A Thermal Time Domain Reflectometer Probe Applied to Soil with High Salinity

Abstract

The invention discloses a heat time-domain reflectometer probe applicable to high-salinity soil. The heat time-domain reflectometer probe comprises an electronic glue handle (9), wherein a sliding switch (7), a coaxial cable (8), four long steel pins (1, 2, 3 and 4) and two short steel pins (5 and 6) are arranged on the electronic glue handle (9); the four long steel pins (1, 2, 3 and 4) define an isosceles triangle; the second long steel pin (2) is positioned at the vertex of the isosceles triangle; an insulating layer is formed on an outer layer of the second long steel pin by coating; the first long steel pin (1) and the third long steel pin (3) are positioned at two ends of the bottom edge of the isosceles triangle; the fourth long steel pin (4) is positioned in the midpoint of the bottom edge of the isosceles triangle; the two short steel pins (5 and 6) are symmetrically arranged on the left and right sides of the fourth long steel pin (4). The heat time-domain reflectometer probe has the advantages that the moisture of the high-salinity soil can be measured; by virtue of a long probe, the spatial variability of a result is reduced; the heat time-domain reflectometer probe has combined functions of two probes, so that measurement accuracy, convenience and quickness are ensured; the heat time-domain reflectometer probe can be used for simultaneously measuring water content, salinity, water flow flux and heat parameters, and facilitates research on coupled transportation of water, heat and salt of soil.

Description

technical field [0001] The invention relates to the technical field of soil physical characteristic monitoring devices, in particular to a thermal time domain reflectometer probe applied to soil with high salt content. Background technique [0002] TDR (TimeDomainReflectometry, Time Domain Reflectometry) was first used in cable fault detection. Canadian scientist Topp first realized the application of TDR in soil moisture measurement in 1980. After decades of development, the TDR system has made considerable progress. progress. Now TDR manufacturers mainly include TektronixInc., SoilmoistureEquipmentCrop., CampbellScientificInc. in the United States, EasyTestLtd. in Poland, EnvironmentalSensorsInc. in Canada, and IMKOGmbH in Germany and so on. According to different needs, many people have made improvements on the basis of the above-mentioned TDR system, but almost all of them have improved the probe part, such as changing the number, length, diameter, spacing and arrangeme...

AI Technical Summary

Problems solved by technology

Soil with high salinity has high electrical conductivity, and the energy of electromagnetic waves attenuates quickly, making it more difficult to measure the moisture content and salinity of freeze-thaw saline soil

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