Inductive displacement transducer, coding device, and method for detecting a position of a first object in relation to a second object

摘要

The invention relates to an inductive displacement sensor for determining a position of a first object relative to a second object having a coding device to be attached to the first object, having a sensor unit to be attached to the second object, said sensor unit comprising a plurality of inductive sensors for scanning the coding device. The inductive displacement sensor according to the invention is characterized in that the coding device comprises a plurality of marking sections separated from one another by measurement sections, at least the measurement sections having variable widths, in that the marking sections and the measurement sections have different physical properties to aid differentiation by the sensor unit, in that identification regions are formed by the measurement sections or by the measurement sections along with adjacent marking sections, in that the sensor unit is at least long enough in the extension direction of the coding device and the number of inductive sensors is at least great enough that at least one identification region may be detected in every measurement situation, and in that, in order to distinctly associate an identification region with an absolute position of the sensor unit relative to the coding device, each identification region occurs precisely once on the coding device. The invention further relates to a coding bar and a method for determining a position of a first object relative to a second object.