一种新型云粒子探测仪的研制及初步观测结果分析(英文)  

New Cloud Droplet Probe and Its First Observation Results

作　　者：卜令兵[1] 高爱臻[1] 袁静[1] 郜海阳[1] 黄兴友[1] 

机构地区：[1]南京信息工程大学中国气象局气溶胶与云降水重点开放实验室,南京210044

出　　处：《光子学报》2014年第1期25-29,共5页Acta Photonica Sinica

基　　金：Opening Project of Shanghai Key Laboratory of All Solid-state Laser and Applied Techniques(Grant No.2012ADL04);the National Science Foundation of China(Grant No.40805016)

摘　　要：云粒子探测仪效率高、结构简单,在人工影响天气的活动中起着重要的作用.本文提出一种使用单模光纤耦合输出的685nm激光作为光源的新型云粒子探测仪.该仪器利用小孔光阑切割激光光束,使用相对均匀的中央部分的光束照亮云滴,采用具有两个高速A/D转换芯片(10M/S)的嵌入式计算机来不断地获取和处理云滴粒子信号,将所有云滴的原始数据存储在嵌入式计算机的固态磁盘中进行云滴粒径分布计算,并将计算结果发送到机舱内主计算机中即时显示.实验中,使用固定尺寸的标准粒子对仪器进行标定,获得不同直径云滴粒子信号变化幅度,从而获取该探测仪对云滴粒子的响应曲线;将探头安装在飞机上进行了现场观测实验,结果表明这种探头具有云滴测量能力.Cloud droplet probe plays an important role in activities of weather modification for its high efficiency and simple structure. In this paper, a new cloud droplet probe in which a single-mode 685 nm laser with fiber output coupling was used as a transmitter. A pinhole was used to cut the beam of the laser, so only the central part of the beam which was relatively homogenous illuminated cloud droplets. An embedded computer with two high speed A/D convert chips （10M/s） was used to acquire and process the signal from cloud droplets continually. All the raw data from cloud droplets was stored on the solid disk of embedded computer as well as the calculated size distribution was sent to the master computer in the carbin. By the calibration using standard particles with known index and sizes, the response curve of probe was obtained from which the magnitudes of cloud signal can be changed into sizes of droplets. In the end, the probe was installed on an airplane and field observation experiments were conducted. The results show that this probe is able to measure cloud droplets.

关 键 词：光学技术与仪器 探测器 散射 云滴粒子 标定 粒径谱分布 云水含量 

分 类 号：TH741[机械工程—光学工程]