Safety device for motor vehicle

A safety device for a motor vehicle seat comprising:

• a seat,
• an electric motor for moving the seat or a part of the seat,
• a control device configured for measuring/detecting at least one operating parameter of the motor among the voltage and/or the current of the motor and/or the speed of the motor, when the seat or the part of the seat is moving along a movement path when actuated by the motor, the control device being configured for ensuring that the motor is stopped when the at least one parameter of the current measurement crosses at least one threshold, and
• wherein the at least one threshold has a plurality of determined values associated with different positions of the seat or part of the seat along the movement path, at least in a movement direction of the seat or part of the seat, the control device being configured for, in at least one monitoring mode, detecting/measuring the current position of the seat or part of the seat along the movement path during its actuation by the motor, when the seat or part of the seat is moving in the movement direction, and comparing, for each of the different positions of the seat or part of the seat along the movement path, the current measurement of the at least one operating parameter of the motor with the value of the threshold associated with the operating parameter, determined for the position associated with the current position of the seat or part of the seat, and so as to set off the alarm and/or preferably stop the motor when the at least one threshold is crossed, and
• wherein the control device has calibration means configured for determining the values of the at least one threshold along the movement path, at the different positions of the seat or part of the seat along the movement path, at least in the movement direction, in at least one calibration mode of the control device, prior to the monitoring mode, by implementing the following steps:
• a measurement step a) in which the at least one operating parameter chosen among the voltage and/or the current and/or the speed of the motor is measured during at least one movement of the seat or part of the seat in the different positions of the seat or part of the seat along the movement path, at least in the movement direction, a step b) of determining the determined values of the at least one threshold in relation to the different positions of the seat, in the movement direction, by applying a tolerance margin relative to the values of the operating parameter detected/measured during step a).