MASTER-SLAVE CONTROLLED LIGHTING SYSTEM WITH HUMAN BODY SENSOR AND ON/OFF CONTROL METHOD FOR THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a master-slave controlled lighting system with a human body sensor and a method for it that allow, when one of two master lighting devices with the human body sensor installed at two locations above a passage is turned on or off, all lighting devices including one or more slave lighting devices installed between the two master lighting devices at opposed ends to be turned on or off at the same time, respectively.SOLUTION: A first master lighting device with a human body sensor and current sensing unit and a second master lighting device having the same specifications as the first device are installed at two locations above a passage, and between these two locations one or more slave lighting devices having a current sensing unit but no human body sensor are installed. All the installed lighting devices are connected to AC power supply in parallel, and the current sensing unit of one of the master lighting devices is connected to the current sensing units of the slave lighting devices in series. The one or more slave lighting devices are on/off controlled in response to on/off information obtained from the master lighting devices at the two locations. Thus, when one of the master lighting devices at the two locations is turned on or off by sensing a human body, all the lighting devices are turned on or off, respectively, at the same time.