Safety driving system
First Claim
1. A safety driving system comprising:
- an operation detecting section including accumulating means accumulating at each first predetermined cycle a constant during the operation of a vehicle and deriving monotonousness and subtracting means for subtracting a weight assigned to an operated device, except for a steering wheel, from a sum of accumulated constants and updating the monotonousness;
a steering detecting section detecting an amount of steering operation within a preset period of time;
a running position detecting section including;
an image data memory selectively receiving and storing images of a road surface in front of a vehicle which are photographed at each second predetermined cycle by a camera supported on a vehicle body;
image processing means extracting data on white lines of the road surface and determining coordinates of white lines defining a lane;
a zigzag amount calculating section receiving coordinate data of the white lines and calculating a zigzag amount which denotes a deviation of the white lines on horizontal coordinates at each second predetermined cycle; and
zigzag amount averaging section averaging the zigzag amount data calculated at a predetermined number of times;
a fuzzy inference section inferring a driver'"'"'s alertness on the basis of membership functions respectively corresponding to the updated monotonousness, the amount of steering operation, and the average zigzag amount; and
an alerting section activating wake-up members depending upon the driver'"'"'s alertness.
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Accused Products
Abstract
A safety driving system detects a driver'"'"'s alertness, thereby emitting an alarm depending on the detected alertness. The safety driving system comprises an operation detecting section A, which updates monotonousness T each time one of the driver-operated device is operated, and subtracts a weight ni, assigned to the operated device, from a value denoting the monotonousness, a steering detecting section (C) for deriving a steering amount (e.g. SQ), a running position detecting section (A) for detecting a zigzag amount (Rn) denoting a deviation of white lines detected based on an image of a road surface, a fuzzy inference section D inferring driver'"'"'s alertness using membership functions of the sections (A), (B) and (C), and an alerting section F for emitting an alarm in accordance with the detected driver'"'"'s alertness. The zigzag amount (Rn) may be determined on the basis of images which are taken by a camera 2 and which indicate white lines on the road surface so as to reliably determine the driver'"'"'s alertness.
89 Citations
8 Claims
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1. A safety driving system comprising:
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an operation detecting section including accumulating means accumulating at each first predetermined cycle a constant during the operation of a vehicle and deriving monotonousness and subtracting means for subtracting a weight assigned to an operated device, except for a steering wheel, from a sum of accumulated constants and updating the monotonousness; a steering detecting section detecting an amount of steering operation within a preset period of time; a running position detecting section including;
an image data memory selectively receiving and storing images of a road surface in front of a vehicle which are photographed at each second predetermined cycle by a camera supported on a vehicle body;
image processing means extracting data on white lines of the road surface and determining coordinates of white lines defining a lane;
a zigzag amount calculating section receiving coordinate data of the white lines and calculating a zigzag amount which denotes a deviation of the white lines on horizontal coordinates at each second predetermined cycle; and
zigzag amount averaging section averaging the zigzag amount data calculated at a predetermined number of times;a fuzzy inference section inferring a driver'"'"'s alertness on the basis of membership functions respectively corresponding to the updated monotonousness, the amount of steering operation, and the average zigzag amount; and an alerting section activating wake-up members depending upon the driver'"'"'s alertness. - View Dependent Claims (2, 3, 4, 5, 7)
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6. The safety driving system comprising:
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an operation detecting section including accumulating means for accumulating at each of a predetermined cycle a constant during the operation of a vehicle and deriving monotonousness and subtracting means subtracting a weight assigned to an operated device, except for a steering wheel, from a sum of accumulated constants and updating the monotonousness; a steering operation detecting section detecting an amount of steering operation within a preset period of time; a fuzzy inference section inferring a driver'"'"'s alertness on the basis of membership functions respectively corresponding to the updated monotonousness and the amount of steering operation; and an alerting section activating wake-up members depending upon the driver'"'"'s alertness. - View Dependent Claims (8)
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Specification