Chirpy outlook

A technique adapted from the echo- location method used by bats and used to improve radar performance could prove to be an effective way of detecting dangerous defects in aircraft, racing cars and spacecraft.

An Anglo-Indian project will analyse the efficiency of a thermography method called Frequency Modulated Thermal Wave Imaging. Thermography involves examining heat as it flows across an inspected part. If a crack that could lead to failure is present, it will trap heat and this will show up on infrared camera scans.

The technique, dubbed 'chirp modulation' after the sound emitted by bats, involves heating up an inspected part by shining a light modulated over a range of frequencies on to it.

The project, involving

and the

, will compare the effectiveness of various forms of thermography. The aim is to establish a quick and accurate way of inspecting for cracks and other damage; this is even more esssential today as more aircraft, racing cars and other engineering structures are made from carbon composite material rather than metal to reduce weight.