US 12,247,887 B2
Structural health monitoring system based on shape memory polymer
Pengcheng Jiao, Zhejiang (CN); Xiaoxiao Cui, Zhejiang (CN); and Tao Chen, Zhejiang (CN)
Assigned to ZHEJIANG UNIVERSITY, Zhejiang (CN)
Appl. No. 17/611,572
Filed by ZHEJIANG UNIVERSITY, Zhejiang (CN)
PCT Filed Apr. 25, 2021, PCT No. PCT/CN2021/089507
§ 371(c)(1), (2) Date Nov. 16, 2021,
PCT Pub. No. WO2021/227841, PCT Pub. Date Nov. 18, 2021.
Claims priority of application No. 202010393267.7 (CN), filed on May 11, 2020.
Prior Publication US 2022/0307911 A1, Sep. 29, 2022
Int. Cl. G01K 5/48 (2006.01); G01B 7/16 (2006.01)
CPC G01K 5/483 (2013.01) [G01B 7/16 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A structural health monitoring system based on a shape memory polymer, the structural health monitoring system comprising a plurality of shape memory polymer buckling beam rod components and a signal processing and structural health state abnormity warning platform; wherein each shape memory polymer buckling beam rod component comprises an outer frame constraint, a shape memory polymer rod arranged in the outer frame constraint, and an electric signal generating element arranged on the shape memory polymer rod; the electric signal generating element comprises piezoelectric material layers covering surfaces of the shape memory polymer rod, and the signal processing and structural health state abnormity warning platform is electrically connected to the piezoelectric material layers,
wherein the shape memory polymer rod is able to generate a respective deformation along with temperature change,
the shape memory polymer rod is able to generate buckling by an axial pressure under an action of the outer frame constraint after temperature deformation, and becomes a shape memory polymer buckling beam,
the shape memory polymer buckling beam is able to generate post-buckling along with continuous change of a temperature, and becomes a shape memory polymer post-buckling beam.