Structural health monitoring system based on shape memory polymer

Abstract

The invention belongs to the technical field of structural health monitoring and particularly relates to a structural health monitoring system based on a shape memory polymer. The structural health monitoring system based on the shape memory polymer comprises a sensor and a processor, the system comprises a plurality of shape memory polymer buckling beam rod assemblies and a signal processing andstructure health state abnormity alarm platform. The shape memory polymer buckling beam rod part assembly comprises an outer frame constraint, a shape memory polymer rod part and an electric signal generation element, the electric signal generation element comprises a piezoelectric material layer, and the signal processing and structure health state abnormity alarm platform is electrically connected with the piezoelectric material layer. The shape memory polymer structure health detection system does not need to be driven by an external power supply, is high in device stability and reliability, and has very good editability; targeted design adjustment can be carried out based on requirements of different projects and structures, temperature change response of a shape memory material is used as an implementation method of structural health temperature monitoring, a specific rod set structure is combined, and the industrial problems of high reliability, durability requirements and the like of structural health monitoring can be solved.

Description

technical field [0001] The invention belongs to the technical field of structural health monitoring, and in particular relates to a structural health monitoring system based on shape memory polymers. Background technique [0002] In engineering practice, structures often bear a variety of coupled loads under extreme working conditions, and functional failure and damage occur from time to time. Therefore, the analysis and monitoring of the health status of structures is of great significance to ensure their normal service. Especially when the external environment changes (such as ambient temperature change), the structure usually suffers local or overall deformation, which has an unpredictable impact on its safety. Since temperature strain has a significant impact on structural safety and durability, temperature health monitoring of structures has become an important link that cannot be ignored in the field of structural health monitoring. The existing temperature health mon...

AI Technical Summary

Problems solved by technology

The existing temperature health monitoring technology usually uses the material characteristics of the temperature sensor crystal oscillator frequency to change with temperature to realize its function, but it needs a continuous supply of external power supply, and the anti-interference and durability of the device have large deficiencies, which cannot be satisfied for a long time. Health Monitoring Requirements for High Safety and Reliability Structures

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