Split-type tensionmeter connected through soft pipes and used for measuring soil water potential

Abstract

The invention discloses a tensionmeter connected through soft pipes and used for measuring soil water potential. The tensionmeter comprises a clay pipe. A water injection soft pipe and a pressure guiding soft pipe are packaged on the upper end of the clay pipe respectively. The pressure guiding pipe is connected with a water storage air collecting pipe for storing water and collecting air. A cover is arranged on the water storage air collecting pipe. A vacuum pressure meter or a digital pressure sensor is arranged on a lateral end of the water storage air collecting pipe. When the tensionmeter is used as a traditional tensionmeter, the vacuum pressure meter is used, and during collecting of digital signals, users only need to replace the vacuum pressure meter with the digital pressure sensor, and other portions are not required to be changed. The collected signals are digital signals and are favorable for follow-up storage processing and the like. The tensionmeter is simple in structure, easy to manufacture and convenient to use, simultaneously gives consideration to a traditional and conventional use method, overcomes some defects of a traditional tensionmeter, reserves the advantages of low price and simple operation, enables measurement results to be correct, and is favorable for scientific measurement.

Description

technical field [0001] The invention belongs to the technical field of measurement and control, and relates to an agricultural measuring instrument, in particular to a tensiometer connected by a hose for measuring soil water potential. Background technique [0002] Soil moisture is an important indicator for the study of agricultural drought and crop drought, and is an important parameter for farmland irrigation management, regional hydrological conditions research, and water balance calculation of watersheds. Especially with the increasingly prominent water crisis, the research on water-saving agriculture is highly valued at home and abroad, and the soil moisture content has become a frequently measured item in the research of water-saving agriculture. The research on the measurement method is mainly reflected in how to measure the soil moisture content quickly, accurately and economically, which is of great significance for timely ascertaining the soil moisture status, so ...

AI Technical Summary

Problems solved by technology

[0005] 1. The measurement accuracy is low, and the readings are all carried out by mechanical instruments, which is not conducive to the digital collection and storage of data

[0006] 2. Irregular water injection is required. Since the soil tensiometer is a plexiglass or plastic hard rod structure, the soil tensiometer will be greatly disturbed during water injection, which will damage the soil structure and greatly affect the reliability of the measurement results.

[0007] 3. Since the soil tensiometer is a plexiglass or plastic hard rod structure, if it is installed in the soil as a whole, water will infiltrate along the hard pipe wall, which will easily cause wall effect

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