Infrared and Laser Engineering, Volume. 50, Issue S2, 20210467(2021)
Research on signal acquisition and processing of lidar wind measurement system
Figures & Tables(11)
Fig. 2. Block diagram of signal acquisition and processing and data transmission module
Fig. 3. Timing simulation diagram under stream mode and block floating-point structure
Table 1. Parameter calibration of main components of lidar wind measurement system
View tableView in ArticleTable 1. Parameter calibration of main components of lidar wind measurement system
Name Parameters Value Fiber laser Wavelength/nm 1 550 Output power/mW 10 Line width/kHz 3 Balanced detector Responsivity/A·W−1 0.95 3 dB bandwidth/MHz 100 Telescope Focus distance/m 50 ADC Resolution/bit 14 Sampling rate/MHz 100
Table 2. Performance indicators of wind measurement system
View tableView in ArticleTable 2. Performance indicators of wind measurement system
Parameter Value Detection range/m 10-100 Wind speed measurement range/m·s−1 0-38 Spectral resolution/kHz 97.66 Wind speed measurement accuracy/cm·s−1 7.57 Wind speed data refresh frequency/Hz 8
Table 3. Resource occupancy rate of FPGA
View tableView in ArticleTable 3. Resource occupancy rate of FPGA
Device FPGA resources Used/Total Rate Cyclone IV Logic elements 5 978/114 480 5% Memory bits 411 086/3 981 312 10% Cyclone V Multiplier elements 40/532 8% Logic utilization 3 671/41 910 9% Memory bits 19 200/5 662 720 <1%
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Guangfu Li, Gangyang Nan, Dongyang Pan, Xue Bai, Shuai Liu, Zhihui Sun. Research on signal acquisition and processing of lidar wind measurement system[J]. Infrared and Laser Engineering, 2021, 50(S2): 20210467
Paper Information
Category: Image processing
Received: May. 10, 2021
Accepted: --
Published Online: Dec. 3, 2021
The Author Email: Nan Gangyang (slightcloud2004@aliyun.com)
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