Structural damage monitoring system and monitoring method thereof

Abstract

The invention belongs to the technical field of structural health monitoring and relates to a structural damage monitoring system and a monitoring method thereof. The structural damage monitoring system of the invention mainly comprises a power supply system, a controller, a power amplifier, a signal generator, a data acquisition plate, an I / O control panel, a charge amplifier, a multichannel switching apparatus, a 24-channel sensor array and a computer man-machine interface. Based on active Lamb wave, the structural damage monitoring method of the invention employs a mode of foreground real-time data acquisition and background instant imaging processing and data management, so as to enhance real-time performance and reliability. Secondly, the technical implementation method realizes single point excitation in terms of hardware through connection of three charge amplifiers and three channels on the data acquisition plate; a data reception mode of simultaneous information reception of three points can carry out multiple point information reception without excitation and increase working efficiency effectively. Besides, the invention employs a multichannel switching apparatus to solve a problem of mutual interferences among sensor channels.

Description

technical field [0001] The invention belongs to the technical field of structural health monitoring, and relates to a piezoelectric structure damage monitoring system and a monitoring method thereof. Background technique [0002] With the development of science and technology, various new and complex structures have emerged one after another, making damage diagnosis and monitoring more urgent and important. Once the important parts in some structures are damaged, the degree of damage will expand very rapidly, if not found in time, it will soon lead to the destruction of the entire structure. In addition, due to the high maintenance cost required by the aging fatigue and corrosion of the structure, it is particularly important to find the damage in time and carry out maintenance at any time to save various costs. The damage diagnosis, evaluation and reinforcement technology of engineering structures has become very active in the field of structural engineering research, and ...

AI Technical Summary

Problems solved by technology

[0003] Existing piezoelectric damage monitoring equipment is mostly single-excitation and single-receiving equipment, with slow scanning speed and low efficiency; signal filtering mostly uses post-processing and digital filtering technology

The existing technology mostly adopts a stand-alone mode, which is not conducive to hardware and channel expansion, and the existing technology mostly uses the Windows operating system, and does not introduce a real-time (RT) system, so real-time monitoring cannot be realized

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