Absolute acceleration sensor for use within moving vehicles
First Claim
1. A method of detennining and using data describing absolute acceleration along various axes relative to a desired movement vector while moving relative to a gravity source, comprising:
- a. determining a vertical acceleration, perpendicular to the desired movement vector and substantially antiparallel to a gravitational acceleration due to the gravity source;
b. determining a longitudinal acceleration, parallel to the desired movement vector;
c. determining an inclination of the desired movement vector relative to the gravitational acceleration;
d. determining an absolute vertical acceleration and an absolute longitudinal acceleration from the longitudinal acceleration, the vertical acceleration, and the inclination of the desired movement vector; and
e. producing an output determined at least in part by one or more of the absolute vertical acceleration and the absolute longitudinal acceleration.
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Accused Products
Abstract
A method of and system for detecting absolute acceleration along various axes relative to a desired movement vector while moving relative to a gravity source includes steps of determining a vertical acceleration, perpendicular to the desired movement vector and substantially anti-parallel to a gravitational acceleration due to the gravity source; determining a longitudinal acceleration, parallel to the desired movement vector and to output at vertical acceleration signal and a longitudinal acceleration signal; determining an inclination of the desired movement vector relative to the gravitational acceleration; and processing the vertical acceleration signal, the longitudinal acceleration signal, and the inclination signal to produce an absolute vertical acceleration signal and an absolute longitudinal acceleration signal.
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Citations
20 Claims
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1. A method of detennining and using data describing absolute acceleration along various axes relative to a desired movement vector while moving relative to a gravity source, comprising:
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a. determining a vertical acceleration, perpendicular to the desired movement vector and substantially antiparallel to a gravitational acceleration due to the gravity source; b. determining a longitudinal acceleration, parallel to the desired movement vector; c. determining an inclination of the desired movement vector relative to the gravitational acceleration; d. determining an absolute vertical acceleration and an absolute longitudinal acceleration from the longitudinal acceleration, the vertical acceleration, and the inclination of the desired movement vector; and e. producing an output determined at least in part by one or more of the absolute vertical acceleration and the absolute longitudinal acceleration. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A system for determining and using data describing absolute acceleration along various axes relative to a desired movement vector while moving relative to a gravity source, comprising:
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a. a two-axis accelerometer configured to sense both a vertical acceleration, perpendicular to the desired movement vector and substantially antiparallel to a gravitational acceleration due to the gravity source, and a longitudinal acceleration, parallel to the desired movement vector and to output a vertical acceleration signal and a longitudinal acceleration signal; b. a gyroscope configured to sense an inclination of the desired movement vector relative to the gravitational acceleration and to output an inclination signal; c. a logic circuit configured to process the vertical acceleration signal, the longitudinal acceleration signal, and the inclination signal to produce an absolute vertical acceleration signal and an absolute longitudinal acceleration signal; and d. a controller configured to receive one or more of the absolute vertical acceleration signal and the absolute longitudinal acceleration signal and to produce an output determined at least in part by at least one of the absolute acceleration signals that it receives. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification