An efficient signal processing tool for impedance-based structural health monitoring

Various experimental studies have demonstrated that an impedance-based approach to structural health monitoring can be an effective means of damage detection. Using the self-sensing and active-sensing capabilities of piezoelectric materials, the electromechanical impedance response can be monitored to provide a qualitative indication of the overall health of a structure. Although impedance analyzers are commonly used to collect such data, they are bulky and impractical for long-term field implementation, so a smaller and more portable device is desired. However, impedance measurements often contain a sizeable number of data points, and a smaller device may not possess enough memory to store the required information, particularly for real-time analysis. Therefore, the amount of data used to assess the integrity of a structure must be significantly reduced. A new type of cross correlation analysis, for which impedance data is instantaneously correlated between different sensor sets and different frequency ranges, as opposed to be correlated to pre-stored baseline data, is proposed to drastically reduce the amount of data to a single correlation coefficient and provide a quantitative means of detecting damage relative to the sensor positions. The proposed analysis is carried out on a 3-story representative structure and its efficiency is demonstrated.

[1]  Victor Giurgiutiu,et al.  Piezoelectric Wafer Embedded Active Sensors for Aging Aircraft Structural Health Monitoring , 2002 .

[2]  Victor Giurgiutiu,et al.  Electro-Mechanical Impedance Method for Crack Detection in Thin Plates , 2001 .

[3]  Daniel J. Inman,et al.  Structural health monitoring using electro-mechanical impedance sensors , 2008 .

[4]  Victor Giurgiutiu,et al.  Experimental Investigation of E/M Impedance Health Monitoring for Spot-Welded Structural Joints , 1999 .

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

[6]  Charles R. Farrar,et al.  Development of an extremely compact impedance-based wireless sensing device , 2008 .

[7]  Daniel J. Inman,et al.  An Integrated Health Monitoring Technique Using Structural Impedance Sensors , 2000 .

[8]  Charles R. Farrar,et al.  Performance assessment and validation of piezoelectric active-sensors in structural health monitoring , 2006 .

[9]  Craig A. Rogers,et al.  Local-area health monitoring of aircraft via piezoelectric actuator/sensor patches , 1995, Smart Structures.

[10]  Daniel J. Inman,et al.  Electro-Mechanical Impedance-Based Wireless Structural Health Monitoring Using PCA-Data Compression and k-means Clustering Algorithms , 2008 .

[11]  Victor Giurgiutiu,et al.  Embedded Self-Sensing Piezoelectric Active Sensors for On-Line Structural Identification , 2002 .

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

[13]  Daniel J. Inman,et al.  Impedance-Based Structural Health Monitoring with Artificial Neural Networks , 2000 .

[14]  Charles R. Farrar,et al.  Piezoelectric Active Sensor Self-Diagnostics Using Electrical Admittance Measurements , 2006 .

[15]  Suresh Bhalla,et al.  Structural impedance based damage diagnosis by piezo‐transducers , 2003 .

[16]  Suresh Bhalla,et al.  High frequency piezoelectric signatures for diagnosis of seismic/blast induced structural damages , 2004 .

[17]  Victor Giurgiutiu,et al.  Characterization of Piezoelectric Wafer Active Sensors , 2000 .

[18]  Craig A. Rogers,et al.  Coupled Electro-Mechanical Analysis of Adaptive Material Systems — Determination of the Actuator Power Consumption and System Energy Transfer , 1994 .

[19]  Charles R. Farrar,et al.  Sensor Self-diagnosis Using a Modified Impedance Model for Active Sensing-based Structural Health Monitoring , 2009 .

[20]  Suresh Bhalla,et al.  Structural Health Monitoring by Piezo-Impedance Transducers. I: Modeling , 2004 .

[21]  Chee Kiong Soh,et al.  Electromechanical Impedance Modeling for Adhesively Bonded Piezo-Transducers , 2004 .

[22]  Daniel J. Inman,et al.  Feasibility of using impedance‐based damage assessment for pipeline structures , 2001 .

[23]  Charles R. Farrar,et al.  An Outlier Analysis Framework for Impedance-based Structural Health Monitoring , 2005 .

[24]  Chung Bang Yun,et al.  PZT-based active damage detection techniques for steel bridge components , 2006 .

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

[26]  Suresh Bhalla,et al.  Performance of smart piezoceramic patches in health monitoring of a RC bridge , 2000 .

[27]  Victor Giurgiutiu,et al.  Active sensors for health monitoring of aging aerospace structures , 2000, Smart Structures.

[28]  C. Liang,et al.  Truss Structure Integrity Identification Using PZT Sensor-Actuator , 1995 .

[29]  Craig A. Rogers,et al.  MONITORING THE INTEGRITY OF COMPOSITE PATCH STRUCTURAL REPAIR VIA PIEZOELECTRIC ACTUATORS/SENSORS , 1995 .

[30]  Daniel J. Inman,et al.  Improving Accessibility of the Impedance-Based Structural Health Monitoring Method , 2004 .