Transactions of the Korean Society of Mechanical Engineers A (대한기계학회논문집A)

The Korean Society of Mechanical Engineers (대한기계학회)
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Output Characteristics and Sensitivity Analysis of Capacitive Type Torque Sensor

정전용량방식 토크센서의 출력특성과 감도해석

  • 이신표 (경기대학교 기계공학과) ;
  • 김종보 (경기대학교 대학원 기계공학과)
  • Published : 2002.12.01
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Abstract

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.

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References

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