Stress wave nondestructive detection device for ancient tree/ancient building timber structure inner decay

Abstract

A stress wave nondestructive detection device for ancient tree / ancient building timber structure inner decay comprises a plurality of sensors, a sensor fixing device, a force hammer, a microdestructive needle-type connector, a data process system, and a timber inner decay tomographic software; the sensors and the data process system are connected with a computer installed with the tomographic software through a plurality of wires. The device has strong adaptability, and can perform 'completely nondestructive' detection of inner decay for ancient building timber structures which are not suitable for nailing at external surfaces through the special sensors and sensor fixing device; as for test objects such as ancient trees with bark, the device can penetrate the bark by using the microdestructive needle-type connector so as to assist detection. Based on stress wave signals collected during detection, an inner decay tomographic image of the detected object can be constructed, and thus quantitative determination of the inner decay shape and position of the detected object is realized.

Description

technical field [0001] The invention relates to the field of health evaluation of ancient trees and wooden structures of ancient buildings, in particular to a stress wave-based device capable of non-destructive detection and tomographic imaging of internal decay defects of ancient trees and wooden structures of ancient buildings. Background technique [0002] Ancient and famous trees are living cultural relics and the soul treasure of the country. They have both biological value and historical and cultural value of living cultural relics. According to the results of the National Survey of Ancient and Famous Trees released by the Office of the National Afforestation Committee in 2005, there are 2.853 million ancient and famous trees in the country, including 51,000 national first-class ancient trees, 1.043 million national second-class ancient trees, and national third-class ancient trees. There are 1.753 million national-level ancient trees and more than 5,700 national-level...

AI Technical Summary

Problems solved by technology

However, there is a common shortcoming in the equipment developed by them: a certain number of steel nails must be nailed on the outer surface of the measured object for suspending the sensor, which will undoubtedly cause damage to the measured object

Due to the important historical and cultural value of ancient wooden structures, it is undoubtedly inappropriate to use this kind of testing equipment that will cause new damage. Therefore, it is necessary to develop a non-destructive detection device that can adapt to the requirements of different test objects to evaluate ancient trees and wooden structures. Defects such as internal decay of structural ancient buildings, and then provide a scientific basis for their safety assessment

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