US 11,866,145 B2
Device and method for self-correcting a sensed physical parameter, drone or unmanned aerial vehicle
Saumitra Sanjeev Chafekar, Munich (DE); and Ankit Kalbande, Munich (DE)
Assigned to Infineon Technologies AG, Neubiberg (DE)
Filed by Infineon Technologies AG, Neubiberg (DE)
Filed on Sep. 10, 2019, as Appl. No. 16/565,919.
Claims priority of application No. 18200717 (EP), filed on Oct. 16, 2018.
Prior Publication US 2020/0115039 A1, Apr. 16, 2020
Int. Cl. B64C 17/00 (2006.01); B64C 39/02 (2023.01); B64D 45/00 (2006.01)
CPC B64C 17/00 (2013.01) [B64C 39/02 (2013.01); B64D 45/00 (2013.01); B64U 2201/10 (2023.01)] 14 Claims
OG exemplary drawing
 
1. A device for sensing a physical parameter, comprising:
a sensor element configured for measuring the physical parameter and for outputting a corresponding measured signal, wherein the measured signal is influenceable by a sensor drift of the sensor element;
a corrector for correcting the measured signal output by the sensor element so as to obtain a corrected signal, wherein the corrector is configured for evaluating the measured signal to determine a drift effect of the sensor drift on the measured signal and for correcting the measured signal so as to compensate for the drift effect; and
a signal output configured for outputting the corrected signal,
wherein the corrector further comprises:
a compensator configured for combining the measured signal with a correction factor so as to obtain the corrected signal;
a drift evaluator configured for evaluating the measured signal to determine the drift effect and for adapting the correction factor so as to compensate for the drift effect;
a correction factor updater configured for adapting a correction factor applied to the measured signal for obtaining the corrected signal so as to compensate for the drift effect;
a measured signal evaluator configured for evaluating the measured signal with respect to a fast variation of the measured signal, wherein the measured signal evaluator comprises a fast pressure change detection filter; and
a correction factor evaluator configured for evaluating the correction factor with respect to a slow variation of the correction factor, wherein the correction factor evaluator comprises a slow pressure change detection filter,
wherein the corrector is configured to update the correction factor responsive to a detected fast variation in the measured signal and/or responsive to a detected slow variation of the correction factor,
wherein the corrector comprises a reference value updater configured for providing a reference value for determination of a correction value used for correcting the measured signal, wherein the reference value updater is configured for using a determined corrected value of the physical parameter contained in the corrected signal as reference value for a subsequent iteration of drift detection when no drift occurs and for updating the reference value in case a drift occurs, and
wherein an output of the fast pressure change detection filter is coupled to a first input of the reference value updater, and an output of the slow pressure change detection filter is coupled to a second input of the reference value updater.