JPH09167287A - Monitoring device for prevention of urban disaster - Google Patents

Abstract

PROBLEM TO BE SOLVED: To automatically detect the occurrence of a fire and also to easily specify the place of the fire. SOLUTION: A camera base 3 is set on the roof 9 of a building, and an infrared camera 2 is contained in a camera housing 1 which is attached to a turntable 4 placed on the base 3. The photographing direction of the camera 2 is changed by the turntable 4 and these changing angles of the camera 2 are monitored, thereby, the infrared image of a prescribed area can be photographed in a city. Then the arithmetic processing is applied to the infrared image signals, so that a local heat source is recognized for detection of the place of a fire. The place of the fire also can be specified based on the photographing direction of the camera 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a monitoring device for disaster prevention in an urban area, which captures an image of a city with a monitoring camera and detects the occurrence of a fire by image processing.

[0002]

2. Description of the Related Art Conventionally, in order to monitor a disaster occurring in a city, a visible light camera is mainly installed as a monitoring camera on the roof of a building. The camera is turned up and down or left and right according to an automatic or manual command, and an image of the object to be monitored is checked by an observer when necessary. In a large city where the buildings are extremely high-rise, it is necessary to monitor from a high place, such as the roof of a tall building, to allow a wide view.

A prior art for monitoring a predetermined warning area by using a visible light television camera, recognizing a fire from a monitoring image, and outputting fire detection information is disclosed, for example, in Japanese Patent Laid-Open No. 5-2.
No. 0559. In this prior art, a television camera is provided in each of a plurality of warning areas, and a flame portion due to a fire is extracted and recognized from a luminance signal of an image while being intensively monitored. Japanese Patent Application Laid-Open No. 4-167199 discloses a prior art in which an infrared camera and a visible light camera are used for monitoring in order to detect a fire occurrence in a pit of a refuse incineration plant. Infrared cameras detect the temperature distribution on the surface of the debris layer and visible light cameras are used to detect the generation of smoke. Further, Japanese Patent Laid-Open No. 3-186274 discloses a prior art in which a pair of infrared cameras detects a fire position of a combustible substance such as dust and automatically extinguishes the fire. The fire position is calculated from the scanning direction of each camera.

[0004]

Problems to be Solved by the Invention
In Japanese Patent Application Laid-Open No. 4-167199, the image pickup area of the camera is fixed, and it is possible to detect the occurrence of fire only in a narrow range to some extent. JP-A-3-186274
In the prior art, a fire position is detected from an imaging direction of an infrared camera. The range in which the infrared camera scans is limited to the range within which water can be discharged from the automatic fire extinguisher, and similarly, only a narrow range of fire occurrence can be detected.

In the prior art in which a camera for visible light is installed on the roof of a building and the image of the object to be monitored is checked by a surveillance staff,
For nighttime fires, etc., it is not possible to detect swiftly unless an observer constantly looks at the images. If the discovery is delayed, the initial fire-fighting activity will be delayed and the possibility of fire spread.
Moreover, even if a fire outbreak can be confirmed from the surveillance image, it is not possible to automatically identify the fire outbreak site, so it is necessary for the surveillance staff to estimate the place while looking at the images of other places. is there. Furthermore, January 17, 1995
When there is a power outage or water outage at the camera installation site, such as the Great Hanshin Earthquake in the day, even if there is an emergency power supply, the water-cooled prime mover cannot be used and the disaster situation of the city can be checked with the monitoring camera. You will not be able to do it.

An object of the present invention is to provide a monitoring device for urban disaster prevention which can automatically detect a fire, can easily identify the place where the fire has occurred, and can monitor the power supply in an emergency. Is to provide.

[0007]

According to a first aspect of the present invention, an infrared camera for taking an image with infrared light and an infrared camera are held at a high place where a city can be viewed, and the direction of the infrared camera is taken. A camera stand that swivels and displaces in a substantially horizontal plane and angularly displaces the imaging direction of the infrared camera in a substantially vertical plane, and the camera stand is driven according to a predetermined program, and the infrared camera can be used to Includes control means for controlling the area to be imaged and monitoring means for responding to the image output imaged by the infrared camera and determining that the heat source is the place where the fire occurs when a local heat source is detected. This is an urban disaster prevention monitoring device. According to the present invention, an infrared camera for imaging with infrared light is installed at a high place. According to the program set in the control means by the control means, the infrared camera is capable of turning and displacing in a substantially horizontal plane and angularly displacing in a substantially vertical plane to image an area within a predetermined range of the city. . The monitoring means determines that a fire has occurred if a local heat source is detected during the output of the image captured by the infrared camera.

Further, the control means of the present invention according to claim 2 responds to the output from the monitoring means so that, when it is judged that a fire has occurred, the infrared camera picks up the imaging direction toward the fire occurrence place. It is characterized by controlling. According to the present invention, the control means directs the imaging direction of the infrared camera toward the fire occurrence location when the monitoring means determines that a fire has occurred. If the imaging direction of the infrared camera is specified, it is possible to easily specify where in the city the fire is occurring.

The monitoring means of the present invention according to claim 3 calculates the fire occurrence location from the map data of the city stored in advance and the imaging direction of the infrared camera, and displays the image in comparison with the map of the city. It is characterized by doing. According to the invention, the monitoring means displays the image of the fire occurrence place calculated from the imaging direction in comparison with the map of the city, so that the fire occurrence place can be easily recognized and a quick rescue operation can be performed.
Such a map display can be realized by an application program stored in a storage medium such as a CD-ROM or EP-ROM, and more specifically, a background display called a wallpaper or the like is imaged on the display screen. A map image corresponding to each area may be displayed, and a field of view being captured by the camera may be displayed as a frame on the map image.

Further, the monitoring means of the present invention according to claim 4 is such that the installation position of each infrared camera is a triangle of 2 on a plane, based on the image output of the fire occurrence place taken by the two infrared cameras. When it is set as a point, when one local heat source simultaneously detected by each infrared camera becomes one remaining point of the triangle on the plane, it is determined that the heat source is a fire occurrence place. . According to the present invention, in identifying the fire occurrence location, the monitoring means sets the installation positions of the respective infrared cameras to two triangular points on the horizontal plane based on the image output captured by the two infrared cameras at the same time. 1 detected by infrared camera
When one heat source is one of the remaining points of the triangle on the horizontal plane, the heat source is determined to be the place where the fire occurred. Specifically, the installation position of each infrared camera is two points of a triangle on the horizontal plane, and the calculation as to whether or not the heat source detected by each infrared camera is the remaining one point of the triangle on the horizontal plane is performed. For example, it can be easily obtained by performing a well-known triangulation operation or a geometric operation using a trigonometric function. In this way, when the installation positions of the two infrared cameras are two triangular points and the remaining one point is the heat source, it is determined that the heat source is the place where the fire occurs, so it passes through the heat source. It is possible to accurately find the fire occurrence location regardless of the angle formed by the infrared camera with respect to the horizontal plane, and to specify the fire occurrence location with high accuracy.

According to a fifth aspect of the present invention, the monitoring means comprises:
Based on the image output taken by the infrared camera,
The number and position of heat sources other than fire are stored in advance, the heat source detected by the infrared camera is compared with the stored heat source, and when the detected heat source is other than the stored heat source, the It is characterized in that the detected heat source is judged to be a fire occurrence place. According to the present invention, the monitoring means is stored in advance with the active position of the heat source other than the fire based on the output of the image captured by the infrared camera, and the subsequently detected heat source is other than the stored heat source. At some point, the detected heat source is determined to be the place where the fire occurred, so it is possible to easily identify the place where the fire has occurred, prevent misjudgment, and identify the place where the fire has occurred quickly and reliably. It becomes possible.

The present invention according to claim 6 is characterized by comprising a generator with a motor capable of operating in the event of a power failure. According to the present invention, even if a power failure occurs, the power generator with a prime mover is provided, so that the power required for monitoring can be obtained. In the event of a major disaster, commercial power is often cut off, resulting in a power failure, and even if a power failure occurs, it is possible to reliably monitor the power failure.

According to a seventh aspect of the present invention, the prime mover-equipped generator is air-cooled. According to the present invention, since the generator with a motor is an air-cooled type, even if cooling water cannot be obtained due to a disaster, it is possible to reliably generate power and continue monitoring by images.

Further, the present invention according to claim 8 is characterized by comprising a wireless transmission means capable of wirelessly transmitting a signal representing an instruction to the control means and an image captured by the infrared camera. According to the present invention, since the image captured by the infrared camera and the control instruction can be transmitted wirelessly, the infrared camera is installed at a position effective for monitoring the city, and the captured image is processed. Can be done in remote areas. Also, since the signal is transmitted by wireless transmission,
Even if a major disaster occurs, reliable signal transmission can be performed.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows the basic configuration of an embodiment of the present invention. FIG. 1A shows the installation status of the surveillance camera, and FIG. 1B shows the appearance of the surveillance panel. The surveillance camera has an infrared camera 2 housed in a camera housing 1 and mounted on a swivel base 4 above a camera base 3. The swivel base 4 swivels the camera housing 1 in a horizontal plane and a vertical plane, changes the imaging direction of the infrared camera 2, and images each area in the city. The camera stand 3 is provided on a rooftop 9 of a building such as a building. An emergency power supply 6 with a prime mover is installed adjacent to the camera installation base 5 and is prepared for a power failure. An antenna 7 is provided on the base 5 for installing the camera together with the camera base 3 so that an image taken at a remote place can be wirelessly transmitted. The monitoring device 8 shown in FIG. 1B is provided, for example, in the building shown in FIG. In this case, signal transmission between the infrared camera 2 and the monitoring device 8 is performed via a signal cable.

2 and 3 show the structure of the swivel base 4 of FIG. FIG. 2 is a front sectional view, and FIG. 3 is a right side view. A visible color camera 10 is mounted in the camera housing 1 together with the infrared camera 2 so that infrared light and visible light can be simultaneously imaged. The camera housing 1 is mounted on the upper part of the swivel base 4 via the camera mount 11. The camera mount 11 can be swiveled in a substantially horizontal plane by a motor 12 mounted on the swivel 4. The rotation angle of the motor 12 is detected by an angle detector 13. The rotation axis of the motor 12 is reduced by the speed reducer 14, and the rotation direction is changed by 90 ° to drive the left and right turning shaft 15 to rotate. The left and right turning shaft 15 turns the camera mount 11 in a horizontal plane.

A motor 16 is provided on the camera mount 11, and its rotation angle is detected by an angle detector 17. The rotation axis of the motor 16 is 90 °
The camera housing 1 can be angularly displaced, and the direction of the camera housing 1 can be angularly displaced in a substantially vertical plane.

FIG. 4 shows a schematic electrical configuration of the embodiment of FIG. The control device 20 is provided, for example, in the camera base 3 of FIG. 1, and includes a camera control unit 21 and a swivel base control unit 2.
2, an infrared camera control unit 23, a visible color camera control unit 24, a power supply 25 and a transmission control unit 26. The swivel control unit 22 drives the motor 12 and the motor 16 to rotate the swivel in the horizontal plane and the vertical plane, respectively. Further, the turning angle is monitored by the outputs from the angle detector 13 and the angle detector 17.
The infrared camera control unit 23 controls the focus and gain or zoom of the infrared camera 2. The visible color camera control unit 24 controls the focus and zoom of the visible color camera 10. The power supply 25 is normally supplied with necessary power from a commercial external power supply, but is supplied with power from a power source with a motor 6 provided outdoors in the event of a power failure or the like. Control of these units is automatically performed by the camera control unit 21. The transmission control unit 26 transmits the image signals captured by the infrared camera 2 and the visible color camera 10 via the image signal lines 31 and 32 for two channels (ch) of the transmission cable 30. The transmission cable 30 also includes a command signal line 33. The command signal line 33 is used to transmit command signals to the swivel controller 22, the infrared camera controller 23, and the visible color camera controller 24.
In the transmission cable 30, a monitor signal line 34 is further provided.
Is included, and a turning angle monitor signal is sent from the turning base control unit 22.

The transmission cable 30 is connected to the monitoring device 8. In the monitoring device 8, a display unit 40, an operation unit 41, a monitoring calculation unit 42, a power source 43, a program search command unit 4
4, a manual search command unit 45, an infrared camera control command unit 46, a visible color camera control command unit 47, and a transmission control unit 48 are included. The display section 40 includes a monitor television screen, the visible color camera 10 and the infrared camera 2.
Video Recorder (VTR) that records images from
And a time generator that records the date and time (TG
R) and the like are included. The operation unit 41 includes a joystick, a keyboard, and the like. The monitoring calculation unit 42 includes
Calculation processing such as map creation, infrared image processing, and fire alarm is performed. The power supply 43 is normally supplied with electric power from a commercial power supply, and can automatically start up the external power supply 6 in the event of a power outage to receive the generated electric power.

The program search command section 44 generates a command signal for changing the turning angle of the swivel base 4 in accordance with a preset program. Manual search command section 45
Generates a command signal for changing the turning angle of the turntable 4 in accordance with a command input via the operation unit 41. The infrared camera control command section 46 generates a command signal for focus and gain or zoom to be given to the infrared camera control section 23. The visible color camera control command unit 47
A signal for a focus and zoom command to the visible color camera control unit 24 is generated. The transmission control unit 48 sends a command signal to the control device 20 via the command signal line 33, receives the image signal via the image signal lines 31 and 32, and receives the image signal via the monitor signal line 34. Receive a turning angle monitor signal from.

FIG. 5 shows the operation of automatically monitoring a fire with the configuration of FIG. Automatic fire monitoring is started from step a1, and infrared images are acquired by program search of a predetermined monitoring area of the city in step a2. At step a3, the image signal is transmitted from the control device 20 to the monitoring device 8 via the transmission cable 30. At step a4, the monitoring calculation unit 42 in the monitoring device 8
The high-intensity part barycentric coordinate calculation is performed by binarized image processing.
In step a5, the pointing of the surveillance camera toward the fire center and the swivel pointing angle data are obtained by tracking the center of gravity of the binarized image. At step a6, an alarm for attracting the attention of the observer and a fire area display on the operation panel are displayed. Step a
At 7, the monitor who receives the alarm confirms the monitor image to identify the fire and ends the operation.

FIG. 6 shows the progress of image processing corresponding to the operation of FIG. It is assumed that a fire occurrence place 51 is included in the monitoring image 50 in FIG. For example, when the camera is turning left, the luminance of the scanning line indicated by AA changes as shown in FIG. That is, the distribution of the luminance 52 represented by the voltage value has a portion exceeding the preset threshold level 53. A high-luminance part is detected for each horizontal scanning line A-A, and an image converted into a two-dimensional binarized image by image processing is, for example, as shown in FIG. 6C. The center of the screen is the camera-oriented center 54, and the high-intensity part 55 has Δx in the horizontal direction and Δx in the vertical direction.
It is displaced by y. When the camera is controlled so that this displacement becomes 0, the camera pointing center 54 is in the state shown in FIG. In this way, the fire occurrence location 51 of FIG. 6A can be specified from the vertical / horizontal angle data of the camera corresponding to the binarized image when the camera is directed to the high-luminance portion.

FIG. 7 shows the overall construction of an urban disaster prevention monitoring device according to another embodiment of the present invention. A monitoring control panel 61 is provided in a monitoring headquarters 60 installed at a fire station in a city, and is monitored by a monitoring person 62. The monitoring headquarters 60 receives an infrared image signal corresponding to the field of view 66 from a rooftop monitoring station 65 provided on the rooftop of a tall building 64 in the city via the antenna 63. Further, an infrared image corresponding to a field of view 69 from a mountaintop monitoring station 68 provided when a mountain 67 is present near the city is also received. At the rooftop monitoring station 65 and the mountaintop monitoring station 68, the visual fields 66 and 69 of the infrared camera are turned to monitor the city over a wide area.

FIG. 8 shows a schematic electrical configuration of the monitoring device for urban disaster prevention shown in FIG. This structure is similar to the structure of FIG. 4, and corresponding parts are designated by the same reference numerals. It should be noted that the control device 70 provided at the rooftop monitoring station 65 or the mountaintop monitoring station 68 is provided with a power source monitoring unit 71, and when the external power source is in a power failure, the emergency battery 72 immediately backs up the power to prevent further power failure. When continuing, the command is to operate the emergency generator 73 to secure the supply of electric power. The image signal and the monitor signal from the control device 70 and the command signal from the monitoring control panel 61 are transmitted by wireless communication via the wireless transmission devices 74 and 75, respectively. In the monitoring control panel 61, the control device 7
0 is provided with a generator start / stop command unit 77 for remotely controlling start / stop of the emergency generator 73, and when the power failure recovery is delayed due to a large earthquake or the like, the emergency generator 7
Command to activate 3. Emergency generator 73
Preferably comprises an air-cooled prime mover. In the case of a water-cooled prime mover, if a water outage occurs during a major disaster, the prime mover cannot be cooled and monitoring cannot be continued.

As described above, by using the automatic start / stop type air-cooled type emergency generator 73 with a prime mover that can be remotely controlled, a monitoring image can be obtained even in the event of a power outage due to a large earthquake. can do. Further, even when the installation place of the infrared camera 2 is far from the monitoring place, the turntable 4 and the infrared camera 2 can be remotely operated by image transmission via wireless communication or the like.

FIG. 9 is a view showing a state in which a map is displayed on the display screen 81 by the monitoring device 8, and FIG. 9 (1) shows a display state including the entire image pickup area 82 by the infrared camera 2. (2) is the infrared camera 2 in the imaging area 82
2 shows a state in which the map of the installation position 83 and the area near the field of view 84 are enlarged and displayed. The monitoring device 8 is shown in FIG.
The fire occurrence location corresponding to the high-intensity part indicated by the reference numeral 55 in (c) is calculated from the pre-stored map data of the city and the imaging direction of the infrared camera 2, and the image is displayed in association with the map of the city. To be configured. This display screen 8
1, a map display area 85 on which the map is displayed, and a horizontal direction (left and right direction in FIG. 9) at the bottom of the map display area 85.
And a display selection area 86 extending to. The display of each of the areas 85 and 86 can be realized by a commercially available software program of a personal computer. More specifically, a window (Windows; product name)
Can be implemented as a background image called wallpaper. The program that stores such map data is
For example, the map is stored in a storage medium such as a CD-ROM or an EP-ROM, and the map display area 85 is displayed by selecting a map in a range including the installation position 83 of the infrared camera 2 and the imaging area 82 of the infrared camera 2. The map data further includes detailed map data of the enlarged area 87 including the vicinity of the field of view 84 being photographed by the infrared camera 2 and the camera installation position 83.

The display selection area 86 includes the installation position 83 of the infrared camera 2 and the entire imaging area 82 thereof.
From the display state shown in (1), a magnified display setting unit 88 for setting the magnified display of the magnified area 87 near the installation position 83 and the visual field 84, and the magnified display state set by the magnified display setting unit 88. To the original reduced display, and the display screen 81 is switched from the map display state shown in FIG. 9 to the captured image display state shown in FIG. 6A, or the captured image display is performed. A display switching setting unit 90 for switching from the state to the map display state is provided.

When it is desired to magnify and display the enlarged area 87 indicated by reference numeral 87 in FIG. 9 (1) on the entire map display area 85, for example, the enlarged display setting section 8 is used with a touch pen.
8 is set or the mouse pointer display is overlapped on the enlarged display setting unit 88 with the mouse to perform the setting operation, and as shown in FIG. 9 (2), the entire map display area 85 is enlarged as shown in FIG. 9 (1). Region 87 is shown enlarged. Since it is possible to switch between the wide area display and the enlarged display in this way, it is possible to confirm the geographical location of the fire occurrence location by the wide area map display shown in FIG. 9 (1). Then, as shown in FIG. 9 (2), an enlarged display can be performed to confirm a more specific position of the fire occurrence place and a road in the surrounding area. Further, since the installation position 83 of the infrared camera 2 is displayed in any of the display modes of FIG. 9 (1) and FIG. 9 (2), the positional relationship of the fire occurrence place with the installation position 83 of the infrared camera 2 as a reference. Can be easily grasped on the same screen, and the location of the fire can be identified at a glance.

As another embodiment of the present invention, various disaster rescue support information such as wind direction, wind speed, humidity, temperature, etc. is displayed in the map display area 85 or the display selection area 86 on the display screen 81 shown in FIG. May be displayed simultaneously.

The image pickup area 82 is displayed by a frame surrounding the image pickup area in response to the control signal from the infrared camera control section 23 of the control device 20, and the field of view 84 corresponds to the pointing direction of the infrared camera 2 and the swivel base. It is displayed by a frame that moves in the imaging area 82 based on a control signal from the control unit 22. When such a field of view 84 moves the imaging area 82 from, for example, the right end area in FIG. 9 (1) to the left end area, that is, in the clockwise direction, as shown in FIG. When the part is detected, the detected position is displayed by, for example, an X-shaped red blinking display 91, and the red blinking display portion 91 is configured to continue displaying until the visual field 84 passes and it is determined that it is not a heat source. That is, every time the infrared camera 2 scans the inside of the imaging area 82 from one end to the other end, or from the other end to the one end, the display of the fire occurrence location is incremented. When the detected brightness exceeds the threshold level 53, it is determined that the heat source is the place where the fire has occurred, and the display 91 is continuously kept blinking. If the brightness is less than or equal to the threshold level 53, the display 91 is erased.
In such a fire display 91, a plurality of threshold levels 53 are set in advance, and the brightness inputted as image information from the infrared camera 2 is judged step by step according to each level, and the fire occurrence scale, combustion temperature, and other fires are detected. The type may be determined stepwise.

Thus, in the embodiment shown in FIG. 9,
Since the map data is displayed as the background image of the display screen 81, the map can be easily changed, the time for changing the map can be shortened, and the load of the data amount of the personal computer can be greatly reduced. Therefore, it becomes possible to easily and accurately identify the location of the fire.

FIG. 10 is a plan view schematically showing still another embodiment of the present invention, and FIG. 11 is a side view seen from the lower side of FIG. In the present embodiment, the monitoring calculation unit 42 of the monitoring device 8 sets the fire occurrence location 51 on the basis of the image output captured by the two infrared cameras 2a and 2b, based on the set positions of the infrared cameras 2a and 2b. P1, P
When 2 is defined as two points of a triangle on the plane, it is calculated whether or not the local heat source detected by each infrared camera 2a, 2b becomes one of the remaining points of the triangle on the plane, When the calculation is established as the remaining one point, it is determined that the heat source is the place where the fire occurred.

Thus, the two infrared cameras 2a and 2b
Is used to prevent erroneous detection of intersections 96 and 97 of the directional center lines of the infrared cameras 2a and 2b indicated by virtual lines 93 and 94 in FIG. This is because. The distances L1 and L2 between the actual fire occurrence location 51 and the fire occurrence locations 96 and 97, which are erroneous detections on the ground surface 95, become smaller as the angles θ1 and θ2 formed by the infrared cameras 2a and 2b with respect to the horizontal plane become smaller. In other words, this is because it becomes longer as the position is closer to the horizontal, and it is possible to prevent a point far away from the actual fire occurrence place 51 from being erroneously determined to be the fire occurrence place.

At the intersection P3 of the directional center lines 93, 94 of the infrared cameras 2a, 2b, the longitude, latitude and altitude of the first infrared camera 2a are displayed in coordinates as P1 (x1, y).
1, z1), the longitude, latitude, and altitude of the second infrared camera 2a are displayed in coordinates as P2 (x2, y2, z2), and the longitude, latitude, and altitude of the fire occurrence location 51 are also displayed in coordinates as P3. If (x3, y3, z3), the position P1 (x1, y1, x1), P of each infrared camera 2a, 2b is set.
2 (x2, y2, z2) and the distance L3 between the positions P1 and P2 are known amounts, the infrared cameras 2a and 2b
The directional center lines 93 and 94 of are as high-intensity parts having a brightness exceeding the threshold level 53 on the detected image,
Position P3 (x3, y3, z3), which is the fire occurrence location 51
When the vehicle crosses, the internal angles α and β at the installation positions P1 and P2 of the infrared cameras 2a and 2b are obtained as data based on the signal for controlling the swivel base 4 from the control device 20. Therefore, between the positions P1 and P3. The distance L4 of is calculated by L4 = L3.sinβ / sin (α + β) (1), and the distance L5 between P2 and P3 is calculated by L5 = L3 · sinα / sin (α + β) (2) . When the distance L4 between the positions P1 and P3 and the distance L5 between the positions P2 and P3 are obtained in this way, the coordinates (x3, y3, z3) of the position P3 of the fire occurrence place 51 are then obtained by coordinate calculation. You can When the azimuth angles γ1 and γ2 are clockwise angles from the time to the directional centerlines 93 and 94, γ1 and γ2 are used for triangulation calculation, and similarly, the coordinates P3 (x3, y3) of the fire occurrence place 51 are calculated. , Z3) may be obtained.

In this way, the two infrared cameras 2a,
Since the fire occurrence place 51 can be specified by 2b, the fire position can be detected with higher accuracy than before the fire occurrence place is formed at the intersection with the ground surface 95 as shown by reference numerals 96 and 97 in FIG. Can be detected. Moreover, the monitoring time can be shortened by using two infrared cameras 2a and 2b. Further, since the two infrared cameras are used, it is possible to image the areas that are blind spots to each other, whereby each infrared camera 2a,
The blind spot of 2b is reduced and the monitoring range can be widened.

FIG. 12 is a simplified diagram showing an imaging area 82 of the infrared camera 2 showing still another embodiment of the present invention. In the present embodiment, the image signal picked up by the infrared camera 2 is subjected to image processing by the monitoring calculation unit 42 of the monitoring device 8, whereby the fire can be detected and the location of the fire can be specified. For example, when the field of view is moving in the order of reference symbols 84a, 84b, 84c during imaging, in order to determine whether or not there is a fire, a heat source other than a fire, such as a chimney of a steel mill or a mercury lamp, is present in the imaging range. When the heat source 101 is detected and stopped during the first one scan, the monitoring calculation unit 42 of the monitoring device 8 stores the number and the position of the heat source 101 based on the image output captured by the infrared camera 2. During the subsequent scanning, the heat source detected by the infrared camera 2 is compared with the stored heat source 101,
When the detected heat source is other than the stored heat source 101, it is determined that the detected heat source is a fire occurrence place.

In this way, by storing the heat source other than the fire in the monitor / calculation section 42 in advance, the infrared camera 2
Does not stop each time it detects a heat source, speeding up fire determination, and easily distinguishing between a heat source that always exists and a fire. Further, since the heat source detected by the infrared camera 2 can be distinguished from the heat source other than the fire that is always present, even if the infrared camera 2 is set to have a high sensitivity, it is easy to distinguish the fire from the other sources. The detection sensitivity of fire can be improved.

FIG. 13 is a diagram showing a display screen of still another embodiment of the present invention. FIG. 13 (1) shows a display state when a desired position for image pickup is inputted by mouse pointer display. 2) shows the display state when the image pickup area of the infrared camera 2 moves to the image pickup desired position. In the monitoring device 8, a pointer display 104 is displayed on the display screen 103 by a mouse or a touch panel, and a desired image pickup position displayed on the display screen 103 by operating the mouse or giving an instruction by the touch panel on the display screen 103, for example, By inputting the desired imaging position 105, which is considered to be a heat source due to a fire, the infrared camera 2
13 is moved to an image pickup position corresponding to the image pickup desired position 105, is displayed on the display screen 103 as shown in FIG. 13B, is stopped at the image pickup desired position 105, and continuous image pickup is performed. can do.

With such a configuration, as described above, it is possible to change the image pickup direction of the infrared camera 2 with a mouse in addition to the operation with the joystick. For example, when the fire position can be known only in a rough direction by a notification or the like, Although it is difficult to point the infrared camera 2 to the fire occurrence location, in the present embodiment, an arbitrary heat source displayed on the display screen 103 is designated by the mouse and the designated desired imaging position 105 is set. By pointing the infrared camera 2 at high speed, it is possible to quickly respond to ambiguous fire occurrence information and confirm the presence or absence of a fire.

According to each of the above embodiments, the infrared camera 2 is used as the surveillance camera, and the infrared camera 2 is installed on the electric swivel base 4. The angle detectors 13 and 17 detect the image pickup direction of the infrared camera 2 and create a search program for changing the vertical / horizontal angle for scanning the surveillance area in accordance with the installation location of the camera. If the swivel base 4 is servo-driven by a search program, an infrared image of the monitored area can be captured. When a fire occurs, the temperature of the flame and the temperature of the side of the building become significantly higher than the ambient temperature. Therefore, by controlling the image of the infrared camera 2, the center of the camera can be controlled to the center of the fire. The location of the fire can be identified from the angle of the camera. At the same time, it is possible to inform the observer by alarm. Further, by displaying the map of the city on the monitor for monitoring in comparison with the monitoring area of the camera, the location of the fire can be identified more easily and accurately.

In this way, by using the infrared camera 2 as a surveillance camera, a nighttime fire can be automatically detected, and its location can be easily specified. As the number of fires decreases, the initial fire extinguishing activities can be carried out smoothly, and the disaster can be prevented from spreading. Further, by using the visible color camera 10 in combination with the camera swivel base 4, not only nighttime monitoring but also daytime monitoring as usual can be performed. Furthermore, it is possible to easily construct a system for transmitting an image to a central government agency for wide-area disaster prevention by using satellite communication.

[0042]

As described above, according to the present invention as set forth in claim 1, the occurrence of fire can be detected from the heat source in the image captured by the infrared camera. Therefore, it is necessary for the surveillance staff to constantly monitor the image. No, and if a disaster occurs, it can be detected immediately. In particular, night fires can be automatically detected.

According to the second aspect of the present invention, when it is judged that a fire has occurred, the imaging direction of the infrared camera is directed toward the fire occurrence location, so that the fire occurrence can be confirmed or the location can be specified. It becomes possible to do.

According to the third aspect of the present invention, the fire occurrence location is displayed in comparison with the map stored in advance, so that the fire occurrence location can be easily specified.

According to the present invention as set forth in claim 4, since the fire occurrence place is specified by the two infrared cameras, the fire occurrence place can be accurately determined. Further, by using two infrared cameras, the blind spot of each infrared camera can be reduced and the reliability of monitoring can be improved.

According to the present invention of claim 5, the number and the position of the heat source of the fire damage are stored in advance by the monitoring means and compared with the heat source by the infrared camera thereafter.
When the detected heat source is other than the stored heat source, it is configured to judge that the detected heat source is the fire occurrence place, so that the fire occurrence place can be identified easily and surely, and the fire is highly reliable. The location of occurrence can be detected.

Further, according to the present invention as set forth in claim 6, even if a power failure occurs due to a disaster, since the generator with a motor is provided, it is possible to continue monitoring the disaster.

According to the seventh aspect of the present invention, since the generator with a prime mover is of the air-cooled type, it is possible to reliably monitor the disaster even if the water is cut off due to the disaster.

According to the present invention, the image captured by the infrared camera and the control signal to the infrared camera are wirelessly transmitted, so that the infrared camera is installed at a remote position effective for monitoring the city. Even if it becomes difficult to transmit a signal by wire due to a disaster, the signal can be transmitted reliably.

[Brief description of the drawings]

FIG. 1 is a side view and a perspective view showing a configuration of an embodiment of the present invention.

FIG. 2 is a front sectional view of the swivel base 4 of FIG.

FIG. 3 is a right side view of the swivel 4;

FIG. 4 is a block diagram showing a schematic electrical configuration of the embodiment of FIG. 1;

FIG. 5 is a flowchart showing the operation of the configuration of FIG. 4;

FIG. 6 is a diagram showing a progress state of image processing by the operation of FIG. 5;

FIG. 7 is a perspective view showing another embodiment of the present invention.

FIG. 8 is a block diagram showing a schematic electrical configuration of the embodiment of FIG. 7;

9 is a diagram showing a state in which a map is displayed on the display screen 81 by the monitoring device 8, and FIG. 9 (1) shows a display state including the entire imaging region 82 by the infrared camera 2, and FIG. ) Indicates a state where the map of the installation position 83 of the infrared camera 2 in the imaging area 82 and the area near the field of view 84 thereof is enlarged and displayed.

FIG. 10 is a plan view schematically showing still another embodiment of the present invention.

FIG. 11 is a side view seen from below in FIG.

FIG. 12 is a simplified diagram showing an imaging area 82 of an infrared camera 2 showing still another embodiment of the present invention.

FIG. 13 is a diagram showing a display screen of still another embodiment of the present invention, FIG. 13 (1) shows a display state when a desired imaging position is input by mouse pointer display, and FIG. Shows the display state when the image pickup area of the infrared camera 2 moves to the image pickup desired position.

[Explanation of symbols]

 1 camera housing 2 infrared camera 3 camera stand 4 swivel base 5 camera installation base 6 power supply with motor 7 antenna 8 monitoring device 9 rooftop 10 visible color camera 11 camera mount 12, 16 motor 13, 17 angle detector 15 left and right turning Axis 19 Vertical turning axis 20, 70 Control device 30 Transmission cable 40 Display unit 41 Operation unit 42 Monitoring calculation unit 50 Monitoring image 51 Fire occurrence location 52 Luminance 53 Threshold level 54 Camera-oriented center 55 High-luminance region 60 Monitoring headquarters 61 Monitoring control Board 62 Monitor 65 Rooftop 66,69 Field of view 68 Mountaintop 71 Power monitor 73 Emergency generator 74,75 Wireless transmitter 77 Generator start / stop unit

Front page continued (72) Inventor Yasuto Nishijima 234 Matsumoto, Higashiya-cho, Nishi-ku, Kobe-shi, Hyogo Inside Kawasaki Heavy Industries, Ltd. Nishi-Kobe factory Heavy industry Co., Ltd. Nishi-Kobe factory (72) Inventor Koichi Kinto, 234 Matsumoto, Higashiya-cho, Nishi-ku, Kobe-shi, Hyogo Kawasaki Heavy industry Co., Ltd., Nishi-Kobe factory

Claims (8)

[Claims] Claim: What is claimed is: 1. An infrared camera for imaging with infrared light, and the infrared camera, which is held at a high place where the city can be viewed, and the imaging direction of the infrared camera is swivel-displaced in a substantially horizontal plane to obtain the infrared camera. A camera base for angularly displacing the imaging direction in a substantially vertical plane; a control means for driving the camera base according to a predetermined program to control the infrared camera to capture an image of a city area within a predetermined range; and infrared rays A monitoring device for urban disaster prevention, comprising: a monitoring means that responds to an image output captured by a camera and determines that the heat source is a place where a fire occurs when a local heat source is detected. 2. The control means, in response to the output from the monitoring means, controls the camera stand so that the imaging direction of the infrared camera faces the fire occurrence location when it is determined that a fire has occurred. The monitoring device for urban disaster prevention according to claim 1. 3. The monitoring means calculates a fire occurrence location from map data of a city stored in advance and an image pickup direction of an infrared camera, and displays an image in comparison with a map of the city. The monitoring device for urban disaster prevention according to Item 1 or 2. 4. The infrared ray when each of the infrared rays when the location of the infrared camera is set to two points of a triangle on a plane based on the image output captured by two infrared cameras 4. One of the claims 1 to 3, wherein when one local heat source detected by the camera at the same time is one of the remaining points of the triangle on the plane, the heat source is judged to be a fire occurrence place. Monitoring device for city disaster prevention described in crab. 5. The monitoring means stores in advance the number and position of heat sources other than a fire based on the image output taken by the infrared camera, and the heat sources detected by the infrared camera and the stored information. The heat source is collated, and when the detected heat source is other than the stored heat source, it is determined that the detected heat source is a fire outbreak site. Monitoring equipment for urban disaster prevention. 6. The monitoring apparatus for urban disaster prevention according to claim 1, further comprising a generator with a motor capable of operating at the time of power failure. 7. The monitoring apparatus for city disaster prevention according to claim 6, wherein the generator with a motor is an air-cooled type. 8. A wireless transmission unit capable of wirelessly transmitting a signal indicating an instruction to the control unit and an image captured by the infrared camera.
7. The monitoring device for urban disaster prevention according to any one of 7.