. That is, the second magnetic poles 235 that generate magnetism of N pole, S pole, N pole, S pole ... are arranged on the outer circumferential surface of the annular second magnetic interlocking part 234. More specifically, in this embodiment, the second magnetic interlocking part 234 is composed of 30 second magnetic poles 235.

[0018] 3, in this embodiment, the shortest distance between the main magnetic interlocking portion 214 and the first magnetic interlocking portion 224 and the shortest distance between the main magnetic interlocking portion 214 and the second magnetic interlocking portion 234 are both set to 0.5 mm and are substantially the same, and the number of the first magnetic poles 225, 34, is greater than the number of the main magnetic poles 215, 32, which is greater than the number of the second magnetic poles 235, 30. In addition, the arc length of the outer circumferential surface of each main magnetic pole 215, the arc length of the outer circumferential surface of each first magnetic pole 225, and the arc length of the outer circumferential surface of each second magnetic pole 235 are substantially the same. That is, the radius ratio of the first magnetic interlocking portion 224, the main magnetic interlocking portion 214, and the second magnetic interlocking portion 234 formed in an annular shape is 34:32:30.

[0019] In this embodiment, the main axis L0, the first axis L1 and the second axis L2 are substantially parallel, the first transmission wheel 22, the main transmission wheel 21 and the second transmission wheel 23 are arranged at a distance from each other along an arrangement axis L3 perpendicular to the main axis L0, and the main transmission wheel 21 is arranged between the first transmission wheel 22 and the second transmission wheel 23 so that the shortest distance between the main magnetic interlocking portion 214 and the first magnetic interlocking portion 224 and the shortest distance between the main magnetic interlocking portion 214 and the second magnetic interlocking portion 234 are both set to 0.5 mm and are substantially identical.

[0020] Incidentally, in the present invention, the shapes of the main magnetic pole 215 constituting the main magnetic interlocking portion 214, the first magnetic pole 225 constituting the first magnetic interlocking portion 224, and the second magnetic pole 235 constituting the second magnetic interlocking portion 234 are not limited to the shapes shown in FIG. 3, and can be appropriately changed to other shapes as long as the first magnetic interlocking portion 224 and the second magnetic interlocking portion 234 are configured to be able to rotate in conjunction with the rotation of the main magnetic interlocking portion 214.

[0021] As shown in Figures 1 to 3, the sensor unit 3 is configured to have a sensor substrate 31 arranged with a gap between the main transmission wheel 21, the first transmission wheel 22, and the second transmission wheel 23, a main sensor assembly 32 arranged on the sensor substrate 31 so as to face the main feedback section 211 and configured to detect the status of the main feedback section 211 and generate a corresponding main detection signal, a first sensor assembly 33 arranged on the sensor substrate 31 so as to face the first feedback section 221 and configured to detect the status of the first feedback section 221 and generate a corresponding first detection signal, and a second sensor assembly 34 arranged on the sensor substrate 31 so as to face the second feedback section 231 and configured to detect the status of the second feedback section 231 and generate a corresponding second detection signal.

[0022] Specifically, the main sensor assembly 32 has a main magnetic sensing means 321 facing the main magnetic surface 212, and the main magnetic sensing means 321 detects the rotation status of the main magnetic means 213 disposed on the main magnetic surface 212 of the main transmission wheel 21 rotating with the drive shaft 13, and generates a corresponding main sensing signal. More specifically, in this embodiment, every time the main magnetic means 213 rotating with the drive shaft 13 passes a predetermined position, a main sensing signal is generated and output to the calculation unit 4.

[0023] In addition, the first sensor assembly 33 has a first magnetic detection means 331 facing the first magnetic surface 222, and the first magnetic detection means 331 detects the rotation status of the first magnetic means 223 arranged on the first magnetic surface 222 of the first transmission wheel 22 that rotates in conjunction with the rotation of the main transmission wheel 21, and generates a corresponding first detection signal. More specifically, in this embodiment, every time the first magnetic means 223 rotating together with the first transmission wheel 22 passes a predetermined position, the first detection signal is generated and output to the calculation unit 4. The second sensor assembly 34 has a second magnetic detection means 341 facing the second magnetic surface 232, and the second magnetic detection means 341 detects the rotational state of the second magnetic means 233 arranged on the second magnetic surface 232 of the second transmission wheel 23 that rotates in conjunction with the rotation of the main transmission wheel 21, and generates a corresponding second detection signal. More specifically, in this embodiment, every time the second magnetic means 233 rotating together with the second transmission wheel 23 passes a predetermined position, the second detection signal is generated and output to the calculation unit 4.

[0024] The calculation unit 4 is signal-connected to the main sensor assembly 32, the first sensor assembly 33 and the second sensor assembly 34, and calculates the rotation speed corresponding to the main transmission wheel body 210 based on the received main detection signal, the first detection signal and the second detection signal.

[0025] In other words, when the driving body 11 rotates the driving shaft 13 at a constant speed, the main transmission wheel 21 rotating together with the driving shaft 13 rotates around the main axis L0 as its rotation axis. At this time, the main magnetic poles 215 in the main magnetic interlocking part 214 attached to the main transmission wheel 21 also rotate together, causing the magnetic field of each main magnetic pole 215 to move. As a result, the first magnetic poles 225 of the first magnetic interlocking part 224 attached to the first transmission wheel 22 and the second magnetic poles 235 of the second magnetic interlocking part 234 attached to the second transmission wheel 23 are moved by the movement of the magnetic field of each main magnetic pole 215 in the opposite direction to the main transmission wheel 21, thereby rotating the first transmission wheel 22 and the second transmission wheel 23 around the first axis L1 and the second axis L2 as their rotation axes, respectively.

[0026] Then, the main magnetic means 213 attached to the main magnetic surface 212 also rotates, and each time the main magnetic means 213 passes a predetermined position due to this rotation, the main magnetic detection means 321 of the main sensor assembly 32 generates a main detection signal and outputs it to the calculation unit 4.

[0027] In addition, the first magnetic means 223 attached to the first magnetic surface 222 rotates in unison, and each time the first magnetic means 223 passes a predetermined position due to this rotation, the first magnetic detection means 331 of the first sensor assembly 33 generates a first detection signal and outputs it to the calculation unit 4.

[0028] In addition, the second magnetic means 233 attached to the second magnetic surface 232 rotates in conjunction with the second magnetic means 233, and each time the second magnetic means 233 passes a predetermined position due to this rotation, the second magnetic detection means 341 of the second sensor assembly 34 generates a second detection signal and outputs it to the calculation unit 4.

[0029] The calculation unit 4 counts the number of times the main sensing signal, the first sensing signal and the second sensing signal are received respectively, and calculates the precise rotation number of the main transmission wheel body 210 according to the counted number of times.

[0030] That is, in this embodiment, the number of the main magnetic poles 215 is 32, the number of the first magnetic poles 225 is 34, and the number of the second magnetic poles 235 is 30, which are different from each other, so that the calculation unit 4 can calculate the rotation speed of the main transmission wheel 21 more accurately than the integer which is the number of times the received main detection signals are counted.

[0031] Furthermore, when calculating the rotation speed of the main transmission wheel 21, in practice, the first detection signal and the second detection signal are compared using the count values ​​received respectively. In this embodiment, since the number of the first magnetic poles 225 is 34 and the number of the second magnetic poles 235 is 30, the main transmission wheel body 210 is reset once every time it reaches 510, which is the least common multiple of 34 and 30. However, the calculation unit 4 can deal with this reset problem by recording the number of times it is reset.

[0032] Note that the above-mentioned quantities of the main magnetic poles 215, first magnetic poles 225, and second magnetic poles 235 are merely examples, and it is sufficient that the number of first magnetic poles 225 is greater than the number of main magnetic poles 215, and the number of main magnetic poles 215 is greater than the number of second magnetic poles 235.

[0033] In this way, this embodiment of the driving sensor device with a non-contact type magnetic rotary encoder unit of the present invention utilizes the sensor unit 3 and the calculation unit 4 to realize incremental and absolute rotary encoders, and can accurately calculate the rotation speed of the main transmission wheel body 210 directly driven by the drive shaft 13 to within an integer.

[0034] As described above, the driving sensor device having the non-contact type magnetic rotary encoder unit of the present invention can achieve the following effects.

[0035] First, the main magnetic interlocking part 214, the first magnetic interlocking part 224 and the second magnetic interlocking part 234 are respectively arranged on the main transmission wheel body 210, the first transmission wheel body 220 and the second transmission wheel body 230. The magnetism generated by the main magnetic pole 215, the first magnetic pole 225 and the second magnetic pole 235 constituting these parts is utilized to rotate the first magnetic interlocking part 224 and the second magnetic interlocking part 234 in conjunction with the main magnetic interlocking part 214. This makes it possible to accurately calculate the rotation speed of the main transmission wheel body 210 to within an integer. Furthermore, since the main magnetic interlocking part 214, the first magnetic interlocking part 224 and the second magnetic interlocking part 234 do not come into contact with each other, no wear occurs, and the system can be applied to interlocking control at higher rotation speeds, for example, 10,000 rpm.

[0036] In addition, by arranging the first transmission wheel 22, the main transmission wheel 21, and the second transmission wheel 23 along the arrangement axis L3, and by setting the shortest distance between the main magnetic interlocking portion 214 and the first magnetic interlocking portion 224 and the shortest distance between the main magnetic interlocking portion 214 and the second magnetic interlocking portion 234 to 0.5 mm, which are both substantially the same, the transmission effect can be efficiently maintained when the first transmission wheel 22 and the second transmission wheel 23 rotate in conjunction with each other in response to the rotation of the main transmission wheel 21.

[0037] In summary, the driving sensor device having a non-contact type magnetic rotary encoder unit of the present invention can achieve the effect of avoiding wear and efficiently maintaining the transmission effect by utilizing the main magnetic interlocking part 214, the first magnetic interlocking part 224 and the second magnetic interlocking part 234.

[0038] Although the embodiment of the present invention has been described above, the present invention is not limited to this, and various modifications are possible without departing from the gist of the present invention. [Explanation of symbols]

[0039] 1 Drive unit 11 Drive unit 12 Support stand 13 Drive shaft 131 Drive end 132 Connection end 14 Package Case 2. Non-contact type magnetic rotary encoder unit 21 Main transmission wheel 210 Main transmission wheel body 211 Main Feedback Section 212 Main magnetic surface 213 Main Magnetic Means 214 Main magnetic interlocking part 215 Main pole 22 First transmission wheel 220 First transmission wheel body 221 First Feedback Section 222 First Magnetic Surface 223 First magnetic means 224 First magnetic interlocking part 225 First Pole 23 Second transmission wheel 230 Second transmission wheel body 231 Second Feedback Section 232 Second Magnetic Surface 233 Second magnetic means 234 Second magnetic interlocking part 235 Second Pole 3 Sensor unit 31 Sensor board 32 Main Sensor Assembly 321 Main magnetic detection means 33 First Sensor Assembly 331 First magnetic detection means 34 Second Sensor Assembly 341 Second magnetic detection means 4 Computing Units L0 Main axis L1 First axis L2 Second axis L3 Array axis

Claims

1. A driving sensor device having a non-contact type magnetic rotary encoder unit, the driving sensor device comprising a driving unit, a non-contact type magnetic rotary encoder unit, a sensor unit and a calculation unit, The drive unit is configured to include a drive body, a support base, and a drive shaft that passes through the support base and has a drive end and a connection end opposite the drive end at both ends, and is driven to rotate by the drive body; The magnetic rotary encoder unit is configured to have a main transmission wheel arranged to wrap around the drive shaft, a first transmission wheel rotatably arranged on the support base, and a second transmission wheel rotatably arranged on the support base, and the main transmission wheel has a main transmission wheel body fixed to the connection end, a main feedback part fixed to the main transmission wheel body, and a main magnetic interlocking part fixed to the main transmission wheel body, and the first transmission wheel has a first transmission wheel body rotatably arranged on the support base, and a first feedback part fixed to the first transmission wheel body. the second transmission wheel has a second transmission wheel body rotatably arranged on the support base, a second feedback portion fixed to the second transmission wheel body, and a second magnetic interlocking portion fixed to the second transmission wheel body, and the main magnetic interlocking portion uses magnetism to move the first magnetic interlocking portion and the second magnetic interlocking portion, so that when the main transmission wheel body rotates, the first transmission wheel body and the second transmission wheel body are rotated in an interlocking manner relative to the support base, the sensor unit is configured to include a sensor substrate disposed between the main transmission wheel, the first transmission wheel, and the second transmission wheel; a main sensor assembly disposed on the sensor substrate so as to face the main feedback section, the main sensor assembly detecting a state of the main feedback section and generating a corresponding main detection signal; a first sensor assembly disposed on the sensor substrate so as to face the first feedback section, the first sensor assembly detecting a state of the first feedback section and generating a corresponding first detection signal; and a second sensor assembly disposed on the sensor substrate so as to face the second feedback section, the second sensor assembly detecting a state of the second feedback section and generating a corresponding second detection signal; the calculation unit is signal-connected to the main sensor assembly, the first sensor assembly, and the second sensor assembly, and is configured to calculate a rotation speed corresponding to the main transmission wheel body according to the main detection signal, the first detection signal, and the second detection signal; the main transmission wheel rotates about a main axis, the first transmission wheel, the main transmission wheel and the second transmission wheel are arranged at intervals along an arrangement axis perpendicular to the main axis, and the main transmission wheel is located between the first transmission wheel and the second transmission wheel; The main magnetic interlocking portion has a plurality of main magnetic poles fixedly arranged to surround the main transmission wheel body, the first magnetic interlocking portion has a plurality of first magnetic poles fixedly arranged to surround the first transmission wheel body, and the second magnetic interlocking portion has a plurality of second magnetic poles fixedly arranged to surround the second transmission wheel body, the number of the first magnetic poles being greater than the number of the main magnetic poles, and the number of the main magnetic poles being greater than the number of the second magnetic poles, The main magnetic interlocking portion, the first magnetic interlocking portion, and the second magnetic interlocking portion are all formed in a substantially circular ring shape, and each of the main magnetic poles, each of the first magnetic poles, and each of the second magnetic poles constituting the main magnetic interlocking portion, the first magnetic interlocking portion, and the second magnetic interlocking portion, respectively, has an outer circumferential surface formed in a curved surface, A driving sensor device having a non-contact type magnetic rotary encoder unit, characterized in that the shortest distance of the main magnetic interlocking portion to the first magnetic interlocking portion and the shortest distance of the main magnetic interlocking portion to the second magnetic interlocking portion are substantially the same, and the arc length of the outer circumferential surface of each of the main magnetic poles, the arc length of the outer circumferential surface of each of the first magnetic poles, and the arc length of the outer circumferential surface of each of the second magnetic poles are substantially the same.

2. 2. The drive sensor device having a non-contact type magnetic rotary encoder unit according to claim 1, wherein the first transmission wheel rotates about a first axis, the second transmission wheel rotates about a second axis, and the main axis, the first axis, and the second axis are substantially parallel to each other.

3. the main feedback section has a main magnetic surface and a main magnetic means located on the main magnetic surface, the first feedback section has a first magnetic surface and a first magnetic means located on the first magnetic surface, the second feedback section has a second magnetic surface and a second magnetic means located on the second magnetic surface, 2. A driving sensor device having a non-contact type magnetic rotary encoder unit as described in claim 1, characterized in that the main sensor assembly senses the magnetism generated by the main magnetic means to generate the main detection signal, the first sensor assembly senses the magnetism generated by the first magnetic means to generate the first detection signal, and the second sensor assembly senses the magnetism generated by the second magnetic means to generate the second detection signal.

4. the main sensor assembly has a main magnetic sensing means facing the main magnetic surface, the first sensor assembly has a first magnetic sensing means facing the first magnetic surface, and the second sensor assembly has a second magnetic sensing means facing the second magnetic surface; A driving sensor device having a non-contact type magnetic rotary encoder unit as described in claim 3, characterized in that the main magnetic detection means, the first magnetic detection means, and the second magnetic detection means are used to detect magnetic fields generated by the main magnetic means, the first magnetic means, and the second magnetic means approaching each other due to rotation, thereby converting them into the main detection signal, the first detection signal, and the second detection signal, respectively.

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