U.S. Department of Transportation
Federal Highway Administration
1200 New Jersey Avenue, SE
Washington, DC 20590
Federal Highway Administration Research and Technology
Coordinating, Developing, and Delivering Highway Transportation Innovations
|Project Name:||Nanoscale Sensors for Structural Health|
|Start Date:||March 5, 2010|
|End Date:||September 27, 2013|
|Office:||Office of Infrastructure Research and Development|
|Team:||Infrastructure Management Team [HRDI-60]|
|Program:||Exploratory Advanced Research|
|Roadmap/Focus area(s):||Infrastructure Research and Technology Strategic Plan and Roadmap|
|Project Description:||This project will investigate self-powered, very large-area wireless sensors for the real-time monitoring of potentially dangerous cracks in steel bridges. The sensing elements are made by inkjet printing nanoparticles onto flexible organic substrates. Carbon nanotube-based materials will be explored for scavenging solar and vibrational energy to power the sensor nodes. Multiscale wireless communication approaches are proposed for convenient access to the sensor data over the Internet.|
The key project objectives are:
(1) Strain and crack monitoring using a single wireless nanosensor. Testing must detect a 1-mm crack and a strain measurement of 10,000 με with a resolution of 10 με.
(2) Strain and crack monitoring using wireless nanosensor arrays. Must maintain same measurement criteria for a single nanosensor on an array up to 100 sensors while being read from a Radio Frequency Identification (RFID) 15 m away.
(3) Carbon nanotube-based energy harvesting for the wireless nanosensors. The sensor array must be capable of providing measurement at any time of day.
(4) Testing specimens with more complex geometries. Must achieve same success criteria as shown for simple specimens.
(5) Field Validation. Minimum continuous operation time in the field of three months.
|Background Information:||Project submitted in response to a fiscal year 2007 Exploratory Advanced Research Program solicitation.|
|Field Test:||The team will field validate the sensors with the requirement that the same testing criteria be met in the field for three months.|
|Test Methodology:||Progressively develop the sensor by first demonstrating the capability of a single sensor on a known crack and then moving on to a sensor array capable of determining unknown crack properties and introducing energy harvesting nanotubes. All early work will be performed in the laboratory before moving to the field for final testing.|
|Expected Benefits:||Self-powering sensors, nanosensors for crack detection, remote access to nanosensors|
|Deliverables:||The deliverable is a report summarizing the approach and findings of the research.|
|FHWA Topics:||Roads and Bridges--Structures|
|TRT Terms:||Safety and Security
|Subject Areas:||Bridges and other structures
Maintenance and Preservation