Design method, design device and control method for deep soil moisture measuring device

Abstract

The invention discloses a design method, a design device and a control method for the deep soil moisture measuring device. The advantages of an earth borer are utilized, a soil moisture sensor is embedded in the earth borer; a probe hole is formed in the wall of a ring-shaped attaching pipe, and the soil moisture sensor can movably extend or contract; a curved surface separating board which can move up and down and can block or open the probe hole is arranged between a conveying trough and the probe hole. The design method, the design device and the control method for the deep soil moisture measuring device are simple and ingenious in conception and convenient to operate, and are capable of embodying the advantages of an automatic telescopic sensor probe, so that the demand of burying in the deep soil can be guaranteed; a pressure sensor is designed, so that the overload work of the soil moisture sensor can be avoided; a wireless communication module is designed, so that the remote transmission and control can be realized.

Description

technical field [0001] The invention relates to the technical field of measuring soil moisture content, in particular to a design method, a device and a control method of a field deep soil moisture measuring device. Background technique [0002] Soil moisture is one of the important soil fertility factors, and its content has a direct impact on the growth of agricultural and forestry plants. In agricultural and forestry production, the long-term monitoring and timely acquisition of soil moisture content information is an important basic data for precision irrigation. [0003] At present, most of the measurement devices for soil moisture content in the field are based on the dielectric method, using a soil moisture sensor with a needle structure to measure soil moisture content. This type of sensor has the characteristics of simple geometric structure and convenient manufacture, but there are also some application problems The problem is mainly manifested in the limitation o...

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Problems solved by technology

[0003] At present, most of the measurement devices for soil moisture content in the field are based on the dielectric method, using a soil moisture sensor with a needle structure to measure soil moisture content. This type of sensor has the characteristics of simple geometric structure and convenient manufacture, but there are also some application problems The problem is mainly manifested in the limitation of the determination of deep soil moisture content

Due to the dual effects of probe strength and soil gravel, the length of the probe cannot be too long to penetrate from the soil surface to the lower layer, thus limiting the determination of the moisture content of deep soil and gravel soil

Although the probe can be buried in the measured depth by excavating the soil profile, the excavation and backfilling process of the profile will seriously damage the natural state of the soil and affect the migration characteristics of water in the soil. It is difficult to accurately reflect the true characteristics of soil moisture, which seriously reduces the representativeness of the data; at the same time, the process of profile excavation and backfilling is labor-intensive and time-consuming

Along with the limitations of device development, it also brings difficulties to the measurement of deep soil moisture. There is no better way to accurately measure the moisture of deep soil, especially hard and gravel soil in the field, making the research of deep soil a blank

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