Volume 33 Issue 5
Sep 2019
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ZHANG Min, YANG Jun, SHI Guokai, JIANG Wanchun, WANG Zhao, HUI Hailong. A Compensation Method of Photonic Doppler Velocimeter Based on Two Laser Sources[J]. Chinese Journal of High Pressure Physics, 2019, 33(5): 053201. doi: 10.11858/gywlxb.20180659
Citation: ZHANG Min, YANG Jun, SHI Guokai, JIANG Wanchun, WANG Zhao, HUI Hailong. A Compensation Method of Photonic Doppler Velocimeter Based on Two Laser Sources[J]. Chinese Journal of High Pressure Physics, 2019, 33(5): 053201. doi: 10.11858/gywlxb.20180659

A Compensation Method of Photonic Doppler Velocimeter Based on Two Laser Sources

doi: 10.11858/gywlxb.20180659
  • Received Date: 15 Oct 2018
  • Rev Recd Date: 08 Nov 2018
  • In order to solve the problem of large range negative velocity measurement in dynamic response measurement of structure, a photonic Doppler velocimetry (PDV) measurement system based on two laser sources is designed. Compared with the single laser source PDV system based on acoustic optical modulator, the range of negative velocity measurement is greatly improved. However, it is found in the explosion experiment that the displacement baseline drift and oscillation are caused by the wavelength fluctuation of the laser source. For this reason, one reference reflector is introduced to generate the background signal which is used to compensate the displacement. Then, the data compensation algorithm is studied. The experimental results show that the displacement baseline drift after compensation is in the order of micron. PDV based on two laser sources and the compensation method are feasible and effective.

     

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