An asynchronous sensor skin for structural health monitoring applications

Nathan Sharp; Alan Kuntz; Cole Brubaker; Stephanie Amos; Wei Gao; Gautam Gupta; Aditya Mohite; Charles Farrar; David Mascareñas

doi:10.1117/12.2045093

10 April 2014 An asynchronous sensor skin for structural health monitoring applications

Nathan Sharp, Alan Kuntz, Cole Brubaker, Stephanie Amos, Wei Gao, Gautam Gupta, Aditya Mohite, Charles Farrar, David Mascareñas

Author Affiliations +

Proceedings Volume 9061, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2014; 90611R (2014) https://doi.org/10.1117/12.2045093
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2014, San Diego, California, United States

Abstract

In crack detection applications large sensor arrays are needed to be able to detect and locate cracks in structures. This paper analyzes different sensor shapes and layouts to determine the layout which provides the optimal performance. A “snaked hexagon” layout is proposed as the optimal sensor layout when both crack detection and crack location parameters are considered. In previous work we have developed a crack detection circuit which reduces the number of channels of the system by placing several sensors onto a common bus line. This helps reduce data and power consumption requirements but reduces the robustness of the system by creating the possibility of losing sensing in several sensors by a single broken wire. In this paper, sensor bus configurations are analyzed to increase the robustness of the bused sensor system. Results show that spacing sensors in the same bus out as much as possible increases the robustness of the system and that at least 3 buses are needed to prevent large segments of a structure from losing sensing in the event of a bus failure.

Citation Download Citation

Nathan Sharp, Alan Kuntz, Cole Brubaker, Stephanie Amos, Wei Gao, Gautam Gupta, Aditya Mohite, Charles Farrar, and David Mascareñas "An asynchronous sensor skin for structural health monitoring applications", Proc. SPIE 9061, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2014, 90611R (10 April 2014); https://doi.org/10.1117/12.2045093

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