METHOD AND APPARATUS FOR DETECTING A RELATIVE MOVEMENT BETWEEN TWO BODIES BEING IN FRICTIONAL CONTACT WITH EACH OTHER

摘要

An apparatus is provided for determining a relative movement between two bodies wherein the movement causes a sliding friction between the bodies. The friction causes changes in electrical charges in the friction zone. An electrical conductor is located within the operative range of these changes. The conductor is connected with a device amplifying and further processing the potential fluctuations of the conductor occurring during the relative movement which is to be determined.