JP2615270B2 - Fire monitoring equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to the detect fires within Therefore monitoring area to a video camera for monitoring a fire sensor
That relating to fire monitoring equipment.

[0002]

Conventionally, as such fire monitoring equipment,
For example, there is one disclosed in JP-A-62-285198. Written that fire monitoring device is provided with a thermal radiation sensor for detecting thermal radiation emitted from the flame of a fire as a fire sensor, the fire detection sensor repeats the vertical and horizontal scanning of the monitored area at a predetermined cycle Thus, the monitoring area is two-dimensionally scanned to monitor for the occurrence of a fire.

[0003] further comprising a monitoring Bideoka <br/> ra for imaging a monitoring region, when detecting the flame to a certain scanning area of the fire sensor surveillance area, a television camera for monitoring to said scanning zone direction by directing, with imaging the situation of fire, so as to provide accurate fire information to display an image janitor etc. in real time on a monitor television job emissions for example installed in a monitoring room or the like .

[0004]

[SUMMARY OF THE INVENTION However, in such a fire monitoring device that monitors a fire conventional fire detecting sensor by the surveillance video camera <br/> Te surveillance area, When the fire sensor detects the first flame, the drive motor causes the surveillance video camera to point toward the scan area where the flame was found and to be fixed in that direction.

[0005] Therefore, although it is extremely effective to image the first flame detected by the fire detection sensor, in the case of a fire in which flames are generated at a plurality of places, it is necessary to detect the fire situation in the entire monitoring area. There was a problem that can not be. The present invention has been made to solve such a problem, and when a plurality of flames are generated in a monitoring area, the status of a plurality of flames in each scanning area is accurately monitored by a monitoring video camera. And comprehensively monitor the entire monitoring area.
An object of the present invention is to provide a fire monitoring apparatus that.

[0006]

According to the present invention, there is provided a fire detection sensor for detecting a flame in a fire monitoring area by scanning the fire monitoring area.
Determination means for determining a fire on the basis of the detection output from the fire detection sensor, according to fire is determined at determination means
Video camera pointing at the flame position
La is directed to a fire monitoring device that Yusuke <br/> and monitor television for displaying an image obtained by imaging.

[0007] The fire detection area is detected by a fire detection sensor.
By the time the scanning of the entire area is completed,
A storage unit for sequentially storing the position information of the scanning area of the fire detection sensor at the time of the determination, and a pointing direction of the video camera is determined based on the position information sequentially stored in the storage unit
Then point the video camera in the determined direction
And control means for causing the

Further , a fire monitoring area is provided by a fire detection sensor.
By the time scanning is completed, the judgment means will judge that a fire has occurred.
Information on the scanning area of the fire detection sensor at the time of
Storage means for sequentially storing, are sequentially stored in the storage means
Determine the pointing direction of the video camera based on the position information,
Each time an instruction is given by manual operation with the operating means, this decision is made.
And control means for sequentially directing the video camera in the pointing direction
It is provided with.

The control means may store a plurality of positions in the storage means.
If the information is stored, the video camera
Summarize data for each of the nearby positions that fall within the angle of view,
Is determined as the directivity direction.
You. In addition, the control means records in advance the danger zone in the monitoring area.
The location information stored in the storage means
Point the video camera in sequence, giving priority to the corresponding position
It is intended to be.

[0010] The control means may further include:
The video camera should be pointed sequentially at predetermined time intervals.
It was done. Fire monitoring by fire detection sensor
By the time the scanning of the entire area is completed, the judgment means fires
Position information of the scanning area of the fire detection sensor
Means for sequentially storing information, and a plurality of positions in the storage means.
If information is stored, change the angle of view of the video camera.
Control means for enlarging and imaging the monitoring area.
It is something that has been done.

[0011] In the fire monitoring apparatus of the present invention having such a structure, the fire monitoring area all the fire detection sensor
By the time the scanning of the body is completed, the judgment means judges that a fire has occurred
Sequentially stored in the storage unit the position information of the scanning area of the fire detection sensor at the time was, the orientation of the video camera is determined based on the sequentially stored position information in the storage means, the control
Means to order the video camera in this determined orientation.
Since it is pointed next, the situation of each flame and the situation of the whole fire can be known comprehensively. Also, by automatically expanding the imaging range (angle of view) of the surveillance video camera,
The fire situation in the monitoring area can be known comprehensively.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, an embodiment of a fire monitoring device that by the present invention in conjunction with the accompanying drawings. First, a description will be given of a structure of a sensor unit having a surveillance video cameras and fire detection sensor in FIGS. 1 is a side view and FIG. 2 is a front view. In these figures, reference numeral 1 denotes a fire detection sensor for detecting radiation emitted from a fire monitoring area, and is installed on a base 2. This fire detection sensor 1 has a detection window 3 directed toward the fire monitoring area.
Is provided, and is driven to rotate in a horizontal scanning direction by a horizontal scanning drive motor (not shown) provided inside the base 2, so that a later-described fire detection mechanism provided inside the detection window 3 is provided. Scans the fire monitoring area.

Reference numeral 4 denotes a video camera, which is instructed by a drive unit 6 installed at the upper end of an L-shaped instruction post 5 fixed to the base 2. Then, by appropriately rotating the video camera 4 in the vertical and horizontal directions with a drive motor described later provided in the drive unit 6, an appropriate area of the fire monitoring area can be imaged. I have. FIG.
Indicates the internal structure of the fire detection sensor 1. In the figure,
A rotating mirror 8 that is rotated by a drive motor 7 at a constant angular velocity α is provided inside the fire detection sensor 1 facing the detection window 3 provided in the fire detection sensor 1. The light is reflected to the reflection mirror 10 via the lens 9.

The reflecting mirror 10 further includes an optical slit 11
Then, the light is reflected toward the relay lens 12 and received by the photoelectric element 13. A drive motor (not shown) installed inside the base 2 drives the entire fire detection sensor 1 for a predetermined period Th.
The scanning motor rotates in the horizontal scanning direction X by a constant scanning angle Δθx every time, and the driving motor 7
By one rotation of the vertical scanning direction Y, to achieve vertical and horizontal scanning of the monitored area 14. The angle range in which the rotating mirror 3 can receive light at the same time is Δθy in the vertical scanning direction Y and Δθx in the horizontal scanning direction.
The range monitored by one vertical scan is a vertical monitoring area AR indicated by oblique lines in FIG.

FIG. 3 shows a control mechanism for driving such a sensor unit and determining the presence or absence of a fire. In the figure, 4 is a video camera, 7 is a drive motor for rotating the rotating mirror 8, 13 is a photoelectric conversion element built in the fire detection sensor 1, and 15 is a fire sensor provided in the base 2. A drive motor for rotating the detection sensor 1 in the horizontal scanning direction X, 16 is a drive motor provided in the drive unit 6 for rotating the video camera 4 in the vertical direction Y, and 17 is provided in the drive unit 6 Video camera 4
Is a drive motor for rotating in the horizontal direction X.

The driving motor 7 is rotated at a predetermined angular velocity α by a constant power supplied from the vertical scanning driving unit 18,
The vertical scanning drive unit 18 supplies power according to a control signal CV1 from the detection unit drive control unit 19. Reference numeral 20 denotes a vertical scanning angle detection unit which detects the rotation angle of the drive motor 7 one by one and supplies a signal CV2 of the detected angle to the detection unit drive control unit 19. Then, the detection unit drive control unit 19 performs feedback control by the control signal CV1 so that the detection signal CV2 becomes constant, and operates the rotating mirror 8 at a constant angular velocity α.

The drive motor 15 is rotated by a drive signal supplied from a horizontal scanning drive unit 19. That is, the horizontal scanning drive unit 21 power-amplifies the horizontal synchronization pulse signal CH1 of the predetermined cycle Th output from the detection unit drive control unit 19, and the drive motor 15 rotates in synchronization with the power-amplified drive signal. Reference numeral 22 denotes a horizontal scanning angle detecting unit which detects a horizontal scanning angle of the drive motor 15 and outputs a detection signal CH.
2 is supplied to the detection unit drive control unit 19.

The detection unit drive control unit 19 determines the scanning position of the fire detection sensor 1 one by one from the detection signals CV2 and CH2, and scans the scanning position data D (θx , Θy) to the central control unit 23. On the other hand, the central control unit 23 includes the detection unit drive control unit 1
9 to supply a synchronization signal to the fire detection sensor 1.
Is controlled intensively.

Reference numeral 24 denotes a vertical drive unit for rotating and driving the drive motor 16. The vertical drive unit 24 amplifies the power of the vertical synchronization pulse signal SV 1 supplied from the ITV drive control unit 25 and supplies it to the drive motor 16 so that the vertical synchronization is achieved. The video camera 4 is rotated in the vertical direction by an angle corresponding to the pulse number of the pulse SV1. Reference numeral 26 denotes a vertical rotation angle detection unit which detects the angle βy at which the video camera 4 has actually rotated in the vertical direction, and supplies a detection signal SV2 to the ITV drive control unit 25.

Reference numeral 27 denotes a horizontal drive unit for rotationally driving the drive motor 17. The horizontal drive unit 17 amplifies the power of the horizontal synchronization pulse signal SH 1 supplied from the ITV drive control unit 25 and supplies the amplified signal to the drive motor 17. The video camera 4 is rotated in the horizontal direction by an angle corresponding to the pulse number of the pulse SH1. Reference numeral 28 denotes a horizontal rotation angle detection unit which detects the angle βx at which the video camera 4 has actually rotated in the horizontal direction, and supplies a detection signal SH2 to the ITV drive control unit 25.

Then, the ITV drive control unit 25 sets the imaging direction of the video camera 4 by outputting the vertical synchronizing pulse signal SV1 and the horizontal synchronizing pulse SH1, and further judges from the actual detection signals SV1 and SH2. The position data P (βx, βy) indicating the imaging direction of the video camera 4 is supplied to the central control unit 23. Further, the central control unit 23 receives the detection signal S (t) detected by the photoelectric conversion element 13 and
The presence or absence of a fire is determined by a fire determination circuit provided inside. This fire judgment circuit compares a predetermined threshold value Vth with the level of the detection signal S (t), and
When ≧ Vth, it is determined that a fire has occurred, and conversely, when S (t) <Vth, it is determined that there is no fire.

Reference numeral 29 denotes a storage unit formed of, for example, a semiconductor memory (RAM), and stores data D (θx, θy) indicating a scanning position at the time when the fire determination circuit determines that a fire has occurred. An operation unit 30 includes operation buttons and the like for selecting various operation modes for the central control unit 23. That is, at least an operation button for instructing the fire detection sensor 1 to start scanning, an operation button for specifying the imaging direction of the video camera 4, an operation button for specifying the imaging magnification (zoom) of the video camera 4, An automatic setting button for automatically performing a fire monitoring operation, a setting button for designating a so-called manual operation, and the like are provided. Then, the central control unit 23 determines the selection of these operation buttons, and performs a fire monitoring operation according to each selected content.

Reference numeral 31 denotes a video signal I from the video camera 4.
This is a monitor television that receives M and displays an image of a monitoring area. In addition, the central control unit 23 has a built-in device having an operation determination function such as a microcomputer,
A predetermined process is performed in synchronization with the process of the computer program. When the automatic setting button of the operation unit 30 is set, an automatic process for automatically driving the video camera 4 and displaying an image on the monitor television 31 to be described later is performed. When the manual operation button is set, Processing according to a manual operation by an operator is performed.

Next, the operation of the embodiment having such a configuration will be described with reference to FIGS. First, when the monitoring start button of the operation unit 30 is turned on, an initialization process is performed in step 100. That is, the central control unit 23 transfers the initialization data indicating the scanning reference point to the detection unit drive control unit 19. In response, the detection unit drive control unit 19 sends a control signal to the vertical scan drive unit 18 and the horizontal scan drive unit 21 to specify a reference point for scanning (the lower left position Q of the monitoring area 14 shown in FIG. 2). CV1 and CH1 are output, and the drive motors 7 and 15 rotate according to these signals, and the fire detection sensor 1
In the direction of the reference point Q.

Further, the central control unit 23 transfers initialization data for directing the video camera 4 in a predetermined directional direction (for example, the center direction of the fire monitoring area) to the ITV drive control unit 25. In response, the ITV drive control unit 25 supplies the vertical drive unit 24 and the horizontal drive unit 27 with the vertical and horizontal signals SV1 and SH1 indicating the designated direction, and
By driving the cameras 6 and 17, the video camera 4 is pointed in the designated direction, and the captured image is displayed on the monitor television 31.

Next, in step 110, the rotating mirror 8 is rotated at a predetermined angular velocity α, and at the same time, the vertical scanning angle detecting section 20 detects the actual rotating angle θy of the rotating mirror 8 in the vertical scanning direction Y, The scanning angle detection unit 22 detects the actual rotation angle θx of the fire detection sensor 1 in the horizontal scanning direction X. Further, during this scanning, the photoelectric conversion element 13 receives the radiation light from the scanning area.

Next, at step 120, the central control unit 23 judges whether a fire has occurred by comparing the detection signal S (t) with the threshold value Vth one by one. If it is determined that the fire is not a fire, the process proceeds to step 130, and the rotation angle θy of the rotating mirror 8 is set to the maximum vertical scanable angle θy.
It is determined whether or not m has been reached. If θy <θym, the process proceeds to step 11 to repeat the vertical scanning.

On the other hand, in step 130, θy = θy
If the distance has reached m, the processing has proceeded to step 140 since the vertical scanning range has been reached, and the drive motor 15 is driven to rotate the fire detection sensor 1 in the horizontal scanning direction X by a predetermined angle ΔθX. Further, in step 150, it is determined whether or not the rotation angle θx of the detection sensor 1 has reached the maximum rotation angle θxm in the horizontal scanning direction X. If θx <θxm, the process proceeds to step 110, where θx = θxm
In this case, since the entire monitoring area has been scanned, the process proceeds to step 160, where the detection sensor 1 and the rotating mirror 8 are again directed to the reference point Q, and the processing from step 110 is repeated.

By repeating the processing of steps 100 to 160, the monitoring area 14 is repeatedly scanned. While performing such a scan, step 1
When the occurrence of a fire is detected in step 20, the processing shifts to step 170 by interruption processing. That is, in step 170, the detection unit drive control unit 19 compares the detection signal CV2 output from the vertical scanning angle detection unit 20 and the detection signal CH2 output from the horizontal scanning angle detection unit 22 during the vertical and horizontal scanning. Input and their detection signals CV2, CH2
D (θx, θ) indicating the fire occurrence position corresponding to
y) is transferred to the central control unit 23, and the central control unit 23 stores the data D (θx, θy) in the storage unit 29. Then, the process returns to step 130 to continue scanning from the next scanning area.

In this scanning for fire detection, even if one fire is detected, the fire is detected without stopping, so if a plurality of flames are detected, data indicating the respective flame occurrence positions are detected. D (θx, θy) are stored in the storage unit 29 in the order in which they are detected. Further, a fire notification routine in the central control unit 23 is started from the time when the first fire is detected, and is processed in parallel with the scanning routine of steps 100 to 170. FIG. 5 is a flowchart showing a fire notification routine.

First, in step 200 of FIG. 5, all the monitoring areas 1 including the scanning area where the first fire was detected are set.
When it is confirmed that the scanning of Step 4 has been completed (it is confirmed that the process of Step 160 has been completed), the process proceeds to Step 210. That is, in step 200, the monitoring area 1
4. Wait for the completion of scanning of the whole to confirm the presence or absence of a plurality of flames.

In step 210, the central control unit 23 stores data D (θx, θy) indicating the position of the flame from the storage unit 29.
Is read, and the directivity of the video camera is determined based on the data D (θx, θy). That is, the video camera 4
Is determined in advance, and the directional direction is determined such that the surroundings around the flame are included in this angle of view. In order to make this determination, if data D (θx, θy) indicating a plurality of flame occurrence positions is obtained,
Data for each position that is close to each other and that falls within a predetermined angle of view is collected, and the center position thereof is determined as the directivity direction.

When it is not possible to image all fires simultaneously in one direction, as shown in FIG.
A plurality of sets A, B, and C are clustered for each set of data at positions close to each other, and a central position is obtained for each set A, B, and C to determine a plurality of pointing directions. And
The data in each of the determined directional directions is temporarily stored in an internal register or the like in order.

Next, in steps 220 and 230, the central control unit 23 stores the data indicating the first directivity
The video camera 4 is transferred to the TV drive control unit 25, and the drive of the drive motors 16 and 17 directs the video camera 4 in a designated direction. Then, the table on the monitor television 31 and the flame and video around the captures an image at step 240
Shows to. Note that imaging in this one directional direction is performed for a fixed period Tm, and when the period Tm elapses, step 2 is performed.
At 50 and 260, a process for pointing the video camera 4 in the next pointing direction is performed.

In step 250, the central control unit 23 determines whether or not imaging in all the determined directional directions has been completed.
Is determined, the process is terminated when the process is completed, and when the process is not completed, the process proceeds to step 260, where the central control unit 2
3 reads the data in the next direction from the internal register or the like, and repeats the processing from step 220. Therefore,
The next flame and the surrounding fire status are displayed on the monitor television 31.

[0036] In this way, the table on the monitor television 31 also sequentially taken every predetermined period Tm for a plurality of flame generation
Shows to. Then, when a series of imaging is completed, the processing starts again from step 200 for the next position data D (θx, θy) detected by the parallel processing of the scanning routines of steps 100 to 170 during this imaging operation. , Fire changes every time to monitor television 31
Will be displayed .

As described above, according to this embodiment, when a plurality of fires occur in the monitoring area or when a fire spreads due to a flying fire or the like, the video camera is linked with the fire detection by the fire detection sensor. 4 sequentially captures the fire occurrence site and displays it on the monitor television 31, so that the fire situation can be accurately grasped. In the above-described embodiment, the rotating mirror 8 is driven as a fire detection sensor to scan the monitoring area. However, as another example, an image is captured by a two-dimensional image sensor such as a CCD and output from the image sensor. The video signal to be applied may be applied to the fire determination.

That is, an image pickup optical system of a two-dimensional image sensor is installed facing the monitoring area to perform image pickup, and a video signal output from the image sensor at a scan detection cycle of a standard television system such as the NTSC system. May be processed as a detection signal to detect a fire. Furthermore, in the above description, the case where the central control unit 23 automatically switches the direction of the video camera 4 has been described.
In 10, a manual control may be performed such that the fire supplement occurrence position is displayed on the monitor television 31, and the imaging position is sequentially switched each time the manager or the like designates the operation button. In this case, the imaging period T in step 240
m is released, and processing is performed in synchronization with the operation of the operation button.

[0039] Also, fire previously stores the position data in the storage unit 29 of the area made to occur the most dangerous condition, the position by the detection of a fire data D ([theta] x, [theta] y)
Is the danger zone, the position data D
The priority of imaging may be set in accordance with the order of the danger levels so that the range including (θx, θy) is imaged first. For example, places such as pillars and walls where fire spreads easily, evacuation routes and doorways are given top priority. In this way, quick evacuation guidance can be dealt with.

Further, the direction of the video camera 4 is automatically set at the position where the degree of danger is highest, and the imaging is continued while maintaining the state, and the direction of the video camera 4 is directed to the next flame occurrence place. The control may be performed sequentially by operating a predetermined operation button of the operation unit 30. Furthermore, when the pointing direction of the video camera 4 is designated by a manual operation from the operation unit 30, the automatic processing may be interrupted to capture an image of the designated position, and when the designation is released, the automatic processing may be switched again. By doing so, it is possible to surely confirm the fire situation and the like.

Furthermore, when flames are detected at a plurality of locations, so-called zoom-down may be set so that the angle of view of the video camera 4 is maximized, and the entire monitoring area 14 may be imaged simultaneously. . In this way, the overall situation of the fire can be grasped. Furthermore, when a fire has occurred at a plurality of locations, the number of locations where the fire occurred and a display indicating that a flame has occurred at a plurality of locations may be displayed on the monitor television 31 to notify the scale of the fire. Good.

[0042]

As described above, according to the present invention, even when a plurality of fire disasters occur in the monitoring area, the position data corresponding to each scanning area where the fire detection sensor detects the flame is stored in the storage means. and, since the display image in the direction of the scanning area corresponding to the position data of the respective by directing surveillance video cameras in a predetermined order on the monitor television job down, overall the status of the entire situation and fire the fire You can know. Also, by automatically expanding the imaging range (angle of view) of the surveillance video camera , it is possible to comprehensively know the fire situation in the surveillance area.

[Brief description of the drawings]

FIG. 1 is a side view and a front view showing a structure of a sensor unit according to an embodiment of the present invention.

FIG. 2 is a structural explanatory view showing a structure and a function of a fire detection sensor in the sensor unit of FIG. 1;

FIG. 3 is a block diagram showing a control mechanism of one embodiment.

FIG. 4 is a flowchart illustrating the operation of a scanning routine according to an embodiment.

FIG. 5 is a flowchart illustrating an operation of a fire notification routine according to one embodiment.

FIG. 6 is a diagram illustrating a case where a plurality of fires occur in a monitoring area according to an embodiment.

[Explanation of symbols]

 4; video camera 7, 15, 16, 17; drive motor 8; rotating mirror 13; photoelectric conversion element 18; vertical scan drive unit 19; detection unit drive control unit 20; vertical scan angle detection unit 21; Horizontal scanning detection unit 23; central control unit 24; vertical drive unit 25; ITV drive control unit 26; vertical rotation angle detection unit 27; horizontal drive unit 28; horizontal rotation angle detection unit 29; storage unit 30; operation unit 31; Monitor television

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Koji Akiha 2-10-43, Kami-Osaki, Shinagawa-ku, Tokyo Within Hochiki Co., Ltd. (72) Inventor Kazumasa Shimizu 75-1, Hasunumacho, Itabashi-ku, Tokyo Shares (72) Inventor Toshiaki Yoshizaki 75-1 Hasunuma-cho, Itabashi-ku, Tokyo Topcon, Inc. (56) References JP-A-62-285198 (JP, A)

Claims (6)

(57) [Claims] 1. A and fire detection sensor for detecting the flame of the fire monitoring area by scanning a fire monitoring area, and determining means for determining a fire on the basis of the detection output from the fire sensor, the According to the judgment of fire occurrence by the judgment means
A video camera pointing in the direction of the flame position
A fire monitoring device having a monitor television for displaying an image captured by the camera , wherein the fire detection sensor completes scanning of the entire fire monitoring area.
By the time the judgment means judges that a fire has occurred
Storage means for sequentially storing the position information of the scanning area of the fire detection sensor at the time of determining the direction of the video camera based on the position information sequentially stored in the storage means ;
Fire monitoring device you wherein and a control means for sequentially directing the video camera. Wherein a fire detection sensor for detecting the flame of the fire monitoring area by scanning a fire monitoring area, and determining means for determining a fire on the basis of the detection output from the fire sensor, the According to the judgment of fire occurrence by the judgment means
A video camera pointing in the direction of the flame position
In a fire-monitoring device having a monitor television for displaying an image captured by a camera and operation means for setting various controls for fire monitoring, the fire detection sensor completes scanning of the entire fire-monitoring area.
By the time the judgment means judges that a fire has occurred
The position information of the scanning area of the fire detection sensor in order
Storage means for storing, and the video data based on the position information sequentially stored in the storage means.
Determine the direction of the video camera, and manually operate
Each time an instruction is given by the operation,
Control means for sequentially pointing the video camera.
Fire monitoring device and wherein the door. 3. The control means according to claim 2, wherein said control means stores a plurality of places in said storage means.
If the location information is stored,
Data for each of the nearby positions that fall within the angle of view of
The center position is determined as the pointing direction.
Motomeko 1 or claim 2 fire monitoring device as claimed. 4. The control unit according to claim 1, wherein the control unit is configured to control a risk zone in a monitoring area in advance.
Area, and of the position information stored in the storage means,
Giving priority to the position corresponding to the dangerous area,
Characterized in that for successively directing claim 1 or claim
Fire monitoring device in claim 2, wherein. 5. The control means according to claim 1 , wherein
A special feature is that the video camera is pointed sequentially at predetermined time intervals.
Fire monitoring apparatus according to claim 1, symptoms. 6. The method according to claim 6 , wherein the scanning is performed within the fire monitoring area.
A fire detection sensor for detecting a flame in the disaster monitoring area;
Judgment of fire occurrence based on detection output from disaster detection sensor
Determining means for determining the occurrence of a fire by the determining means.
A video camera pointing in the direction of the flame position
A monitor television that displays the images captured by the camera
The in fire monitoring apparatus having the scanning of the entire fire monitoring area by the fire detection sensor Kan
By the time the judgment means judges that a fire has occurred
The position information of the scanning area of the fire detection sensor in order
Storage means for storing, and when a plurality of pieces of position information are stored in the storage means,
Expands the angle of view of the video camera and
Fire monitoring device comprising:
Place.