JPH0370509B2 - - Google Patents

Description

Detailed Description of the Invention (Industrial Application Field) The present invention detects the size of the fire source of a fire occurring within a monitoring area and the distance to the fire source, and accurately determines the size of the fire source according to the scale of the fire. This invention relates to an automatic fire extinguishing system that performs fire extinguishing operations.

(Prior Art) The inventor of the present application has developed a conventional automatic fire extinguishing system that uses a fire detector to detect the occurrence of a fire, and also detects the distance to the fire source, and emits extinguishing agent, etc. based on the detection result. The radial direction of the radiation nozzle and the aperture amount (aperture) of the radiation port are automatically adjusted (Jitsugan-sho (No. 58-185062)).

The principle of detecting the position of a fire source using the automatic fire extinguishing system will be explained with reference to FIG. The fire source is configured to be detected by scanning the area in the horizontal and vertical directions.

Assuming that each detection sensor S1, S2 detects a fire source F by scanning operation, the angle of each detection sensor S1, S2 with respect to the fire source at that time, that is, the horizontal direction (with respect to the monitoring area) of each detection sensor S1, S2 is Find the angles θ1 and θ2 formed by the direction of the fire source F with respect to d1 and d2 (right angle direction), and use the following equations (1) and 1
a, calculate the distance X from the sensors S1 and S2 to the fire source F.

Xa=L/(tanθ1+tanθ2) ……(1) X=Xa・cosθ ₀ =L・cosθ ₀ /(tanθ1
+tanθ2)...(1a) In addition, the distance X calculated by the above formula (1a) and the opening amount of the radiation nozzle for setting the injection force are set in a predetermined correspondence relationship, and the distance The opening amount of the radiation nozzle is adjusted. For example, if the fire source is far away, the radiation nozzle is narrowed down to lengthen the reach of the extinguishing agent, and if the fire source is close, the opening is widened to expand the radiation range of the fire extinguishing agent.

(Problem to be solved by the invention) However, in such an automatic fire extinguishing system, the opening amount of the radiation nozzle is adjusted according to the distance to the location of the fire regardless of the size of the fire source. Therefore, for example, if the fire source is large but occurs far away, the extinguishing agent will be applied with the injection nozzle constricted, making it possible to extinguish the fire only in a narrow area. As a result, a sufficient extinguishing effect cannot be obtained, and conversely, since the fire source is small but close, the opening of the radiation nozzle is expanded to expand the radiation range, which causes the extinguishing agent to be spread over an unnecessarily wide area. There was a problem with the dispersal of etc.

(Means for Solving the Problems) The present invention was made in view of the above problems, and an object of the present invention is to provide an automatic fire extinguishing system that can perform accurate fire extinguishing work according to the state of the fire. In order to achieve this purpose, the size of the fire source of a fire occurring within the monitoring area and the distance to the fire source are detected, and the opening amount of the radiation nozzle is adjusted based on the detection results. It is characterized by the following.

(Example) Hereinafter, an example of an automatic fire extinguishing system according to the present invention will be described with reference to the drawings.

FIG. 1 is a perspective view showing an automatic fire extinguishing system. A pair of fire source detection devices 3 are provided at a predetermined interval on a pedestal 2 provided in the device body 1, and each fire source detection The device 3 is provided with a fire detection detector 3a toward the monitoring area.

The fire source detection device 3 is provided so that it can be oscillated so that it can be oriented horizontally and vertically at appropriate angles with respect to the monitoring area, and the drive motor, power transmission mechanism, etc. The detector 3a is driven by the provided driving means 3b.
is designed to scan in the XY axis directions within the monitoring area to detect fires.

A radiation nozzle 4a is located between the pair of fire source detection devices 3.
A fire extinguishing device 4 equipped with a radiation nozzle 4a is provided.
The radial direction is changed vertically and horizontally by the drive motor and power transmission mechanism of the radial direction control means 4b, and the opening amount is controlled by the opening amount control mechanism 4c.

Reference numeral 5 denotes a driving means for driving the pedestal 2 left and right.

A fire detector 6, an alarm lamp 7, and an alarm buzzer 8 are provided at the top of the device body 1.

A control mechanism 9 is provided within the device main body 1, and processes detection signals from the detector 3a and the fire sensor 6, as well as controls the drive of the fire source detection device 3 and the fire extinguishing device 4.

Further, in the lower part of the device main body 1, there is a storage tank 10 for storing fire extinguishing agent, fire extinguishing liquid, etc., and a storage tank 1.
A pump 12 for supplying extinguishing agent etc. from 0 to the radiation nozzle 4a side via piping 11, the pump 12 and a drive motor 13, etc. are provided, and the drive of the pump 12 and the drive motor 13 is controlled by a control mechanism 9. .

FIG. 2 is a block diagram showing the configuration of the automatic fire extinguishing system shown in FIG. 1, and the control mechanism 9 shown in FIG.
is equipped with an input interface 14, an output interface 15, a main control section 16, and an alarm control section 17.

The control mechanism 9 operates under programming control by a microcomputer, and inputs detection signals from the fire detector 6 and the pair of detectors 3a to the main control section 16 via the input interface circuit 14.

The main control unit 16 connects the drive means 3b, 5, the radial direction control means 4b,
Predetermined control signals are supplied to the opening amount control mechanism 4c and the drive motor 13, respectively, to control the operations of the pedestal 2, the fire source detection device 3, the fire extinguishing device 4, the fire pump 12, and the drive motor 13.

Further, when the alarm control section 17 identifies a fire, it supplies an alarm signal to the alarm buzzer 8 and the alarm lamp 7,
Causes alarm action to take place.

FIG. 3 is a flowchart showing the control operation of the control mechanism 9, and the operation of the automatic fire extinguishing system of the present invention will be explained with reference to FIG.

First, after the operation starts, in an initial state setting routine 100, an initial state for normal times when there is no fire is set. For example, the drive control means 5 drives the pedestal 2, and the drive means 3d drives the fire source detection device 3 to direct the fire source detection device 3 to the front.

Next, in a routine 110, the main control unit 16 inputs the detection signal generated by the fire detector 6 via the input interface 14, and repeats the routine until a detection signal indicating a fire is input.

Here, when the fire detector 6 detects a fire, the routine moves to a routine 120, and the main control section 16 connects the pair of drive control means 3 via the output interface 15.
command b to start scanning operation by the fire source detection devices 3, 3.

FIG. 4 is an explanatory diagram showing how the detectors 3a, 3a instantaneously scan a predetermined monitoring area by the scanning operation of the fire source detection devices 3, 3. First, the fire source detection devices 3, 3 After pointing to the lower left of the monitoring area, move it horizontally, and when it reaches the maximum horizontal position, move it up by a predetermined interval, then move it in the opposite horizontal direction, and this reciprocating movement is Repeat until you reach the top position.

During this scanning operation, the main control unit 16 reads the temperature data detected by the fire source detectors 3a, 3a each time the fire source detectors 3, 3 deviate at a predetermined angle, and detects the temperature distribution in the inspection area. The data is stored in a predetermined storage area as data corresponding to the deflection angles of the sensors 3a, 3a. When scanning of all monitoring areas is completed, this is determined in routine 130, and routine 14 is executed.
Transition to 0.

Routine 140 determines the size of the fire source based on the detected data. In FIG. 4, when the detectors 3a, 3a scan the fire source range, detection data indicating high temperature is obtained, and a rapid temperature change is detected at the outer edge of the fire source. Based on this feature, the main control unit 16 determines the deviation angle θw during which the detectors 3a scan the fire source range, and sets this θw as the relative width of the fire source. Then, the maximum actual threat θw obtained by scanning the pre-monitoring area is memorized as the maximum width of the fire source.

This principle is shown in Figure 5a. FIG. 5b shows the principle of obtaining the height of the fire source, and the detectors 3a, 3a
scans the monitoring area sequentially from bottom to top and detects the outer edge of the fire source where the temperature changes rapidly, distinguishing the top Up and bottom Lw of the fire source, and detecting the fire source from the horizontal direction. The deviation angle θ ₀ to the bottom of
and the detectors 3a, 3 while scanning the fire source range.
The deflection angle θh when a shifts up and down is determined and stored.

Furthermore, as shown in FIG. 6, a pair of detectors 3
The respective angles θ1 and θ2 when a and 3a face the fire source
Find and memorize.

Next, in routine 150, the distance Xa to the fire source is calculated based on equation (1a). That is,
Since the detectors 3a, 3a are installed at a predetermined distance interval L, by substituting the angles θ1, θ2 indicating the direction of the fire source and the deviation angle _θ0 determined in routine 140 into the above equation (1a), calculate.

Next, in routine 160, the distance X to the fire source obtained in routine 150, the deviation angle θw obtained in routine 140, and the deviation sensitivity θh indicating the height of the fire source are determined.
The actual width W of the fire source is calculated by substituting into the following equation (2), and the actual height of the fire source is calculated using the following equation (3).

_W = ₂ . If it is determined that it is larger than the threshold value, the process moves to routine 170, and if it is smaller, it is determined that there is no real fire, and the process moves to the initial setting routine 100.

In routines 180 to 210, a fire extinguishing operation is performed. First, in routine 180, the alarm control section 17 sets the alarm lamp 7 and the alarm buzzer 8.
At the same time, the main control unit 16 outputs a control signal to the radiation direction control means 4b via the output interface 15 to direct the radiation nozzle 4a toward the fire source.

Next, in routine 190, a control signal is output to the opening amount control means 4c to adjust the opening amount of the radiation nozzle 4a. The opening amount at this time is set based on the distance X to the fire source, the width W, and the height H. That is, if the distance The amount of supply is also adjusted.

In this way, the fire extinguishing device 4 is set, and the routine 190
The pump 12 and the drive motor are operated to carry out fire extinguishing activities using the radiation nozzle 4a.

In routine 200, it is determined whether or not the fire has been extinguished by inputting the detection signal detected by the fire detector 6 during this extinguishing operation.If it is determined that the fire has not been extinguished, in routine 210, the radiation nozzle 4a is activated. Fine-tune the radiation direction and repeat firefighting operations.

When it is determined that the fire is extinguished in routine 200, the process moves to routine 220, where the pump 12 and drive motor 1 are
3 and at the same time, the alarm lamp 7 and alarm buzzer 8 are also stopped.

Then, the process returns to routine 100 for initialization and fire monitoring is performed.

In this embodiment, the angles θw, θh, etc. corresponding to the width, height, etc. of the fire source are determined after the detection data detected by the detectors 3a, 3a is stored in the storage area. It is also possible to simultaneously obtain the information in the above information, thereby reducing the storage area.

Further, in this embodiment, the size of the fire source is determined by the width and height, but the size of the fire source may be determined by only the width or only the height.

Furthermore, in this embodiment, the pair of fire source detection devices 3, 3 are scanned in the same way, but the range of the monitoring area is divided into two, and each of the fire source detection devices 3 is scanned for each divided range. You can do it like this.

(Effects of the Invention) As explained above, according to the automatic fire extinguishing system of the present invention, the opening amount of the radiation nozzle is adjusted based on the distance to the fire source and the size of the fire source. It is possible to carry out appropriate firefighting activities according to the scale of the fire.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing an embodiment of an automatic fire extinguishing system according to the present invention, Fig. 2 is a block diagram showing the configuration of Fig. 1, and Fig. 3 shows the operation of the embodiment of Figs. 1 and 2. Figure 4 is an explanatory diagram showing the scanning operation of the detector, Figure 5 is an explanatory diagram showing the principle for calculating the size of the fire source, and Figure 6 is an explanatory diagram showing the principle for calculating the size of the fire source. FIG. 1: device main body, 2: pedestal, 3: fire source detection device,
3a: Detector, 3b, 5: Drive means, 4: Fire extinguisher, 4a: Radiation nozzle, 4b: Radiation direction control means, 4c: Opening amount control means, 6: Fire detector,
9: Control mechanism, 12: Pump, 13: Drive motor, 14: Input interface, 15: Output interface, 16: Main control section.

Claims (1)

[Claims] 1. In an automatic fire extinguishing system that uses a radiation nozzle to extinguish the fire source when a fire is detected, the distance to the fire source and the size of the fire source are detected, and the opening amount of the radiation nozzle is adjusted based on the detection results. An automatic fire extinguishing system characterized by having a control means for controlling the fire extinguishing system.