Measuring arrangement for determining the distance to a magnetic alternating field source and method for measuring the distance between a magnetic sensor arrangement and a magnetic alternating field source

摘要

Measuring arrangement for determining the distance (a) to a magnetic alternating field source (7), with a magnetic sensor arrangement (8), by means of a characteristic magnetic alternating field signal of the magnetic alternating field source (7) is detectable, and an evaluation device (12) which, on the magnetic sensor arrangement (8) is connected and by means of which the of the magnetic sensor arrangement (8) detected characteristic magnetic alternating field signals of the magnetic alternating field source (7) and can be evaluated in the distance (a) between the magnetic alternating field source (7) on the one hand and the magnetic sensor arrangement (8), on the other hand, can be converted, wherein the magnetic sensor arrangement (8) at least two magnetic field sensors (9, 10), characterized in that the at least two magnetic field sensors (9, 10) of the magnetic sensor arrangement (8) in a fixed distance (b) to one another on a movement axis (x) are disposed on and along the same, the magnetic alternating field source (7) in relation to the magnetic sensor arrangement (8) is movable, that the evaluating device (12) has a control unit (15), by means of which the magnetic alternating field source (7) can be fed to a carrier signal, that the frequency of the carrier signal approximately 100 times greater than a frequency of a the characteristic magnetic alternating field signal corresponding low-frequency useful signal of the magnetic alternating field source (7) is,n="15" a transmission signal of the magnetic alternating field source (7) the with the useful signal of the magnetic alternating field source (7) is modulated carrier signal, and that in the evaluation device (12) a signal processing on the basis of the low-frequency useful signal can be carried out.