KR200154795Y1 - Torque sensor for a vehicle - Google Patents
Torque sensor for a vehicle Download PDFInfo
- Publication number
- KR200154795Y1 KR200154795Y1 KR2019970013197U KR19970013197U KR200154795Y1 KR 200154795 Y1 KR200154795 Y1 KR 200154795Y1 KR 2019970013197 U KR2019970013197 U KR 2019970013197U KR 19970013197 U KR19970013197 U KR 19970013197U KR 200154795 Y1 KR200154795 Y1 KR 200154795Y1
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- South Korea
- Prior art keywords
- detection ring
- detection
- torque sensor
- wheel
- coil
- Prior art date
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/14—Measuring force or stress, in general by measuring variations in capacitance or inductance of electrical elements, e.g. by measuring variations of frequency of electrical oscillators
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D6/00—Arrangements for automatically controlling steering depending on driving conditions sensed and responded to, e.g. control circuits
- B62D6/08—Arrangements for automatically controlling steering depending on driving conditions sensed and responded to, e.g. control circuits responsive only to driver input torque
- B62D6/10—Arrangements for automatically controlling steering depending on driving conditions sensed and responded to, e.g. control circuits responsive only to driver input torque characterised by means for sensing or determining torque
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/22—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring the force applied to control members, e.g. control members of vehicles, triggers
- G01L5/221—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring the force applied to control members, e.g. control members of vehicles, triggers to steering wheels, e.g. for power assisted steering
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
- B60Y2400/00—Special features of vehicle units
- B60Y2400/30—Sensors
- B60Y2400/307—Torque sensors
Abstract
본 고안은 자동차의 토오크 센서의 치차를 삼각톱니형으로 개선하여 에어갭(Airgap)에 따른 인덕턴스 변화를 이용함으로써 조향핸들과 조향각도와 바퀴의 조향각도사이의 편차를 측정하여 보상하여 줄 수 있도록 한 자동차용 토오크 센서에 관한 것으로, 검출링의 치차를 삼각톱니파 형태로 구성하여 외부 토크양에 따라 에어갭이 좁아졌다 멀어졌다하면서 검출코일의 인덕턴스를 변화시키도록 한 것이다.The present invention improves the gear of the torque sensor of the car to a triangular tooth type and uses the inductance change according to the air gap to measure and compensate the deviation between the steering wheel and the steering angle and the steering angle of the wheel. It relates to a torque sensor for use, and the gear of the detection ring is configured in the form of a triangle sawtooth wave to change the inductance of the detection coil while the air gap is narrowed and moved according to the external torque.
Description
본 고안은 자동차에 관한 것으로, 특히 톱니형의 토오크 센서를 삼각톱니형으로 개선하여 에어갭(Airgap)에 따른 인덕턴스 변화를 이용함으로써 조향핸들의 조향각도와 바퀴의 조향각도사이의 편차를 측정하여 보상하여 줄 수 있도록 한 자동차용 토오크 센서에 관한 것이다.The present invention relates to an automobile, and in particular, the torque sensor of the toothed type is improved to a triangular toothed type to compensate for by measuring the deviation between the steering angle of the steering wheel and the steering angle of the wheel by using the inductance change according to the air gap. The present invention relates to a torque sensor for a vehicle that can be provided.
일반적으로 자동차는 주행중 또는 정지시에 조향핸들을 회전시킴에 따라 노면과 접촉하고 있는 바퀴도 회전하여 조향되는데, 바퀴와 노면사이에는 마찰력이 작동하고 있어서 동력전달 과정중의 손실에 의해 조향핸들의 회전각도만큼 바퀴가 회전되지 않는다.In general, as the steering wheel is rotated while driving or stopping, the wheel that is in contact with the road surface is also steered. The friction force is operated between the wheel and the road surface, and the steering wheel is rotated due to the loss during the power transmission process. The wheels do not rotate by the angle.
따라서 이를 측정하여 보상하기 위한 수단이 필요한데, 이러한 기능을 하는 것이 토오크센서이다.Therefore, a means for measuring and compensating for this is needed, which is a torque sensor.
즉, 토오크센서를 통해 조향핸들의 회전각도와 바퀴의 회전각도 사이의 회전각도 편차를 측정하고, 측정된 편차만큼 별개의 동력수단으로 바퀴를 회전시킴으로써 차량을 진행시키고자 하는 방향으로 안전하게 조향하게 된다.That is, the torque sensor measures the deviation of the rotation angle between the steering angle of the steering wheel and the rotation angle of the wheel by the torque sensor, and safely steers in the direction to advance the vehicle by rotating the wheel by a separate power means by the measured deviation. .
종래 이러한 기능을 하는 차량용 조향장치의 토오크센서는 도 1 및 도 2에 도시된 바와 같이 일측단이 조향핸들(10)과 결합된 입력칼럼(20)과 일측단이 바퀴측과 결합된 출력칼럼(25)이 마련되고, 이 입력칼럼(20)과 출력칼럼(25)을 연결하며 조향정도에 따라 비틀림되는 토션바(TosionBar)(40)가 마련된다.Torque sensor of the conventional vehicle steering apparatus having such a function is shown in Figure 1 and 2 as shown in Figure 1 and the input column 20 coupled to the steering wheel 10 and the output column coupled to one side of the wheel ( 25 is provided, and a torsion bar 40 is connected to the input column 20 and the output column 25 and twisted according to the steering degree.
즉, 토션바(40)의 일단부가 입력칼럼(20)의 타단부와 결합되고 이의 타단부는 출력칼럼(25)의 타단부와 결합되어 있다.That is, one end of the torsion bar 40 is coupled with the other end of the input column 20 and the other end thereof is coupled with the other end of the output column 25.
그리고 입력칼럼(20)과 출력칼럼(25)의 타단부사이에는 자성체로 이루어진 3개의 검출링(50)이 일정간격 이격되게 구성되어 있는데 제 1검출링(51)은 조향핸들(10)측의 입력칼럼(20)외주면에 결합되어 조향핸들(10)과 동일한 각도로 회전운동하며, 제 2검출링(52)은 토션바(40)의 중심부 외주면, 그리고 제 3검출링(53)은 바퀴(미도시)측에 연계된 출력칼럼(25)의 타단부 외주면에 결합되어 바퀴(미도시)와 거의 동일한 각도로 회전운동한다.And between the other end of the input column 20 and the output column 25 is composed of three detection rings 50 made of a magnetic material spaced apart at regular intervals, the first detection ring 51 is the steering wheel 10 side It is coupled to the outer peripheral surface of the input column 20 and rotates at the same angle as the steering wheel 10, the second detection ring 52 is the outer peripheral surface of the center of the torsion bar 40, and the third detection ring 53 is a wheel ( It is coupled to the outer circumferential surface of the other end of the output column 25 associated with the side (not shown) and rotates at approximately the same angle as the wheel (not shown).
이때, 제 1검출링(51)의 일면, 즉 제 2검출링(52)과 대향하는 면에는 요철로 이루어진 치(齒)부(51a)가 형성되어 있으며, 제 2검출링(52)과 제 3검출링(53)의 서로 대향하는 면에도 역시 치부(52a, 53a)가 각각 형성되어 있다.At this time, one surface of the first detection ring 51, that is, the surface facing the second detection ring 52 is formed with a tooth portion 51a made of irregularities, the second detection ring 52 and the first Teeth 52a and 53a are also formed on the surfaces of the three detection rings 53 facing each other.
또한, 제 1검출링(51)과 제 2검출링(52)사이의 외측면과 제 2검출링(52)과 제 3 검출링(53)사이의 외측면에는 각각 코일(60, 70)이 권선되어 있으며, 이는 차량의 적소에 마련된 제어부(80)와 접속된다.In addition, coils 60 and 70 are provided on the outer surface between the first detection ring 51 and the second detection ring 52 and the outer surface between the second detection ring 52 and the third detection ring 53, respectively. It is wound, which is connected to the controller 80 provided in place of the vehicle.
이와 같이 구성된 종래 차량용 조향장치의 토오크센서의 작동은 다음과 같다.The operation of the torque sensor of the conventional vehicle steering device configured as described above is as follows.
먼저, 운전자가 조향핸들(10)을 회전시키면 토션바(40) 및 입력, 출력칼럼(20, 25)도 일체로 회전하는데, 조향핸들(10)측과 결합된 토션바(40)의 일측이 바퀴(미도시)측과 결합된 타측보다 비틀려져 많이 회전된다.First, when the driver rotates the steering wheel 10, the torsion bar 40 and the input and output columns 20 and 25 are also integrally rotated. One side of the torsion bar 40 coupled with the steering wheel 10 side is It is rotated a lot more than the other side coupled to the wheel (not shown) side.
즉, 바퀴의 노면마찰력에 의해 제 1검출링(51), 제 2검출링(52) 그리고 제 3검출링(53)순으로 회전각도가 크게 된다.That is, the rotation angle increases in the order of the first detection ring 51, the second detection ring 52, and the third detection ring 53 by the road frictional force of the wheel.
따라서, 제 1검출링(51)과 제 2검출링(52)의 대향면적은 거의 변하지 않는데 각각 치부(52a, 53a)가 형성된 제 2검출링(52)과 제 3검출링(53)의 대향면적이 변화되며 제 2검출링(52)과 제 3검출링(53)사이의 바깥측 자속의 변화로 제 2코일(70)의 인덕턴스 값이 변화된다.Accordingly, the opposing areas of the first detection ring 51 and the second detection ring 52 hardly change, but the second detection ring 52 and the third detection ring 53 having the teeth 52a and 53a formed therebetween, respectively. The area is changed and the inductance value of the second coil 70 is changed by the change of the outer magnetic flux between the second detection ring 52 and the third detection ring 53.
즉, 최초에는 제 1코일(60)과 제 2코일(70)의 인덕턴스값이 동일하게 설정되어 있는데 조향핸들(10)의 회전으로 인해 제 1코일(60)의 인덕턴스값은 일정하고 제 2코일(70)의 인덕턴스값만 변하게됨으로써 제 1코일(60)의 인덕턴스 값에 대한 제 2코일(70)의 인덕턴스값의 변화를 측정하여 조향핸들(10)과 바퀴측의 회전편차를 측정하는 것이다.That is, initially, the inductance values of the first coil 60 and the second coil 70 are set to be the same, but due to the rotation of the steering wheel 10, the inductance value of the first coil 60 is constant and the second coil is fixed. Since only the inductance value of 70 is changed, a change in the inductance value of the second coil 70 with respect to the inductance value of the first coil 60 is measured to measure the rotational deviation between the steering wheel 10 and the wheel side.
본 고안은 이와같은 종래 차량용 토오크 센서에 관한 것으로, 에어갭에 따른 인덕턴스 변화를 이용하여 토오크를 보정할 수 있도록 하는 자동차용 토오크 센서를 제공하는데 그 목적이 있다.The present invention relates to such a conventional torque sensor for a vehicle, and an object of the present invention is to provide a torque sensor for a vehicle that can correct the torque using the change in inductance according to the air gap.
이와같은 목적을 달성하기 위한 본 고안은 검출링의 치차를 삼각톱니파형으로 구성하여 외부 토크양에 따라 에어갭이 좁아졌다 멀어졌다하면서 검출코일의 인덕턴스를 변화시키도록 구성한 것에 그 특징이 있다.The present invention for achieving the above object is characterized in that the gear of the detection ring is configured as a triangular sawtooth wave shape so as to change the inductance of the detection coil while the air gap is narrowed and moved according to the external torque amount.
제1도는 종래 차량용 토오크 센서의 사시도1 is a perspective view of a conventional vehicle torque sensor
제2도는 종래 토오크 센서의 요부도2 is a main diagram of a conventional torque sensor
제3도는 본 고안의 신호처리를 수행하기 위한 블륵도3 is a block diagram for performing signal processing of the present invention.
제4도는 본 고안에 따른 삼각톱니파 형태의 토오크 센서의 개략구성도4 is a schematic configuration diagram of a torque sensor of a triangular sawtooth wave according to the present invention
제5도는 본 고안의 작동형태를 설명하기 위한 도면5 is a view for explaining the operation mode of the present invention
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
30 : 발진부 31 : 검출코일30: oscillation unit 31: detection coil
32 : AC/DC변환부 33 : 온도보상부32: AC / DC converter 33: temperature compensation unit
34 : 증폭부 35 : V-I변환부34: amplifier 35: V-I converter
100 : 제1검출링 101 : 제2검출링100: first detection ring 101: second detection ring
102 : 제3검출링 103 : 검출코일102: third detection ring 103: detection coil
104 : 보상코일104: compensation coil
이하, 본 발명의 실시예를 첨부된 도면을 참고로 하여 상세히 설명하면 다음과 같다.Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
도 3은 본 고안의 신호처리를 수행하기 위한 블록도로, 발진을 발생시키는 발진부(30)와, 상기 발진부(30)의 발진에 의해 동작되며 제2검출링과 제3검출링사이의 바깥측 자속의 변화로 인덕턴스값이 변하는 검출코일(31)과, 치차변환으로 인한 인덕턴스변화로 유기된 신호를 직류신호로 변환시키는 AC/DC변환부(32)와, 상기 발진부(30)의 발진에 의해 동작되며 온도변화에 따른 측정오차를 보상해 주는 온도보상부(33)와, 상기 DC변환된 검출코일의 신호와 온도보상부(33)의 신호를 일정레벨로 증폭시키는 증폭부(34)와, 상기 증폭부(34)를 통해 일정레벨로 증폭된 신호전압을 전류로 변환시켜 출력시키는 V-I변환부(35)를 포함하여 구성된 것이다.3 is a block diagram for performing the signal processing of the present invention, the oscillation unit 30 for generating an oscillation, and the oscillation of the oscillation unit 30 is operated by the outer magnetic flux between the second detection ring and the third detection ring A detection coil 31 whose inductance value changes due to a change of, an AC / DC converter 32 for converting a signal induced by a change in inductance due to gear shift into a DC signal, and an oscillation of the oscillator 30 And a temperature compensator 33 for compensating measurement errors due to temperature changes, an amplification part 34 for amplifying a signal of the DC-converted detection coil and a signal of the temperature compensator 33 to a predetermined level, and It includes a VI converter 35 for converting the signal voltage amplified to a predetermined level through the amplifier 34 to a current output.
도4는 본 고안에 따른 검출링의 개략도로, 제1검출링내지 제3검출링(100-102)의 치차형상이 삼각톱니파형으로 이루어지며, 이 삼각톱니파의 외측에 검출코일(103)과 보상코일(104)이 각각 설치된 것으로, 도면중 미설명 부호 40은 운전자가 조향핸들을 회전시킬 때 일체로 회전하는 토션바를 나타낸다.Figure 4 is a schematic diagram of a detection ring according to the present invention, the tooth of the first detection ring to the third detection ring (100-102) is made of a triangular sawtooth wave, the detection coil 103 and the outside of the triangular sawtooth wave Compensation coils 104 are installed, respectively, reference numeral 40 in the figure indicates a torsion bar that rotates integrally when the driver rotates the steering wheel.
이와같이 구성된 본 고안은 도 1내지 도4를 참고로 하여 설명하면, 운전자가 조향핸들(10)을 회전시킬 때 토션바(40)및 입력, 출력칼럼(20,25)도 일체로 회전하는데, 조향핸들(10)측과 결합된 토션바(40)의 일측이 바퀴측과 결합된 타측보다 비틀려져 많이 회전된다.The present invention configured as described above will be described with reference to FIGS. 1 to 4, when the driver rotates the steering wheel 10, the torsion bar 40 and the input and output columns 20 and 25 also rotate integrally. One side of the torsion bar 40 coupled with the handle 10 side is twisted more than the other side coupled with the wheel side is rotated a lot.
즉, 바퀴의 노면마찰력에 의해 제 1검출링-제 2검출링-제 3검출링순으로 회전각도가 크게 된다.That is, the rotation angle is increased in the order of the first detection ring, the second detection ring, and the third detection ring by the road frictional force of the wheel.
따라서, 도 4에서 볼 때 제 2검출링(101)과 제 3검출링(102)의 대향면적이 변화되므로 제 2검출링(101)과 제 3검출링(102)사이의 바깥측 자속이 변화되어 검출코일(103)의 인덕턴스 값이 변화된다.Therefore, as shown in FIG. 4, since the opposing areas of the second detection ring 101 and the third detection ring 102 change, the outer magnetic flux between the second detection ring 101 and the third detection ring 102 changes. Thus, the inductance value of the detection coil 103 is changed.
즉, 최초에는 보상코일(104)과 검출코일(103)의 인덕턴스 값이 동일하게 설정되어 있는데 조향핸들(10)의 회전으로 인해 보상코일(104)의 인덕턴스 값은 일정하고 검출코일(103)의 인덕턴스 값만 변하게됨으로써 보상코일(104)의 인덕턴스값에 대한 검출코일(103)의 인덕턴스값의 변화를 측정하여 조향핸들(10)과 바퀴측의 회전편차를 측정하게 된다.That is, initially, the inductance values of the compensation coil 104 and the detection coil 103 are set to be the same. However, due to the rotation of the steering wheel 10, the inductance value of the compensation coil 104 is constant and Since only the inductance value is changed, a change in the inductance value of the detection coil 103 with respect to the inductance value of the compensation coil 104 is measured to measure the rotational deviation between the steering wheel 10 and the wheel side.
이때, 본 고안의 작동원리는 인덕턴스에 비례하는 에어갭(Airgap)에 따라 출력값이 변화하는 것으로, 본 고안의 제1검출링내지 제3검출링(100-102)에 각각 형성된 치차는 삼각톱니파형으로 이루어져 있어 외부 토크양에 따라 에어갭이 좁아졌다 멀어졌다하면서 검출코일(103)의 인덕턴스를 변화시킨다.At this time, the operating principle of the present invention is that the output value is changed according to the air gap (Airgap) proportional to the inductance, each tooth formed in the first detection ring to the third detection ring (100-102) of the present invention is a triangular sawtooth waveform The inductance of the detection coil 103 is changed while the air gap is narrowed and separated according to the external torque.
즉, 도5에 도시된 바와같이 자동차의 중립위치에서는 제2검출링(101)과 제3검출링(102)의 삼각톱니파형의 치차꼭지점이 수평위치로 볼 때 동일선상에 위치해 있지만, 우회전시에는 제2검출링(101)의 삼각톱니파형의 치차꼭지점이 제3검출링(102)의 삼각톱니파형의 치차꼭지점보다 상방에 위치하게 되는 반면에 좌회전시에는 제2검출링(101)의 삼각톱니파형의 치차꼭지점이 제3검출링(102)의 삼각톱니파형의 치차꼭지점보다 하방에 위치하게 된다.That is, as shown in FIG. 5, in the neutral position of the vehicle, the toothed vertices of the triangular sawtooth waveform of the second detection ring 101 and the third detection ring 102 are located on the same line when viewed in the horizontal position, The toothed vertex of the triangular sawtooth waveform of the second detection ring 101 is located above the toothed vertex of the triangular sawtooth waveform of the third detection ring 102, while the left side of the triangle of the second detection ring 101 The toothed tooth tip of the sawtooth wave is located below the toothed tooth of the triangle sawtooth wave of the third detection ring 102.
이때, 제2검출링(101)과 제3검출링(102)사이의 에어갭을 ℓ g라고 하고 인덕턴스를 L이라 할 때가 된다.At this time, when the air gap between the second detection ring 101 and the third detection ring 102 is ℓ g and the inductance is L Becomes
따라서, 도 3을 참고로 설명하면, 삼각톱니파형 치차의 인덕턴스의 변화가 검출코일(31)에서 검출되면, 이렇게 검출된 값이 AC/DC변환부(32)를 통해 DC로 변환된 후 증폭부(34)를 통해 일정레벨로 증폭되어 V-I변환부(35)를 거쳐 전류로 출력되며, 이후 V-I변환부(35)에서 변환된 전류를 이용하여 조향편차를 측정하고, 구동부를 통해 동력수단을 가동하여 조향핸들측과 바퀴측의 회전편차를 보상하도록 한다.Therefore, referring to FIG. 3, when the change in inductance of the triangular sawtooth waveform is detected by the detection coil 31, the detected value is converted into DC through the AC / DC converter 32 and then the amplification unit is converted into DC. Amplified to a predetermined level through 34 and outputted as a current through the VI converter 35, after which the steering deviation is measured using the current converted by the VI converter 35, and the power unit is operated through the driver. To compensate for rotational deviations between the steering wheel and wheels.
한편, 검출코일(103)의 인덕턴스값은 온도에 따라 약 0.003576 mH/℃ (실험치)정도 직선적으로 증가하는데, 이는 온도에 따른 치차의 투자율의 변화에 따른 것이다.On the other hand, the inductance value of the detection coil 103 increases linearly by about 0.003576 mH / ° C (experimental value) with temperature, which is due to the change in the permeability of the gear with temperature.
그리고 이 변화는 전압으로 변환시 약 0.2mV/℃ 만큼 변화하므로 결과적으로 토오크센서의 온도범위(-40~80℃) 즉, 120도 범위에서 24mV 정도 온도에 의해서 드리프트(Drift)가 발생한다.And this change is changed by about 0.2mV / ℃ when converted to voltage, and as a result, the drift occurs by the temperature range of the torque sensor (-40 ~ 80 ℃), that is, about 24mV in the 120 degree range.
측정결과 증폭전의 토오크센서는 외부 토오크양에 의해 최대 42mV 정도 변화하는데 실제적으로 조향장치에 사용되는 토오크센서는 작은 변위를 감지하므로 약 10mV 이하의 변위값을 갖는다.As a result of measurement, the torque sensor before amplification changes up to 42mV by the external torque amount. Actually, the torque sensor used in steering system senses small displacement, so it has a displacement less than about 10mV.
따라서, 이 변위의 출력전압값은 온도에 의해서 발생되는 온도 드리프트 값보다 2배이상 작다.Therefore, the output voltage value of this displacement is two times smaller than the temperature drift value generated by the temperature.
따라서, 토오크센서의 온도보상은 필수적이라 할 수 있으며, 정확한 온도보상을 위해서는 검출코일(103)과 동일한 조건의 더미(Dummy)코일 즉, 보상코일(104)을 추가로 장착하는 것이다.Therefore, the temperature compensation of the torque sensor can be said to be essential. For accurate temperature compensation, a dummy coil, that is, a compensation coil 104 having the same condition as the detection coil 103 is additionally installed.
즉, 검출코일(103)과 보상코일(104)의 조건이 비슷하고 자기회로상으로 동일하다면 온도에 따라 동일한 출력전압(기울기 0.2mV/℃)을 갖는다.That is, if the conditions of the detection coil 103 and the compensation coil 104 are similar and the same on the magnetic circuit, they have the same output voltage (slope 0.2 mV / ° C) depending on the temperature.
따라서, 센서 신호를 차동 증폭시 보상코일의 온도에 따라 변화를 차동시켜 출력단에는 순수한 외부 토크에 의한 출력값만이 출력되어 온도보상을 하게 된다.Accordingly, when differentially amplifying the sensor signal, the change is differential according to the temperature of the compensation coil, and only the output value by pure external torque is output to the output stage to compensate for the temperature.
이상에서 설명한 바와같은 본 고안은 감지방법이 기존의 것은 자기회로(자로)가 변화하는 것에 따라 토오크 센서의 감지가 이루어졌지만, 본 고안은 토오크센서의 치차를 삼각톱니파형으로 구성하여 에어갭에 따른 인덕턴스 변화를 이용함으로써 조향핸들의 조향각도와 바퀴의 조향각도사이의 편차를 더욱 정확히 측정할 수 있는 효과가 있는 것이다.As described above, in the present invention, the detection method is conventional, but the detection of the torque sensor is performed as the magnetic circuit is changed, but the present invention configures the gear of the torque sensor in a triangular sawtooth wave shape, By using the inductance change, it is possible to more accurately measure the deviation between the steering angle of the steering wheel and the steering angle of the wheel.
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| KR2019970013197U KR200154795Y1 (en) | 1997-06-02 | 1997-06-02 | Torque sensor for a vehicle |
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