JPH034086B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention provides a method for detecting an actual flame occurring within a monitoring area;
The present invention relates to a fire point detection device that detects only actual flames by separating them from virtual flames reflected from puddles, window glass, mirrors, etc. in the monitoring area.

(Prior Art) Conventionally, in an automatic fire extinguishing system that automatically detects the position of the fire point and extinguishes the fire, when it detects the occurrence of a flame in a monitoring area, it first drives and scans a pair of flame detection elements, and If the flame is larger than a predetermined size, according to the calculation result based on the detection information from
Alternatively, if the light energy exceeds a predetermined value, the nozzle is directed to the position of the flame, and extinguishing liquid is released to extinguish the flame.

Furthermore, in order to detect flames generated within the monitoring 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. When a flame is detected and one of the pair of flame detection elements detects a flame, the other flame detection element stops scanning and is directed in the direction of the flame, and the detection information from the pair of flame detection elements is Based on this, triangulation was used to calculate the distance to the flame, the angle, and the size of the flame.

(Problem to be solved by the invention) However, there are puddles of water, window glass, etc. within the monitoring area.
If there is something with good reflectivity, such as a mirror, the light energy of the flame may be reflected by a puddle, window glass, mirror, etc., and 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 while the flame detection element is scanning, the flame is larger than a predetermined size or larger than a predetermined size. With light energy, there was a problem in that the virtual image flame was judged to be a fire point and extinguishing liquid was 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 method based on detection information from a pair of flame detection elements, the size of the monitoring area, i.e. Height H, width W,
Enter the length L and the positional information of the pair of detection elements, that is, the height from the floor and the distance to the four walls, and use the input room constant and the positional information of the pair of detection elements to determine the range to be monitored by the pair of flame detection elements. That is, the distance and angle are calculated in the table creation section and stored in the monitoring area storage section, and the distance and angle to the flame calculated based on the detection information from the pair of flame detection elements and stored in the monitoring area storage section. The flame point position comparison unit compares the detected values, and if the detection information from a pair of flame detection elements exceeds the monitoring range, it is assumed to be a virtual flame and only the actual flame is extinguished. It is.

(Example) Hereinafter, an example of the present invention will be described 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, the configuration will be described. Reference numeral 1 denotes an automatic fire extinguishing device main body, and a pair of flame detection devices 3 and 4 are installed on a pedestal 2 at a predetermined interval. The flame detection device 3 includes a detection element 3a that detects flame;
vertical direction control means 3b for vertically controlling the
A horizontal direction control means 3c that controls the detection element 3a in the horizontal direction is provided. The flame detection element 4 includes a detection element 4a that detects flame, a vertical control means 4b that controls the detection element 4a in the vertical direction, and a horizontal control means 4 that controls the detection element 4a in the horizontal direction.
c. Detection elements 3a, 4a
Both have an infrared sensor that detects 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 direction control means 3b, 4b and horizontal direction 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. Means 5b
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, thereby directing the flame detection devices 3 and 4 and the nozzle device 5 together 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. 2, the signal is output to the control section 17 via the input interface 15 built into the circuit section 10. 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 inputs in advance the length L, width W,
The distance of the height H 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 input using the input switch when installing the automatic fire extinguishing system 1 in the monitoring area. be. 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 section 20,
The table creation unit 20 calculates the range to be monitored by the flame detection elements 3a and 4a, that is, the distance and angle, based on the information about the room and the position information of the pair of detection elements, and the calculation result determines whether the flame is a virtual image or an actual flame. It is stored in the monitoring area storage unit 21 as a reference value for classification.

The flame point position comparison section 22 includes flame detection elements 3a and 4a.
The flame detection information in the monitoring area from the flame detector is input via the input interface 15, and the distance and angle to the flame are calculated based on the detection information and the distance to determine the range to be monitored by the flame detection elements 3a and 4a. The angle is compared with the value in the monitoring area storage unit 21 that stores the angle. The control unit 17 controls 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 flame point position comparison unit 22.
Outputs a control signal to.

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 is connected to the tank 1
The extinguishing liquid stored in the nozzle 1 is sent to the nozzle 5a, and is supplied by the operation of the motor 13. The fire pump 12 is driven by a control signal outputted from the control unit 17 via the output interface 16, and performs fire extinguishing activities by supplying fire extinguishing liquid to the nozzle 5a.

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 the initial state during normal operation. In block b, fire monitoring section 9
monitors the occurrence of fire within the monitoring area by dividing it into three monitoring areas using two fire detectors, and when a fire is detected, the process proceeds to block c. In block c, the direction control means 6 is driven to direct toward the center of the monitoring area where the flame has been detected out of the three monitoring areas divided by the fire monitoring section 9. In block d, the horizontal direction control means 3c, 4c are driven. The flame detection devices 3 and 4 are initially set to have a deflection angle in the downward direction, and in that state, they start scanning in the horizontal direction.
Explore the 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 first detects flame detection element 4.
Processing a is performed when a flame is detected. In this case, block i stops the scanning of the other detection element 3a and controls the detection element 3a in the direction of the flame. Flame detection elements 3a, 4
If no flame is detected in a, proceed to block g. In block g, vertical control means 3b, 4
b is driven to set the vertical deviation angles of the detection elements 3a and 4a upward by a predetermined angle from the initial state, that is, from directly below. Again in block d, the horizontal direction control means 3c, 4c are driven while maintaining a predetermined angle in the vertical direction. Thereafter, the vertical deviation angles of the flame detection elements 3a and 4a are driven step by step based on the set deviation angle program until a flame is detected, each time maintaining a predetermined angle in the vertical direction. At the same time, the horizontal direction control means 3c and 4c are driven. When the flame detection elements 3a, 4a detect a flame, the process proceeds to block j. In block j, when a flame is detected, the alarm section 18 is activated, the buzzer 7 and the lamp 8 are driven to display an alarm, and the process proceeds to block k. In block k, the direction control means 6 is directed to some extent in the direction of the flame in the monitoring area based on the detection information from the flame detection elements 3a, 4a. In block 1, the distance and angle to the flame are calculated using the triangulation method based on the detection information from the flame detection elements 3a and 4a, 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 flame point position comparison section 2
2, the calculation result and the flame detection elements 3a, 4a
It is determined whether the distance to the detected flame is within the monitoring area or not based on the calculated value that is compared with the value stored in the monitoring area storage unit 21 in which the range to be monitored, that is, the distance and angle is stored.

For example, in Figure 4, an actual flame D is placed on the reflective surface C.
is reflected, the distance to the actual flame D via the reflective surface C based on the detection information from the flame detection elements 3a and 4a is (GH+HD). but,
Since the angle in the detection information from the detection elements 3a and 4a is ψ, the actual flame D caused by the reflecting surface C
The straight line distance (GH+HE) to the virtual image E of is calculated as the fire point position.

The monitoring area storage unit 21 includes flame detection elements 3a and 4.
Since the range to be monitored at a, that is, the distance GH that gives the limit of the monitoring area corresponding to the angle ψ is stored, the detected distance that exceeds the limit distance GH is reflected by the reflection surface C by the comparison calculation of the fire point position comparison section 22. It is determined that this is due to the virtual image E of the actual flame. 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 3.
The vertical deviation angles of a and 4a are increased by one step, and the horizontal control means 3c and 4c are driven while maintaining a predetermined angle in the vertical direction in block o. When the flame detection elements 3a, 4a detect a flame in block n, the process proceeds to blocks l and m again. If no flame is detected, the flame detection elements 3a, 4a are turned off until flame is detected.
The horizontal direction control means 3c, 4c are driven step by step based on the set deviation angle program, and each time the horizontal direction control means 3c, 4c are driven while maintaining a predetermined angle in the vertical direction. 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 nozzle 5a is directed to the position of the flame obtained from the detection information from the flame detection elements 3a and 4a by driving the radiation direction control means 5b. 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 radiation state control means 5c. block t
Then, the fire extinguishing action is carried out by driving the fire extinguishing pump 12 to supply extinguishing liquid to the nozzle 5a. 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 v. When fire detection information is received, 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 advances to blocks S and t.

Since the flame has been completely extinguished in block v, the fire pump 12 is stopped, and the block further advances to block w, where the alarm unit 18 is activated, the buzzer 7 and the lamp 8 are stopped, and the block a is returned to detect the flame. Fire monitoring is continued by setting the directivity angles of the elements 3a and 4a to their initial states.

In the above embodiment, when it is determined that the detected flame is a virtual image, the pair of flame detection elements continue to search for flames in the monitoring area step by step. If it is known that there are objects with good reflectivity, such as window glass or mirrors, in the monitoring area, when a pair of flame detection elements detects a virtual image of flame caused by these reflective objects, the actual flame will be detected. If a certain position is calculated from the reflection angle, etc. and stored in advance, and it is determined that it is a virtual flame from the detection information of a pair of flame detection elements during monitoring, the stored actual position of the flame will be calculated according to the reflection position. By reading out the flame 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, the width, the 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 compared with the values stored in the monitoring area storage part. but,
Another example is the size, i.e. height, of the monitored area;
The 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 as they are in the monitoring area storage unit, and when the pair of detection elements detects flame, outputs the stored value to the spark point position comparison section, calculates the range to be monitored by the pair of detection elements, that is, distance and angle, and compares the calculated value with the detection from the pair of detection elements. By using a configuration that compares the distance and angle to the flame calculated based on the information, the room constant input device and the table creation section can be omitted, so the configuration can 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 fire point position comparison unit to distinguish whether it is an actual flame or a virtual flame.
There are reflective objects such as puddles, mirrors, and window glass in the monitoring area, and even if light from the flame is captured by a pair of detection elements due to these reflective objects, it may be mistakenly identified as the flame spot position due to a virtual image. Fire extinguishing control can be avoided, and the reliability of the automatic fire extinguishing system can be greatly improved.

[Brief explanation of drawings]

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, FIG. FIG. 3 is a diagram showing the relationship between an actual flame and a virtual image flame when a detection element detects 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 : Direction 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, 2
0: Table creation section, 21: Monitored area storage section, 2
2: Flash point position comparison section.

Claims (1)

[Claims] 1. 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 in advance 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 detect the actual flame. A fire point detection device characterized in that it is provided with a fire point position comparison section for distinguishing whether the flame is a virtual flame or a virtual image flame.