Development of a magnetic seat sensor for monitoring condition of a car driver

The purpose of our research is to develop the prevention system of a car driver's dozing off at the wheel by a magnetic sensor, which is built in driver's seats of cars and trucks. Torsion bars are ones of the parts of the car driver's seat. Torsion stress occurs in these bars when a car driver sits on the seat, and these bars works as a cushion to the driver. In this research, we tried to measure difference of magnetic properties of those torsion bars because of the torsion stress by a magnetic sensor to apply it to monitor car driver's condition.