Method and apparatus for determining the position or change in position of an object on a measurement section

The present invention relates to a method and an apparatus for determining the position or change in position of an object on a measurement path, in particular for determining the tape or tape center position of a supported tape. In the method at least one high-frequency line is provided with an open line structure along at least a first part of the measurement path, which emits electromagnetic radiation along the first part of the measurement path for transmission of electromagnetic waves. Via the high frequency line, electromagnetic waves are transmitted and detects the transmitted electromagnetic waves and evaluated. the position or a change in position of the object on the measuring distance is then determined from a caused by the influence of the object on the transfer phase change and / or change in amplitude of the transmitted electromagnetic waves. The process can be integrated, for example. In manufacturing facilities for taped easily.