Safety seat, notably for a child
AssigneeBluebeep
InventorsLaurent BAILLIARD, Louis Pascal DEVELAY, Patrick HERBAULT, Edouard DUPONT-MADINIER
Life of this patent
Estimating the term…
Abstract
A safety seat of the type having a seat part that is kept at a distance from the ground by a support system. The seat includes a detection system and signalling system, the latter being able to go off when it is shaken and/or unintentionally inclined.
Claims16
1-14. (canceled)
A safety seat comprising a seat base that is kept at a distance from the ground by support means, the safety seat comprising:
- detection means and signalling means, the signalling means being able to go off when said safety seat is shaken above a threshold level, said detection means including at least one accelerometer;
- means suitable for carrying out, with a given frequency, a series of (N) measurements of the acceleration undergone by said safety seat, along the measurement axes (x, y, z) of the accelerometer;
- means suitable for calculating, for each of the measurement axes (x, y, z), an average acceleration value;
- means suitable for calculating, for each of the measurement axes, a mean deviation corresponding to an average of the absolute value of the deviation of each measurement with the average acceleration value;
- means suitable for comparing the mean deviation for each of the measurement axes (x, y, z) with a threshold value, and
- means suitable for activating the signalling means when the mean deviation is at least equal to the threshold value.
The safety seat according to 15, wherein the detection means include at least one inclinometer.
A safety seat comprising a seat base that is kept at a distance from the ground by support means, the safety seat comprising:
- detection means and signalling means, the signalling means being able to go off when said safety seat is shaken above a threshold level, said detection means including at least one accelerometer;
- means suitable for carrying out, with a given frequency, a series of (N) measurements of the acceleration undergone by said safety seat, along the measurement axes (x, y, z) of the accelerometer;
- means suitable for establishing a linear regression line for at least one of the measurement axes (x, y, x) from measurements of the acceleration undergone by said safety seat for said at least one axis using the least squares method;
- means suitable for measuring the distance between the linear regression line and the measurements of the acceleration undergone by said safety seat for said at least one axis, said measured distance corresponding to a shaking of the seat along said at least one axis, and
- means suitable for activating the signalling means when the measured distance is above a threshold value.
Dependencies are inferred from the claim text.