JPS6249496A - Flame detector - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a flame detection device that efficiently searches for a fire occurring within a monitoring area.

(Prior Art) As a conventional flame detection device, the inventors of the present application have proposed that when a fire detector for overall monitoring detects the occurrence of a fire, a pair of fire source detection devices further detects the location of the fire source. It has been proposed to be applied to an automatic fire extinguishing system that directs the nozzle to the fire source position in accordance with the calculation result based on the detection information from the source detection device and releases extinguishing liquid to extinguish the fire (Japanese Patent Application No. 58-249141). ).

゛In this automatic fire extinguishing system, each of the pair of fire source detection devices includes a detector for detecting a fire source, a vertical control means for scanning the detector in a vertical direction, and a horizontal control means for scanning the detector in a horizontal direction. The vertical deflection angle of each detector is initially set to approximately directly downward, and when the fire detector detects a fire, the horizontal direction control means of each fire source detection device is driven. The fire source was then searched for by scanning the corresponding detector horizontally.

If the fire source is not detected by the above operations, the vertical direction control means of each fire source detection device is further driven to set the vertical deviation angle of the corresponding detector upward by a predetermined angle from directly below. , After completing the setting of the deflection angle, drive each horizontal direction control means, scan the corresponding detector in the horizontal direction to search for the fire source, and repeat the search operation in the same manner to detect the position of the fire source. I'm here.

That is, the vertical directivity angles of the pair of detectors are set upward by equal angles set in advance, and the pair of detectors is scanned in the horizontal direction for each set deviation angle in one rotation. When the vertical pointing angle reached the fire source position, the fire source was detected by horizontal scanning.

(Problem to be Solved by the Invention) However, the vertical deviation angle of the detector is set in advance by equal angles throughout the entire monitoring area from the near side to the far side of the fire source detection device. In this case, there were the following problems.

In other words, the standard is set to the flame located on the 1,000-sided side of the fire source detection device installed in the monitoring area, the smallest flame size that can be judged as a fire is assumed to be the reference fire source, and this reference fire source is detected. Once the vertical deflection angle is set so that the detector can be deflected in the vertical direction, the vertical deflection angle of the detector is sequentially set to deflect upward, and the detector is directed toward the far side of the monitoring area and positioned at a far distance. When scanning a floor surface with a unit deviation angle of had to be subdivided to detect the flame.

Conversely, if you align the standard with a reference fire source located far away from the monitoring area and set the deflection angle so that it can detect the distant reference fire source, the vertical pointing angle of the detector will move towards the front of the monitoring area. In the case of directing, the scanning width of the floor surface scanned by the unit deflection chest hit became narrower than necessary, and the number of scans increased, making it impossible to efficiently detect the fire source.

(Means for Solving the Problems) The present invention has been made in view of the above problems, and includes a detector for detecting a fire source generated within a monitoring area, and a vertical direction for scanning the detector in the vertical direction. In a flame detection device equipped with a control means and a horizontal control means for horizontally scanning the detector, the flame detection device is arranged so that the fire source can be detected efficiently over the entire area within the monitoring area. Assuming multiple minimum reference fire sources that can be identified as flames in advance on the floor and wall surfaces of the interior, vertical deviations are placed on the beam line connecting the upper end of one of the reference fire sources and the lower end of the other of the adjacent reference fire sources. A deflection angle setting section for setting the angle is provided, and a vertical direction control means is provided based on a command from the deflection angle setting section.

(Example) Hereinafter, one embodiment of the present invention will be described based on the drawings.

FIG. 1 is an explanatory diagram showing the state of use of the present invention, and FIG. 2 is a block diagram showing the circuit configuration of FIG. 1.

First, to explain the configuration, 1 is an automatic fire extinguishing system, a pair of fire source detection devices 3 and 4 are arranged on a pedestal 2 at a predetermined interval, and the fire source detection device 3 detects a fire source. A detector 3ai (for example, a pyroelectric element, etc.), vertical control means 3b for vertically controlling the detector 3a, and horizontal control means 3C for controlling the detector 3a horizontally. The fire source detection device 4 also includes a detector 4a that detects a fire source, and a vertical control means 4b that vertically controls the detector 4a.
(for example, a pyroelectric element, etc.) and horizontal direction control means 4C that controls the detector 4a in the horizontal direction. Each of the vertical control means 3b, 4b and the horizontal control means 3c, 4c independently controls the corresponding detector 3a, 4a,
The position of the fire source is detected by scanning each of the detectors 3a and 4a in the vertical and horizontal directions in response to a command from a control section, which will be described later. Reference numeral 5 denotes a nozzle device installed at the center of rotation of the pedestal 2, which includes a nozzle 5a that emits extinguishing liquid, a fire source detection device 3,
A radiation direction control means 5b that directs the nozzle 5a to the fire source position detected in step 4, and a radiation direction control means 5b that directs the nozzle 5a to the fire source position detected in step 4;
A radiation state control means 5C is provided for controlling the radiation state by adjusting the distance between the injection ports of a. Reference numeral 6 denotes a direction control means, which controls the rotation of the pedestal 2 in the horizontal direction so that the fire source detection device 3.4 and the nozzle device 5 are integrally opposed to the fire source position. 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 as shown in Fig. 5<A), two detection elements are installed in the monitoring area. Divide into equal parts and divide them into areas No. 1 and 1. Ward 1tNO12 will be exclusively monitored. When any of the detection elements built into the fire detector 9 detects a fire, it sends detection information to the circuit section 'jO. That is, detection information from the fire detector 9 is input to the control unit 17 via the input interface 15. Control unit 17
determines a fire based on the detection information from the fire detector 9, and when it determines that there is a fire, it activates the alarm unit 18 with a command from the control unit 17, drives the buzzer 7 and lamp 8, and displays an alarm. Then, the direction control means 6 is driven to rotate the pedestal 2, and the fire source detection devices 3, 4 and nozzle device 5 are moved to the fire occurrence area, for example, area No. Make them face each other in the 2nd direction. The control section 17 also includes a deflection angle setting section 14 for setting the vertical deflection angles of the detectors 3a and 4a.

FIG. 3 is an explanatory diagram showing the deviation angle setting performed by the deviation angle setting section 14. As shown in Figure 3, the minimum standard fire source F1 that is determined as flame on the floor and wall within the monitoring area
．． 'F2. F3. F4. F5°F6. F7. F8. F9
．． Assuming..., the deviation angle θ in the vertical direction on the straight line connecting the upper end of one side and the lower end of the other side of the reference fire sources that are adjacent to each other.
1. θ2. θ3°θ4. θ5. θ6. θ7. θ8.・・・
・Set each of the following.

Referring again to FIGS. 1 and 2, the control unit 17 is set with programs such as a deviation angle setting program by the deviation angle setting unit 14 and a calculation program for calculating the fire source position. , vertical direction control means 3b, 4b, and horizontal direction control means 3c, based on a preset control program.
4c is controlled to divide and set the fire outbreak area for each fire source detection device 3 and 4 to detect the -C fire source, and manually triangulate the detection information from the fire source detection devices 3.4h+I and others. By calculating the position of the fire source using the calculation method and rotating the mount 2 by controlling the direction control means 6 again based on the calculation result, the fire source detection devices 3 and 4 and the nozzle device 5 are integrated to detect the fire source. Opposite position. 11 is a tank for storing a fire extinguishing liquid such as a fire extinguisher or fire extinguishing water; 12 is a pump that sends the fire extinguishing liquid from the tank 11 to the nozzle 5a; 13 is a motor; and a control unit 17 where the motor 13 is obtained via an output interface 16. When activated based on the command from the fire pump 12
is driven to supply extinguishing liquid to the nozzle 58 to extinguish the fire.

FIG. 4 is a flowchart of the control unit 17, and FIGS. 5(A) and 5(B) are explanatory diagrams explaining the present invention in detail.

The operation of the present invention will be explained below in FIGS. 4 and 5 (A>(B)).
Explain with reference to.

In FIG. 4, block 21 sets the initial state in normal times. For example, horizontal direction control means 3c,
4c is controlled, and the rotation angle of the pedestal 2 is adjusted under the control of the direction control means 6 to direct the detectors 3a, 4a and the nozzle 5a together in the front direction. Also, Figure 5 (B
), the vertical direction control means 3b and 4b are controlled to direct the vertical deflection angle of the detector 4a directly downward, and also to direct the vertical deflection angle of the detector 3a toward approximately the center of the monitoring area. , for example, the deviation angle is set to θ4. In block 22, the fire detector 9 monitors the occurrence of fire in each monitoring area. For example, if a fire occurs in monitoring area No. 2 as shown in FIG. 5(A), the fire detector 9 detects the flame F and proceeds from block 22 to block 23, where direction control means 6
to drive. The pedestal 2 is rotated horizontally by the direction control means 6, and the detectors 3a, 4a and nozzle 5a are integrally opposed to each other in the direction of area No. 62, and in block 24, the detectors 3a, 4a are instructed to perform flame detection operation. do. That is, the deflection angle in the vertical direction is such that the detector 4a is directly downward, and the detector 3a is
is set to the deviation angle θ4, and the horizontal direction control means 3c,
4c to each detector 3a.

While keeping the vertical deviation angle of 4a at the initial value, area No.
, 2 are sequentially scanned in the horizontal direction. In block 25, it is determined whether or not the detector 3a has detected a flame. If no flame has been detected, the process proceeds to block 26 and the detection information from the detector 4a is decoded.

In block 26, if no flame detection information is obtained, the process proceeds to block 27, and the vertical direction control means 3b, 4b
is driven to deviate the vertical direction angle of each detector 3a, 4a upward by a predetermined angle. That is, as shown in FIG. 3, the vertical deflection angle of the detector 4a is set from the downward direction to the deflection angle θ1, and the detector 3a is set to the deflection angle θ5 from the deflection angle θ4. Further, the process proceeds to block 24, in which the horizontal direction control means 3b, 4b are driven to detect the detector 3a.
, 4a in the vertical direction are respectively θ5. The area N092 is scanned in the horizontal direction while maintaining the angle θ.

Similarly, the vertical deviation angle of each detector 3a, 4a is set upward by a predetermined angle stepwise based on a preset deviation angle setting program, and detection is performed at each deviation angle. The flame searching operation is repeated by horizontally scanning the area N002 with the vessels 3a and 4a. Here, if the search operation of the detectors 3a and 4a progresses and the detector 4a detects a flame, the process proceeds from block 26 to block 28, where the horizontal direction control means 3C and the vertical direction control means 3b of the fire source detection device 3 are detected. is driven to direct the detector 3a in the direction of the flame. In block 30, the size of the flame is determined based on the information from the detectors 3a and 4a, and if the size of the flame is less than a predetermined size, it is determined that there is no fire and the process returns to block 21. , set to the initial state and monitor the occurrence of fire. In addition, if the size of the flame in block 30 is larger than a predetermined size, it is determined that there is a fire, and block 30
1, the buzzer 7 is sounded and the lamp 8 is lit to display an alarm. Proceed further to block 32,
By driving the direction control means 6 to control the rotation of the pedestal 2, the fire source detection devices 3, 4 and the nozzle device 5 are integrally opposed to each other in the direction of the flame. In block 33, the orientation angles of the detectors 3a, 4a are deviated from the flame as the pedestal 2 rotates, and readjustment is performed. Point it in the direction of the flame.

In block 34, detection information is collected with the detectors 3a and 4a facing the flame, and based on the detection information from the detectors 3a and 4a, the exact position of the flame, that is, the distance and height to the flame, is collected. Calculate the value. The nozzle device 5 is controlled based on the result of this calculation, and in block 35, the radiation direction control means 5b is operated to control the vertical directivity angle of the nozzle 5a and direct the injection port in the direction of the flame. block 36
Then, the radiation state control means 5C is operated to adjust the opening degree of the injection port of the nozzle 5a and control the discharge state in which the extinguishing liquid is discharged. In block 37, the motor 13 is activated to operate the fire extinguishing pump 12, and discharge extinguishing liquid from the nozzle 5a to start fire extinguishing activities. The block 38 monitors whether the fire has been extinguished based on the detection information from the fire detector 9. If the fire is not completely extinguished, the block 38 returns to the block 34 and detects the fire again. The fire source position is calculated by collecting detection information from the devices 3a and 4a, and based on the calculation results, the radiation direction and radiation state of the nozzle 5a are readjusted to continue firefighting operations. After confirming that the fire is completely extinguished in block 38, proceed to block 3 and motor 1.
3 and the fire pump 12 are turned off to stop firefighting. In block 40, the buzzer 7 and lamp 8 are turned off to stop the alarm, and the process returns to block 21, where the detector 3a,
Fire monitoring is performed by setting the directivity angles of each of 4a to the initial state.

In the above embodiment, the vertical deviation angle of the detector 3a is set as the initial setting in block 21 in FIG. The individual deviation angles θ1 necessary to scan the entire area of the monitoring area are determined by the deviation angle settings set according to the shape and width of the area. θ2°θ3. ...θ8. ... is obtained, and the number N of deviation settings of the vertical deviation angle required to scan the entire monitoring area can be used as a sieve. Therefore, the initial setting of the vertical deviation angle of the detector 3a can be changed. If the position is set to 1/2 of the set number of times N, it is possible to efficiently search for a fire within the entire monitoring area including the floor and wall surfaces of the monitoring area.

FIG. 6 is an explanatory diagram showing another embodiment of the deviation angle setting section 14 shown in FIG. 2. In this embodiment, in view of the fact that the detectors 3a and 4a that detect infrared rays from flames have a predetermined viewing angle θO, a beam line that falls within the viewing angle θ0 is assumed, and the reference fire sources that are adjacent to each other are Vertical deviation angle θ1 on the beam line connecting the upper end of one side and the lower end of the other side. θ2.
θ3. ...θ7. A deflection angle setting section is provided to set..., and the vertical direction control means 3b is controlled by a - command from the deflection angle setting section.
, 4b. Note that the other device configurations are the same as in FIG. 2.

(Effects of the Invention) As described above, according to the present invention, there is provided a detector for detecting a fire source generated in a monitoring area, a vertical direction control means for scanning the detector in the vertical direction, and a horizontal control means for scanning the detector in the vertical direction. In a flame detection device equipped with a horizontal direction control means that scans in the direction, a plurality of minimum reference fire sources that are determined as flames are assumed in advance on the floor and wall surfaces in the monitoring area, and reference fire sources that are adjacent to each other are assumed. A reach angle setting section for setting a vertical deviation angle on the beam line connecting the upper end of one side and the lower end of the other side is provided, and the vertical direction control means is driven based on a command from the deviation angle setting section. By doing so, it is possible to efficiently search for the fire source throughout the monitoring area.

In addition, after searching for a fire source, without further dividing the vertical deflection angle before and after the deflection angle at which the fire source was searched,
Detectors 3a and 4 at the same deviation angle used for fire source search
The exact location of the fire source can be calculated based on the detection information from a. That is, the position of the fire source can be detected based on the detection information obtained at the same time as the search for the fire source, and the unique effect of expediting fire extinguishing operations can be obtained.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram showing the usage state of the present invention, Fig. 2 is a block diagram showing the circuit configuration of Fig. 1, Fig. 3 is an explanatory diagram showing deviation angle setting, and Fig. 4 is a flow chart. , Figure 5 (
A) is a plan view showing the operation of Fig. 1, Fig. 5 (B) is a side view of Fig. 5 (A), and Fig. 6 shows the deviation angle setting of another embodiment of the present invention. It is an explanatory diagram. 1: Automatic fire extinguishing device 2: Frame 3.4: Fire source detection device 3a, 4a: Detector 3b, 4b: Vertical direction control means 3c, 4c: Horizontal direction control means 5: Nozzle device 6 Two-way control means 7: Buzzer 8: lamp 9: fire detector 10: circuit section 11: tank 12: fire pump 13: motor 14: deviation angle setting section 15: input interface 16: output interface 17: side leg section 18: alarm section Fl, F2. F3. ...F9; Standard fire source F: Flame

Claims (1)

[Claims] A flame detector comprising: a detector for detecting a fire source occurring within a monitoring area; a vertical control means for scanning the detector in a vertical direction; and a horizontal control means for scanning the detector in a horizontal direction. In the detection device, a plurality of minimum reference fire sources that are identified as flames are assumed in advance on the floor and wall surfaces in the monitoring area, and a beam line that is perpendicular to the beam line connecting the upper end of one of the reference fire sources and the lower end of the other of the adjacent reference fire sources is assumed in advance. 1. A flame detection device comprising: a deflection angle setting section for setting a deflection angle in a direction; and the vertical direction control means is driven based on a command from the deflection angle setting section.