Development of a multi-point LDV by using semiconductor laser with FFT-based multi-channel signal processing |
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| Authors: | T Hachiga N Furuichi J Mimatsu K Hishida M Kumada |
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| Institution: | (1) Department of Automotive Engineering, Tkayama College, Shimobayashi 1155, Takayama, Gifu 506, Japan, JP;(2) Department of Mechanical Engineering, Gifu University Yanagido 1–1, Gifu 501-11, Japan, JP;(3) Department of Mechanical Engineering, Keio University Hiyoshi 3-14-1, Kohoku-ku, Yokohama 223, Japan, JP |
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| Abstract: | An advanced multi-point LDV with FFT-based multi-channel signal processing, using a 1-bit FFT approach has been developed.
A semiconductor laser light sheet, a 96-channel plastic optical fiber array, 16-Si APDs and a 16-channel capacious (1 M word)
memory system with 1 bit were used in order to attain 16 individual Doppler frequencies simultaneously. Several experiments
were conducted in this study to test the performance of the advanced multi-point LDV. We confirmed that the advanced multi-point
LDV could be a useful, compact and inexpensive optical measuring instrument for obtaining the information of a velocity field
as a function of time and position.
Received: 24 October 1996/Accepted: 30 June 1997 |
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