基于虚拟仪器和小波降噪的植物电信号测量系统的设计  

Design of the Measurement System for Week Electrical Signal based of Virtual Instrument and Wavelet De-noising

作　　者：陈薇[1] 翁绍捷[1] 王玲玲[1] 储春华[1] 刘虹[1] 

机构地区：[1]海南大学机电工程学院,海南儋州571737

出　　处：《中国农机化》2010年第5期94-97,共4页Chinese Agricul Tural Mechanization

基　　金：海南省自然科学基金项目(807028)

摘　　要：根据植物电信号特殊性,采用PMD-1208LS数据采集卡和HB-854A型四通道电压前置放大器、以LABVIEW为软件开发平台,结合MATLAB混合编程,运用小波软阈值降噪技术,设计了植物电信号采集虚拟仪器试验系统。并在一定的室温下,设定3倍放大,构建100HZ的低通滤波,同时对橡胶苗进行电位采集。经过初步分析,经过小波软阈值降噪后的橡胶苗电位信号为1mV左右,功率谱主要分布在0～20Hz,在10Hz处尤为突出。According to the plant electrical signal particularity,this design has developed the plant electrical signal gathering hypothesized instrument pilot system with the use of PMD-1208LS data acquisition card and HB-854A four channel voltage Pre-amplifier. The design takes LABVIEW as the software development platform,combined with MATLAB mix programming,and exert wavelet soft threshold de-noising. It simultaneously carries on electric potential gathering to the rubber seedling under the same temperatures by establishing 3 time of enlargements and constructing 100HZ low-pass filtering. The preliminary analysis shows that the rubber seedling electric potential signal is about 1mV after undergoing the wavelet soft threshold value noise reduction. Power spectrum ranges mostly from 0 to 20Hz,especially predominant at 10Hz.

关 键 词：虚拟仪器 橡胶苗电信号 LABVIEW 小波软阈值降噪 

分 类 号：S126[农业科学—农业基础科学]