Lin Ningning, Meng Xiaofeng, Nie Jing
Science and Technology on Inertial Laboratory, Beihang University, Beijing 100191, China.
Sensors (Basel). 2016 Nov 18;16(11):1944. doi: 10.3390/s16111944.
In this paper, the influence of temperature on quartz crystal microbalance (QCM) sensor response during dew point calibration is investigated. The aim is to present a compensation method to eliminate temperature impact on frequency acquisition. A new sensitive structure is proposed with double QCMs. One is kept in contact with the environment, whereas the other is not exposed to the atmosphere. There is a thermal conductivity silicone pad between each crystal and a refrigeration device to keep a uniform temperature condition. A differential frequency method is described in detail and is applied to calibrate the frequency characteristics of QCM at the dew point of -3.75 °C. It is worth noting that frequency changes of two QCMs were approximately opposite when temperature conditions were changed simultaneously. The results from continuous experiments show that the frequencies of two QCMs as the dew point moment was reached have strong consistency and high repeatability, leading to the conclusion that the sensitive structure can calibrate dew points with high reliability.
本文研究了露点校准过程中温度对石英晶体微天平（QCM）传感器响应的影响。目的是提出一种补偿方法，以消除温度对频率采集的影响。提出了一种采用双QCM的新型敏感结构。一个与环境接触，而另一个不暴露在大气中。每个晶体与制冷装置之间有一个导热硅垫，以保持均匀的温度条件。详细描述了一种差分频率方法，并将其应用于在-3.75°C露点下校准QCM的频率特性。值得注意的是，当温度条件同时改变时，两个QCM的频率变化大致相反。连续实验结果表明，在达到露点时刻时，两个QCM的频率具有很强的一致性和高重复性，从而得出敏感结构能够以高可靠性校准露点的结论。
