Design and Development of a Micro High-Speed Torque Sensor
Date Issued
2015
Date
2015
Author(s)
Tsai, Miao-Ru
Abstract
Recently, measurements of the torque in a continuous rotating shaft are often required for Electric Power Assisted Steering (EPAS) systems, machine tools, engines, etc. With the development of technology, the performance of continuous torque measurement has become more delicate and higher responses. The aim of this paper is design and develop a measuring system, which focus on the characteristic of high-speed motors, and can simultaneously obtain its dynamic torque and rotational speed. A non-contact measurement of the angular strain which caused by torque on the shaft is developed. By the principle of photo interrupters, we can avoid heat issues on the shaft resulted from high speed rotating, making the measuring system more stable. Through controlling the braking torque applied on the torque sensor, we can achieve the purpose of testing the dynamic performance of the torque sensor and motors. To measure the dynamic performances of motor, this paper begins with deriving the theoretical background of non-contact torque measuring theories. As the concept of modular, the structural design of measuring system had been constructed. The appropriate design parameter had been obtained through the optimization by simulation with finite element method(FEM) and material mechanics theory analysis. By applying the photo interrupters, the torque sensor can measure micro-torque of continuous rotating motors. The measuring unit of the torque sensor can achieve 0 to 13 Nmm, with the rotating speed range from 0 to 14000 rpm. In addition, the resolution of dynamic torque measurement is 0.1 Nmm.
Subjects
noncontact
photointerrupter
torque sensor
micro-sensor
high speed
Type
thesis
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ntu-104-R02522621-1.pdf
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