Identification system using a portable instrument issuing an external electromagnetic signal

摘要

A system and method are set forth for tracking activities of a person having on their person an identification instrument which issues coded signals over a limited range. A data base is provided which includes data for the person including biometrical data such as the facial image of the person. When the card is brought into the range of a receiving antenna, the card's signal is received and processed to access the person's data including their biometrical data for recognition of the person