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Design Formation
A ‘sensing skin’ for concrete (MIT)
In 2009, the American Society of Civil Engineers (ASCE) assigned a grade of
“D” to the overall quality of infrastructure in the United States, saying that
ongoing evaluation and maintenance of structures was necessary to improve that
grade. Since then, federal stimulus funds have made it possible for
communities to repair some infrastructure, but high-tech, affordable methods
for continual monitoring remain in their infancy. Instead, most evaluation of
bridges, dams, schools and other structures is still done by visual
inspection, which is slow, expensive, cumbersome and in some cases, dangerous.
Civil engineers at MIT, working with physicists at the University of Potsdam
in Germany, recently proposed a new method for continual electronic monitoring
of structures. In papers appearing in the journals _Structural Control Health
Monitoring_ and _Journal of Materials Chemistry_, the researchers describe a
flexible fabric with electrical properties that could adhere to areas prone to
cracking — such as the undersides of bridges — and detect cracks almost
immediately when they occur.
Installing this “sensing skin” would be as simple as unrolling it and gluing
it to the surface of a structure. The rectangular patches on the skin that
detect changes in its electrical charge could ...
Langara College's Design Formation Grad Show 2011