PRINTED STRAIN SENSOR ARRAY FOR LONG-TERM STATIC STRAIN MEASUREMENTS IN CIVIL STRUCTURES

摘要

This paper demonstrates an array of 25 printed strain sensors for applications to Structural Health Monitoring. The sensors were incorporated into a flexible substrate with a double-sided copper wiring system. The sensors have a gauge factor of 3.27 and owing to the full Wheatstone bridge configuration are effective in compensating for temperature variations. The developed sensor array was equipped with a wireless data acquisition system that provides automated and remote measurements and was deployed on a dam. The collected results revealed that sensors in the array demonstrate proper operation in terms of crack detection and therefore the potential for practical application in SHM.