Topic
Laser Doppler vibrometer
About: Laser Doppler vibrometer is a research topic. Over the lifetime, 6319 publications have been published within this topic receiving 76068 citations.
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TL;DR: In this paper, a conceptual design using computational fluid dynamics (CFD) and microelectro-mechanical systems (MEMS) fabrication has been performed to develop an industrial inkjet head for micro-patterning on printed circuit boards.
41 citations
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TL;DR: In this paper, a nonlinear ultrasonic modulation technique based on dual laser excitation is proposed for fatigue crack detection, where two pulse lasers are shot on the target specimen for ultrasonic generation.
41 citations
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20 May 2002TL;DR: In this paper, a method of detecting a leak of low-density gas from an enclosure containing a rotating storage disc includes monitoring a signal which varies in response to variations in the concentration of the low density gas in the enclosure.
Abstract: A method of detecting a leak of low-density gas from an enclosure containing a rotating storage disc includes monitoring a signal which varies in response to variations in the concentration of the low-density gas in the enclosure. Additional quantities of the low-density gas are added to the enclosure when the monitored signal indicates that the concentration has dropped below a predetermined level. Monitoring the concentration of the low-density gas may include monitoring actual concentration levels of the gas using a pressure sensor located within the enclosure or monitoring disc mode vibration amplitudes using an accelerometer attached to the enclosure. Indirect monitoring of the vibration amplitudes may also be accomplished using sensors such as a laser Doppler vibrometer, a capacitance probe or the servo head position feedback circuitry found within a disc drive or a dedicated servo track writer.
41 citations
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TL;DR: A new method for accurate reconstruction of the displacement information from an interferometric signal is described, which allows calculation of the correct target movement at extremely low signal-to-noise ratios (SNRs) and in the presence of disturbances.
Abstract: A new method for accurate reconstruction of the displacement information from an interferometric signal is described. The method also allows calculation of the correct target movement at extremely low signal-to-noise ratios (SNRs) and in the presence of disturbances. The proposed method is experimentally validated in the case of a self-mixing laser vibrometer developed for the characterization of an ultrasound solder.
41 citations
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TL;DR: In this article, the authors used a laser Doppler vibrometer to detect changes in fruit texture and the development of physiological disorders affecting texture based on changes in surface vibrations.
41 citations