Method of and system for monitoring preceding vehicles
First Claim
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1. A preceding vehicle monitoring system for monitoring driving conditions of a preceding vehicle directly in front of a vehicle, said preceding vehicle monitoring system comprising:
- distance monitoring means for monitoring an inter-vehicle distance to a preceding vehicle at regular intervals; and
driving condition determining means for calculating a change in inter-vehicle distance between every adjacent intervals based on said inter-vehicle distances, detecting predetermined times of consecutive decreases in said change in inter-vehicle distance, detecting a total of said predetermined times of consecutive decreases and determining that said preceding vehicle is in deceleration when said total of said predetermined times of consecutive decreases is greater than a specified threshold decrease in distance.
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Abstract
A distance monitoring system of a vehicle monitors a distance to a preceding vehicle traveling directly ahead of the vehicle to determines whether the preceding vehicle is decelerating by comparing a change in the vehicle speed with a reference value which is varied according to various driving condition in relation in particular to dangers such as collisions against the preceding vehicle.
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Citations
25 Claims
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1. A preceding vehicle monitoring system for monitoring driving conditions of a preceding vehicle directly in front of a vehicle, said preceding vehicle monitoring system comprising:
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distance monitoring means for monitoring an inter-vehicle distance to a preceding vehicle at regular intervals; and driving condition determining means for calculating a change in inter-vehicle distance between every adjacent intervals based on said inter-vehicle distances, detecting predetermined times of consecutive decreases in said change in inter-vehicle distance, detecting a total of said predetermined times of consecutive decreases and determining that said preceding vehicle is in deceleration when said total of said predetermined times of consecutive decreases is greater than a specified threshold decrease in distance. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A preceding vehicle monitoring system for monitoring driving conditions of a preceding vehicle directly in front of a vehicle, said preceding vehicle monitoring system comprising:
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a distance sensor for detecting an inter-vehicle distance to a preceding vehicle at regular intervals; and a driving condition determining unit for calculating a change in inter-vehicle distance between every adjacent intervals based on said inter-vehicle distances, detecting a predetermined times of consecutive decreases in said change in inter-vehicle distance, detecting a total of said predetermined times of consecutive decreases, and determining that said preceding vehicle is in deceleration when said total of said predetermined times of consecutive decreases is greater than a specified threshold decrease in distance. - View Dependent Claims (23)
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24. A preceding vehicle monitoring system for monitoring driving conditions of a preceding vehicle directly in front of a vehicle, said preceding vehicle monitoring system comprising:
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distance monitoring means for monitoring an inter-vehicle distance to a preceding vehicle at regular intervals; and driving condition determining means for calculating a change in inter-vehicle distance between every adjacent intervals based on said inter-vehicle distances, detecting a predetermined times of consecutive decreases in said change in inter-vehicle distance, and determining that said preceding vehicle is in deceleration when said predetermined number of times of consecutive decreases are detected. - View Dependent Claims (25)
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Specification