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Sensor for measuring direct solar radiation transmittance under different vegetation canopies

A sensor device, a technology of radiation transmittance, applied in transmittance measurement and other directions, can solve problems such as difficulty in adjusting the sampling spacing of instruments, and achieve the effect of strong application range, low cost and wide application range

Inactive Publication Date: 2011-09-07
BEIJING NORMAL UNIVERSITY
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  • Abstract
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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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  • Sensor for measuring direct solar radiation transmittance under different vegetation canopies
  • Sensor for measuring direct solar radiation transmittance under different vegetation canopies
  • Sensor for measuring direct solar radiation transmittance under different vegetation canopies

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Embodiment Construction

[0035] The invention relates to a sensor device for measuring the transmittance of direct solar radiation under different vegetation canopies, which is composed of two parts: an upper sensor device on the canopy and a sensor device under the canopy, which are connected through wireless communication. The above-canopy sensor device is placed on or outside the vegetation canopy, and the under-canopy sensor device is placed under the canopy.

[0036] 1. Assembly of the sensor device of the present invention:

[0037] The sensor device on the canopy is packaged with the measurement node in "a device for measuring vegetation structure parameters based on wireless sensor network", and no additional assembly process is required.

[0038] See figure 1 , figure 2 ,, image 3 , the assembly of the sensor device under the canopy:

[0039] Step 1: Put the nine light intensity sensor units 1 and the springs 8 between them on the threaded rod 7 .

[0040] Step 2: Extend the front end ...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/59
Inventor 屈永华董健姜富斌王锦地
Owner BEIJING NORMAL UNIVERSITY
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