Multi-electrode soil moisture detector

Abstract

The invention belongs to the field of detection equipment, and particularly relates to a multi-electrode soil moisture detector. The multi-electrode soil moisture detector comprises a supporting rod,a sensing probe, electrodes, a telescopic mechanism and a signal conversion device, wherein the sensing probe is arranged at the bottom end of the supporting rod, the two ends of each electrode are connected with the sensor probe and the signal conversion device respectively, the telescopic mechanism is arranged on the supporting rod to drive the multiple electrodes to retract or stretch out alongthe axis of the supporting rod at the same time, and the signal conversion device is arranged at the top end of the supporting rod. According to the multi-electrode soil moisture detector provided bythe invention, the problem of adaptability of different soils to the electrodes can be solved, the amplitude of the detection signal is correspondingly changed along with the change of the distance between the positive electrode and the two negative electrodes, and the amplitude of the detection signal is favorably improved, so that the resolution ratio of the soil moisture sensor is improved; the detector can adapt to different soil environments for continuous detection, and dynamically reflect the change of soil in real time.

Description

technical field [0001] The invention belongs to the field of detection equipment, and in particular relates to a multi-electrode soil moisture detector. Background technique [0002] Agricultural production occupies an important position in my country's economic development. Rational and efficient use of water resources will become one of the focuses of agricultural development. A large number of experimental studies have shown that the planting industries such as greenhouse vegetables, greenhouse flowers, and horticultural cultivation have high requirements on soil moisture. Unreasonable soil moisture will not only fail to make plants grow quickly, but will even cause plants to die due to drought and waterlogging. The agricultural economy has brought serious losses. In the efficient and reasonable use of water resources, soil moisture sensors play an important role. The soil moisture sensor provides high-precision data reference for efficient water use in agriculture. ...

AI Technical Summary

Problems solved by technology

Existing soil moisture sensors are widely used to measure the physical properties of substances through the dielectric constant, which can be sensitive to the moisture content of soil at different depths, and are easy to build portable soil moisture sensors, but the sensitivity is related to the length of the probe and the distance between the probes. Related, the positions of the probes between the existing soil moisture sensors are relatively fixed. In actual detection, different soil detection environments and different detection depths will affect the detection results of the soil moisture sensors. The distance between the probes is too small. As a result, the resistance increases when the sensor probe is inserted into the soil. If the distance is too large, the electric field of the output signal will be weakened, which is not conducive to the signal output. Therefore, the existing soil moisture sensor cannot meet the requirements of hardcover detection.

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