多电极石英谐振器的信号处理电路及力敏实验  

The Signal Processing Circuits of Multi-electrode Quartz Resonator and Force-frequency Sensitive Experiments

作　　者：罗兵[1] 田文杰[1] 赵庆江[2] 李绍鹏[1] 周红云[1] 

机构地区：[1]北京信息科技大学传感器重点实验室,北京100101 [2]昆明学院物理科学与技术系,云南昆明650031

出　　处：《压电与声光》2010年第5期766-769,共4页Piezoelectrics & Acoustooptics

基　　金：北京市自然科学基金资助项目(4082011);北京(传感器)重点实验室开放课题基金资助项目(KM20091077206);北京市教委科技创新平台基金资助项目(PXM2008_014224_067420);现代控制技术教育部重点实验室(北京信息科技大学)基金资助项目

摘　　要：基于一种单基多电极石英晶体谐振器的结构,提出了一种新型的电路设计方案,这种电路设计方案在同一晶体基片上让不同位置的谐振器同时起振,输出3个基频信号,然后采用差频、求和,最后以倍频输出的方式输出。用此方案设计的电路进行AT切同基三电极谐振器的力频灵敏度实验,抑制了干扰因素,优化了力频转换系数,线性度保持良好。在一定加力方式下,经求和电路处理后的力-频转换系数可达1.369Hz/g。Based on a kind of structure of same-base multi-electrode quartz resonator,a new circuit design scheme is presented.Three base frequency signals are firstly outputted when different places resonator is vibrated synchronously,and then are sent to mixer,after difference frequency signals are obtained,signals are sent to mixer again,sum frequency signals are obtained through high-pass filter.At last,multiple frequency signals are outputted.Force-frequency sensitive experiments are performed by using the new circuit scheme.The results show that force-frequency conversion coefficients are optimized,interference factors are inhibited,and linear correlation coefficients are rarely changed.When force is added along a certain direction,force-frequency conversion coefficient is 1.369 Hz/g after sum circuit＇s processing.

关 键 词：石英晶体 信号处理 谐振器 力-频系数 

分 类 号：TN709[电子电信—电路与系统] O765[理学—晶体学]