KR102153465B1 - Smart system for detecting fire and device for the same - Google Patents

Abstract

The present technology relates to a smart fire detection system and to a device therefor. The smart fire detection system of the present technology comprises: a server; and a plurality of fire detection devices which are spaced apart from each other while including a visible light image sensor collecting image video information on a detection area and a thermal image sensor collecting temperature data on the detection area. The fire detection devices each include: a first determination portion which determines that a first event occurs when a predetermined condition is satisfied from the video data; a second determination portion which determines that a second event occurs when a predetermined condition is satisfied from the temperature data; and a processing portion overlapping the visible light image and the thermal image generated from the temperature data satisfying a preset condition from the temperature data and processing the visible light image and the thermal image to the server, when at least one of the first event and the second event occurs. According to the present technology, the load of a central center is distributed, the total amount of traffic is reduced, the probability of false positives is reduced, and follow-up actions by an administrator can be quickly performed.

Description

Smart system for detecting fire and device for the same

The present invention relates to a smart fire detection system and a device therefor, and more particularly, to a smart fire detection system using both a visible light image and a thermal image, and an apparatus therefor.

Closed Circuit Television (CCTV) is a system that transmits images from a specific building or facility to a specific receiver using a wired or special wireless transmission path. There are various uses such as industrial, educational, medical, traffic control surveillance, disaster prevention, and internal image information transmission.

The net function is very large, such as crime prevention and deterrence effect, ease of detection and arrest of criminals, reduction of fear of crime, and supplementation of police personnel, but recently, with the rapid development of information and communication technology, problems of portrait rights and privacy of ordinary citizens also appear. .

On the other hand, CCTV methods include a centralized monitoring system and an edge monitoring system. The centralized type simply collects images from the camera at the central center and analyzes the images collectively. The edge type configures a video analysis function in each camera itself, and transmits the surveillance video only when a specific event occurs. The latter is one of the methods that are widely used and studied recently because it can distribute the load of the central center and greatly reduce the total amount of traffic.

In addition, in order to improve the accuracy of video surveillance, research on CCTV, which applies not only visible light cameras but also thermal imaging cameras, is also active. However, when both the thermal image and the visible light image are used, the cost of the equipment itself increases as well as the amount of data to be processed, which increases the cost of system construction and maintenance, and there are limitations of miniaturization.

This is why there is a need for a system that uses both visible light cameras and thermal imaging cameras, but can reduce the total amount of traffic and build at low cost.

In this regard, Korean Patent Registration No. 10-2092552 (invention name: intelligent all-weather image display camera system) includes a visible image photographing unit for photographing a visible ray image of a preset photographing area, and a thermal image of the photographing region. In the thermal imaging unit, in image-processing and synthesizing the visible light image and the thermal image, the coordinates of an area in which a preset object is detected in the visible light image and a thermal image area are matched, or the thermal image A camera system including a controller for generating a first overlay image by matching coordinates of a region with a predetermined temperature change and a visible region is shown.

However, even in the case of the prior patent, the problem of increasing cost due to the application of the thermal imaging camera cannot be solved. It only discloses a thermal sensing configuration using the performance of the thermal imaging camera itself, and does not show any improvement measures to overcome its inherent performance. Although it is possible to increase the accuracy of fire detection by increasing the heat detection resolution and increasing the number of installations, efforts to design the system more efficiently under limited resources are insufficient.

The inventor of the present invention came to complete the present invention after long research and trial and error in order to solve these problems.

An embodiment of the present invention provides an all-in-one smart fire detection system that distributes the load of the central center, reduces the total amount of traffic, lowers the probability of false positives, and enables quick follow-up actions by the administrator.

Meanwhile, other objects not specified of the present invention will be additionally considered within a range that can be easily deduced from the following detailed description and effects thereof.

The smart fire detection system according to an embodiment of the present invention includes a server; And a plurality of fire detection devices spaced apart from each other including a visible light image sensor that collects image data on the surveillance area and a thermal image sensor that collects temperature data on the surveillance area. Each of the first determination units determines that a first event occurs when a predetermined condition is satisfied from the image data; A second determination unit that determines that a second event occurs when a predetermined condition is satisfied from the temperature data; And a processing unit that, when at least one of the first event and the second event occurs, overlaps the visible light image and a thermal image generated from temperature data that satisfies a preset condition among the temperature data and processes to be transmitted to the server. I can.

The processing unit causes the transmission of the superimposed image to start at the same time as at least one of the first event and the second event (a first time point), and after the disappearance time of all the events (second time point) The transmission of the superimposed image may be processed to end.

When the transmission of the superimposed image is received from the first fire detection device, the server transmits a message notifying that event-based active transmission by the first fire detection device is being performed to the second fire detection device, and the second The processing unit of the fire detection device may process the transmission of the superimposed image to be terminated after the disappearance of all of the generated events (second time point) and after the end time of reception of the notification message (third time point).

The processing unit of the second fire detection device may determine whether to receive the notification message while maintaining transmission for a predetermined time (preliminary transmission duration) after the extinguishing point (second point in time) of all the generated events.

A preset condition for determining the occurrence of the first event and a preset condition for generating the superimposed image may have different temperature values.

In addition, a smart fire detection device according to an embodiment of the present invention is a fire detection device connected to a server through a network, comprising: a visible light image sensor collecting image data for a predetermined monitoring area; A thermal image sensor collecting temperature data for the predetermined monitoring area; A first determination unit that determines that a first event occurs when a predetermined condition is satisfied from the image data; A second determination unit that determines that a second event occurs when a predetermined condition is satisfied from the temperature data; And when at least one of the first event and the second event occurs (a first time point), a thermal image generated from temperature data that satisfies a preset condition among the visible light image and the temperature data is superimposed and processed to be transmitted to the server. A processing unit; wherein the processing unit checks whether a transmission maintenance message is received from the server while maintaining the transmission of the superimposed image for a predetermined first time after the disappearance point (a second point in time) of all of the generated events, and When the transmission maintenance message is received, transmission of the superimposed image may be further maintained for a second predetermined time.

This technology distributes the load of the central center, reduces the total traffic volume, lowers the probability of false positives, and enables quick follow-up actions by the administrator.

In addition, although this technology is an existing edge-type monitoring system, it is possible to increase the efficiency of monitoring by an administrator by allowing sufficient video for monitoring to be transmitted to the server side.

1 is a diagram showing the overall configuration of a fire detection system according to an embodiment of the present invention.
2 is a view showing in more detail the configuration of a fire detection device according to an embodiment of the present invention.
3A to 3C are diagrams schematically illustrating a process of generating a superimposed image by a fire detection device according to an embodiment of the present invention.
4 is a diagram showing a schematic situation as viewed from above of a surveillance area in which a fire detection system according to an embodiment of the present invention is installed.
FIG. 5 is a diagram illustrating an example in which a superimposed image received from each fire detection device in FIG. 4 is displayed through a display device connected to a server.
FIG. 6 is a diagram illustrating a timeline of when each fire detection device transmits an overlapped image to a server and when the transmission ends.
The accompanying drawings are exemplified by reference for an understanding of the technical idea of the present invention, and the scope of the present invention is not limited thereto.

In the following, the most preferred embodiment of the present invention will be described. In the drawings, thickness and spacing are expressed for convenience of description, and may be exaggerated compared to actual physical thickness. In describing the present invention, known configurations irrelevant to the gist of the present invention may be omitted. In adding reference numerals to elements of each drawing, it should be noted that only the same elements have the same number as possible, even if they are indicated on different drawings.

1 is a diagram showing the overall configuration of a smart fire detection system according to an embodiment of the present invention.

As shown in Fig. 1, the smart fire detection system 1 (hereinafter, simply referred to as a'fire detection system') includes a server 100 and a plurality of fire detection devices 200A to 200D.

The server 100 is connected to a plurality of fire detection devices 200A to 200D through a wired/wireless communication network.

The server 100 may store image data transmitted from a plurality of fire detection devices 200A to 200D and may process the data according to a user's request.

The server may display the monitoring results collected from the plurality of fire detection devices 200A to 200D through a plurality of display devices. The display device may display a color corresponding to a first event based on visible light data and a second event based on thermal image data. A pattern may be represented instead of or with a color, and markers such as lighting, sound, vibration, etc. may be represented together.

The server includes a storage (not shown) therein. The storage can store visible light data and thermal image data for a certain period of time. Conditions such as the type of information to be stored and the storage time may be changed in consideration of the purpose of use of the user or the storage capacity of the storage.

The storage may be a Network Video Recorder (NVR).

Interface devices such as a keyboard, speaker, mouse, screen, and display device may be connected to the server. This may receive the user's intention to change or adjust the monitoring result in response to the user's intention. Alternatively, emergency lights, warning lights, and alarms determined through the user's intention or an automated program can be performed.

In the present invention, a plurality of fire detection devices 200A may be referred to as a single fire detection device 200 representing 200D.

Referring to part A of FIG. 1 (a front view of the fire detection device), the fire detection device 200 includes a visible light camera VC that acquires a visible light image for a predetermined area in front, and a visible light camera for the predetermined area. It includes a thermal imaging camera (TC) for acquiring a thermal image.

Image data generated by the fire detection device may be generated in a format that can be stored in a storage of the server.

The visible light camera VC includes a visible light image sensor.

The visible light image sensor includes a form in which fine pixels composed of an optical conversion semiconductor and a coupling device are precisely integrated, and each pixel can be transferred after accumulating electric charges generated by light energy through a lens. In the present invention, for convenience of explanation, it will be described that the device for obtaining a visible light image is a visible light camera, but the present invention is not limited thereto, and an image camera including a visible light image sensor, a dome camera, a low light camera, a zoom camera, It may be a variety of devices such as a web camera.

The visible light image sensor collects image data for a surveillance area that is preset or determined by a user's request.

The thermal imaging camera TC includes a thermal imaging sensor.

A thermal image sensor is a device that converts infrared rays from an object generating heat into electrical signals and displays them in color according to their size. In the present invention, for convenience of explanation, it will be described that an apparatus for obtaining a thermal image is a thermal imaging camera, but the present invention is not limited thereto, and may be various devices such as an infrared camera including a thermal image sensor.

The thermal image sensor collects temperature data for a monitoring area that is preset or determined by a user's request.

Meanwhile, the distance between the visible light camera and the thermal imaging camera in the fire detection device shown in part A of FIG. 1 may be used to generate a superimposed image to be described later. The focal length of the visible light camera and the thermal imaging camera may be used in a mapping process of overlapping the visible light image and the thermal image obtained from each.

In this way, the fire detection device improves the accuracy of fire detection by utilizing both visible light images and thermal images for fire detection. For example, in some situations in which the false detection rate is high when only visible light images are used, the false detection rate for the above situations (such as red gloves) can be greatly reduced by using a thermal image related to temperature together.

To this end, the fire detection apparatus according to an embodiment of the present invention generates a visible light image and a thermal image and transmits it to the server. At this time, the fire detection device is an edge-type monitoring system that determines the occurrence of an event by itself and transmits only the event image to the server.

Hereinafter, a process of transmitting an event image by the fire detection device will be described in more detail.

2 is a view showing in more detail the configuration of a fire detection device according to an embodiment of the present invention.

As shown in FIG. 2, the fire detection device 200 includes a visible light image sensor 210, a first determination unit 220, a thermal image sensor 230, a second determination unit 240, a processing unit 250, and It may include a communication unit 260.

The operations of the visible light image sensor 210 and the thermal image sensor 230 are the same as described above. Hereinafter, operations of the determination units, the processing unit, and the communication unit will be described.

The first determination unit 220 analyzes the image data collected by the visible light image sensor 210 and determines that a first event occurs when a predetermined condition is satisfied.

For example, when a flame pattern is included by analyzing a visible light image acquired by a visible light image sensor, a first event may be generated.

At this time, one or more of several techniques for recognizing a flame pattern from a visible light image may be applied. For example, an algorithm using a brightness threshold value for determining a flame based on whether a color level value of a flame exceeds a threshold value may be applied. As another example, an algorithm using a spatial domain analysis for analyzing a texture of a candidate flame region or a frequency component of the outline may be applied. As another example, a time domain frequency analysis algorithm for analyzing a frequency of a specific level value of a flame candidate region that changes with time may be applied. In any case, it is common in that the first event is generated based on whether a predetermined condition (ie, setting a threshold value and exceeding the threshold value) is satisfied to determine the occurrence of the event.

Meanwhile, when a smoke pattern is included instead of or with the flame, the first event may be generated. Likewise, one or more techniques for recognizing smoke patterns from visible light images may be applied. For example, an adaptive Gaussian mixed model, a temporal accumulation technique of a temporal derivative image, etc. may be applied.

The second determination unit 240 analyzes the temperature data collected by the thermal image sensor 230 and determines that a second event occurs when a preset condition is satisfied.

For example, when a temperature value exceeding a preset temperature is included by analyzing temperature data, a second event may be generated.

For example, when the threshold value is set to 50° C., a second event is generated when a value exceeding 50° C. exists in temperature data collected by the thermal image sensor.

In addition, if there is even one value exceeding the threshold value in the temperature data, an event may be generated, but the event may be generated by limiting to the case where two or more neighboring values exist. It can be changed according to the purpose of use or the environment of use of the fire detection device.

On the other hand, the thermal image sensor collects temperature data and converts it to color data (i.e., thermal image), and utilizes the color data after conversion (i.e., whether there is a color value exceeding the threshold value in the thermal image). The occurrence of the second event may be determined from whether or not), but in the present invention, an embodiment using temperature data before conversion will be mainly described.

When at least one of the first event and the second event occurs, the processor 250 superimposes the visible light image acquired by the visible light camera VC and the thermal image acquired by the thermal imaging camera TC, and sends the image to the server 100. Process to be transmitted.

Transmission may be performed by the communication unit 260. The fire detection device further includes a communication unit for communicating with the server.

The overlapping process of the processing unit according to an embodiment of the present invention may include a mapping process of overlapping the first layer of the visible light image and the second layer of the thermal image.

At this time, the first layer of the visible light image (hereinafter simply referred to as the'first layer') is the second layer of the thermal image (hereinafter simply referred to as the'second layer'), whereas the visible light image for a predetermined area in front is used as it is. Note that only some temperature values (ie, temperature values exceeding a threshold value) for a predetermined area in front are extracted thermal images.

Specifically, the second layer overlaps with the first layer after the extraction process is performed only for a portion exceeding the threshold value before the process of overlapping with the first layer.

According to an embodiment of the present invention, the threshold value for the second layer and the threshold value for determining the occurrence of the second event may be set differently from each other. This is because the process of determining the occurrence of the second event and the process of creating the second layer correspond to separate processes. This is because the event occurrence determination relates to the transmission start point of the surveillance image, and the second layer generation relates to the surveillance image to be actually provided to the manager.

For example, the threshold value for the second layer may be lower than the threshold value for determining the occurrence of the second event. For example, the former may be 30°C and the latter may be 50°C. By setting the second layer threshold relatively low, actual monitoring by the manager (which is performed while the manager visually checks through the display device) is performed more precisely at a lower temperature.

According to an embodiment of the present invention, the extraction process includes converting only temperature data exceeding the threshold value into color data. That is, after only the portion in which the second event has occurred is extracted, it becomes the second layer. If there is no part in which the second event has occurred, since there is no extraction, zero data may be the second layer. Alternatively, the zero data may include data representing a transparent image.

3a to 3c schematically show this process.

As shown in FIG. 3A, a first event and a second event occurred due to a fire occurrence in a predetermined area in front (for example, an ESS installation area), and the first layer L1 of the visible light image and The second layer L2 of the thermal image may be overlapped and transmitted to the server. The server administrator can see the superimposed image (OL) through the display device and quickly determine the occurrence of fire through visible light images as well as thermal images.

In the drawings, the flame region is referred to as F, and the high temperature region is referred to as T. In the superimposed image of FIG. 3A, the flame region F and the high temperature region T substantially coincide.

As shown in FIG. 3B, a first event occurred due to the appearance of a worker wearing a red hat in a predetermined area in front, and the first layer L1 of the visible light image and the second layer of the thermal image ( L2) can be overlapped and transmitted to the server. At this time, note that the second layer L2 of the thermal image is zero data. This is because the second event has not occurred. Since the high temperature region does not exist in the superimposed image, a false detection situation due to the appearance of a red hat in the monitoring region can be easily recognized by the server administrator.

In the drawings, the red hat is referred to as C. In FIG. 3B, the high temperature region that satisfies the preset condition does not exist, and thus the high temperature region does not exist in the superimposed image OL.

As shown in FIG. 3C, a second event occurred due to the occurrence of a fire on the other side in a predetermined area in front, and the first layer L1 of the visible light image and the second layer L2 of the thermal image overlap. Can be sent to the server. Note that, as in the case of FIG. 3B described above, even though only one of the two events occurs, an overlapping image OL is generated and transmitted to the server. The server administrator can quickly determine the occurrence of a fire through the display device through heat detection that is not exposed from the visible light image.

In FIG. 3C, a flame region does not exist in the visible light image, a high temperature region exists in the thermal image, and only a high temperature region exists without a flame region in the superimposed image OL.

When the event occurs as described above, an image is transmitted from the fire detection device to the server. Hereinafter, a process in which transmission of an image is started and then terminated is described.

Since the edge-type monitoring system is to distribute the load of the central center and reduce the total amount of traffic, it is necessary to set the transmission end point of when to end transmission of the superimposed image.

4 is a diagram showing a schematic situation as viewed from above of a surveillance area in which a fire detection system according to an embodiment of the present invention is installed.

5 is a diagram illustrating an example in which event images (ie, superimposed images) received from each fire detection device in FIG. 4 are displayed through a display device connected to a server.

In addition, FIG. 6 is a view showing a timeline of a time point at which each fire detection device transmits an event image to a server and a time point at which the transmission ends.

First, referring to FIG. 4, four fire detection devices 200A to 200D are installed in a predetermined monitoring area. The predetermined monitoring area (may be an ESS installation area. For convenience of explanation, it is assumed that there are 4 fire detection devices, but the present invention is not limited to the number.

Each fire detection device monitors a front area (a monitorable area indicated by a dotted line) and transmits an overlapping image to the server 100 when at least one of the first event and the second event occurs. Accordingly, the surveillance image as shown in FIG. 5 is displayed through the display device (Monitor).

Reference is made to the first fire detection device 200A, the second fire detection device 200B, the third fire detection device 200C, and the fourth fire detection device 200D in order from the fire detection device on the upper left of the drawing. The first energy storage module R1, the second energy storage module R2, the third energy storage module R3 and the fourth energy storage module R4 are referred to in order from the energy storage module on the upper left of the drawing.

When an event occurs, the event image transmitted from the first fire detection device 200A is displayed as channel 1 (CH1) on the display device. In order, the event image transmitted from the second fire detection device 200B is to channel 2 (CH2), the event image transmitted from the third fire detection device 200C is to channel 3 (CH3), and the 24th fire The event image transmitted by the sensing device 200D is referred to as channel 4 (CH4).

As shown in FIGS. 4 and 5, as a fire FI occurs in the first energy storage module R1, the first fire detection device 200A detecting the first event and the second event is An event video including (F) and high temperature region (T) is sent through channel 1 (CH1).

Relatively, the second fire detection device, the third fire detection device, and the fourth fire detection device did not detect the first event, but by detecting the second event, the event image including the high temperature region T is displayed on each channel. It is sent through the field (CH2 to CH4).

The location or size of the fire FI may appear in a wide variety, but in the present invention, it is assumed that a fire occurs on the left side of the first energy storage module R1 in the drawing and in the middle of the height.

When considering the location and size of the fire FI, the first fire detection device 200A and the third fire detection device 200C first detect the occurrence of the event. Accordingly, as illustrated in FIG. 6, the start time of event image transmission of the first fire detection device 200A and the third fire detection device 200C may be substantially the same. Of course, when considering the location of the fire in the drawing, the start time of the event image transmission of the first fire detection device is slightly earlier. At this time, the first fire detection device starts transmitting the event image by detecting both the occurrence of the first and the second event, and the third fire detection device only generates the second event on the location of the monitoring area shown in FIG. 4. By sensing, the transmission of the event video starts.

Relatively, the second fire detection device 200B detects the occurrence of an event later than the first and third fire detection devices 200A and 200C. In addition, the fourth fire detection device 200D detects the occurrence of the event later than the second fire detection device 200B. This is because the determination of the occurrence of the second event based on the temperature data appears belatedly because the distance from the fire (FI) is the farthest.

All of these event-based transmission starts correspond to active transmission operations. That is, each of the fire detection devices is an operation of actively transmitting an event image to the server from the occurrence of an event (first event and/or second event occurrence) determined by itself.

Subsequently, with reference to FIG. 6, the transmission end time point will be described. At the start of transmission, only active transmission is involved, but at the end of transmission, passive transmission is also involved. The passive transmission operation is contrasted with the active transmission operation. The passive transmission operation is transmission due to the active transmission operation of another fire detection device. It will be described in detail below.

Basically, each fire detection device terminates the transmission when neither the occurrence of the first event nor the occurrence of the second event is detected, but according to the embodiment of the present invention, the transmission is not immediately terminated, but the transmission is preliminarily continued. It includes a preliminary transmission duration and a passive transmission duration to continue transmission by other fire detection devices.

All of these operations are optimal designs to most efficiently distribute the load and reduce the total amount of traffic.

Specifically, when both the first event and the second event disappear, the first fire detection device 200A does not immediately end and continues transmission for a predetermined time. Corresponds to the reserve transmission duration. For example, it may be 5 minutes.

At this time, during the preliminary transmission duration, the first fire detection device 200A determines whether a notification message according to the active transmission operation of the other fire detection devices 200B to 200D is received through the server 100. The communication unit may be involved in receiving the message. That is, the first fire detection device that has entered the preliminary transmission duration may inquire whether there is an active transmission operation on the server side while continuing to transmit the superimposed image.

The server 100 according to an embodiment of the present invention transmits a message indicating that active transmission is in progress to another fire detection device when an event image according to an event-based active transmission operation is received from any one fire detection device. The server according to an embodiment of the present invention may return a message indicating whether there is an active transmission operation by another fire detection device when any one fire detection device that has entered the preliminary transmission duration makes an inquiry.

For example, when the first fire detection device transmits the event image to the server as it detects the occurrence of the first event and the second event, the server receiving the event indicates that active transmission is performed according to the occurrence of the event from any one device. The informing message is transmitted to other devices, that is, the second to fourth fire detection devices. The notification message suffices to include information that active transmission is being made by any one or more fire detection devices, and does not require identification of the fire detection devices.

That is, when the server 100 receives an event image according to an event-based active transmission, the server 100 transmits a notification message to other devices except for the transmitting device. Transmission of the notification message may be performed periodically between reception of event images.

The server 100 according to an embodiment of the present invention may include a transmission unit (not shown) for transmitting a notification message to each fire detection device connected through a network.

When the notification message is received during the preliminary transmission duration, the fire detection device continues to transmit the superimposed image even after the preliminary transmission duration. Sent even though no event has occurred. It is contrasted with the event-based active transmission described above. Corresponds to the passive transmission duration. The manual transmission operation continues until no more notification messages are received. Although no event has occurred, the transmission of superimposed images is continued for a certain period of time, thereby enhancing the efficiency of coping with follow-up measures in response to a fire occurrence (or a fire-like situation) by the manager. In the edge-type management system, only the event video is transmitted, which makes up for a management loophole. In addition, in the edge-type management system, a non-transmission situation resulting from an error in determining the occurrence of an event or an excessively upward setting of a threshold for event occurrence is compensated.

For example, after starting the transmission of the superimposed image according to the determination of the occurrence of the second event, the third fire detection device 200C terminates the transmission when the occurrence of the second event is no longer detected, but the preliminary transmission duration and manual Transmission of the superimposed image can be continued for the duration of the transmission. During the preliminary transmission duration, the third fire detection device determines whether a notification message according to the active transmission operation of other fire detection devices is received through the server, and as shown in FIG. 6, the first fire detection device 200A The passive transmission operation is performed by receiving a message from the server 100 indicating that the active transmission is in progress by the first fire detection device.

Note that not an event-based active transmission operation, but a passive transmission operation according to the active transmission operation of other fire detection devices even though all events have disappeared.

When a message indicating that the active transmission is in progress is no longer received, the third fire detection device ends transmission of the superimposed image.

Also, for example, after the second fire detection device 200B starts transmitting the superimposed image (later than the first and third fire detection devices) according to the determination of the occurrence of the second event, the occurrence of the second event is no longer detected. If not, the transmission is terminated, but the transmission of the superimposed image can be continued for the preliminary transmission duration and the manual transmission duration. During the preliminary transmission duration, the second fire detection device determines whether a notification message according to the active transmission operation of other fire detection devices is received through the server, and as shown in FIG. 6, the first fire detection device 200A The passive transmission operation is performed by receiving a message from the server 100 indicating that the active transmission is in progress by the first fire detection device.

In this process, not only the first fire detection device but also a message indicating that active transmission according to the third fire detection device is in progress may be received from the server, whereby the second fire detection device may perform a passive transmission operation. In the following description, the active transmission progress of the first fire detection device that performs the active transmission operation for the longest time will be described.

When a message indicating that the active transmission is in progress is no longer received, the second fire detection device ends transmission of the superimposed image.

Also, for example, after the fourth fire detection device 200D starts transmitting the superimposed image (later than the first, second, and third fire detection devices) according to the determination of the occurrence of the second event, the occurrence of the second event If it is no longer detected, the transmission is terminated, but the transmission of the superimposed image can be continued for the preliminary transmission duration and the manual transmission duration. During the preliminary transmission duration, the fourth fire detection device determines whether a notification message according to the active transmission operation of other fire detection devices is received through the server, and as shown in FIG. 6, the first fire detection device 200A The passive transmission operation is performed by receiving a message from the server 100 indicating that the active transmission is in progress by the first fire detection device.

In this process, as well as the first fire detection device, a message indicating that active transmission is in progress according to the second fire detection device or the third fire detection device may be received from the server, whereby the fourth fire detection device performs a passive transmission operation. However, in the present invention, the description will be made based on the active transmission progress of the first fire detection device that performs the active transmission operation for the longest time.

When a message indicating that active transmission is in progress is no longer received, the fourth fire detection device ends transmission of the superimposed image.

As described above, when at least one of the first event and the second event occurs (ie, the first time point), each fire detection device starts transmitting the superimposed image. The start point of transmission for each fire detection device may have a difference depending on the timing of determination of the occurrence of the event (as shown in FIGS. 4 to 6, the further the event occurs, the slower the start point of transmission is Has).

In addition, when all of the events determined to have occurred have disappeared (ie, the second time point), each fire detection device terminates the transmission of the superimposed image, but does not immediately terminate the transmission and continues the transmission for a certain period of time. That is, transmission is continued for a predetermined preliminary transmission duration, and transmission is further continued from whether active transmission by another device continues. As a result, sufficient surveillance images are secured even after an event occurs, and prompt follow-up actions by the manager are possible. The third point in time refers to a point in time when there is no more active transmission by another fire detection device, that is, a point in time when a message is no longer received. In other words, all fire detection devices are designed to continue to transmit event images until the event occurrence of all fire detection devices ends even when the event occurrence ends.

Previously, interest was only in the start stage of transmission of the event image according to the occurrence of an event, but in the smart fire detection system according to the embodiment of the present invention, the initial response and follow-up response of fire detection are performed through an optimal design up to the end of transmission of the event image. It has the effect of load balancing and traffic reduction while securing sufficient surveillance video for the purpose.

Embodiments of the present invention may be implemented in the form of program instructions that can be executed through various computer means and recorded in a computer-readable medium. The computer-readable medium may include program instructions, data files, data structures, and the like alone or in combination. The program instructions recorded on the medium may be specially designed and configured for the present invention, or may be known and usable to those skilled in computer software. Examples of computer-readable recording media include magnetic media such as hard disks, floppy disks, and magnetic tapes, optical media such as CD-ROMs and DVDs, and magnetic media such as floptical disks. -Examples of program instructions such as magneto-optical, ROM, RAM, flash memory, etc., can be executed by a computer using an interpreter as well as machine code such as those made by a compiler. Contains high-level language code. The above-described hardware device may be configured to operate as at least one software module to perform the operation of the embodiments of the present invention, and vice versa.

As described above, in the present invention, specific matters such as specific components, etc., and limited embodiments and drawings have been described, but this is provided only to help a more general understanding of the present invention, and the present invention is not limited to the above embodiments. , If a person of ordinary skill in the field to which the present invention belongs, various modifications and variations are possible from these descriptions. Therefore, the spirit of the present invention is limited to the described embodiments and should not be defined, and all things that are equivalent or equivalent to the claims as well as the claims to be described later fall within the scope of the spirit of the present invention. .

1: smart fire detection system
100: server
200, 200A, 200B, 200C, 200D: fire detection device
210: visible light image sensor
220: first judgment unit
230: thermal image sensor
240: second judgment unit
250: processing unit
260: Ministry of Communications

Claims (6)

Server 100; And
A plurality of fire detection devices 200 spaced apart from each other including a visible light image sensor 210 for collecting image data for the surveillance area and a thermal image sensor 230 for collecting temperature data for the surveillance area; Including,
Each of the fire detection devices 200,
A first determination unit 220 that determines that a first event occurs when a predetermined condition is satisfied from the image data;
A second determination unit 240 that determines that a second event occurs when a predetermined condition is satisfied from the temperature data; And
When at least one of the first event and the second event occurs, a processing unit 250 that superimposes the visible light image and the thermal image generated from the temperature data satisfying a preset condition among the temperature data and processes to be transmitted to the server. Includes,
The processing unit causes the transmission of the superimposed image to start at the same time as at least one of the first event and the second event (a first time point), and after the disappearance time of all the events (second time point) Smart fire detection system, characterized in that processing to terminate the transmission of the superimposed image. delete The method of claim 1,
When the transmission of the superimposed image is received from the first fire detection device, the server transmits a message indicating that event-based active transmission by the first fire detection device is being performed to the second fire detection device,
The processing unit of the second fire detection device may process the transmission of the superimposed image to be terminated after the disappearance of all of the generated events (second time point) and after the end time of reception of the notification message (third time point). Smart fire detection system characterized by. The method of claim 3,
The processing unit of the second fire detection device is characterized in that it determines whether or not the notification message is received while maintaining transmission for a predetermined time (preliminary transmission duration) after the extinguishing point (second time point) of all of the generated events. Smart fire detection system. The method of claim 1,
Smart fire detection system, characterized in that the preset condition for determining the occurrence of the first event and the preset condition for generating the superimposed image have different temperature values. A fire detection device 200 connected to the server 100 through a network,
A visible light image sensor 210 for collecting image data for a predetermined surveillance area;
A thermal image sensor 230 for collecting temperature data for the predetermined monitoring area;
A first determination unit 220 that determines that a first event occurs when a predetermined condition is satisfied from the image data;
A second determination unit 240 that determines that a second event occurs when a predetermined condition is satisfied from the temperature data; And
When at least one of the first event and the second event occurs (a first time point), a processing unit that superimposes the visible light image and a thermal image generated from temperature data satisfying a preset condition among the temperature data and processes to be transmitted to the server (250); including,
The processing unit checks whether a transmission maintenance message is received from the server while maintaining the transmission of the superimposed image for a predetermined first time after the disappearance of all the events (second time), and the transmission maintenance message When received, the smart fire detection device, characterized in that further maintaining the transmission of the superimposed image for a second predetermined time.

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