Application and Design for an Imaging Measurement System Based on Photodiode Array

Abstract

Abstract:

To realize the precipitation particle imaging and measurement in the airborne condition, an imaging and measurement system was developed based on photodiode array. The measurement system is composed of an optical system, a hardware system and a software system, in which the optical system can shape the laser beam and image the particles; the hardware system is composed of a front-end signal conditioning circuit and an FPGA controlling circuit, and mainly function in the particle image acquisition and signal processing; the software system contains two parts in FPGA and PC respectively, and realize the particle image compression, display and storage. Calibration in laboratory shows that the system’s measurement range is in 60-7400um, with a resolution in 60um. Field campaign result indicates that the system can meet the requirement of precipitation particle imaging and measurement under the flying condition.

Key words: laser technology, imaging measurement system, photodiode array, precipitation particles, airborne probe

CLC Number:

V248.1

HUANG Minsong, LEI Hengchi, CHEN Jiatian, ZHANG Xiaoqing. Application and Design for an Imaging Measurement System Based on Photodiode Array[J]. J4, 2015, 32(5): 620-626.

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