Method and system for determining the distance between a profiled surface from a functional surface moving in relation thereto by using two exploring coils

摘要

A method and a system are disclosed for determining the distance between a conducting surface which is profiled in the direction of distance determination and a functional surface moving in relation to the surface by using a measuring system. Two exploring coils are applied to an oscillator system and are connected on the output end to an analog-to-digital converter via a demodulator, the analog-to-digital converter being connected to an arithmetic module. In at least one embodiment of the invention, a method and a system are provided which allow to effect a distance measurement substantially uninfluenced by the profile of the conducting surface and by variations in ambient temperature. For this purpose, a sensor is used whose second exploring coil is mounted on the first exploring coil facing away from the surface at a defined, known distance. An arithmetic module calculates the distance of the functional surface from the profiled surface using the digital measured values to the two exploring coils and a digital reference value and the fixed distance.