Patent ID: 7834771

Claim:
A system for detecting a fire, the system including a fire detection device and a control center terminal, wherein the fire detection device comprises: a Laser Range Finder (LRF) for calculating a distance to a location of breakout of a fire using a laser when the fire has broken out; an infrared camera for capturing an infrared image and transmitting the infrared image to a control unit; a Charge Coupled Device (CCD) camera for capturing a CCD image and transmitting the CCD image to the control unit; the control unit for analyzing the infrared image received from the infrared camera, determining whether a fire has broken out, performing processing such that the CCD camera captures an area on fire if it is determined that the fire has broken out, determining the location of breakout of the fire using coordinates of an installation location of the infrared camera, the distance received from the LRF, and a capturing angle received from the infrared camera, performing processing such that the image captured by the infrared camera or the CCD camera is output to the control center terminal, and controlling a function of a warning unit; and the warning unit for outputting a warning sound or a warning message under control of the control unit when the fire has broken out, and wherein the control unit performs processing such that, when an area having a temperature equal to or greater than a reference temperature is present in the captured image received from the infrared camera, the control unit determines the area to be an area on fire, generates a contour of the area on fire by extracting a contour of an image of the area on fire, determines an area of the contour to be a flame when the contour continuously varies for a preset period of time or longer, obtains information about a size of the flame and a spreading speed of the flame, enables the obtained information to be output to the control center terminal, and allows information about breakout of the fire, the location of breakout of the fire, the size of the flame, and the spreading speed of the flame to be provided to a pre-designated disaster prevention center when the fire has broken out.