Light distribution measuring device and method for crop canopy

A crop canopy and measuring device technology, applied in measuring devices, photometry, optical radiation measurement, etc., can solve the problems of difficult adjustment of measuring positions, heavy point measuring instruments, and inability to attach, etc. Accurate, easy-to-adjust effects

Active Publication Date: 2012-09-19
BEIJING RES CENT FOR INFORMATION TECH & AGRI
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Problems solved by technology

[0005] However, the main defects of the above-mentioned light distribution measuring device are: the point measuring instrument is thick and heavy, and it is difficult to install it on the designated position of the plant leaves. Even if it is installed, it will cause the plant leaves to lose their natural shape and bring errors to the measurement; The disadvantage is that the measurement position is difficult to adjust, and the light intensity information at the specified position cannot be measured. SunS

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  • Light distribution measuring device and method for crop canopy
  • Light distribution measuring device and method for crop canopy
  • Light distribution measuring device and method for crop canopy

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[0039] Example

[0040] refer to figure 1 , in this embodiment, since the light sensor is to be placed on the surface of the plant leaf, it is also important to reduce the weight of the sensor while ensuring the measurement accuracy. It has high precision, but when measuring the light distribution in the field, it is easy to cause the light intensity to exceed the range. Therefore, a filter is added to the sensor. Because of the filter, it is necessary to measure the light intensity of different intensities The filter coefficient is determined to restore the collected signal to ensure that the system outputs the correct light intensity value. After measurement, the weight of a single sensor plus an optical filter is 11.90g.

[0041] Due to the limitation of data transmission, each line only allows 8 sensors, and each line is equipped with a notebook (receiving unit) to record data, and the sensors are connected by data lines with low quality, and the data lines are equipped ...

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Abstract

The invention discloses a light distribution measuring device and a method for crop canopy and relates to the technical field of light distribution measurement. The device comprises a bearing unit, a receiving unit and at least one light sensor, wherein the bearing unit comprises a supporting part and a bearing part which is the same as leaves of a to-be-measured plant in shape; the light sensors are arranged on the bearing part respectively and are connected in series sequentially; and one of the light sensors is connected with the receiving unit. According to the invention, the bearing par of the bearing unit, which is the same as the leaves of the to-be-measured plant in shape, is used for bearing the light sensor, so that the measuring position can be adjusted conveniently, the natural shape of the leaves of the plant is not damaged, and the precision of light distribution measuring is improved.

Description

technical field [0001] The invention relates to the technical field of light distribution measurement, in particular to a device and method for measuring light distribution in a crop canopy. Background technique [0002] The measurement of radiation distribution in plant canopy lays the foundation for the study of radiation transfer and distribution in canopy, and is the main method to verify the radiation model. [0003] In recent years, with the development of modern automatic detection technology, a variety of specialized instruments for observing light in the canopy of crops have emerged. Such as: LI-190SA point-type and LI-191SA line-type photosynthetically active radiation light quantum measuring instrument produced by LI-COR; SunScan canopy analyzer produced by Delta-T Instrument Company of the United Kingdom; AccuPAR canopy analysis of Decagon Instrument Company of the United States The main body of the instrument is 80 PAR probes evenly distributed on a 80cm probe ...

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Application Information

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IPC IPC(8): G01J1/00
Inventor 郭新宇温维亮王成王传宇高权
Owner BEIJING RES CENT FOR INFORMATION TECH & AGRI
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