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Instantaneous velocity displacement and contour measurement by use of shadow moiré and temporal wavelet analysis

หน่วยงาน Nanyang Technological University, Singapore

รายละเอียด

ชื่อเรื่อง : Instantaneous velocity displacement and contour measurement by use of shadow moiré and temporal wavelet analysis
นักวิจัย : Tay, Cho Jui , Quan, Chenggen , Fu, Yu , Huang, Yuanhao
คำค้น : DRNTU::Science::Physics::Optics and light.
หน่วยงาน : Nanyang Technological University, Singapore
ผู้ร่วมงาน : -
ปีพิมพ์ : 2547
อ้างอิง : Tay, C. J., Quan, C. G., Fu, Y., & Huang, Y. H. (2004). Instantaneous velocity displacement and contour measurement by use of shadow moiré and temporal wavelet analysis. Applied Optics, 43(21), 4164-4171. , 0003-6935 , http://hdl.handle.net/10220/6472 , http://dx.doi.org/10.1364/AO.43.004164
ที่มา : -
ความเชี่ยวชาญ : -
ความสัมพันธ์ : Applied Optics
ขอบเขตของเนื้อหา : -
บทคัดย่อ/คำอธิบาย :

A temporal wavelet analysis method is proposed for velocity, displacement, and three-dimensional surface-profile measurement of a continuously deforming object by use of the shadow moire´ technique. A grating is placed close to a deforming object, and its shadow is observed through the grating. The moire´ fringe patterns, generated by the interference of the grating lines and their shadows, are captured by a high-speed CCD camera with a telecentric gauging lens. Instantaneous frequency of gray-value variation is evaluated point by point with the continuous wavelet transform. From the instantaneous frequency of each point on the object, the velocity, displacement, and high-quality surface profile at different instants can be retrieved. In this application, two specimens are tested to demonstrate the validity of the proposed method: One is a small coin with a rigid body motion, and the other is a simply supported beam subjected to a central point load. The results are compared with those obtained from temporal Fourier-transform and mechanical stylus methods.

บรรณานุกรม :
Tay, Cho Jui , Quan, Chenggen , Fu, Yu , Huang, Yuanhao . (2547). Instantaneous velocity displacement and contour measurement by use of shadow moiré and temporal wavelet analysis.
    กรุงเทพมหานคร : Nanyang Technological University, Singapore.
Tay, Cho Jui , Quan, Chenggen , Fu, Yu , Huang, Yuanhao . 2547. "Instantaneous velocity displacement and contour measurement by use of shadow moiré and temporal wavelet analysis".
    กรุงเทพมหานคร : Nanyang Technological University, Singapore.
Tay, Cho Jui , Quan, Chenggen , Fu, Yu , Huang, Yuanhao . "Instantaneous velocity displacement and contour measurement by use of shadow moiré and temporal wavelet analysis."
    กรุงเทพมหานคร : Nanyang Technological University, Singapore, 2547. Print.
Tay, Cho Jui , Quan, Chenggen , Fu, Yu , Huang, Yuanhao . Instantaneous velocity displacement and contour measurement by use of shadow moiré and temporal wavelet analysis. กรุงเทพมหานคร : Nanyang Technological University, Singapore; 2547.