Measuring apparatus for synchronously and real-time measuring for three parameters of soil

Abstract

The invention relates to a composite sensor and a measuring device for synchronously and real-time measuring three soil parameters. The sensor includes: a cone head for measuring the soil cone index, and a sensor for soil moisture content and soil conductivity compounded on the cone head. The measuring equipment includes: the main column, the base used to support the main column, the guide rail set on the main column, the sensor installation table that goes up and down along the guide rail; the controller and the battery box fixed on the main column, and the controller has a signal input interface With the signal output interface, the stepper motor that drives the sensor installation table to travel along the guide rail, the position sensor that measures the travel depth of the sensor, and the hollow rod and pressure sensor used to support the sensor; the battery that provides energy for the sensor and the stepper motor, installation The traveling wheels on the lower side of the main column are installed on the data collector platform on the top of the main column. The equipment of the present invention measures the high-frequency impedance, high-frequency loss and cone force index of the cone in real time synchronously, and then determines the soil moisture content, soil electrical conductivity and compaction degree according to the relevant multivariable mathematical model, and realizes the synchronization of the three soil parameters Measured in real time.

Description

technical field [0001] The invention relates to a sensor for measuring soil parameters and its supporting equipment, in particular to a composite sensor and its measuring equipment for synchronously and real-time measuring soil profile moisture content, electrical conductivity and compaction degree. Background technique [0002] In the process of agricultural production, soil not only provides physical support for plant growth, but also serves as a nutrient bank for plant growth. A large number of research results have shown that soil moisture content and compaction are two crucial physical parameters that affect the growth of crops. Water is the lifeblood to ensure the growth of crops. A series of reactions in the soil, energy and material exchange are all related to water, which is directly related to crop yield and quality. Soil compaction is not only closely related to the germination rate of seeds and root development of plants, but also directly affects the migration ...

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Problems solved by technology

[0006] In particular, it should be pointed out that the TDR method (Time Domain Reflectometry), which is commonly used to measure soil moisture content, takes a long time to measure, and requires a time interval of tens of seconds between two measurements, which cannot be achieved. Real continuous real-time measurement, and there are certain requirements for the length of the transmission wire, and there are many problems when it is fused with the pressure sensor

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