JPH01268575A - Fire extinguisher - Google Patents

Abstract

PURPOSE:To properly take the image of a fire source and jet fire extinguishing agent concentri cally to the fire source and extinguish fire properly, by detecting the difference section of flame image signals stored in first and second memories, and by detection-processing the center of the detected difference section. CONSTITUTION:A first memory 5 is positioned in a control section 4, and the one flame component of flame image signal (d), the image of which is taken by a monitoring camera 3 is stored. In a second memory 6, the one flame component of the flame image signal (d), the image of which is taken by the monitoring camera 3 of motion slow more than that in case of the first memory 5 is stored. By a change point detecting section 7, the contents of the flame image signals (d) with a time difference which are stored in the first and second memories 5, 6 are compared with each other, and a change quantity due to the difference of signal in a flame area is detected, and it is discriminated whether there is flame or not, and by a centering processing section 8, the center position of the flame area detected by the change point detecting section 7 is processed. By a fire extinguishing nozzle controlling section 9, control signal (e) from a control section 4 is received, and driving signal (f) for moving a nozzle vertically and horizontally so that the detected flame center may coincide with the center of a fire extinguishing nozzle 10 is transmitted, and the fire extinguishing nozzle 10 is always controlled to be positioned directed to the center of flame, and fire extinguishing agent is jetted.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a fire extinguishing system used in the field of disaster prevention.

Conventional technology Conventionally, the monitoring range is divided into blocks, each block is equipped with one or more detectors, the fire detector detects a fire occurring within the block, and this detection signal is supplied to the control unit. It has become. The control unit executes a fire extinguishing operation within the block based on the sensing signal.

Problems to be Solved by the Invention Accordingly, it has been difficult to grasp the exact location of a fire and the fire situation (confirming whether or not there is a fire), making it impossible to carry out appropriate firefighting operations.

In the present invention, when a fire occurs, a video signal captured by a surveillance camera is immediately processed by a control unit to confirm the position of the flame, the size of the flame, etc. The purpose of this system is to automatically control surveillance cameras and fire extinguishing nozzles based on the processing results to accurately capture images of the source of the fire and spray extinguishing agent intensively at the source of the fire to accurately extinguish the fire.

SUMMARY OF THE INVENTION To solve this problem, the present invention detects a fire,
a fire detector that sends this detection signal to a control unit; a camera control unit that receives a control signal from the control unit and sends a flame image signal to the control unit; and a camera control unit that moves a surveillance camera; a fire extinguishing nozzle control unit that receives the signal and moves the fire extinguishing nozzle; the control unit includes a memory @1 that sequentially stores flame video signals from the surveillance camera;
a second memory that sequentially stores flame video signals from the surveillance camera after a predetermined period of time; and a change check that detects differences between the flame video signals stored in the first and second memories. It is composed of an output section and a centering processing section that detects the center of the difference portion detected by the change point detection section.

Function The present invention detects a fire using a fire detector and a surveillance camera, and processes the flames (what appears to be flames) captured by the surveillance camera to an image processing section (first memory, second memory, change point detection section) in the control section. Perform flame confirmation processing (shaking processing). When a flame is confirmed, a centering processing section controls the movement of the monitoring camera and extinguishing nozzle so that they are positioned at the center of the flame, thereby ensuring appropriate extinguishment.

EXAMPLE Hereinafter, an example of the present invention will be explained using the drawings of FIGS. 1, 2, and 3.

In FIG. 1, numeral 1 is a fire detector that detects infrared and ultraviolet light emitted from flames using an infrared sensor, an ultraviolet sensor, etc., and determines that there is a fire.

The determination result is sent to the control unit 4 as a sensing signal a.

Reference numeral 2 denotes a camera control unit, which is a circuit that receives control signals from the control unit 4 and controls the surveillance camera 3. Specifically, it monitors so that the center of the detected flame and the center of the surveillance camera 3 coincide. Together with the camera 3 and a fire extinguishing nozzle 10, which will be described later, it sends out a drive signal C and the like for moving vertically and horizontally.

Further, when the fire detector 1 is activated, a power-on instruction signal is sent from the control unit 4 to the camera control unit 2 via the control signal C, and the camera control unit 2, which has received this signal, sends a power-on instruction signal to the surveillance camera 3 via the drive signal C. Power on. The control section 4 has a built-in microcomputer and performs interface processing with each section. 6 is a first memory located within the control unit 4;

One frame of the flame video signal d captured by the surveillance camera 3 (
This is a circuit that stores a signal obtained by converting an analog flame video signal d into a digital signal. Reference numeral 6 denotes a second memory, which is located in the control unit 4 like the first memory 6, and which captures flames captured by the surveillance camera 3 later in time (several seconds later) than one frame stored in the first memory 6. The video signal d is stored in the same manner as one frame of the video signal d is stored in the first memory 6. Reference numeral 7 denotes a change point detection unit, which compares the contents of the flame video signal d with a time difference stored in the first memory 6 and the second memory 6, and determines the flame area (the range of signals corresponding to flame in the memory). The amount of change due to the difference in the signal is detected and it is determined whether there is a flame or not. 8
is a centering processing section, which is a circuit that processes the center position of the flame area detected by the change point detection section 7. Reference numeral 9 denotes a fire extinguishing nozzle control unit, which is a circuit that receives the control signal e from the control unit 4 and controls the fire extinguishing nozzle 10. Specifically, the circuit controls the fire extinguishing nozzle 10 so that the center of the detected flame matches the center of the extinguishing nozzle 10. A drive signal f is sent to move it vertically and horizontally. The extinguishing nozzle 1o is always controlled to be positioned toward the center of the flame, and injects extinguishing agent.

Next, the specific operation will be explained.

First, when a fire occurs, the fire detector 1 detects infrared light or ultraviolet light emitted from the flame, and sends a sensing signal a to the control unit 4.3, the sensing signal a is shown to a person in FIG. The control section 4 having a built-in microcomputer (not shown) that has received the sensing signal sends the control signal to the camera control section 2 with a power-on signal for the surveillance camera 3 added thereto. The camera control signal is shown in Figure 3. The camera control unit 2, which has received the control signal C, sends a drive signal C to turn on the power of the surveillance camera 3.
Send out. The surveillance camera 3 receives the drive signal C and sends a flame image signal d to the control section 4. C in FIG. 3 shows the flame image signal d. The control unit 4 that has received the flame image signal d instructs the first memory 6 to capture the signal. The first memory 6 sequentially stores one frame of the flame video signal d. FIG. 3D shows the loading state of the first memory 6. Note that when capturing the flame video signal d, a signal obtained by converting an analog signal into a digital signal is stored. next.

After a predetermined period of time (for example, a period in which a change in flame movement can be detected in about 1 to 2 seconds), one frame is imported in the same manner as the flame video signal d is imported into the first memory 6. Accumulate the amount of time sequentially. Figure 3 shows the state of memory loading. Next, the change point detection section 7 detects the difference between the digitized flame image signals taken into the first memory 6 and the second memory 6 with a time difference. Here, a method of detecting a change point will be specifically explained. First, it is checked whether there is a flame in the data stored in the first memory 6.

Assuming that data is stored in the first memory 6 as shown in FIG. 2 ILZ1, the change point detection unit 7 sequentially supplies read addresses to the first memory 6 and sequentially scans in the X direction/Y direction. do. Detects the flame position while sequentially scanning and cuts out the area corresponding to the flame. The rectangular area shown in Figure 2&z11 indicates the flame range. Next, it is checked whether there is a flame in the data stored in the second memory 6. Similarly to checking the first memory 6, FIG.
Assuming that data is stored in the second memory 6 as shown in FIG. 2, the change point detection unit 7 sequentially supplies read addresses to the second memory 6 and sequentially scans in the X direction/Y direction. Detects the flame position while sequentially scanning and cuts out the area corresponding to the flame.

The square area shown in FIG. 2 2123 indicates the flame range.

Next, the flame was cut out by the above-mentioned operation as shown in Fig. 2 aZ11.
The two areas shown in bZ22 are combined (OR). Second
The state is shown in O2123 in the figure. The same address data stored in the first memory 6 and second memory 6 corresponding to the combined area position is checked and differences are compared.

compared. As a result, when a difference is determined in the shaded area indicated by OZ3 in FIG. 2, it is determined whether the difference is larger or smaller than a predetermined number of change points. The predetermined number of change points is set in advance to a value according to the cutout area. Judgment result,
If the number of change points is smaller than the predetermined number, check whether the surveillance camera 3 is capturing images from a location other than the location where the fire is occurring.
Alternatively, it determines that the image caused by the disturbance has been stored in the memory 6.6, and sends a control signal to the camera control unit 2 to rotate the surveillance camera 3. When the camera control unit 2 receives the control signal C, it supplies a drive signal C to rotate the surveillance camera 3 by a predetermined angle (angle of view of the camera - horizontal/vertical - minutes).

After the surveillance camera 3 rotates, the flame video signal d is stored in the first memory 5. The data is taken into the second memory 6 and detection of change points is executed as needed. This rotational movement operation is repeated until a point of change, that is, a flame is detected.

Next, as a result of the above judgment, z3 included in 2123 in FIG.
A case where the change point in is larger than a predetermined number of change points, that is, a case where it is determined that there is a flame (fire source) will be explained.

F in FIG. 3 shows the changing point detection state. The change point detection section 7 supplies the difference area (2123 in FIG. 2) to the centering processing section 8.

The centering processing unit 8, which has received the difference area, calculates the position from the X direction/Y direction in FIG. 2d. The calculation method is to find the center point in the X direction located in the bottom direction in the Y direction. Next, the centering processing section 8 controls the center of the flame (.
The movement of the monitoring camera 3 and the fire extinguishing nozzle 10 is controlled so that the position is the center position of the monitoring camera 3 and the fire extinguishing nozzle 10. First, surveillance camera 3
When a control signal e is sent to the fire extinguishing nozzle 1o, a control signal e is sent to the camera monitoring section 2 and the fire extinguishing nozzle control section 9. The range of each control signal is controlled to move within the range A with respect to X shown in FIG. 2d. The camera control section 2 and fire extinguishing nozzle control section 9, each supplied with the control signal, control the movement of the monitoring camera 3 and the fire extinguishing nozzle 10 using the drive signal C and the drive signal f.

This means that the monitoring camera 3 and the fire extinguishing nozzle 10 have been centered in the X direction. 3rd signal state
It is shown in C (X movement signal) in the figure.

Next, centering processing in the Y direction is executed.

When a control signal is sent to the surveillance camera 3 and the fire extinguishing nozzle 10, a control signal e is sent to the camera control section 2 and the fire extinguishing nozzle control section 9. The range of the control signal for each of the combs is controlled so that the base of Y shown in FIG. 2 is at the 10 position of O in FIG. (The reason why the base is treated as the center position in the Y direction is to emphasize the effectiveness of extinguishing the source of the fire.) The respective camera control sections 2 and fire extinguishing nozzle control sections 9 receive the control signals.

The movement of the surveillance camera 3 and fire extinguishing nozzle 1o is controlled by a drive signal C and a rectangular movement signal f. With the above, the monitoring camera 3 and the fire extinguishing nozzle 10 have been able to be centered in the Y direction. The signal state is shown in FIG. 3 (I) (Y movement signal). Further, the state in which the flame has been centered in the X direction/Y direction is shown in e of FIG. When the flame centering process is completed, the control unit 4 causes the extinguishing nozzle control unit 9 to
The extinguishing signal is sent out on the control signal e. The fire extinguishing nozzle control unit 9 receiving the control signal e supplies a fire extinguishing agent (not shown).
A drive signal r is sent to the extinguishing nozzle 10 as an injection signal. The fire extinguishing nozzle 10 injects a fire extinguishing agent toward the flame to extinguish it. The extinguishing signal is shown in (11) in Figure 3.

As is clear from the above explanation, this example product.

This fire extinguishing system can automatically perform everything from activation of the fire detector to extinguishing the fire, allowing it to accurately capture the source of the fire (flame) and perform intensive extinguishing operations. In addition, flame judgment processing is performed, and malfunctions due to external disturbances can be prevented. In this embodiment, a surveillance camera 3 and a fire extinguishing nozzle 1 are used.
0 independently, but it is clear that the monitoring camera 3 and the fire extinguishing nozzle 1° can also be controlled together.

Effects of the Invention According to the present invention, automatic fire monitoring using a fire detector and surveillance camera, accurate flame position and flame range detection through image processing, and reliable movement control of the surveillance camera and fire extinguishing nozzle to the center of the flame can be achieved. Automatic centralized fire extinguishing can be achieved. Additionally, flame determination based on image processing makes it possible to prevent malfunctions caused by external disturbances.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing a fire extinguishing system according to an embodiment of the present invention, FIG. 2 is an explanatory diagram showing the flame detection/movement state, and FIG.
The figure is a timing diagram showing the flow of signals in the present invention. 1...Fire detector, 2...Camera control unit, 3...Surveillance camera, 4...Control unit, 6...No. 1 memory, 6...second memory, 7...change point detection section. 8... Centering processing section, 9... Fire extinguishing nozzle control section, 10... Fire extinguishing nozzle. Name of agent: Patent attorney Toshio Nakao and one other person C,
f-1 drive 1μ No. 2 Figure QI ×z phrase skin in

Claims (1)

[Claims] a fire detector that detects a fire and sends a detection signal to a control unit; a camera control unit that receives a control signal from the control unit and moves a surveillance camera that sends a flame image signal to the control unit; a fire extinguishing nozzle control unit that receives a control signal from a control unit and moves a fire extinguishing nozzle; the control unit includes a first memory that sequentially stores flame video signals from the surveillance camera; a second memory that sequentially stores flame video signals from the surveillance camera; and a second memory that sequentially stores flame video signals from the surveillance camera;
, a changing point detecting section that detects the difference between the flame video signals stored in the second memory, and a centering processing section that detects the center of the difference detected by the changing point detecting section. Fire extinguishing equipment.