Equivalent collision rigidity ejector for near-wall damage detection

Abstract

The invention relates to an equivalent collision rigidity ejector for near-wall damage detection. The ejector mainly comprises a hammer head (1), a shell (2), a force sensor (3), a transmission hammerseat (4), an acceleration sensor (5), a transmission hammer seat left deflector rod (6), a transmission hammer seat middle through hole (7), a transmission hammer seat right deflector rod (8), a shell deflector rod slideway (9), a shell center upper circular baffle (10), a transmission hammer seat upper pressing disc (11), a spring (12), a shell center lower circular baffle (13), a transmission hammer base lower pressing disc (14), an electric suction disc (15), a shell bottom through hole (16) and other detail structures. The ejector can be applied to the field of civil engineering health detection including concrete material strength detection, near-wall void damage detection based on equivalent collision rigidity and the like, and detection damage types include void detection of concrete in the concrete filled steel tube and the wall of the steel tube, void detection of composite materials, detection of concrete structure near-wall holes, concrete crack detection and the like.

Description

technical field [0001] The invention relates to an equivalent impact stiffness catapult for near-wall damage detection. Fields of application include: civil engineering and structural health testing. Specifically, it includes concrete material strength detection, near-wall void damage detection based on equivalent collision stiffness, etc. The detection damage types include void detection between concrete and steel pipe walls inside concrete-filled steel pipe concrete, composite material void detection, concrete structure near-wall hole detection, concrete crack detection etc. Background technique [0002] Modern structures tend to be complex, and various materials are used in combination. The material and the material are directly prone to void and damage at the interface. However, since the connection interface is located inside the structure in many cases, it cannot be directly detected. Therefore, the research on damage monitoring of the connection surface has attract...

AI Technical Summary

Problems solved by technology

[0007] Among the above methods, the ultrasonic method needs to paste the probe on the surface of the structure, and the reflected echo reception signal is greatly affected by the pasted surface

The infrared method is limited by the ambient temperature and cannot reflect the damage of the structure well, let alone measure the impact stiffness of the structure

The method based on the percussion sound signal is greatly affected by the environment, and the environmental noise level directly affects the detection effect

[0008] Therefore, for many detection methods, it cannot be widely used due to the constraints of various detection conditions.

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