Wireless plant stem flow detection device based on laser heat pulse

Abstract

The invention discloses a wireless plant stem flow detection device based on a laser heat pulse. The wireless plant stem flow detection device comprises a microprocessor, a laser heat pulse generator, a stem flow sensor, a calendar chip, a voltage converter, a power supply, a wireless communication module, a keyboard, an LCD module, an RS232 interface and a USB interface module. The laser heat pulse is taken as the heat pulse of the stem flow sensor, and temperature is detected by an infrared temperature probe, the contact of the detected stem with the detection device is avoided by the heat source and the detection method, thus reducing the impact on the stem. Two infrared temperature probes are respectively arranged at the upper side and the lower side of an optical fiber, are inserted into foam enwinding the plant stem to be detected and do not contact the stem; the two infrared temperature probes are respectively connected with the microprocessor, and the optical fiber is connected with the laser heat pulse generator. A wireless data communication method of ZigBee communication protocol is employed to facilitate the device installation and the data acquisition. The wireless plant stem flow detection device can be used for measuring the stem flow of herbaceous plants or smaller stems.

Description

technical field [0001] The invention relates to a wireless plant stem flow 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 important task. [0004] For a long time, people have used the soil water content or the relative humidity of the atmosph...

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

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 amount of heating; in addition, because the heating element and the temperature measuring node are inserted into the plant stems, it will cause damage to the tiny stems. Causes tiny stalk damage to plants; imported products are expensive

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