05-08-2021 дата публикации
Номер: US20210239731A1
Принадлежит:
A method for calibrating a radial acceleration sensor of a wheel of a vehicle including the following steps: acquisition, by the sensor, of signals S, each signal Sbeing acquired during a predetermined time window Wwhen the vehicle is in motion, the windows Wbeing different from one another; detection, for each time window W, of local extrema of the signal Sassociated respectively with phase values and detection instants; determination, for each time window W, of a frequency Fof the rotation of the wheel of the vehicle as a function of the phase values and of the detection instants for the local extrema detected; low-pass filtering of the signals S, so as to obtain, for each time window W, a filtered value Z; calibration of a constant error Eof the radial acceleration sensor as a function of the filtered values Zand of the frequencies F. 1. A method for calibrating a radial acceleration sensor of a wheel of a motor vehicle , said method comprising:{'sub': i', 'i', 'i', 'i, 'an acquisition step of acquisition, by the radial acceleration sensor, of signals S, each signal Sbeing acquired during a predetermined time window Wwhen the vehicle is in motion, the windows Wbeing different from one another,'}{'sub': i', 'i, 'a detection step of detecting, for each time window W, at least three local extrema of the signal Swhich are respectively associated with phase values and with detection instants,'}{'sub': i', 'i', 'i, 'a determination step of determining, for each time window W, a frequency Fof the rotation of the wheel of the vehicle as a function of the phase values and of the detection instants for the local extrema detected in said time window W,'}{'sub': i', 'i', 'i', 'i, 'a filtering step of low-pass filtering of the signals S, so as to obtain, for each time window W, a filtered value Zassociated with the frequency F, and'}{'sub': c', 'i', 'i, 'a calibration step of calibrating a constant error Eof the radial acceleration sensor as a function of the filtered values ...
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