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Article Navigation> JOURNAL OF BEIJING INSTITUTE OF TECHNOLOGY> 2011> 20(2): 221-226
ZHANG Yun-tao, XU Chun-guang, PAN Qin-xue, LIU Jing, LI Xi-peng. Strain transfer mechanism of passive wireless surface acoustic wave torque sensors using shear lag theory[J]. JOURNAL OF BEIJING INSTITUTE OF TECHNOLOGY, 2011, 20(2): 221-226.
Citation: ZHANG Yun-tao, XU Chun-guang, PAN Qin-xue, LIU Jing, LI Xi-peng. Strain transfer mechanism of passive wireless surface acoustic wave torque sensors using shear lag theory[J].JOURNAL OF BEIJING INSTITUTE OF TECHNOLOGY, 2011, 20(2): 221-226.
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Strain transfer mechanism of passive wireless surface acoustic wave torque sensors using shear lag theory

  • Key Laboratory of Fundamental Science for Advanced Machining, Beijing Institute of Technology, Beijing 100081, China

  • Received Date:2010-09-08
    Abstract
  • A shear-lag theory was developed to investigate the strain transfer from the metal substrate to the surface acoustic wave (SAW) resonator through a bonding layer. A three-layer model of host structure-adhesive layer-resonator layer was established. The strain transfer was theoretically analyzed, and the main factors impacting the SAW sensor measurement were studied. The relationship between the sensor response and the individual effect of all these factors under static loads was discussed. Results showed that better accuracy could be achieved with increase in the adhesive stiffness or resonator length, or decrease in the adhesive thickness. The values of the strain transfer rate calculated from the analytical model agreed well with that from the available experiment data.
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