OPTICAL FIBER SENSOR FOR COLLISION DETECTION OF AUTOMOBILE BUMPER

摘要

PROBLEM TO BE SOLVED: To provide an optical fiber sensor for collision detection of an automobile bumper capable of properly detecting collision. SOLUTION: The optical fiber sensor 10 is constituted by arranging four POF 1-4 with scratches in a tape shape in parallel. Scratched areas 1a-4a of the respective POF 1-4 with scratches are successively deviated in a length direction and are provided with a plurality of scratched area combinations B. When a range of surface length L of a recessed part when a collision object in which it is assumed that the object is cylindrical and its radius R is within a certain range collides to generate a recess on the bumper is made to Lmin.-Lmax., length S of the scratched area is set so as to satisfy a first condition that the recessed part is not straddling over two scratched areas adjacent to one POF with scratches relative to all recessed parts in which the surface length of the recessed part is within a range of Lmin.-Lmax. and a second condition that the scratched area is at least shorter than the surface length of the recessed part. COPYRIGHT: (C)2007,JPO&INPIT