Trunk freeze-thaw impedance image real-time detection method and system

Abstract

The invention discloses a trunk freeze-thaw impedance image real-time detection method and system, and the method comprises the steps: constructing a multi-frequency sweep frequency method based on the impedance characteristics of a trunk, manufacturing a measurement probe comprising a plurality of conical stainless steel electrodes, and building a two-end hybrid drive excitation method based on the measurement probe, and used for acquiring trunk cross section freeze-thaw impedance characteristic information data; performing regularization processing and two-dimensional image reconstruction and correction to obtain a trunk freeze-thaw impedance two-dimensional image; performing correction to obtain a trunk freeze-thaw impedance diagram; and establishing a trunk freeze-thaw information real-time sensing model based on the freeze-thaw impedance image, and calculating the real-time freeze-thaw degree and freeze-thaw depth of the trunk in the wintering period. The system comprises a trunk cross section freeze-thaw impedance acquisition unit, a trunk freeze-thaw impedance two-dimensional image reconstruction unit, a temperature compensation unit and a trunk freeze-thaw information real-time sensing unit. According to the invention, the freeze-thaw condition of the tree can be more accurately and rapidly measured in real time, and the freeze-thaw change of the tree trunk on the time scale is obtained.

Description

technical field [0001] The invention relates to the technical field of tree freeze-thaw detection, in particular to a method and system for real-time detection of tree trunk freeze-thaw impedance images. Background technique [0002] During the overwintering period of plants, the temperature will fluctuate around the plant freeze-thaw point. When the temperature is continuously lower than the freeze-thaw point, the liquid water in the plant tissue will freeze to form solid ice crystals. When the temperature continues to be higher than the freeze-thaw point, the plants will The solid ice crystals in the tissue melt and turn into liquid water. The freezing and thawing of plants will cause injury or even death to the whole body tissues or organs of trees, and at the same time have an important impact on the growth of plants after the wintering period. The freeze-thaw response in plants under low temperature stress reflects the cold resistance of trees. According to the freeze-t...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the shortcomings of inconvenient measurement, time-consuming, labor-intensive and high cost in the existing plant freeze-thaw measurement technology, the present invention proposes a real-time detection method and detection system of tree trunk freeze-thaw impedance images, which can more accurately and quickly measure trees in real time after experiencing severe winter Freezing and thawing of tree trunks at different times, and the changes of tree trunk freezing and thawing on the time scale

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