2D 视频雨滴谱仪

一 用途

国际上的降水粒子测量设备，此设备可以实时测量单个降水粒子（如，雨、雪、雹等）的大小、形状、聚合状态、方向和降落速度等。通过设备软件，还可以计算降水率、降水量和降水粒子谱等。这些数据是充分理解大气降水过程的关键要素，是研究和标定云雷达、降达的必备工具，适用于气象和环境、电信和波传播、工业应用等领域。

二 原理

传感器是由摄像头和背光源组成，摄像头将对测量区域的图像进行线形扫描，将采集区域内的图像传输到电子单元内处理存储，然后用专业配套软件进行一系列分析。

三 组成

设备由测量单元、笔记本电脑、供电单元三部分构成。

四 产品特点

l 每个雨滴的前视图

l 每个雨滴的侧视图

l 垂直降落速度

l 每个粒子的时间戳

l 雨滴直径

l 估计雨滴的水平速度

l 令3D重建成为可能

l 降雨率与时间图

l 雨滴粒子分布图

l 垂直速度与等量直径图

l 扁率与直径图

l 评估单个降水粒子相态组成(固态、液态、融化、冰冻等)

l 小粒子分辨能力可达0.17mm，无ZD粒子尺度限制

l 时间戳ZG分辨率达18μs

软件主屏幕

单个粒子图

降雨率与时间图

垂直速度与等量直径图

雨滴水平速度图

垂直速度与等量直径分布图

五 技术参数

l 垂直方向分辨率：优于0.17 mm，veloc. < 10 m/s

l 垂直速率准确性：优于4 %，veloc. < 10 m/s

l 采样区域面积：100×100 mm²

l 尺寸：960 mm × 960 mm × 890 mm

l 测量单元与电脑远距离：100 m

l 电脑功率：600 W

六 应用领域

七 应用案例

极端气候条件下应用2DVD观测降雪数据

八 参考文献

l Measurements of Precipitation Characteristics by a New Distrometer

M.Schönhuber1), H.E.Urban1), J.P.V.Poiares Baptista2), W.L.Randeu3) and W.Riedler 3)

1) Institute for Applied Systems Technology, JOANNEUM RESEARCH, Graz/Austria

2) ESA/ESTEC (XEP), Noordwijk, The Netherlands

3) Institute of Communications and Wave Propagation, Technical University Graz/Austria

l 2D VIDEO DISDROMETER: A STUDY OF DIFFERENT CLIMATIC REGIMES

YARITZA MEJIAS-ROLON

Undergraduate Student

University of Puerto Rico at Mayagűez

Mayagűez, Puerto Rico

DR. V.N. BRINGI

Professor

Colorado State University

Fort Collins, Colorado

l An example of computational approach used for aerodynamic design of a rain Disdrometer Un exemple de méthode de calcul utilisée pour le dessin aérodynamique d’un disdromètre de pluie

EMAD HABIB, Graduate Research Assistant, Iowa Institute of Hydraulic Research, The University of Iowa, Iowa City, IA, 52242 USA

WITOLD F. KRAJEWSKI, Professor, Iowa Institute of Hydraulic Research, The University of Iowa, Iowa City, IA, 52242 USA

l WEATHER RADAR VERSUS 2D-VIDEO-DISTROMETER DATA

M. Schönhuber1), H.E. Urban1), J.P.V. Poiares Baptista2), W.L. Randeu3) and W. Riedler3)

1) Institute for Applied Systems Technology, JOANNEUM RESEARCH, Graz/Austria

2) ESA/ESTEC (XEP), Noordwijk, The Netherlands

3) Institute of Communications and Wave Propagation, Technical University Graz/Austria

l OBSERVATIONS OF WINTER STORMS WITH 2-D VIDEO DISDROMETER AND POLARIMETRIC RADAR

Kyoko Ikeda*, Edward A. Brandes, and Guifu Zhang

National Center for Atmospheric Research, Boulder, Colorado

Real-time measurements and analyses of precipitation micro-structure and dynamics W. L. Randeu1,2, M. Sch¨onhuber1, and G. Lammer1

1Institute of Applied Systems Technology, Joanneum Research GmbH, Graz/Austria

2Institute of Communications and Wave Propagation, Technical University Graz, Austria

l DROP SIZE DISTRIBUTIONS IN OKINAWA, JAPAN, FROM 2D-VIDEO DISTROMETER AND C-BAND POLARIMETRIC RADAR

V.N. Bringi (1), K. Nakagawa (2), M. Thurai (1,2), H. Hanado (2), T. Iguchi (2)

Colorado State University, (2) Communications Research Laboratory, Japan

(thurai@crl.go.jp/fax: +1-970-491-2249)

l Investigation of rainfall microstructure and variability using vertically pointing radar and disdrometer M. Diederich1, S. Crewell1, C. Simmer1, and R. Uijlenhoet2

1Meteorological Institute University of Bonn

2Department of Environmental Sciences Wageningen University

l Z-R (Radar Reflectivity-Rain rate) relationships derived from Czech Distrometer data

Fiˇser

Institute of Atmospheric Physics, AS CR, Bocni II, 1401, 141 31 Prague, Czech Republic

l A Method For Estimating Rain Rate And Drop Size Distribution From Polarimetric Radar Measurements

Guifu Zhang, J. Vivekanandan, and Edward Brandes

National Center for Atmospheric Research

Research Application Program

P. O. Box 3000, Boulder, Colorado 80307

Tel: 303-497-8402, Fax: 303-497-8401

l Sensitivity of 5-cm Wavelength Polarimetric Radar Variables to Raindrop Axial Ratio and Drop Size Distribution

T. D. KEENAN

Bureau of Meteorology Research Centre, Melbourne, Victoria, Australia

L. D. CAREY

Colorado State University, Fort Collins, Colorado

D. S. ZRNIC´

NOAA/National Severe Storms Laboratory, Norman, Oklahoma

P. T. MAY

Bureau of Meteorology Research Centre, Melbourne, Victoria, Australia

(Manuscript received 16 November 1999, in final form 11 May 2000)

l Spurious power-law relations among rainfall and radar parameters By A. R. JAMESON1¤ and A. B. KOSTINSKI

1RJH Scienti. c, Inc., USA

2Michigan Technological University, USA

(Received 3 March 2001; revised 21 January 2002)

l EXPERIMENTAL AND NUMERICAL STUDIES OF SMALL-SCALE RAINFALL MEASUREMENTS AND VARIABILITY

W. F. Krajewski, A. Kruger and V. Nespor Iowa Institute of Hydraulic Research, The University of Iowa, Iowa City, Iowa 52242, USA

l NOTES AND CORRESPONDENCE When is Rain Steady

R. JAMESON RJH Scientific, Inc., El Cajon, California B. KOSTINSKI

Department of Physics, Michigan Technological University, Houghton, Michigan 24 November 2000 and 27 July 2001