SOIL-MOISTURE MEASUREMENT BY AN IMPROVED CAPACITANCE TECHNIQUE .1. SENSOR DESIGN AND PERFORMANCE
SOIL-MOISTURE MEASUREMENT BY AN IMPROVED CAPACITANCE TECHNIQUE .1. SENSOR DESIGN AND PERFORMANCE
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DOI：
10.1016/0022-1694(87)90194-6
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发表时间：
1987-08-15
影响因子：
6.4
通讯作者：
BATY, AJB
中科院分区：
文献类型：
--
作者：
DEAN, TJ;BELL, JP;BATY, AJB
人们早就认识到介电常数是测量土壤含水量的一个灵敏指标。测量电场中土壤介电常数的一种方法是将土壤作为电容器介电常数的一部分。介绍了一种工作频率为150 MHz的新型电容传感器；它利用先进的电子元件技术，为现场测量提供了一个稳定、灵敏的探头。该传感器已被开发为土壤湿度测量综合系统的一部分，该系统还包括接入管安装和适当校准技术。这里给出了仪器性能的详细信息，并在第二部分报告了现场校准的结果。
It has long been recognised that dielectric constant is a sensitive measure of the moisture content of soil. One method of measuring the dielectric constant of soil in the field is to incorporate the soil as part of the dielectric of a capacitor. A new capacitance sensor operating at 150 MHz is described; it makes use of advances in electronic component technology to give a stable and sensitive probe for in-situ field measurements. The sensor has been developed as part of an integrated system of soil moisture measurement comprising in addition a technique for access tube installation and appropriate calibraton. Details of instrumental performance are given here and results of the field calibrations reported in Part II.