JPH0445195B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to an automatic fire extinguishing system that extinguishes a fire by driving a nozzle based on a control command based on detection information from a flame detection device that detects the occurrence of a fire in a monitored area. , relates to a flame core detection method for detecting the flame core of a flame.

[Conventional technology]

When the fire detector detects a fire, the inventors activate a flame detection device that detects the flame by detecting infrared rays emitted from the flames caused by the fire, searches for the flame position, and directs the nozzle to detect the flame. An automatic fire extinguishing system has been proposed that automatically extinguishes a fire by directing fire extinguishing agent or extinguishing liquid to a certain location (Japanese Patent Application No. 1982-249141).

In such an automatic fire extinguishing system, each of the pair of flame detection devices includes a detector for detecting flame, a vertical control means for vertically controlling the detector, and a horizontal control means for controlling the detector horizontally. It is equipped with When a fire detector detects a fire, it first activates both vertical control means to direct one detector directly below and the other toward the center of the floor of the monitored area, and then horizontally. The control means was operated to scan each detector horizontally to search for flames.

If no flame is detected by the above operations, then operate both vertical control means to deflect each detector upward by a predetermined angle, and then operate the horizontal control means to move each detector horizontally. The flame was detected by scanning the flames and then repeating the same series of operations.

In other words, when the fire detector detects that a fire has broken out within the monitored area, the monitored area is divided into two areas, upper and lower, and each of the pair of flame detection devices separates each divided monitoring area. When one of the flame detectors detects flames, it directs the other flame detector in the direction of the flame and collects the detection information from both flame detectors. The position of the flame was calculated based on the calculation result, and the nozzle was controlled according to the calculation result.

In addition, regarding the method of accurately detecting the flame center in the horizontal direction when determining the position of the flame, please refer to the patent application filed in 1983.
It is already well known in No. 111316.

According to the technique disclosed in Japanese Patent Application No. 57-111316, a detector is provided in which a pyroelectric element for detecting infrared rays is provided in the center of a parabolic concave mirror having a certain directivity angle θ.
Fire flames are detected by scanning horizontally over the monitored area.

More specifically, each time the detector is tilted at a predetermined angle in the longitudinal direction (vertical direction) of the monitoring area,
Horizontal scanning is achieved by swinging at a wide angle in the horizontal scanning direction and repeating this drive control.

When the fire flames enter the range of the concave mirror's directivity angle θ, the infrared pyroelectric element detects the flames and determines that a fire has occurred.

Furthermore, when a flame is detected by the horizontal scan, another horizontal scan is performed in the vertical direction with the detector fixed at the vertical angle at the time of detection. Then, during horizontal scanning, the direction angle α1 of the central axis of the concave mirror is detected at the time when the tip of the concave mirror starts to touch the flame (i.e., when the pyroelectric element starts to detect infrared rays). Furthermore, when the rear end portion of the concave mirror is removed from the flame position (i.e.,
The directional angle α2 of the central axis of the concave mirror at the point when the pyroelectric element no longer detects infrared rays is detected, and the flame center is located in the direction drawn by the average value of these directional angles (α1+α2)/2. Determine that it exists.

Fire extinguishing efficiency is improved by discharging extinguishing agent or the like toward the flame center position.

[Problem that the invention seeks to solve]

However, although the conventional technology is effective in detecting the flame center position by horizontal scanning, the identification of the flame center position in the vertical direction is still insufficient, so it is an unresolved problem to further improve fire extinguishing efficiency. was left behind.

That is, as shown in FIG. 4B, if a fire occurs approximately in the center of the floor of the monitoring area, the detector 3a
is located approximately in the center of the floor of the monitoring area, and the detector 4
a is initially set directly downward, and since there is a heat source part F2 above the flame that radiates heat due to combustion of gas, the detector 3a is detected in the first vertical scan.
receives the heat rays from the heat source part F2, and determines that it is a flame if the radiant energy from the heat source part F2, that is, the intensity of the infrared rays, exceeds a predetermined level, and treats the heat source part F2 as if it were a flame, and turns the nozzle into a heat source. The fire extinguishing agent was directed towards section F2. Therefore, the extinguishing agent is radiated onto the upper part of the flame, resulting in a significant decrease in extinguishing efficiency, leaving room for improvement.

[Means for solving problems]

The present invention was made in view of the above problems, and
In order to provide a flame center detection method for an automatic fire extinguishing system that accurately detects the vertical flame center of a flame, the present invention includes a flame detector, a vertical direction control means for vertically scanning the detector, and a flame center detecting method for detecting the flame center in the vertical direction. A first flame detection device and a second flame detection device each having a horizontal direction control means for horizontally scanning the flame detection device are installed at a predetermined interval,
control to initially set the vertical direction angle of the second flame detection device to a direction substantially directly below and the vertical direction angle of the second flame detection device to a predetermined angle upward from the first flame detection device, and to command the start of driving. Each vertical direction control means and each horizontal direction control means are driven based on a control command from the section, and the vertical directivity angle of the corresponding flame detection device is set upward by a predetermined angle from the initial setting. In addition, in an automatic fire extinguishing system that horizontally scans each flame detection device at each set angle, detects the flame center position, and extinguishes the flame, the control unit is provided with a flame core determination unit that determines the flame core position of the flame, In the initial scan in which the vertical directivity angle is initially set, when a detection signal from the second flame detection device is identified, a control signal is output, and the corresponding vertical direction control means and horizontal direction control means are driven to detect the second flame detection device. The vertical directivity angle of the second flame detector is set downward by a predetermined angle, and the position of the deflection angle just before the detection signal from the second flame detector stops is set in the vertical direction of the flame. It is designed to distinguish it from the flame center position.

〔Example〕

Embodiments of the present invention will be described below based on the drawings.

FIG. 1 is an overall configuration diagram showing an embodiment of the present invention.

First, to explain the configuration, 1 is an automatic fire extinguishing system, a pair of flame detection devices 3 and 4 are arranged on a pedestal 2 at a predetermined interval, and the flame detection device 3 detects infrared rays emitted from flames. A detector 3a for detecting,
It includes vertical control means 3b that controls the detector 3a in the vertical direction, and horizontal control means 3c that controls the exciter 3a in the horizontal direction. Similarly, the flame detection device 4 includes a detector 4a that detects infrared rays emitted from a flame, a vertical control means 4b that controls the detector 4a in the vertical direction, and a horizontal control unit that controls the detector 4a in the horizontal direction. It is equipped with means 4c.

The flame detection devices 3 and 4 each have a structure in which detectors 3a and 4a are provided at the center of a parabolic concave mirror. Each of the vertical direction control means 3b, 4b and the horizontal direction control means 3c, 4c independently controls the corresponding detector 3a, 4a, and each detector 3a, 4a is vertically controlled by a command from a control section, which will be explained later. Detect the position of the flame by scanning in the direction and horizontal direction. 5
is a nozzle device installed at the center of rotation of the frame 2, which includes a nozzle 5a that emits extinguishing agent, a radiation direction control means 5b that directs the nozzle 5a to the position of the flame detected by the flame detection devices 3 and 4, and A radiation state control means 5c is provided for controlling the radiation state by adjusting the opening degree of the injection port of the nozzle 5a according to the distance to the nozzle 5a. Reference numeral 6 denotes a direction control means, which controls the rotation of the pedestal 2 in the horizontal direction to direct the flame detection devices 3, 4 and the nozzle device 5 together toward the position of the flame. 7
is a buzzer, 8 is a lamp, and 9 is a fire detector for overall monitoring.The fire detector 9 has two built-in detection elements, and the monitoring area is divided into two areas.
No. 1 and Area No. 2 will be monitored exclusively. When any of the detection elements built into the fire detector 9 detects a fire, it sends detection information to the circuit section 10.
0 drives the buzzer 7 and lamp 8 to display an alarm, and further operates the direction control means 6 to unite the flame detection devices 3, 4 and nozzle device 5 to locate the fire area (for example, area No. 2) Direct it toward the center.

Further, the circuit section 10 has a built-in control section in which programs such as various control programs and arithmetic programs are set using a microcomputer.
Vertical direction control means 3b, 4b and horizontal direction control means 3c, based on a preset control program.
4c to further divide the fire outbreak area,
Each flame detection device 3, 4 is caused to search for flame.

Further, the control unit includes a flame core determination unit, and the vertical direction control means 3b, 4b and the horizontal direction control means 3c, 4c are driven again based on the detection information from the flame detection device 3 or 4 that detected the flame. to determine the location of the flame's core. 11 is a tank for storing a fire extinguishing agent or liquid; 12 is a pump that sends the fire extinguishing agent or liquid from the tank 11 to the nozzle 5a;
Reference numeral 3 denotes a motor, and the motor 13 is activated by a command from the control section of the circuit section 10, and operates the fire extinguishing pump 12 to supply extinguishing agent or extinguishing liquid to the nozzle 5a.

FIG. 2 is a block diagram showing the circuit configuration of the automatic fire extinguishing system shown in FIG. 1. Detection information from the fire detector 9 and the detectors 3a and 4a is input to the control unit 17 via the input interface 15. The control unit 17 incorporates a microcomputer and is set with various programs such as control programs and arithmetic programs, and when detection information from the fire detector 9 is input, it decodes the detection information and outputs a control signal. 16 to the direction control means 6, the vertical direction control means 3b, 4b, and the horizontal direction control means 3c, 4c, and further divides the fire occurrence area into each flame detection device 3, 4 to command flame detection. do. Further, when the flame core determination section provided in the control section 17 receives detection information from the flame detection device 3 or the flame detection device 4 that detected the flame, it outputs a control signal again, When the flame core determination unit provided in the control unit 17 that drives the direction control means 3c, 4c to instruct detection of the position of the lower part of the flame, that is, the flame core, determines the position of the flame core, a control signal is sent to the interface 16. via the radiation direction control means 5b, the radiation state control means 5c and the motor 13.
and order firefighting operations. Here, the vertical direction control means 3b, 4b correspond to the corresponding detectors 3a, 4a.
Vertical direction control is performed independently. Further, the horizontal direction control means 3c, 4c are connected to the corresponding detectors 3a,
4a is independently controlled in the horizontal direction. The direction control means 6 controls the rotation of the pedestal 2 so that the nozzle device 5 and the flame detection devices 3 and 4 are integrally opposed to the position of the flame. The radial direction control means 5b vertically controls the injection port of the nozzle 5a to direct the nozzle 5a toward the flame center. Radiation state control means 5c
controls the radiation state by adjusting the opening degree of the injection port of the nozzle 5a. The motor 13 drives the fire extinguishing pump 12 to deliver extinguishing agent to the nozzle 5a. Alarm part 1
8 sounds a buzzer 7 and lights a lamp 8 based on a command from the control unit 17 to warn of the occurrence of a fire.

3a and 3b are flowcharts of the control section 17,
FIG. 4a is a plan view showing the operation of one embodiment of the present invention, and FIG. 4b is a side view thereof.

The operation of the present invention will be explained with reference to FIGS. 3a and 3b and 4a and 4b.

In FIG. 3a, block 21 sets the initial state in normal times. For example, while controlling the horizontal direction control means 3c, 4c, the direction control means 3a, 4a and the nozzle 5a are directed in the front direction. Further, the directivity angle of the detector 3a is directed toward the approximate center of the floor surface of the monitoring area, and the vertical deflection angle of the detector 4a is directed directly below. Block 2
In 2, the area is monitored by fire detector 9 for the occurrence of fire.
For example, if a fire breaks out in area No. 2 as shown in Figure 4a,
Of the two detection elements provided in the fire detector 9, the element monitoring area No. 2 performs a detection operation and proceeds from block 22 to block 23, where it drives the direction control means 6. The frame 2 is rotated in the horizontal direction by the control operation of the direction control means 6, and the detectors 3a, 4a and nozzle 5a are commanded together toward the approximate center of area No. 2, causing the detectors 3a, 4a to detect the flame F. Command the movement. That is, the vertical deviation angle of the detector 3a is set to the center of the front of area No. 2, and in block 24, the horizontal direction control means 3c, 4c are driven to adjust the vertical deviation angle of each detector 3a, 4a. Area No. 2 is sequentially scanned in the horizontal direction while keeping the deviation angle at the initial value. Here, there is a heat source part F2 above the flame F that radiates heat due to combustion of gas, and in the first horizontal scan, the detector 3a receives the heat rays from the heat source part F2, and the block 25 receives the heat rays from the heat source part F2. If the intensity of radiant energy, ie, infrared rays, from the heat source part F2 is equal to or higher than a predetermined level, it is determined that there is a flame, and the process proceeds to block 39.
In block 39, it is determined whether it is the first line, that is, the first horizontal scan, and since the flame detection is due to the first horizontal scan, the process proceeds from block 39. In Figure 3b,
From there, the process proceeds to block 41, where the vertical direction control means 3b
is deflected by a predetermined angle in the opposite direction, that is, in the direction of the automatic fire extinguishing device 1 (towards the front), and the vertical direction control means 4b is deflected by a predetermined angle in the forward direction, that is, in the direction of the flame F. Further, the program proceeds to block 42, where the vertical direction control means 3c, 4c are driven to scan in the horizontal direction to search for flames. In block 43, the detector 3a detects the flame F again.
It is determined whether or not the detector 3a is detected.
If the detector detects radiant energy from the heat source F2 again, the process proceeds to block 44, where it is determined whether the detector 4a has detected flame. In the detector 4a, if no flame is detected, the process returns to block 41, and the deflection angle of the vertical direction control means 3b is further reversed, and the deflection angle of the vertical direction control means 4b is further changed in the forward direction. deflection, block 42
The flame F is searched for by driving the horizontal control means 3c and 4c. The series of operations is repeated in the same manner. That is, before the signal output from the detector 3a can no longer be obtained, it is determined whether or not the detector 4a has detected the flame first, and in block 44, it is determined whether the flame has been detected first.
If a detects the flame first, the process proceeds from block 44 to block 45. In block 45, the vertical deviation angle of the detector 4a is detected from the forward direction, that is, from the lower side of the flame, and since the detection position by the detector 4a is the flame center position, the detector 4a detects the flame. When detected, the detector 3a is controlled in the direction of the flame center. Further, if the signal output from the detector 3a is no longer obtained before the detector 4a detects flame in block 43, the process proceeds from block 43 to block 46, in which only the vertical direction control means 3b is controlled one line in the forward direction. , that is, the vertical deviation angle is restored by one step. Furthermore, the process proceeds to block 47, where the detector 4a is controlled to be on the same line as the detector 3a. In block 48, the horizontal control means 3c and 4c are driven to horizontally scan the detectors 3a and 4a to search for the position of the flame center. In block 49, the position when the signal output from the detector 3a is obtained again is determined to be the flame center position in the vertical direction of the flame, and both detectors 3a and 4a are located at the flame center position in the vertical direction of the flame. When it is determined that the position has been detected,
Proceed from block 49 to block 50.

In block 50, processing is performed to identify the position of the flame center in the horizontal direction. That is, this process is performed in the same manner as the technique disclosed in Japanese Patent Application No. 111316/1982.

First, since the position of the flame has been detected by vertical scanning in blocks 21 to 49, the detection device 3 or 4 is fixed at the vertical angle at which it was detected. That is, if the vertical angle (inhibition angle) is within the monitoring range of the detection device 3, the detection device 3 is drive-controlled, and if the angle (inhibition angle) is within the simple range of the detection device 4, the detection device 4 is drive-controlled.

After the detection device 3 (or 4) is directed toward the reference direction for starting horizontal scanning, it is rotated horizontally at a wide angle.

By this horizontal scanning, the point at which the tip of the concave mirror of the detection device 3 (or 4) begins to touch the flame position (i.e., the point at which the detector 3a or 4a begins to detect infrared rays) is detected. Detect the direction angle α1 of the central axis of the concave mirror at the point in time), and further detect the point in time when the rear end of the concave mirror moves away from the position of the flame (i.e., the point in time when the detector 3a or 4a no longer detects infrared rays) ) is detected, and the average value of these direction angles (α1
It is determined that the flame center exists in the direction obtained by +α2)/2.

Once the flame center positions in the vertical and horizontal directions are detected in this manner, the process proceeds to the next step.

Referring again to FIG. 3a, the program proceeds to block 29, where the buzzer 7 is sounded and the lamp 8 is turned on to display an alarm. Further, the process proceeds to block 30, where the direction control means 6 is driven to move the mount 2.
By controlling the rotation, the flame detection devices 3 and 4 and the nozzle device 5 are made to face the flame center F ₀ of the flame F. In the block 31, as the pedestal 2 rotates, the detectors 3a,
Readjustment is performed by deviating the pointing direction of the flame 4a from the flame F, and the horizontal direction control means 3c and 4c are operated to make the detectors 3a and 4a face the flame center Fo of the flame. In block 32, the detectors 3a and 4a collect detection information while facing the flame center Fo of the flame F, and based on the detection information, determine the exact position of the flame, that is, the distance to the flame center Fo. and calculate the combination of flame F. The nozzle device 5 is controlled based on the result of this calculation, and in block 33, the radial direction control means 5b is operated to control the vertical direction of the nozzle 5a and direct the injection port in the direction of the flame center Fo of the flame F. At the same time, in block 34, the radiation state control means 5c is operated to adjust the opening degree of the injection port of the nozzle 5a and control the radiation state in which the extinguishing agent is injected.
In block 35, the fire pump 12 is operated by starting the motor 13, and fire extinguishing water is emitted from the nozzle 5a.
Start firefighting operations. Block 36 monitors whether the fire is extinguished or not. If the fire is not completely extinguished, the process returns from block 36 to block 32, calculates the flame center position from detectors 3a and 4a again, and calculates the flame center position based on the calculation result. Then readjust the radial direction and radial state of the nozzle 5a to continue firefighting.
When it is confirmed in block 36 that the fire has been completely extinguished, the process proceeds to block 37, where the motor 13 and fire pump 12 are turned off to stop fire extinguishing activities. In block 38, the buzzer 7 and lamp 8 are turned off to stop the alarm.

In the above operation explanation, the case where the flame F is located approximately at the center of the floor surface of the monitored area is explained as an example, but when the flame F is located at another position, for example, on the side of the automatic fire extinguishing device 1, At block 26 the detector 4a first detects the flame and the process proceeds to block 28.
In block 28, the vertical deviation angle of the detector 4a is sequentially shifted in the forward direction from directly below, so that scanning is performed from the flame center of the flame, and the detector 4a
When a flame is detected by sequentially shifting the vertical deviation angle in the forward direction, the process automatically proceeds to block 29 since this is the flame center position, and the same operation is performed thereafter. .

〔Effect of the invention〕

As described above, according to the present invention, a detector for detecting a flame, a vertical control means for scanning the detector in the vertical direction, and a horizontal control means for scanning the detector in the horizontal direction are provided. installing first and second flame detection devices equipped with a predetermined interval;
The vertical direction angle of the first flame detection device is initially set to be substantially directly downward, and the vertical direction angle of the second flame detection device is initially set to a predetermined angle upward from the first flame detection device, and the drive is started. Each vertical direction control means and each horizontal direction control means are driven based on the control command from the control unit, and the vertical directivity angle of the corresponding flame detection device is shifted upward by a predetermined angle from the initial setting. In an automatic fire extinguishing system that scans each flame detection device in the horizontal direction at each set angle, detects the flame center position, and extinguishes the flame, the control unit has a flame center determination unit that determines the position of the flame core. is provided, and when a detection signal from the second flame detection device is identified during an initial scan in which the vertical directivity angle is initially set, a control signal is outputted to drive the corresponding vertical direction control means and horizontal direction control means. Then, the vertical directivity angle of the second flame detection device is sequentially shifted downward by a predetermined angle, and the position of the deflection angle immediately before a detection signal is no longer obtained from the second flame detection device is set as the flame detector. By determining the position of the flame center in the vertical direction, it is possible to accurately detect the position of the flame center.

In addition, by accurately detecting the position of the flame center, the nozzle can be directed toward the flame center to extinguish the fire efficiently and reliably, greatly improving the reliability of automatic fire extinguishing systems. This effect can be obtained.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing the state of use of the present invention, FIG. 2 is a block diagram showing the circuit configuration of FIG. 1, FIG. 3 A and B are flow diagrams, and FIG. 4 A is a diagram of the circuit configuration of FIG. A plan view showing the operation, FIG. 4B is a side view of FIG. 4A. 1... Automatic fire extinguishing system, 2... Frame, 3, 4...
Flame detection device, 3a, 4a...detector, 3b, 4b
... Vertical direction control means, 3c, 4c ... Horizontal direction control means, 5 ... Nozzle device, 6 ... Direction control means, 7 ... Buzzer, 8 ... Lamp, 9 ... Fire detector, 10 ... Circuit section, 11...tank, 12...
...Fire pump, 13...Motor, 15...Input interface, 16...Output interface, 1
7...Control unit, 18...Alarm unit, Fo...Flame heart,
F...Flame, F2...Heat source.

Claims (1)

[Claims] 1. A detector comprising a flame detector, vertical control means for vertically scanning the detector, and horizontal control means for horizontally scanning the detector. A first and a second flame detection device are installed at a predetermined interval, and the vertical direction angle of the first flame detection device is set to be substantially directly downward, and the vertical direction angle of the second flame detection device is set to the second direction. The first flame detection device is initially set upward at a predetermined angle, and each vertical direction control means and each horizontal direction control means are driven based on a control command from a control unit that instructs to start driving, and the corresponding flame is detected. An automatic fire extinguishing system that sets the device's vertical directivity angle upward by a predetermined angle from the initial setting, scans each flame detection device horizontally at each set angle, detects the flame center position, and extinguishes the flame. The control unit is provided with a flame center determination unit that determines the flame center position of the flame, and when the detection signal from the second flame detection device is identified in the initial scan in which the vertical directivity angle is initially set, the control unit performs control. output a signal, drive the corresponding vertical direction control means and horizontal direction control means to sequentially set the vertical directivity angle of the second flame detection device downward by a predetermined angle; 1. A flame center detection method for an automatic fire extinguishing system, characterized in that the position of the deviation angle immediately before a detection signal from a detection device can no longer be obtained is determined as the vertical flame center position of the flame.