Low Cost Vibrometer Utilizing Laser Diode Self-Mixing with Sound Card Controlled by LabVIEW

Abstract:

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A compact and versatile vibrometer is designed based on self-mixing laser diode vibrometry interference to measure the oscillation amplitude of a piezoceramics (PZT). A fraction of the light emitted by the laser diode (LD) is reflected by the PZT, and then mixes with the light inside the cavity, causing a modulation of the laser output. The self-mixing signal is detected by the photodiode accommodated in the LD package and acquired by a data acquisition and processing system based on sound card and LabVIEW. Amplitude of the PZT is detected by fringe counting. According to results of test, this device can measure the vibration signal with a measurement accuracy of λ/2. The measurable oscillation amplitude range from 0.325 um to 6.5um

Info:

Periodical:

Advanced Materials Research (Volumes 189-193)

Edited by:

Zhengyi Jiang, Shanqing Li, Jianmin Zeng, Xiaoping Liao and Daoguo Yang

Pages:

906-910

DOI:

10.4028/www.scientific.net/AMR.189-193.906

Citation:

Z. Huang et al., "Low Cost Vibrometer Utilizing Laser Diode Self-Mixing with Sound Card Controlled by LabVIEW", Advanced Materials Research, Vols. 189-193, pp. 906-910, 2011

Online since:

February 2011

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Price:

$35.00

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