摘要
介绍了一种根据土壤介电常数和传输线理论来测量土壤含水量的新型土壤水分测试仪,主要由土壤水分传感器和STC89C58为核心的单片机系统组成。实验研究表明:土壤种类、容重对传感器输出影响较小,可满足对大多数土壤的测量要求;土壤含盐量对传感器输出影响较大,如需测量含盐量较高的土壤,应对传感器进行特别标定。
A device of measuring soil moisture based on transmission line theory was designed;it was mainly made up of soil moisture sensor and MCU system.The result indicated that soil types and bulk density have limited impact on measurement result;the ionic conductivity of salts dissolved in the soil moisture has significant influence on soil water measurement,especially high salinity in soil,you will need to calibrate it for your specific soil,if you want to minimize the errors.
出处
《农机化研究》
北大核心
2011年第3期117-119,123,共4页
Journal of Agricultural Mechanization Research
基金
天津农学院科技发展基金项目(2007008)
天津市星火计划项目(09ZHXHNC0780009ZHXHNC06600)
关键词
土壤水分
介电常数
传输线
soil moisture
dielectric
transmission line
