United States Department of Transportation
i
Multi-Sensor Sheets Based on Large-Area Electronics for Advanced Structural Health Monitoring of Civil Infrastructure
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2014-09-01
[PDF-2.39 MB]
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Abstract:Structural Health Monitoring has a great potential to provide valuable information about the actual structural condition and can help optimize the management activities. However, few effective and robust monitoring technology exist which hinders a nationwide use of SHM in on-site application for structural condition evaluations. The objective of this research was to develop and evaluate a prototype of a novel multi-sensor sheet that is inexpensive, can be equipped with a variety of different sensors, easy to fabricate and deploy, and which provides densely spaced quantitative measurements from large areas of a structure. This sheet is based on technology called large-area electronics and consists of dense arrays of sensors supporting several different electronic components (interconnects, circuits, batteries, etc.) that are patterned or laminated on a polyimide substrate. The sensors that can be incorporated in this sheet are, for example, strain gauges, temperature and humidity sensors, and piezoelectric transducers. At this stage, the development focused on strain sensors and piezoelectric transducers to address the challenges presented above. The design principles for sensing sheet were created. Prototypes ere manufactured and successfully tested in laboratory under fatigue crack condition. Different configurations of sensors were tested to assess their performances. Data analysis algorithms were elaborated. The project description and outcomes are presented in detail in the report.
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