Fault detector for vehicle safety system

Details Fault detector for vehicle safety system Fault detector for vehicle safety system

1989-09-22

1990-09-11

Orsino, Joseph A.

Communications: electrical

Land vehicle alarms or indicators

Of collision or contact with external object

280735, B60Q 100

Patent

active

049566318

ABSTRACT:
An improved fault detector for a vehicle air bag safety system including a balanced wheatstone bridge having a squib resistor at one arm thereof and a G sensor at another arm thereof. Wherein, outputs of the wheatstone bridge are fed alternatively to a single DC amplifier circuit by utilizing switching circuits and a voltage difference of the alternative outputs derived from the DC amplifier circuit is measured for detecting any transition or a fault of the squib resistor without any influence of the input offset voltage for the DC amplifier circuit and of dispersions in circuit constant as well as components of a measuring system, thereby eliminating the precise adjustments which are required in the prior art system during the production stage for providing an inexpensive and highly reliable fault detector.

REFERENCES:
patent: 3745523 (1973-07-01), Lewis et al.
patent: 3767002 (1973-10-01), Gillund
patent: 3803569 (1974-04-01), Iwasaki et al.
patent: 4287431 (1981-09-01), Yasui et al.
patent: 4359715 (1982-11-01), Langer et al.
patent: 4673912 (1987-06-01), Kumasaka et al.

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