Structural multiscale health monitoring device and structural multiscale health monitoring method on basis of novel integrated type composite sensor array

Abstract

The invention relates to a structure multiscale health monitoring device and a structural multiscale health monitoring method on the basis of a novel integrated type composite sensor array. The device comprises a computer, a broadband light source with a plurality of usable wavelengths, a multiscale demodulating device, a composite-material flexible plate and a novel integrated type composite sensor module, wherein the novel integrated type composite sensor is arranged on the composite-material flexible plate. The method applies the novel integrated type composite sensor, simultaneously measures the modal frequency of the structure and the strain distribution near the sensor and seeks a multiscale damage distribution form by population evolution and individual operation of selection, cross and variation and the like of a hierarchical genetic algorithm. The structural multiscale health monitoring device and the structural multiscale health monitoring method have the advantages of more sensing parameters, small volume of a sensing head and high system integration level and the like, and has the beneficial effects that the problems of data fusion and noise test and the like on the same structure can be effectively solved and health monitoring for the structure of the composite material from the whole and local scales can be realized.

Description

technical field [0001] The invention belongs to the technical field of structural health monitoring, and in particular relates to a structural multi-scale health monitoring device and method based on a novel integrated composite sensor array. Background technique [0002] Existing composite material structural health monitoring methods, such as local damage monitoring methods represented by Lamb wave detection, impedance technology, strain testing, etc., can carry out fine inspection of local initial defects and small damage of the structure, and help people judge whether corresponding measures should be taken. Maintenance measures to prevent further development of local damage and endanger the overall safety of the structure. However, Lamb wave detection and impedance technology have a limited detection area and low efficiency. At present, they are basically limited to damage location. There are still many problems to be solved in the research on damage degree evaluation; l...

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Problems solved by technology

However, under the current technical level, the overall damage monitoring is not sensitive to the initial small damage of the structure, and the small damage of the structure cannot be detected through the dynamic characteristic test of the whole structure.

In addition to the overall monitoring ability, the structural health monitoring system in the project should also have the ability to perform local fine non-destructive testing on the weak details that are prone to damage in the design and construction of complex engineering structures. It is difficult to solve the problem of damage monitoring with one technology

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