System and method for alerting and tracking with improved confidentiality

摘要

An alarm system comprising at least one first signal source (110a -110j) communicating with a central unit (100) configured for providing a logically true alerting signal (120) when predetermined conditions are met. The signal sources 110 may include transponders, such as RFID chips, for example, and a confidential list containing the relation between an RFID chip and the name of the person identified may be stored in a computer 160. A verification unit (200) is connected to independent signal sources (210a - 210j) and is configured for providing a logically true verification signal (220) when predetermined conditions are met. The signal sources (210) may also comprise means for measuring bio-functions, e.g. heart rate, respiration, or eye movements, and the verification unit (200) may be carried by a safety manager. In such a case, the safety manager will also be able to confirm or reject an alerting alarm from the central unit (100) manually. An alarm signal (320) is activated if and only if the alerting signal (120) is true and the verification signal (220) is true. The alarm signal may be a call to a receiver (400) at a rescue or security centre.