| 摘要 |
<p>PROBLEM TO BE SOLVED: To stably transmit the control signal of a master station and the state signal of monitor facilities of many terminals without being affected by noise. SOLUTION: The power-line carrying airport facility supervisory control system is constituted by connecting respective terminals 8 which monitor object facilities L and C individually to a power line 5, led out of a power source generating device 4, in series through the master station 7 and a rubber transformer 9 respectively, and the master station and respective terminals generate control commands to the respective terminals and monitor signals for the object facilities as text data and also inject the text data to the power line by FSK modulation based on the zero-crossing detection of the power source waveform of the power line.</p> |
