DEGREE-OF-RISK JUDGING METHOD, PREVENTING METHOD AND DEVICE FOR TOUCHING ACCIDENT OF CAR

摘要

PURPOSE:To exactly judge whether a car touches an obstacle or not by comparing the value of a rotation radius at one point in a car during its travelling on a curved road with the value of distance when the distance between a rotation center point and the obstacle becomes minimum. CONSTITUTION:When a car 1 turns to the left, the value of a distance l between an obstacle detector 7 and the point B of an obstacle 8 is detected by the obstacle detector 7, and a distance r between a rotation center point O and the point B of the obstacle 8 is evaluated by an arithmetic operation from the distance l, the rotation radius R of a point A on the outside surface of car 1, and distances a, b shown in the drawing. And, whether or not the car 1 makes contact with the obstacle 8 or approaches to a dangerous distance during its left turning is judged by the comparing the above described values R, r, with each other. A plurality of said detector 7 are preferably provided, or when the detector 7 detects a distance l, said value is stored, allowing more correct judgemention degree-of-risk to be done by comparing R, r values with each other, during the time when the point A moves to the point A'.