The utility model discloses an extensible double-ring
information system, which comprises a first link, a second link and a
server, the first link comprises a first monitor, the second link comprises a second monitor, the
tail end of the first monitor in the first link is provided with a plurality of first monitors, and the
tail end of the second monitor is provided with a plurality of second monitors. A plurality of second monitors are arranged at the
tail ends of the second monitors in the second link, the first link and the second link form a double-ring
layout, a setting and reporting mechanism of the
wireless local area devices is provided, and the problems of
high complexity and high cost during arrangement and repair of wired devices are solved. The
wireless device does not need cables such as optical fibers or
copper wires as
signal transmission media, and only needs power lines. Since most devices are internally provided with power supply allocation circuits, the reasonable
power supply voltage drop or
voltage fluctuation of the power line still belongs to an acceptable range, and the
adaptation of the
wireless device is greatly improved.