Patent ID: 7385515
Filing Date: 2008-06-10
Classification: G08B

Abstract:
1. A system for detecting that an individual is under surveillance, comprising: a. at least one sensor device that detects data that comprises at least one uniquely identifying characteristics associated with a vehicle or a person in proximity to said individual and outputs data representative thereof; b. a positioning receiver device that receives signals from several sources and from which signals it computes a position of said individual and outputs data representative thereof and of times where said at least one uniquely identifying characteristics is detected; and c. a control processor coupled to said at least one sensor device and said positioning receive device that stores data output by said at least one sensor device for vehicles or persons in proximity to said individual as said individual moves about a geographic region together with data output by said positioning receiver device that indicates positions in said geographic region where said sensor device detects uniquely identifying characteristics for vehicles or persons in vehicles as said individual moves about said geographic region, and wherein said control processor analyzes the stored data to determine whether said individual is under surveillance based on at least two detections of the same uniquely identifying characteristics sufficiently separated by time, distance and direction as said individual moves about said geographic region.