Patent ID: 6061616
Filing Date: 2000-05-09
Classification: B60R

Abstract:
An activation decision apparatus for determining whether passive restraints mounted on a vehicle are to be activated, said activation decision apparatus comprising:measurement means for measuring an impact applied in a specified direction of said vehicle and outputting a detection signal, which has a reference level set at an observed level when no impact is applied to said vehicle;waveform deforming means for deforming a waveform of the detection signal and generating waveform-deformed signals, wherein said waveform deforming means comprises:means for setting a specific level that is higher than the reference level of the detection signal but lower than a maximum level of the detection signal and multiplying waveform segments of the detection signal that are not lower than the specific level by a coefficient `m`, where 0<m<1, thereby deforming the waveform of the detection signal;integration means for integrating the waveform-deformed signals to obtain an integral value; andactivation determination means for comparing the integral value obtained by said integration means with a preset threshold value and determining whether said passive restraints are to be activated, based on a result of the comparison,wherein said waveform deforming means deforms the waveform of the detection signal, at least such that an absolute value of an integral obtained by integrating waveform segments of the waveform-deformed signal that are not lower than the reference level becomes smaller than an absolute value of an integral obtained by integrating waveform segments of the detection signal that are not lower than the reference level.