• Title/Summary/Keyword: Capacitive torque sensor

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Output Characteristics and Sensitivity Analysis of Capacitive Type Torque Sensor (정전용량방식 토크센서의 출력특성과 감도해석)

  • Lee, Shin-Pyo;Kim, Jong-Bo
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.26 no.12
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    • pp.2590-2597
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    • 2002
  • A new torque measuring apparatus adopting the basic principle of a capacitive type sensor is proposed in this article. Two plate electrodes are working as a capacitive sensor, whose capacitance varies as torque is applied. One end of each plate is connected to the torque carrying shaft. Output characteristics of the torque sensor were theoretically analyzed and its validity was investigated through experiment. Calculations and calibration experiments show that the output is nonlinear, that is, the sensitivity is very high at low torque but decreases as torque increases. The sensitivity of the proposed system is about 100 times roughly higher than that of a conventional 4-strain gauge type torque sensor.

Principle of Design and Performance of the Torque Sensor for a Electrical Power Steering (전동식 파워스티어링(EPS)용 토크센서의 설계원리와 성능테스트)

  • Lee Eung-Shin
    • Transactions of the Korean Society of Automotive Engineers
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    • v.13 no.5
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    • pp.121-126
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    • 2005
  • This paper describes the attributes, performance and development status of a high performance capacitive torque sensor intended for use in a electric power steering (EPS) system. The EPS system is composed of torque sensor, ECU, motor, gears and etc. Among the elements, torque sensor in the steering column is one of the core technologies. The new capacitive torque sensor in this paper is developed differently from working principle and mechanical structure compare to extant torque sensors in market and patent. Based on the result of numerical analysis, a experimental equipment is made which is composed of a test jig and a capacitive sensor and validity of numerical analysis and feasibility of the torque sensor are verified.

CALIBRATION OF A NEW CAPACITIVE TORQUE SENSOR FOR MEASURING BASIC MAGNETIC CHARACTERISTICS WITH ELECTROMAGNETIC AND GRAVITATIONAL FORCES

  • Kim, M.Y.;Choi, K.L.;Choi, S.J.;Song, E.Y.;Lee, Y.H.;Hee, J.R.
    • Journal of the Korean Magnetics Society
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    • v.5 no.5
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    • pp.786-789
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    • 1995
  • With a newly designed capacitive torque sensor a multipurpose magnetometer for measuring basic magnetic characteristics such as hyteresis loops, magnetic anisotropy and magnetostriction was built. In order to calibrate the capacitive torque sensor, we measured the output voltages of the sensor by applying the torques due to the electromagnetic and gravitational forces. Experimental results of the several calibration method for the capacitive torque sensor showed good agreement within 3 %.

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A study on the development of a environment-friendly vehicle device (친환경 자동차 부품 개발에 대한 연구)

  • Lee Eung-Shin;Lee Jang Moo;Song Jun Gyu
    • 한국신재생에너지학회:학술대회논문집
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    • 2005.06a
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    • pp.335-338
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    • 2005
  • Starting with the development of environmentally friendly electric controlled engine, sensors have played an increasing role in automotive technology. Electric power steering (EPS) systems are more and more replacing hydraulic systems. To improve fuel economy, the power assistance is provided by an electric drive. In this paper, development of a unique torque sensor for EPS is introduced. A capacitive type torque sensor is concluded to be suitable for EPS because its output is accurate, linear and robust against the variance of temperature, and patents have not applied so much.

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A Study on the ECU for Controlling One Cylinder Motorcycle Engine (단기통 모터사이클 엔진 제어용 ECU에 관한 연구)

  • Jung, Tae-Gyun;Chae, Jae-Ou
    • Transactions of the Korean Society of Automotive Engineers
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    • v.13 no.6
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    • pp.13-20
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    • 2005
  • The most typical fuel control devices of motorcycle engines have carburetors, they are simple in structure and reliable in work. Most of the motorcycle engines have used carburetors in the fuel system, but the fuel economy and the emissions of those engines are bad when we compared with automobile engines. According to stricter emission regulations and higher requirements for fuel economy, the application of the carburetor on the motorcycle engines would be limited. In this paper, we studied about the ECU of motorcycle engine controled by indirect method. A new engine system was designed and experiments were carried out. The experimental results for both carburetor type and ECU type were compared. Maximum torque of $1.053kg{\cdot}m$ at 6500rpm was measured. The engine torque controled using ECU was increased by $10\%$ compared with the carburetor type.