Method for vehicular control
First Claim
1. A method for vehicular control, said method comprising:
- providing a forward viewing camera at a vehicle so as to have a field of view forward of the vehicle;
providing a yaw rate sensor at the vehicle, the yaw rate sensor operable to sense angular rotational velocity of the vehicle about a local vertical axis of the vehicle;
providing a longitudinal accelerometer at the vehicle, the longitudinal accelerometer operable to sense a forward or reverse acceleration of the vehicle;
providing a speed sensor at the vehicle, the speed sensor operable to sense speed of the vehicle;
providing a control system at the vehicle, the control system comprising a processor operable to process outputs received from the yaw rate sensor, the longitudinal accelerometer and the speed sensor;
sensing, via the yaw rate sensor, angular rotational velocity while the vehicle is moving, and providing an output of the yaw rate sensor to the control system;
sensing, via the longitudinal accelerometer, forward or reverse acceleration while the vehicle is moving, and providing an output of the longitudinal accelerometer to the control system;
sensing, via the speed sensor, speed of the vehicle while the vehicle is moving, and providing an output of the speed sensor to the control system;
determining, while the vehicle is moving forward, and via processing by the processor of the output provided by the yaw rate sensor, an angular rotational velocity of the vehicle about the local vertical axis of the vehicle;
determining, while the vehicle is moving forward and responsive at least in part to the determined angular rotational velocity, a yaw rate offset of the yaw rate sensor;
determining, while the vehicle is moving forward and via processing by the processor of the output provided by the longitudinal accelerometer, a longitudinal acceleration of the vehicle;
determining, via the control system, a corrected yaw rate responsive to the determined yaw rate offset of the yaw rate sensor and the determined longitudinal acceleration of the vehicle;
determining, via the control system, a projected driving path of the vehicle based at least in part on the determined corrected yaw rate;
detecting, at least in part via processing by the processor of image data captured by the camera, an object present in the field of view of the camera;
determining, at least in part responsive to detecting the object and to the projected driving path, a hazard condition ahead of the vehicle in the projected driving path; and
automatically applying the brakes of the vehicle responsive to the determined hazard condition.
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Accused Products
Abstract
A method for vehicular control includes providing a forward viewing camera, a yaw rate sensor, a longitudinal accelerometer, a speed sensor and a control system at the vehicle. While the vehicle is moving, an angular rotational velocity of the vehicle about a local vertical axis is determined, a yaw rate offset is determined, and a longitudinal acceleration is determined. A corrected yaw rate is determined responsive to the determined yaw rate offset of the yaw rate sensor and the determined longitudinal acceleration of the vehicle. The control system determines a projected driving path of the vehicle based at least in part on the determined corrected yaw rate. A hazard condition ahead of the vehicle in the projected driving path is determined at least in part responsive to detecting an object and to the projected driving path. The system automatically applies the brakes of the vehicle responsive to the determined hazard condition.
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Citations
20 Claims
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1. A method for vehicular control, said method comprising:
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providing a forward viewing camera at a vehicle so as to have a field of view forward of the vehicle; providing a yaw rate sensor at the vehicle, the yaw rate sensor operable to sense angular rotational velocity of the vehicle about a local vertical axis of the vehicle; providing a longitudinal accelerometer at the vehicle, the longitudinal accelerometer operable to sense a forward or reverse acceleration of the vehicle; providing a speed sensor at the vehicle, the speed sensor operable to sense speed of the vehicle; providing a control system at the vehicle, the control system comprising a processor operable to process outputs received from the yaw rate sensor, the longitudinal accelerometer and the speed sensor; sensing, via the yaw rate sensor, angular rotational velocity while the vehicle is moving, and providing an output of the yaw rate sensor to the control system; sensing, via the longitudinal accelerometer, forward or reverse acceleration while the vehicle is moving, and providing an output of the longitudinal accelerometer to the control system; sensing, via the speed sensor, speed of the vehicle while the vehicle is moving, and providing an output of the speed sensor to the control system; determining, while the vehicle is moving forward, and via processing by the processor of the output provided by the yaw rate sensor, an angular rotational velocity of the vehicle about the local vertical axis of the vehicle; determining, while the vehicle is moving forward and responsive at least in part to the determined angular rotational velocity, a yaw rate offset of the yaw rate sensor; determining, while the vehicle is moving forward and via processing by the processor of the output provided by the longitudinal accelerometer, a longitudinal acceleration of the vehicle; determining, via the control system, a corrected yaw rate responsive to the determined yaw rate offset of the yaw rate sensor and the determined longitudinal acceleration of the vehicle; determining, via the control system, a projected driving path of the vehicle based at least in part on the determined corrected yaw rate; detecting, at least in part via processing by the processor of image data captured by the camera, an object present in the field of view of the camera; determining, at least in part responsive to detecting the object and to the projected driving path, a hazard condition ahead of the vehicle in the projected driving path; and automatically applying the brakes of the vehicle responsive to the determined hazard condition. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method for vehicular control, said method comprising:
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providing a forward viewing camera at a vehicle so as to have a field of view forward of the vehicle; providing a yaw rate sensor at the vehicle, the yaw rate sensor operable to sense angular rotational velocity of the vehicle about a local vertical axis of the vehicle; providing a longitudinal accelerometer at the vehicle, the longitudinal accelerometer operable to sense a forward or reverse acceleration of the vehicle; providing a speed sensor at the vehicle, the speed sensor operable to sense speed of the vehicle; providing a steering angle sensor at the vehicle, the steering angle sensor operable to sense a steering angle of the vehicle; providing a control system at the vehicle, the control system comprising a processor operable to process outputs received from the yaw rate sensor, the longitudinal accelerometer and the speed sensor; sensing, via the yaw rate sensor, angular rotational velocity while the vehicle is moving, and providing an output of the yaw rate sensor to the control system; sensing, via the longitudinal accelerometer, forward or reverse acceleration while the vehicle is moving, and providing an output of the longitudinal accelerometer to the control system; sensing, via the speed sensor, speed of the vehicle while the vehicle is moving, and providing an output of the speed sensor to the control system; sensing, via the steering angle sensor, the steering angle of the vehicle while the vehicle is moving, and providing an output of the steering angle sensor to the control system; determining, while the vehicle is moving forward and via processing by the processor of the output provided by the yaw rate sensor, an angular rotational velocity of the vehicle about the local vertical axis of the vehicle; determining, while the vehicle is moving and via processing by the processor of the output provided by the steering angle sensor, a steering angle of the vehicle; determining, via processing by the processor of image data captured by the camera, lane markers on a road being traveled by the vehicle; determining, while the vehicle is moving forward and responsive at least in part to the determined angular rotational velocity and the determined steering angle of the vehicle, a yaw rate offset of the yaw rate sensor; determining, while the vehicle is moving forward and via processing by the processor of the output provided by the longitudinal accelerometer, a longitudinal acceleration of the vehicle; determining, via the control system, a corrected yaw rate responsive to (i) the determined yaw rate offset of the yaw rate sensor, (ii) the determined longitudinal acceleration of the vehicle and (iii) the determined lane markers on the road being traveled by the vehicle; determining, via the control system, a projected driving path of the vehicle based at least in part on the determined corrected yaw rate; detecting, at least in part via processing by the processor of image data captured by the camera, an object present in the field of view of the camera; determining, at least in part responsive to detecting the object and to the projected driving path, a hazard condition ahead of the vehicle in the projected driving path; and automatically applying the brakes of the vehicle responsive to the determined hazard condition. - View Dependent Claims (16, 17)
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18. A method for vehicular control, said method comprising:
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providing a forward viewing camera at a vehicle so as to have a field of view forward of the vehicle; providing a yaw rate sensor at the vehicle, the yaw rate sensor operable to sense angular rotational velocity of the vehicle about a local vertical axis of the vehicle; providing a longitudinal accelerometer at the vehicle, the longitudinal accelerometer operable to sense a forward or reverse acceleration of the vehicle; providing a speed sensor at the vehicle, the speed sensor operable to sense speed of the vehicle; providing a control system at the vehicle, the control system comprising a processor operable to process outputs received from the yaw rate sensor, the longitudinal accelerometer and the speed sensor; sensing, via the yaw rate sensor, angular rotational velocity while the vehicle is moving, and providing an output of the yaw rate sensor to the control system; sensing, via the longitudinal accelerometer, forward or reverse acceleration while the vehicle is moving, and providing an output of the longitudinal accelerometer to the control system; sensing, via the speed sensor, speed of the vehicle while the vehicle is moving, and providing an output of the speed sensor to the control system; determining, while the vehicle is moving forward and responsive to the output provided by the speed sensor, a speed of the vehicle; determining, while the vehicle is moving forward and via processing by the processor of the output provided by the yaw rate sensor, an angular rotational velocity of the vehicle about the local vertical axis of the vehicle; determining, while the vehicle is moving forward and responsive at least in part to the determined angular rotational velocity, a yaw rate offset of the yaw rate sensor; wherein, if the vehicle is determined to be moving at a determined speed that is above an upper threshold speed, the yaw rate offset is determined based at least in part on the determined speed; wherein, if the vehicle is determined to be moving at a determined speed that is below a lower threshold speed, the yaw rate offset is not changed from a previously determined yaw rate offset as the vehicle is moved along a path of travel; determining, while the vehicle is moving forward and via processing by the processor of the output provided by the longitudinal accelerometer, a longitudinal acceleration of the vehicle; determining, via the control system, a corrected yaw rate responsive to the determined yaw rate offset of the yaw rate sensor and the determined longitudinal acceleration of the vehicle; determining, via the control system, a projected driving path of the vehicle based at least in part on the determined corrected yaw rate; detecting, at least in part via processing by the processor of image data captured by the camera, an object present in the field of view of the camera; determining, at least in part responsive to detecting the object and to the projected driving path, a hazard condition ahead of the vehicle in the projected driving path; and automatically applying the brakes of the vehicle responsive to the determined hazard condition. - View Dependent Claims (19, 20)
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Specification