KR101411624B1 - Method and system for detecting fire - Google Patents

Abstract

The present invention relates to a method and system for detecting the degree of fire using an image captured by a surveillance camera and an image captured by a thermal imaging camera.
A fire detection method according to an embodiment of the present invention includes: extracting a first image photographed from a visible light monitoring camera; Extracting a second image photographed from a thermal imaging camera; Combining the first image and the second image to generate a third image; And displaying the third image.

Description

METHOD AND SYSTEM FOR DETECTING FIRE

The present invention relates to a fire detection method and system, and more particularly, to a fire detection method and system using an image captured by a surveillance camera and an image captured by a thermal imaging camera.

Generally, in the field of petrochemical, gas, oil refinery, etc., many hazardous materials are treated as high temperature and high pressure in various processes and always have a risk of fire due to explosion.

In addition, factories having the risk of explosion as described above have a great influence on the surrounding factories and residential areas caused by the explosion in the field, and the damage caused by the explosion and damage to property are enormous.

Currently, the system to prevent explosion-caused disasters in these industrial sites is merely to check the images seen through the installation of CCTV, and to sense the heat through various sensors.

A common problem with existing detectors is malfunction, that is, not fire. This is simply a common thing and not a problem. This is because it is a serious problem that frequent firefighting users turn off the detectors altogether and cause bigger fire in case of fire.

Especially today, most of the buildings are high-rise buildings, and fire in a small space can cause enormous damage.

Therefore, it is necessary to study the fire detection technology that can minimize the installation cost while minimizing the damage before and after the fire.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a fire detection method and system capable of accurately and quickly grasping a degree of fire using an image captured by a surveillance camera and an image captured by a thermal imaging camera.

According to an aspect of the present invention, there is provided a method of monitoring a visible light, the method comprising: extracting a first image photographed from a visible light monitoring camera; Extracting a second image photographed from a thermal imaging camera having pixels lower than pixels of the visible light monitoring camera; Combining the first image and the second image to generate a third image; Extracting a specific object from the third image; And determining a degree of fire based on the color of the extracted specific object.

According to an aspect of the present invention, there is provided a display device including: a visible light surveillance camera for photographing an object existing in a predetermined space; A thermal imaging camera for thermal distribution imaging of the object having pixels lower than pixels of the visible light monitoring camera; An image generating unit for extracting a first image photographed by the visible light monitoring camera and a second image photographed by the thermal imaging camera, and combining the extracted first image and the second image to generate a third image; A fire level determination unit for extracting a specific object from the third image and determining a degree of fire based on the color of the extracted specific object; And a control unit for controlling the visible light monitoring camera, the thermal imaging camera, and the image generating unit.

The fire detection method and system according to an embodiment of the present invention detects a fire using an image captured by a visible light monitoring camera and an image captured by a thermal imaging camera so that it is possible to accurately detect the degree of fire and minimize the occurrence of non- .

1 is a view for explaining a fire detection method according to an embodiment of the present invention.
2 is a block diagram of a fire detection system in accordance with an embodiment of the present invention.
3 is a flow chart illustrating a fire detection method in accordance with an embodiment of the present invention.
4 is a view showing an image taken by a visible light monitoring camera in a fire detection system according to an embodiment of the present invention.
5 is a view showing an image obtained by combining a thermal image and an image photographed by a visible light monitoring camera in a fire detection system according to an embodiment of the present invention.

Hereinafter, a fire detection method and system according to an embodiment of the present invention will be described with reference to the accompanying drawings.

When an element is referred to as "including" an element throughout the specification, it is to be understood that the element may include other elements, without departing from the spirit or scope of the present invention. Also, the terms "part," " module, "and the like described in the specification mean units for processing at least one function or operation, which may be implemented in hardware or software or a combination of hardware and software .

1 is a view for explaining a fire detection method according to an embodiment of the present invention.

The fire detection system 100 can communicate with a specific server 200 or a specific terminal 300 via a network. The network may be a network for wired or wireless communication.

The fire detection system 100 can determine whether or not a fire has occurred based on the detection results detected through various sensors. In addition, the fire detection system 100 can display an image for detecting a fire through image data processing or can detect a fire through the image data processing.

The specific server 200 connected to the fire detection system 100 through the network can receive the fire detection result detected by the fire detection system 100. [ In particular, when the fire detection system 100 recognizes a fire, the fire detection system 100 may transmit a fire detection result or a fire alarm signal to the specific server 200. For example, a server of the fire station may be the specific server 200.

Also, the specific terminal 300 connected to the fire detection system 100 via the network receives the fire detection result sensed by the fire detection system 100 or transmits information about the fire detection to the fire detection system 100 Can be requested. For example, the manager of the fire detection system 100 may remotely monitor the fire detection result using the specific terminal 300.

The specific terminal 300 may be implemented in various forms. The specific terminal 300 may include a fixed terminal as well as a mobile terminal. For example, the specific terminal 300 may include a computer, a notebook, a tablet PC, a mobile phone, a smart phone, a PDA (Personal Digital Assistants), a PMP (Portable Multimedia Player) .

2 is a block diagram of a fire detection system in accordance with an embodiment of the present invention.

As shown, the fire detection system 100 includes a visible light monitoring camera 111, a thermal imaging camera 112, an image generating unit 113, a display unit 114, an alarm unit 115, 116, a sensing sensor 117, a receiving unit 118, a transmitting unit 119, a fire extinguishing unit 120, and a control unit 121. [ However, not all illustrated components are required. The fire detection system 100 can be configured with more components than the components shown, or the fire detection system 100 can be configured with fewer components.

The visible light surveillance camera 111 can take an object existing in a predetermined space as visible light. The predetermined space means a space requiring fire detection, and may include a laboratory, a factory, a building, and the like. Also, the object to be photographed may mean a subject. An example of the visible light surveillance camera 111 is a CC camera. The visible light monitoring camera 111 can be operated in real time. In addition, the visible light monitoring camera 111 is provided with a zoom function to adaptively photograph an object in various environments.

The thermal imaging camera 112 refers to a camera for imaging a thermal image of an object with infrared rays. Thermal image means a thermal distribution image of an object taken with infrared rays. According to the thermal image, colors are different depending on the temperature of the object. For example, if the temperature is high, it appears in red, and if the temperature is low, it may be blue. The thermal imaging camera 112 may be a camera having a low image quality in consideration of the price. (For example, 30 X 30 pixels) of 1000 pixels or less can be obtained by the camera having the low image quality. Since the thermal image is used for determining the degree of fire, it is possible to roughly classify the degree of fire even in the case of a low-quality image.

The image generating unit 113 may generate a first image photographed from the visible light monitoring camera 111 or an image processed from the second image photographed from the thermal image camera 112. For example, the image generating unit 113 may generate the third image by combining the first image and the second image.

The display unit 114 can display various information. For example, the display unit 112 may display at least one of the first image, the second image, and the third image. The manager of the fire detection system 100 can monitor the fire condition through the displayed image.

The alarm unit 115 can output an alarm signal indicating a danger when the detected fire level is equal to or higher than a predetermined level. The alarm signal may be output as a warning sound.

The fire level determination unit 116 extracts a specific object from the third image generated through the combination of the first image and the second image and determines the degree of fire through variable tracking related to the physical quantity of the extracted specific object have. Variables related to the physical quantity of a specific object may include variables related to the color of the extracted specific object.

The fire level determination unit 116 may determine the degree of fire detection by further considering the detection result through the detection sensor 117. [

The detection sensor 117 may include various sensors for fire detection. For example, the detection sensor 117 may include a smoke detection sensor, a flame detection sensor, a heat detection sensor, and the like.

For example, the detection sensor 117 may be provided with a smoke detection sensor at an upper end portion of a predetermined space requiring a fire detection, and a flame detection sensor at a lower end portion thereof. In addition, the sensing sensor 117 may be implemented as a plurality of sensor-combined hybrid sensors.

The receiving unit 118 may receive a specific signal or information from the specific server 200 or the specific terminal 300. For example, the receiving unit 118 may be requested to provide an image (e.g., the third image) displayed on the display unit 114 from a specific terminal 300 connected through a specific application.

The transmitting unit 119 may transmit a specific signal or information to the specific server 200 or the specific terminal 300. For example, the transmitting unit 119 may transmit an image (e.g., the third image) displayed on the display unit 114 to a specific terminal 300 connected through a specific application. In addition, the transmitting unit 119 may transmit a fire alarm signal to the specific server 200 or the specific terminal 300.

The fire extinguishing apparatus 120 refers to a fire extinguishing apparatus according to a control signal from the control unit 121. The fire extinguishing system 120 may be embodied in various forms. For example, the fire extinguishing system 120 may be implemented in the form of a sprinkler.

The control unit 121 includes a visible light monitoring camera 111, a thermal imaging camera 112, an image generating unit 113, a display unit 114, an alarm unit 115, a fire level determination unit 116, a detection sensor 117 ), The receiving unit 118, the transmitting unit 119, and the fire extinguishing apparatus 120, respectively.

3 is a flow chart illustrating a fire detection method in accordance with an embodiment of the present invention.

The image generating unit 113 may extract the first image photographed from the visible light monitoring camera 111 (S310). For example, a high-quality CC camera can be used for the object recognition with the visible light camera 111.

FIG. 4 is a view showing an image photographed through a CC camera, which is an example of a visible light monitoring camera 111. FIG.

The image shown represents an image taken at night from a CC camera. Since the image is photographed using visible light, it is difficult to trust at night. Therefore, the video fire detection may not be accurate with only the first video captured from the surveillance camera 111.

Accordingly, the image generating unit 113 may extract a second image photographed from the thermal imaging camera 112 and combine the second image with the first image to generate a second image (S320, S330). The second image is a thermal image, which is the thermal distribution image of the object. The second image may have different colors depending on the temperature generated in the object.

The third image may be generated in a form of synthesizing a second image in which a temperature distribution is expressed in color on the first image.

The display unit 114 may display the generated third image (S340). The manager of the fire detection system 100 can accurately grasp the fire detection state through the displayed third image.

FIG. 5 is a diagram illustrating a third image generated by combining a first image captured by the visible light monitoring camera 111 and a second image captured by the thermal image camera 112. FIG.

As shown in the figure, the manager of the fire detection system 100 can grasp the image of the fire scene through the third image and grasp the image of the temperature change of the object. Thus, fire images and temperature changes can all be checked through one third image, minimizing non-redundancy. Non-fire refers to a case in which the fire detection system 100 operates while considering that it is not a fire but is considered to be a fire.

The fire level determination unit 116 may determine the degree of fire through parameter tracking related to the color of the object of the third image (S350).

For example, as the color information of the extracted specific object is closer to red, the degree of fire is determined to be a more dangerous stage, and the closer to the blue, the less dangerous level of fire can be determined. The degree of fire refers to the degree of progress of the fire, which can be classified into non fire phase, first phase, second phase, and third phase. Non-fire phase refers to a phase in which no fire has yet occurred. In addition, it can be divided into the first stage, the second stage, and the third stage according to the degree of danger or the progress of the fire.

The fire level determination unit 116 may determine the degree of fire detection by further considering the detection result through the detection sensor 117. [ For example, the fire level determination unit 116 may determine the degree of fire detection by further considering the detection result of at least one of the smoke detection sensor, the flame sensor, and the heat detection sensor.

The alarm unit 115 may output an alarm signal when the fire level determined through the fire level determination unit 116 is equal to or higher than a preset danger level (S360). The alarm signal may be separately output according to the degree of fire. For example, the higher the degree of fire, the greater the volume output.

If the fire level determined through the fire level determination unit 116 is equal to or higher than a preset danger level, the transmission unit 119 may transmit a fire alarm signal to the specific server 200 or the specific terminal 300 (S370 ). The specific server 200 may include a fire station server and the specific terminal 200 may include a fire detector system 100 administrator terminal. By letting the outside know about the occurrence of the fire, it is possible to make the fire evolve quickly.

In addition, the control unit 121 can drive the fire extinguishing apparatus 120 when the fire level determined through the fire level determination unit 116 is equal to or higher than a preset danger level. Since fire detection and extinguishing proceeds through a series of processes, the fire evolving process can be performed quickly.

Meanwhile, according to an embodiment of the present invention, the fire detection system 100 can provide a third image displayed on the display unit 114 to the outside in real time.

For example, when there is the third video request from a specific terminal 300 connected through a specific application, the transmission unit 119 can provide the third video to the specific terminal 300. [

Meanwhile, the fire detection system 100 may allow the connection only when the input password is satisfied at the time of connection through a specific application, thereby providing the 3 images only to the authorized specific terminal 300.

The fire detection method described above can be implemented in the form of a program command that can be executed through various computer means and recorded on a computer-readable recording medium. At this time, the computer-readable recording medium may include program commands, data files, data structures, and the like, alone or in combination. On the other hand, the program instructions recorded on the recording medium may be those specially designed and configured for the present invention or may be available to those skilled in the art of computer software.

The computer-readable recording medium includes a magnetic recording medium such as a magnetic medium such as a hard disk, a floppy disk and a magnetic tape, an optical medium such as a CD-ROM and a DVD, a magnetic disk such as a floppy disk, A magneto-optical media, and a hardware device specifically configured to store and execute program instructions such as ROM, RAM, flash memory, and the like.

The recording medium may be a transmission medium, such as a light or metal line, a wave guide, or the like, including a carrier wave for transmitting a signal designating a program command, a data structure, and the like.

The program instructions also include machine language code, such as those generated by the compiler, as well as high-level language code that can be executed by a computer using an interpreter or the like. The hardware devices described above may be configured to operate as one or more software modules to perform the operations of the present invention, and vice versa.

The above-described fire detection method and system can be applied to a configuration and a method of the embodiments described above in a limited manner, but the embodiments can be modified so that all or some of the embodiments are selectively combined .

100: Fire detection system
111: Visible Light Camera
112: Thermal imaging camera
113:
114:
115:
116: Fire level determination unit
117: Sensing sensor
118: Receiver
119:
120: Fire extinguisher
121:
200: Specific server
300: Specific terminal

Claims (16)

Extracting a first image photographed from a visible light surveillance camera;
Extracting a second image photographed from a thermal imaging camera having pixels lower than pixels of the visible light monitoring camera;
Combining the first image and the second image to generate a third image;
Extracting a specific object from the third image; And
And determining a degree of fire based on the color of the extracted specific object. delete The fire detection method according to claim 1,
Further comprising the step of outputting an alarm signal when the determined fire level is above a predetermined level. The fire detection method according to claim 1,
Further comprising the step of transmitting a fire alarm signal to at least one of a predetermined server and a specific terminal when the determined fire level is above a predetermined level. 2. The method according to claim 1,
The smoke detection sensor, the heat detection sensor, and the flame detection sensor. The fire detection method according to claim 1,
Further comprising the step of driving the fire extinguishing device when the determined fire level is equal to or higher than a predetermined level. The method of claim 1,
Receiving a request for providing the third image from a specific terminal connected through a specific application;
And providing the third image to a specific terminal. delete A visible light surveillance camera for photographing an object existing in a predetermined space;
A thermal imaging camera for thermal distribution imaging of the object having pixels lower than pixels of the visible light monitoring camera;
An image generating unit for extracting a first image photographed by the visible light monitoring camera and a second image photographed by the thermal imaging camera, and combining the extracted first image and the second image to generate a third image;
A fire level determination unit for extracting a specific object from the third image and determining a degree of fire based on the color of the extracted specific object; And
And a control unit for controlling the visible light monitoring camera, the thermal imaging camera, and the image generating unit. delete delete delete delete delete delete delete

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