High-frequency soil moisture measuring instrument

A soil moisture and measuring instrument technology, applied in the direction of material capacitance, etc., can solve the problems of low range and accuracy, high cost, hysteresis of resistance method, etc., and achieve the effect of compact structure, convenient operation and high cost performance.

Inactive Publication Date: 2011-01-05
HOHAI UNIV
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Problems solved by technology

However, the hysteresis, range and accuracy of the resistance method can only meet the measurement needs with low demand. Other met

Method used

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  • High-frequency soil moisture measuring instrument
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  • High-frequency soil moisture measuring instrument

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Embodiment Construction

[0013] With reference to the accompanying drawings, the structure of the high-frequency method soil moisture measuring instrument is to comprise non-metallic n (n ≥ 2, the present invention makes n=3) head square tooth thread sleeve 3, high-frequency electric converter 91, scattered field capacitive sensor, intelligent The display system 10 and the micropore have a dielectric constant of ε11 pieces; among them, the non-metallic n (n≥2, n=3 in the present invention) head square tooth thread sleeve is sequentially embedded in the metal A electrode 4, the metal B electrode 5, and the metal C For electrode 6, drill the electrode lead hole 41 on the A electrode terminal, drill the electrode lead hole 51 on the B electrode terminal, add the drill electrode lead hole 61 on the C electrode terminal, and pass the three signal leads through the A, B, and C electrode leads. The holes 7 are respectively led to the A electrode lead hole 41, the B electrode lead hole 51, and the C electrode ...

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Abstract

The invention provides a high-frequency soil moisture measuring instrument which comprises a nonmetallic n-head square thread bushing, a high-frequency electric converter, a scattered field capacitance sensor, an intelligent display system and a microporous through dielectric constant epsilon piece, wherein, three metal electrodes are sequentially embedded into the nonmetallic multi-head square thread bushing, lead holes of the electrodes are drilled on a three-electrode terminal, and three signal leads are led to the lead holes of the electrodes via lead through holes of the electrodes and welded firmly; the signal leads are correspondingly connected with a signal input terminal of the high-frequency electric converter, and a signal output terminal of the high-frequency electric converter is correspondingly connected with a signal input terminal in the intelligent display system; and a contact surface of the electrodes and the microporous through dielectric constant epsilon piece takes a half of the surface of the electrodes as a working surface, and the microporous through dielectric constant epsilon piece is arranged in the middle of the scattered field capacitance sensor and the measured soil. The measuring instrument has the advantages of simple and compact structure, being capable of realizing continuous measurement or discontinuous measurement of moisture at any point on a vertical section and conveniently obtaining a moisture distribution measuring result of the soil vertical section.

Description

technical field [0001] The invention relates to a high-frequency method soil moisture measuring instrument. It belongs to the technical field of soil moisture measurement. Background technique [0002] There are two types of methods in the field of soil moisture measurement: direct measurement and indirect measurement. The direct measurement method is actually the weighing method; the indirect measurement includes resistance method, y-ray method, neutron method, time domain (TDR) Resonance method, remote sensing method and so on. Direct measurement needs to take out soil samples, while indirect measurement does not need to take out soil samples. The former will destroy the soil structure and the latter will not destroy the soil structure and can be kept at a fixed point. The measurement of several points is convenient for measuring the moisture distribution of the vertical soil profile. However, the hysteresis, range and accuracy of the resistance method can only meet the ...

Claims

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Application Information

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IPC IPC(8): G01N27/22
Inventor 鞠琴郝振纯余钟波杨传国徐海卿张大伟朱长军佘超
Owner HOHAI UNIV
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