Embedded Active Sensors for In-Situ Structural Health Monitoring of Thin-Wall Structures
نویسندگان
چکیده
منابع مشابه
Embedded Active Sensors for In-Situ Structural Health Monitoring of Thin-Wall Structures
The use of embedded piezoelectric-wafer active-sensors for in-situ structural health monitoring of thin-wall structures is presented. Experiments performed on aircraft-grade metallic specimens of various complexities exemplified the detection procedures for nearfield and far-field damage. For near-field damage detection, the electro-mechanical (E/M) impedance method was used. Systematic experim...
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The capability of embedded piezoelectric wafer active sensors (PWAS) to perform in-situ ultrasonic nondestructive evaluation (NDE) is explored. Laboratory tests are used to prove that PWAS can satisfactorily perform Lamb wave transmission and reception. Subsequently, pulse-echo method for crack detection in an aircraft panel is illustrated. For large area scanning, a PWAS phased array is used t...
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Embedded-ultrasonics structural radar (EUSR) is a new concept and methodology for in situ nondestructive evaluation (NDE) and structural health monitoring (SHM) of thin-wall structures. EUSR consists of: (a) an array of piezoelectric wafer active sensors (PWAS) embedded into the structure; and (b) electronic modules for signal transmission/reception, processing, and interpretation. EUSR utilize...
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The aging of aerospace structures is a major current concern of civilian and military aircraft operators. Piezoelectric active sensors offer special opportunities for developing sensor arrays for in-situ health monitoring of aging aircraft fleet, because they are small, non-invasive, inexpensive and easily wired into sensor arrays. This paper presents work done on developing and utilizing piezo...
متن کاملLamb-wave Embedded Nde with Piezoelectric Wafer Active Sensors for Structural Health Monitoring of Thin-wall Structures
Piezoelectric wafer active sensors (PWAS) are inexpensive, non-intrusive, unobtrusive devices that can be surface-mounted on existing structures or inserted between the layers of new composite structures. The PWAS can be used in both active and passive modes. PWAS generate and detect Lamb waves and enable the development of embedded NDE concepts. This paper will present two embedded NDE concept...
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ژورنال
عنوان ژورنال: Journal of Pressure Vessel Technology
سال: 2002
ISSN: 0094-9930,1528-8978
DOI: 10.1115/1.1484117