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Development of a multi-point LDV by using semiconductor laser with FFT-based multi-channel signal processing

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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.

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Authors and Affiliations

  1. Department of Automotive Engineering, Tkayama College, Shimobayashi 1155, Takayama, Gifu 506, Japan, , , , , , JP

    T. Hachiga

  2. Department of Mechanical Engineering, Gifu University Yanagido 1–1, Gifu 501-11, Japan, , , , , , JP

    N. Furuichi, J. Mimatsu & M. Kumada

  3. Department of Mechanical Engineering, Keio University Hiyoshi 3-14-1, Kohoku-ku, Yokohama 223, Japan, , , , , , JP

    K. Hishida

Authors
  1. T. Hachiga
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  2. N. Furuichi
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  3. J. Mimatsu
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  4. K. Hishida
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  5. M. Kumada
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Received: 24 October 1996/Accepted: 30 June 1997

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Hachiga, T., Furuichi, N., Mimatsu, J. et al. Development of a multi-point LDV by using semiconductor laser with FFT-based multi-channel signal processing. Experiments in Fluids 24, 70–76 (1998). https://doi.org/10.1007/s003480050152

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  • DOI: https://doi.org/10.1007/s003480050152

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