Sensing system for actuating a safety device

摘要

An acceleration sensing and safety-device actuating system, for actuating a safety device, such as a crash-sensitive automobile air bag detonator. A differential amplifier forms part of an operational integrator responsive to an acceleration sensor and a reference potential. A threshold device, responsive to proper operation of the reference potential, triggers an output stage to set off the safety device when the differential amplifier output indicates a given deceleration. An isolating circuit isolates the output stage for a given time after starting the automobile. A control switch shorts the operating voltage in response to low operating potential or an inoperative safety circuit, and turns on a warning indicator.