SELF DENOISING TECHNIQUE FOR LASER DOPPLER VIBROMETER

Du Yan; Liu Jingnan; Xie Mowen; Zhang Xiaoyong; Huo Leichen

doi:10.19912/j.0254-0096.tynxb.2022-1308

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Acta Energiae Solaris Sinica ›› 2023, Vol. 44 ›› Issue (12) : 260-265. DOI: 10.19912/j.0254-0096.tynxb.2022-1308

SELF DENOISING TECHNIQUE FOR LASER DOPPLER VIBROMETER

Du Yan, Liu Jingnan, Xie Mowen, Zhang Xiaoyong, Huo Leichen

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Abstract

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.

Key words

wind turbines / laser Doppler vibrometer / self adjusting / signal to noise ratio / fault detect

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Du Yan, Liu Jingnan, Xie Mowen, Zhang Xiaoyong, Huo Leichen. SELF DENOISING TECHNIQUE FOR LASER DOPPLER VIBROMETER[J]. Acta Energiae Solaris Sinica. 2023, 44(12): 260-265 https://doi.org/10.19912/j.0254-0096.tynxb.2022-1308

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