摘要
由于谐振型传感器在感测被测之量变化时 ,表现为谐振频率的偏移 ,因此 ,为提高传感器的分辨率和灵敏度 ,对探索频偏的精确测定很为重要 .本文首先对 Duffing方程进行仿真 ,指出 Duffing方程在从混沌状态到大周期转变时 ,同时具有幅值敏感性和频率敏感性 ,进一步提出频率敏感性可应用于传感器微弱频率变化的提取 .仿真表明该方法还能实现对不同频率变化精度的预性测量 ,文中还进一步分析了其理论基础 。
For enhancing sensitive and resolving power it is very important to explore the method to detect frequency varitation which is the syntony sensor′s output. It is pointed that Duffing equation express amplitude and frequency sensitive property when system transits from chaotic to great periodic motion and that frequency sensitive property fits for extraction of weak frequency variation through simulation. It is verified to realize flexible measure at different frequency variation precision through simulation. The theory basis is further analyzed and the standpoint about equivalent driven force is presented.
出处
《传感技术学报》
CAS
CSCD
2002年第1期1-4,共4页
Chinese Journal of Sensors and Actuators
基金
国家自然科学基金(5 0 0 770 16)资助
