Volume 32 Issue 11
Nov.  2006
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Fan Shangchun, Cai Chenguang, Wang Yingying, et al. Resonant sensor with double resonators[J]. Journal of Beijing University of Aeronautics and Astronautics, 2006, 32(11): 1308-1311. (in Chinese)
Citation: Fan Shangchun, Cai Chenguang, Wang Yingying, et al. Resonant sensor with double resonators[J]. Journal of Beijing University of Aeronautics and Astronautics, 2006, 32(11): 1308-1311. (in Chinese)

Resonant sensor with double resonators

  • Received Date: 30 Apr 2006
  • Publish Date: 30 Nov 2006
  • A new resonant sensor consisting of two resonators of uniform structure and size is presented. The closed loop control system is composed of two amplitude controllers and an inverter. The frequency characteristics of the two resonators in series are analyzed. It is found that the phase shift of the two resonators in series is 180° at the resonator′s nature frequency. Based on the frequency characteristics, the closed loop system of a resonant sensor with double resonators is designed. When the structure and size of the two resonators is not uniform, the frequency characteristics of the two resonators in series are also analyzed. When there is a little difference between the two resonators in series, they can also be used in a resonant sensor. In the closed loop control system, the phase shifter need not be used. The measurement error brought by the phase drift is avoided, and the Q factor of the resonant sensor is effectively increased.

     

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