JPH0821146B2 - Fire monitoring equipment - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fire monitoring device adapted to monitor a fire in a warning area with a fire sensor and a television camera.

(Prior Art) Conventionally, in a device for monitoring a fire in a large space structure such as a ball stadium or an exhibition hall, for example, a heat radiation sensor for detecting a heat ray emitted from a fire source is provided, and this heat radiation sensor Fire is monitored in the warning area by horizontal and vertical rotation scanning of the TV, and a TV camera is installed so that the situation in the warning area can be grasped. A device has been considered in which a camera is activated to point it at the position of the fire source, and an image of the fire source is displayed on a monitor TV.

(Problems to be Solved by the Invention) However, in such a conventional device for monitoring a fire with a fire sensor and a TV camera, the fire sensor and the TV camera are installed at different positions, When the position of the fire source is detected by the fire sensor because the position is different, the position coordinates of the fire source by the fire sensor are converted into another coordinate position determined by the installation position of the TV camera to control the TV camera toward the fire source position direction. Since the coordinate conversion is required to control the orientation of the TV camera, the conversion process is complicated and the device cost is increased, and because the field of view of the TV image and the field of view of the fire sensor are different, It may be difficult to understand the position of the fire source and the fire situation, and it may take some time before the TV camera is turned to the fire source depending on the stop position of the camera. There was a problem that it took time.

(Means for Solving Problems) The present invention has been made in view of such problems in the related art, and is in a stopped state without requiring conversion processing of position coordinates when a fire is detected by a fire sensor. An object of the present invention is to provide a fire monitoring device in which a TV camera is activated to direct the fire source position to the fire source position and the fire source position is displayed on a monitor TV.

In order to achieve this object, in the present invention, a fire sensor which is horizontally or horizontally and rotationally scanned to detect a fire in a warning area, and a fire sensor which is installed in the vicinity of the fire sensor and is in a steady monitoring state. A fire monitoring device including a television camera which is rotated and stopped at a predetermined position and is activated when a fire is detected and is directed to a fire source position, and a monitor television which displays an image of the fire source position by the television camera. When the camera is stopped, the TV camera is installed so that the rotation zero coordinate of the TV camera, which is the center of the screen of the monitor TV, matches the zero coordinate of the fire sensor with respect to the warning area, and the position of the fire source detected by the fire sensor By using the coordinates as the position coordinates for directing the TV camera to the fire source, coordinate conversion is unnecessary and the TV camera can be quickly directed to the fire source position. In which was to so that.

(Embodiment) FIG. 1 is a block diagram showing an embodiment of the present invention.

First, the configuration will be described. Reference numeral 1 is a sensor unit installed in the vicinity of the caution area. The sensor unit 1 is provided with a heat radiation sensor 2 as a fire sensor that detects a fire source by rotating the warning area in horizontal and vertical directions. The thermal radiation sensor 2 is mechanically driven by a motor provided in the horizontal drive unit 4 by the sensor controller 3 to reciprocally rotate within a predetermined angle range around the horizontal axis, and in the vertical direction, vertical scanning based on the output of the sensor controller 3 is performed. The thermal radiation sensor 2 is vertically scanned by electrical scanning by the unit 5. Needless to say, the heat radiation sensor 2 may be one that mechanically rotates and scans not only in the horizontal direction but also in the vertical direction by driving the motor.

On the other hand, a TV camera 6 is installed in the vicinity of the heat radiation sensor 2 so as to face the warning area. In this embodiment, the TV camera 6 has a horizontal drive unit 4 of the heat radiation sensor 2 via an electromagnetic clutch 7. Mechanically connected to. The vertical rotation of the television camera 6 is performed by a motor provided in the vertical drive unit 8. The horizontal rotation of the television camera 6 by turning on and off the electromagnetic clutter 7 and the vertical rotation by the vertical drive unit 8 are performed by a control signal from the camera controller 9.

On the other hand, the detection output of the heat radiation sensor 2 is input to the fire detection unit 10, and the fire detection unit 10 outputs a fire detection signal to the camera controller 9 when the sensor output exceeds a predetermined threshold level for judging a fire. Then, the TV camera 6 is started, and the direction control of the TV camera 6 toward the fire source position is performed by controlling the electromagnetic clutch 7 and the vertical drive unit 8.

For such a sensor unit 1, a monitor television 12 is installed in a surveillance room or the like which is away from the warning area, and a video signal from the television camera 6 provided in the sensor unit 1 is supplied to the monitor television 12. In addition, the fire detection signal of the fire detection unit 10 is supplied as a power-on signal of the monitor TV 12.

2 and 3 are explanatory views showing a specific example of the heat radiation sensor 2 and the television camera 6 provided in the sensor unit 1 of FIG. 1, and FIG. 4 is a partial sectional view of the mechanical structure thereof. Shown in.

In FIGS. 2 and 3, the heat radiation sensor 2 is rotatably installed on a pedestal 13 about a horizontal axis, and the television camera 6 will be clarified in the following description with respect to the rotation axis of the heat radiation sensor 2. As described above, it is provided at the upper end of the L-shaped support post 15 mounted behind the rotary table 14 mounted via the electromagnetic clutch, and the TV camera 6 is further vertically rotated at the upper end of the support post 15. A tilt base 16 is provided to allow the television camera 6 to be mounted on the tilt base 16 with a rotating shaft 17. On the other hand, the thermal radiation sensor 2 is provided with a detection window 18 that opens toward the monitoring area, and the vertical opening length of the detection window 18 determines the vertical detection range, and the horizontal width of the detection window 18 in the horizontal direction. Is the detection range. In addition, the heat radiation sensor 2
In the vertical scanning, a rotating mirror which is rotated around a vertical direction by a motor is built in, and the incident light from the rotating mirror is focused on a detecting element to perform the detecting scanning in the vertical direction.

Next, the drive mechanism of the heat radiation sensor 2 and the television camera 6 will be described with reference to FIG. 4. A fixed post 19 is installed on the top of the pedestal 13, and the heat radiation sensor 2 is placed on the fixed post 19. The lower end of the mounted rotating post 20 is rotatably assembled by interposing a thrust bearing or the like.
The rotation post 20 is integrally provided with a gear 21, and the gear 21 is meshed with a gear 23 provided on an output shaft of the motor 22, so that the motor 22
Thus, the rotary post 20 provided with the heat radiation sensor 2 can be horizontally rotated via the gears 23 and 21.
A pulse motor is used as the motor 22,
The thermal radiation sensor 2 is stepwise rotated in the horizontal direction, and a vertical rotation is carried out by a rotating mirror built in each step rotation.

On the other hand, a turntable 14 provided outside the upper part of the gantry 13 is provided.
Is connected to the rotary post 20 via the electromagnetic clutch 7. When the electromagnetic clutch 7 is turned on, the rotary base 14 is rotated in the horizontal direction integrally with the rotary post 20, and the electromagnetic clutch 7 is turned off to disconnect the clutch. The rotation will stop at the clutch disengagement position.

Further, the motor 24 is incorporated inside the tilt base 16 of the TV camera 6 provided at the upper end of the support post 15 mounted behind the rotary base 14, and the gear mounted on the output shaft of the motor 24.
25 is meshed with a gear 26 attached to the rotary shaft 17 of the television camera 6 so that the motor 24 can be driven to control the rotation of the television camera 6 in the vertical direction.

Next, the installation relationship of the television camera 6 with respect to the heat radiation sensor in the present invention will be described.

FIG. 5 is a side view showing an installation state of the heat radiation sensor 2 and the television camera 6 in the warning area, and FIG. 6 is a plan view thereof.

As is clear from FIGS. 5 and 6, the thermal radiation sensor 2 and the television camera 6 are installed at positions where the surveillance surface 30 of the caution area is monitored obliquely from above. Becomes α, and the horizontal monitoring angle due to horizontal rotation becomes θ as shown in FIG. On the other hand, in the TV camera 6, the screen center P of the monitor TV 12 shown in FIG. 1 is the optical axis center of the lens of the TV camera 6, and this optical axis center is the rotation zero coordinate axis 32 of the TV camera 6.

Regarding the horizontal and vertical scanning ranges of the thermal radiation sensor 2 and the rotation zero point coordinate axis 32 of the television camera 6 in the present invention, when the rotation of the television camera 6 is stopped in the steady monitoring state, the zero point coordinate axis of the television camera 6 is stopped. 32 is installed so as to coincide with the zero point coordinates of the heat radiation sensor 2 for the warning area.

That is, in FIGS. 5 and 6, the zero point coordinate axis 34 for the caution area of the heat radiation sensor 2 is set to α / 2 which is half the vertical operation angle α.
In the horizontal scanning angle θ shown in FIG. 6, if half of the angle θ / 2 is used as the zero point coordinate axis 34, the rotating zero point coordinate axis 32 of the television camera 6 with respect to the warning area is in the stationary state of the television camera 6. Zero coordinate axis of thermal radiation sensor
It is installed to match 34.

Note that the heat radiation sensor 2 is used in the vertical direction shown in FIG.
Since the installation position between the TV camera 6 and
Although the zero coordinate axes 32 and 34 cannot be made to completely coincide with each other, the zero coordinate axis 32 of the television camera 6 is directed to the intersection Q of the zero coordinate axis 34 of the heat radiation sensor 2 with respect to the monitoring surface 30, so that the monitor television 12 An image of a point Q corresponding to the zero point coordinate axis of the heat radiation sensor 2 can be projected on the screen center P of the. Furthermore, since the distance to the monitoring surface 30 is sufficiently long with respect to the installation distance between the heat radiation sensor 2 and the TV camera 6,
The deviation of the zero coordinate axes 32 and 34 in the vertical direction does not pose a practical problem.

Next, the operation of the above embodiment will be described with reference to the flowchart of FIG.

First, when the power is turned on, the camera controller 9 turns on the electromagnetic clutch 7, rotates the television camera 6 integrally with the heat radiation sensor 2, and turns off the electromagnetic clutch 7 when the zero point position of the heat radiation sensor 2 is reached. . Therefore, even if the TV camera 6 is in any position in the initial state, the block 40
By the processing described above, the television camera 6 comes to a stop at the position where the zero point coordinate axis 34 of the TV camera 6 coincides with the zero point coordinate axis 34 of the heat radiation sensor 2.

Subsequently, the determination block 42 checks whether or not the heat radiation sensor 2 detects a fire. When a fire is detected, the process proceeds to block 44, and when the horizontal rotation position of the heat radiation sensor 2 reaches the zero point coordinate position. The electromagnetic clutch 7 is turned on, and the interlocking rotation of the heat radiation sensor 2 and the television camera 6 shown in block 46 is started.

In the next determination block 48, it is monitored whether or not the horizontal fire detection position is reached after the interlocked rotation. When the horizontal fire detection position is reached, the process proceeds to block 50 and the electromagnetic clutch 7 is turned off. The TV camera 6 is stopped at the horizontal fire source position, at the same time the TV camera is activated, and the monitor TV 12 provided in the monitoring room is powered on.
An image of the fire source position is displayed on the monitor TV 12. Further, in block 52, the television camera 6 oriented horizontally to the fire source position is rotated in the vertical direction based on the vertical fire source position detected by the heat radiation sensor 2 to move in the vertical direction. By the rotation, an image having the screen center P of the monitor television 12 as a fire source is displayed.

In the next determination block 54, it is monitored whether or not the fire detection by the heat radiation sensor 2 continues while the image of the fire source position is displayed on the monitor TV 12, and the fire by the heat radiation sensor is monitored. When the detection output disappears, the process proceeds to block 56, the TV camera 6 is stopped, the power of the monitor TV 12 is turned off, the electromagnetic clutch 7 is turned on, and the interlocked rotation for returning the TV camera 6 to the initial position is started. Returning to block 40, when the zero position is reached, the electromagnetic clutch 7 is disengaged, and the determination block 42 prepares for the next fire detection.

As described above, in the fire monitoring device of the present invention, since the rotation zero point coordinate of the television camera is installed so as to match the zero point coordinate of the heat radiation sensor 2 with respect to the caution area in a stopped state, the heat radiation sensor 2 The coordinates of the fire source position when a fire is detected become the position coordinates for directing the TV camera to the fire source as they are, and the TV camera is quickly started and the video of the fire source is monitored without any special coordinate conversion. It can be displayed on TV.

8 and 9 are explanatory views showing another embodiment of the heat radiation sensor 2 and the television camera 6 used in the present invention. In this embodiment, the television camera 6 is rotated only in the horizontal direction, The feature is that the structure of the rotating mechanism of the television camera is simplified.

That is, the heat radiation sensor 2 is mounted on a rotary post which is rotated by a motor with respect to the gantry 13 so as to be horizontally rotatable, as in the above-described embodiment. In particular, a rotary table 36 is provided above the heat radiation sensor 2 via an electromagnetic clutch, and the television camera 6 is fixedly installed on the rotary table 36.

The internal structure of the embodiment shown in FIGS. 8 and 9 is shown in FIG. 10, and the rotating mechanism for horizontally rotating the heat radiation sensor 2 is the same as that of the embodiment shown in FIG. A turntable in which the TV camera 6 is attached via an electromagnetic clutch 7.
36 will be provided.

The control of the heat radiation sensor and the rotation mechanism of the television camera shown in FIGS. 8 to 10 need only remove the vertical drive portion 8 of the television camera 6 provided in the sensor unit 1 of FIG. Is the flow excluding the vertical rotation processing of block 52 in the flowchart of FIG.

(Effects of the Invention) As described above, according to the present invention, the turning zero point coordinate of the television camera, which is the screen center of the monitor television when the television camera is stopped, matches the zero point coordinate of the fire sensor with respect to the warning area. Since the TV camera is installed in the position, the position coordinates of the fire source when a fire is detected can be used as the position coordinates for directing the TV camera to the fire source as they are, without the need for coordinate conversion. Moreover, the configuration of the control device is simplified, and the time for pointing the television camera to the fire source position can be shortened.

Further, in the present invention, the heat radiation sensor, the television camera and their control units are all incorporated on the side of the sensor unit installed in the vicinity of the warning area, and a monitor is provided in a monitoring room or the like away from the warning area. The signal line connection between the sensor unit and the monitor TV is extremely simple because only a TV needs to be installed, and the arrangement of the device is extremely easy because it is composed of two units, the monitor TV and the sensor unit. It is convenient and the equipment can be installed by simple facility construction regardless of the warning area. Further, when the video signal from the TV camera is transmitted to the monitor TV by a wireless system, the signal line connection between the sensor unit and the monitor TV is completely unnecessary, which facilitates the installation and handling of the device. It can be further facilitated.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention,
FIG. 4 is an explanatory view showing one embodiment of the device configuration of the heat radiation sensor and the television camera used in the embodiment of FIG. 1, and FIGS. 5 and 6 show the installation relationship between the heat radiation sensor and the television camera of the present invention. FIG. 7 is a flow chart showing the control operation of FIG. 1, and FIGS. 8, 9 and 10 are explanatory views showing another embodiment of the device configuration of the heat radiation sensor and the television camera used in the present invention. Is. 1: Sensor unit 2: Thermal radiation sensor (fire sensor) 3: Sensor controller 4: Horizontal drive section 5: Vertical scanning section 6: TV camera 7: Electromagnetic clutch 8: Vertical drive section 9: Camera controller 10: Fire detection section 12 : Monitor TV 13: Frame 14: Rotating base 15: Support post 16: Tilt base 17: Rotating shaft 18: Detection window 20: Rotating post 21,23,25,26: Gear 22,24: Motor 30: Monitoring surface 32, 34: Zero coordinate axis 36: Turntable

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Yoshihiko Ohashi 2-1043 Kamiosaki, Shinagawa-ku, Tokyo Hochiki Co., Ltd. (72) Toshihide Tsuji 2-1043 Kamiosaki, Shinagawa-ku, Tokyo Hochiki Co., Ltd. (72) Inventor Kensuke Miyazaki 2-1043 Kamiosaki, Shinagawa-ku, Tokyo Hochiki Co., Ltd. (56) References JP 61-8060 (JP, A) Actual development Sho 60- 172471 (JP, U)

Claims (1)

[Claims] 1. A fire sensor for detecting a fire in an alarm area by rotationally scanning in the horizontal direction or in the horizontal and vertical directions, and a rotation sensor installed in the vicinity of the fire sensor and stopped at a predetermined position in a steady monitoring state. A fire monitoring device comprising: a television camera which is activated when a detection output of the fire sensor is obtained and is directed in a fire source position direction; and a monitor television which displays an image of the television camera. In the stopped state, the television camera is installed so that the turning zero point coordinate of the television camera, which is the screen center of the monitor television, coincides with the zero point coordinate of the fire sensor with respect to the warning area.