JPH0821148B2 - 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 occurring in a warning area by a fire sensor and a television camera.

(Prior Art) Conventionally, when monitoring a fire in a large space structure such as a ball stadium or an exhibition hall, a thermal radiation sensor that detects radiant heat from a flame due to the fire has been placed at a position overlooking the warning area. Set up,
This heat radiation sensor is used to rotate and scan in the horizontal and vertical directions by the rotating mechanism to monitor the entire warning area, and a TV camera is installed to make it possible to see the situation of the warning area from a remote monitoring room. An apparatus has been proposed in which the television camera is directed to the fire source position at the time of detection, and an image of the fire source position is displayed on the monitor TV.

(Problems to be Solved by the Invention) However, in such a device for monitoring a fire by the conventional heat radiation sensor and the television camera, the heat radiation sensor and the television camera are separately installed. , It is necessary to convert the position coordinates of the fire source detected by the heat radiation sensor to the coordinate positions of the TV camera for direction control, and since the coordinate conversion is required for the direction control of the TV camera, the conversion process becomes complicated. As a result, the device cost becomes high, and depending on the stop position of the TV camera, it takes time to direct the fire source. Further, even if the television camera is directed to the fire source position, it is difficult to find the fire source position from the monitor screen when the fire source is small.

(Means for Solving Problems) The present invention has been made in view of such problems in the related art, and simplifies the device configuration by eliminating the need for coordinate conversion for the pointing control of the television camera when a fire is detected. In addition, it is an object of the present invention to provide a fire monitoring device in which the fire source position can be easily and easily found from the monitor screen.

To achieve this object, in the present invention, the optical axis direction of the fire sensor is substantially the same, and the horizontal rotation angle of the fire sensor is synchronized with the vertical center line of the monitor screen in synchronization with the fire sensor. Turn the TV camera only in the horizontal direction and stop the horizontal rotation of the TV camera when a fire is detected, and plot the fire source position on the vertical center line of the monitor screen based on the vertical detection angle of the fire sensor. It was done.

(Embodiment) FIG. 1 is an explanatory view showing an embodiment of the present invention.

First, the configuration will be described. 1 is a sensor unit installed in the vicinity of the monitoring area, which has a heat radiation sensor 3 as a fire sensor that is mechanically rotated horizontally by a horizontal drive unit 2. In the example, the thermal radiation sensor 3 is made to be simultaneously electrically scanned by the vertical scanning unit 4 in the vertical direction. A television camera 6 is mechanically connected to the horizontal drive unit 2 of the thermal radiation sensor 3 via an electromagnetic clutch 5, and by turning on the electromagnetic clutch 5, the television camera 6 synchronizes with the radiation sensor 3. When the electromagnetic clutch 5 is turned in the horizontal direction and the electromagnetic clutch 5 is turned off, the turning of the television camera 6 is stopped.

2 and 3 are explanatory views showing a specific embodiment of the sensor unit 1 shown in FIG. 1, and a partial sectional view of the internal mechanical structure of FIG.

In FIGS. 2 and 3, 11 is a fixed base, and a drive box 12 having a built-in drive motor is provided on the fixed base 11.
The heat radiation sensor 3 is installed on the rotary shaft taken out from the drive box 12, and the rotary base 13 is mounted on the upper part of the heat radiation sensor 3 via an electromagnetic clutch. A TV camera 6 is installed toward the surveillance area. As shown in FIG. 3, the heat radiation sensor 3 has a detection window 14 opened toward a monitoring area diagonally below, and a rotation mirror which is rotated at a constant speed by a motor is incorporated in the detection window 14. Therefore, the optical image in the range of the detection window 14 in the vertical direction by the rotating mirror is made incident on the detection element to perform the scanning in the vertical direction. Of course, the thermal radiation sensor 3
Alternatively, it may be one that mechanically performs rotational scanning in the vertical direction.

Next, the internal mechanical structure of the sensor unit shown in FIGS. 2 and 3 will be described. As shown in FIG. 4, the tip of the rotating post 16 is placed between the fixed post 15 mounted on the upper portion of the fixed base 11. It is rotatably mounted via a thrust bearing, etc., a gear 17 is integrally formed on the rotary post 16, and a gear 19 provided on the output shaft of a motor 18 fixed to the fixed base 11 meshes with this gear 17. A pulse motor is used as the motor 18, and the rotation post 16 is rotated in the horizontal direction at predetermined steps by meshing with the gears 19 and 17. The heat radiation sensor 3 is mounted on the upper part of the rotating post 16, and the rotary base 13 on which the TV camera 6 is mounted on the upper part of the rotating post 16 via the electromagnetic clutch 5.
Is provided.

Referring again to FIG. 1, each of the horizontal driving unit 2 and the vertical scanning unit 4 provided in the sensor unit 1 receives the control signal from the controller 7 to move the heat radiation sensor 3 horizontally and vertically in the entire warning area. , And the controller 7 controls ON / OFF of the electromagnetic clutch 5 for horizontally rotating the television camera 6 in synchronization with the heat radiation sensor 3.

Further, the detection signal of the heat radiation sensor 3 is given to the fire detection unit 8. When the detection signal from the heat radiation sensor 3 exceeds a threshold level for determining a predetermined fire, the fire detection unit 8 causes the controller 7 to operate. And a fire detection signal is output to each of the monitor controllers 9.

The controller 7 automatically controls the drive of the horizontal drive unit 2 and the vertical scan unit 4 so that the heat radiation sensor 3 covers the entire predetermined monitoring area. Further, the controller 7 turns on the electromagnetic clutch 5 when the horizontal scanning angle of the thermal radiation sensor 3 coincides with the optical axis direction of the television camera 6, and makes the thermal radiation sensor 3 and the horizontal scanning axis of the television camera 6 coincide with each other. Is interlocked with. Further, when the controller 7 receives the fire detection signal from the fire detection unit 8, the electromagnetic clutch 5 is turned off and the television camera 6 is stopped in the state of being directed to the fire detection position.

The monitor controller 9 displays the video signal from the TV camera 6 on a monitor TV 10 installed in a monitoring room or the like apart from the warning area, and when the fire detection unit 8 receives a fire signal, the heat radiation sensor 3 is vertically moved. For vertical scanning, the vertical scanning control signal output from the controller 7 is read into the vertical scanning unit 4, the vertical detection angle of the fire source by the thermal radiation sensor 3 is obtained based on this control signal, and based on this vertical detection angle Thus, the fire source position is plotted and displayed on the vertical center line of the monitor screen of the monitor television 10.

Next, the television camera 6 when turning on the electromagnetic clutch 5 and rotating only in the horizontal direction in synchronization with the heat radiation sensor 3
The relationship between the monitor screen and the horizontal detection angle of the thermal radiation sensor 3 will be described.

FIG. 5 shows the installation state of the sensor unit 1 of the present invention in the monitoring area, and FIG. 6 is a plan view thereof.

Regarding the horizontal rotation of the TV camera in the steady monitoring state in synchronization with the heat radiation sensor 3, as shown in FIGS. 5 and 6, the directional center axis 20 of the heat radiation sensor 3 and the TV camera 6 in both the vertical and horizontal directions. The optical axes 22 are made to coincide with each other, and as a result, the monitor screen of the monitor TV 10 obtained by the horizontal rotation of the television camera 6 synchronized with the thermal radiation sensor 3 is always the thermal radiation sensor as shown in FIG. The vertical scanning position of 3 comes to coincide with the vertical center line 24 on the monitor screen 10a.

Incidentally, in FIG. 5, the heat radiation sensor 3 and the television camera 6
Although there is a slight deviation in the installation interval between and, since this is a sufficiently long detection distance with respect to the monitoring surface 25 in the caution area, such a positional deviation can be practically ignored.

The monitor screen 10a in FIG. 7 shows an example in which the vertical center line 24 is projected on the monitor screen 10a. However, the vertical center line 24 does not have to be projected as an image, and it is directly centered on the surface of the monitor screen. You can draw lines.

FIG. 8 shows the monitor screen 10a of the monitor TV 10 when the heat radiation sensor 3 detects a fire. The monitor controller 9 causes the vertical center line 24 based on the vertical detection angle of the fire source of the heat radiation sensor 3 to be detected. The fire source 26 will be plotted at the position of.

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

When the power of the apparatus is turned on, first, in block 30, when the horizontal central axis 20 of the heat radiation sensor 3 coincides with the optical axis of the television camera 6 in the horizontal direction, the controller 7 turns on the electromagnetic clutch 5 to release the heat radiation. The television camera 6 is rotated only in the horizontal direction in synchronization with the sensor 3.
At this time, as shown in FIG. 7, when the horizontal rotation angle of the heat radiation sensor 3 and the vertical center line 24 of the monitor screen match on the monitor screen 10a of the monitor TV 10, the control rotation of the TV camera 6 is performed. Images of the surveillance area will be displayed.

In the next determination block 32, the presence or absence of fire detection is determined from the detection signal of the heat radiation sensor 3. When a fire is detected, the process proceeds to block 34, the electromagnetic clutch 5 is turned off, and the horizontal direction of the heat radiation sensor 3 is detected. The television camera 6 is separated from the rotation, and the television camera 6 is stopped with the television camera 6 being directed to the fire detection position.

Subsequently, in block 36, the vertical detection position of the fire source detected by the heat radiation sensor 3, that is, the vertical detection angle
As shown in the figure, the fire source 26 is displayed as a plot on the vertical center line 24 of the monitor screen 10a by the television camera 6 which has stopped rotating. By the plot display of the fire source 26 on the monitor screen 10a, the operator can immediately know which position on the monitor screen 10a is on the fire source, know the fire source position, and promptly take measures for initial extinction and appropriate evacuation guidance. You can take it.

If the plot display of the fire source is performed in block 36, it is checked in the next determination block 38 whether the fire detection state by the heat radiation sensor 3 is continuing, and the fire detection output is cut off. Then, the process returns to the block 30 again, and the electromagnetic clutch 5 is turned on at the timing when the optical axis of the television camera 6 in the stopped state and the horizontal scanning angle of the thermal radiation sensor 3 which is rotationally scanned coincide with each other, and the thermal radiation sensor 3 is turned on again. The synchronized horizontal rotation of the television camera 6 is performed.

In the above embodiment, the monitor image is always displayed when the television camera 6 is horizontally rotated in the steady monitoring state, but as another embodiment, the monitor television 10 is displayed when the fire detection output is obtained. Alternatively, the TV camera 6 may be activated to display a fire source image. In addition, it is desirable that the operator be alerted to issue a fire alarm at the place where the monitor TV 10 is installed at the same time as the fire is detected, and to watch the monitor TV showing the fire source position.

Further, a controller 7, a fire detection unit 8 and a monitor controller 9 are installed on the sensor unit 1 side of FIG.
By dividing the device into two units so that the video signal from the monitor controller 9 can be transmitted to the monitor television 10 installed in a monitoring room or the like by a coaxial cable or wirelessly, the installation work can be facilitated and the device can be installed easily. The handling can be simplified.

(Effect of the invention) As described above, according to the present invention, a fire sensor for detecting a fire in a monitoring area by horizontal and vertical rotation scanning, and the fire sensor and the optical axis direction are substantially the same,
In addition, the TV camera is rotated only in the horizontal direction in synchronization with the fire sensor so that the horizontal rotation angle of the fire sensor matches the vertical center line of the monitor screen, and when the fire is detected, the synchronous rotation is released and the television camera is stopped. When the fire is detected, the fire source display means for plotting and displaying the fire source position on the vertical center line of the monitor screen based on the fire sensor vertical detection angle is provided. It is possible to display an image of the surveillance area in which the horizontal scanning angle of the fire sensor being scanned is aligned with the vertical center line of the monitor screen.

Also, when the fire source is detected, the rotation of the TV camera is stopped, and it can be stopped with the TV camera pointing to the fire source position without performing coordinate conversion. Furthermore, the fire sensor fires on the vertical center line of the monitor screen. Since the plot display showing the fire source position is performed based on the vertical detection angle of the source,
Even if the fire source is small and it is difficult to identify the fire from the monitor image, you can immediately know the fire source position from the monitor screen by the fire source plot display, and take appropriate measures for initial digestion and evacuation guidance. Can be taken quickly.

[Brief description of drawings]

FIG. 1 is an explanatory view showing an embodiment of the present invention, and FIGS. 2, 3 and 4 are explanatory views showing a concrete embodiment of a sensor unit.
FIG. 6 is an explanatory diagram showing the relationship between the heat radiation sensor and the television camera with respect to the monitoring area, FIGS. 7 and 8 are explanatory diagrams of the monitor display state, and FIG. 9 is a flowchart showing the control processing of the present invention. 1: Sensor unit 2: Horizontal drive part 3: Thermal radiation sensor (fire sensor) 4: Vertical scanning part 5: Electromagnetic clutch 6: TV camera 7: Controller 8: Fire detection part 9: Monitor controller 10: Monitor TV 10a: Monitor Screen 11: Fixed base 12: Drive box 13: Rotating base 14: Detection window 15: Fixed post 16: Rotating post 17, 19: Gear 18: Motor 20: Sensor-oriented central axis 22: Optical axis 25: Monitoring surface 24: Vertical Central axis 26: Fire source plot display

Front page continuation (72) Inventor Yoshihiko Ohashi 2-1043 Kamiosaki, Shinagawa-ku, Tokyo Ho Chiki Co., Ltd. (72) Inventor Toshihide Tsuji 2-1043 Kamiosaki, Shinagawa-ku, Tokyo Ho Chiki Shares In-house (72) Inventor Kensuke Miyazaki 2-1043 Kamiosaki, Shinagawa-ku, Tokyo Hochiki Co., Ltd. (56) Bibliography Sho 61-80060 (JP, U)

Claims (1)

[Claims] 1. A fire sensor for detecting a fire in a warning area by rotational scanning in horizontal and vertical directions, an optical axis direction of the fire sensor is substantially the same, and a horizontal rotation angle of the fire sensor and a monitor screen. It is rotated only in the horizontal direction in synchronization with the fire sensor so that the vertical center lines of the
A television camera that stops rotating when a fire is detected, and a fire source display means that plots and displays the fire source position on the vertical center line of the monitor screen based on the fire source vertical detection angle of the fire sensor when a fire is detected Fire monitoring device characterized in that.