Sensor for measuring direct solar radiation transmittance under different vegetation canopies

Abstract

The invention relates to a sensor for measuring the direct solar radiation transmittance under different vegetation canopies, and the sensor provided by the invention comprises an upper canopy sensor and a lower canopy sensor, wherein the upper canopy sensor and the lower canopy sensor are connected through wireless communication; the upper canopy sensor is arranged at the upper parts or outsides of the vegetation canopies; the lower canopy sensor is arranged at the lower parts of the vegetation canopies; the shape of the upper canopy sensor is a rectangle and three light intensity sensor units are additionally arranged on the common wireless sensor network measuring nodes in a vegetation structure parameter measuring device based on a wireless sensor network; the shape of the lower canopy sensor is a long rod-shaped box; and the lower canopy sensor comprises a light intensity sensor unit, a threaded rod, a spring, a waterproof bayonet, a lower canopy sensor box body, a cable signal connector, a knob, a lower canopy sensor box cover, an eight-core cable and a front-end box cover, and the relative position of the 9 components is adjustable. The sensor provided by the invention has the advantages of low manufacturing cost, low energy consumption, wide application range and wide application prospects in the technical fields of agriculture and ecology.

Description

(1) Technical field [0001] The invention relates to a sensor device for measuring direct solar radiation transmittance under different vegetation canopies, which is related to the data collection of vegetation canopy structural parameters and belongs to the technical field of agriculture and ecology. (2) Technical background [0002] In the field of agricultural ecology, the instruments used to measure the transmittance of the solar radiation canopy are divided into two categories. One is represented by tubular pyranometers and light quantum instruments. Do the ratio to calculate the solar radiation canopy transmittance. The other type is represented by the "measuring plant canopy image analyzer", which obtains the sky dome hemisphere image under the canopy through a fisheye lens, and obtains the solar radiation canopy transmittance by binarizing the image. Among them, the tubular pyranometer is generally about 30*500mm tubular body, the surface layer is a high transmittanc...

AI Technical Summary

Problems solved by technology

In addition, in the process of measuring the vegetation transmittance, the distance between the sensors under the canopy is fixed. Therefore, they have a limitation, that is, it is difficult to adjust the sampling distance of the instrument according to the sparseness of the vegetation coverage density. Therefore, their applicable vegetation density types have certain limitations

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