| 摘要 |
PURPOSE:To simplify the system constitution and to reduce the cost by incorporating a humidity measuring circuit to a humidity supervisory terminal equipment, rectifying and smoothing a transmission signal sent from a central supervisory equipment and providing a power supply circuit forming the power supply for the terminal equipment circuit and the humidity measuring circuit into the humidity supervisory terminal equipment. CONSTITUTION:A central supervisory equipment 1 accesses each humidity supervisory terminal equipment 3 sequentially and sends a transmission signal Vs to return the measured humidity data by the humidity measuring circuit 2 and the measured data is returned during the return period set by the transmission signal Vs from the humidity supervisory terminal device 3. In the humidity centralized supervisory equipment as above, the humidity measuring circuit 3 is built in the humidity supervisory terminal equipment 2 and the power supply circuit 6 giving a power to the terminal equipment circuit and the humidity measuring circuit 3 is provided in the humidity supervisory terminal equipment 2 while rectifying and smoothing the transmission signal Vs sent from the central supervisory equipment 1. Thus, it is not required to prepare a separate power supply to energize the circuit 2, then the system constitution is simplified.
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