JP2005069928A - Detecting module of rotational angle and torque, and detector using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a detecting module for rotational angle and torque along with a detector using the same, capable of detecting the rotational angle and torque of a rotating shaft at the same time. <P>SOLUTION: The detecting module for rotational angle and torque comprises a first rotor 1, a second rotor 2, a torque detecting element 3 connected between the rotors 1 and 2, a plurality of detecting members 4a-4g, 5a-5g which are attached to such positions as indicate prescribed rotational angles of the first rotor 1 and the second rotor 2 for transmitting prescribed radio waves, and reading sensors 6a and 7a arranged outside the trajectory of the detecting members 4a-4g, 5a-5g for receiving the radio wave. With the reading sensors 6a and 7a as well as torque detecting parts 6b and 7b connected to the detecting module, the rotational angle is detected by the reading sensors 6a and 7a and a toque is detected from a difference between the detected rotational angles. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention is applied to a system that notifies a steering angle and a steering force of a steering wheel, and relates to a detection module for detecting a rotation angle of a rotation shaft and a torque applied to the rotation shaft, and a detection device using the detection module.

  In general, a system for notifying a steering angle and a steering force of a steering wheel is applied with a means for detecting a rotation angle of a rotating shaft and a means for detecting a torque applied to the rotating shaft.

  Conventionally, a rotary encoder has been known as a means for detecting a rotation angle, and there are an optical type and a magnetic type as an angle detection method of the rotary encoder.

  FIG. 5 is an explanatory diagram of a conventional optical rotary encoder, and FIG. 6 is an explanatory diagram of a conventional magnetic rotary encoder.

  As shown in FIG. 5, the optical rotary encoder includes, for example, a rotating shaft 51 provided with a disk 52 having slits 53 formed at a predetermined pitch in the circumferential direction, and a light emitting element 55 and a light receiving element sandwiching the trajectory of the slit 53. 56, and an incremental type (see, for example, Patent Document 1) that detects a rotation angle by counting light pulses generated according to the amount of rotation, and a plurality of slits with a binary code corresponding to the rotation angle. There is an absolute type that uses a rotating disk encoded in a row and reads the binary code to detect the rotation angle.

  Incremental type has a simple slit pattern and simple structure, so it is inexpensive in price and excellent in detecting instantaneous rotation speed. In some cases, the rotation angle cannot be accurately detected due to accumulation. For this reason, when it is necessary to accurately detect the rotation angle, there is no accumulation of miscounts in the middle, and there is no need to make the responsiveness of photoelectric elements and electric circuits a problem for high-speed rotation. A type of rotary encoder is widely used.

  Also, as shown in FIG. 6, the magnetic rotary encoder is formed by applying, plating, sputtering, or the like a magnetic film capable of magnetic recording on a disk 61 made of aluminum or a similar material interlocked with the rotating shaft 64. A bit pattern 62 is recorded on the magnetic film, and a head sensor 63 such as a Hall element or a magnetoresistive effect element is provided facing the portion on which the bit pattern is formed. Thus, the rotation angle is detected.

  This magnetic rotary encoder is relatively small and inexpensive, and has a high impact resistance due to the simple configuration of the disk 61 and the head sensor 63 (for example, Patent Document 2). reference.).

  On the other hand, a torque sensor used for electric power steering (EPS) is known as a torque detection means.

  FIG. 7 is an explanatory diagram of the principle of a conventional torque sensor.

  As shown in FIG. 7, in the conventional torque sensor, a detection ring 71 on the input shaft 70i side (upper side in the figure) and a detection ring 72 on the output shaft 70o side (lower side in this case) are formed on the respective end surfaces. The projections 73 and 74 are fixed to the torsion bar 75 so as to contact each other in the axial direction, and a detection coil 76 having a magnetic circuit is provided facing the contact portion.

  This torque sensor is formed between a detection ring 71 on the input shaft 70i side and a detection ring 72 on the output shaft 70o side that is twisted and fixed to the torsion bar 75 by the steering force when the driver steers. A relative shift due to twisting occurs. As a result, the positions of the protrusions 73 and 74 processed on the end faces of the detection rings 71 and 72 are relatively shifted, so that the magnetic resistance in the magnetic circuit of the detection coil 76 changes.

  From this change in magnetic resistance, the torsion angle of the torsion bar 75 can be known, and finally the steering force can be known. Since the magnetic resistance changes depending on the temperature of the sensor component, another detection ring 77 is provided so as to come into contact with the other end face of the detection ring 71 on the input shaft 70i side, and the contact portion is faced. A compensation coil 78 is provided to compensate for temperature changes (see, for example, Patent Document 3).

JP-A-7-43134 JP-A-9-318388 JP 2002-257651 A

  However, the steering angle and the steering force are important factors that are desired to be detected as steering information of the steering wheel, and can be measured by using different methods, but none of them can be detected by one method. Therefore, in order to detect a rotation angle and a torque, each apparatus is needed, and there existed a problem that a detection part became long or became large.

  In addition, the absolute type of an optical rotary encoder requires 9 bits even when detecting one rotation with a relatively coarse accuracy of 360 degrees, for example, so that the light emitting element 55 and the light receiving element 56 also correspond to the number of bits. 9 sets must be provided. Therefore, as the accuracy is improved, the number of the light emitting elements 55 and the light receiving elements 56 is increased, so that not only the structure is complicated and the cost is increased, but also the power consumption is increased accordingly. There was a problem that a battery had to be used.

  Further, in general, in the case of an optical rotary encoder, modulated light is emitted by a light emitting diode or laser diode, and reflected light or transmitted light is received by a photodiode or phototransistor, which is expensive and mechanical. In the past, it was impossible to produce a light and inexpensive product having high resolution and high impact resistance.

  Furthermore, the optical rotary encoder needs to keep the light receiving surface of the light receiving element 56 clean at all times, and may be difficult to use in a poor environment.

  Further, in order to increase the resolution, the magnetic rotary encoder needs to record the bit pattern 62 at a higher density. When the density is increased, the leakage magnetic flux on the surface of the magnetic film is reduced, and as a magnetic sensor. Since the improvement of the magnetic sensitivity of the Hall element and magnetoresistive effect element used has reached its limit, it is impossible to achieve higher resolution.

  As for the torque detection means, since the magnetic resistance is affected by the characteristics of the iron case material constituting the detector (component composition, composition percentage, degree of processing, etc. of the constituent raw materials), care must be taken in material management. Don't be.

  Furthermore, since an iron case will change a material characteristic if it processes, it must heat-process after a process. In addition, since the magnetic resistance is affected by the dimensional accuracy of the iron case constituting the detector, the iron case is required to have high processing accuracy.

  Furthermore, although not shown, the iron case is divided into a case body and a lid, and the gap between the case body and the lid greatly affects the magnetic resistance, so it is necessary to manage the gap when assembling the iron case. become. That is, high processing accuracy is required to process the case body and the lid.

  Accordingly, an object of the present invention is to provide a rotation angle and torque detection module capable of simultaneously detecting the rotation angle and torque of a rotating shaft and a detection device using the same.

  In order to solve the above problems, the invention of claim 1 includes a first rotating body and a second rotating body that have a circumferential surface around an axis and are provided coaxially, and the first rotating body and the second rotating body. A torque detecting element that is connected to the rotating body and causes torsion due to a difference between a rotating angle of the first rotating body and a rotating angle of the second rotating body; and the first rotating body and the second rotating body A plurality of detection bodies that are attached at positions indicating a predetermined rotation angle of the body and transmit predetermined radio waves, respectively, and receive radio waves transmitted from the detection bodies provided facing at least one detection body of each rotary body And a reading sensor unit.

  According to the configuration of the first aspect, when the first rotating body rotates, the detecting body also rotates in accordance with the rotation, so that the detecting body (number) read by the external reading sensor unit changes. The rotation angle can be obtained from the detection body (number) by associating the attachment position (angle) of the detection body with the detection body (number) in advance. Similarly, the rotation angle and torque can be detected simultaneously by determining the rotation angle of the second rotating body and determining the torque from the difference between these rotation angles.

  According to a second aspect of the invention, in addition to the configuration of the first aspect, the detector is an IC chip with an antenna having a non-volatile memory for storing non-overlapping number data to be superimposed on radio waves, and the reading sensor unit has an antenna. It has an antenna for transmitting radio waves for supplying power to the IC chip.

  According to the configuration of the second aspect, since the IC chip with an antenna records a number that does not overlap for each IC in advance, the rotation angle is detected from the received radio wave number data and is arranged outside. Since power is supplied from the read sensor unit to the IC chip with an antenna, a battery is not required for the IC chip with an antenna.

  According to a third aspect of the present invention, there are provided a first rotating body and a second rotating body having a circumferential surface around an axis and provided coaxially, and a connection between the first rotating body and the second rotating body. A torque detecting element that is twisted due to a difference between a rotation angle of the first rotating body and a rotation angle of the second rotating body, and a predetermined rotation angle of the first rotating body and the second rotating body. A plurality of detectors that are attached to the indicated positions and transmit predetermined radio waves, a reading sensor unit that faces the at least one detector of each rotating body and that receives radio waves transmitted from the detectors, and The rotation angle of the first rotating body and the second rotating body is detected from the radio wave received by the sensor unit, and the torsion angle of the torque detection element is calculated from the difference between these rotation angles, and the magnitude of the torque is calculated. And an arithmetic means for performing.

  According to the configuration of the third aspect, the rotation angle is detected from the radio wave received by the reading sensor unit, and the twist angle of the torque detection element is calculated from the difference between the rotation angles measured on both sides of the torque detection element. The magnitude of torque can be obtained by calculation from the torsional angle and eigenvalues such as material characteristics and dimensions of the torque detecting element. In addition, a system capable of transmitting and receiving data by radio waves between the detection unit and the reading sensor unit can be configured, and the data of the detection body can be acquired by the reading sensor unit without contact.

  According to a fourth aspect of the present invention, in addition to the configuration of the third aspect, the detector is an IC chip with an antenna having a non-volatile memory for storing non-overlapping number data to be superimposed on the radio wave, and the reading sensor unit has an antenna. It has an antenna for transmitting radio waves for supplying power to the IC chip.

  According to the configuration described in claim 4, since the IC chip with an antenna having a non-volatile memory is used as the detection body and power is also supplied from the reading sensor unit, a battery is unnecessary and data transfer is possible.

  According to a fifth aspect of the invention, in addition to the configuration of the fourth aspect, the reader transmits a radio wave for supplying power a plurality of times and receives a radio wave on which number data is superimposed from the detection unit, and receives the most. It has a judging means for judging that the number data is the number stored in the detecting section.

  According to the structure of Claim 5, the number of a detection body can be determined more correctly.

  According to the present invention, an excellent effect that the rotation angle of the rotating shaft and the torque applied to the rotating shaft can be detected simultaneously is exhibited.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, a preferred embodiment of the invention will be described with reference to the accompanying drawings.

  FIG. 1 (a) is a perspective view of a rotation angle and torque detection device showing an embodiment of the present invention, and FIG. 1 (b) is a side view thereof.

  As shown in FIG. 1 (a), the rotation angle and torque detection device includes a detection module for detecting respective rotation position data from detection bodies provided on two coaxial rotation bodies, and their rotations. It mainly includes torque detection units 6b and 7b that detect the rotation angle of each rotating body from the position data and detect the magnitude of torque from the difference between the rotation angles of both rotating bodies.

  That is, the detection module includes a first rotating body provided on the input side (upper side in the figure) and having a circumferential surface around the axis, for example, a first cylindrical body 1 formed on a part of the rotating shaft, and an output side. A second rotating body provided on the lower side (in this case) and having a circumferential surface around the axis, for example, a second cylindrical body 2 formed integrally with the rotating shaft, the first cylindrical body 1 and the first A main body composed of a metal torque detecting element 3 such as iron, which is connected between the two cylindrical bodies 2 and has an outer diameter smaller than the rotational axis, for example, a columnar body such as a cylinder, and a predetermined rotating body ... 4g, 5a,... 5g, each of which is attached to a position indicating the rotation angle of the sensor and transmits a predetermined radio wave, and faces the rotational trajectory of these detectors 4a,... 4g, 5a,. Sensors that respectively receive radio waves that are arranged on the transmitter and transmitted from the detector 6a, and a 7a.

  The detectors 4a,..., 4g, 5a,... 5g are appropriately positioned along a position indicating a predetermined rotation angle of the circumferential surfaces of the first cylindrical body 1 and the second cylindrical body 2, for example, along the circumferential direction of the circumferential surface. An IC chip with an antenna having a non-volatile memory for storing non-overlapping number data, which is attached to spaced positions (entire circumference or a part thereof) and superimposed on radio waves transmitted to the reading sensor units 6a and 7a. Consists of.

  The reading sensor units 6a and 7a are provided in the housings of the readers 6 and 7 together with the torque detection units 6b and 7b. Although not shown, the reading sensor units 6a and 7a transmit radio waves for supplying power to the IC chips with antennas 4a,... 4g, 5a,. A transmission / reception antenna for receiving the transmitted radio wave.

  The torque detection units 6b and 7b are electrically connected to the reading sensor units 6a and 7a, respectively, and are connected to each other by the signal line 13, and further, the radio waves received by these reading sensor units 6a and 7a. The rotation angle is detected from each of the rotation angles, the twist angle of the torque detection element 3 is calculated from the difference between the detected rotation angles, and eigenvalues such as material characteristics and dimensions of the torque detection element 3 and the twist angle thereof are calculated. And calculating means for calculating the magnitude of the torque.

  Further, the torque detectors 6b and 7b transmit the electric wave for supplying power a plurality of times, and receive the radio wave on which the number data is superimposed and transmitted via the IC chips 4a,... 4g, 5a,. , A determination means for determining that the most frequently received number data is the number stored in the IC chips with antennas 4a,... 4g, 5a,.

  Next, the operation of the rotation angle and torque detection device shown in FIGS. 1A and 1B will be described.

  Regarding the detection method of the rotation angle, the operation of the reading sensor unit 6a on the first rotating body side and the operation of the reading sensor unit 7a on the second rotating body side are the same, and therefore the reading sensor unit on the first rotating body side. Only the operation of 6a will be described.

  1 (a) and 1 (b), when the rotation shaft of the first cylindrical body 1 on the input side rotates, the IC chips with antennas 4a,. Since it rotates, the number of the IC read by the reader 6 changes by fixing the position of the reading sensor unit 6a.

  At this time, a radio wave for supplying power transmitted from the transmission / reception antenna of the reading sensor unit 6a is received by the IC chips 4a,... 4g with antennas, so that a current flows in the IC chips 4a,. Then, the number data of the IC chips 4a,..., 4g with antennas are converted into radio waves superimposed and transmitted. Then, by receiving the radio wave again with the transmission / reception antenna of the reading sensor unit 6a, the rotation angle is obtained from the difference in the received number data.

  Specifically, by associating the positions (angles) where the IC chips with antennas 4a,... 4g are attached and the numbers of the IC chips with antennas 4a,. The rotation angle can be obtained from the number recorded in the memory using the calculation means provided in the torque detectors 6b and 7b.

  Here, when an ID corresponding to the angle is attached, it is possible to display the angle as it is without converting the data in the reader 6.

  In addition, the determination means transmits a radio wave for supplying power a plurality of times, receives the radio wave superimposed with the number data transmitted through the IC chips with antennas 4a,... By determining that the numbers are stored in the IC chips with antennas 4a,... 4g, it is possible to determine the numbers of the IC chips with antennas 4a,.

  On the other hand, when a rotational force (torque) is generated on the rotation shaft, the torque detection element 3 is twisted, and a difference in the detected value of the rotation angle is generated between the first cylindrical body 1 and the second cylindrical body 2. .

  This difference in rotation angle is obtained by reading the numbers of the IC chips 4a,..., 4g, 5a,... 5g with antennas attached to the first cylindrical body 1 and the second cylindrical body 2 with the readers 6 and 7, respectively. Then, the torsion angle of the torque detection element 3 can be obtained by obtaining the difference between the angles by the calculation means. Further, the magnitude of the torque can be obtained by arithmetic processing from the torsion angle and eigenvalues such as material characteristics and dimensions of the torque detecting element 3.

  As described above, in the present embodiment, since the rotation angle detection unit and the torque detection unit are an integrated detection device, the steering angle (rotation angle) and the steering force (torque) of the steering wheel are set as one. It can be said that it is a compact detection device that can be detected simultaneously by the device.

  Further, since the torque is detected by the difference between the eigenvalues such as the material characteristics and dimensions of the torque detecting element 3 and the rotation angle of the input side rotating body and the rotation angle of the output side rotating body, the characteristics are It is hard to be influenced by the material, the material of the torque detection element 3, and the like.

  In this embodiment, since the IC chips with antennas 4a,..., 4g, 5a,... 5g are used as the detection body, there is no correlation between the size of the number to be recorded and the geometric dimension of the detection body. Even when a large number of bits are required to display the angle in order to increase the accuracy, the size of the detection body does not increase. Therefore, in order to increase the angle accuracy, it is necessary to increase the number of readers 6 and 7 only by increasing the number of bits (increasing the number of IC chips with antennas 4a,... 4g, 5a,... 5g). In addition, the structure is simple, the cost is not high, and the absolute type of rotation angle can be detected.

  Further, the IC chips with antennas 4a,..., 4g, 5a,... 5g in which absolute numbers are recorded do not require a power supply device, and their lifetime is not shortened compared to conventional optical and magnetic encoders. . For this reason, a special mechanism / function for maintaining an absolute angle even during a power failure, a backup battery, and the like are not required.

  Furthermore, in the present embodiment, since digital signals are processed from the signal detection by the reading sensor units 6a and 7a to the arithmetic processing by the arithmetic means, the reliability is high and it is difficult to be influenced by the surrounding environment such as a temperature change.

  Furthermore, since each IC chip with antenna 4a,... 4g, 5a,... 5g is assigned an independent number, the IC chips 4a with antenna 4a,. By reading, the absolute angle can be obtained. Therefore, the rotation angle error does not increase due to the influence of noise or the like.

  Further, according to the present embodiment, the correct number that eliminates the influence of noise and the like can be obtained by reading the numbers of the IC chips with antennas 4a,... 4g, 5a,.

  Furthermore, since the present embodiment detects the rotation angle by transmitting / receiving radio waves, the rotation angle and torque are detected with high accuracy even in a poor environment with high impact resistance and a lot of dust and the like. be able to.

  Next, another embodiment of the present invention will be described in detail.

  FIG. 2 (a) is a perspective view of a rotation angle and torque detection device showing another embodiment of the present invention, and FIG. 2 (b) is a side view thereof.

  The detection device shown in FIGS. 2A and 2B has the same basic configuration as the detection device shown in FIGS. 1A and 1B, but detects the rotation angle. This is a different example in that the module and the torque detector 12 that detects data by exchanging data with the detection module are separated.

  That is, in the detection apparatus shown in FIGS. 2 (a) and 2 (b), the reading sensor units 10 and 11 of the detection module are rotated by the IC chips 8a,... 8g, 9a,. The torque detector 12 is disposed outside and facing the track. The torque detector 12 is connected to the reading sensor units 10 and 11 through signal lines 10a and 11a, respectively, and is installed remotely.

  By configuring in this way, the reading sensor units 10 and 11 are very small compared to the torque detecting unit 12, so that only the reading sensor units 10 and 11 are IC chips 8a,... 8g, 9a,. It can be applied in places where the installation location is narrow.

  Moreover, Fig.3 (a) is a perspective view of the rotation angle and torque detection apparatus which shows other embodiment of this invention, FIG.3 (b) is the side view.

  The basic configuration of the detection device shown in FIGS. 3 (a) and 3 (b) is the same as that of the detection device shown in FIGS. 1 (a) and 1 (b), but the IC chip 4a with antenna, .. 4g, 5a,... 5g are different in that they are attached to the circumferential surfaces of the disks 21 and 22 provided on the rotating shaft instead of the cylindrical body.

  That is, the detection module has a metal torque detection element 23 such as iron formed in a columnar shape such as a column whose outer diameter is smaller than the rotation axis, and the coaxial input side (see FIG. In this case, the first disk 21 connected to the upper side and having a circumferential surface around the axis, and the coaxial sensing output side (in this case, the lower side) with the torque detection element 23 interposed therebetween, the circumferential surface around the axis. And a second disk 22 having a main body.

  Then, predetermined radio waves are transmitted to positions indicating predetermined rotation angles of the circumferential surfaces of the first disk 21 and the second disk 22, for example, positions appropriately spaced along the circumferential direction of the circumferential surface. A plurality of IC chips with antennas 4a,... 4g, 5a,.

  By configuring like the detection device shown in FIGS. 3A and 3B, the same effect as that of the detection device shown in FIGS. The present invention can also be applied to a case where the shaft has a small diameter and it is difficult to directly attach the IC chips with antennas 4a,... 4g, 5a,.

  FIG. 4 (a) is a perspective view of a rotation angle and torque detection device showing another embodiment of the present invention, and FIG. 4 (b) is a side view thereof.

  The basic configuration of the detection device shown in FIGS. 4 (a) and 4 (b) is the same as that of the detection device shown in FIGS. 2 (a) and 2 (b), but the IC chip with antenna 8a, ... 8g, 9a, ... 9g are different examples in that they are attached to the circumferential surfaces of the disks 21, 22 provided on the rotating shaft instead of the cylindrical body.

  That is, the detection module has a metal torque detection element 23 such as iron formed in a columnar shape such as a column whose outer diameter is smaller than the rotation axis, and the coaxial input side (see FIG. In this case, the first disk 21 connected to the upper side and having a circumferential surface around the axis, and the coaxial sensing output side (in this case, the lower side) with the torque detection element 23 interposed therebetween, the circumferential surface around the axis. And a second disk 22 having a main body.

  Then, predetermined radio waves are transmitted to positions indicating predetermined rotation angles of the circumferential surfaces of the first disk 21 and the second disk 22, for example, positions appropriately spaced along the circumferential direction of the circumferential surface. A plurality of IC chips with antennas 8a,... 8g, 9a,.

  By configuring like the detection device shown in FIGS. 4 (a) and 4 (b), the same effect as the detection device shown in FIGS. 2 (a) and 2 (b) can be obtained and rotated. The present invention can also be applied to a case where the shaft has a small diameter and it is difficult to directly attach the IC chips 8a,... 8g, 9a,.

  As another embodiment other than those described above, the detection body may be provided on the peripheral edge of the end surfaces of the cylindrical bodies 1 and 2, and provided on the peripheral edge of the upper surface or the lower surface of the disks 21 and 22. May be.

  As mentioned above, it cannot be overemphasized that embodiment of this invention is not limited to embodiment mentioned above, and various things are assumed in addition.

FIG. 1 (a) is a perspective view of a rotation angle and torque detection device showing an embodiment of the present invention, and FIG. 1 (b) is a side view of FIG. 1 (a). FIG. 2 (a) is a perspective view of a rotation angle and torque detection device showing another embodiment of the present invention, and FIG. 2 (b) is a side view of FIG. 2 (a). FIG. 3 (a) is a perspective view of a rotation angle and torque detection device showing another embodiment of the present invention, and FIG. 3 (b) is a side view of FIG. 3 (a). FIG. 4 (a) is a perspective view of a rotation angle and torque detection device showing another embodiment of the present invention, and FIG. 4 (b) is a side view of FIG. 4 (a). It is explanatory drawing of the conventional optical rotary encoder. It is explanatory drawing of the conventional magnetic type rotary encoder. It is principle explanatory drawing of the conventional torque sensor.

Explanation of symbols

1 1st cylinder (rotating shaft)
2 Second cylinder (rotary axis)
3 Torque detection element 4a, ... 4g IC chip with antenna (detector)
5a, ... 5g IC chip with antenna (detector)
6a, 7a Reading sensor part 6b, 7b Torque detection part

Claims (5)

  The first rotating body and the second rotating body, which have a circumferential surface around the axis and are provided coaxially, and are connected between the first rotating body and the second rotating body. A torque detecting element that is twisted due to a difference between a rotation angle of the rotating body of the first rotating body and a rotation angle of the second rotating body, and a position that indicates a predetermined rotating angle of the first rotating body and the second rotating body. A plurality of detectors each transmitting a predetermined radio wave, and a reading sensor unit provided facing at least one detector of each rotating body and receiving each radio wave transmitted from the detector. Rotation angle and torque detection module.   The detection body is an IC chip with an antenna having a nonvolatile memory for storing non-overlapping number data to be superimposed on the radio wave, and the reading sensor unit transmits a radio wave for supplying power to the IC chip with an antenna. The rotation angle and torque detection module according to claim 1, further comprising an antenna.   The first rotating body and the second rotating body, which have a circumferential surface around the axis and are provided coaxially, and are connected between the first rotating body and the second rotating body. A torque detecting element that is twisted due to a difference between a rotation angle of the rotating body of the first rotating body and a rotation angle of the second rotating body, and a position that indicates a predetermined rotating angle of the first rotating body and the second rotating body. A plurality of detection bodies each transmitting a predetermined radio wave, a reading sensor unit provided facing at least one detection body of each rotating body and receiving a radio wave transmitted from the detection body, and the reading sensor unit The rotation angles of the first rotating body and the second rotating body are detected from the received radio wave, and the torsion angle of the torque detecting element is calculated from the difference between the rotation angles, and the magnitude of the torque is calculated. Characterized by comprising computing means Detector of the rotation angle and torque.   The detection body is an IC chip with an antenna having a nonvolatile memory for storing non-overlapping number data to be superimposed on the radio wave, and the reading sensor unit transmits a radio wave for supplying power to the IC chip with an antenna. The rotation angle and torque detection device according to claim 3, further comprising an antenna. The torque detection unit transmits the radio wave supplying the power a plurality of times, receives the radio wave on which the number data is superimposed from the detection unit, and receives the most received number data with the number stored in the detection unit. The rotation angle and torque detection device according to claim 4, further comprising determination means for determining that there is a rotation angle.

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