A Self-contained Active Sensor System for Health Monitoring of Civil Infrastructures

A self-contained active sensor system is proposed for the practical use of an electro-mechanical impedance-based structural health monitoring (SHM) technique for civil infrastructures. This system, which consists of a miniaturized impedance measuring chip (AD5933) and a self-sensing macro-fiber composite (MFC) patch, can be a powerful tool for a variety of in-situ SHM applications in civil, mechanical, and aerospace systems, since (1) the AD5933 is low-cost, portable, and readily combined with a wireless telemetry and (2) the MFC patch can be permanently attached to a structure and provide meaningful information regarding the structure's integrity through its self-sensing function. In this study, the effectiveness of the proposed active sensor device has been verified through a series of experimental studies: (a) inspecting loosening bolts in a bolt-jointed structure and (b) detecting corrosion in an aluminum beam.

[1]  Daniel J. Inman,et al.  IMPEDANCE-BASED HEALTH MONITORING OF CIVIL STRUCTURAL COMPONENTS , 2000 .

[2]  Daniel J. Inman,et al.  An outlier analysis of MFC-based impedance sensing data for wireless structural health monitoring of railroad tracks , 2008 .

[3]  Charles R. Farrar,et al.  A miniaturized electromechanical impedance-based node for the wireless interrogation of structural health , 2006, SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring.

[4]  Daniel J. Inman,et al.  Impedance‐Based Structural Health Monitoring , 2005 .

[5]  Victor Giurgiutiu,et al.  Title: Electro-Mechanical Impedance Method for Crack Detection in Thin Wall Structures. , 2001 .

[6]  Chung Bang Yun,et al.  Multiple Crack Detection of Concrete Structures Using Impedance-based Structural Health Monitoring Techniques , 2006 .

[7]  Daniel J. Inman,et al.  Towards autonomous sensing , 2006, SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring.

[8]  Chee Kiong Soh,et al.  Health Monitoring Of Civil Infrastructure Using Smart PiezoelectricTransducer Patches , 2000 .

[9]  Hoon Sohn,et al.  Overview of Piezoelectric Impedance-Based Health Monitoring and Path Forward , 2003 .

[10]  W. Keats Wilkie,et al.  An overview of composite actuators with piezoceramic fibers , 2002 .

[11]  Paul H. Mirick,et al.  Low-cost piezocomposite actuator for structural control applications , 2000, Smart Structures.

[12]  C. Yun,et al.  Health monitoring of steel structures using impedance of thickness modes at PZT patches , 2005 .