AIRPORT EQUIPMENT MONITOR AND CONTROL SYSTEM

摘要

PROBLEM TO BE SOLVED: To stably transmit the control signal of a master station and the state signal of the monitoring equipment of many terminals free of influence from a noise. SOLUTION: The airport equipment monitor and control system is composed by connecting each terminal 8 monitoring target equipment L and C individually through the master station 7 and each rubber transformer 9 in series on a power line 5 drawn from a power source generating device 4. While the master station and each terminal prepare a control command to each terminal, and the supervisory signal of the target equipment as text data, and sends and receives FSK-modulated text data synchronized with the full wave or half wave of the power source waveform of the power line and whose period not transmitting data are masked only during a suitable data transmission period.