منابع مشابه
Guided Wave Piezoelectric Wafer Active Sensor Arrays For Damage Detection
The paper describes an in-situ method for damage detection using phased arrays of piezoelectric wafers active sensors (PWAS) that are permanently attached to the structure. The method uses scanning beams of guided waves that can travel at large distances with little energy loss and hence permit the interrogation of large structural areas from a single location. The novelty of the present method...
متن کاملDamage Detection Using Guided Waves and Piezoelectric Wafer Active Sensor Arrays
This paper presents our research work on using the guided waves for damage detection generated by piezoelectric wafer active sensors (PWAS) arrays that are permanently attached to the structure. The data collection and processing is performed using the embedded ultrasonics structural radar (EUSR) concept. Research objectives includes: (a) improving damage detection in the array near field; (b) ...
متن کاملOPTIMAL SENSOR PLACEMENT FOR DAMAGE DETECTION BASED ON A NEW GEOMETRICAL VIEWPOINT
In this study, efficient methods for optimal sensor placement (OSP) based on a new geometrical viewpoint for damage detection in structures is presented. The purpose is to minimize the effects of noise on the damage detection process. In the geometrical viewpoint, a sensor location is equivalent to projecting the elliptical noise on to a face of response space which is corresponding to the sens...
متن کاملIn situ 2-D piezoelectric wafer active sensors arrays for guided wave damage detection.
This paper presented development work of an in situ method for damage detection in thin-wall structures using embedded two-dimensional ultrasonic phased arrays. Piezoelectric wafer active sensors were used to generate and receive guided Lamb waves propagating in the plate-like structure. The development of a generic beamforming algorithm that does not require parallel ray assumption through usi...
متن کاملFerroelectric Thin-Film Active Sensor Arrays for Structural Health Monitoring
Structural health monitoring (SHM) is an emerging field in which smart materials interrogate structural components to predict failure, expedite needed repairs, and thus increase the useful life of those components. Piezoelectric wafer active sensors (PWAS) have been previously adhesively-bonded to structures and demonstrate the ability to detect and locate cracking, corrosion, and disbonding th...
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ژورنال
عنوان ژورنال: Applied Mechanics and Materials
سال: 2010
ISSN: 1662-7482
DOI: 10.4028/www.scientific.net/amm.24-25.51