New research could improve the performance of car crash sensors

A new research project aims to produce higher performance inertial sensors which could detect potential car accidents more accurately than any currently available.

Dr Michael Kraft and his team at the University of Southampton’s School of Electronics and Computer Science (ECS) are working with a Belgian company, Melexis, to develop innovative control and interface systems to improve the performance of existing micromachined sensors.

In this three-year research project, Melexis, a growing Belgium-based company, which produces integrated semiconductor device systems for use in the automotive market, has supplied micromachined accelerometers (devices for measuring acceleration) so that the team can assess and improve their performance using their interface and control circuits

‘There is a huge, just recently emerging demand for higher performance inertial sensors for intelligent automotive systems and many others,’ commented Dr Kraft. ‘Six to eight airbags are standard already; they need to be deployed by accelerometers that accurately sense the impact of a crash.’

According to Dr Kraft existing commercial accelerometers may not meet these increasing performance specifications. His research programme will take the Melexis accelerometer and use advanced electronics and control engineering to make it better, more versatile and easier to integrate at a system level.

‘This research suggests a radically different approach to improve the performance of these sensors, namely to work on the electronic interface and control systems aspects of these sensors, rather than the microfabricated sensing elements themselves,’ said Dr Kraft.

The prime beneficiaries of this research will be companies supplying sensors for automotive safety systems. Other applications such as for GPS (Global Positioning System) back-up systems, virtual reality systems, inertial navigation and guidance, and seismology, also require sensors with very high specification characteristics.

‘Little research has been done in this field, yet there is huge potential to make a real impact,’ said Dr Kraft. ‘With this approach it should be possible to develop a very versatile interface chip that can be used with a range of micromachined sensors.’