JPH07182579A - Fire detector - Google Patents

Abstract

PURPOSE:To correctly grasp the situation of a site take proper measures even in the case of a fire with much smoke by providing an image pick-up device which is formed integrally with a sensor and photographs a spot under the sensor. CONSTITUTION:When smoke flows in through a smoke inflow port and it becomes not less than a prescribed value, a detection part 5 judges the state to be the breaking out of fire and alarms. Then, at the same time of alarming, a signal indicating the start of photographing is transmitted to the control part 12 of the image pickup device 6 as well. At the time of receiving it, the control part 12 light-controls an illuminating lamp 11 and starts photographing by an image pickup element 7. When photographing like this is started, an image is obtained concerning the range of the lower angle theta of the fire alarm 1. Namely, the state of the fire source is directly seen and the movement of a person within the range can clearly be grasped with it. Consequently, the proper measures corresponding to the situation of the site can be taken at a disaster prevention center, etc., while watching this video.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fire detector for detecting and issuing a fire by detecting heat, smoke, etc.
In particular, the present invention relates to a fire detector in which an image pickup device is incorporated in the fire detector main body so that an image of a surveillance area can be directly obtained.

[0002]

2. Description of the Related Art Conventionally, this type of fire detector detects heat, smoke, and the like, and outputs the detected data as it is, or when a detected value exceeds a predetermined value, the fire occurrence is reported and It was responsible for sending the detection data to the receiver side. On the other hand, understanding the situation in the monitored area at the time of a fire is also extremely effective in disaster prevention measures, and a TV camera that monitors the situation in the monitored area is installed in the corner of the room to further strengthen the disaster prevention system. Many systems are found.

[0003]

However, in such a conventional fire detector, although the heat and smoke are detected and the data thereof are transmitted, only the data transmission and the reception are performed. There was a problem on the aircraft side that it was not possible to obtain more detailed data on the situation in the surveillance area. Further, even when the TV camera is installed as described above to overcome the drawback, the location of the sensor and the position of the TV camera are not necessarily close to each other, and the vicinity of the reported sensor is not always detected. There were cases where the situation could not be fully grasped. In particular, when smoke is full, even if you zoom in on the vicinity of the sensor that issued the alarm, there is no view from the corner of the room, and there is a TV camera and there is a fire situation. There was a problem that I could not grasp at all. Also, even if you try to take a picture of the vicinity of the sensor issued by the TV camera, the TV camera and the sensor are completely independent, so you could only do it if you were quite familiar with the equipment. .

The present invention has been made to solve the above problems, and an object of the present invention is to provide a fire detector capable of directly and accurately grasping the situation of a fire site.

[0005]

In order to solve the above problems, a fire detector according to a first aspect of the present invention comprises a detector for detecting heat, smoke, etc., and the detector detects the occurrence of a fire in a predetermined monitoring area. In the fire detector for detection, an image pickup device for taking an image below the fire detector is provided below the detection unit.

Further, in the present invention of claim 2, the image pickup device photographs the lower part of the fire detector only when a fire is detected in the detection section. In the present invention of claim 3, the fire detector main body. Or separately from the above fire detector body,
A configuration is provided in which an illumination device that illuminates the shooting range of the above-described imaging device is provided.

[0007]

Embodiments of the present invention will now be described with reference to the drawings. FIG. 1 is a diagram showing an outline of an internal configuration of a fire detector according to the present invention, and FIG. 2 is a diagram showing its outer shape. In the present embodiment, the case where the present invention is applied to a so-called smoke detector is shown.

According to the present invention, an image pickup device is provided in a part of the fire detector so that the situation below the fire detector can be grasped in detail even from a distance. The fire detector 1 of the present embodiment is arranged in the monitoring area by attaching the detector body 2 to the detector base 3 provided on the ceiling or the like. As shown in FIG. 2, the sensor main body 2 is provided with a smoke inlet 41 for allowing smoke to flow into the side of the outer cover 4, as in a normal smoke detector. The detection unit 5 detects smoke that has entered through the inlet 41. Details of this are omitted because they are similar to those of the conventional sensor.

In the present embodiment, in addition to this, an image pickup device 6 is provided below the detection unit 5 to take an image below the fire detector 1. The imaging device 6 is
The image pickup device 7 includes a lens 8, a video signal processing unit 9, a filter 10, an illumination lamp 11, and a control unit 12. Here, a CCD or an infrared sensor is used for the image pickup element 7, and the CCD can grasp an actual image of the monitoring area, and the infrared sensor can grasp a fire source, a movement of a person, or the like. In this case, with the infrared sensor, the state of the fire source can be grasped from the close position even when the smoke is full. A wide-angle lens is used as the lens 8,
This imaging device 6 can capture an image in a range shown by an angle θ in FIG. 1, which is slightly wider than the monitoring area of the fire detector 1. In this case, the image pickup device 6 may be mounted on a driving unit, and the driving unit may be driven remotely or automatically to direct the photographing range toward the fire source or the person.

On the other hand, the video signal processing section 9 processes the video signal obtained by the image pickup device 7 and sends it to a receiver or the like. Reference numeral 12 denotes a control unit, which receives an alarm output from the detection unit 5 and starts image capturing by the image sensor 7 and controls lighting of the illumination lamp 11. Thirteen
Is a circuit board on which the video processing unit 9, the image pickup device 7, and the like are mounted. Further, in the present embodiment, a filter 10 is provided on the front surface of the lens 8 and a lower portion of the outer cover 4 is provided at the bottom of the outer cover 4 at the time of photographing for wavelength adjustment and lens protection when an infrared sensor is used as the image pickup device 7. An illumination lamp 11 is provided to illuminate.

Next, the operation when the fire detector of this embodiment actually detects a fire will be described. First, smoke flows in from the smoke inlet 41, and when it exceeds a certain value, the detection unit 5 determines that a fire has occurred and issues a warning. At this time, at the same time as this notification, a signal to the effect that photography should be started is also issued to the control unit 12 of the imaging device 6. Then, in response to this, the control unit 12 controls the lighting of the illumination lamp 11 and causes the image pickup device 7 to start photographing. The image pickup device 6 of the fire detector 1 operates only when the detector issues a warning from the viewpoint of privacy protection. However,
The detection unit 5 may be provided with a pre-alarm level so that shooting is started when the smoke density exceeds the pre-alarm level. In this way, the fire can be dealt with earlier.

When the photographing is started in this way, as shown in FIG. 3, the range of the lower angle θ of the fire detector is shown in FIG.
An image as shown in is obtained. That is, it is possible to directly see the state of the fire source 12 and also to clearly grasp the movement of a person within the range. Then, while watching this video, it becomes possible to take appropriate measures in a disaster prevention center (not shown) or the like that suits the situation at the site, and it is possible to further strengthen the disaster prevention system.

In the present embodiment, the notification of the fire detector 1 alone has been described, but in the case where a plurality of detectors are issued, for example, the disaster prevention center switches each image. As a matter of course, it is possible to construct a system capable of grasping more accurate information by displaying a plurality of screens.

Further, although the image pickup device 6 is provided in the lower portion of the sensor main body 2, it goes without saying that the place can be changed appropriately. Further, the illumination lamp 11 may be provided separately from the sensor main body 2, and its operation is not limited to when the alarm signal is received, and can be operated by remote control from the disaster prevention center side. The indoor brightness may be detected and automatically turned on. In addition, in the present embodiment, the image pickup device 6 operates only when the sensor issues a warning from the viewpoint of privacy protection, but it may be configured to operate appropriately according to a command from the disaster prevention center side. Of course you can.

[0015]

As described above, according to the fire detector of the present invention of claim 1, since the image pickup device for photographing the lower portion of the fire detector is provided integrally with the fire detector, it is possible to detect the fire of the detector. The effect is that the situation in the vicinity of the sensor can be grasped directly and accurately. Therefore, even in the case of a fire with a lot of smoke, it is possible to accurately grasp the situation at the site and take appropriate measures.

According to the second aspect of the present invention, since the image pickup device is operated only when the sensor is issued, the fire monitoring can be enhanced without damaging the privacy in the monitoring area. The effect is that you can do it.

Further, according to the present invention of claim 3, by providing an illumination lamp for illuminating the lower side of the sensor, a clearer image can be obtained in the surveillance area.
In particular, there is an effect that the monitoring function is not impaired even at the time of power failure.

[Brief description of drawings]

FIG. 1 is a diagram showing a schematic configuration of an embodiment of a fire detector according to the present invention.

FIG. 2 is a diagram showing an appearance of the fire detector of FIG.

3 is an explanatory diagram showing a fire monitoring operation of the fire detector of FIG. 1. FIG.

4 is a diagram showing an example of an image obtained by the fire detector of FIG.

[Explanation of symbols]

 1 Fire Detector 2 Detector Main Body 5 Detecting Section 6 Imaging Device 7 Imaging Element 8 Lens 9 Video Signal Processing Section 10 Filter 11 Illumination Lamp 12 Control Section

Claims (3)

[Claims] 1. A fire detector comprising a detection unit for detecting heat, smoke, etc., for detecting the occurrence of a fire in a predetermined monitoring area by the detection unit, wherein the fire detector is provided below the detection unit. A fire detector comprising an imaging device for photographing the lower part of the fire detector. 2. The fire detector according to claim 1, wherein the imaging device captures an image below the fire detector only when the detector detects a fire. 3. The fire detector according to claim 1, further comprising a lighting device for illuminating a photographing range of the image pickup device, which is provided separately from the fire detector main body or the fire detector main body.