WIRELESS CONTROL SYSTEM FOR AIRPORT LIGHTING
BERNARD ELECTRONICS CO WASHINGTON DC
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An experimental system for wireless control and monitoring of airport lighting was developed with the objective of providing a cheaper more flexible and reliable system than existing cable systems. The system provides 16 channel capacity on a single FM carrier with a maximum range of 3 miles. Three channels selectable provide on-off, 5-step of continuous control in the form of 0-10 volt dc commands. Remote stations reply automatically with identical signals to actuate displays at the master station. Electrical comparison of signals indicate incorrect reply or failure in any channel. Failsafe provisions at each remote station switch the lighting equipment to full on, full off, or the last commanded brightness in the event of system failure. High spectrum efficiency, and maximum rejection of noise, cross-talk, and interference is achieved through the use of a previously developed multiplex technique. Orthogonal pulse waveforms are employed as subcarrier signals, which are generated digitally and amplitude-modulated by diode multipliers.
- Terminal Flight Facilities
- Air Conditioning, Heating, Lighting and Ventilating