METHOD AND DEVICE FOR STARTING AND CONTROLLING OCCUPANT PROTECTION DEVICE AS WELL AS RECORDING MEDIUM IN WHICH STARTING AND CONTROL PROGRAM FOR OCCUPANT PROTECTION DEVICE IS RECORDED

摘要

PROBLEM TO BE SOLVED: To provide a method for starting and controlling an air bag device capable of discriminating so-called soft crash from low-speed collision. SOLUTION: When a preset or more deceleration is detected (S104), a speed integration value ΔV as a time integration of the deceleration is calculated (S110) and a segment length in a preset range about the change property curve of the speed integration value ΔV is calculated (S112, 114). When the segment length is judged to be smaller than a preset value 12 , low-speed collision occurs instead of so-called soft crash, when the speed integration value ΔV exceeds a preset threshold value VTH, an air bag is developed, when the segment length is judged to be not less than 12 (S116), the speed integration value ΔV is incremented by a preset value α (S118), and when it is judged to exceed the threshold value VTH (S112), so-called soft crash occurs to develop the air bag.