Laser heat pulse-based plant stem flow and transpiration water consumption detection device

Abstract

The invention discloses a laser heat pulse-based plant stem flow and transpiration water consumption detection device. A flowerpot of a plant to be detected is sealed and then placed on an electronic balance; the laser is converged to a heating point of the stem of the plant to be detected by irradiation of a diaphragm and two lenses; one infrared thermometer is arranged on the heating point, andthe other infrared thermometer is arranged on the upper side of the heating point; and a universal serial bus (USB) data acquisition card is connected with the two infrared thermometers, a high-powerlaser device and a personal computer (PC) respectively. The influence on the physiology of the plant is greatly reduced by adopting a noncontact laser heat pulse heat generator and the noncontact infrared thermometers, and the laser has better controllability on time and space, so the measured result can reflect the physiological feature of the plant; because the laser is coupled to the heating point by the adjustment of the lenses, the device is more convenient for installation and maintenance compared with optical fibers; and by adopting the electronic balance for displaying the transpiration water consumption of the plant in real time, a mathematical model between the plant stem flow rate and the transpiration water consumption is established more conveniently.

Description

technical field [0001] The invention relates to a plant stem flow and transpiration water consumption detection device, in particular to a plant stem flow and transpiration water consumption detection device based on laser thermal pulses. Background technique [0002] The growth of plants is inseparable from water. Water circulates in plants-atmosphere-soil. On the one hand, it ensures the life activities of plants and maintains the balance and development of ecology. On the other hand, it is also the result of life activities. [0003] my country is a large agricultural country with very scarce water resources, and agricultural water consumption accounts for 70% of the total water consumption. Therefore, under the premise of ensuring stable and high agricultural production, we should vigorously develop water-saving irrigation to achieve rational use of water resources, and change abundant water and high production into economical. High water yield is a very urgent and import...

AI Technical Summary

Problems solved by technology

Its disadvantages are: 1) it is necessary to punch holes in the stem of the plant so as to put the heat source and detection device; it changes the stem flow state of the plant itself; 2) it is easy to make the heater and the probe unable to Good alignment, thus affecting the measurement results; 3) The heating process may cause the xylem to lose activity, thus affecting the accuracy of the measurement results

Third: The existing products are mainly suitable for woody plants such as fruit forests. There is a problem of burning the stems of herbaceous plants. Due to the limitation of resolution, this problem cannot be solved by reducing the heating amount; in addition, imported products are expensive

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