摘要
发展为地质灾害预测预报所需用的岩土层含水量及渗透力测试仪，并与气候雨量、地质灾害成灾规律联系。是我国地质灾害监测预报的发展趋势。该监测仪系统采用TDR（Time Domain Refiectometry）技术原理、方法研制的仪器，通过波导棒探针发射的电磁波射入岩土层，测量电磁波脉冲从波导棒的起点传播到接收未端的反射电压值，此反射电压值与岩土体本身含水量介电常数有函数关系，经过计算转换为测点岩土体积含水量。实时测量和采集地质灾害岩土层含水量及渗透力参数。该系统适用于地质灾害监测区野外的使用，具有测量深度深、可测介面硬层、自动采集、存卡、无线遥测以及无人值守等性能特点。
The objective of this research is to develop the instrument of measuring rock and soil moisture content and permeability. These parameters, together with precipitation inducing geologic disaster occurrence are useful for geologic disaster forecast. This system mainly adopts the TDR （Time Domain Reflectometry） method. The electromagnetic wave that wave-guide club probe emit rip into rock and soil measure echo voltage, which is the electromagnetic wave pulse spread to incept end from jumping-off point. There is functional correlation between the echo voltage value and dielectric constant in rock and soil containing water or moisture. Therefore, volume moisture content and permeability of soil and rock can be obtained in real time. This monitoring system can work in field and automatically collect data from both surface and subsurface.
出处
《中国地质灾害与防治学报》
CSCD
2005年第B12期23-27,共5页
The Chinese Journal of Geological Hazard and Control
关键词
含水量
时域反射
介电常数
波导棒
moisture content
permeability
Time Domain Reflectometry （TDR）
dielectric constant
wave-guide club
