A first sensor signal and a second sensor signal are provided by a sensor unit to an evaluation unit. The first sensor signal is dependent on the angular position, and the second sensor signal is phase-shifted by 90° with respect to the first sensor signal. A noise value that is superimposed on each sensor signal due to noise in the corresponding sensor signal is determined by the evaluation unit. Each sensor signal is corrected by the evaluation unit based on the noise value determined for the corresponding sensor signal. Highest amplitudes for each of the first and second sensor signals are determined by the evaluation unit as a maximum value of amplitudes of the respective sensor signals detected over multiple revolutions of the rotational element. An angular portion of a rotational component is determined by the evaluation unit based on output from an atan2-function that takes the first and second sensor signals and the highest amplitudes as input.

A method for use in a sensor, comprising: generating a signal that is indicative of an angular position of a rotating target, the signal being generated by at least one magnetic field sensing element; adjusting the signal to produce an adjusted signal, the signal being adjusted based on a current value of a first adjustment coefficient; generating an output signal based on the adjusted signal; and updating the first adjustment coefficient, the updating including replacing the current value of the first adjustment coefficient with a new value of the first adjustment coefficient, the updating being performed by minimizing a function that is based on the current value of the first adjustment coefficient.

A sensor, comprising: a substrate having a reference crystal orientation and a plurality of vertical Hall element pairs that are formed on the substrate. Each vertical Hall element pair includes: (i) a respective first vertical Hall element that is oriented at a respective first angle relative to the reference crystal orientation of the substrate and (ii) a respective second vertical Hall element that is oriented at a respective second angle relative to the reference crystal orientation of the substrate. The substrate has a rectangular shape, and each of the vertical Hall element pairs is disposed in a different respective corner of the substrate.

In an electric motor control device which controls rotation of an AC electric motor having two sets of three-phase windings and provided with a resolver having two systems by calculating voltage command values on dq axes, dq conversion of currents of first three-phase windings is performed using a first angle calculated from output of the first system of the resolver, and dq conversion of currents of second three-phase windings is performed using a second angle calculated from output of the second system of the resolver. With both d-axis current command values set at the same value, respective voltage command values on dq axes are calculated and respectively converted into voltage command values for voltage application to the first three-phase windings, using the first angle, and converted into voltage command values for voltage application to the second three-phase windings, using the second angle.

Methods, apparatuses and systems for providing a position sensing component are disclosed herein. An example position sensing component may comprise: a sensing coil; a moveable core disposed within the sensing coil; an oscillator circuit; and a feedback control circuit coupled to the oscillator circuit, wherein the position sensing component is configured to: maintain a fixed amplitude voltage in response to a variable current signal provided by the oscillator circuit in conjunction with the feedback control circuit, and generate an oscillator circuit output signal that is linearly proportional to a position of the moveable core with respect to the sensing coil.

A filtering device is configured to estimate the characteristics of noise superposed on measurement data relating to the status of a controlled machine based on the status information representing the status of a controlled machine, thus adjusting the filtering to eliminate noise based on the estimated noise characteristics.

A method according to the invention is proposed for filtering a sensor signal, said method comprising various steps. A time-discrete sensor signal is provided as an input signal, and an output signal is generated via a continuous filtering of the input signal using a time-discrete filter in the time domain, which performs the following filter steps for each value of the input signal: comparing a specified signal value of a specified time index of the input signal with two further signal values of the input signal, wherein a first signal value of the two further signal values is temporally prior to the specified signal value and wherein a second signal value of the further signal values is temporally after the specified signal value, and replacing the specified signal value in the output signal by a new value in dependence on a value interval spanned by the two further signal values.

For cross-channel spectral analysis of measurement data from multiple recording units with independent sampling clocks, a processing method corrects phase mismatch between the data received over the different channels. Blocks of sampled measurement data are buffered in a hardware logic circuit and timestamps are associated with successive blocks through a hardware interrupt to a GPS receiver of each recording unit. For each first channel data block, the block's starting point, a closest point in time in a data block of the second channel, and the starting point of that second channel data block are determined, using GPS timestamps associated with those data blocks, nominal sampling rate and block size. Phase correction based on the time offset between starting points of the pairs of data blocks and the interval between starting points of successive blocks is applied in the frequency domain after a time-to-frequency domain transformation. Multiple frames of phase-corrected spectra may then be averaged. Only a subset of samples in each data block need be used based upon a specified overlap ratio.

For cross-channel spectral analysis of measurement data from multiple recording units with independent sampling clocks, a processing method corrects phase mismatch between the data received over the different channels. Blocks of sampled measurement data are buffered in a hardware logic circuit and timestamps are associated with successive blocks through a hardware interrupt to a GPS receiver of each recording unit. For each first channel data block, the block's starting point, a closest point in time in a data block of the second channel, and the starting point of that second channel data block are determined, using GPS timestamps associated with those data blocks, nominal sampling rate and block size. Phase correction based on the time offset between starting points of the pairs of data blocks and the interval between starting points of successive blocks is applied in the frequency domain after a time-to-frequency domain transformation. Multiple frames of phase-corrected spectra may then be averaged. Only a subset of samples in each data block need be used based upon a specified overlap ratio.

A method for locating at least one movable magnetic object relative to a network of at least N tri-axial magnetometers linked together mechanically with no degree of freedom to retain a known relative position of these magnetometers, N being an integer number at least equal to 2, comprises, continuously: a step of detection of a magnetometer capable of being magnetized, i.e. capable of delivering as output measurements comprising a measurement bias following a magnetization; a step of correction, by means of a correction bias, of the measurements delivered by the magnetometer capable of being magnetized, the correction bias corresponding to a deviation between the measurements supplied by the magnetometer as input for a location filtering and the estimations, upon the location filtering, of the data delivered by the magnetometer; and a step of consideration of the magnetometer as not capable of being magnetized, by taking into account the step of correction of the magnetometer capable of being magnetized.