Method of and a system for surveillance of an environment utilising electromagnetic waves

John Erik Aasted Sørensen (Opfinder)

Publikation: Patent

Abstrakt

A system and method for surveillance of a physical environment. May utilise already installed equipment, such as WLAN for surveillance purposes. This makes the system cost effective to implement. Transmits a first and a second signal. The signals are received by receivers, and the received signals are compared in order to detect a difference in the signals, the difference being caused by a physical change present in the signal path between transmitter(s) and receiver(s). Does not require high spectral purity of the transmitted signals or heavy computations in order to establish that a change has occurred. Suitable for intruder alarm purposes.
OriginalsprogEngelsk
IPCG01V3/12; G08B13/24; G08B25/08; (IPC1-7): G08B13/00
Land/OmrådeUSA
Prioritetsdato25/06/2003
PrioritetsnummerUS20030602921 20030625
StatusUdgivet - 29 apr. 2004
Udgivet eksterntJa

Fingeraftryk

Dyk ned i forskningsemnerne om 'Method of and a system for surveillance of an environment utilising electromagnetic waves'. Sammen danner de et unikt fingeraftryk.

Citationsformater