Compass aided direction finding for first responders

摘要

A direction finding system used with an exit having a transmitter at that exit sending a location beam having a direction with respect to a compass direction. A receiver is carried by a person seeking directional guidance to the exit. The receiver receives the beam and determines the direction of the beam with respect to the compass direction. A display indicates the direction in which the person should move to reach the exit. Either the transmitter or the receiver or both may use an antenna array for sending and/or receiving a plurality of signals, each having a specific direction with respect to the compass direction. In a preferred embodiment, the receiver corrects for differences between the sent direction and the actual direction received.