Radar-like signals detect flaws in structures and parts. (Testing/Analysis).

Advanced Materials & Processes,  February, 2002  

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A system in which radar-like signals detect when structures and mechanical parts are about to fail is under development at Purdue University, West Lafayette, Indiana. "Structural health monitoring" includes a network of devices that could be attached to an aircraft or vehicle, or embedded in components.

Some devices send out high-frequency sound waves, and others are arrays of sensors that detect acoustic signals by transmission or reflection. By continually comparing data from the sensors, the system can detect whether a material is ...

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