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搜索结果: 1-14 共查到time domain reflectometry相关记录14条 . 查询时间(0.049 秒)
In this paper, the wave propagation characteristics of single-phase medium voltage (MV) cross-linked polyethylene (XLPE) power cable are determined using time domain reflectometry (TDR) measurement te...
In earlier research, we developed a system to measure the volumetric water content in the branches and trunks of satsuma mandarin (Citrus unshiu Marcow.) by portable Time Domain Reflectometry (TDR).
During recent years, time domain reflectometry (TDR) has proved to be a valuable tool for both water content (θ) and bulk electrical conductivity (σa) measurements. To allow resident solute concentrat...
Since peat soil differs from mineral soil in several respects, mineral-soil calibration functions for time domain reflectometry (TDR) are not necessarily applicable. This paper evaluates a number of...
Two quasi steady-state solute transport experiments were carried out in a loamy sand under field conditions. The flux was 40 mm/d in experiment 1 and 18.7 mm/d in experiment 2. Both water content (8...
研究了用于土壤参数测试的时域反射仪(TDR)系统原理与电路实现方法。根据系统设计要求设计出时域反射仪样机,该样机脉冲发生电路产生140ps上升沿的时域脉冲,接收电路等效采样精度为8.69ps,并设计了时域反射仪系统控制程序,给出了程序的系统控制和数据处理流程图。利用研制的TDR样机对两种土壤样本的相对介电常数进行了测试,反演了土壤样品的体积含水率,同时利用采集波形反演计算出不同湿度土壤样品的体积含...
The volumetric water content (VWC) in the branches and trunks of satsuma mandarin (Citrus unshiu Marcow.) was measured using a stainless nail a sensor probe and a portable time domain reflectometry (T...
Time domain reflectometry (TDR) was used to monitor soil water conditions and to evaluate infiltration characteristics associated with rainfall into a volcanic-ash soil (Hydric Hapludand) with a low ...
The electrical conductivity (EC) of a medium invaded by TDR sensors can be estimated from the impedance of a TDR reflectogram. Four categories of sensor were tested in salt solutions and the impedance...
Time domain reflectometry [TDR] was used to investigate the spatial and temporal variation in surface soil water dynamics under a number of types of vegetation, including both trees and crops grown in...
We present a numerical model for time domain reflectometry (TDR) signal propagation in dispersive dielectric materials. The numerical probe model is terminated with a parallel circuit, consisting of a...
Nine time-domain reflectometry (TDR) probes, 2 to 10 cm long, were evaluated by comparing their measurement accuracy of TDR-pulse travel time in a sand and sandy loam soil, and electrical conductivity...
A field setup was developed to measure soil moisture content on ten different positions using the Time Domain Reflectometry (TDR) technique. The setup has been designed to meet specific field demands...
The EU 5th Framework project 慡EQUID?aims, by measuring and analysing different seafoods during different storage conditions, to develop an instrument which will allow the determination of quality or f...

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