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Incident light path structure of crop growth information sensor

A crop growth and sensor technology, applied in the direction of instruments, scientific instruments, scattering characteristics measurement, etc., can solve the problem of insufficient light reflection in the sensor, so as to facilitate the installation and disassembly of the shell, reduce the loss of light, and reduce the measurement error Effect

Pending Publication Date: 2021-11-23
JIANGSU ACADEMY OF AGRICULTURAL SCIENCES +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention solves the problem of insufficient light reflection in existing sensors by setting the middle part of the optical path as an arc structure, overcomes the deficiencies of the prior art, and achieves the effect of improving data accuracy

Method used

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  • Incident light path structure of crop growth information sensor
  • Incident light path structure of crop growth information sensor
  • Incident light path structure of crop growth information sensor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The incident optical path structure of the crop growth information sensor, the end of the sensor housing 1 is equipped with an incident optical path cover body 2, and the incident optical path cover body 2 is provided with an optical path channel 3, an optical filter 4, and a receiving receiver behind the optical filter 4. device 5. The optical filter 4 allows light to pass through and irradiate into the inner cavity of the housing 1 , and the receiver 5 is used to receive the optical signal transmitted through the optical filter 4 . The front end of the optical path channel 3 is provided with a filter 4 for light to pass through and illuminate the inner cavity of the housing 1, and the rear end is provided with a receiver 5 for receiving the optical signal passing through the optical filter 4; the middle part of the optical path channel 3 is an arc The shape structure means that at least one section between the receiver 5 and the filter 4 is curved. In this solution, t...

Embodiment 2

[0036] This embodiment 2 improves the housing 1 on the basis of the embodiment 1, so as to reduce the temperature drift caused by the sensor being disturbed by the temperature outdoors.

[0037] The housing 1 is made of heat insulating material, and its outer wall is also coated with a metal reflective layer.

[0038] Others are the same as above, and will not be repeated here.

Embodiment 3

[0040] Embodiment 2 continues to make changes to the housing 1 on the basis of Embodiment 1 or 2. The housing 1 is also provided with an inner housing 10, and a vacuumed cavity is provided between the housing 1 and the inner housing 10 to reduce heat transfer, thereby reducing the problem of decreased measurement accuracy caused by temperature drift.

[0041] Others are the same as above, and will not be repeated here.

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PUM

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Abstract

The invention relates to an incident light path structure of a crop growth information sensor, which comprises an incident light path cover body arranged at the end part of a shell, at least one light path channel is arranged in the incident light path cover body, and the front end of the light path channel is provided with a light filter for light to penetrate and irradiate to the inner cavity of the shell. A receiver used for receiving optical signals penetrating through the optical filter is arranged at the rear end of the optical filter; and the middle of the light path channel is of an arc-shaped structure. According to the invention, the middle part of the light path channel is of an arc-shaped structure, so that the problems that incident light cannot be completely received due to insufficient light reflection in an existing sensor and the sensor is easily influenced by temperature to generate temperature excursion are solved, the defects in the prior art are overcome, and the effect of improving the accuracy of monitoring data is achieved.

Description

technical field [0001] The invention belongs to the field of optical sensor monitoring, in particular to an incident light path structure of a crop growth information sensor. Background technique [0002] The crop growth information sensor receives the incident light of the sun and the reflected light of the crop to obtain the reflectance of the crop, and then obtains the growth information of the crop. The sensor should receive sunlight from the entire sky, including direct light and scattered light, in order to ensure the accuracy of monitoring. In the existing sensor, when sunlight enters the sensor, due to the different incident angles of different light rays, part of the light is absorbed by the side wall of the optical path or re-reflected into the sky, resulting in the loss of optical signals, which affects the accuracy of sensor monitoring, thereby affecting Reliability of crop growth information acquisition. In addition, when the sensor is working in the field, th...

Claims

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Application Information

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IPC IPC(8): G01N21/47G01N21/01
CPCG01N21/4738G01N21/01
Inventor 唐普传张文宇刘乃森曹静刘福霞张美娜吉书雯张伟欣朱星月吴茜李文清孙传亮郝天琪宣守丽周祖冲梁万杰曹宏鑫葛道阔李百明吴金恺
Owner JIANGSU ACADEMY OF AGRICULTURAL SCIENCES