Data processing: vehicles – navigation – and relative location – Vehicle control – guidance – operation – or indication – Vehicle subsystem or accessory control
Patent
1997-03-04
2000-05-09
Nguyen, Tan
Data processing: vehicles, navigation, and relative location
Vehicle control, guidance, operation, or indication
Vehicle subsystem or accessory control
180282, 180268, 280735, B60R 2132
Patent
active
060616164
ABSTRACT:
A waveform deforming element (315) of an arithmetic operations unit (314) divides the waveform of an input acceleration signal by a first level R1 higher than the level `0` and a second level R2 lower than the level `0`. A first coefficient multiplier element (316) in the waveform deforming element (315) multiplies the waveform segments of not lower than the first level R1 by a predetermined coefficient `m` of not less than 0 and not greater than 1 (0.ltoreq.m.ltoreq.1), whereas a second coefficient multiplier element (317) in the waveform deforming element (315) multiplies the waveform segments of not higher than the second level R2 by a predetermined coefficient `n` of not less than 1 (1.ltoreq.n). This procedure deforms the waveform of the observed acceleration signal. An integration element (318) of the arithmetic operations unit (314) then integrates the acceleration signal having the deformed waveform with respect to time, so as to obtain an integral value of the acceleration signal. This structure ensures an appropriate determination of activation or inactivation of passive restraints even in case of an underside hit.
REFERENCES:
patent: 5515276 (1996-05-01), Kura et al.
patent: 5594647 (1997-01-01), Yasuda et al.
patent: 5609358 (1997-03-01), Iyoda et al.
patent: 5712784 (1998-01-01), Fendt et al.
patent: 5787377 (1998-07-01), Watanabe et al.
Inayoshi Tatsuhiro
Ohno Yoshikazu
Hernandez Olga
Nguyen Tan
Toyota Jidosha & Kabushiki Kaisha
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