摘要
为改进晶体谐振器在阻尼介质中频率的稳定性和分辨率,研究了分辨率和干扰频率的理论关系,采用D触发器设计混频电路来减小回路的噪音干扰,由此分析了石英晶片上附着微小质量和液体时的等效电路,并制作了QCM传感器,得到了电路响应曲线;取4MHz、10MHz的谐振器在液体中进行了试验。结果表明:提高晶体谐振器的分辨率,减小噪音在谐振器中的出现比提高频率更有效。
In order to improve the stability and resolution of crystal oscillator frequency in the damping media,the relationship between frequency resolution and interference was studied.Mixer circuit was designed to reduce the loop noise using D flip-flop.The equivalent circuit of the quartz crystal mass loading and liquid damping was analyzed,QCM sensor was developed,and then response curve was obtained.In the experiment,4,10 MHz resonator was tested in the liquid.The results show that the resolution of improving crystal resonator,reducing the noise in the resonator is more effective than increasing the frequency.
出处
《传感技术学报》
CAS
CSCD
北大核心
2010年第12期1757-1760,共4页
Chinese Journal of Sensors and Actuators
基金
国家"863"基金项目资助(2009AA03Z107)
国家自然科学基金项目资助(50875114)
关键词
石英晶体微天平
频率响应
灵敏度分析
阻尼
分辨率
quartz crystal microbalances
frequency response
sensitivity analysis
damping
resolution
