High-precision multifunctional soil sensor

Abstract

The invention discloses a high-precision multifunctional soil sensor. The high-precision multifunctional soil sensor is characterized in that an 'O'-shaped sealing ring of a silicon-pressure core body is arranged in an armored sleeve; a pressure joint is arranged at the top end of the armored sleeve by threads; a pressing ring is connected with the silicon-pressure core body in a tightly pressing manner by threads and the pressure joint; a signal processing circuit board is fixed on the pressing ring by installing screws; a shell and the pressure joint are connected into a whole body by argon-arc welding; silica gel is potted and sealed in the whole body; a porous cup is connected to one end of the armored sleeve closely; a hollow round pipe is arranged in the porous cup; deionized water in the hollow round pipe overflows outwards by the porous cup; a sensing contact is arranged at the other end of the armored sleeve and is used for sensing the internal pressure change of the hollow round pipe. According to the high-precision multifunctional soil sensor disclosed by the invention, the soil moisture characteristic curve is directly outputted, the measurement procedure is simple, and the measurement result is objective and accurate, and the soil sensor has the advantages that the permeation performance is good, the volume is small, the weight is light, an all-stainless-steel water-tight structure is adopted, pressure and corrosion are resisted, the stability is good, the comprehensive precision is high and the errors are fewer and the like.

Description

technical field [0001] The invention belongs to the technical field of sensors, and in particular relates to a multifunctional soil sensor with high precision. Background technique [0002] Soil is an important part of the natural ecological environment and is closely related to human life and production activities. As a porous medium, soil is composed of three phases: solid, liquid, and gas. Minerals and organic matter constitute its solid phase structure, and water and air fill the pores in the structure. In agricultural production activities, soil water is an important guarantee for plant survival. It not only affects the effective use of fertilizers by crops, but also is related to a series of reactions in the soil. Soil moisture content is an important parameter that determines soil physical, chemical and biological properties and processes. The water potential of soil water determines its moisture availability. At present, the commonly used method for measuring soil...

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Problems solved by technology

[0004] In view of the above problems, the purpose of the present invention is to provide a multifunctional soil sensor with high precision, which has the characteristics of miniaturization, corrosion resistance, wide measurement range and good stability, and can monitor the water pressure in the soil by means of real-time monitoring. detection to solve the problem of cumbersome, time-consuming and labor-intensive determination procedures caused by separate measurement of traditional equipment

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