Embodiments of the present disclosure provide for dynamic iterative baseline adjustment. Such embodiments provide improvements to sensors requiring such adjustments, for example by better accounting for baseline drift and/or other baseline inaccuracies of a sensor. In one example context, a gas sensor is provided that performs such dynamic iterative baseline adjustment to better calibrate the output value of the gas sensor. Some embodiments include determining a set of measured values comprises a number of low-point measured values that exceeds a baseline updating threshold, determining an updated baseline value set, for example by determining an average low-point measured value for each baseline factor interval of a set of baseline factor intervals, and updating the baseline value set to the updated baseline value set, and optionally performing a corrective baseline algorithm on the updated baseline value set. The updated baseline value set may be utilized to correct subsequently measured raw data values.

A dynamic displacement error compensation system by which detection error information obtained based on calibration detection of first and second axes, is respectively made into first and second compensation tables for compensating displacement on the axes by using positional information of the axes as variables, the first compensation table is stored in a first driver of a first motor device for driving a first moving element to move linearly on the first axis, the second compensation table is stored in a second driver of a second motor device for driving a second moving element to move linearly on the second axis, the drivers simultaneously or successively obtain a first dynamic positional information of the first moving element on the first axis and a second dynamic positional information of the second moving element on the second axis, and the moving elements are respectively displaceably compensated according to the compensation tables.

A correction apparatus for an angle sensor includes a correction processing unit, an indicator value generation unit, and a correction information determination unit. The correction processing unit performs correction processing on a plurality of detection signals to reduce an error of a detected angle value. The details of the correction processing are determined according to correction information. The indicator value generation unit generates, on the basis of the plurality of detection signals, an indicator value having a correspondence with the error of the detected angle value. The correction information determination unit generates an estimated indicator value using a function that takes one or more values each having a correspondence with the correction information as one or more variables, and determines the correction information by adaptive signal processing so as to reduce the difference between the indicator value and the estimated indicator value.

A method and apparatus for determining the position of a motor-driven actuating part, in particular a window, a sliding roof, a boot lid, a sliding door or a seat, wherein a current position is determined and, in order to determine the current position, a position newly determined for this purpose is taken into account in conjunction with a last valid position, wherein the current position is selected to be between these two positions and closer to that position which has a comparatively lower uncertainty.

In a linear displacement sensor, two magnets with different polarities define one pitch of a magnetic scale. kn (k is a natural number greater than or equal to 2, n is a natural number greater than or equal to 1) sensor units configured to output a plurality of signals whose period is one pitch and whose phases with respect to the pitch are different are arranged along the magnetic scale in a one-pitch segment. Periodic errors with n periods per pitch of the sensor units are canceled out by averaging the phases from the kn sensor units.

Disclosed is a camshaft or crankshaft sensor including a toothed target, a measuring cell adapted to supply a raw signal and a processor module having two modes of operation: 1) a measurement mode in which the processor module is adapted to supply an output port of the sensor a measurement signal representing the times of passage of the teeth of the target at the level of the measuring cell; and 2) a diagnostic mode in which the processor module is adapted to supply at the output port of the sensor a diagnostic signal different from the measurement signal and representing the amplitude of the raw signal. Also disclosed is a method and a module for diagnosing such a sensor.

Adjusting emulated encoder frequencies in an example embodiment can include determining a difference between an encoder count and a theoretical encoder count and adjusting a frequency of an emulated encoder signal to mitigate at least some of the difference between the encoder count and the theoretical encoder count.

A resolver system includes a rotatable primary winding, a secondary winding fixed relative to the rotatable primary winding, a tertiary winding fixed relative to the rotatable primary winding and positioned π/2 radians out of phase with respect to the fixed secondary winding, an excitation module electrically connected to the rotatable primary winding and configured to provide an excitation signal to the rotatable primary winding where the excitation signal is an alternating current waveform having a fundamental frequency, and a controller electrically connected to the secondary winding and configured to sample a voltage across the secondary winding at 18 times the fundamental frequency, sample a voltage across the tertiary winding at 18 times the fundamental frequency, and determine an amplitude of the fundamental frequency based on the sampled voltages across the secondary and tertiary windings, where the alternating current waveform includes a third harmonic frequency.

There is provided an interpolation circuit of an optical encoder including a phase shifter circuit, two multiplexers, two digital circuits and four comparators. The phase shifter circuit receives signals sequentially have a 90 degrees phase shift and outputs multiple phase shifted signals. Each of the two multiplexers receives a half of the multiple phase shifted signals and outputs two pairs of phase shifted signals, each pair having 180 degrees phase difference, respectively to two comparators connected thereto. Each of the two digital circuits controls the corresponding multiplexer to select the two pairs of phase shifted signals from the half of the multiple phase shifted signals.

A method for compensating a road line includes deriving a length of a left road line and a length of a right road line, recognized by a sensor, and determining a left road line level and a right road line level based on the length of the left road line and the length of the right road line; correcting the left road line level and the right road line level based on a change in the lengths of the left road line and the right road line or a change in curvatures of the left road line and the right road line; calculating a correction coefficient based on the corrected left road line level and the corrected right road line level; and correcting, by the correction coefficient, information about a road line with a lower level of the corrected left road line level and the corrected right road line level.