Wireless communication based safer street lamp control system

• US 20080143493A1
• Filed: 08/29/2007
• Published: 06/19/2008
• Est. Priority Date: 12/19/2006
• Status: Active Grant

• Current Assignee: Korea Electrotechnology Research Institute
• Original Assignee: Korea Electrotechnology Research Institute
• Inventors: Jeong, Seong-Hwan, Nam, Kee-Young, Lee, Jae-Duck
• Granted Patent: US 7,791,492 B2
• Time in Patent Office: Days
• US Class Current: 340/310.11
• CPC Class Codes: H05B 47/19 via wireless transmission
• CPC Class Codes: H05B 47/235 with communication between the lamps and a central unit

Abstract

Disclosed is a street lamp control system, which cuts off power sources only around an abnormal street lamp where an electric leakage or dangerous situation occurs and allows the rest street lamps to be kept being turned on. The street lamp control system is positioned in a region divided by a plurality of areas where a predetermined number of street lamps are installed. A distribution panel is installed in each center of the areas, and includes two power source control switching circuits for controlling right and left power sources of the corresponding areas. The power source control switching circuit of the corresponding distribution panel turns off the right and left street lamps including the corresponding street lamp when an abnormal state is sensed on a specific street lamp of a specific area, and a power is supplied to the right and left street lamps to be turned on excluding the abnormal street lamp.

Claims

1. A street lamp control system in a region divided by a plurality of areas where a predetermined number of street lamps are installed, comprising:

a distribution panel installed in each center of the areas, and including two power source control switching circuits for controlling right and left power sources of the corresponding areas,

wherein the power source control switching circuit of the corresponding distribution panel turns off the right and left street lamps including the corresponding street lamp when an abnormal state is sensed on a specific street lamp of a specific area, and a power is supplied to the right and left street lamps to be turned on excluding the abnormal street lamp.

2. The street lamp control system as set forth in claim 1, wherein the distribution panel senses an abnormal state of the street lamp and transmits the sensed result to a control center in a remote way to turn off the power source of the corresponding street lamp.

3. The street lamp control system as set forth in claim 2, wherein the abnormal state of the street lamp is sensed by a current or voltage sensor.

4. A street lamp control system for remote-controlling street lamps using low power radio communication, comprising:

a street lamp light controller installed in street lamp pole, and exchanging information with a local controller and simultaneously controlling the respective street lamp in accordance with a individual control command and a group control command from the local controller;

the local controller exchanging information and a control signal with the street lamp light controllers installed in the street lamp poles to control individual and group control of the street lamps; and

a central control center for controlling the local controller to enable the street lamps to be controlled in group and individual ways,

wherein the local controller and the street lamp light controller are connected in a low power radio communication protocol, Zigbee, and the local controller and the central control center are connected via a bidirectional radio communication network.

5. The street lamp control system as set forth in claim 4, wherein the street lamp light controller comprises:

a microprocessor processing general functions including information transmission, information storage, and state display;

a radio communication unit/Zigbee module for receiving a control command from the local controller;

a current and voltage sensor for sensing an abnormal state of the street lamp;

an analog/digital converter for converting an analog signal of the street lamp sensed by the current and voltage sensor into a digital signal, and outputting the digital signal to the microprocessor;

a constant voltage supply unit for supplying a power; and

a relay driving circuit for driving the relay of the distribution panel to cut off a power of the corresponding street lamp in accordance with the received control command.

6. The street lamp control system as set forth in claim 4, wherein the local controller comprises:

a microprocessor processing general functions including information transmission, information storage, and state display;

a radio communication unit/Zigbee module communicating with the street lamp light controller;

a radio communication unit for exchanging information with a control computer of the central control center;

a display device for displaying various measurements and communication states;

a state display light emitting diode for displaying an operating state of the local controller;

an external interface unit performing maintenance and data update of the local controller; and

a constant voltage supply unit for supplying a power.