一种基于FPGA的激光干涉低频振动校准方法  

A method of interferometer low-frequency vibration calibration based on FPGA

作　　者：王朝 蔡晨光[2] 杨明[3] 孔明 郭天太 赵军 WANG Zhao;CAI Chenguang;YANG Ming;KONG Ming;GUO Tiantai;ZHAO Jun(Collage of Metrology&Measurement Engineering,China Jiliang University,Hangzhou Zhejiang 310018,China;National Institute of Metrology,Beijing 100029,China;Beijing University of Chemical Technology,Beijing 100029,China)

机构地区：[1]中国计量大学计量测试工程学院,杭州31OO18 [2]中国计量科学研究院,北京100029 [3]北京化工大学,北京100029

出　　处：《激光杂志》2020年第2期11-14,共4页Laser Journal

基　　金：国家重点研发计划资助(No.2017YFF0205003)

摘　　要：针对现有外差激光干涉法存在低频振动校准时采集及处理数据量大,导致处理系统内存不足或处理时间长等问题。基于FPGA的外差激光干涉仪输出S/PDIF信号解码提出了一种低频加速度计振动校准方法,其能够在减少数据处理量的同时保证校准精度。实验结果表明,该方法能够实现0.1~10 Hz频率范围内的高精度灵敏度幅值与相位校准。The current heterodyne interferometry has the problems of large amount of sampling data,long processing time,and etc.In this study,a low-frequency accelerometer vibration calibration method is proposed based on FP・GA to decode the output S/PDIF signal of heterodyne interferometer,which can dramatically shorten the processing time while ensuring calibration accuracy.Experimental results demonstrate that the proposed method can achieve high-accuracy sensitivity magnitude and phase vibration calibration in frequency range from 0.1 to 10 Hz.

关 键 词：振动校准 外差激光干涉法 低频加速度计 FPGA S/PDIF 

分 类 号：TN249[电子电信—物理电子学]