DESIGN OF A BALANCE SENSOR FOR AUTOMOTIVE APPLICATION

This paper reports the design of a balance sensor which can detect til t and direction angles. An electromagnetic proximity sensor is employe d for the detection of the tilt angle. The maximum tilt angle is 18.9- degrees. On the other hand, the direction angle is measured by a linea r resistive circuit and the range of this angle is 360-degrees, with a resolution of 0.0915-degrees. Tilt-angle detection is based on the el ectromagnetic interaction between a metal ball and a flat thin-film co il, which forms part of an oscillatory circuit. The results of differe nt coil-geometry parameters are presented. It is found that the coil g eometry and the uniformity of the thin-film resistor for detecting til t and direction angles, respectively, are very important parameters co ntributing to the performance of the sensor.