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Crop water deficiency detection device based on thermocouple monitoring of leaf temperature increase and detection method

A detection device, thermocouple technology, applied in the direction of measuring devices, electric devices, thermometers using electric/magnetic elements that are directly sensitive to heat, etc., can solve the problem of inconvenient application, expensive infrared thermometer or infrared temperature sensor, etc. problem, to achieve the effect of high precision, easy data collection and storage, and low price

Active Publication Date: 2016-01-27
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Infrared thermometers or infrared temperature sensors are expensive, limited to scientific research, and inconvenient to use in guiding agricultural production

Method used

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  • Crop water deficiency detection device based on thermocouple monitoring of leaf temperature increase and detection method
  • Crop water deficiency detection device based on thermocouple monitoring of leaf temperature increase and detection method
  • Crop water deficiency detection device based on thermocouple monitoring of leaf temperature increase and detection method

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Embodiment 1

[0034] Such as figure 1 with figure 2 As shown, the crop water deficit detection device based on thermocouple monitoring leaf temperature rise of the present embodiment includes thermocouple and sufficient transpiration 2, the cold end 1b of thermocouple is placed on the surface layer of sufficient transpiration 2, and the hot end of thermocouple 1a is attached to the leaf surface of the measured crop, and the hot end 1a and cold end 1b of the thermocouple generate thermal electromotive force and are connected to the AD digital-to-analog converter 5, and the other end of the AD digital-to-analog converter 5 is connected to the signal amplifier 6, and the signal amplifier The other end of 6 is connected to computer 9 through data collector 8.

[0035] The above-mentioned sufficient transpiration 2 comprises an open water storage device 21, an appropriate amount of water is stored in the water storage device 21, and the foamed polystyrene board 22 that floats on the water surf...

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Abstract

The present invention discloses a crop water deficiency detection device based on thermocouple monitoring of leaf temperature increase and a detection method, the crop water deficiency detection device comprises a full transpiration matter, a thermocouple and a micro voltage measurement instrument, a thermocouple cold end is placed in the surface layer of the full transpiration matter, a thermocouple hot end is affixed to to-be-tested crop leaf surface, and after production of thermoelectromotive forces, the thermocouple hot end and the thermocouple cold end both are communicated with the micro voltage measurement instrument. The crop water deficiency detection device overcomes the defect of need of simultaneous determination of leaf temperature and air (or full transpiration matter surface) of the temperature difference in the prior art, can directly determine the temperature increase value of the leaf respect to the full transpiration matter surface, has high in thermocouple precision, relatively low price, and easy data acquisition and storage, and can meet requirements on sensors of field-crop water deficiency detection.

Description

technical field [0001] The invention relates to agricultural irrigation monitoring technology, in particular to a crop water deficit detection device and a detection method based on thermocouple monitoring of leaf temperature rise. Background technique [0002] The important significance of water consumption by transpiration of crop plants is to cool down the plants. When the crops are short of water, transpiration is inhibited, and the energy consumed by transpiration is reduced. Under certain radiation conditions, the sensible heat flux increases, and the temperature of the crop itself and the canopy increases. , and the temperature increase of crops can reflect the joint effect of soil drought and atmospheric overdrying, which is better than traditional soil moisture indicators in reflecting crop water deficit. [0003] Therefore, the research on crop water deficit detection technology based on the temperature difference between the leaf or canopy and the atmosphere has b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N25/56G01K7/04
Inventor 徐俊增廖林仙卫琦吕玉平杨士红
Owner HOHAI UNIV
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