An electronic intrusion detection system for monitoring environments having at least one electronic sensor responsive to movements occurring in the environment and adapted to modify at least one characteristic of its electrical output in response to the presence of a moving body in the environment. An...http://www.google.fr/patents/US6081193?utm_source=gb-gplus-shareBrevet US6081193 - Electronic intrusion detection system for monitored environments
Electronic intrusion detection system for monitored environments
