2results about How to "Compensation for non-linearity" patented technology

This invention relates to a method, apparatus, device, and medium for self-calibration error compensation in TMR current acquisition. The method dynamically injects a reference signal into the TMR current acquisition circuit through a built-in standard signal excitation source module; synchronously acquires the mixed response of the original signal and the reference signal; separates the original signal and the reference signal in the mixed response using digital signal processing technology to obtain the measured values ​​of the original signal and the reference signal; analyzes the difference between the measured values ​​of the reference signal and the reference signal in real time, establishes a multi-dimensional error vector, and obtains a dynamic error compensation matrix. The dynamic error compensation matrix includes a compensation amplitude term, a compensation phase term, and a compensation harmonic distortion term, with adaptive weight coefficients for each term determined based on the signal-to-noise ratio, phase difference, and frequency, respectively; and dynamically corrects the measured value of the original signal based on the dynamic error compensation matrix to achieve adaptive error compensation. Compared with existing technologies, this invention has advantages such as the ability to achieve adaptive calibration.

A method and a sensor system for calibrating a magnetic sensor system are provided. The position of the magnetic structure varies within a calibration range when measuring at least four components of the magnetic field generated by the magnetic structure having a main orbit and a nonius orbit. The uncalibrated position of the structure is determined and compared with a corresponding reference position. A periodic function is obtained by calculating two coefficients of a function such that the function applied to the uncalibrated position minimizes the error caused by the comparison with the reference position.