一种激光雨滴谱仪小雨滴检测方法

被引：10

作者：

刘俊 ^{[1
]}

马尚昌 ^{[1
,2
]}

杨笔锋 ^{[1
]}

机构：

[1] 成都信息工程学院电子工程学院

[2] 中国气象局大气探测重点开放实验室

来源：

气象科技 | 2013年 / 04期

关键词：

激光雨滴谱仪; 小雨滴检测; 数字锁相放大; OMAP3530;

D O I：

10.19517/j.1671-6345.2013.04.002

中图分类号：

P414 [大气探测仪器及设备];

学科分类号：

摘要：

针对激光雨滴谱仪中接收端信号非常微弱、小雨滴信号容易受噪声干扰的特点,为提高系统的信噪比和小雨滴检测能力,基于微弱信号检测原理,优化前端模拟电路设计,采用数字锁相放大(DLIA)技术,构建了以OMAP3530的DSP Core为核心的数字锁相放大器。系统结构简单、易于实现,可以避免模拟器件的零漂、非线性等问题。仿真结果表明:这种数字锁相放大器能实现微弱信号的恒定放大,抑制了对带外噪声的放大,提高了信噪比(SNR),能有效提高激光雨滴谱仪的小雨滴检测能力。

引用

页码：603 / 607+613 +613

页数：6

共 17 条

[1] Structured neural networkapproach for measuring raindrop sizes and velocities. Denby B,Gole P,Taniewicz J. Proceedings of the IEEE Signal Processing Society Workshop . 1998
[2] InterpolationAlgorithm for Optical Raindrop Counting. Ma Shangchang,Yang Bifeng,He Jianxin,et al. InternationalConference on Information Engineering and Computer . 2009
[3] Weak Signal Detection Method ofAdaptive Digital Lock-in Amplifier Based on Particle Swarm OptimizationAlgorithm. Shiwen Jiang,Tianqi Zhang,Shaosheng. The Ninth International Conference on Electronic Measurement&Instruments.ICEMI . 2009
[4] Signal Simu-lation for Optical Spherical Drop Counting. Ma Shangchang,Yang Bifeng,He Jianxin,et al. InternationalConference on Information Technology and Computer Science . 2009
[5] An Optical Disdrometer for Measuring Size and Velocity of Hydrometeors. Loffler-Mang. M,Joss J. Journal of Atmospheric and Oceanic Technology . 2000
[6] Z-R Relationshipfrom the Particle Size and Velocity（Parsivel）optical disdrome-ter and its Application in Estimating Areal Rainfall. Chen Qian,NiuShengjie,Zhang Yu,et al. The2nd International Conference on In Bioinformatics and Biomed-ical Engineering . 2008
[7] A new optical instrument for simultaneous measurement of raindrop diameter and fall speed distributions. D Hauser,P Amayenc,B Nutten,P Waldteufel. J At Ocean Technol . 1984
[8] 基于光学方法测量降水的关键技术研究. 高太长,刘西川,刘磊,等. 中国科学技术协会 . 2010
[9] Development of a Digital Lock-In Amplifier forOpen-Path Light Scattering Measurement. Davies R,Meuli G. IEEE Symposiumon Industrial Electronics and Application . 2010
[10] 不同雨量计测值误差分析
李耀宁
陶立新
黄湘
[J]. 气象科技, 2011, 39 (05) : 670 - 672

← 1 2 →