Boots – shoes – and leggings
Patent
1991-11-19
1992-11-24
Chin, Gary
Boots, shoes, and leggings
340436, 280735, 180271, 180282, 307 101, B60R 2132
Patent
active
051668807
ABSTRACT:
A fault detection device for an automotive passenger protection device includes a pair of parallel-connected squibs 4a and 4b coupled across a DC power source 1 and acceleration is sensors 3 and 5 coupled in series therewith. A diode 10 coupled across the higher voltage terminals of the two squibs, and field effect transistors 30 and 31, inserted between the non-inverting input terminal of the differential amplifier 7 and the measurement points A and A', are driven alternately by the judgment circuit 8. A resistor 20 balances the voltages at the measurement points A and A' when the normally open contacts 3b and 5b are open. When the normally open contacts 3b and 5b are open, the voltages at measurement points A and A' are supplied alternately to the differential amplifier 7, so that the failures of the two squibs can be detected individually.
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Chin Gary
Mitsubishi Denki & Kabushiki Kaisha
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