Electromechanical Impedance - Based Structural Health Monitoring Instrumentation System Applied to Aircraft Structures and Employing a Multiplexed Sensor Array

• DOI: 10.5028/jatm.v7i3.447
• Publication Date: 2015-09-10T15:10:25Z
• Authors: Isabela Iuriko Ca...; Guilherme De Fari...; Valder Steffen Ju...; Roberto Mendes Fi...
• Keywords: Structural Health Monitoring; Instrumentation

The electromechanical impedance method has been seen as a promising tool for structural health monitoring regarding different types of structures and purposes. Most importantly, this can be used in real-time applications. Frequently, massive, high-cost, single-channel analyzers are to process the time domain data, aiming at obtaining complex, frequency-dependent functions therefore infer about presence, position extent an existing damage. However, large structures, it is desirable deploy array piezoelectric transducers over area monitored interrogate these successively, order increase probability successful detection damage early phase. literature describes many miniaturized systems that monitor however, presenting serious restrictions on data acquisition capabilities. This paper presents hardware not limited any restriction, exhibiting innovative way measure multiplexed bonded transducers. Each logical block proposed architecture presented detail. system only avoids costly fast Fourier transform analyzers/ algorithms, but also evades high-speed hardware. A prototype using inexpensive integrated circuits digital signal processor was built tested two structures: aluminum beam aircraft panel. Simulated damages were introduced each structure, performance tested. actual uses universal serial bus connection communicate with personal computer.