Passive percussive material damage detecting device and method thereof

Abstract

The invention provides a passive percussive material damage detecting device and a method thereof. The material damage detecting device includes at least one wheel body, a hard knocking tooth is disposed on an outer circumferential surface of the wheel body, and the knocking tooth is configured to perform knocking on a structural surface of a material to be inspected with the rotation of the wheelbody; a sensor is configured to sense a response signal transmitted to the sensor by a region where the surface of the structure is knocked; and a processor is configured to determine an area in which structural damage exists based on a signal sensed by the sensor. The material damage detecting device can stably knock the structural surface of the detecting material while simplifying the overallstructure of the detecting device by the knocking teeth provided on the wheel body, and the damage position in the material to be inspected is accurately determined according to the detected signal.

Description

technical field [0001] The invention relates to the detection of structural damage, in particular to a passive percussion type material damage detection device and method. Background technique [0002] With the continuous advancement of science and technology and the continuous improvement of transportation needs, the number of various roads, bridges and other engineering structures is also increasing. However, due to different degrees of damage, such as cracks, pits, debonding and aging phenomena, which may be caused by process reasons, use loads or other environmental factors during its manufacture and use, these damages have accumulated to a certain extent It will affect the normal use of the structure and seriously threaten people's life safety and property safety. [0003] Therefore, in order to ensure the normal operation of the engineering structure, damage detection is required before delivery or after a period of service. For example, before the bridge is opened t...

AI Technical Summary

Problems solved by technology

[0004] At present, there are many damage detection methods for engineering structures and materials, such as local detection methods for damage detection by means of X-rays, infrared rays, ultrasonic waves, radar and magnetic eddy currents. The accuracy of damage detection is high, but the dead angle cannot be detected or the time required for detection is too long

However, for the overall detection technology that deploys sensors on the engineering structure to measure the static displacement, velocity, acceleration and other responses of the engineering structure under external excitation, and inverts the damage in the engineering structure, only the working environment of the engineering structure can be used. The structural response excited by the excitation is used for damage inversion. If the external excitation is not applied properly, the response of the engineering structure may not fully reflect the damage, thus affecting the detection accuracy.

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