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Proceedings Paper

Mimicking the biological neural system using electronic logic circuits
Author(s): Goutham R. Kirikera; Vishal Shinde; Inpil Kang; Mark J. Schulz; Vesselin Shanov; Saurabh Datta; Doug Hurd; Bo Westheider; Mannur Sundaresan; Anindya Ghoshal
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Paper Abstract

Detecting and locating cracks in structural components and joints that have high feature densities is a challenging problem in the field of Structural Health Monitoring. There have been advances in piezoelectric sensors, actuators, wave propagation, MEMS, and optical fiber sensors. However, few sensor-signal processing techniques have been applied to the monitoring of joints and complex structural geometries. This is in part because maintaining and analyzing a large amount of data obtained from a large number of sensors that may be needed to monitor joints for cracks is difficult. Reliable low cost assessment of the health of structures is crucial to maintain operational availability and productivity, reduce maintenance cost, and prevent catastrophic failure of large structures such as wind turbines, aircraft, and civil infrastructure. Recently, there have also been advances in development of simple passive techniques for health monitoring including a technique based on mimicking the biological neural system using electronic logic circuits. This technique aids in reducing the required number of data acquisition channels by a factor of ten or more and is able to predict the location of a crack within a rectangular grid or within an arbitrarily arranged network of continuous sensors or neurons. The current paper shows results obtained by implementing this method on an aluminum plate and joint. The plates were tested using simulated acoustic emissions and also loading via an MTS machine. The testing indicates that the neural system can monitor complex joints and detect acoustic emissions due to propagating cracks. High sensitivity of the neural system is needed, and further sensor development and testing on different types of joints is required. Also indicated is that sensor geometry, sensor location, signal filtering, and logic parameters of the neural system will be specific to the particular type of joint (material, thickness, geometry) being monitored. Also, a novel piezoresistive carbon nanotube nerve crack sensor is presented that can become a neuron and respond to local crack growth.

Paper Details

Date Published: 27 July 2004
PDF: 10 pages
Proc. SPIE 5384, Smart Structures and Materials 2004: Smart Sensor Technology and Measurement Systems, (27 July 2004); doi: 10.1117/12.540174
Show Author Affiliations
Goutham R. Kirikera, Univ. of Cincinnati (United States)
Vishal Shinde, Univ. of Cincinnati (United States)
Inpil Kang, Univ. of Cincinnati (United States)
Mark J. Schulz, Univ. of Cincinnati (United States)
Vesselin Shanov, Univ. of Cincinnati (United States)
Saurabh Datta, Univ. of Cincinnati (United States)
Doug Hurd, Univ. of Cincinnati (United States)
Bo Westheider, Univ. of Cincinnati (United States)
Mannur Sundaresan, North Carolina A&T State Univ. (United States)
Anindya Ghoshal, United Technologies Research Ctr. (United States)

Published in SPIE Proceedings Vol. 5384:
Smart Structures and Materials 2004: Smart Sensor Technology and Measurement Systems
Eric Udd; Daniele Inaudi, Editor(s)

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