Nondestructive testing method and device for nitrogen and water of crops

Abstract

The invention discloses a nondestructive testing method and a nondestructive testing device for nitrogen and water of crops, and relates to the technical field of crop nutrient diagnosis. The device is characterized by comprising a multisensor information acquisition device, a portable computer, a sensor detecting frame and an instrument container, wherein an infrared temperature measuring sensor, an irradiance sensor and a temperature and humidity sensor are connected with a data acquisition card through a signal cable; the data acquisition card, two digital industrial view cameras and an input end of a power supply module are connected with the portable computer through a USB bus; the power supply module boosts the voltage of a USB to DC24V for supplying power to the sensors; the sensordetecting frame can adjust the height according to the crops; multisensor information is uploaded to the portable computer; and the visible light and the near infrared image features of a plant canopy are extracted, canopy temperature and illumination information are merged, an environment error is eliminated, and the nitrogen and the water of the field crops can be rapidly and nondestructively detected on line.

Description

technical field [0001] The invention relates to a small portable non-destructive detection device for crop nutrition, especially capable of making full use of multi-sensing information such as visible light, near-infrared multispectral images, canopy temperature, canopy illumination, ambient temperature, and ambient humidity of crops in a natural environment. Using information fusion technology, rapid non-destructive diagnosis is made for the two main factors that restrict the yield and quality of crops, nitrogen and water. Background technique [0002] At present, the known nitrogen nutrition diagnosis of crops is mainly based on routine laboratory tests, mainly including morphological diagnosis, leaf color card method, chemical diagnosis method, fertilizer window application diagnosis method and enzymatic diagnosis method. The water stress detection of crops is also mainly based on laboratory analysis. These traditional testing methods usually cause damage to crops and af...

AI Technical Summary

Problems solved by technology

However, due to the interaction between nitrogen and water, the detection process is greatly affected by environmental factors such as crop canopy structure, soil background spectrum, atmospheric window, temperature and humidity. Therefore, only spectral technology, or visible light visual images, or near-infrared A single detection technology such as visual images or the temperature difference between the crowns of plants is not enough to accurately and comprehensively reflect the information of crop nitrogen and water stress

Images