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.