Safety driving system

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.