A contact-type piezoresistive micro-shear stress sensor for above-knee prosthesis application

Ming Chun Hsieh, Yean Kuen Fang, Ming Shaung Ju, Gin Shin Chen, Jyh Jier Ho, C. H. Yang, Pei Ming Wu, G. S. Wu, Terry Yuan Fang Chen

研究成果: Article同行評審

51 引文 斯高帕斯(Scopus)


A prototype contact-type micro piezoresistive shear-stress sensor that can be utilized to measure the shear stress between skin of stump and socket of above-knee (AK) prosthesis was designed, fabricated and tested. Micro-electro-mechanical system (MEMS) technology has been chosen for the design because of the low cost, small size and adaptability to this application. In this paper, the finite element method (FEM) package ANSYS has been employed for the stress analysis of the micro shear-stress sensors. The sensors contain two transducers that will transform the stresses into an output voltage. In the developed sensor, a 3000x 3000x300 μm3 square membrane is formed by bulk micromaching of an n-type (100) monolithic silicon. The piezoresistive strain gauges were implanted with boron ions with a dose of 1015 atoms/cm2. Static characteristics of the shear sensor were determined through a series of calibration tests. The fabricated sensor exhibits a sensitivity of 0.13 mV/mA-MPa for a 1.4 N full scales shear force range and the overall mean hysteresis error is than 3.5 %. In addition, the results simulated by FEM are validated by comparison with experimental investigations.

頁(從 - 到)121-127
期刊Journal of Microelectromechanical Systems
出版狀態Published - 2001 3月

All Science Journal Classification (ASJC) codes

  • 機械工業
  • 電氣與電子工程


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