| 摘要 |
The sensor for sensing an angular orientation of a magnetic field of a magnet comprises - N > 2 Hall effect devices (HD1, HD2,...), each having a detection direction and comprising a first and a second pair of connectors, wherein, in presence of the magnetic field, a flow of an electric current between the connectors of the first pair allows to pick up a Hall voltage between the connectors of the second pair induced by the magnetic field, unless a magnetic field component of the magnetic field along the detection direction is zero, wherein the N Hall effect devices are aligned such that they have a common detection direction lying along an axis; - a filtering-or-resonating unit (F) comprising an input and an output, wherein a signal outputted from the output is referred to as filtered signal; - a wiring unit (W) operationally connected to the respective second pair of connectors of each of the N Hall effect devices, structured and configured for selectively operationally connecting the connectors of the second pairs to the input of the filtering-or-resonating unit; - a control unit (L) structured and configured for controlling the wiring unit in such a way that during a first time period of a duration Tf and in a fixed sequence of the N Hall effect devices, each of the N Hall effect devices is, with its second pair of connectors, successively operationally connected to the input of the filtering-or-resonating unit; - an output unit (4) operationally connected to the output of the filtering-or- resonating unit structured and configured for obtaining from a filtered signal an output signal related to the angular orientation and outputting the output signal; wherein the filtering-or-resonating unit (F) is structured and configured like a band pass filter having a fundamental frequency f = 1 / Tf. |
