Road vehicle location control system - uses radio transmitters in known positions, vehicle transmitter-receivers and monitor stations to process amplitude and phase of signals

摘要

The positional control system relates to surface vehicles esp. road vehicles, and uses radio navigation transmitters which send out long wave radiation. There is also a monitoring station, which receives signals direct from the transmitters and from the individual vehicles. Each vehicle carries appts. with a memory unit to store a sequence of navigational location points which are relayed to the monitor station. Interference cards are produced which relate to time independent records of the idealised values of phase and/or amplitude of the vehicle signals from the desired location. Return signals give the actual values. These are submitted to a phase detector for fine adjustment, and also to a plausibility tester which includes a map record of the district in which the vehicle is operating. The results of the survey are returned to a visual display unit adjacent to the operating position.