JPH04286097A - Fire alarm - Google Patents

Abstract

PURPOSE:To provide the fire alarm reporting the fire generation quickly and accurately. CONSTITUTION:A background picture memory part 2 and picture memory part 3 are connected to an image pickup part 1. A differential calculation part 4 is connected to the background picture memory part 2 and the picture memory part 3. A differential memory part 5 is connected to the differential calculation part 4. A color detection part 7a is connected to the differential memory part 5. A color decision part 7b is connected to the color detection part 7a. A color information storage part 8 and an alarm part 9 are connected to the color decision part 7b. Thus, the fire alarm detecting the flame of fire and reporting the fire generation accurately and quickly can be obtained.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fire alarm system for notifying a fire.

0002

2. Description of the Related Art A conventional fire alarm system, as shown in FIG. 5, is comprised of a temperature sensor 21 and an alarm section 22 installed on a ceiling or the like.

[0003]The above fire alarm system includes a temperature sensor 2.
If the temperature detected by 1 exceeds a predetermined temperature, it will alert you that a fire has occurred.

0004

[Problems to be Solved by the Invention] However, with the above-mentioned conventional configuration, it is not possible to notify unless the temperature near the temperature sensor installed on the ceiling or the like exceeds the set temperature.
If the set temperature is too low, a malfunction will occur in which a fire alarm will be notified even though there is no fire, and if the set temperature is too high, it will be recognized as a fire even though there is a fire. There was a problem that this could lead to an extremely dangerous situation in which the notification was not received or the notification was delayed.

An object of the present invention is to solve the above-mentioned problems and provide a fire alarm system that promptly and accurately notifies that a fire has occurred.

[0006]

[Means for Solving the Problems] In order to achieve the above object, the fire alarm device of the present invention connects a background image memory section and a current image memory section to an imaging section, and connects the background image memory section and the developing memory section. A difference calculation unit is connected to the difference calculation unit, a difference memory unit is connected to the difference calculation unit, a color detection unit is connected to the difference memory unit, a color judgment unit is connected to the color detection unit, and a color judgment unit is connected to the color judgment unit. The configuration is such that the color information storage section and the notification section are connected.

[0007]

[Operation] With the above configuration, the present invention extracts a difference image, that is, a moving object, from the current image and background image photographed by the imaging section, then detects the color of the moving object in the color detection section, and then detects the color of the moving object in the color detection section. Compare the detected color with the preset flame color,
It is determined whether the color of the moving object matches the color of the flame, and if it is determined that the moving object is flame, it is determined that a fire has occurred and the alarm section is activated.

[0008]

[Example] Hereinafter, an example of the present invention will be shown in Figs. 1, 2, and 3.
Explain with reference to.

In FIG. 1, 1 is an imaging section, and 2 is an imaging section 1.
a background image memory section for storing a background image input from 3;
4 is a current image memory unit that stores the current image input from the image capturing unit 1; 4 is a difference calculation unit that calculates the difference between the background image in the background image memory unit 2 and the current image in the current image memory unit 3;
is a difference image memory section that stores the difference image calculated by the difference calculation section 4; The background image memory section 2, the current image memory section 3, the difference calculation section 4, and the difference image memory section 5 constitute a moving object extraction section 6. 7a is a color detection unit that detects the color information of the moving object extracted by the moving object extraction unit 6, that is, the content of the differential image memory unit 5; 7b is a color that compares and determines the information in the color information storage unit 8 and the information in the color detection unit 7a. This is the judgment section. Reference numeral 9 denotes a notification section that notifies of a fire based on the output from the color determination section 7b.

The operation of the above configuration will be explained based on the image schematic diagrams of FIGS. 2 and 3. A background image 10a (the example shows a state in which only a table 14h exists in the room) is inputted by the imaging section 1, and the background image 10a is stored in the background image memory section 2. Next, the current image 11a is inputted by the imaging section 1, and the current image 11a is stored in the current image memory section 3. After that, in the difference calculation unit 4, the current image 11
A difference calculation is performed between a and the background image 10a. In the difference image 12a obtained here, the table 14h and the table 14g cancel each other out, and since the moving object 13 does not exist in the current image 11a, nothing is extracted as a result of the difference calculation. After that, as shown in FIG. 3, when the moving object 13a appears in the current image 11b, the difference calculation unit 4 compares the current image 11b and the background image 10b.
A difference image 12b is obtained by calculating the difference image. At this time, the table 14h and the table 14g cancel each other out, but since the moving object 13a exists in the current image, the moving object 13s is extracted. Next, it is determined whether or not the moving object 13s is a flame by comparing the color information of the moving object 13s with the flame color information stored in the color information storage section 8 in the color determination section 7b. If it is determined that there is a flame, a signal is sent to the notification section 9 to notify that a fire has occurred.

According to the configuration of this embodiment, only a moving object is extracted by calculating the difference between the background image and the current image taken by the imaging unit, and the color of the moving object is determined.
It has the effect of being able to notify you of the occurrence of a fire more quickly and reliably than conventional fire alarms.

FIG. 4 shows a second embodiment, which differs from the first embodiment in that it not only notifies the fire, but also directs the extinguishing agent outlet of the fire extinguishing equipment such as the water nozzle to the imaging unit 1. The point is that the fire extinguishing device drive section 15, which is moved toward the fire occurrence point detected by the above, is connected to the difference calculation section 4.

In the process of obtaining the moving object 13s, the fire extinguishing device drive unit 15 calculates the center of gravity of the flame on the screen by the center of gravity detection unit 16, and directs the discharge port in the direction of the actual flame by the rotation angle calculation unit 17. A stepping motor 1 is attached to rotate the motor horizontally and vertically.
8 rotation angles are calculated, and the drive unit 19 drives the rotation.

According to the configuration of this embodiment, the position information of the flame can be obtained from the imaging section 1, and the direction of the water spray nozzle can be controlled toward the source of the fire, so that the sprinkler can be used to spread the water into the room. This method is more effective at extinguishing a fire than the traditional fire extinguishing method of sprinkling water, and it also minimizes damage caused by flooding.

[0015]

Effects of the Invention As explained above, the fire alarm device of the present invention detects flames from the color of a moving object extracted by the imaging unit and notifies the occurrence of a fire, so it is faster and more accurate than conventional fire alarm devices. This has the effect of notifying the occurrence of a fire.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram of a fire alarm device according to an embodiment of the present invention.

FIG. 2 is a schematic image diagram as well.

FIG. 3 is a schematic image diagram as well.

FIG. 4 is a configuration diagram of a fire alarm device in a second embodiment of the present invention.

FIG. 5 is a configuration diagram of a conventional fire alarm device.

[Explanation of symbols]

1 Imaging section 2 Background image memory section 3 Current image memory section 4 Difference calculation section 5 Differential memory section 7a Color detection section 7b Color judgment section 8 Color information storage section 9 Notification Department 16 Center of gravity detection section 17 Rotation angle calculation section 18 Stepping motor 19 Drive section

Claims (2)

[Claims] Claim 1: A background image memory section and a current image memory section are connected to an imaging section, a difference calculation section is connected to the background image memory section and the development memory section, and a difference memory section is connected to the difference calculation section. , a fire alarm device in which a color detection section is connected to the difference memory section, a color determination section is connected to the color detection section, and a color information storage section and a notification section are connected to the color determination section. [Claim 2] A center of gravity detection unit of a moving object is connected to the difference calculation unit,
2. The fire alarm system according to claim 1, further comprising: a rotation angle calculating section of a stepping motor connected to the center of gravity detecting section; a driving section of the stepping motor connected to the rotation angle calculating section; and a stepping motor connected to the driving section.