Volume 48 Issue 12
Dec.  2019
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Jiang Shan, Sun Dongsong, Han Yuli, Han Fei, Zhou Anran, Zheng Jun, Tang Lei. Design and test of laser anemometer based on continuous wave coherence detection[J]. Infrared and Laser Engineering, 2019, 48(12): 1203008-1203008(7). doi: 10.3788/IRLA201948.1203008
Citation: Jiang Shan, Sun Dongsong, Han Yuli, Han Fei, Zhou Anran, Zheng Jun, Tang Lei. Design and test of laser anemometer based on continuous wave coherence detection[J]. Infrared and Laser Engineering, 2019, 48(12): 1203008-1203008(7). doi: 10.3788/IRLA201948.1203008

Design and test of laser anemometer based on continuous wave coherence detection

doi: 10.3788/IRLA201948.1203008
  • Received Date: 2019-06-06
  • Rev Recd Date: 2019-07-05
  • Publish Date: 2019-12-25
  • In order to implement measurement of the close wind field accurate and real-time, a laser anemometer based on CW coherence detection was designed with eye-safe band 1.55 m. The system optical path employed the all-fiber structure to enhance the operational stability. The telescope adopted a coaxial transmission structure with effective aperture of 70 mm and focusing distance of 80 m. The backscattered signals were processed by using the on-board programmable gate array chip on the A/D capture card and spectral centroid algorithm was also designed for wind velocity estimation. The anemometer realized high real-time and reliability. The long-term radial wind speed measurement results proved that the laser anemometer output signal was stable with a time resolution of 1 s and the lower limit of the wind measurement range was about 0.915 m/s. Compared with a calibrated pulsed coherent wind lidar, the correlation coefficient of wind speed data measured by the two devices was 0.997, the standard deviation was 0.090 m/s, and the maximum difference was 0.480 m/s.
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    [2] Jia Xiaodong, Sun Dongsong, Shu Zhifeng, et al. Optimal design of the telescope in coherent lidar and detection performance analysis[J]. Atca Optica Sinica, 2015, 35(3):0301001. (in Chinese)贾晓东, 孙东松, 舒志峰, 等. 相干激光雷达中望远镜的优化及探测性能分析[J]. 光学学报, 2015, 35(3):0301001.
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Design and test of laser anemometer based on continuous wave coherence detection

doi: 10.3788/IRLA201948.1203008
  • 1. School of Earth and Space Science,University of Science and Technology of China,Hefei 230031,China;
  • 2. School of Physics and Material Engineering,Hefei Normal University,Hefei 230031,China

Abstract: In order to implement measurement of the close wind field accurate and real-time, a laser anemometer based on CW coherence detection was designed with eye-safe band 1.55 m. The system optical path employed the all-fiber structure to enhance the operational stability. The telescope adopted a coaxial transmission structure with effective aperture of 70 mm and focusing distance of 80 m. The backscattered signals were processed by using the on-board programmable gate array chip on the A/D capture card and spectral centroid algorithm was also designed for wind velocity estimation. The anemometer realized high real-time and reliability. The long-term radial wind speed measurement results proved that the laser anemometer output signal was stable with a time resolution of 1 s and the lower limit of the wind measurement range was about 0.915 m/s. Compared with a calibrated pulsed coherent wind lidar, the correlation coefficient of wind speed data measured by the two devices was 0.997, the standard deviation was 0.090 m/s, and the maximum difference was 0.480 m/s.

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