| 摘要 |
A device for the measuring and closed-loop control of a magnetic field generated by means of an electromagnet (5, 12, 15), comprising a first measuring device (10) for purposes of measuring the absolute magnetic field strength of the magnetic field, a second measuring device (11) for purposes of measuring the alteration of the magnetic field strength of the magnetic field, at least two integrators (20) for purposes of determining the magnetic field strength of the alteration of the magnetic field strength measured in the second measuring device (11), which integrators are arranged in parallel to one another, calibration means, a unit for purposes of comparing the magnetic field strength measured by the first measuring device (10) and the second measuring device (11), and a further unit for purposes of comparing the measured magnetic field strength with a prescribed design field strength, and a method. |
