Publication number: 20260328629
Abstract: Provided are a flexible sensing element for online monitoring of large strain based on piezoresistive effect, and a preparation method thereof. The sensing element includes a cover layer, a sensor unit, and a composite polymer substrate layer that are sequentially stacked from top to bottom. Electrodes are attached to two ends of the sensor unit and are connected to an external signal processing device by lead wires. The sensor unit is obtained from a conductive filler/polymer coacervate by vacuum hot pressing and sintering, has a thickness of 5 ?m to 1000 ?m, and includes the following components in parts by mass: 10 parts to 100 parts of polymer and 1 part to 3 parts of conductive filler. The cover layer includes a thermoplastic polymer. The sensing element is prepared using the vacuum hot pressing and sintering process, greatly enhancing conductivity and sensitivity of the sensor unit.
Type:
Application
Filed:
October 29, 2025
Publication date:
October 22, 2026
Applicants:
NATIONAL ENGINEERING RESEARCH CENTER OF HIGH-SPEED RAILWAY CONSTRUCTION TECHNOLOGY, CHINA RAILWAY GROUP LIMITED, CENTRAL SOUTH UNIVERSITY, CHINA RAILWAY TENTH BUREAU GROUP FIFTH ENGINEERING CO., LTD., CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY, CHINA CONSTRUCTION SECOND ENGINEERING BUREAU CO., LTD.
Inventors:
Peng LIU, Shuaifeng WANG, Zhiwu YU, Jun WU, Xiang CHENG, Lin CAO, Zhengtao CHEN, Qing LI, Ying CHEN, Xiaochun LIU, Rongzhen DONG, Lei CHEN, Niu ZHANG, Ziqing XU, Guangqiang SHAO, Wei QIU, Guoqing WANG