Measurement of Soil Moisture with a Tube Access Soil Moisture Sensor Based on Standing Wave Ratio Theory
For measuring soil moisture of different layers, a tube access soil moisture based on standing wave ratio (SWR) theory has been designed. This paper introduced the working principle and the probe structure of soil moisture sensor. By experimental research in field, the soil moisture measured by SWR-4 tube access soil moisture sensor was compared with that determined by standard oven drying method. The experiment result shows that the tube access soil moisture sensor has good repeatability,good correlation with gravimetric value and high accuracy. Through real time monitoring in the field, it shows that the measurement results accord with liquid movement law.
Soil moisture Standing wave Sensor Tube access
FENG Lei WANG Yiming
College of Information & Electrical Engineering China Agricultural University, Beijing, P.R.China 100083
国际会议
2008 International Conference on IAEA(2008农业信息化、自动化与电气化国际会议)
镇江
英文
722-726
2008-11-01（万方平台首次上网日期，不代表论文的发表时间）