Multilayer soil moisture content meter based on frequency dielectric reflection (FDR) measurement

Abstract

The invention discloses a multilayer soil moisture content meter based on frequency dielectric reflection (FDR) measurement, which comprises a sleeving cylinder. One end of the sleeving cylinder is provided with an extension rod, the tail end of the extension rod is fixedly provided with a hollow connecting rod, and the surface of the connecting rod is in threaded connection with an adjusting short rod. A state prompting groove and a multifunctional detection groove are formed in the surface of the adjusting short rod, processing supporting plates with the same diameter are installed on the inner wall of the sleeving cylinder, the tail end of a connecting bolt is detachably connected with a top cover plate, and a debugging plate is installed on the surface of the side, away from the sleeving cylinder, of the top cover plate. According to the invention, by arranging the adjusting short rod and controlling the extension distance of the internal electric telescopic rod, the extrusion effect on the pressure test plate is adjusted, the contact state of the metal guide sheet and the metal spring is changed, and the working state of the multifunctional detection groove on the surface of the adjusting short rod is adjusted; the auxiliary device realizes multi-node data acquisition and can adjust the distance between data acquisition at the same time, so that the auxiliary device is more convenient and flexible.

Description

technical field [0001] The invention relates to the technical field of soil moisture content measurement, in particular to a multilayer soil moisture content meter based on frequency dielectric reflection FDR measurement. Background technique [0002] The multi-layer soil moisture meter with FDR function is a kind of using the electromagnetic pulse principle to measure the apparent dielectric constant of the soil according to the propagation frequency of the electromagnetic wave in the medium, so as to obtain the soil volumetric moisture content. FDR is simple, safe and fast Accurate, fixed-point continuous, automatic, wide range, less calibration and other advantages, by detecting the moisture content of the soil, it can provide detection data for agricultural irrigation, slope collapse monitoring and early warning, grassland pasture, scientific experiments and other fields, so as to better develop it play an auxiliary judgment effect. [0003] The defects in the existing ...

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Problems solved by technology

The utility model not only realizes the portable function of the multi-layer soil water content detector, realizes the limit function when the multi-layer soil water content detector is in use, but also realizes the protection function of the multi-layer soil water content detector ", but the device failed to realize the flexible adjustment of the distance between the detection positions, which resulted in the device being unable to make differential adjustments for shallow and deep soil layers;

[0005] 2. The comparative document CN209356492U discloses a soil water content measuring instrument device, "the soil water content measuring instrument device, when in use, can drive the rotating sleeve to move downward by first pressing down the rotating knob, so that the rotating sleeve can The limit rod at the lower end fits with the limit groove, and then starts to turn the rotary knob, which drives the rotating sleeve to rotate inside the fixed sleeve, thereby driving the rotating tube at the lower end to rotate inside the fixed tube, so that the threaded rod slowly moves inside the fixed tube. Lower, so that the moisture measuring probe at the front end of the threaded rod is in contact with the inside of the ground to measure the moisture content of the soil, and when not in use, the moisture measuring probe can be separated from the ground by turning the knob in the opposite direction and placed inside the sealed tube. In this way, the moisture measurement probe can be protected", but when the device performs soil moisture content detection operation, it fails to perform diversified processing for the detection content, resulting in a relatively single detection result of the device;

When traveling through the vegetation, since the entire detector is columnar without any external equipment, it is difficult for the vegetation to entangle with it.” However, when the device performs soil moisture content detection operations, it lacks corresponding positioning tracking devices and data timing transmission devices, resulting in After the device is lost, it is difficult to find it, which increases the purchase cost of the device, and the data collected by the device cannot be uploaded in time, making it difficult to realize the construction of the database and the subsequent data sharing.

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