抑制石英晶体微天平的跳频

Proceedings of the 2014 Symposium on Piezoelectricity, Acoustic Waves, and Device Applications Pub Date : 2014-12-29 DOI:10.1109/SPAWDA.2014.6998565

Yannan Han, Wen-qiang Zheng, Dong-lin Su

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引用次数: 0

摘要

石英晶体微天平(QCM)通过测量频率位移来获取质量信息。检测灵敏度可达纳米级。某型用于空间污染检测的15MHz QCM在反复开关电源时出现频率跳变，导致测量功能失效。从决定QCM频率的石英谐振器和振荡电路两方面进行了分析，得出合理设计谐振器电极和振荡电路参数可以抑制QCM频率跳变的结论。对15MHz石英晶体微天平(QCM)进行了抑制，有效地控制了频率跳变。电源开关试验200次，频率跳变不再出现。最后，给出了一种验证抑制效果的简单方法。

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Suppressing the frequency jump in quartz crystal microbalance

Quartz crystal microbalance (QCM) acquires the mass information through measuring the frequency shift. The detection sensitivity can achieve to nano-gram. A type of 15MHz QCM used in space contamination detection appeared the frequency jump when switching the power supply repeatedly, which disabled the measurement function. The analysis was made from quartz resonator and oscillator circuit which deciding the QCM's frequency, and the conclusion was drawn that properly designing the resonator electrodes and the oscillator circuit parameters could suppress the frequency jump. The suppressing methods were carried out on the 15MHz quartz crystal microbalance (QCM), and effectively controlled the frequency jump. Trying the power supply switching test 200 times, the frequency jump didn't appear any more. At the end, a simple method to verify the suppressing effect is provided.

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Proceedings of the 2014 Symposium on Piezoelectricity, Acoustic Waves, and Device Applications

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