Resonant Frequency Measurement of Quartz Crystal Based on DDS and Real-time Peak Searching
In order to solve the unstable problem of conventional methods for measuring resonant frequency of quartz crystal,a method based on DDS (Direct Digital Synthesis) and real-time peak searching is proposed to increase stability of measurement.By actively generating excitation signal using DDS,the response of quartz crystal can be obtained even under heavy load.Frequency response of impedance is studied to reveal the relationship between minimum impedance and resonant frequency.Electric circuit and real-time searching algorithm is designed to track resonant frequency of quartz crystal.Experimental results show when parameter of quartz crystal changes 392.0%,the resonant frequency could still be measured by the developed method.
quartz crystal resonant frequency DDS searching algorithm impedance
Lei Zhao Xiaofeng Meng Furui Liu
School of Instrumentation Science and Opto-electronics Engineering Beihang University Beijing, China
国际会议
哈尔滨
英文
513-516
2016-07-21（万方平台首次上网日期，不代表论文的发表时间）