基于FPGA的半导体激光云高仪数据采集处理方法

大气与环境光学学报 ›› 2015, Vol. 10 ›› Issue (1): 39-45.

基于FPGA的半导体激光云高仪数据采集处理方法

王康, 张玉钧, 李胜, 尤坤, 刘文清

（中国科学院安徽光学精密机械研究所中国科学院环境光学与技术重点实验室，安徽合肥 230031）

收稿日期:2013-11-13 修回日期:2013-11-28 出版日期:2015-01-28 发布日期:2015-01-09
作者简介:王康（1988—），男(汉族)，安徽宿州人，硕士，主要从事光电技术方面的研究.

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

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

（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 Published:2015-01-28 Online:2015-01-09

摘要/Abstract

摘要：

由于大气不稳定性以及光电探测器的各种噪声和天空背景辐射，使半导体激光云高仪APD探测器接收到的后向散射信号信噪比较低，不能直接用于反演云层参数。所以针对后向散射信号的这种特点，提出了一种基于FPGA的半导体激光云高仪数据采集处理实现方案。该方案能够实现后向散射信号隔直流、高速采集、累积平均，与此同时还能完成整个系统发射、接收、数据存储和上传等复杂时序控制。经实验对比验证，该方案能够明显提高后向散射信号信噪比、实现大气云层参数的反演。

关键词: 后向散射信号, 隔直流, 高速采集, 累积平均

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

中图分类号:

TH765

王康张玉钧李胜尤坤刘文清. 基于FPGA的半导体激光云高仪数据采集处理方法[J]. 大气与环境光学学报, 2015, 10(1): 39-45.

WANG Kang, ZHANG Yu-Jun, LI Sheng, YOU Kun, LIU Wen-Qing. Data Collection and Processing Method of Semiconductor Laser Ceilometer Based on FPGA[J]. Journal of Atmospheric and Environmental Optics, 2015, 10(1): 39-45.