Temperature Effect on Impedance-based Damage Monitoring of Steel-Bolt Connection using Wireless Impedance Sensor Node

doi:2012.26.1.27

J. Ocean Eng. Technol. > Volume 26(1); 2012 > Article

J. Ocean Eng. Technol. 2012;26(1):27-33.
DOI: https://doi.org/10.5574/KSOE.2012.26.1.027

Hong Dong-Soo,Kim Jeong-Tae

Ocean Engineering Department Pukyong National University,Ocean Engineering Department Pukyong National University

무선 임피던스 센서노드를 이용한 강-볼트 접합부의 임피던스기반 손상모니터링에 미치는 온도 영향

홍동수,김정태

부경대학교 해양공학과,부경대학교 해양공학과

Keywords: Damage monitoring, Temperature effect, Lead zirconate titanate-impedance, Steel bolt connection, Correlation coefficient, Linear regression analysis

핵심용어: 손상모니터링, 온도영향, PZT-임피던스, 강볼트 접합부, 상관계수, 선형회귀분석

Abstract

This paper presents the effect of temperature on the impedance-based damage monitoring of steel-bolt connections using wireless impedance sensor nodes. In order to achieve the objective, the following approaches are implemented. First, a temperature-compensated damage monitoring scheme that includes a temperature compensation model and damage detection method is described. The temperature compensation model is designed by analyzing the linear regressions between the temperatures and impedance signatures. The correlation coefficient of the impedance signatures is selected as the damage index to monitor the damage occurrence in the target structures. Second, a wireless impedance sensor node is described for the design of the hardware components and embedded software. Finally, the performance of the temperature-compensated impedance-based damage monitoring scheme is evaluated for detecting a loose bolt in the steel-bolt connections on a lab-scale steel girder under various temperatures.