JPS61296208A - Apparatus for detecting fire point - Google Patents

Abstract

PURPOSE:To enhance the reliability of an automatic fire extinguishing apparatus, by preliminarily storing the size of an area imparting monitor limit and comparing the stored value with the distance and angle up to a flame operated on the basis of the information from a detection element to discriminate the true existence of the flame. CONSTITUTION:The information of a room preliminarily inputted from a room constant input apparatus 19 and the positional informations of a pair of detection elements 3a, 4a are outputted to a table forming part 20. Hereupon, the operation of the range monitored by the detection elements 3a, 4a is performed and the operation result is stored in a monitor area memory part 21 as a reference value for discriminating the true existence of a flame. A fire point position comparing part 22 inputs the flame detection informations in the monitor area from the detection elements 3a, 4a through an input interface 15 and compares the operation result of the distance and angle up to the flame on the basis of said informations with the value stored in the memory part 21. Therefore, when the detection informations from a pair of detection elements 3a, 3b exceed the monitor range, the flame of a virtual image is judged and only an actual flame can be distinguished.

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention is a method that combines an actual flame generated within a monitored area and a virtual image of flame obtained by reflection from puddles, window glass, mirrors, etc. within the monitored area. This invention relates to a fire point detection device that detects only the actual flame by separating the flames from the flames.

(Prior Art) Conventionally, in an automatic fire extinguishing system that automatically detects the position of a fire point and extinguishes the fire, when a fire outbreak in a monitoring area is detected, it first drives and scans a pair of flame detection elements, According to the calculation results based on the detection information from I try to extinguish the fire.

Furthermore, in order to detect flames that occur within the monitored area at an early stage,
The monitoring area is divided into two equal parts corresponding to a pair of flame detection elements, and the divided monitoring area corresponding to each flame detection element is individually scanned to detect a flame. If a flame is detected, the scanning of the other flame detection element is stopped and it is directed in the direction of the flame, and based on the detection information from the pair of flame detection elements, the distance, angle, and distance to the flame are determined using the triangular side m method. They were calculating the size of the flames, etc.

(Problem to be solved by the invention) However, if there is a highly reflective object such as a puddle, window glass, or mirror within the monitoring area, the light energy of the flame will be reflected by the puddle, window glass, mirror, etc. The flame may enter the flame detection element. In this case, both the actual flame and the virtual image flame exist within the monitoring area, and if the virtual image flame is detected first during scanning of the flame detection element, the flame is larger than a predetermined size or larger than a predetermined size. If it were light energy, there was a problem in that the virtual image flame would be judged as a fire point and extinguishing liquid would be released.

(Means for Solving the Problems) The present invention has been made in view of the above problems, and provides a fire point detection device that distinguishes between an actual flame and a virtual flame, and reliably detects an actual flame. Therefore, in a fire point detection device that calculates the distance and angle to the flame by triangulation based on detection information from a pair of flame detection elements, the size of the monitoring area, That is, the height is 1. Horizontal W
, input the position information of the IL and the pair of detection elements, that is, the height from the floor and the distance to the four walls, and monitor with the pair of flame detection elements based on the input room constant and the position information of the pair of detection elements. The range, that is, the distance and angle, are calculated in the table creation unit and stored in the monitoring area storage unit, and the distance and angle to the flame are calculated based on the detection information from the pair of flame detection elements,
The value stored in the monitoring area storage unit is compared with the flame point position comparison unit, and if the detection information from the pair of flame detection elements exceeds the monitoring range, it is regarded as a virtual flame and only the actual flame is detected. It was designed to extinguish a fire.

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

FIG. 1 is an overall configuration diagram showing one embodiment 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 the automatic fire extinguishing system main body,
A pair of flame detection devices @3 are placed on the pedestal 2 at a predetermined interval.
4 is installed. The flame detection device 3 includes a detection element 3a that detects a flame, a vertical control means 3b that controls the detection element 3a in the vertical direction, and a horizontal control means 3C that controls the detection element 3a in the horizontal direction. The flame detection element 4 includes a detection element 4a that detects flame, a vertical direction control means 4b that controls the detection element 4a in the vertical direction, and a detection element 4a that controls the detection element 4a in the vertical direction.
horizontal direction control means 4C for controlling the horizontal direction. Both of the detection elements 3a and 4a have an infrared sensor that detects the infrared light energy radiated from the flame in an analog manner, and outputs flame detection information corresponding to the radiant energy from the flame, that is, the intensity of the infrared rays.

Vertical control means 3b, 4b and horizontal control means 3c
.

4C independently controls each detection element 3a, 4a, and scans the monitoring area corresponding to each one. The nozzle device 5 is installed at the center of rotation of the pedestal 2, and includes a nozzle 5a that emits extinguishing liquid and a radiation direction control that directs the nozzle 5a to the position of the flame obtained from the detection information from the flame detection devices 3 and 4. and a radiation state control means 5C that controls the radiation state by adjusting the opening degree of the injection port of the nozzle 5a in accordance with the size of the flame and the distance to the flame. The direction control means 6 controls the rotation of the pedestal 2 in the horizontal direction.
The flame detection devices @3, 4 and the nozzle device 5 are integrally directed in the direction of the flame. 7 is a buzzer, 8 is a lamp, and 9 is a fire monitoring section for overall monitoring.

When the fire monitoring section 9 detects a flame, it outputs fire detection information to the circuit section 10. That is, as shown in FIG.
The signal is output to the control unit 17 via the input interface 15 built into the 0. The control unit 17 determines whether there is a fire based on the fire detection information from the fire monitoring unit 9 and the flame detection information from the flame detection elements 3a and 4a, and if it determines that there is a fire, it outputs a control signal and activates the alarm unit. 18 to drive the buzzer 7 and lamp 8 to display an alarm. The room constant input device 19
When the automatic fire extinguishing system 1 is installed in the monitoring area, the input switch is used to input the length, width W, and height H of the building and the position information of the pair of detection elements, that is, the height from the floor and the distance to the four walls. It is input using .

The room information and the position information of the pair of detection elements input from the room constant input device 19 are output to the table creation unit 20, and the table creation unit 20 generates a flame based on the room information and the position information of the pair of detection elements. The detection elements 3a and 4a calculate the range to be monitored, that is, the distance and angle, and the calculation results are stored in the monitoring area storage section 21 as a reference value for distinguishing between a virtual flame and an actual flame.

The flame point position comparison unit 22 inputs flame detection information within the monitoring area from the flame detection elements 3a and 4a via the input interface 15, and calculates the distance and angle to the flame based on the detected information. A monitoring area storage unit 21 that stores distances and angles that determine the range to be monitored by the flame detection elements 3a and 4a.
Compare with the value of . The control section 17 outputs a control signal to the flame detection devices 3 and 4 and the nozzle device 5 via the output interface 16 based on the comparison calculation result output from the fire point position comparison section 22.

The deflection angle setting unit 14 sets in advance a deflection angle for vertically operating the detection elements 3a, 4a stepwise based on the size of the monitoring area. The tank 11 stores a fire extinguishing liquid such as a fire extinguisher or fire extinguishing water. The fire pump 12 pumps the fire extinguishing liquid stored in the tank 11 through the nozzle 5.
a, and is supplied by the operation of the motor 13.

The fire pump 12 is driven by a control signal output from the control unit 17 via the output interface 16, and the nozzle 5
Perform fire extinguishing activities by supplying fire extinguishing liquid to a.

FIG. 3 is a flowchart showing the control operation of the control section 17. Figure 4 shows the relationship between the virtual image flame detected by the pair of flame detection elements and the actual flame when a pair of flame detection elements detects a virtual image flame when the monitoring area is viewed from the ceiling. FIG. The operation will be explained with reference to FIGS. 3 and 4. In FIG. 3, block a sets an initial state during normal operation. In block b, fire monitoring section 9
detects the occurrence of fire within the monitored area using two fire detectors.
The area is divided into two monitoring areas, and if a fire is detected, the area moves to Block C. In block C, the direction control means 6 is driven to direct the fire to the center of the monitoring area where the flame has been detected out of the three monitoring areas divided by the fire monitoring unit 9. In block d, the horizontal direction control means 3c and 4c are driven. The flame detection device 3.4 has an initial deviation angle set in advance in the downward direction, and in that state starts scanning in the horizontal direction to search for flames. When one flame detection element 3a detects a flame in block e, the scanning of the other flame detection element 4a is stopped in block f, and control is performed in the direction of the detected flame. Block h is processing when the flame detection element 4a first detects a flame, and in this case, block 1 stops scanning of the other detection element 3a and controls it in the direction of the flame. flame detection element 3a,
If no flame is detected in 4a, proceed to block q. In block q, the vertical direction control means 3b and 4b are driven to set the vertical deviation angles of the detection elements 3a and 4a to a predetermined angle from the initial state, that is, from directly below.

Again in block d, while maintaining a predetermined angle in the vertical direction, the horizontal direction control means 3c.

Drives 4C. Thereafter, until a flame is detected, the vertical deviation angles of the flame detection elements 3a and 4a are driven step by step based on the set deviation angle program, and each time,
horizontal direction control means 3c that maintains a predetermined angle in the vertical direction;
Drive 4G. When the flame detection elements 3a and 4a detect a flame, the process proceeds to block j. In block j, when a flame is detected, the alarm unit 18 is activated, the buzzer 7 and the lamp 8 are driven to display an alarm, and the process proceeds to block k. In the block, the direction control means 6 is directed in the direction of the flame to the extent that it is within the monitored area based on the detection information from the flame detection elements 3a, 4a.

In Brokkuru, flame detection element 3a.

Based on the detection information from 4a, the distance and angle to the flame are calculated using the triangulation method, and the process proceeds to block m. In block m, the calculation results of the distance and angle to the flame calculated in block 1 are output to the flame point position comparison section 22, and the calculation results and the flame detection elements 3a and 4
It is determined whether the distance to the detected flame is within the monitoring area based on the calculated value calculated by comparing the range to be monitored in step a, that is, the value stored in the monitoring area storage unit 21 in which the distance and angle are stored.

For example, in FIG. 4, when the actual flame is reflected on the reflective surface C, the distance to the actual flame via the fouling surface C based on the detection information from the flame detection elements 3a and 4a is (GH
10FID>. However, since the angle between the detection information from the detection elements 3a and 4a is ψ, the straight line distance (Gt-1+H
Calculate E> as the fire point position.

Since the monitoring area storage unit 21 stores the range to be monitored by the flame detection elements 3a and 4a, that is, the distance GH that gives the limit of the monitoring area corresponding to the angle ψ, the ignition point position comparison unit 22
By the comparison calculation, it is determined that the detected distance exceeding the limit distance GH is due to the virtual image E of the actual flame reflected on the reflecting surface C. If it is determined that the flame is outside the monitoring range, that is, it is a virtual flame, the process proceeds to block p. In block p, the vertical direction control means 3b, 4b are driven to detect the flame detection element 3a.

4a is increased by one level, and while maintaining a predetermined angle in the vertical direction in block O, the horizontal direction control means 3
c, drives 4c. Flame detection element 3 in block n
When a, 4a detects flame, block ll,, m again
Proceed to. If a flame is not detected, the vertical deviation angles of the flame detection elements 3a and 4a are driven step by step based on a set deviation angle program until a flame is detected, and each time the vertical deviation angle is set to a predetermined value. Horizontal direction control means 3 while maintaining the angle
c.

Drives 4C. If it is determined in block m that it is an actual flame, the process proceeds to block q, where a fine adjustment drive is performed to ensure that the direction control means 6 faces the direction of the flame, and the process proceeds to block r.

In block r, the radiation direction control means 5 moves the nozzle 5a to the position of the flame obtained from the detection information from the flame detection elements 3a and 4a.
Drive b to direct. In block S, the opening degree of the injection port of the nozzle 5a is adjusted in accordance with the size of the flame and the distance to the flame, and the radiation state is controlled by the release state control means 5C. In block t, the fire pump 12 is driven and the nozzle 5a is
Extinguish the fire by supplying extinguishing liquid to the area. In block U, in order to confirm whether the flame has been extinguished by fire extinguishing activities, it is checked whether there is fire detection information from the fire monitoring section 9, and if the fire has been extinguished, the process proceeds to block (2). If there is fire detection information, the process returns to block r, moves the nozzle 5a again to the position of the flame, drives the radiation direction control means 5b, directs it in the direction of the flame, and proceeds to blocks s and t.

Since the flame has been extinguished in block ■, stop the fire pump 12, proceed to block W, and proceed to alarm unit 8.
is activated to stop the buzzer 7 and lamp 8, and return to block a again to detect the flame detection element 3a.

Fire monitoring is continued by setting each directivity angle of 4a to the initial state.

In the above embodiment, when it is determined that the detected flame is a virtual image, the pair of flame detection elements are configured to continue searching for flame in the monitoring area in stages. If the location of highly reflective objects such as window glass or mirrors in the monitoring area is known, the virtual image of flame caused by these reflective objects can be detected by a pair of flame detection elements. A certain position is calculated from the reflection angle, etc. and stored in advance, and during monitoring (if it is determined that it is a virtual flame from the detection information of a pair of flame detection elements, the stored actual flame By reading out the position and scanning the pair of flame detection elements in that direction, the actual flame can be quickly detected even if there is a virtual image.

Furthermore, in the above embodiment, an input switch is used as a room constant input device to input in advance the size of the monitoring area, that is, the height, width, and length, and the position information of a pair of detection elements, that is, the height from the floor and the four directions. Input the distance to the wall, calculate the range to be monitored by the pair of detection elements, that is, the distance and angle, in the table creation section based on the input room constant and the position information of the pair of detection elements, and store the calculated values in the monitoring area memory. The distance and angle to the flame calculated based on the detection information from the pair of detection elements are stored in the fire point position comparison part and are compared with the values stored in the monitoring area storage part. However, in another embodiment, the size of the monitoring area, that is, the height, horizontal and vertical distances, and the position information of the pair of detection elements, that is, the height from the floor and the distance to the four walls, are stored in the monitoring area storage part as they are. When the pair of detection elements detects a flame, the stored value is output to the flame point position comparison section, and the flame point position comparison section determines the range monitored by the pair of detection elements, that is, the distance. The room constant input device and the table creation section can be omitted by configuring the system to calculate the angle and the distance to the flame and compare the calculated value with the distance and angle to the flame calculated based on the detection information from the pair of detection elements. This allows the configuration to be simplified.

(Effects of the Invention) As described above, according to the present invention, a flame generated in a monitoring area is detected by a pair of detection elements, and the distance and angle to the flame are determined based on the detection information from the detection elements. In the fire point detection device that calculates, the size of the monitoring area that provides the monitoring limit is stored in advance in the monitoring area storage unit, and the distance and angle to the flame are calculated based on the detection information from the pair of detection elements, The value stored in the monitoring area storage unit at this detection angle is compared with the value stored in the monitoring area storage unit in the flash point position comparison unit to distinguish whether it is an actual flame or a virtual flame. Even if there are reflective objects and these reflective objects capture the light from the flame with a pair of detection elements,
Since the fire spot position is determined to be based on a virtual image, erroneous extinguishing control can be avoided, and the reliability of the automatic fire extinguishing system can be greatly improved.

[Brief explanation of the drawing]

FIG. 1 is an overall configuration diagram showing an embodiment of the present invention, FIG. 2 is a block diagram showing the circuit configuration of FIG. 1, and FIG. 3 (A>
and (B-) are flowcharts, and FIG. 4 is a diagram showing the relationship between the actual flame and the virtual image flame when a pair of flame detection elements detect the virtual image flame. 1: Automatic fire extinguishing device 2: Frame 3.4: Flame detection device 3a, 4a: Flame detection element 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 monitoring section 10: Circuit section 11: Tank 12: Fire pump 13: Motor 14: Deflection angle setting section 15: Input interface 16: Output interface 17: Control section 18: Alarm section 19: Room constant input Device 20: Table creation section 21: Monitored area storage section 22: Flash point position comparison section

Claims (1)

[Claims] A fire point detection device that detects a flame generated within a monitoring area using a pair of detection elements, and calculates the distance and angle to the flame based on the detection information from the pair of detection elements, A monitoring area storage unit that stores the size of the monitoring area and the distance and angle to the flame calculated based on detection information from a pair of detection elements are compared with the values stored in the monitoring area storage unit to determine whether the flame is an actual flame. 1. A fire point detection device comprising a fire point position comparing section for distinguishing whether the flame is a virtual image flame.