WO2018164344A1 - Fire monitoring system for preventing false alarm of fire detection device - Google Patents

Abstract

The present invention relates to a fire monitoring system and, more particularly, to a fire monitoring system for preventing a fire detection device from erroneously determining that there is a fire and making a false alarm even when there is no actual fire. Provided is a fire monitoring system which consists of a plurality of fire detection devices and an integrated controller connected to the fire detection devices wirelessly or by wire, and is for preventing false alarms of the plurality of fire detection devices. In particular, the plurality of fire detection devices are installed within a space so as to have the same effective monitoring area, and the integrated controller is configured to put execution of a fire alarm on standby for a predetermined time interval (T1-T2) when a first fire detection signal is received from any one of the plurality of fire detection devices, and to execute the fire alarm when a second fire detection signal is received from another fire detection device within the predetermined time.

Description

Fire monitoring system to prevent false alarms of fire detection devices

The present invention relates to a fire monitoring system, and more particularly, to a fire monitoring system for preventing a false alarm by determining that the fire detection device is a fire even when the fire detection device is not a real fire.

In general, when a fire occurs, carbon monoxide, carbon dioxide, and smoke are generated at an early stage of a fire, and then a spark starts to occur. As the fire progresses, there has been a study on the alarm system by effectively measuring carbon monoxide, carbon dioxide and flame.

In the early stages of fire, carbon monoxide increases to more than 1,000 ppm and carbon dioxide increases to tens of thousands of ppm, and the concentrations of carbon monoxide and carbon dioxide are not usually increased.

The fire monitoring system of Korean Patent Laid-Open Publication No. 10-2013-0058244 includes a carbon dioxide detecting sensor array unit comprising a plurality of carbon dioxide detecting sensors and a sensor node unit transmitting a result value measured by the carbon dioxide detecting sensor array unit in order to determine whether a fire exists. And, it receives a result value transmitted through this and consists of a receiver for displaying whether or not a fire occurs in the terminal.

By such a configuration there is an advantage that it is easy to monitor the occurrence of fire early in the fire by detecting the concentration of carbon dioxide increases in the event of fire. However, in order to detect carbon dioxide, a sensor must be installed directly inside a building, and there is a problem that it is not easy to quickly detect a fire in a place where the sensor is not installed.

In addition, the fire detection device of Korean Patent Publication No. 10-1098969 has an ultraviolet light sensor for detecting ultraviolet rays flowing into the fire detection device, an infrared light sensor for detecting infrared rays entering the fire detection device, an ultraviolet light sensor and an infrared light sensor. The pulse signal detected by the amplification unit for amplifying a digital signal; Check whether the wavelength of ultraviolet rays and infrared rays amplified by the amplification part is within the wavelength range recognized as the fire among the fire recognition zones set in the fire judgment DB, and fire judgment that generates a fire signal when included in the preset fire recognition zone. Wealth; An optical sensor for detecting an amount of light flowing into the fire detector; A fire sensitivity control unit is provided to change the reference intensity recognized as a fire among the ultraviolet and infrared fire recognition zones set in the fire judgment DB of the fire judgment unit in association with the amount of light recognized by the optical sensor.

The prior art document has the advantage that it is possible to detect the fire at a long distance by measuring the infrared and ultraviolet wavelengths generated during the fire, but the flame or high heat generated from a flame source such as welding or furnace that can be mistaken as a fire is present. There is still a problem of false alarms in places where sparks inevitably occur during work such as industrial facilities.

However, it is true that there is a great risk of fire in such an environment where sparks are generated to perform work. In 2013, 83% of fires occurred in factories, and 47.7% of them occurred during business hours, according to the 2013 Korea Insurance Insurance Association's special building fire report.

That is, in a work place accompanied by a flame, it means that the probability of actual fire occurrence at work time is very high. In order to prevent fire in such a place, a fire detection device or a flame detection device must be installed. However, due to the false alarm as described above, indirect damage accidents are frequently caused by the operation of automatic fire extinguishing devices such as sprinklers and the power cut off, and greatly reduce the sensitivity of the fire detection device or turn off the power of the fire detection device. Increasingly, there is a growing number of cases, which leads to problems that prevent fires from being put out early in the event of an actual fire.

Therefore, there is a need for a way to reduce the false alarm operation of such a fire detection device.

As described above, an object of the present invention is to provide a fire detection device capable of minimizing a false alarm of a fire detection device due to a flame or high temperature, which is essentially generated in connection with a work in a workplace.

The problem to be solved of the present invention is not limited to the above-mentioned problem. In addition, other technical problems that are not mentioned will be clearly understood by those skilled in the art from the following description.

In order to achieve the above object, according to the first aspect of the present invention, a plurality of fire detection device and the integrated controller wirelessly or wired connected to the fire detection device, fire monitoring for preventing false alarm of the plurality of fire detection devices A system is provided, in which a plurality of fire detection devices are installed in a space to have the same effective monitoring area as each other, and the integrated controller receives a first fire detection signal from a fire detection device of any of the plurality of fire detection devices. If received, it is configured to wait for a fire alarm for a predetermined time interval (T1 ~ T2), and executes a fire alarm when the second fire detection signal is received from another fire detection device within the predetermined time.

In the above-described aspect, the integrated controller is configured not to execute a fire alarm when a second fire detection signal is not received from one or more other fire detection devices within the predetermined time interval T1 to T2.

On the other hand, in the above-described embodiment, the predetermined time is preferably in the range of 3 to 50 seconds.

In addition, in the above-described aspect, when the integrated controller receives the second fire detection signal from the other one or more fire detection devices before the minimum time T1 of the predetermined time intervals T1 to T2, the predetermined time intervals T1 to T2. Wait for a fire alarm to run, and execute a fire alarm if a third fire detection signal is received from another one or more fire detection devices within the predetermined time.

In addition, in the above-described aspect, the integrated controller may be configured not to execute a fire alarm when a third fire detection signal is not received from another one or more fire detection devices within the predetermined time interval T1 to T2.

In addition, in the above-described aspect, the integrated controller may be configured to execute a fire alarm when the second fire detection signal is received from the other one or more fire detection devices before the minimum time T1 of the predetermined time intervals T1 to T2. .

In addition, the present invention provides a fire authenticity determination method for determining the authenticity of the fire based on the fire detection signals from a plurality of fire detection devices installed in the space to have the same effective monitoring area in order to achieve the above object. Way,

A fire detection step of detecting a fire using a plurality of fire detection devices; Receiving a first fire detection signal from any one of the plurality of fire detection devices; Waiting to receive a second fire detection signal from another fire detection device after receiving the first fire detection signal; And executing a fire alarm when the second fire detection signal is received between the predetermined time intervals T1 and T2 or when the second fire detection signal is not received between the predetermined time intervals T1 and T2. Including the step of ignoring the signal and returning to the fire detection step.

According to the present invention, by detecting the fire according to the detection result of the fire detection devices installed in the space to have the same effective monitoring area, it is possible to reduce the false alarm of the fire detection device due to the flame or high heat generated during the operation. .

1 is an explanatory diagram for explaining sensitivity according to an effective sensing distance.

2 is a view showing the appearance of a fire detection apparatus according to the present invention.

3 is a view showing the sensor unit and the LED unit of the fire detection apparatus exposed to the outside according to the present invention.

4 is a view showing a wavelength detection band of the first to third sensors of the sensor unit according to the present invention.

Figure 5 is a block diagram showing the internal configuration of a fire detection apparatus according to the present invention.

6 is a view for explaining the effective monitoring distance setting by the connection of the external sensitivity control switch and the signal receiver in the fire detection apparatus according to the present invention.

7 is an explanatory diagram for explaining a fire monitoring system configured for preventing the false alarm of the fire detection device.

8 is an explanatory diagram for explaining a fire monitoring system using three fire detection devices.

9 is a flowchart illustrating a fire authenticity determination method for determining the authenticity of a fire based on fire detection signals from a plurality of fire detection devices installed in a space to have different monitoring areas.

Advantages and features of the present invention, and methods for achieving them will be apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below but may be implemented in various different forms.

In this specification, the embodiments are provided so that the disclosure of the present invention may be completed and the scope of the present invention may be completely provided to those skilled in the art. And the present invention is only defined by the scope of the claims. Thus, in some embodiments, well known components, well known operations and well known techniques are not described in detail in order to avoid obscuring the present invention.

Like reference numerals refer to like elements throughout. In addition, the terms used (discussed) herein are for the purpose of describing particular embodiments only and are not intended to be limiting of the invention. In this specification, the singular also includes the plural unless specifically stated otherwise in the phrase. In addition, components and operations referred to as 'includes (or includes)' do not exclude the presence or addition of one or more other components and operations.

Unless otherwise defined, all terms (including technical and scientific terms) used in the present specification may be used in a sense that can be commonly understood by those skilled in the art. In addition, the terms defined in the commonly used dictionary are not ideally or excessively interpreted unless they are defined.

Hereinafter, technical features of the present invention will be described in detail with reference to the accompanying drawings. First, the sensitivity according to the distance of the fire detection apparatus will be described with reference to FIG. 1 to help the understanding of the present invention.

In general, a fire detection device or a flame detector tests a valid monitoring distance by introducing a concept of an effective monitoring distance that recognizes two or more detection distances in one detector according to a rule that previously provided only one nominal monitoring distance to one detector. do.

For example, for a fire detection device having three effective monitoring distances (30m, 40m, 50m) as shown in FIG. 1, the type approval and verification test of the fire detection device is 1.2 times the effective monitoring distance or nominal monitoring distance. 330mm × 330mm × 50mm fire plate placed at the distance (36m, 48m, 60m, respectively) of water and haptan in a prescribed ratio and the fire test to detect the ignited flame within 30 seconds, and vice versa A flame that is ignited in the same way on a 16.5 × 16.5 mm × 50 mm plate placed at the same distance must meet all of the malfunction tests that must be withdrawn without detecting more than one minute (i.e. without issuing a fire alarm). .

It is not difficult to satisfy only one of the operation test and the non-operation test in the acceptance test, but it is never easy to satisfy both tests, and the operation test and the non-operation test described above at each effective monitoring distance. It is very difficult to meet the requirements of.

In the present invention, the method of changing the sensitivity is that the infrared energy is increased or decreased in proportion to the square of the distance, the flame generated by igniting the haptan and water in the ignition plate of 330mm × 330mm × 50mm size at the longest 50m distance After 1 minute of ignition, the infrared energy reaching the detector is assumed to be 100, and after the same flame is brought 40 meters away from the detector, 10 meters forward from the 50m test site, the infrared energy reaching the detector is 1.2 times longer. As we get closer, the magnitude of the energy reached increases from 100 to 144. In the same way, the distance reached 1.4 times at 30m distance, increasing to 196.

As described above, since the amount of infrared energy received by the fire detection device increases with distance, the fire detection device is set to a low sensitivity (also referred to as 30m sensitivity) for a close effective monitoring distance (30m). In the case of intermediate effective monitoring distance (40m), it is set to medium sensitivity (also referred to as 40m sensitivity), and in the case of distant effective monitoring distance (50m), it is set to high sensitivity (also referred to as 50m sensitivity) The sensitivity is set to satisfy the requirements of the operation test and the non-operation test as described above at each sensitivity.

2 is a view showing the appearance of the fire detection apparatus 100 according to the present invention. As shown in FIG. 2, the fire detection apparatus 100 includes a case 170 formed to surround and expose the sensor unit 110 for detecting a fire and an LED unit 130 indicating a state of the fire detection apparatus. .

The sensor unit 110 includes a plurality of sensors for detecting a fire, and a central processing unit 120 for controlling the sensitivity of the sensor unit 110 and determining whether there is a fire is housed in the cylindrical case. .

A fire detection sensor unit according to the present invention is provided with a lens (not shown) on one side of the cylindrical body (BODY), the inside of the body is provided with a printed circuit board (PCB) equipped with a sensor and an LED.

3 is a view illustrating the sensor unit 110 as described above in more detail. The sensor unit 110 for detecting a fire according to the present invention includes, but is not limited to, at least three sensors 112, 114, and 116.

A plurality of sensors constituting the sensor unit 110 is a fire element detection sensor for detecting at least one fire-related element, and includes a non-fire element detection sensor for detecting at least one non-fire element.

More specifically, in the embodiment of FIG. 3 employing three sensors, the first sensor 112 is a sensor for detecting CO ₂ and CO resonance energy when a flame (flame) occurs, the second sensor 114 is a flame ( Flame) detects only CO resonance energy, and the remaining third sensor 116 is a sensor configured to detect non-fire elements other than the flame rather than the flame. For example, the third sensor 116 for detecting the non-fire element may be an optical sensor for detecting a wavelength range corresponding to the infrared characteristics exhibited in arc welding, sunlight, halogen lamps, fluorescent lamps, and various colored lamps.

For reference, flames or flames from fire radiate radiant energy. Radiation energy can be expressed by three factors of the Stefan-Boltzmann law.

[Equation]

H = AeσT ⁴

Where H is the radiant energy per hour, A is the surface area, e is the emissivity of the radiant, σ is Stefan Boltzmann's constant, and T is the temperature of the radiant. The radiant energy increases with increasing temperature value of the radiating object. Detecting the resonance energy of carbon dioxide will be described as follows.

In the present invention, as described above, the phenomenon called carbon dioxide resonance radiation present in the infrared rays emitted from the flame is used. Carbon dioxide has two emission spectrum peaks in the near infrared band, and gray emission and carbon dioxide resonance radiation exist, and the present invention uses carbon dioxide resonance radiation rather than gray emission. In addition, the present invention is designed to further utilize the resonance radiation of carbon monoxide in order to further increase the accuracy of fire detection.

The carbon dioxide resonance radiation means that the energy emitted by the carbon dioxide in the excited state is absorbed by other carbon dioxide in the ground state, and the carbon dioxide emitted by the carbon dioxide in the excited state is received by the carbon dioxide in another ground state. It refers to a phenomenon that causes resonance to exchange energy with each other, and carbon dioxide resonance radiation characteristics are different from heat sources such as sunlight, lamps, and heat. Carbon monoxide resonance radiation is also similar to carbon dioxide resonance radiation.

4 is a diagram illustrating sensing wavelength bands of the plurality of sensors 112, 114, and 116 as described above. As shown in FIG. 3, the sensor first sensor 112 that detects CO ₂ and CO resonance energy is a band pass filter for detecting infrared energy (thermal energy) having a wavelength band ranging from approximately 3.8 μm to 5.0 μm. The sensor 114 that detects only CO resonance energy may be a band pass filter for detecting infrared energy having a wavelength band in the range of approximately 4.5 μm to 4.9 μm. Meanwhile, the third sensor 116 for detecting the non-fire element may be a band pass filter for detecting infrared energy having a wavelength band within a range of 3.9 μm to 4.1 μm.

According to such a configuration, for example, if the first sensor 112 and the second sensor 113 for detecting a fire element reacts, and the third sensor 113 for detecting a non-fire element does not react the detection It is considered that a spark or flame is likely to be caused by a fire. Differently, even if the first sensor 112 and the second sensor 113 react, if the third sensor 113 that detects the non-fire element reacts greatly, it may be other than a fire such as arc welding, a lighter or a fire. It can be judged that it is likely to be caused by a factor.

Referring back to FIG. 3, an LED unit is installed on an exposed surface of the fire detection apparatus 100, and the LED unit 130 includes a plurality of LEDs (light emitting diodes) that emit light of different colors. As shown in FIG. 3, the LED unit 130 includes, but is not limited to, the first LED 132 emitting red light and the second LED 134 emitting green light. The LED unit 130 is installed to display the operation state of the fire detection device, which will be described later.

5 is a block diagram schematically showing the configuration of the fire detection apparatus 100 according to the present invention. As shown in Figure 5, the fire detection device 100 according to the present invention, the sensor unit including a plurality of sensors to detect a fire, based on the signal input from the sensor unit 110 to determine whether the fire The central processing unit 120 for determining the state, the LED unit 130 for displaying the state of the sensor unit 110 and whether the fire, the sensitivity control input device 140 for adjusting the sensitivity from the outside and the external network device 250, for example, a Wi-Fi communication module 150 connected with an Access Point (AP).

In the fire detection apparatus 100, the sensor unit 110 including the plurality of sensors 112, 114, and 116 to detect a fire has been described above with reference to FIGS. 3 and 4, and thus description thereof will be provided. Omit it.

The sensor unit 110 including the fire element detection sensors 112 and 114 and the non-fire element detection sensor 116 transmits the detected value in each wavelength band to the signal input unit 122 of the central processing unit (MCU) 120. And the central processing unit (MCU) functions to determine whether a fire is based on the detected values from the respective sensors received.

The central processing unit 120 controls the overall operation of the sensor unit 110, the sensitivity control switch 140, or the signal input unit 122 and the fire detection device 100 configured to receive signals from the short range communication module. And a memory 128 for storing a sensitivity adjustment algorithm used to set the sensitivity of the sensor unit 110 of the fire detection apparatus 100 and a fire discrimination algorithm for determining whether a fire is present.

The signal input unit 122 receives a signal sensed by the sensor unit 110, receives a sensitivity value set by the user through the sensitivity control switch 140, or receives data input from the short range communication module 150. It is configured to deliver this to the control unit 124.

The controller 124 controls or processes signals input from the signal input unit 122. For example, when a flame occurs, when the first to third sensors 112, 114, and 116 of the sensor unit 110 transmit respective detected values to the controller 124, the controller 124 may store the memory 128. Fire discrimination algorithm stored in the) and determines whether the generated flame is caused by fire or non-fire element (welding, lighter fire) and notifies the integrated controller 300 through the signal output unit 126. . The integrated controller 300 will be described in more detail below.

Meanwhile, the fire determination algorithm may include a carbon dioxide-carbon monoxide waveform feature, a carbon monoxide waveform feature, a non-fire element waveform feature, or a combination thereof detected from the first to third sensors 112, 114, and 116 as described with reference to FIG. 4. This is performed by comparing the characteristic (ratio) of the waveform to the waveform characteristic corresponding to the fire stored in the memory and the waveform characteristic corresponding to the non-fire.

For example, the amount detected by the fire factor detection sensor (the first sensor 112 and the second sensor 114) and the amount detected by the non-fire factor detection sensor (the third sensor 116) are compared. If the amount detected from the non-fire factor detection sensor 116 is larger than the amount detected from the fire factor detection sensors 112 and 114 or more than a predetermined amount, the controller 124 indicates that the detected flame is caused by a fire. If not, it may be stored in the memory 128 as a non-fire event.

On the other hand, if the amount detected from the non-fire factor detection sensor 116 is large or less than a predetermined amount compared to the amount detected from the fire factor detection sensors 112 and 114, the controller 124 determines that the detected flame is generated by the fire. And store it in the memory 128 as a fire event, and transmit the fire to the fire station or display through the LED 130.

Next, the sensitivity control switch 140 will be described with reference to FIG. 6. Sensitivity adjustment switch 140 is separated from the body (or case 1700) of the fire detection device 100 shown in FIG. It is installed to be electrically connected.

As shown in FIG. 6, the sensitivity control switch 140 includes three terminals. The first terminal T1 is commonly connected to a negative (−) power supply of a DC level, and the second terminal T2 and the third terminal T3 are connected to a DC sub power source (DC −) to which the first terminal T1 is connected. Is configured to be connected via a switch. In such a configuration, when the second terminal T2 and the third terminal T3 are open to the DC sub power source DC −, the input terminals I1, I2, and the signal input unit 122 of the signal input unit 122 of the central control unit 120 are opened. H, L, and L are respectively input to I3, and the controller performs a sensitivity adjustment algorithm stored in the memory to set the effective monitoring distance to 30 m (the sensitivity of the sensor unit 110 is set to a low degree).

On the other hand, when the second terminal T2 is connected to the DC sub power source DC − and the third terminal T3 is open, the input terminals I1 and I2 of the signal input unit 122 of the central control unit 120 are connected. H, H, and L are respectively input to I3, and the controller performs a sensitivity adjustment algorithm stored in the memory to set the effective monitoring distance to be 40 m (the sensitivity of the sensor unit 110 is set to the middle sensitivity).

In addition, when both the second terminal T2 and the third terminal T3 are connected to the DC sub power source DC-, the input terminals I1, I2, and I3 of the signal input unit 122 of the central control unit 120 are H, H, and H are respectively input, and the controller performs a sensitivity control algorithm stored in the memory to set the effective monitoring distance to 50 m (the sensitivity of the sensor unit 110 is set to high sensitivity).

Therefore, the user can go to the place where the fire monitoring device is installed (approximately 15m to 50m or more from the ground) to adjust the sensitivity of the conventional fire monitoring device, and safely adjust the sensitivity of the fire monitoring device when necessary without operating the fire monitoring device. It becomes possible.

The sensitivity of the fire detection device is controlled by non-fire elements such as welding or lighter by setting it to a low level because it is relatively easy to observe the fire by the worker in case of fire during the day when the operator is resident. The non-fire alarm can be further prevented. On the other hand, at night when there are no workers, the fire detection device is set at high sensitivity, so that flames or sparks caused by fire can be detected more precisely.

In addition, although not shown, the central processing unit may further include a timer unit, and may be configured to automatically change the sensitivity of the fire detection apparatus for each time zone set by the user by the timer unit. For example, a fire detection device can be configured to automatically adjust sensitivity by setting a sensitivity of 30m in the time zone of 9 am to 6 pm and a sensitivity of 50 m in the time zone of 6 pm to 9 am the next day. have.

Referring back to FIG. 5, the signal input unit 122 is configured to further receive a sensitivity adjustment command from the Wi-Fi communication module 150 in addition to the sensitivity adjustment switch 140. The Wi-Fi communication module 150 is configured to perform communication with an external terminal, specifically, a dedicated application installed on a smartphone, through an AP (Access Point) installed on the outside.

Referring back to FIG. 5, the fire detection apparatus 100 according to the present invention is provided with an LED unit 130 that visually displays state information. The LED unit 130 includes, but is not limited to, a first LED 132 emitting red light and a second LED 134 emitting green light. The first LED 132 and the second LED 134 is advantageous for visual distinction of emitting light in different colors, and may be selected from two different colors of red, green, blue, and yellow.

[Table 1] Status information display by LED part

As shown in Table 1, when the fire detection device operates at a sensitivity of 30m, the control unit turns on only the first LED 132 (the second LED 134 turns off) during normal monitoring, and the first LED when the fire is detected. Controls to flash.

On the other hand, when the fire detection device operates at a sensitivity of 40m, during normal monitoring, the control unit controls to display both the first LED 132 and the second LED 134 by lighting and to flash the first LED when detecting the fire.

In addition, when the fire detection device is set to 50m sensitivity, the control unit controls only the second LED 134 lights up during normal monitoring, and the first LED 132 flashes during the fire detection.

Therefore, the fire alarm in case of fire should be informed of the urgent situation, the first LED is preferably selected in the red to visually display the emergency situation, the second LED is preferably selected in blue or green.

According to this configuration, the color and blink state of the LED installed on the exposed surface of the fire detection device allows administrators to easily recognize the fire detection state at which sensitivity the fire detection device is currently operating, and the fire detection state. Can lose.

 In the above-described embodiment, the LED unit 130 has been described as being composed of two LEDs, that is, the first LED 132 and the second LED 134, but the present invention is not limited thereto, and the first LEDs of different colors are different from each other. It consists of the third to third LEDs, each of the three color sensitivity (30m sensitivity, 40m sensitivity, 50m sensitivity) for each color, and in the same manner as in the above-described embodiment to detect only one LED (red) in the event of fire detection It may be implemented.

7 is a view showing an example of a fire monitoring system according to the present invention consisting of a fire detection device 100 having the configuration as described above. As shown in FIG. 7, the fire monitoring system 10 includes a plurality of fire detection devices 100-1 and 100-2 and an integrated controller 300 individually connected to each fire detection device. The connection between the integrated controller 300 and the fire detection apparatuses 100-1 and 100-2 may be wired or wireless. In the case of wireless, the integrated controller 300 may be mounted in a wireless router.

The integrated controller 300 receives the fire detection information through the signal output unit 126 of the plurality of fire detection apparatus 100 as described above. In the example shown in FIG. 7, each of the plurality of fire detection apparatuses 100-1, 100-2 is installed in a space to have the same effective monitoring A1.

In the fire monitoring system configured as described above, when a flame (for example, arc welding by welding) is generated by an operator's work in one of the effective monitoring areas A1, the second fire detection apparatus 100 relatively close to the fire source is generated. -2) detects the flame first and determines whether the fire is true or not by a fire determination algorithm using detection signals from the first to third sensors of the second fire monitoring apparatus as described above.

In most cases, by the inherent fire discrimination algorithm of the fire detection apparatus according to the present invention, it can be determined that the flame by the arc welding is not a fire. However, under unusual conditions, the fire discrimination algorithm of the present invention may misjudge it as a flame caused by fire.

In the present invention, to prevent such a false alarm, the conventional fire monitoring device is directly connected to the fire brigade to notify the fire alarm in the integrated controller 300 and configured to notify the fire brigade through the second decision.

In such a configuration, the second fire detection apparatus 100-2 that detects the flame transmits a fire detection signal to the integrated controller 300. The integrated controller 300 is another fire detection device connected to the integrated controller 300, instead of immediately transmitting the fire detection signal from the second fire detection device 100-2 to the fire station, the first fire detection device Wait for a predetermined time to receive a fire detection signal from (100-1).

As described above, the infrared energy from the flower source is reduced in proportion to the square of the distance. In order to detect the infrared energy from the flame as the fire source in the first fire detection sensor 100-2 as a fire, It is possible only if the energy generated by the fire source (flame) is greater than the sum of the infrared energy which decreases by the square of the distance from the fire source to the second fire detection sensor 100-2.

Therefore, the second fire detection device that detects the first flame, unless the energy generated from the flame generated by arc welding performed in the workplace, etc. is suddenly increased to two to three times (four times if the distance is double). The first fire detection apparatus 100-1 disposed adjacent to 100-2 recognizes the flame by welding as a fire and does not notify the integrated controller 300 of the fire detection signal.

On the other hand, when an actual fire occurs in the monitoring area A1, the infrared energy generated from the fire source is gradually increased as the flame of the fire source increases, that is, over time, so that the neighboring fire from the second fire detection device 100-2 The fire detection device 100-1 detects this and notifies the integrated controller 300 of the fire detection signal.

That is, after receiving the fire detection signal from the second fire detection device 100-2, the integrated controller 300 waits for the transmission of the fire alarm signal to the fire station for a predetermined time and detects another fire for the predetermined time. If the fire detection signal is not received from the device 100-1, it is determined that the flame is generally generated in the workplace, and thus the fire detection signal received from the second fire detection device 100-2 is ignored. When a fire detection signal is received from the other fire detection device 100-1 for a predetermined time, it is determined that the fire is generated and a fire alarm signal is generated in the fire station.

Meanwhile, the predetermined time may be selected as an appropriate time condition in consideration of the sensitivity of the fire detection devices 100-1 and 2 installed in the workplace and / or the installation distance between the fire detection devices. However, preferably the predetermined time of waiting for the fire detection signal of the other fire detection device in the integrated controller is preferably selected in the range of approximately 3 seconds to 50 seconds, more preferably in the range of 5 to 30 seconds.

In FIG. 7, two fire monitoring apparatuses have been described as an example, but the present invention is not limited thereto. As illustrated in FIG. 8, three fire detection apparatuses 100-1 to 100 to 3 are located within the same fire monitoring region. It may be configured as a fire monitoring system having a.

In the fire monitoring system having such a configuration, for example, as illustrated in FIG. 8, the flower garden (flame or fire) is an area between the third fire detection device 100-3 and the second fire detection 100-2. , The second fire detection device and the third fire detection device notify the integrated controller first at the second fire detection device with a slight time difference, and then the third fire detection device. The fire detection signal will be sent to the integrated controller (300).

In this case, the integrated controller 300 first receives the image detection signal from the second fire detection device and receives the fire detection signal from the third fire detection device within a time range of, for example, within 5 seconds earlier than a predetermined time. In this case, the integrated controller 300 may be configured to determine that it is a real fire only when receiving a fire detection signal from any one or more of the other fire detection devices.

That is, in the embodiment of FIG. 8, even when a fire detection signal is received from the second fire source detection device and the third fire source detection device almost simultaneously, the fire detection signal is received from another fire detection device (the first fire detection device). It can also be set to judge the fire only.

Such a method makes it possible to distinguish the authenticity of the flower garden more accurately when the flower garden occurs at the boundary of the area to be monitored.

9 is a flowchart illustrating an operation flow in an integrated controller for preventing false alarm according to the present invention for determining the authenticity of a flower source as described with reference to FIGS. 7 and 8.

As shown in Fig. 9, the integrated controller monitors the fire source or the fire occurrence as in step S100 while being connected to a plurality of flame detection devices installed in the space to have the same effective monitoring area.

In step S110, when a fire or a fire source occurs due to an operation or a fire, the fire detection device (hereinafter referred to as the first fire detection device) that detects this sends a fire detection signal to the integrated controller so that the integrated controller receives the first fire detection signal. do.

Upon receiving the first fire detection signal from the first fire detection device, the process proceeds to step S120, in which the integrated controller waits for a fire alarm and enters a fire determination mode for determining the authenticity of the fire.

Subsequently, in step S130, the integrated controller determines whether a second fire detection signal is received from another fire detection device for a predetermined time range T1 to T2.

If the second fire detection signal is not received from the other fire detection device within the predetermined time range in step S130 (that is, T> T2), the step proceeds to S160 and S170 to release the fire plane mode and reset to step S100. Will return.

However, if the second fire detection signal is received in step S130 and the reception time T is between T1 and T2, which is a predetermined time range, it is determined that the flame has increased due to the fire, and the flow proceeds to step S180 to provide a fire alarm. By the announcement, it is possible to more accurately determine the authenticity of the fire source generated in the workplace, thereby preventing the damage caused by the false alarm of the fire detection device.

On the other hand, if the second fire detection signal is received in step S130 and the reception time T is less than the minimum value of the predetermined time range T1 (T <T1), the position of the flower source is the first surveillance region and the second surveillance. It is likely to occur between the regions. Therefore, in this case, by repeating the operations of steps S130, S150, S180, S160, and S170, that is, the authenticity of the fire source is determined according to whether a fire detection signal from another fire detector is received between the time T1 and the time T2. It can be further configured to.

However, this additional step is according to the user's selection, and may be configured to notify the fire alarm by determining that it is a fire when the reception time T of the second fire detection signal is received before T1 which is the minimum value of the predetermined time range. .

Such an additional configuration may, depending on the environment of the workplace in which the fire monitoring system is installed, e.g. a configuration in which a third fire detection signal is awaited, in which case, for example, arc welding is mainly performed and no flammable or explosive materials are handled. It is preferable that a place where material or flammable material is mainly handled so that a fire can be greatly ignited from an early stage is configured to immediately issue a fire alarm without waiting for reception of a third fire detection signal.

The above description is merely illustrative of the technical idea of the present invention, and those skilled in the art to which the present invention pertains may make various modifications and changes without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are not for limiting the technical spirit of the present invention but for the description, and the scope of the technical idea of the present invention is not limited by these embodiments.

Therefore, the protection scope of the present invention should be construed by the claims below, rather than being limited by the above-described embodiment, and all technical ideas within the equivalent scope will be construed as being included in the scope of the present invention.

Claims (4)

1. A fire monitoring system comprising an integrated controller wirelessly or wiredly connected to each of a plurality of fire detection devices and a plurality of fire detection devices, and prevents false alarms based on fire detection signals from each of the plurality of fire detection devices.

   The plurality of fire detection devices are installed in the same space to have the same effective monitoring area, and each of the plurality of fire detection devices includes a fire element detection sensor for detecting at least one fire related element and at least one non-fire element. Non-fire element detection sensor for detecting and based on the results of the fire element detection sensor and the non-fire element detection sensor includes a control unit for primarily determining whether a fire and transmit the determined fire detection signal to the integrated controller,

   The integrated controller,

   When the first fire detection signal is received from any one of the plurality of fire detection devices, the fire alarm is executed for a predetermined time interval T1 to T2,

   If a second fire detection signal is received from the other fire detection device within the predetermined time T1 <T <T2, a fire alarm is executed;

   If a second fire detection signal is not received from another one or more fire detection devices within the predetermined time interval T1 <T <T2, the fire alarm is not executed.

   When the second fire detection signal is received from the other one or more fire detection devices before the minimum time T1 of the predetermined time intervals T1 to T2, the execution of the fire alarm is waited for the predetermined time intervals T1 to T2, and If a third fire detection signal is received from another one or more fire detection devices within a predetermined time period, whether the fire is secondary based on a plurality of fire detection signals respectively received from the plurality of fire detection devices to trigger a fire alarm. Fire monitoring system, characterized in that it is configured to determine.
2. The method of claim 1,

   And said predetermined time is in the range of 3 to 50 seconds.
3. The method of claim 1,

   Wherein said integrated controller is configured to not execute a fire alarm if a third fire detection signal is not received from another one or more fire detection devices within said predetermined time interval (T1-T2).
4. The method of claim 1,

   The integrated controller is configured to execute a fire alarm when a second fire detection signal is received from at least one other fire detection device before a minimum time T1 of a predetermined time interval T1 to T2. .

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