Method for judging vehicle collision

摘要

A method for judging vehicle collision in which an output signal from an acceleration sensor carried on a vehicle, which is obtained from a time of start of judgment on collision, is outputted through interval windows each having a predetermined time width of a plurality of sampling cycles and provided as those successively delayed by one sampling cycle respectively. A waveform of the output signal is Hadamard-transformed and decomposed into frequency components for each of the interval windows by using an Hadamard-transforming unit. A threshold value set for a predetermined frequency component and outputted from a threshold-outputting unit is compared with a level value of the predetermined frequency component selected from the frequency components obtained by the decomposition in the Hadamard-transforming unit, by using a collision-judging unit. Occurrence of collision of the vehicle is judged on the basis of a result of the comparison.