JPH0366627B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a fire source position detection device that detects a fire source position by horizontally and vertically scanning a warning area using a fire source detector.

(Prior art) Conventionally, in large-space structures such as indoor ball game stadiums and exhibition halls, heat ray detectors that detect heat rays emitted from flames during a fire are scanned horizontally and vertically to monitor the entire restricted area. For example, as shown in Figures 7 and 8, a heat ray detector 3 is installed to monitor the monitoring surface 1 of the restricted area from diagonally above, and the horizontal scanning angle at the time of detecting the fire source is The coordinates (X, Y) of the fire source position are calculated based on θ, the vertical scanning angle α, and the installation height of the fire source detector relative to the floor of the warning area, and, for example, the direction of the fire extinguishing nozzle is controlled to extinguish the fire. I have to.

(Problem to be Solved by the Invention) However, in the case of a device that detects the location of a fire source by horizontal and vertical scanning of such a heat ray detector, it is usually necessary to monitor flat areas, for example at a ball game field. Surface 1 is monitored by a heat ray detector 3, but when holding an event such as a concert, a stage 2 etc. may be installed in the hall, and if a fire breaks out on this stage 2, the heat ray detector 3 The detector 3 outputs a fire source detection signal when it is directed toward the fire source 4, and the horizontal scanning angle θ when detecting the fire source is
The position coordinates (X, Y) of the fire source 4 are calculated based on the vertical scanning angle α and the mounting height of the fire source detector with respect to the floor of the warning area.

However, the fire source position calculated from the horizontal and vertical scanning angles θ and α at the time of fire source detection and the mounting height of the fire source detector relative to the floor of the warning area is only a position on the flat monitoring area 1. In other words, the position of the fire source 4' that intersects with the monitoring surface 1, which is an extension of the monitoring line passing through the fire source 4 on the stage 2, is calculated, and the position of the fire source 4', which is different from the actual fire source 4, is calculated. Calculates the position.

In order to solve this problem, for example, as shown in FIG. If the position of the fire source 4 is calculated based on , even if the fire is on stage 2,
The location of the fire source can be detected accurately.

However, when two heat ray detectors are installed, the first
If a fire occurs in multiple locations at the same time as shown in Figure 0, for example, two fire sources 4a,
4b is detected, the fire source position is given by the intersection of the monitoring lines by the two heat ray detectors 3a, 3b, so that other erroneous fire sources 4 than the fire sources 4a, 4b are detected.
There was a problem in that the fire source could not be identified as the fire source was detected.

(Means for Solving the Problems) The present invention has been made in view of the above-mentioned problems of the prior art, and is applicable not only when a fire occurs at a position higher than the monitoring surface, but also when a fire occurs at multiple locations simultaneously. To provide a fire source detection device capable of accurately detecting a fire source position even when a fire source occurs.

To achieve this objective, the present invention scans the monitoring surface of the monitoring area in the horizontal and vertical directions, and outputs scanning information including a horizontal scanning angle and a vertical scanning angle indicating the location of the fire source when a fire source is detected. Two fire source detectors such as heat ray detectors are installed, and the surveillance area is usually monitored by scanning the first fire source detector.Once the detection output of this first fire source detector is obtained, , determine the number of fire sources from one scan of the monitored area, and if the number of fire sources is one, activate a second fire source detector to obtain information from one scan; Calculating the fire source position based on the horizontal scanning angle and vertical scanning angle of the fire source position obtained by the first and second fire source detectors and the installation height of the fire source detector with respect to the floor surface of the caution area; If there are multiple fire source locations, the second fire source detector is not activated and the horizontal scan angle and vertical scan angle obtained by scanning the first fire source detector, as well as the warning area. A plurality of fire source positions are calculated from the mounting height of the fire source detector relative to the floor surface.

(Embodiment) FIG. 1 is a block diagram showing an embodiment of the present invention.

First, the configuration will be described. 10a is a first fire source detector, 10b is a second fire source detector, and for example, the one shown in FIG. 2 is used.

In FIG. 2, the fire source detector has a rotating part 12 that is rotationally driven by a motor with respect to a base 11,
A detection unit 13 is installed on top of this rotating unit 12, and as shown in FIG.
It will be monitored from diagonally above.

The detection unit 13 is provided with a rotating mirror 15 that is rotated at a constant speed by a motor 14, and the vertical detection range 16 of the monitoring surface is
is scanned, and an optical image of the instantaneous field of view 16a is incident on the detection element 20 via the objective lens 17, the reflecting mirror 18, the slit 19, and the condensing lens 19a. As the detection element 20, for example, an infrared sensor that detects infrared rays from a flame is used. In the fire source detector having such a structure, the rotation angle θ of the rotating part 12 around the horizontal axis and the vertical rotation angle α of the rotating mirror 15 are outputted to the outside as position information accompanying detection of the fire source. Ru.

Referring again to FIG. 1, the first and second fire source detectors 10a, 10b include scanning circuits 21a, 21b.
The first fire source detector 10a is equipped with a scanning circuit 21.
On the other hand, the second fire source detector 10b is normally scanned and driven by the scanning circuit 21b.

The outputs of the fire source detectors 10a and 10b are output from vertical scanning angle detection circuits 22a and 22b and horizontal scanning angle detection circuit 2.
3a and 23b, and the horizontal scanning angle detection circuits 23a and 23b always output a horizontal scanning angle θ signal in accordance with the horizontal scanning of the detector. On the other hand, the vertical scanning angle detection circuits 22a and 22b are connected to the fire source detector 10.
Only when a fire source is detected by a detection element such as an infrared sensor provided at a or 10b, a vertical scanning angle α signal at the time of fire source detection is output. Therefore, the detection α signals of the vertical scanning angle detection circuits 22a and 22b have a meaning as a fire detection signal.

Next, to explain the side of the first fire source detector 10a which is constantly scan-driven, the vertical scanning angle detection circuit 22
The output of a is given to a monitoring area discriminating circuit 24a schematically shown by a comparator, and a setting signal from the monitoring area setting circuit 25 is given to the monitoring area discriminating circuit 24a as a discrimination criterion. Only the detected vertical scanning angle α signal within the monitoring area is determined and output is generated. The output of the monitoring area discrimination circuit 24a is given to a one scan discrimination circuit 26a and a fire source number discrimination control circuit 27. The 1-scan discrimination circuit 26a counts and discriminates the horizontal scanning angle θ using the timing when the vertical scanning angle α signal associated with fire source detection is obtained from the monitoring area discrimination circuit 24a as a scanning reference point, and determines the vertical scanning angle α associated with fire source detection. The scanning for one scan from the timing when the signal is obtained until the end of scanning all the warning areas once is determined, and when one scan scan is completed, the determination output is output to the fire source number determination control circuit 27. The fire source number discrimination control circuit 27 counts the vertical scanning angle α signal obtained via the monitoring area discrimination circuit 24a, that is, the fire source detection signal, until one scan of the warning area is completed, that is, the one scan discrimination circuit. When the number of fire sources is one, the activation signal 28 is output to the scanning circuit 21b of the second fire source detector 10b, and on the other hand, when the number of fire sources is two or more, In this case, a determination signal 29 is output. 30a is a vertical scanning angle detection circuit 22a and a horizontal scanning angle detection circuit 23
Vertical scanning angle α and horizontal scanning angle θ output from a
This is a register that temporarily stores the register 30a.
At the timing when the vertical scanning angle α is obtained, the vertical scanning angle α and the horizontal scanning angle θ at that time are stored.

Next, the second fire source detector 1 is activated when two or more fire sources are determined by the fire source number determination control circuit 27.
Looking at the 0b side, the output of the vertical scanning angle detection circuit 22b is given to the monitoring area determination circuit 24b, which determines whether the vertical scanning angle α signal at the time of fire source detection falls within a predetermined monitoring area by the monitoring area setting circuit 25. It is determined whether

Furthermore, the output of the monitoring area discrimination circuit 24b is given to the 1-scan discrimination circuit 26b, and the 1-scan discrimination circuit 26b collects information for one scan after the fire source detector 10b is activated, that is, for one scan of the entire monitoring area. We are monitoring the timing when this is obtained. 30b is a register which inputs the outputs of the vertical scanning angle detection circuit 22b and the horizontal scanning angle detection circuit 23b, and registers the vertical scanning angle α and the current value at the timing when the vertical scanning angle α signal, that is, the fire source detection signal is obtained. The horizontal scanning angle θ is stored.

The discrimination output of the 1-scan discrimination circuit 26b is applied to the register 30a as a transfer command signal via the OR gate 31, directly to the register 30b, and further applied to the first fire source position calculation circuit 32a as a calculation activation signal. register 30
a, 30b receives the discrimination output of the 1-scan discrimination circuit 26b, and outputs the vertical scanning angle α and horizontal scanning angle θ stored up to that point to the first fire source position calculation circuit 32a, and at the same time, the first fire source position calculation circuit 32a 1 receives the discrimination output of the scan discrimination circuit 26b as an operation start command, so the registers 30a and 3
Based on the information transferred from 0b, the fire source number determination control circuit 27 calculates the fire source position when the number of fire sources is determined to be one. The calculation of the fire source position by the first fire source position calculation circuit 32a is based on the horizontal scanning θ ₁ and vertical scanning angle α ₁ of the fire source position by the first fire source detector 10a and the second fire source detector 10b. The horizontal scanning angle θ ₂ and vertical scanning angle α ₂ of the fire source position as well as the positional coordinates (x, y) of the installation height of the fire source detectors 10a and 10b with respect to the floor of the guarded area are calculated.

On the other hand, when the number of fire sources is determined to be two or more, the determination output 29 of the fire source number determination control circuit 27 is given as a transfer command signal to the register 30a via the OR gate 31, and is also used for the second fire source position calculation. circuit 3
2b as a calculation start signal, and the register 30a that receives the discrimination output 29 outputs the vertical scanning angle α and horizontal scanning angle θ stored up to that point to the second fire source position calculation circuit 32b. The position coordinates (X, Y) of the fire source are calculated from the vertical scanning angle α and horizontal scanning angle θ corresponding to the source position and the installation height of the fire source detector with respect to the floor of the warning area. In the embodiment shown in FIG. 1, the registers 30a,
30b and the fire source position calculation circuits 32a and 32b are provided separately, but they may be provided as a common block.

Next, the detection operation of the embodiment shown in FIG. 1 will be explained with reference to the flowchart shown in FIG.

First, as shown in FIG. 5, the detection operation when a fire occurs in one place in the caution area will be explained.

In the normal monitoring state, as shown in block 34, the first fire source detector 10a as the first unit
only the first fire source detector 10a is activated, and the first fire source detector 10a
The determination block 36 monitors whether there is a detection output of the vertical scanning angle α signal, that is, whether a fire source detection signal is obtained. When a fire source is detected by the first fire source detector 10a, the process proceeds to a determination block 38, where the setting information of the monitoring area setting circuit 25 is compared with the warning area determining circuit 24a. Then, the vertical scanning angle α and horizontal scanning angle θ at that time are stored in the register 30a. The processing of the discrimination blocks 36 to 40 is performed based on the vertical scanning angle α
The process is repeated from the time when the signal, that is, the fire source detection signal, is obtained until one scan of the entire warning area is performed, and when the discrimination output of one scan by the one scan discrimination circuit 26a is discriminated by the discrimination block 42,
Proceed to decision block 44. In the determination block 44, for example, it is determined whether the number of horizontal scanning angles θ obtained in one scan (in the embodiment shown in FIG. 1, the number of vertical scanning angles α is counted) is one or not. In this case, as shown in FIG. 5, since a fire has occurred in one place, the process proceeds to block 46 and activates the second fire source detector 10b as the second unit. The startup of this No. 2 unit is monitored by the decision block 48,
On the condition that the device has started normally, the process proceeds to block 50, and in block 50, judgment blocks 36 to 42 are executed.
The vertical scanning angle α and horizontal scanning angle θ in one scan in the horizontal direction are stored in the register 30b by the same process as shown in FIG. Horizontal direction 1 with block 50
When the storage of α and θ in the scan is completed, the process advances to block 52, where the vertical scanning angle α and horizontal scanning angle θ stored in the registers 30a and 30b are read out and the first fire source position calculation circuit 32a is read out.
As shown in FIG. The position coordinates (X, Y) of the fire source 4 are calculated based on the mounting heights of the fire source detectors 10a and 10b with respect to the floor surface, and after the calculation, in block 54, for example, the control unit of a water cannon is instructed to detect the fire source. It outputs position information and controls the direction of the water cannon.

Next, as shown in FIG. 6, when a fire occurs in two places in the warning area, a determination block 44 is made based on the detection information of the first fire source detector 10a as the first unit.
Since two horizontal scanning angles θ are obtained based on fire source detection in this case, the second fire source detector 10b as the second unit is not activated and the process proceeds to block 56 where the register is The respective vertical and horizontal scanning angles α ₁ , θ ₁ , α ₂ , θ ₂ of the two fire sources 4a, 4b stored in 30a and the mounting heights of the fire source detectors 10a, 10b relative to the floor of the warning area From the position coordinates of fire sources 4a and 4b (X1, Y1),
(X2, Y2) is calculated and outputted to the control unit in block 58, completing the series of processing.

In this way, in the fire source detection operation of the present invention,
If there is one fire source, the detection information of two fire source detectors, i.e. horizontal scanning angles θ ₁ and θ ₂ , vertical scanning angles α ₁ and α ₂ , and each fire source on the floor of the restricted area. Since the position coordinates (X, Y) of the fire source are calculated based on the mounting height of the detector, the fire source position can be accurately detected even if the fire source is higher than the monitoring surface, such as on a stage. be able to.

On the other hand, for fires in multiple locations, the positions of multiple fire sources are calculated only from the detection information from the first fire source detector, so the fire source position is calculated using two fire source detectors. This can prevent the problem that the source position cannot be identified.

Note that if a fire occurs in multiple locations, there will be an error in detecting the fire at a location higher than the monitoring surface, but this poses no problem in practice since the probability of fires occurring in multiple locations at the same time is extremely low.

Further, although the above embodiments have been exemplified by a fire source detector that performs mechanical scanning in the horizontal direction and optical scanning in the vertical direction, the present invention is not limited to this. Any suitable detector, whether optical scanning or electrical scanning, can be used as long as it monitors the guarded area by horizontal and vertical scanning.

(Effects of the Invention) As described above, according to the present invention, normally one fire source detector scans and monitors a warning area in the vertical and horizontal directions, and when detecting a fire source, the entire warning area is monitored. Determining the number of fire sources from one scan information, and if the number of fire sources is one, activating a second fire source detector to obtain one scan information for the entire warning area; Calculating the fire source position from the horizontal and vertical scanning angles with respect to the fire source obtained by both the first and second fire source detectors and the mounting height of each fire source detector with respect to the floor surface of the warning area; If the number of fire sources is two or more, the second fire source detector is not activated and the vertical and horizontal scanning angles for the multiple fire sources already obtained by the first fire source detector are In addition, since the fire source position is calculated from the installation height of the first fire source detector relative to the floor of the warning area, two fire source detectors are used to detect a fire in one place that occurs at a higher position than the monitoring surface. The location of the fire source can be determined accurately. On the other hand, in the case of multiple fires, the location of the fire source is calculated only based on the detection information of a single fire source detector, so the location of the fire source can be determined accurately. This solves the problem of not being able to identify the fire source location when calculating the position based on the detected information, and it is possible to detect the fire source location more accurately depending on the situation of the fire.

[Brief explanation of drawings]

Fig. 1 is a block diagram showing an embodiment of the present invention, Fig. 2 is an explanatory drawing showing an example of a fire source detector used in the present invention, and Fig. 3 shows the installation state of the fire source detector. 4 is a flowchart showing the detection operation of the embodiment shown in FIG. 1, FIG. 5 is an explanatory diagram showing the detection operation for one fire source, and FIG. 6 is a flowchart showing the detection operation for two fire sources. , Figures 7 and 8 are explanatory diagrams showing the problems with conventional fire detection at a position higher than the monitoring surface, and Figure 9 is an explanation of fire detection at a position higher than the monitoring surface using two detectors. 10 are explanatory diagrams showing problems when two detectors are used. 10a: first fire source detector, 10b: second fire source detector, 11: base, 12: rotating section, 13: detection section, 14: motor, 15: rotating mirror, 16: vertical detection range, 16a: Instantaneous field of view, 17: Objective lens, 1818: Reflector, 19: Slit, 19
a: Condenser lens, 20: Detection element, 21a, 21
b: Scanning circuit, 22a, 22b: Vertical scanning angle detection circuit, 23a, 23b: Horizontal scanning angle detection circuit, 2
4a, 24b: Monitoring area discrimination circuit, 25: Monitoring area setting circuit, 26a, 26b: 1 scan discrimination circuit, 27: Fire source number discrimination control circuit, 30a, 3
0b: register, 31: OR gate, 32a: first fire source position calculation circuit, 32b: second fire source position calculation circuit.

Claims (1)

[Claims] 1. First and second fire sources that scan a warning area in the horizontal and vertical directions and output scanning information including a horizontal scanning angle and a vertical scanning angle corresponding to the fire source position when detecting the fire source. constantly scanning only the detector and the first fire source detector, and when a fire source detection output is obtained, determining the number of fire sources obtained in one scan over the entire warning area, fire source number determination control means that activates and scans the second fire source detector only when the number of fire sources is one; and the second fire source detector activated by the fire source number determination control means. a first fire source position calculation means for calculating a fire source position based on one scan information covering the entire warning area and the scan information obtained by the first fire source detector; and the fire source number discrimination control. Number of fire sources determined by means is 2
In the above case, based on the horizontal and vertical scanning angles of the fire source position already obtained by the first fire source detector and the installation height of the first fire source detector with respect to the floor surface of the warning area. A fire source position detection device comprising: second fire source position calculation means for calculating the fire source position.