Crop moisture detection device and method based on sensors

Abstract

The invention discloses a crop moisture detection device based on a plurality of sensors, comprising a signal acquisition unit, a signal transformation unit and a signal analysis unit, wherein the signal acquisition unit is used for acquiring soil moisture content signals, solar radiation signals, leaf temperature and leaf surrounding air temperature signals and environmental temperature and humidity signals; the signal transformation unit is used for transforming the signals acquired by the signal acquisition unit; and the signal analysis unit calculates leaf-air temperature difference by the leaf temperature and leaf surrounding air temperature signals acquired through sensors of a same type, eliminates errors caused by the traditional leaf temperature acquisition and provides an ecological data set based on the motion trend of water in a soil-plant-air system by combining with the other signals so as to provide data reference for plant moisture detection. The invention can be used for accurately and losslessly detecting the moisture content of crops for a long time.

Description

technical field [0001] The invention relates to the technical field of agricultural information, in particular to a multi-sensor-based crop water detection device and method. Background technique [0002] The use of water by plants is the movement of water from the soil to the plant body, and then from the plant body to the atmosphere [1] , during which transpiration plays an important driving role, and most of plant transpiration is carried out by leaves. [0003] According to the principle of energy balance, the change of leaf temperature difference depends on the intensity of solar net radiation and the size of crop transpiration. When the crop gets sufficient water supply, the leaves cool down due to transpiration, and the temperature drops below the temperature it can reach when the transpiration is inhibited; when the water supply decreases, the latent heat of transpiration decreases, the sensible heat increases, and the leaf temperature rise accordingly. [0004] F...

AI Technical Summary

Problems solved by technology

[0012] The shortcomings of the existing technology are: no attention has been paid to the utilization value of leaf air temperature difference for eliminating sensor errors, and the "plant- Atmosphere” link lacks the connection between leaf temperature and air temperature; the small-area and short-time collection makes the research data only applicable to the environment where the collection is located, and the versatility is poor; and the plug-in collection will cause damage to the crop leaves

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