基于FPGA的微机械陀螺频响特性测试方法研究  

Research of Test Method for Frequency Response Characteristics for Micro⁃gyroscope Based on FPGA

作　　者：郭春宏 金丽 唐维平[1,2,3] 张瑞 李孟委 GUO Chun-hong;JIN Li;TANG Wei-ping;ZHANG Rui;LI Meng-wei(Nantong Institute of Intelligent Opto-Mechatronics,North University of China,Nantong 226000,China;School of Instrument and Electronics,North University of China,Taiyuan 030051,China;Academy for Advanced Interdisciplinary Research,North University of China,Taiyuan 030051,China)

机构地区：[1]中北大学南通智能光机电研究院,江苏南通226000 [2]中北大学仪器与电子学院,山西太原030051 [3]中北大学前沿交叉科学研究院,山西太原030051

出　　处：《仪表技术与传感器》2021年第12期62-65,70,共5页Instrument Technique and Sensor

基　　金：山西省青年科技研究基金项目(201901D211277);中北大学科学研究基金项目(XJJ201901)。

摘　　要：为了研制具有高灵敏度的微机械陀螺,需要对陀螺的驱动/检测模态品质因数以及谐振频率进行实时测试。传统的扫频测试方法测试效率低,操作与实现较复杂,因此需要设计具有高效率、可自动化的微机械陀螺性能测试系统以满足测试需求。文中设计了一种基于FPGA的微机械陀螺频响特性测试系统,通过直接数字频率合成器(DDS)产生扫频信号来驱动陀螺,利用锁相放大原理实现幅值的解调与放大,在上位机实时显示频响特性曲线,并自动显示驱动/检测模态的品质因数和谐振频率大小,极大地提高了测试效率。In order to realize the micro-gyroscope with high sensitivity, it’s necessary to test the quality factors and resonant frequency characteristics in the driven and sense modal.The traditional swept-frequency-test method efficiency is low, and the operation and implementation are complicated.Therefore, it is necessary to design an efficient and automatable micro-mechanical gyroscope performance testing system to meet the testing requirements.This paper designed an FPGA-based frequency response characteristic test system for micro-machined gyroscopes.The gyroscope was driven by the direct digital frequency synthesizer(DDS) to generate a frequency sweep signal, and the amplitude was demodulated and amplified by the principle of phase-locked amplification.The frequency response characteristic curve was displayed in real time, and the quality factor and resonance frequency of the driven and sense mode were also automatically displayed, greatly improving the test efficiency of micro-gyroscope.

关 键 词：微陀螺 直接数字频率合成器 锁相放大 FPGA 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]