Cost-effective and full-field method for measuring vibration of loudspeaker membrane using fringe projection

Jian Wang; Yong Li; Zhiliang Zhang; Peng Gao

doi:10.1117/12.2071281

13 November 2014 Cost-effective and full-field method for measuring vibration of loudspeaker membrane using fringe projection

Jian Wang, Yong Li, Zhiliang Zhang, Peng Gao

Author Affiliations +

Proceedings Volume 9276, Optical Metrology and Inspection for Industrial Applications III; 92761M (2014) https://doi.org/10.1117/12.2071281
Event: SPIE/COS Photonics Asia, 2014, Beijing, China

Abstract

We proposed a cost-effective and full-field method for measuring vibration of loudspeaker using general industrial camera and fringe projection. The loudspeaker is excited by a sinusoidal signal. The fringe pattern is projected on the measured loudspeaker membrane that is dynamically deformed. Then the deformed fringes are captured by a camera. A trigger generation circuit is designed to control the camera. The Fourier Transform Profilometry (FTP) is adopted for 3D shape reconstruction. The validity of this method is approved by experiments. The cost of proposed measurement system is dramatically lower than that using high-speed camera.

Citation Download Citation

Jian Wang, Yong Li, Zhiliang Zhang, and Peng Gao "Cost-effective and full-field method for measuring vibration of loudspeaker membrane using fringe projection", Proc. SPIE 9276, Optical Metrology and Inspection for Industrial Applications III, 92761M (13 November 2014); https://doi.org/10.1117/12.2071281

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