This paper introduces a new type of portable 2D laser vibrometer. Based on laser Doppler effect, using laser self-mixing technology, achieves the two-dimensional in-plane vibration measurementof the vibration object, has excellent frequency and phase response, meeting the demand of high precision and high speed measurement. The paper introduces the working principle of the vibrometer, for the problem that the angle is variable when the vibrometer is in practical application, puts forward a correction method for the angle of two laser beams, and large numbers of experimental results show that, the correction method is feasible and accurate.
Key words
laser vibrometer /
Doppler effect /
laser self mixing /
two-dimensional in-plane vibration /
non-contact measurement
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References
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