Patent ID: 6501502
Filing Date: 2002-12-31
Classification: G08B,H04N

Abstract:
An automatic detector for starting security cameras comprising a detection module mounted on the main body of security cameras while said detection module includes a regulator circuit, a light-sensitive circuit, a switch circuit, and a passive infrared sensor circuit, and a recorder control circuit; wherein the improvement is characterized by:said regulator circuit used for providing power for internal circuit and connected to a power source; said light-sensitive circuit connected to said regulator circuit and having a light-sensitive resistance therein by which to detect light in the environment in order to control said switch circuit; said switch circuit used for controlling a light and connected to said light-sensitive circuit; said passive infrared sensor circuit connected to said regulator circuit and said switch circuit and having a passive infrared sensor as well as a photoelectric switch circuit thereof; said photoelectric switch circuit is disposed on said main body of security cameras and said passive infrared sensor is mounted near the front end of said main body of security cameras for detecting the infrared energy emitted from human bodies to switch on said main body of security cameras; said passive infrared sensor circuit controls said switch circuit on or off to automatically switch said light connected therewith on or off. said recorder control circuit jointed with said passive infrared sensor circuit is connected to a video camera recorder; while turning on said main body of security cameras for shooting, said passive infrared sensor circuit also sends out a signal simultaneously to activate said recorder control circuit to make said video camera recorder record.