GUO Jian-feng, LIU Qing-hui, ZHENG Guo-heng, et al. Research of equivalent circuit model for QCM-based humidity sensor[J]. 2017, 36(8): 29-31. DOI: 10.13873/J.1000-9787(2017)08-0029-03.
Quartz crystal microbalance( QCM)-based humidity sensor is a new type of high sensitivity sensor based on quartz crystal as the core element of oscillator circuit. According to the oscillation startup and stable condition of QCM in the gas phase
the model for equivalent circuit parameter changes while senstive film coated on QC absorbing moisture is established
and a new equivalent circuit model for humidity sensor is obtained. The model is simulated to demonstrate the correctness and effectiveness of the model by using PSPICE software
which is carried out by an experimental platform for QCM-based humidity sensor. It will have certain instructional significance on the design and improvement of oscillation circuits of QCM humidity sensor.
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