| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a plant equipment remote monitor system capable of securely monitoring operation states of various equipments in a center monitor room while greatly reducing the construction costs needed to structure the system. <P>SOLUTION: This monitor system is equipped with a wireless sensor 1 which transmits a measurement signal indicating the operation state of plant equipment by short-distance wireless, a field repeating device 2 which receives the measurement signal from the wireless sensor 1, superposes it on an alternating current flowing through a power cable 5, and transmitting the signal, a PLC transmitting key station 3 which collects measurement signals from field repeating devices 2 and transmit them through a LAN 6, and a center device 4 which receives measurement signals from the PLC transmitting key station 3 and performs data processing for storage, display, etc. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
