Collision mitigated braking for autonomous vehicles
First Claim
1. A computer-implemented method for collision mitigated braking in a vehicle operating in an autonomous mode, the method comprising:
- receiving, by one or more processors of one or more computing devices, heading and location information of one or more objects located externally to the vehicle from one or more sensors of the vehicle;
analyzing, by the one or more processors, the received heading and location information to filter selected ones of the objects that may collide with the vehicle in accordance with a predetermined false positive collision rate;
evaluating, by the one or more processors, the filtered selected objects to determine whether immediate braking is required to avoid a collision with any of the filtered selected objects;
determining that a main driving system of the vehicle for the autonomous mode has not initiated braking during the autonomous mode; and
in response to the evaluation and the determination, sending a signal from the one or more processors to a deceleration system of the vehicle to initiate immediate braking and thereby causing the deceleration system to brake;
wherein filtering the selected objects includes applying a padded polygon to different objects detected by the one or more sensors to identify whether there is a potential for collision with the different detected objects, and a size and shape of each padded polygon is based on one or more factors selected from the group consisting of;
a buffer braking distance from the front bumper of the vehicle to a respective object;
a sweep volume of the front bumper; and
the vehicle'"'"'s predicted path from a current time to a future time.
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Accused Products
Abstract
Aspects of the disclosure involve a collision mitigated braking system employed in vehicles operating in a self-driving (autonomous) mode. Collision mitigated braking provides redundancy to the vehicle'"'"'s main driving system in emergency situations. The collision mitigated braking system is configured to cause the vehicle to come to a stop when an imminent collision is perceived and the main driving system has not initiated a braking maneuver. A perception component employs information received from vehicle sensors, analyzing the sensor data to identify nearby objects of interest that are determined to be in the vehicle'"'"'s path or that could otherwise collide with the vehicle. A control component evaluates the objects of interest to determine whether immediate braking is required. If this is the case and the main driving system has not begun to brake, the control component causes the vehicle to perform immediate braking to avoid a possible collision.
37 Citations
15 Claims
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1. A computer-implemented method for collision mitigated braking in a vehicle operating in an autonomous mode, the method comprising:
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receiving, by one or more processors of one or more computing devices, heading and location information of one or more objects located externally to the vehicle from one or more sensors of the vehicle; analyzing, by the one or more processors, the received heading and location information to filter selected ones of the objects that may collide with the vehicle in accordance with a predetermined false positive collision rate; evaluating, by the one or more processors, the filtered selected objects to determine whether immediate braking is required to avoid a collision with any of the filtered selected objects; determining that a main driving system of the vehicle for the autonomous mode has not initiated braking during the autonomous mode; and in response to the evaluation and the determination, sending a signal from the one or more processors to a deceleration system of the vehicle to initiate immediate braking and thereby causing the deceleration system to brake; wherein filtering the selected objects includes applying a padded polygon to different objects detected by the one or more sensors to identify whether there is a potential for collision with the different detected objects, and a size and shape of each padded polygon is based on one or more factors selected from the group consisting of; a buffer braking distance from the front bumper of the vehicle to a respective object; a sweep volume of the front bumper; and the vehicle'"'"'s predicted path from a current time to a future time. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A vehicle control system for a vehicle, the vehicle control system comprising one or more computing devices configured to:
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receive heading and location information of one or more objects located externally to the vehicle from one or more sensors of the vehicle; analyze the received heading and location information to filter selected ones of the objects that may collide with the vehicle in accordance with a predetermined false positive collision rate; evaluate the filtered selected objects to determine whether immediate braking is required to avoid a collision with any of the filtered selected objects; and determine that a main driving system of the vehicle for the autonomous mode has not initiated braking during an autonomous driving mode; and in response to the evaluation and the determination, send a signal to initiate immediate braking of the vehicle to a deceleration system of the vehicle and thereby causing the deceleration system to brake; wherein the one or more computing devices are configured to filter the selected objects by applying a padded polygon to different objects detected by the one or more sensors to identify whether there is a potential for collision with the different detected objects, and a size and shape of each padded polygon is based on one or more factors selected from the group consisting of; a buffer braking distance from the front bumper of the vehicle to a respective object; a sweep volume of the front bumper; and the vehicle'"'"'s predicted path from a current time to a future time. - View Dependent Claims (9, 10, 11, 12)
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13. A non-transitory computer-readable medium on which instructions are stored, the instructions, when executed by one or more processors, cause the one or more processors to perform a method for collision mitigated braking in a vehicle operating in an autonomous mode, the method comprising:
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receiving heading and location information of one or more objects located externally to the vehicle from one or more sensors of the vehicle; analyzing the received heading and location information to filter selected ones of the objects that may collide with the vehicle in accordance with a predetermined false positive collision rate; evaluating the filtered selected objects to determine whether immediate braking is required to avoid a collision with any of the filtered selected objects; and determining that a main driving system of the vehicle for the autonomous mode has not initiated braking during the autonomous mode; and in response to the evaluation and the determination, sending a signal from the one or more processors to a deceleration system of the vehicle to initiate immediate braking and thereby causing the deceleration system to brake; wherein filtering the selected objects includes applying a padded polygon to different objects detected by the one or more sensors to identify whether there is a potential for collision with the different detected objects, and a size and shape of each padded polygon is based on one or more factors selected from the group consisting of; a buffer braking distance from the front bumper of the vehicle to a respective object; a sweep volume of the front bumper; and the vehicle'"'"'s predicted path from a current time to a future time. - View Dependent Claims (14, 15)
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Specification