Land vehicles – Wheeled – Attachment
Patent
1992-12-23
1996-05-07
Culbreth, Eric D.
Land vehicles
Wheeled
Attachment
340436, 340438, 340514, 36442601, B60R 2132
Patent
active
055138780
ABSTRACT:
An electronic system for activating a vehicle rider protection apparatus capable of preventing the erroneous activation caused by the failure or malfunctioning of the triggering circuit in the system. An acceleration sensor produces a vehicle acceleration signal, and it is processed independently by a digital signal processor and analog signal processing circuits, which produce trigger signals S.sub.A, S.sub.B and S.sub.D on detecting a collision of the vehicle. An OR gate takes logical sum of the signals S.sub.A and S.sub.B, and produces a trigger signal S.sub.C. An AND gate takes logical product of the signals S.sub.C and S.sub.D, and produces a final trigger signal S.sub.E. In response to the final trigger signal S.sub.E, a current is supplied to a squib, which then ignites and activates the vehicle rider protection apparatus. A diagnostic circuit applies a test signal to the analog signal processing circuits, and tests the operation of the circuits by analyzing the outputs of the circuits.
REFERENCES:
patent: 4975850 (1990-12-01), Diller
patent: 5181011 (1993-01-01), Okano
patent: 5182459 (1993-01-01), Okano et al.
patent: 5286053 (1994-02-01), Lenzen et al.
Furui Takashi
Ueda Hiroyuki
Culbreth Eric D.
Mitsubishi Denki & Kabushiki Kaisha
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