Lidar data acquisition system for detecting atmospheric temperature and extinction coefficient

Wenbo Chen; Pan Guo; Siying Chen; Yinchao Zhang

doi:10.1117/12.904813

30 November 2011 Lidar data acquisition system for detecting atmospheric temperature and extinction coefficient

Wenbo Chen, Pan Guo, Siying Chen, Yinchao Zhang

Proceedings Volume 8201, 2011 International Conference on Optical Instruments and Technology: Optoelectronic Measurement Technology and Systems; 82011G (2011) https://doi.org/10.1117/12.904813
Event: International Conference on Optical Instruments and Technology (OIT2011), 2011, Beijing, Beijing, China

Abstract

Digital data acquisition system is a key part of the whole lidar system, which plays an important role in ensuring detecting accuracy and is the emphasis of this paper. Lidar system could detect both Raman and Mie backscattering signal simultaneously. A digital data acquisition system is designed to capture the signal in this paper. A FPGA chip is used as an essential part in the digital data acquisition system to control time sequence and process capturing data. Then the data is transmitted into the computer through a USB interface, and displayed in the real-time by dedicated software. Three channels of the system can be programmed separately to measure Mie and Raman scattering signal simultaneously within a single measurement. Moreover, acquisition resolution can be chosen among 15m, 30m and 45m. Meanwhile, some other detecting parameters can also be specified, such as height layers and so on. In the aspect of communicating with PC, a Cypress USB CY7C68013A chip is used in this design. The interface is set to work in Slave FIFO mode in the USB firmware, by which FPGA can control USB easily, just like controlling a normal external FIFO. Usually, USB interface can transmit the data faster and more convenient than other PC interfaces. Results of experiments demonstrate that the digital data acquisition system works correctly and accurately.

Citation Download Citation

Wenbo Chen, Pan Guo, Siying Chen, and Yinchao Zhang "Lidar data acquisition system for detecting atmospheric temperature and extinction coefficient", Proc. SPIE 8201, 2011 International Conference on Optical Instruments and Technology: Optoelectronic Measurement Technology and Systems, 82011G (30 November 2011); https://doi.org/10.1117/12.904813

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KEYWORDS

Data acquisition

Field programmable gate arrays

LIDAR

Data storage

Data transmission

Photon counting

Mie scattering

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