分布式无线土壤电导率测量装置的设计

采用电流电压四端法设计一种多点无线传输的土壤电导率测量装置.硬件部分采用TDR-4传感器的四针微型探头可减小对溶质运移的扰动,且可高密度分布在土壤中,系统连接多路电导率探头和8位高精度数据转换器能够实现多通道土壤电导率测量,并通过无线模块实现系统规模的扩展,采用主从式结构测量显示平台能够完成数据采集、显示与存储功能,有效解决了多点土壤电导率实时监测的一致性问题.试验结果表明:系统具有良好的稳定性,土壤电导率与含盐量呈线性变化.

Design of Distributed Wireless Detecting Device for Soil Electrical Conductivity

This paper designed a soil conductivity measuring device with multi-point wireless transmission,using current-voltage four-probe method.Regarding the hardware,it used four-pin mini-probe of TDR-4 sensor which can reduce the disturbance on the solute transport,and can be set in the soil in high density.This device connects multiple electrical conductivity probe and 8-bit high precision data conservator,so it can realize multiple channel measurement of soil electrical conductivity.And it also achieves the exp...