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Nondestructive detection system for internal abnormality of woody body based on radar wave

A non-destructive detection and radar wave technology, which is applied in radio wave measurement systems, wood testing, radio wave reflection/reradiation, etc., can solve the problems of low recognition accuracy, tree layer recognition, and difficult interpretation, etc., to achieve a solution Strong translatability, high accuracy, and the effect of improving detection accuracy

Inactive Publication Date: 2017-02-15
BEIJING FORESTRY UNIVERSITY
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Problems solved by technology

However, these studies have the problems of difficult interpretation, low identification accuracy, and inability to perform hierarchical identification of abnormalities in trees.

Method used

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  • Nondestructive detection system for internal abnormality of woody body based on radar wave
  • Nondestructive detection system for internal abnormality of woody body based on radar wave
  • Nondestructive detection system for internal abnormality of woody body based on radar wave

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Embodiment Construction

[0040] The present invention will be further described below in conjunction with the accompanying drawings.

[0041] The present invention proposes a radar wave-based method for identifying internal abnormalities in woody bodies, referring to the process figure 1 , including the following steps:

[0042] combined with figure 2Radar wave data collection will be described. When the radar wave transceiver is a medium-coupled ground-penetrating radar, it needs to be scanned at a set height close to the bark. First, control the movable detection platform close to the measured object through the computer or the handle, select a point, make the plane of the radar wave transceiver perpendicular to the tangent of a certain circumferential position, control and adjust the locking device so that the plane of the radar wave transceiver is close to the bark surface . After the scan starts, the movable detection platform will move along the circle of the tree, emitting a radar detectio...

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Abstract

The invention discloses a nondestructive detection system for positioning and imaging internal abnormality (such as decay, holes, scars, cracks and the like) of a woody body based on radar wave. The system comprises a radar detection movement platform, a three-dimensional laser scanner, a data processing system and imaging software. The system principle is characterized in that reflection characteristics of an abnormal layer are obtained by utilization of methods, such as threshold value, matched filter, Hilbert integral and the like according to transmission characteristics, such as spreading amplitude, wave speed change, reflection, and transmission, of the radar wave in the woody body and abnormal media and according to distribution characteristics of electrical properties and physical properties on the basis of images acquired through scanning by medium-coupled radar wave, and a contour of a tree is obtained by utilization of the three-dimensional laser scanner, therefore the decay in the tree is accurately positioned and imaged.

Description

technical field [0001] The invention belongs to the field of non-destructive detection inside the woody body, and in particular relates to a radar wave-based system capable of nondestructively detecting, positioning and identifying the internal structure and abnormal conditions of the woody body, and realizing cross-sectional imaging. Background technique [0002] For the trees growing in the natural environment, especially the precious tree species, as well as the wooden beams and columns of ancient buildings, there are sometimes hollow, decayed, insect-eaten and other phenomena. Generally, defects occur in the wood, which are difficult to detect and may cause irreparable damage in the long run. Therefore, it is particularly important to implement fast and accurate non-destructive testing methods in the maintenance measures of trees and ancient buildings. The methods currently used in the field of non-destructive detection of wood mainly include impedance analyzers, ultraso...

Claims

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Application Information

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IPC IPC(8): G01N33/46G01S13/89
CPCG01N33/46G01S13/89
Inventor 文剑肖夏阳李伟林肖中亮高林
Owner BEIJING FORESTRY UNIVERSITY
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