JP3042837B2 - Monitoring equipment for urban disaster prevention - Google Patents

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 disasters such as fires occurring in cities, a monitoring camera mainly for visible light is installed on the roof of a building or the like. The surveillance camera turns up and down or left and right according to an automatic or manual command, and an observer checks an image to be monitored when necessary. In large cities where buildings are becoming very high-rise, it is necessary to monitor from as high a place as possible, such as the roof of a high-rise building, in order to enable a wide view.

For example, Japanese Patent Application Laid-Open No. Hei 5-20559 discloses a prior art in which a visible light television camera is used, a fire is recognized from a monitoring image of a predetermined guard area, and fire detection information is output. In this prior art, a television camera is installed in each of a plurality of guard areas, and while performing intensive monitoring, a flame portion due to a fire is extracted and recognized based on a luminance signal of an image. Japanese Patent Application Laid-Open No. 4-167199 discloses a prior art in which an infrared camera and a camera for visible light are used to detect a fire in a pit of a waste disposal 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. Also, JP-A-3-1862
74 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 scanning range of the infrared camera is limited to a range where water from the automatic fire extinguishing device can reach, and similarly, a fire in a narrow range can be detected.

[0005] According to the prior art in which a monitoring camera for visible light or infrared light is installed on the roof of a building or the like, and a monitoring person checks an image of a monitoring target, the monitoring person is not liable to a fire at night. Cannot be quickly discovered unless they are constantly looking at images. If discovery is delayed, early firefighting activities may be delayed and the possibility of fire spread may arise. In addition, even if the fire occurrence can be confirmed from the monitoring image, the fire occurrence site cannot be automatically specified, so that the observer estimates the location while looking at an image of another place or the like. There is a need.

Further, in order to confirm the occurrence of a fire from the monitoring image, the object detected as a high heat source may be a high heat source equivalent to a fire, such as a mercury lamp, a factory chimney, or an exhaust muffler of a traveling vehicle. There is also a large discrimination work load by the supervisor.

Further, as shown in FIG. 16, in order to automatically specify the fire occurrence site, the calculation based on the imaging direction 201 of the surveillance camera 200 only requires the calculation of the high-rise building 2.
For example, in the case of the fire 02, a place 203 farther than the actual place may be determined to be a fire spot and may be erroneously recognized.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an urban disaster prevention monitoring system capable of automatically judging the occurrence of a fire by image processing, improving the reliability of the fire judgment result, and reducing the work load of a supervisor. It is to provide a device.

[0009]

According to the present invention, there is provided an infrared camera which performs imaging by infrared light, and the infrared camera is held at a high place where a city can be viewed, and the imaging direction of the infrared camera is set in a substantially horizontal plane. And a camera base for angularly displacing the imaging direction of the infrared camera in a substantially vertical plane, and driving the camera base in accordance with a predetermined program so as to continuously perform a rotational displacement. A control unit that captures an image of a region and controls a stop at a position where the heat source is at the center of the imaging screen when a heat source is included in the image output, and responds to an image output captured by an infrared camera when the rotation is stopped. Storage means for storing the area and the center of gravity of the image of the heat source; and storing the area and the center of gravity of the image of the heat source in response to the image output taken by the infrared camera. The area and the center of gravity of the corresponding image stored in the column are compared with each other, and when a change in the center of gravity is smaller than a predetermined reference as a moving body and an increase in area is larger than a predetermined reference, it is determined that a fire has occurred. Or a monitoring means for recognizing the shape of the heat source from an image captured by an infrared camera and determining a fire by comparing the time-series change shapes, wherein the control means determines whether the fire is detected by the monitoring means. A monitoring device for city disaster prevention, characterized in that control is performed to restart the turning displacement of the platform. According to the present invention, the monitoring means determines whether or not there is a fire based on changes in the area of the heat source and the position of the center of gravity in the image captured by the infrared camera which continuously turns and stops turning when the heat source is detected. If there is no change in the area or the position of the center of gravity of the heat source, it can be determined that the heat source is not a fire, such as a bonfire, a mercury lamp, or a factory chimney. If the change in area is small even if the position of the center of gravity moves, for example, it can be determined that the muffler or the like discharges exhaust gas from a moving body such as a running car. In addition, by recognizing the shape of the heat source and comparing the time-series change shape with the fire spread pattern data stored in advance in the database, for example, it is possible to determine that a fire has occurred based on the fluctuation of the fire or the pattern in which the sparks soar. . In addition, external weather data (temperature, wind direction,
By taking in and using wind speed, temperature, and the like, it is possible to compare with a fire pattern that is optimal for the condition, and to increase the accuracy of fire determination. Since a heat source different from a fire can be distinguished and excluded from the determination target, the accuracy of the fire determination can be improved and the reliability can be improved.

Further, according to the present invention, an infrared camera that performs imaging by infrared light, the infrared camera is held at a high position where a city can be viewed, and the imaging direction of the infrared camera is displaced in a substantially horizontal plane. A camera base for angularly displacing the imaging direction of the infrared camera in a substantially vertical plane, a control means for driving the camera base according to a predetermined program, and controlling the infrared camera to capture an image of a predetermined city area; In response to the image output taken by the camera, when a local heat source is detected during the image output, monitoring means for judging that the heat source is a place where a fire has occurred; A distance measuring device that is mounted to face and measures the distance to the object to be imaged, and responds to the output from the monitoring device and the distance measuring device. The distance to the heat source to be measured is measured by a distance measuring device, and based on the distance to the heat source, the imaging direction and the installation altitude of the infrared camera, the position determining means for determining the position of the fire occurrence site, and the position determining means determine the position of the fire. And a fire position display means for displaying the position of the fire occurrence site on a map. According to the present invention, the distance to the heat source determined to be a fire spot by the monitoring means can be determined by a distance measuring device that is mounted on a camera base together with the infrared camera and measures the distance in the imaging direction. It is possible to prevent a building fire or the like from being erroneously recognized as a distant place, and to specify a highly reliable fire spot. Further, the location of the fire occurrence site can be displayed and confirmed on a map.

Further, according to the present invention, an infrared camera for imaging by infrared light, the infrared camera is held at a high place where the city can be viewed, and the imaging direction of the infrared camera is turned in a substantially horizontal plane, A camera base for angularly displacing the imaging direction of the infrared camera in a substantially vertical plane, a control means for driving the camera base according to a predetermined program, and controlling the infrared camera to capture an image of a predetermined city area; In response to the image output captured by the camera, when a local heat source is detected during the image output, a monitoring unit that determines that the heat source is a fire occurrence location, and a city to be imaged by the infrared camera, A map database in which a map is stored in advance in association with a building and related information necessary for fire-fighting activities, and the monitoring means responds to the output from the monitoring means. For a heat source that is determined to be a fire occurrence site, the imaging range is calculated from the installation altitude, installation position, imaging direction, and viewing angle of the infrared camera, and the imaging range and the imaging direction are displayed together with the map read out from the map database. In response to the output from the display means and the monitoring means, the location of the heat source determined by the monitoring means to be a fire occurrence location is specified, and the building stored in correspondence with the specified location with reference to the map database. And an information reading means for reading related information required for fire extinguishing activities. According to the present invention, a heat source is detected from the image output of the infrared camera,
When the monitoring means determines that the location of the fire has occurred, the information reading means refers to the map database, and stores information related to the building stored in correspondence with the location specified as the location of the fire, such as an address and a household. Information such as main information can also be read out. Since the information can be obtained without the observer erroneously recognizing the place where the fire occurred, the information can be used for fire fighting instructions and communication. Further, it is easy to give an instruction of a fire extinguishing system based on a fire extinguishing command, and the information can be effectively used for route guidance and fire hydrant position information during fire extinguishing activities, thereby improving the reliability of fire determination. Further, since the fire range display means displays the imaging range and the imaging direction of the infrared camera on the map, anyone can easily specify the location of the actual imaging range and improve the reliability of fire detection. be able to.

Further, the present invention provides an infrared camera for capturing an image with infrared light corresponding to a temperature equal to or higher than a predetermined reference, an infrared camera which is held at a high place where a city can be viewed, and an imaging direction of the infrared camera. A camera table that turns and displaces the camera in a substantially horizontal plane and angularly displaces the imaging direction of the infrared camera in a substantially vertical plane. Control means for controlling to take an image, and monitoring means for responding to the image output taken by the infrared camera and determining that the heat source is a fire place when a local heat source is detected during the image output. In response to the output from the monitoring means, change the temperature range of the infrared light imaged by the infrared camera to the low temperature side around the heat source determined by the monitoring means to be the site of the fire Te, a city disaster-prevention monitoring system, which comprises a reference changing means for changing the program of the control means to image. According to the present invention, at the stage of detecting a fire, the temperature range of infrared light captured by the infrared camera is set to correspond to a temperature equal to or higher than a preset reference temperature. be able to. After the fire is detected, the temperature range of the infrared light is changed to the low temperature side, so that it is possible to easily grasp the surrounding situation where the temperature is low. Since infrared rays are used, the situation can be grasped with high reliability even at night.

Further, according to the present invention, an infrared camera that performs imaging by infrared light and outputs temperature distribution data of an imaging target, and the infrared camera is held at a high place where a city can be viewed,
A camera base that turns the imaging direction of the infrared camera in a substantially horizontal plane and angularly shifts the imaging direction of the infrared camera in a substantially vertical plane, and a camera base are driven in accordance with a predetermined program. Control means for controlling the imaging of an area of a predetermined city, and in response to the image output taken by the infrared camera, when a local heat source exceeding a predetermined reference temperature is detected during the image output, the heat source is A monitoring device for disaster prevention in an urban area, comprising: a monitoring unit that determines a fire location and monitors a surrounding of a heat source determined to be a fire location by an image output from an imaging direction of an infrared camera. . According to the present invention, it is always possible to detect a fire as a high heat source and grasp the situation around the high heat source from the image output from the infrared camera. If the image output of the infrared camera is recorded, the situation before and after the fire detection can be easily grasped, and the reliability of the fire detection can be improved.

[0014]

Further, according to the present invention, an infrared camera for performing imaging by infrared light, the infrared camera is held at a high place where a city can be viewed, and the imaging direction of the infrared camera is turned in a substantially horizontal plane, A camera base for angularly displacing the imaging direction of the infrared camera in a substantially vertical plane, a control means for driving the camera base according to a predetermined program, and controlling the infrared camera to capture an image of a predetermined city area; In the image output taken by the camera, storage means for storing the position of the high heat source, and in response to the image output taken by the infrared camera, refer to the storage means when the high heat source is included in the image output. However, if the high heat source is not yet stored, or even if it is stored, the area and shape of the high heat source are examined, and if a change is found, the predetermined heat is applied according to the predetermined criteria. A determination is made as to whether the high heat source is a fire place.If the high heat source is already stored and no change is found, or if it is determined that the place is not a fire place, the position, area, and shape of the high heat source are determined. Is stored in the storage means, so that the high heat source deviates from the image, the imaging direction of the infrared camera is rotated by a predetermined angle via the control means, and further, the infrared camera is driven to rotate by a predetermined program, A monitoring device for urban disaster prevention characterized by including a monitoring unit that repeats the same processing when a high heat source is included in the infrared image output. According to the present invention, once the high heat source is stored in the storage means, the angle of the turning displacement of the infrared camera is changed by a predetermined angle, so that the fire detection can be accurately performed without detecting the same high heat source repeatedly. Can be performed, and the reliability can be improved.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIGS.
An embodiment of the present invention will be described. In each of the drawings, the same reference numerals are given to portions corresponding to the portions described in advance, and redundant description may be omitted.

FIG. 1 shows a basic configuration of an urban disaster prevention monitoring device according to one embodiment of the present invention. FIG. 1A shows an installation state of a monitoring camera, and FIG. 1B shows an appearance of a panel of the monitoring apparatus. As a surveillance camera, an infrared camera 2 is housed in a camera housing 1 and a camera base 3
It is mounted on the swivel 4 above. The swivel table 4 can swivel the camera housing 1 in a horizontal plane and a vertical plane, change the imaging direction of the infrared camera 2, and image each area in the city. An emergency prime mover power supply 6 is installed adjacent to the camera installation base 5 and is provided in the event of a power failure. An antenna 7 is provided on the camera installation base 5 together with the camera base 3, and an image or the like captured at a remote place can be transmitted wirelessly. The monitoring device 8 shown in FIG. 1B is installed, for example, in a building such as a building where the camera stand 3 of FIG. In this case, signal transmission between the infrared camera 2 and the monitoring device 8 is performed via a signal cable.

FIGS. 2 and 3 show the structure of the swivel 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 outdoors, for example, in the camera base 3 of FIG. 1, and includes a camera control unit 21, a swivel base control unit 22, an infrared camera control unit 23, a visible color camera control unit 24, a power supply 25, and a transmission control unit 26. including. The camera control unit 21 also performs infrared image processing. 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. In addition, the turning angle is monitored based on the outputs from the angle detector 13 and the angle detector 17. The infrared camera control unit 23 controls the focus and gain of the infrared camera 2 and offset or zoom. The visible color camera control unit 24 controls the focus, zoom, and iris 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. Transmission control unit 26
Transmits image signals captured by the infrared camera 2 and the visible color camera 10 via 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 transmits command signals to the swivel control unit 22, the infrared camera control unit 23, and the visible color camera control unit 24. The transmission cable 30 further includes a monitor signal line 34,
Sends a turning angle monitor signal.

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 operation unit 42, a power supply 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. 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. The operation unit 41 includes a joystick, a keyboard, and the like. The monitoring operation unit 42 includes:
Calculation processing such as map creation 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 turntable 4 according to 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. The turning angle monitor signal is received.

FIG. 5 shows an operation of automatically monitoring a fire by the program search command unit 44 having the configuration shown in FIG.
The program search command unit 44 serving as a monitoring unit includes a memory as a storage unit. The operation is started from step a1, and in step a2, the turntable 4 is commanded to make one turn of the camera housing 1 in a predetermined monitoring area of the city. In step a3, an image is acquired by the infrared camera 2 in the monitoring area. In step a4, a high-temperature body determination process is performed to determine whether or not a high-temperature body exists in the acquired image. The output level of the image signal from the infrared camera 4 corresponds to the temperature of the object to be imaged, and a threshold level is set in advance as a reference level in order to make it easy to determine whether or not a fire has occurred. . If the image signal level does not exceed the threshold level, the process returns to step a2.

When it is determined in step a4 that the body is a high temperature body,
In step a5, the revolving base 4 is controlled to pull in the image so that the image of the high-temperature body is at the center of the imaging screen, and the revolving is stopped. In step a6, referring to the contents stored in the memory, the same high-temperature body determination processing is performed to determine whether the high-temperature body is the same as the high-temperature body already stored in the memory. The determination is made as to whether or not the horizontal and vertical angle data of the swivel 4 and the area of the image and the shape of the heat source substantially match the past data obtained in the previous swing stored in the memory. It depends on.

If it is determined in step a6 that they are not the same high temperature body, a fire determination process is performed in step a7 to determine whether or not a fire has occurred. The fire determination is made based on the change in the image area and the movement of the center of gravity, as compared with the data stored in the memory. If the data to be compared is not stored in the memory, it is the first data, and it is not determined that a fire has occurred. Note that the center of gravity is a geometric center of gravity of the figure surrounded by the outline of the image.

For example, in the case of a large mercury lamp used for lighting a wide area, a large amount of infrared light is emitted from a hot filament through a glass tube. However, the image as a heat source is constant, and the area and the center of gravity do not change. In addition, mobile bodies such as factory chimneys and automobiles that emit high-temperature exhaust gas and the like have little area change as a heat source. In particular, the movement of the center of gravity of a moving body such as a muffler of an automobile is detected, so that it can be easily determined. In a fire, the criterion for determination is that the heat source area increases with time. When a high-temperature body is detected by the processing in step a5 described above, a fire is determined by first comparing the area data with the center-of-gravity position stored at a predetermined time interval while stopping turning at that position. .
Also, a fire determination is made by comparing the data stored in the first turn with the data obtained in the nth turn.

If it is determined in step a7 that a fire has occurred, an alarm is generated on the display unit 40 and a fire position is displayed in step a8. If it is not determined that a fire has occurred, in step a9 or step a10, data such as the turning angle, the heat source area, and the area center of gravity at that time are stored in the memory, and the process returns to step a2. When the operation in step a8 ends, the automatic monitoring operation ends in step a11, and waits for the next operation from the observer.

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. An image in which a high-luminance portion is detected for each horizontal scanning line AA and changed to a two-dimensional binarized image by image processing is, for example, as shown in FIG. The center of the screen is the camera orientation center 54, and the high brightness portion 55 is 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 vertical / horizontal displacement angle from the camera pointing center is obtained from the center-of-gravity position data and the viewing angle corresponding to the binarized image when the camera is pointed at the high-brightness site, and further the camera vertical / left / right angle From the data, FIG.
(A) The fire occurrence place 51 can be specified.

FIG. 7 shows an overall configuration of a monitoring device for city disaster prevention 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, via an antenna 63, an infrared image signal corresponding to the field of view 66 from a rooftop monitoring station 65 provided on the roof of a tall building 64 in the city. 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 city disaster prevention shown in FIG. A control device 70 provided at the rooftop monitoring station 65 or the mountaintop monitoring station 68 includes a power supply monitoring unit 71.
When the external power source is in the event of a power failure, the emergency battery 72 immediately backs up the battery, and when the power failure continues, the emergency generator 73 is operated in response to a command to secure power supply. . 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. An emergency generator 73 attached to the control device 70 is provided in the monitoring control panel 61.
A generator start / stop command unit 77 for remotely controlling the start / stop of the power generator is provided. If the recovery from the power failure is delayed due to a large earthquake or the like, a command for operating the emergency generator 73 is issued. The emergency generator 73 preferably includes an air-cooled type 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, the use of the automatic start / stop type air-cooled emergency generator 73 with a motor that can be remotely controlled enables acquisition of a monitoring image even in the case of a power failure 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 shows a display screen 81 by the monitoring device 8.
The state where the map is displayed above is shown. FIG. 9A shows a display state including the entire imaging region 82 of the infrared camera 2, and FIG. 9B shows a map of an installation position 83 of the infrared camera 2 in the imaging region 82 and an area near the visual field 84. The enlarged display is shown. The monitoring device 8 calculates a fire occurrence location corresponding to the high-brightness region 55 in FIG. 6C from the pre-stored map data of the city and the imaging direction of the infrared camera 2, and associates the calculated location with the map of the city. Display images. On the display screen 81, a map display area 85 in which a map is displayed, and a display selection area 86 extending in the horizontal direction, that is, in the horizontal direction below the map display area 85, are displayed. Map display area 8
The display of 5 and the display selection area 86 can be realized by a commercially available software program of a personal computer. For more information on Windows
s (product name) can be realized as a background image called wallpaper. A program in which such map data is stored is stored in a storage medium such as a CD-ROM or an EP-ROM. As the display of the map display area 85, a map of a range including the installation position 83 of the infrared camera 2 and the imaging area 82 of the infrared camera 2 is selected.
The map data further includes the vicinity of the field of view 84 during shooting by the infrared camera 2, the camera installation position 83, and the camera pointing direction 83.
The detailed map data including the enlarged area 87 including a.

The display selection area 86 includes the installation position 83 of the infrared camera 2 and the entire imaging area 82 of FIG.
An enlarged display setting section 88 for setting enlarged display of the enlarged area 87 near the installation position 83 and the field of view 84 from the display state shown in FIG. Further, in the display selection area 86, a reduced display setting section 89 for switching from the enlarged display state set by the enlarged display setting section 88 to the original reduced display, and the display screen 81 are shown in FIGS. And a display switching setting section 90 for switching from the map display state shown in FIG. 6 to the captured video display state shown in FIG. 6A, or from the captured video display state to the map display state.

To enlarge and display the enlarged area 87 in FIG. 9A over the entire map display area 85, the enlarged display setting section 88 is set by, for example, a touch pen, or a mouse pointer is displayed on the enlarged display setting section 88 by a mouse. 9A, the enlarged area 87 in FIG. 9A is enlarged over the entire map display area 85 as shown in FIG. 9B. Since the display can be switched between the wide area display and the enlarged display in this manner, it was confirmed where the fire occurred geographically by the map display of a wide range shown in FIG. 9A. Later, FIG.
As shown in (b), it is possible to confirm a more specific position of a fire occurrence location and a road in a surrounding area by performing enlarged display as shown in (b). 9 (a) and FIG.
In any of the display modes (b), the installation position 83 of the infrared camera 2 is displayed, so that the positional relationship of the fire occurrence location can be easily grasped on the same screen based on the installation position 83 of the infrared camera 2. The location of the fire can be identified at a glance. Further, various types of disaster rescue support information such as wind direction, wind speed, humidity, and temperature may be simultaneously displayed in the map display area 85 or the display selection area 86 on the display screen 81.

The imaging area 82 is displayed by a frame surrounding the imaging area in response to a control signal from the infrared camera control unit 23 of the control device 20. The field of view 84 corresponds to the directional direction of the infrared camera 2, and is displayed by a frame that moves in the imaging area 82 based on a control signal from the swivel control unit 22. As shown in FIG. 6, when the visual field 84 and the directional direction 83a which is the imaging direction move the imaging area 82 from the right end area in FIG. 9A to the left end area, that is, clockwise, as shown in FIG. When a high-brightness portion 55 determined to be a fire occurrence location is detected, the detected position is displayed by, for example, an X-shaped red blinking display 91. The red blinking display section 91 continues to display until it is determined that the visual field 84 has passed and is not a heat source. As described above, when the luminance detected by the infrared camera 2 exceeds the threshold level 53, the heat source is determined to be a fire occurrence place, and the red blinking display 91 is continued. If the luminance is equal to or lower than the threshold level 53, a red blinking display 91 is displayed.
Stops. In the fire display such as the red flashing display 91, a plurality of threshold levels 53 are set in advance, and the luminance input as image information from the infrared camera 2 is determined stepwise according to each level, and the scale of fire occurrence, combustion temperature The type of fire, such as, may be distinguished step by step.

As described above, in the embodiment shown in FIG.
Since the map data is displayed as a background image on the display screen 81, the map can be easily changed, the time required for the map change can be reduced, and the data load on the personal computer can be significantly reduced. Thus, it is possible to easily and accurately specify a fire occurrence location.

As shown in FIG. 10, when the angle at which the imaging direction of the infrared camera 2 forms a horizontal plane is θ, the viewing angle of the infrared camera 2 is φ, and the installation altitude of the infrared camera 2 is H, FIG.
The range R of the field of view 84 can be calculated by a geometric calculation. Further, the position and the direction of the visual field 84 can be calculated from the imaging direction, the altitude, and the viewing angle with reference to the position of the infrared camera 2.

FIG. 11 shows a configuration for simultaneously measuring the distance to a fire occurrence location as still another embodiment of the present invention. In a camera housing 101 in which the imaging direction of the infrared camera 2 is controlled by the control device 100, a distance measuring device 102 is installed with the infrared camera 2 and the boresight aligned. The configuration for rotating the camera housing 101 is basically the same as that of the camera housing 1 in FIG. When the infrared camera 2 captures the heat source in the field of view 66, the distance measurement device 102 can measure the distance to the heat source by irradiating the laser light 103 or the like and detecting the position of the reflected light. . The control device 100 monitors data via the wireless transmission devices 74 and 75 and the like.
To be transmitted. The monitoring device 104 displays the camera housing 1 in the map display area 85 on the display screen 81 of the display device 40.
The installation position 83, the fire occurrence place 51, and the like are displayed. Since the fire occurrence location 51 is calculated based on the angle of the swivel base, the installation altitude, and the distance of the infrared camera 2, it can be accurately calculated and displayed. As a result, erroneous recognition as described with reference to FIG. 16 can be avoided and reliability can be improved.

FIG. 12 shows the configuration of a system in which the image display of the infrared camera 2 is linked to a map database as still another embodiment of the present invention. The map database device 110 stores a map of a house or a street and information related to the house or building on the map, such as an address, a householder's name, and a telephone number, in a database. Key 11
From 1, it is also possible to input an address, a householder's name, etc., display the map 112, and display the corresponding position. The monitoring device 104 connected to the database device 110 via the communication line displays the fire location 51 and the like in the same manner as in the embodiment of FIG. 11, and displays information obtained from the database device 110 in the data display area 113. For example, to display. Further, when an address or a household name is input from the map database device 110 with the key 111, the imaging direction of the infrared camera 2 can be directed to the input address or household.

In the monitoring system that only displays the fire occurrence location 51 on the map, the area can be specified only by the monitoring person reading the information described on the map.
In the present embodiment, the address and the householder's display can be grasped without the monitoring personnel erroneously recognizing the place where the fire occurred, which can be used for firefighting instructions, and the fire extinguishing system can be easily instructed.

As information on the fire occurrence location 51, for example, a telephone number is also useful. If the telephone number of the fire occurrence location 51 or its vicinity is known, it can be confirmed by calling directly. In addition, if there is a telephone call for the occurrence of a fire, just listen to the telephone number and the monitoring device 1
The collation with the fire occurrence place 51 specified by 04 can be easily performed. In addition, the map data should include information related to fire extinguishing activities, such as the location of fire hydrants and water sources, the location of hazardous materials, the location of parks that are not buildings, and guidance information such as road names and road widths for roads. This can contribute to speeding up fire fighting activities.

FIG. 13 shows a basic configuration of still another embodiment of the present invention. The infrared camera 2 is used as a high heat source detection sensor that can detect only the high heat source by adjusting the gain and the offset. Therefore, only the high heat source appears in the captured image,
It is not possible to grasp the surrounding situation where the temperature is low. In the present embodiment, as shown in FIG. 13A, the gain and offset of the infrared camera 2 can be automatically changed by the control device 120. The control device 120 also provides the image output of the infrared camera 120 to the image processing device 121 until a fire is detected. When the image processing device 121 detects a fire, the control device 120 changes the gain and offset of the infrared camera 2 to the low temperature side, gives an image output to the display device 40, and displays an infrared image around the high brightness portion 55. Let it. In the case where the infrared image around the high brightness portion 55 shown in FIG. 13B is as shown in FIG. 13C, it is understood that the fire is not a fire but a bonfire. Since the surrounding situation is confirmed by the infrared image, the situation can be easily grasped even at night or the like.

FIG. 14 shows that the infrared camera 122 obtains an image output from each pixel as a multivalued digital signal.
Image processing for fire detection in the image processing device 121;
The infrared image display of the surrounding low-temperature portion on the display device 40 is performed in parallel. It is possible to constantly detect a fire and grasp the surrounding situation. If an infrared image is recorded on a VTR or the like, the situation before and after the detection of the fire can be checked later, and the cause of the fire can be easily checked.

FIG. 15 shows still another embodiment of the present invention, and shows a state in which the swivel angle of the swivel table is changed after detecting a high heat source. FIG. 15A shows a state where the visual field 84 of the infrared camera 2 approaches the high heat source 125. FIG.
5 (b), the high heat source 125 is once taken in so as to be at the center of the visual field 84 as shown in step a5 of FIG. In this state, if the high heat source 125 is not determined to be a fire, the turning is started again, and the high heat source 125 remains in the visual field 84 and is taken in so as to be at the center of the visual field 84. In the present embodiment, as shown in FIGS. 15 (2) and (3), the turning angle is changed by a certain angle so as not to detect the high heat source detected immediately before restarting the automatic fire detection. Efficiency reduction can be prevented.

[0045]

As described above, according to the present invention, the monitoring means determines whether or not a fire has occurred based on changes in the area and the position of the center of gravity or the shape of the heat source in the image taken by the infrared camera. By excluding the body, the accuracy of fire determination can be increased, and the reliability can be improved.

Further, according to the present invention, since the distance to the heat source can be obtained, it is possible to prevent a fire in a high-rise building from being erroneously recognized as a distant place, and to specify a reliable fire spot with high reliability. Can also be displayed above.

Further, according to the present invention, the information reading means refers to the database, and stores information related to the building and the fire extinguishing activity stored in correspondence with the position specified as the fire occurrence location, for example, the address, the householder, Information on fire hydrants and parks can also be read out. It can be effectively used for route guidance during fire extinguishing activities, and the reliability of fire judgment can be improved. Furthermore, since the imaging range and the imaging direction of the infrared camera are displayed on the map, anyone can easily specify the location of the actual imaging range, and the reliability of fire detection can be improved.

Further, according to the present invention, the detection accuracy of the high heat source can be improved, and the surrounding situation can be easily grasped. Since infrared rays are used, the situation can be grasped with high reliability even at night.

Further, according to the present invention, it is always possible to detect a fire as a high heat source and grasp the situation around the high heat source from the image output from the infrared camera.

[0050]

Further, according to the present invention, once the high heat source is stored in the storage means, the reliability can be improved.

[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;

FIG. 9 is a diagram showing a state where a map is displayed on a display screen 81 by the monitoring device 8;

FIG. 10 is a diagram showing a geometric relationship regarding display of a visual field 84 in FIG. 9;

FIG. 11 is a perspective view showing a simplified configuration of still another embodiment of the present invention.

FIG. 12 is a perspective view showing a simplified configuration of still another embodiment of the present invention.

FIG. 13 is a block diagram showing a simplified configuration of still another embodiment of the present invention and a diagram showing display contents on a display screen.

FIG. 14 is a block diagram showing a simplified configuration of still another embodiment of the present invention.

FIG. 15 is a diagram showing a simplified display screen change according to still another embodiment of the present invention.

FIG. 16 is a simplified perspective view showing an example in which a high-rise building or the like is erroneously recognized as being distant in the conventional detection of a fire occurrence location.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1,101 Camera housing 2,122 Infrared camera 3 Camera base 4 Revolving base 5 Base for camera installation 6 Power supply with motor 7 Antenna 8 Monitoring device 9 Building rooftop 10 Visible color camera 11 Camera mounting base 12,16 Motor 13,17 Angle detection Device 15 Left and right turning axis 19 Vertical turning axis 20, 70, 100, 120 Control device 30 Transmission cable 40 Display unit 41 Operation unit 42 Monitoring operation unit 50 Monitoring image 51 Fire occurrence place 52 Brightness 53 Threshold level 54 Camera pointing center 55 High brightness Parts 60 Monitoring headquarters 61 Monitoring control panel 62 Observer 65 Roof monitoring station 66, 69 Field of view 68 Yamagami monitoring station 71 Power monitoring unit 73 Emergency generator 74, 75 Wireless transmission device 77 Generator start / stop command unit 81 Display screen 83a Direction direction 84 Field of view 104 Monitoring device 110 Ground Database system 113 the data display area 121 the image processing apparatus 125 high heat source

Continuation of the front page (56) References JP-A-3-163700 (JP, A) JP-A-7-143252 (JP, A) JP-A-8-65551 (JP, A) JP-A-5-20564 (JP) , A) Japanese Utility Model Hei 8-305980 (JP, U) (58) Field surveyed (Int. Cl. ⁷ , DB name) G08B 17/02-17/12 H04N 5/222-5/257

Claims (6)

(57) [Claims] 1. An infrared camera that performs imaging by infrared light, and an infrared camera is held at a high position where a city can be viewed, and the imaging direction of the infrared camera is turned and displaced in a substantially horizontal plane. A camera base for angularly displacing the imaging direction in a substantially vertical plane, and the camera base is driven in accordance with a predetermined program so as to be continuously rotated and displaced, and an infrared camera takes an image of a predetermined city area and outputs an image. Contains a heat source,
Control means for controlling the heat source to stop turning at a position in the center of the imaging screen; and storage means for storing an area and a center of gravity of an image of the heat source in response to an image output taken by an infrared camera when the turning is stopped. In response to the image output taken by the infrared camera, the area and the center of gravity of the image of the heat source are compared with the area and the center of gravity of the corresponding image stored in the storage means, respectively, and the change of the center of gravity is determined. When it is smaller than the predetermined reference as the moving object and the increase in area is larger than the predetermined reference, it is judged as a fire, or the shape of the heat source is recognized from the image taken by the infrared camera, and the time-series changes in shape are compared. Monitoring means for determining a fire by the control means, wherein the control means restarts the turning displacement of the camera base when the monitoring means does not determine a fire. Monitoring device for urban disaster prevention, characterized in that it is controlled in a controlled manner. 2. An infrared camera which performs imaging by infrared light, and an infrared camera which is held at a high position where a city can be viewed, and which is rotated and displaced in a substantially horizontal plane by an imaging direction of the infrared camera. A camera base for angularly displacing the imaging direction in a substantially vertical plane; control means for driving the camera base in accordance with a predetermined program to control the infrared camera to capture an image of a predetermined city area; In response to the image output, when a local heat source is detected during the image output, monitoring means for judging that the heat source is a place where a fire has occurred, and a camera stand so as to face the imaging direction of the infrared camera. A ranging device that is mounted and measures the distance to the object to be imaged, and a monitoring device and a heat source that responds to the output from the ranging device and that is determined to be a fire site by the monitoring device Determining the position of the fire occurrence site based on the distance to the heat source, the imaging direction of the infrared camera, and the installation altitude, and a fire occurrence determined by the position determining means. And a fire position display means for displaying the position of the site on a map. 3. An infrared camera that performs imaging by infrared light, and the infrared camera is held at a high place where the city can be viewed, and the imaging direction of the infrared camera is rotated and displaced in a substantially horizontal plane. A camera base for angularly displacing the imaging direction in a substantially vertical plane; control means for driving the camera base in accordance with a predetermined program to control the infrared camera to capture an image of a predetermined city area; In response to the detected image output, when a local heat source is detected during the image output, monitoring means for judging that the heat source is a fire place, and a map and building for a city to be imaged by the infrared camera. A map database that stores in advance the information related to fire extinguishing activities and related information, and responds to the output from the monitoring means. For a heat source determined to be a field, an installation range of the infrared camera, an installation position, an imaging direction, and an imaging range are calculated from the viewing angle, and a fire range display unit that displays the imaging range and the imaging direction together with the map read from the map database. , Responding to the output from the monitoring means, specifying the position of the heat source determined to be a fire place by the monitoring means, referring to a map database, and storing the building and the fire extinguishing activity corresponding to the specified position. And an information reading means for reading relevant information necessary for the disaster. 4. An infrared camera for imaging with infrared light corresponding to a temperature higher than a predetermined reference, and the infrared camera is held at a high place where the city can be viewed, and the imaging direction of the infrared camera is substantially horizontal. A camera base that turns and displaces the camera in a simple plane and angularly displaces the imaging direction of the infrared camera in a substantially vertical plane.The camera base is driven according to a predetermined program so that the infrared camera takes an image of a predetermined city area. A monitoring means responsive to an image output taken by the infrared camera, and when a local heat source is detected during the image output, determining that the heat source is a fire place; and a monitoring means. In response to the output from the camera, the surroundings of the heat source determined by the monitoring means to be the site of the fire are imaged by changing the temperature range of the infrared light imaged by the infrared camera to a lower temperature side. Urban disaster-prevention monitoring system, which comprises a reference changing means for changing the program of the control means so. 5. An infrared camera which performs imaging with infrared light and outputs temperature distribution data of an imaging target; and an infrared camera which is held at a high place where a city can be viewed, and which has a substantially horizontal imaging direction. A camera base that rotates and displaces in a plane and angularly displaces the imaging direction of the infrared camera in a substantially vertical plane.The camera base is driven according to a predetermined program so that the infrared camera images a predetermined city area. Control means for controlling, in response to the image output taken by the infrared camera, when a local heat source exceeding a predetermined reference temperature is detected during the image output, it is determined that the heat source is a fire occurrence place, Monitoring means for monitoring the surroundings of a heat source determined to be a fire occurrence site by image output from an imaging direction of an infrared camera, and monitoring for disaster prevention in an urban area. apparatus. 6. An infrared camera that performs imaging by infrared light, and the infrared camera is held at a high place where the city can be viewed, and the imaging direction of the infrared camera is turned and displaced in a substantially horizontal plane. A camera base for angularly displacing the imaging direction in a substantially vertical plane; control means for driving the camera base in accordance with a predetermined program to control the infrared camera to capture an image of a predetermined city area; Memory means for storing the position of the high heat source in the image output to be performed, and in response to the image output taken by the infrared camera, refer to the storage means when the high heat source is included in the image output.
If the high heat source is not yet stored, or even if it is stored, the area and shape of the high heat source are examined, and if a change is found, it is determined whether the high heat source is a fire place according to a predetermined standard. If the high heat source is already stored and no change is recognized, or if it is determined that it is not a fire place, the position, area and shape of the high heat source are stored in the storage means, and the high heat source is To deviate from the image,
The control unit rotates the imaging direction of the infrared camera by a predetermined angle through the control unit, further drives the infrared camera by a predetermined program, and performs the same processing when a high heat source is included in the infrared image output. A monitoring device for urban disaster prevention, comprising: a monitoring unit that is repeated.