Method and system in the classification of objects occupying a seat
First Claim
1. A method for classifying an object occupying a seat, for a classification-dependent triggering of a restraint system in a motor vehicle, the method comprising:
- determining, based on a signal of at least one acceleration sensor that senses acceleration of the vehicle, first forces acting on the object in a horizontal plane as to their magnitude;
determining, based on a signal of at least one pressure sensor, second forces exerted on the seat by the object in a direction that is perpendicular to the horizontal plane as to their magnitude;
determining, based on the determined magnitudes of the first and second forces, physical variables of the object, the physical variables including a position of a center of mass of the object with respect to each of three axes, each of the axes being perpendicular to the other two of the axes; and
using the determined physical variables to classify the object.
1 Assignment
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Accused Products
Abstract
A method and a system in the classification of objects occupying a seat, in particular for the reliable control of the triggering of restraint systems in motor vehicles. Utilized are the dynamics of a person seated on the seat, based on the acceleration forces acting on the person. Using the variables of these forces and the force exerted on the seat cushion of the seat by the mass of the person and its change, there is a determination, as a redundant variable, the mass, the location of the center mass and other physical variables and these are used for the reliable classification.
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Citations
12 Claims
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1. A method for classifying an object occupying a seat, for a classification-dependent triggering of a restraint system in a motor vehicle, the method comprising:
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determining, based on a signal of at least one acceleration sensor that senses acceleration of the vehicle, first forces acting on the object in a horizontal plane as to their magnitude; determining, based on a signal of at least one pressure sensor, second forces exerted on the seat by the object in a direction that is perpendicular to the horizontal plane as to their magnitude; determining, based on the determined magnitudes of the first and second forces, physical variables of the object, the physical variables including a position of a center of mass of the object with respect to each of three axes, each of the axes being perpendicular to the other two of the axes; and using the determined physical variables to classify the object. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A system for classifying an object occupying a seat, for a classification-dependent triggering of a restraint system in a motor vehicle having acceleration sensors in the vehicle comprising:
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a first determining arrangement to determine; first forces acting on the object in a horizontal plane as to their magnitude, the first forces being determined based on a signal of the acceleration sensors; and second forces exerted on the seat by the object in a direction that is perpendicular to the horizontal plane as to their magnitude, the second forces being determined based on a signal of at least one pressure sensor; and a second determining arrangement to determine based on the determined magnitudes of the first and second forces, physical variables of the object, the physical variables including a position of a center of mass of the object with respect to each of three axes, each of the axes being perpendicular to the other two of the axes; and an arrangement using the determined physical variables to classify the object. - View Dependent Claims (9, 10, 11, 12)
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Specification