A distance sensor for measuring a distance to a ferromagnetic element, a magnetic levitation system, and a method for measuring a distance to a ferromagnetic element

摘要

The present disclosure relates to a distance sensor for measuring a distance to a ferromagnetic element, a magnetic levitation system for magnetically levitating a ferromagnetic element, and a method for compensating for stray magnetic fields in a distance sensor. According to a first aspect, a distance sensor for measuring a distance to a ferromagnetic element is provided. According to a second aspect, there is provided a magnetic levitation system for magnetically levitating a ferromagnetic element, the magnetic levitation system comprising at least one electromagnetic actuator and at least one distance sensor according to the first aspect, the at least one distance sensor is configured to measure the distance to the ferromagnetic element. According to a third aspect, there is provided a method for measuring a distance to a ferromagnetic element, the method comprising: providing a distance sensor comprising a first Hall element and a second Hall element; a first signal of the first Hall element; and detecting a second signal of the second Hall element, and subtracting the second signal from the first signal. According to a fourth embodiment, there is provided use of a distance sensor according to the first aspect, wherein the distance sensor is used in a magnetic levitation device, the distance sensor being configured to measure a distance to an injured body.