一种激光多普勒测振仪的自我消噪技术  

SELF DENOISING TECHNIQUE FOR LASER DOPPLER VIBROMETER

作　　者：杜岩[1] 刘敬楠 谢谟文[1] 张晓勇 霍磊晨 Du Yan;Liu Jingnan;Xie Mowen;Zhang Xiaoyong;Huo Leichen(Beijing Key Laboratory of Urban Underground Space Engineering,University of Science and Technology Beijing,Beijing 100083,China)

机构地区：[1]北京科技大学城市地下空间工程北京市重点实验室,北京100083

出　　处：《太阳能学报》2023年第12期260-265,共6页Acta Energiae Solaris Sinica

基　　金：国家重点研发计划项目(2023YFC3081400);国家自然科学基金(41702371);中国矿业大学(北京)深部岩土力学与地下工程国家重点实验室开放基金课题(SKLGDUEK2130);地表过程与资源生态国家重点实验室开放课题(2022-KF-01)。

摘　　要：该文通过在系统中增加反光器,实现了仪器自振的测量,并依据仪器自振信号设计一种可自我矫正的新型激光多普勒测振系统,并与传统测振系统进行对比。新系统所测信号的频谱分析图明显更接近拾震器所测结果,均方误差平均值为0.08%。此外,新系统的测量误差平均降低了1.06个百分点,有效信号信噪比平均提升22.72 dB。新系统的测量精度会随着设备自振的增加有明显升高,但提升的效果会存在一定阈值限制。The paper realizes the measurement of instrumental self-oscillation by adding a reflector to the system,and designs a new self-correcting laser Doppler vibrometer system based on the instrumental self-oscillation signal and compares it with the traditional vibrometer system.The spectral analysis map of the signal measured by the new system is significantly closer to that measured by the vibration pickup,and the mean square error is 0.08%.In addition,the measurement error of the new system is reduced by 1.06%on average,and the effective signal-to-noise ratio is improved by 22.72 dB on average.The measurement accuracy of the new system increases significantly with the increase of self-oscillation of the equipment,but there is a certain threshold limitation of the enhancement effect.

关 键 词：风电机组 激光多普勒测振仪 自我矫正 信噪比 故障检测 

分 类 号：TN45[电子电信—微电子学与固体电子学]