Resonant Frequency Measurement of Quartz Crystal Based on DDS and Real-time Peak Searching

被引：3

作者：

Zhao, Lei ^{[1
]}

Meng, Xiaofeng ^{[1
]}

Liu, Furui ^{[1
]}

机构：

[1] Beihang Univ, Sch Instrumentat Sci & Optoelect Engn, Beijing 100191, Peoples R China

来源：

PROCEEDINGS OF 2016 SIXTH INTERNATIONAL CONFERENCE ON INSTRUMENTATION & MEASUREMENT, COMPUTER, COMMUNICATION AND CONTROL (IMCCC 2016) | 2016年

关键词：

quartz crystal; resonant frequency; DDS; searching algorithm; impedance;

D O I：

10.1109/IMCCC.2016.60

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

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.

引用

页码：513 / 516

页数：4

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