JUDGING METHOD FOR COLLISION OF VEHICLE AND COLLISION JUDGING DEVICE

Japanese Patent JP3289583

B2

PROBLEM TO BE SOLVED: To perform high-speed and high-precision judgment for a collision by judging the collision when the long section integral output of an acceleration signal exceeds the specified threshold value, and synthetically judging the collision through a process of adding impact force to long period and short period speed change amounts in a plastic collision in which an occupant is injured when a vehicle collides.
SOLUTION: Acceleration signals to be obtained from an acceleration sensor 22 are filtered by a bypass filter 23, input into a long section integrator 25, respectively and sequentially added and integrated in the integral section of 90ms, and collision judgment is performed by a judging circuit 30 when the signals exceed the specified reference value in a comparator 29. Moreover, the acceleration signals are short section integrated by a first short section integrator 24, low frequency components of the acceleration signals are short section integrated by a second short section integrator 37 through a low band filtering circuit 36, impact force calculated by an absolute value circuit 26 is added to the speed change amounts of the short section integral output and the long section integral output, and a collision of a vehicle is synthetically judged by the judging circuit 30. Accordingly, the collision can be judged at a high speed.

Tomomi Saito

JP31146595A

June 10, 2002

November 30, 1995

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NEC

B60R21/16; (IPC1-7): B60R21/32

JP560777A
JP5147497A
JP699787A
JP5278559A
JP5330398A
JP6211100A

Nobuo Takahashi (3 outside)

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