光学精密工程2017，Vol.25Issue(4)：842-849,8.DOI:10.3788/OPE.20172504.0842
基于单帧双脉冲成像的降水微物理特征测量仪
Precipitation micro-physical characteristics sensor based on double-pulse in single frame imaging
摘要
Abstract
In order to realize synchronize measurement of size, shape, fall velocity and other micro-physical characteristics of precipitation particles, an imaging method based on the double exposures in one frame was proposed, and a Precipitation Micro-physical Characteristics Sensor (PMCS) was established.The PMCS prototype consisted of pulse light source, planar array image sensor, signal processing and control unit with a Digital Signal Processor (DSP) as the core and data processing unit.Then an image restoration method based on the point spread function and capture probability correction approach using exposure parameters were investigated and verified with calibration balls.Finally, the PMCS was employed to field experiments in Nanjing, where the measurement results were compared with the one of OTT distrometer.The results indicate that the PMCS is able to measure the shape, axis ratio, size and fall velocity of raindrops effectivity accurately and synchronously.The measured values of those characteristics are hihly consistent with empirical models.The raindrop size distribution and rainrate measured by PMCS and OTT disdrometer show good consistency for the average error of rainrate is 1.57 mm/h and the correlation coefficient can reach 96 %.The proposed instrument can provide comprehensive measurement of micro-physical features and realize unattended long-term stable operation, thus having a promising prospect in the fields such as atmospheric physics, numerical weather forecasting model, hydrological research and etc..关键词
降水粒子/微物理特征/同步测量/单帧双曝光/面阵图像传感器Key words
precipitation particle/micro-physical feature/synchronize measurement/double exposures in one frame/array image sensor分类
天文与地球科学引用本文复制引用
刘西川,高太长,胡云涛,舒小健,翟东力..基于单帧双脉冲成像的降水微物理特征测量仪[J].光学精密工程,2017,25(4):842-849,8.基金项目
国家自然科学基金科学仪器基础研究专款项目(No.41327003) （No.41327003）
国家自然科学基金青年项目(No.41505135) （No.41505135）
江苏省自然科学基金青年项目(No.BK20150708) （No.BK20150708）
