Journal of the Korean Society for Precision Engineering (한국정밀공학회지)
- Volume 16 Issue 1 Serial No. 94
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- Pages.61-67
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- 1999
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- 1225-9071(pISSN)
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- 2287-8769(eISSN)
A Study on the Robust Real-Time Signal Processor of a Laser Doppler Vibrometer for Noises
노이즈에 둔감한 레이저 진동계측기용 실시간 신호처리 장치에 관한 연구
- Published : 1999.01.01
Abstract
A laser Doppler vibrometer based on the laser heterodyne interferometry is employed to measure the vibration velocity of vibrating objects. In this paper, we propose a real time analog signal processor of a laser Doppler vibrometer to reduce the degradation of Doppler signals mainly caused by environmental noises. In the proposed real time signal processor of an laser Doppler vibrometer, a pre-processor and a logical motion direction detector are designed to reduce the detection errors of the object motion direction. Also, a noise detection and rejection circuit is designed to reject the unfiltered noises.
Keywords