Optical communication device for elevator

Abstract

The present invention relates to an apparatus for optical communication for an elevator, the apparatus reducing the optical communication distance to the shortest distance and comprising: a data transmitter (10) installed on the wall or ceiling of the hall in front of an elevator shaft; a data receiver (30) installed behind a hall button cover (20) of a building elevator and connected wirelessly to the data transmitter (10) to receive digital data therefrom; an antenna (32) built into the hall button cover (20) and connected to the a data receiver (30); an optical communication transmitter (40), connected by wire to the a data receiver (30) and installed on the wall of the elevator shaft (P), for converting digital data to optical data and transmitting the latter; an optical communication receiver (50), installed in the elevator (E) at a location facing the optical communication transmitter (40) when the elevator (E) is stopped to allow passengers to get in and out, for receiving data the optical communication transmitter (40) by means of wireless optical communication; a controller (C), connected by wire to the optical communication receiver (50) and a control room and installed in the ceiling of the elevator (E), for receiving data from the optical communication receiver (50) to convert into image data, and being controlled by the control room; and a monitor (M), connected by wire to the controller (C) and installed on the door, wall or ceiling of the elevator (E), for receiving and displaying image data from the controller.

Description

technical field [0001] The present invention relates to an optical communication device for elevators, and more specifically, to an optical communication device for elevators which shortens the optical communication distance to the shortest distance. Background technique [0002] As there are more and more examples of installing displays for displaying information on ceilings, such as doors and walls, inside elevators, optical communication has also been selected to transmit data to the displays from the outside. [0003] figure 1 It is a cross-sectional view of an elevator shaft showing this optical communication method. For optical communication, generally, the optical communication transmitter 140 is provided on the bottom surface of the elevator shaft, and the optical communication receiver 150 is provided on the bottom surface of the elevator E with respect to the optical communication transmitter. In this case, when the elevator E reaches the lowest point as shown in...

AI Technical Summary

Problems solved by technology

In particular, the elevator shaft moves very frequently due to the lifting and lowering of the elevator, and there are a lot of foreign matter such as dust, and the surface of the transmitter is covered with foreign matter to a great extent.

In this case, optical communication is interfered and data transmission cannot be performed correctly

[0005] And, as shown in the figure, it is necessary to connect the controller C and the optical communication transmitter 140 by a wired cable. The controller C includes a computer located in a machine room at the upper end of the elevator shaft, so the length of the wired cable is very long. There will be some problems in terms of maintenance management and costs

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