LIU Qing-quan, ZHU Jun-feng, DU Hong, et al. Design of FPGA precipitation particle measurement system based on piezoelectric effect[J]. 2014, 33(3): 85-88.
LIU Qing-quan, ZHU Jun-feng, DU Hong, et al. Design of FPGA precipitation particle measurement system based on piezoelectric effect[J]. 2014, 33(3): 85-88. DOI: 10.13873/j.1000-97872014.03.002.
并利用拟合所得的各路系统响应函数与各粒子响应函数实现对粒子的测量。系统实现信号全量程采集的同时有效降低了非线性误差。实验结果表明:该系统对于粒子直径观测误差小于±0.1 mm
具有量程宽、精度高、响应快、粒子判别准确等特点。
Abstract
Precipitation particle measurement is an important section in meteorological observation.Propose a new method of measurement
which is based on piezoelectric sensor
and a kind of FPGA-based precipitation particle signal acquisition and processing system is designed.This system acquires signal through synchronized multi- channel
and use response function of each channel system and response function of each particle obtained by fitting to realize measurement on particle.The system not only realizes full scale acquisition but also effectively reduces nonlinear error.Experimental results indicate that observation error of the system on particle diameter is less than ± 0.1 mm and it has features of wide scale
high precision
fast response and accurate particle discrimination.