农业机械学报2017，Vol.48Issue(4)：257-264,8.DOI:10.6041/j.issn.1000-1298.2017.04.033
土壤剖面水分线性尺度测量方法
Linear Scale Measurement Method for Soil Profile Moisture
摘要
Abstract
Pointing at the main problems existing in the utilization of point scale in soil moisture measurement,a linear scale measurement method was put forward and a sensor system of soil profile moisture information measurement was designed based on standing wave ratio method.With the help of a high frequency electromagnetic field simulation software HFSS and vector network analyzer,electric field distribution and impedance characteristics of sensor ring probe were analyzed and studied to determine the adaptation and sensitive areas of the ring probe.Two kinds of soil in different textures were taken as experimental samples,the output and the corresponding measured value of soil moisture sensors were executed polynomial fitting,and the results showed that the determination coefficient was above 0.99 and the steady and dynamic performances of sensors could satisfy the requirement of soil profile moisture measurement.The experiments of multi-layer moisture through the soil column showed the system could meet the soil profile moisture real-time measurements demand in linear scale and it had high measurement precision and stability.Meanwhile,the system was satisfied with needs of practical application and it had high aoolication oromotion value.关键词
土壤水分/线性尺度/实时测量系统Key words
soil moisture/linear scale/real-time measurement system分类
农业科技引用本文复制引用
高志涛,田昊,赵燕东..土壤剖面水分线性尺度测量方法[J].农业机械学报,2017,48(4):257-264,8.基金项目
国家自然科学基金项目(31371537)、北京市科技计划项目(Z116100000916012)和北京市共建项目专项 （31371537）
