Optical 3D shape measurement for vibrating drumhead

Xianyu Su; Qican Zhang; Jian Li; Zeren Li

doi:10.1117/12.668179

20 January 2006 Optical 3D shape measurement for vibrating drumhead

Xianyu Su, Qican Zhang, Jian Li, Zeren Li

Proceedings Volume 6027, ICO20: Optical Information Processing; 60271P (2006) https://doi.org/10.1117/12.668179
Event: ICO20:Optical Devices and Instruments, 2005, Changchun, China

Abstract

In this paper, a whole-field and high-speed optical three-dimensional (3D) shape measurement for the vibration pattern of a drumhead based on Fourier Transform Profilometry (FTP) is presented and verified by experiment. A projected sinusoidal fringe pattern on the surface of measured drumhead is dynamically deformed with the vibration of the membrane and grabbed by a high-speed camera. The 3D shape deformation of the drumhead at each sampling instant can be recovered from demodulating the phase of this obtained sequence of fringe patterns. The vibration of the membrane of a Chinese drum has been measured with a high-speed sampling rate (1,000 fps) and a standard deviation (0.075 mm). This method should be helpful in studying the acoustic characteristic and the manufacture technique of the percussion instrument.

Citation Download Citation

Xianyu Su, Qican Zhang, Jian Li, and Zeren Li "Optical 3D shape measurement for vibrating drumhead", Proc. SPIE 6027, ICO20: Optical Information Processing, 60271P (20 January 2006); https://doi.org/10.1117/12.668179

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