Method for calibrating a radial-acceleration sensor for the wheel of a motor vehicle

A method for calibrating a radial acceleration sensor of a wheel of a motor vehicle, said method comprising:

• an acquisition step of acquisition, by the radial acceleration sensor, of signals Si, each signal Si being acquired during a predetermined time window Wi when the vehicle is in motion, the windows Wi being different from one another,
• a detection step of detecting, for each time window Wi, at least three local extrema of the signal Si which are respectively associated with phase values and with detection instants,
• a determination step of determining, for each time window Wi, a frequency Fi of 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 Wi,
• a filtering step of low-pass filtering of the signals Si, so as to obtain, for each time window Wi, a filtered value Zi associated with the frequency Fi, and
• a calibration step of calibrating a constant error Ec of the radial acceleration sensor as a function of the filtered values Zi and of the frequencies Fi.