Patent ID: 6483432
Filing Date: 2002-11-19
Classification: B60R,G08B

Abstract:
In an improved intrusion detection system including a self-contained monitor having a motion sensor surveiling a predetermined space detecting an occurrence of an intrusion in said space, a primary power source energizing said self-contained monitor including a volatile memory circuit having an armed state and a disarmed state communicating with a nonvolatile memory circuit having a tuning code stored therein, said volatile memory circuit being switched from said disarmed state to said armed state by an arming signal being qualified by said tuning code and being switched from said armed state to said disarmed state by a sensing of an interruption of primary power thereto, the improvement comprising:said volatile memory circuit sensing only said interruption of primary power having a duration longer than a preset period of time; and a short term energy storage circuit communicating with said primary power source and said volatile memory circuit supplying secondary power thereto such that said volatile memory circuit does not sense said interruption of primary power during said preset period of time.