| 摘要 |
PCT No. PCT/JP94/02292 Sec. 371 Date Aug. 28, 1995 Sec. 102(e) Date Aug. 28, 1995 PCT Filed Dec. 28, 1994 PCT Pub. No. WO95/18433 PCT Pub. Date Jul. 6, 1995A 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.
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