Self-diagnosis and validation of active sensors used for structural health monitoring

Gyuhae Park; Charles R. Farrar; Francesco Lanza di Scalea; Stefano Coccia

doi:10.1117/12.658813

5 April 2006 Self-diagnosis and validation of active sensors used for structural health monitoring

Gyuhae Park, Charles R. Farrar, Francesco Lanza di Scalea, Stefano Coccia

Proceedings Volume 6173, Smart Structures and Materials 2006: Smart Structures and Integrated Systems; 61731N (2006) https://doi.org/10.1117/12.658813
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2006, San Diego, California, United States

Abstract

This paper presents a self-diagnostic and sensor validation procedure that performs in-situ monitoring of the operational status of piezoelectric (PZT) sensors and actuators used in structural health monitoring (SHM) applications. The sensor/actuator self-diagnostic procedure, where the sensors/actuators are confirmed to be functioning properly during operation, is a critical component to successfully complete the SHM process with large numbers of active sensors typically deployed in a structure. Both degradation of the mechanical/electrical properties of a PZT transducer and the bonding defects between a PZT patch and a host structure could be identified using the proposed procedure. First, the effects of bonding defects between a PZT patch and a host structure on high frequency SHM techniques, including Lamb wave propagations and impedance methods, have been experimentally investigated. It has been found that the effects are remarkable, modifying wave phase and amplitude, creating new wave modes, and changing measured impedance spectrum. These changes can lead to the false indications on structural conditions without an efficient sensor-diagnostic procedure. The feasibility of the proposed sensor diagnostics procedure was then demonstrated by analytical studies and experimental examples, where the functionality of surface-mounted piezoelectric sensors was continuously deteriorated. The proposed procedure can provide a metric that can be used to determine the sensor functionality over a long period of service time or after an extreme loading event. Further, the proposed procedure can be useful if one needs to check the operational status of a sensing network right after its installation.

Citation Download Citation

Gyuhae Park, Charles R. Farrar, Francesco Lanza di Scalea, and Stefano Coccia "Self-diagnosis and validation of active sensors used for structural health monitoring", Proc. SPIE 6173, Smart Structures and Materials 2006: Smart Structures and Integrated Systems, 61731N (5 April 2006); https://doi.org/10.1117/12.658813

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available