Journal of Atmospheric and Environmental Optics ›› 2015, Vol. 10 ›› Issue (1): 39-45.

• 论文 • Previous Articles     Next Articles

Data Collection and Processing Method of Semiconductor Laser Ceilometer Based on FPGA

WANG Kang, ZHANG Yu-jun, LI Sheng, YOU Kun, LIU Wen-qing   

  1. (Key Laboratory of Environment Optics and Technology, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Science, Hefei 230031, China)
  • Received:2013-11-13 Revised:2013-11-28 Online:2015-01-28 Published:2015-01-09

Abstract:

Due to atmospheric instability, various noise and sky background radiation of photoelectric detector, the semiconductor laser ceilometer APD detector receives the backscatter signal with low signal noise ratio (SNR) which cannot be directly used for parameter inversion of cloud. For the characteristics of the backward scattering signal, a data collection and processing scheme of the semiconductor laser ceilometer based on FPGA was proposed.This scheme can achiev that the DC blocking of backward scattering signal, high-speed data acquisition, cumulative average, and at the same time it can complete complex sequential control, such as the whole system transmitting and receiving, data storage and upload. Compared with the experimental verification, the scheme can obviously increase the SNR of the backward scattering signal, and achieve the parameter inversion of atmospheric cloud.

Key words: backscattering signal, DC blocking, high speed acquisition, cumulative average

CLC Number: