In this paper we presented a method for whole-field three-dimensional (3D) shape measurement and vibration analysis of a vibrating woofer's cone based on Fourier transform profilometry (FTP). A sequence of dynamic deformed fringe images can be grabbed by high-speed CCD camera and saved on disk rapidly. By Fourier transform, filtering, inverse Fourier transform and unwrapping these phase maps in 3D phase space, we can obtain the shape of the rapid vibrating woofer's cone at different time. The results of our experiment indicate that the method, presented in this paper, can efficiently deal with the surface shape measurement for rapid motion object and will be a promising one with the development of high-speed frame grabber.
[1]
Wenjing Chen,et al.
Optical 3-D shape and deformation measurement of rotating blades using stroboscopic structured illumination
,
2005
.
[2]
M. Takeda,et al.
Fourier transform profilometry for the automatic measurement of 3-D object shapes.
,
1983,
Applied optics.
[3]
Jian Li,et al.
An Improved Fourier Transform Profilometry
,
1989,
Other Conferences.
[4]
Xianyu Su,et al.
Fourier transform profilometry:: a review
,
2001
.
[5]
X. Su,et al.
High-speed optical measurement for the drumhead vibration.
,
2005,
Optics express.