Erodable sensor for progressive brake wear detection

摘要

A progressive brake lining wear having a triangular wedged shaped resistive member disposed between a pair of conductive plates to define a triangular shaped sensor. The sensor is disposed within an erodable molding and connected to a sensing circuit. A pair of leads are connected one each to a ground lead and a resistive lead which in turn are connected to a closed sensing circuit. The ground lead and resistance lead and thermistor lead emerge from the encapsulated sensor for connection to the sensing circuit. The sensor is disposed within the brake lining and is connected to the brake shoe. As the brake lining progressively wears, the triangular wedged shaped resistive member is progressively worn away thus continuously changing the overall resistance of the sensor. The change in resistance provides for continuous indicates of the state of wear.