| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a load light monitoring system which makes installation of new infrastructure unnecessary and acquires maintenance information by simple structure when the maintenance information is acquired from each load light, and the load light. <P>SOLUTION: A load light monitoring system for acquiring maintenance information from many load lights comprises: a control/monitoring device 2 having a voltage control part which applies predetermined voltage to a common light control line 3 for transmitting a light control signal to each load light 1; a switching part 14 with which each load light 1 is provided; an encoder 16 with which each load light 1 is provided to encode the maintenance information; and a delay time setting part 18 with which each load light 1 is provided and in which different delay time is set for every load light 1. The encoder 16 encodes the maintenance information after the set delay time in response to application of the predetermined voltage, and transmits the maintenance information to the control/monitoring device 2 by superposing the encoded maintenance information on the predetermined voltage via the switching part 14. <P>COPYRIGHT: (C)2012,JPO&INPIT |
