JP2023088659A - Torque sensor and automobile testing device using the same - Google Patents

Abstract

To provide a torque sensor which can be prevented from being broken and in which the shapes and installation places of an electric power receiving coil and an electric power transmitting coil are not limited, and an automobile testing device using the torque sensor.SOLUTION: The torque sensor comprises: a torque sensor main body 102 with a strain gauge 101 for torque measurement; a shaft connection portion 103 which is provided in one side surface of the torque sensor main body 102; a fitting flange 104 which is provided on the side opposite to the shaft connection portion 103; and an electric power receiving coil 105 which is provided in the fitting flange 104 and feeds electric power to the strain gauge 101 for torque measurement. The torque sensor further comprises: a flexible cable 108 connecting the strain gauge 101 for torque measurement and the electric power receiving coil 105 to each other; an electric power transmitting coil 106 which is arranged facing the electric power receiving coil 105 and supplies electric power to the electric power receiving coil 105 without contacting the electric power receiving coil 105; and a support member supporting the electric power transmitting coil 106 at a position facing the outer surface of the fitting flange 104.SELECTED DRAWING: Figure 3

Description

The present invention relates to a torque sensor and an automobile testing apparatus using the same.

2. Description of the Related Art Conventionally, automobile test equipment has been used for research and development, design, quality control, and the like of automobiles. Along with recent technological progress, the automobile industry is advancing toward higher performance and higher functionality of automobiles, and in response to this, improvements in the measurement accuracy of automobile test equipment are being demanded.

There are various types of automobile test equipment according to the contents of the test. As one of them, for example, as shown in Patent Document 1, there is a device that measures the torque of an axle while absorbing the power transmitted to the axle with a braking device. In this type of automobile testing apparatus, a simulated wheel is attached to the axle of an automobile to be measured, and the simulated wheel and a dynamometer, which is a drive absorption source provided outside the vehicle, are connected via a constant velocity joint or the like. A dynamometer then applies a load to the axle and measures the torque applied to the axle of the vehicle.

In addition, as shown in FIG. 4 of Patent Document 1, a device that measures torque in a state in which an axle and an output shaft of a dynamometer are connected without using a simulated wheel and the connecting portion is supported by bearings is also proposed. It is

In these test devices, a strain-prone portion (called a strain-generating portion) is formed between the axle and the dynamometer, and strain gauges are placed in that portion to form a resistance bridge circuit. When a rotational force is applied to the dynamometer from the axle, the magnitude of the shear stress generated on the surface of the strain-generating portion due to the torque applied to the strain-generating portion is detected by the strain gauge, and the output voltage of the resistance bridge circuit is measured. Convert the change into torque.

When performing torque detection as described above, the problem is the power supply to electronic components such as strain gauges and circuits connected to them. Since these electronic components are provided in the simulated wheel portion and the connecting member portion that rotate together with the axle, it is necessary to supply electric power for the operation of each electronic component arranged in the rotating portion. Therefore, in the conventional technology, a coil-shaped receiving antenna is provided on the rotating electronic component side, and a transmitting antenna connected to an external power supply is provided on the stationary part of the device, and wireless power is supplied between the transmitting antenna and the receiving antenna. . In addition, the torque data obtained by the strain gauge and the resistance bridge circuit is transmitted to the receiver on the fixed side by the transmitter on the rotating side. Also, the power obtained by the receiving antenna is used.

Japanese Patent No. 6656904

In order to efficiently perform wireless power supply as described above, it is necessary to accurately position the fixed-side power transmitting coil and the rotating-side receiving coil. That is, the efficiency of wireless power supply depends on the allowable misalignment of the specimen, the axle, the output shaft of the dynamometer, or the simulated wheel or connecting member. For example, in the automobile test apparatus of Patent Document 1, since the simulated wheel and the mounting portion of the dynamometer are attached to the hub so as to cover the torque sensor, misalignment of the transmitting antenna and the receiving antenna caused by the behavior of the vehicle during the test , or the transmitting antenna may come into contact with a rotating member (for example, a flange provided with a receiving antenna), which may damage the transmitting antenna or the torque sensor. In Patent Document 1, a jack or the like is used to hold the vehicle body in order to prevent damage to the torque sensor, but this cannot accurately measure the torque applied to the axle.

SUMMARY OF THE INVENTION The present invention has been proposed to solve the problems of the prior art as described above. SUMMARY OF THE INVENTION An object of the present invention is to provide a torque sensor that can prevent damage to the torque sensor and is not limited to the shape and installation location of the power receiving coil and the power transmitting coil, and an automobile testing apparatus using the same.

A torque sensor and an automobile testing apparatus using the same according to the present invention are characterized by having the following configuration.
(1) A torque sensor main body having a strain gauge for torque measurement.
(2) A shaft connecting portion provided on one side surface of the torque sensor main body.
(3) A mounting flange provided on the surface opposite to the shaft connecting portion.
(4) A power-receiving coil provided in a part of the torque sensor and supplying electric power to the torque-measuring strain gauge.
(5) A power transmission section that connects the strain gauge for torque measurement and the power receiving coil.
(6) A power transmitting coil arranged to face the power receiving coil and supplying power to the power receiving coil without contact with the power receiving coil.
(7) A support member that supports the power transmission coil at a position facing the outer surface of the mounting flange.

In the present invention, it is also possible to employ configurations such as the following (1) to (7).
(1) The power receiving coil directly feeds the power supplied from the power transmitting coil to the torque measuring strain gauge.

(2) A part of the torque sensor is provided with a power source independent of the power receiving coil, and power from the power source is supplied to the torque measuring strain gauge.

(3) A power source connected to the power receiving coil is provided as part of the torque sensor, and power supplied from the power receiving coil is fed to the torque measuring strain gauge via the power source.

(4) The power source is a secondary battery or capacitor charged by the power receiving coil.

(5) At least part of the power receiving coil is provided on the outer surface of the mounting flange, which is a surface orthogonal to the rotation axis direction.

(6) The power transmission coil supplies electric power by wireless power supply of the vehicle.

(7) An electronic device including the torque measuring strain gauge provided in the torque sensor main body and a data collection/analysis device provided outside the torque sensor main body are connected by wireless communication, and the torque sensor main body is connected by wireless communication. Power for wireless communication is power supplied from the power receiving coil and/or the power supply.

According to the present invention, since the power transmission coil is provided on the support member that supports the power transmission coil at a fixed position away from the mounting flange, the shapes and installation locations of the power reception coil and the power transmission coil are not limited. In addition, it is possible to reduce the man-hours for assembling the power receiving coil and the power transmitting coil. Furthermore, it is possible to provide a torque sensor that can prevent damage to the torque sensor due to misalignment caused by vehicle behavior during testing and can accurately measure the torque output from the axle.

BRIEF DESCRIPTION OF THE DRAWINGS It is the whole block diagram which shows the use condition of 1st Embodiment, (a) is a front view, (b) is a top view. It is a perspective view which shows the whole structure of a 1st form. It is an exploded perspective view showing the whole composition of a 1st embodiment. It is a perspective view which shows the whole structure of 2nd Embodiment. It is an exploded perspective view showing the whole composition of a 2nd embodiment. 2 is a block circuit diagram of the torque sensor of the first embodiment; FIG.

[1. First Embodiment]
[1-1. composition]
The torque sensor 100 of the first embodiment will be described below. FIGS. 1(a) and 1(b) show an automobile testing apparatus 200 using a torque sensor 100 (hereinafter referred to as testing apparatus 200). The test apparatus 200 has a torque sensor 100 , an axle 2 of an automobile 1 to be tested, a dynamometer 3 that applies a rotational force to the axle 2 , an output shaft 4 of the dynamometer 3 , and bearings 5 .

In FIG. 1(b), the test device 200 is provided on the front wheels of the automobile 1, but it may be provided on all the wheels or any wheel desired to be measured depending on the purpose of the test. Moreover, the bearing 5 rotatably supports the axle 2, and may be a simulated wheel simulating an actual wheel, or may be an intermediate bearing state in which an actual tire is not mounted. The bearing 5 of this embodiment is in an intermediate bearing state, and uses a bearing support portion 6 in which a substantially L-shaped member is provided on a mount.

As shown in FIGS. 2 and 3, the torque sensor 100 includes a torque sensor main body 102 having a torque measuring strain gauge 101, a shaft connecting portion 103, a mounting flange 104, a receiving coil 105, a transmitting coil 106, and a flexible cable 108. Prepare. The torque sensor main body 102 has a disc shape, and includes an electronic device such as a torque detection unit (not shown) and a circuit inside. A plurality of torque measuring strain gauges 101 are attached to the surface of the torque sensor main body 102 at regular intervals. A side surface of the torque sensor main body 102 on the axle 2 side is a shaft connecting portion 103, and an end portion of the axle 2 is connected and fixed to the shaft connecting portion 103 via a rotation shaft 52, which will be described later.

A bearing 51 is provided inside the bearing 5 , and a rotary shaft 52 is rotatably supported in the bearing 5 . A flange 2a provided at the end of the axle 2 is connected and fixed to the end face of the rotary shaft 52 projecting from the bearing 5 toward the vehicle body. A flange 52a is provided at the end of the rotating shaft 52 on the side of the torque sensor main body 102. By fixing the flange 52a to the shaft connecting portion 103 of the torque sensor main body 102, the axle 2 and the torque sensor main body 102 are integrated. concatenated. A mounting flange 104 is fixed to the surface of the torque sensor main body 102 opposite to the shaft connecting portion 103 , and this mounting flange 104 is connected to the output shaft connecting flange 41 fixed to the end portion of the output shaft 4 of the dynamometer 3 . Fixed.

A receiving coil 105 for power supply is provided on the mounting flange 104 . At least part of power receiving coil 105 is provided on the outer surface of mounting flange 104 on the dynamometer 3 side. A part or all of the receiving coil 105 may be provided inside the mounting flange 104 or on the outer surface of the torque sensor main body 102 side. The outer surface on the side of the dynamometer 3 close to the power transmission coil 106 is preferable. In this specification, the surface perpendicular to the rotation axis direction of the rotation shaft 52 is referred to as an outer surface, and the radially outer side of the rotation shaft 52 is referred to as a circumferential surface. Including both lateral and circumferential surfaces.

Between the power receiving coil 105 and the torque sensor main body 102 is a power transmission section that feeds the power excited by the power receiving coil 105 to the torque measuring strain gauge 101, an electronic circuit, a data transmission device, etc. that constitute the torque sensor. A flexible cable 108 is provided. That is, in the exploded view of FIG. 3, the flexible cable 108 is shown separated from the torque sensor body 102, but in reality, one end of the flexible cable 108 is fixed to the torque sensor body 102, and the electric circuit and components of the torque sensor body 102 are connected. It is connected to the. The other end of flexible cable 108 is fixed to the outer surface of mounting flange 104 via the outer peripheral end surface of mounting flange 104 and connected to power receiving coil 105 . In this embodiment, the flexible cable 108 is used as the power transmission unit, but the power transmission unit can exchange power between the power receiving coil 105, the strain gauge for torque measurement 101, an electronic circuit, a data transmission device, and the like. If so, a flat cable, a power supply fitting, or other well-known materials can be used regardless of their shape.

Torque sensor main body 102 is provided with a wireless device (not shown) that transmits measured torque data to a receiving device outside torque sensor 100 . As this wireless device, a conventionally known low-power wireless device such as Bluetooth (registered trademark), Wi-Fi (registered trademark), infrared communication, or the like can be used.

The power transmission coil 106 is arranged in a fixed portion of the test apparatus 200 so as to face the power reception coil 105 . That is, as shown in FIG. 2, the bearing 5 is fixed to the floor surface of the installation location of the testing device by the bearing support portion 6 . An L-shaped bracket 61 and a box-shaped case 62 are fixed to a portion of the bearing support portion 6 , and the power transmission coil 106 is supported by the bracket 61 and the case 62 . The case 62 incorporates electronic devices and circuits necessary for supplying power from an external power source to the power transmission coil 106 , and also serves as a support member for the power transmission coil 106 .

In this embodiment, the power transmission coil 106 is housed inside an L-shaped case as a whole, and is provided at a position slightly spaced apart from the outer surface of the mounting flange 104 on the dynamometer 3 side without contact. As for the position of the mounting flange 104 in the radial direction, the power transmission coil 106 is provided at a position that faces part of the trajectory of the power reception coil 105 when the torque sensor main body 102 rotates.

FIG. 6 is a block circuit diagram of this embodiment having the configuration described above. In this embodiment, the power transmission coil 106 is powered by the external power supply 301, and supplies the power to the power reception coil 105 on the mounting flange 104 side by wireless power supply. The electric power obtained by the power receiving coil 105 is sent to electronic devices such as the strain gauge 101 for torque measurement provided in the torque sensor body 102 and the circuit 303 via the flexible cable 108 . In this case, the power of the power receiving coil 105 may be directly supplied to the electronic device and circuit 303, but in this embodiment, the power of the power receiving coil 105 is charged to the secondary battery or capacitor 302, and the secondary battery or capacitor 302 The electric device and circuit 303 are driven by the discharge from the .

That is, in this embodiment, since the power receiving coil 105 is provided on a part of the outer surface of the mounting flange, the power receiving coil 105 repeatedly passes through the power transmitting coil 106 as the torque sensor main body 102 rotates. The power generated in the receiving coil 105 also has an intermittent output waveform. By temporarily storing power having such an intermittent output waveform in the secondary battery or capacitor 302 and discharging it, the electronic device and circuit 303 are supplied with smoothed power suitable for their operation.

In addition, the torque sensor main body 102 is provided with an independent power supply 304 such as a dry battery or a button battery separately from the wireless power supply, and when wireless power supply is not performed, that is, when the rotation of the axle 2 or the output shaft 4 is stopped. Then, power is supplied from this independent power source 304 to the electronic device and circuit 303 .

On the other hand, the torque measurement data obtained from the torque measurement strain gauge 101 included in the electronic device and circuit 303 is sent to the data collection/analysis device 307 by wireless communication using the transmitter 305 and the receiver 306, and data analysis and Saved. In this case, driving power for the torque measuring strain gauge 101 and the transmitter 305 is also supplied from the receiving coil 105 and the secondary battery or capacitor 302 and/or the independent power supply 304 .

[1-2. action]
In the test apparatus 200 using the torque sensor 100, as shown in FIG. 1, in the case of a bench test, which is a test in which the automobile 1 is held at the same place, the tires and wheels of the automobile 1 to be measured are removed, and the axle is 2 is fixed to the bearing 5; In order to receive torque data from the torque sensor main body 102, a receiving antenna (not shown) is connected to an external receiving device via a signal line. A data collecting/analyzing device 307 for measuring, collecting and/or analyzing the torque output from the axle 2 of the automobile 1 from the received strain amount is connected to the external receiving device.

When the automobile 1 is driven and a test including torque measurement is started, the rotating shaft 52 connected to the axle 2 of the automobile 1 rotates, but the bearing 5 fixed via the bearing 51 does not rotate, and the automobile 1 remains in place. At the same time, the rotating shaft 52 is fixed to the torque sensor main body 102 via the shaft connecting portion 103, and the torque sensor main body 102 is fixed to the output shaft 4 of the dynamometer 3 via the mounting flange 104. Therefore, the torque sensor main body 102, the output shaft 4 and the dynamometer 3 also rotate.

When a power supply line is connected to the power transmission coil 106 and power is supplied from the outside, a magnetic field is generated around the power transmission coil 106. Since the mounting flange 104 also rotates as the automobile 1 starts to operate, the power receiving coil fixed to the mounting flange 104 105 intersects the magnetic field of the transmitting coil 106 . As a result, electric power is generated in the receiving coil 105, and the electric power is supplied via the flexible cable 108 to the torque measuring strain gauge 101 provided in the torque sensor main body 102 and other electronic devices and circuits.

When a load is applied to the rotary shaft 52 from the dynamometer 3 through the output shaft 4 in such a state, the torque sensor main body 102 is distorted according to the torque output from the axle 2 of the automobile 1 . This strain is detected by the torque measuring strain gauge 101 to which power is supplied from the receiving coil 105 and electronic devices and circuits connected thereto. The detected strain amount is similarly sent to the receiving device via a transmitting antenna, a receiving antenna and a signal line (not shown) fed from the power receiving coil 105 . A data collecting/analyzing device 307 connected to the receiving device measures, collects, and/or analyzes the torque output from the axle 2 of the automobile 1 based on the amount of strain received by the receiving device.

[1-3. effect]
The effects of this embodiment having the configuration and action as described above are as follows.

(1) Since the power transmission coil 106 was provided at a position away from the surface of the mounting flange 104 by a supporting member such as the bracket 61 and the box-shaped case 62 fixed to the installation position of the test apparatus 200, the power transmission coil 105 and the power transmission coil 106 The shape and installation location of the coil 106 are not limited. That is, since the outer surface of the mounting flange 104 has a wider area than the circumferential surface of the flange, there is a large degree of freedom in the installation location of the power transmission coil 106 arranged opposite to the flange, and the power transmission coil 106 is reliably supported. You can freely select the installation location where you can

(2) The power receiving coil 105 and the power transmitting coil 106 are non-contact, and are spaced apart at positions facing each other. Therefore, the allowable range of misalignment is increased, and damage to the torque sensor 100 due to misalignment caused by vehicle behavior during testing can be prevented, and the torque output from the axle can be accurately measured.

(3) The receiving coil 105 is provided on the mounting flange 104, and the transmitting coil 106 is provided inside the L-shaped case. Since the receiving coil 105 and the transmitting coil 106 can be easily arranged with such a simple shape, the number of assembly man-hours and the manufacturing cost can be reduced.

(4) Since the power receiving coil 105 directly feeds the power supplied from the power transmitting coil 106 to the torque measuring strain gauge 101, a separate battery or the like is not required for direct power feeding, and the structure is simple.

(5) At least part of power receiving coil 105 is fixed to the outer surface of mounting flange 104 by flexible cable 108 . Therefore, compared to the case where the power receiving coil 105 and the power transmitting coil 106 are provided in the torque sensor main body 102 portion, the installation distance between the power receiving coil 105 and the power transmitting coil 106 can be shortened, and attenuation of the magnetic field by the mounting flange 104 is prevented. It is possible to suppress a decrease in transmission efficiency due to the separation of 106 .

(6) Power receiving coil 105 is provided on a portion of mounting flange 104, and power transmitting coil 106 is provided at a position facing a portion of the trajectory of power receiving coil 105 when power receiving coil 105 rotates. Therefore, the size of the receiving coil 105 and the transmitting coil 106 can be made compact while maintaining a uniform clearance with respect to the rotating body.

(7) The bearing 5 of the present embodiment is in an intermediate bearing state, and uses a bearing support portion 6 in which a substantially L-shaped member is provided on a mount. Therefore, misalignment is suppressed by firmly fixing the axle 2 and the output shaft 4 to the bearing 5, and coupled with providing the power transmission coil 106 at a position away from the surface of the mounting flange 104, the torque sensor 100 is more likely to be damaged. can be prevented, and the torque output from the axle can be accurately measured.

(8) When the secondary battery or the capacitor 302 is charged with the power of the power receiving coil 105 and the electric device and the circuit 303 are driven by the discharge from the secondary battery or the capacitor 302, the power generated in the power receiving coil 105 is Electronics and circuits 303 can be supplied with smoothed power suitable for their operation, even those with intermittent output waveforms.

(9) A part of the torque sensor 100 is provided with an independent power supply 304 such as a dry battery or a button battery in addition to the wireless power supply. It is possible to check the operation of the electronic device and the circuit 303 with electric power from the power supply, and it is possible to measure the torque and output an alarm even when the wireless power supply malfunctions.

[2. Second Embodiment]
In the second embodiment, as shown in FIGS. 4 and 5, a simulated wheel having a real tire mounted on the bearing 5 is used, and the power transmission coil 106 is arranged on the circumferential surface of the rotating body. Since the basic configuration of the second embodiment is the same as that of the first embodiment, only different parts will be described.

In the second embodiment, a tire 7 and a wheel 8 are used instead of the bearing support portion 6 of the first embodiment, and the bearing 5 is fixed to the inner circumference of the wheel 8 . Also, the power transmitting coil 106 is arranged to face the power receiving coil 105 provided on the circumferential surface of the mounting flange 104 . That is, as shown in the exploded perspective view of FIG. 5, the flat flexible cable 108 is arranged to connect between the torque sensor main body 102 and the circumferential surface of the mounting flange 104, and the rectangular flexible cable 108 is mounted. A circular power receiving coil 105 is provided at the end on the flange 104 side so that the power receiving coil 105 is arranged on the circumferential surface of the mounting flange 104 .

The power transmission coil 106 is provided in a substantially triangular case-shaped member having one side formed in a 1/4 arc shape along the circumferential surface of the mounting flange 104 . By providing power transmitting coil 106 along the outer surface of mounting flange 104 in this manner, power transmitting coil 106 is arranged at a position facing the trajectory of power receiving coil 105 when power receiving coil 105 rotates. Regarding the configuration for supporting the power transmission coil 106, a frame (not shown) is provided on the floor on which the test apparatus 200 is installed, and supporting members such as a bracket 61 (not shown) and a box-shaped case 62 are fixed there. , the power transmission coil 106 may be supported by them, or a support member such as a bracket 61 (not shown) and a box-shaped case 62 may be fixed to the dynamometer 3 and the power transmission coil 106 may be supported by them. . Moreover, the power transmission coil 106 may be supported by a fixed member such as the wheel 8 of the simulated wheel, and the shape and installation location of the supporting member are not limited.

The effects of the second embodiment having such a configuration are as follows.

(1) Power transmitting coil 106 is arranged along the circumferential surface of mounting flange 104, and power receiving coil 105 is also arranged on the circumferential surface of mounting flange 104, so that power transmitting coil 106 and power receiving coil 105 are arranged along the mounting flange 104. It is not located on the surface of 104. As a result, when fixing the output shaft 4 of the dynamometer 3 to the surface of the mounting flange 104, a sufficient space for fixing the flange on the output shaft 4 side can be secured, and the member for wireless power supply is the torque sensor main body. It does not interfere with the connection between 102 and other members.

(2) The power transmitting coil 106 is arranged to face the power receiving coil 105 provided on the mounting flange 104 along the circumferential surface thereof. Therefore, the coil shape and installation location are not limited, and the degree of freedom in installation is increased.

(3) The power transmission coil 106 is provided on a substantially triangular member having one side formed in a 1/4 arc shape. Therefore, it can be easily installed with a magnetic stand or the like, and the manufacturing cost can be reduced.

[3. Other embodiments]
While embodiments including variations have been described, these embodiments are provided by way of example and are not intended to limit the scope of the invention. These embodiments can be implemented in various other forms, and various omissions, replacements, and modifications can be made without departing from the scope of the invention. These embodiments and their modifications are included in the scope and spirit of the invention, as well as the scope of the invention described in the claims and equivalents thereof. Below is an example.

(1) In the illustrated embodiment, the mounting flange 104 is provided on the dynamometer 3 side, but it may be provided on the axle 2 side. Moreover, although the torque measurement between the axle 2 and the dynamometer 3 in the test device 200 is taken as an example, the torque measurement of other parts of the test device 200 and the torque measurement other than the test device 200 can also be used.

(2) Although the power transmission coil 106 is connected to a power supply line and supplied with power from an external power supply, power may be supplied from a power supply terminal such as a battery of the automobile 1 or a cigarette lighter socket. If it is a simple power test that does not take into consideration the fuel consumption and the engine load due to power generation, there is no problem in the test result even if the electric power is supplied from the automobile 1 . Such a configuration eliminates the need to secure an external power source for the power transmission coil 106 from the data collection/analysis device 307 side, and simplifies power supply to the power transmission coil 106 .

(3) The shape of the power transmission coil 106 is not limited to those described in the first embodiment and the second embodiment, and may be square, round, semicircular, cylindrical, ring-shaped, all or part thereof, and the like. , various shapes can be used. The power transmitting coil 106 may be installed anywhere outside the rotating body as long as the distance between the power receiving coil 105 and the power transmitting coil 106 can ensure the transmission efficiency. Moreover, by providing a plurality of sets of power receiving coils 105 and flexible cables 108, the number of power receiving coils 105 passing through the power transmitting coils 106 can be increased to increase the power supplied by wireless power supply.

Reference Signs List 1 Automobile 2 Axle 2a Flange 3 Dynamometer 4 Output shaft 41 Output shaft connecting flange 5 Bearing 51 Bearing 52 Rotary shaft 52a Flange 6 Bearing support 61 Bracket 62 Case 7 Tire 8 Wheel 100 Torque sensor 101 Torque measuring strain gauge 102 Torque sensor main body 103 Shaft connecting portion 104 Mounting flange 105 Power receiving coil 106 Power transmitting coil 108 Flexible cable 200 Automotive testing device 301 External power supply 302... Secondary battery or capacitor 303... Electronic device and circuit 304... Independent power supply 305... Transmitter 306... Receiver 307... Data collecting/analyzing device

Claims (9)

a torque sensor body equipped with a strain gauge for torque measurement;
a shaft connecting portion provided on one side surface of the torque sensor body;
a mounting flange provided on a surface opposite to the shaft connecting portion;
a power receiving coil provided in a part of the torque sensor and supplying electric power to the torque measuring strain gauge;
a power transmission unit that connects the strain gauge for torque measurement and the power receiving coil;
a power transmitting coil arranged to face the power receiving coil and supplying power to the power receiving coil in a non-contact manner with the power receiving coil;
a support member that supports the power transmission coil at a position facing the outer surface of the mounting flange;
A torque sensor comprising: 2. The torque sensor according to claim 1, wherein the power receiving coil directly feeds the power supplied from the power transmitting coil to the torque measuring strain gauge. 3. The torque sensor according to claim 1, wherein a part of said torque sensor is provided with a power source independent of said power receiving coil, and power from said power source is supplied to said strain gauge for torque measurement. 3. The torque sensor according to claim 1, further comprising a power supply connected to said power receiving coil as a part of said torque sensor, and power supplied from said power receiving coil being supplied to said torque measuring strain gauge via said power supply. torque sensor. 5. The torque sensor according to claim 4, wherein said power source is a secondary battery or capacitor charged by said receiving coil. 6. The torque sensor according to any one of claims 1 to 5, wherein at least a portion of the power receiving coil is provided on an outer surface of the mounting flange that is perpendicular to the rotational axis direction. 7. The torque sensor according to any one of claims 1 to 6, wherein the power transmission coil is supplied with power by wireless power supply of a vehicle. An electronic device including the torque measuring strain gauge provided in the torque sensor body and a data collection/analysis device provided outside the torque sensor body are connected by wireless communication, and the torque sensor body is used for wireless communication. is the power supplied from the power receiving coil and/or the power supply. An automobile test apparatus using the torque sensor according to any one of claims 1 to 8.

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