Apparatus for failure identification for use in vehicle occupant

Details Apparatus for failure identification for use in vehicle occupant Apparatus for failure identification for use in vehicle occupant

1992-03-11

1993-12-07

Myracle, Jerry W.

Electricity: measuring and testing

Fault detecting in electric circuits and of electric components

In an ignitor or detonator

738659, G01M 1900

Patent

active

052686434

ABSTRACT:
An apparatus for failure identification suitable for determining between existence and nonexistence of failure of the squib in occupant protecting system. The first terminal voltage generated between both the terminals of the squib when the first monitor current is passed through the squib, and the second terminal voltage generated between both the terminals of the squib when the second monitor current is passed through the squib. The first and second terminal voltages are amplified by the differential amplifier circuit into the first and second differentially amplified voltage. Thereafter, the difference between the first differentially amplified voltage and the second differentially amplified voltage is calculated to obtain the monitor voltage difference and it is compared with the reference voltage, and thereupon, decision between existence and nonexistence of a short-circuit in the squib is made.

REFERENCES:
patent: 3911391 (1975-10-01), Held et al.
patent: 4893109 (1990-01-01), Vrabel et al.
patent: 4968965 (1990-11-01), Naitou et al.
patent: 5081442 (1992-01-01), Ito et al.
patent: 5187465 (1993-02-01), Stonerook et al.

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