Vehicle Collision Avoidance System and Method
First Claim
1. A vehicle collision avoidance method comprising the steps of:
- broadcasting vehicle information packages from a host vehicle to a neighboring vehicle and receiving external vehicle information packages sent from the neighboring vehicle, each of the vehicle information packages comprising coordinates, a driving speed and a driving direction of the corresponded vehicle;
mapping coordinates of the host vehicle and the neighboring vehicle from world geodetic system to local navigation system (NED coordinate);
categorizing collision zones by using the heading angles and the coordinates of the host vehicle and the neighboring vehicle to estimate a possible collision position, a distance from the host vehicle to the possible collision position, and a distance from the neighboring vehicle to the possible collision position;
determining whether the possible collision position exists using two conditions, whereinthe first condition is to check whether a pointing direction of a first position vector defined from the host vehicle to the possible position is the same as the driving direction of the host vehicle;
the second condition is to check whether a pointing direction of a second position vector defined from the neighboring to the possible collision position is the same as the driving direction of the neighboring vehicle; and
the existence of the possible collision position is confirmed when the two point directions are the same as the driving directions of the host vehicle and the neighboring vehicle respectively;
calculating a collision time by using the driving speeds, the distance between the host vehicle to the possible collision position, and the distance between the neighboring vehicle to the possible collision position to calculate at least one collision time; and
outputting warning messages containing the at least one collision time and the possible collision position.
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Accused Products
Abstract
A vehicle collision avoidance system is implemented in a host vehicle. A wireless communication module in the host vehicles wirelessly broadcasts vehicle information packages of the host vehicle and receives external vehicle information packages from other neighboring vehicles. Based on the received vehicle information packages, a collision avoidance process is performed. The process has steps of mapping coordinates system, categorizing collision zones, determining whether a possible collision position exists, calculating a collision time and outputting warning messages. The estimations of the possible collision position and the collision time are not affected by the positions of the neighboring vehicles. Therefore, the neighboring vehicles approaching the host vehicle from different direction are effectively monitored.
20 Citations
16 Claims
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1. A vehicle collision avoidance method comprising the steps of:
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broadcasting vehicle information packages from a host vehicle to a neighboring vehicle and receiving external vehicle information packages sent from the neighboring vehicle, each of the vehicle information packages comprising coordinates, a driving speed and a driving direction of the corresponded vehicle; mapping coordinates of the host vehicle and the neighboring vehicle from world geodetic system to local navigation system (NED coordinate); categorizing collision zones by using the heading angles and the coordinates of the host vehicle and the neighboring vehicle to estimate a possible collision position, a distance from the host vehicle to the possible collision position, and a distance from the neighboring vehicle to the possible collision position; determining whether the possible collision position exists using two conditions, wherein the first condition is to check whether a pointing direction of a first position vector defined from the host vehicle to the possible position is the same as the driving direction of the host vehicle; the second condition is to check whether a pointing direction of a second position vector defined from the neighboring to the possible collision position is the same as the driving direction of the neighboring vehicle; and the existence of the possible collision position is confirmed when the two point directions are the same as the driving directions of the host vehicle and the neighboring vehicle respectively; calculating a collision time by using the driving speeds, the distance between the host vehicle to the possible collision position, and the distance between the neighboring vehicle to the possible collision position to calculate at least one collision time; and outputting warning messages containing the at least one collision time and the possible collision position. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A vehicle collision avoidance system comprising:
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a position module for providing position data of a host vehicle; a processing unit receiving the position data, computing a driving speed and a driving direction of the host vehicle, producing vehicle information packages including the driving speed and the driving direction, storing a collision avoidance process having steps of mapping coordinates system, categorizing collision zones, determining whether a possible collision position exists, calculating a collision time and outputting warning messages; a wireless communication module connected to the processing unit, broadcasting the vehicle information packages produced by the processing unit, receiving external vehicle information packages sent from a neighboring vehicle, and transmitting the received external vehicle information packages to the processing unit for data computation; a warning unit connected to and driven by the processing unit to produce warning messages for noticing a vehicle driver. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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Specification