Intelligent variable-frequency excitation impact hammer and structural damage detection method and application thereof

Abstract

The invention discloses an intelligent variable-frequency excitation impact hammer. The impact hammer comprises a hammer head, a motor, a mechanical arm, a voiceprint frequency discrimination module, an audio quality recognition module, an impact frequency modulation module and a sound collection module, wherein the hammerhead and the motor are arranged at a top end of the mechanical arm, the sound sensor is arranged above the hammer head, the voiceprint frequency discrimination module and the sound collection module are arranged in the middle of the hammer head, and the frequency modulation circuit and the audio quality recognition module are arranged at a tail of the hammer head. The impact hammer has the characteristic of automatically adjusting the excitation frequency and the excitation angle, and automatic variable-frequency excitation is carried out according to a typical damage database under the condition of no human intervention, so an optimal detection result is obtained.

Description

technical field [0001] The invention relates to the technical field of automatic percussion detection, in particular to an intelligent frequency conversion excitation impact hammer and its structural damage detection method and application. Background technique [0002] In the structural inspection project, engineers often judge the location and degree of internal damage that cannot be directly observed by the appearance, so as to provide a basis for formulating a structural reinforcement plan. However, the current tapping detection method mainly relies on the experience of professional testing personnel to judge, which has caused the problems of single detection object, human subjective judgment error, insufficient continuous detection ability, qualitative analysis and insufficient analogy of multiple indicators. In practical engineering applications, although the automatic percussion device can be used to identify the sound induced by internal damage, due to equipment cond...

AI Technical Summary

Problems solved by technology

However, the current tapping detection method mainly relies on the experience of professional testing personnel to judge, resulting in the problems of single detection object, human subjective judgment error, insufficient continuous detection ability, qualitative analysis and insufficient analogy of multiple indicators

In practical engineering applications, although the automatic percussion device can be used to identify the sound excited by internal damage, due to equipment conditions, it is generally only possible to check a single percussion frequency or a pre-set frequency conversion process.

Due to the lack of real-time performance, it is difficult to provide effective detection information for small damage or local damage that is not obvious

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