KR101817730B1 - Fire detection device having a plurality of sensor groups for preventing false alarm - Google Patents

Abstract

The present invention relates to a flame detecting device and, specifically, to a fire detecting device having multiple sensor groups to reduce probability of a false alarm. According to the present invention, a sensor unit includes a first sensor group and a second sensor group. A central processing unit includes: a signal input unit in which a sensor signal sensed by the first sensor group and the second sensor group is individually inputted; a control unit determining whether or not a fire breaks out based on the sensor signal which is inputted; and a memory in which a fire determination algorithm is stored. The central processing unit operates to perform a fire determination mode verifying whether or not the fire breaks out based on second fire determination data received from one among the first sensor group and the second sensor group in a case that it is determined that first fire determination data received from the other corresponds to the fire.

Description

FIRE DETECTION DEVICE HAVING A PLURALITY OF SENSOR GROUPS FOR PREVENTING FALSE ALARM FIELD OF THE INVENTION [0001]

FIELD OF THE INVENTION The present invention relates to a flame sensing apparatus, and more particularly, to a fire sensing apparatus having a plurality of sensor groups for reducing the erroneous detection probability.

Generally, when a fire occurs, carbon monoxide, carbon dioxide and smoke are generated at the beginning of the fire, and then the flame starts to appear. There have been studies on the alarm system by effectively measuring carbon monoxide, carbon dioxide and flame in accordance with the progress of the fire.

At the beginning of the fire, carbon monoxide is increased by more than 1,000 ppm and carbon dioxide is increased by tens of thousands of ppm. In most cases, the concentration of carbon monoxide and carbon dioxide does not increase.

In order to determine whether or not a fire has occurred, the fire monitoring system disclosed in Japanese Patent Application Laid-Open No. 10-2013-0058244 includes a carbon dioxide sensor array unit including a plurality of carbon dioxide sensors, a sensor node unit for transmitting the measured values from the carbon dioxide sensor array unit, And a receiving unit for receiving the transmitted result value and indicating whether a fire has occurred in the terminal.

With this configuration, there is an advantage that it is possible to easily monitor the occurrence of fire in the early stage of fire by sensing the concentration of carbon dioxide which increases during a fire. However, in order to detect carbon dioxide, the sensor must be installed directly inside the building, and in a place where no sensor is installed, it is not easy to detect quickly when a fire occurs.

In addition, the fire detection apparatus of Patent Publication No. 10-1098969 includes an ultraviolet ray sensor for detecting ultraviolet rays entering the fire detection apparatus, an infrared ray sensor for detecting infrared rays entering the fire detection apparatus, an ultraviolet ray sensor and an infrared ray sensor An amplifying unit for amplifying the pulse signal sensed by the amplifying unit to a digital signal; It is checked whether the wavelengths of the ultraviolet rays and infrared rays amplified by the amplification unit are included in the wavelength range recognized as a fire in the fire recognition area set in the fire judgment DB, Wealth; An optical sensor for detecting the amount of light entering the fire detector; And a fire sensitivity adjusting unit for changing a reference intensity recognized as a fire in a fire recognition area of an ultraviolet ray and an infrared ray set in the fire judgment DB of the fire judgment unit in conjunction with the light amount recognized by the optical sensor.

The prior art document has an advantage that fire can be detected even at a long distance by measuring infrared and ultraviolet rays generated in a fire. However, there is a problem that fire or high temperature generated from a flame source such as welding or blast furnace, There is still a problem of false alarms in a place where an unavoidable flame is generated in the work such as an industrial facility.

However, it is true that there is a great risk of fire in an environment where fireworks are generated for performing tasks. According to the report of the Special Fire Fighting Investigation Report of the Non-Life Insurance Association in 2013, it is reported that 83% of the fires occur at factories and 47.7% of them occur during business hours.

In other words, it means that the probability of occurrence of real fire in business hours is very high in a workplace accompanied by such a flame. In order to prevent a fire in such a place, a fire detection device or a flame detection device must be installed. However, due to the above-mentioned false alarms, indirect damages accidents occur frequently due to the operation of the automatic fire extinguishing device such as a sprinkler and the power cut-off, and it is possible to significantly reduce the sensitivity of the fire detection device, There is an increasing number of cases where the fire is turned off, which causes a problem that the fire can not be suppressed at the initial stage in case of actual fire.

Therefore, there is a need for a method for reducing the false alarm operation of the fire detection apparatus.

The present invention aims at providing a fire detection device capable of minimizing false alarms of a fire detection device due to sparks or high temperature which are essentially generated in the workplace as described above.

The problems to be solved by the present invention are not limited to the above-mentioned problems. It is to be understood that the present invention may be embodied in many other specific forms without departing from the spirit or scope of the invention.

According to an aspect of the present invention, there is provided a fire detection apparatus including a sensor unit for detecting a fire and a central processing unit for detecting a fire based on a detection signal from the sensor unit, The sensor unit of the apparatus includes a first sensor group and a second sensor group, and the central processing unit includes: a signal input unit into which sensor signals sensed from the first sensor group and the second sensor group are respectively input; A control unit for determining whether a fire is present based on the input sensor signal; And a memory for storing a fire identification algorithm. When the central processing unit determines that the first fire identification data received from any one of the first sensor group and the second sensor group corresponds to a fire, And to execute a fire authenticity discrimination mode for verifying whether or not the fire is based on the second fire discrimination data received from the group.

The first sensor group and the second sensor group in the above-described embodiment each include a fire factor detecting sensor for detecting a fire factor and a non-fire element detecting sensor for detecting a non-fire element, Group and the second sensor group.

The fire factor detection sensor includes a first sensor for sensing the resonance energy of carbon dioxide and a second sensor for sensing the resonance energy of carbon monoxide, and the non-fire element detection sensor may be an arc welding, a solar lamp, a halogen lamp, And a third sensor for detecting a wavelength corresponding to the infrared characteristic exhibited by the lamp and various colored lamps.

Further, the control unit is configured to apply the same fire determination algorithm to the data acquired from any one of the sensor groups that first detected the fire and the data acquired by the other sensor group used to verify the fire.

In addition, the control unit may be configured to apply different fire detection algorithms to the data acquired from any one of the sensor groups that detected the fire first and the data acquired to the other sensor group used to verify the fire.

The first sensor is a band-pass filter for detecting infrared energy having a wavelength band in the range of 3.8 탆 to 5.0 탆, and the second sensor is a band-pass filter for detecting infrared energy having a wavelength band in the range of 4.5 탆 to 4.9 탆. And the third sensor is a band-pass filter for detecting infrared energy having a wavelength band in the range of 3.9 mu m to 4.1 mu m.

According to the present invention, it is possible to greatly reduce the false detection probability in the fire detection device by judging whether or not the fire is authentic based on the detection results of the plurality of sensor groups operating separately.

1 is an explanatory diagram for explaining sensitivity according to an effective sensing distance;
2 is a view showing an appearance of a fire detection device according to the present invention.
3 is a view showing a plurality of sensor groups and LED units of a fire detection device exposed to the outside according to the present invention.
4 is a view showing a wavelength detection band of the first sensor to the third sensor of the sensor unit according to the present invention.
5 is a block diagram showing an internal configuration of a fire detection apparatus according to the present invention.
FIG. 6 is a view for explaining an effective monitoring distance setting by connecting an external sensitivity adjusting switch and a signal receiving unit in the fire detection apparatus according to the present invention. FIG.
7 is a flowchart illustrating a fire authenticity determination method for determining whether a fire is true or false based on a fire detection signal from a plurality of sensor groups of a fire detection apparatus.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention, and how to accomplish them, will become apparent by reference to the embodiments described in detail below with reference to the accompanying drawings. However, the present invention is not limited to the embodiments described below, but may be embodied in various forms.

The present embodiments are provided so that the disclosure of the present invention is thoroughly disclosed and that those skilled in the art will fully understand the scope of the present invention. And the present invention is only defined by the scope of the claims. Accordingly, in some embodiments, well known components, well known operations, and well-known techniques are not specifically described to avoid an undesirable interpretation of the present invention.

Like reference numerals refer to like elements throughout the specification. Moreover, terms used herein (to be referred to) are intended to illustrate embodiments and are not intended to limit the invention. In the present specification, the singular form includes plural forms unless otherwise specified in the specification. Also, components and acts referred to as " comprising (or comprising) " do not exclude the presence or addition of one or more other components and operations.

Unless defined otherwise, all terms (including technical and scientific terms) used herein may be used in a sense commonly understood by one of ordinary skill in the art to which this invention belongs. Also, commonly used predefined terms are not ideally or excessively interpreted unless they are defined.

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

Generally, the fire detection device or flame detector adopts the convention that one nominal monitoring distance is given to the conventional one detector, and the effective monitoring distance concept which recognizes two or more plural detection distances to one detector is adopted, do.

For example, in the case of a fire detection device having three effective monitoring distances (30 m, 40 m, 50 m) as shown in FIG. 1, the type approval and verification test of the fire detection device is performed at an effective monitoring distance or 1.2 times The operation test in which the flame is poured into the flame of 330 mm x 330 mm x 50 mm placed in the distance (36 m, 48 m, and 60 m, respectively) and the flame of water and hutch is ignited within 30 seconds and a fire alarm is issued For flames ignited in the same way on a 16.5 × 16.5 mm × 50 mm fire plate placed at the same distance, the flame must meet all of the side-action tests that should not be detected for more than one minute (ie, without having to issue a fire alarm) .

It is not difficult to satisfy either one of the operation test and the sub-operation test in the approval test, but it is not easy to satisfy both of the tests. In addition, the operation test and the sub- It is very difficult to satisfy the requirements of

The method of changing the sensitivity in the present invention is a method of changing the sensitivity of infrared rays using a method in which the infrared energy is increased or decreased in proportion to the square of the distance and the generated flame is generated by injecting heptane and water into a plate of 330 mm x 330 mm x 50 mm at a distance of 50 m, After one minute passed, the infrared energy arriving at the detector is assumed to be 100, and after the same flame is advanced 10 meters forward from the detector at 40 m, or 50 m, the infrared energy reaching the detector is 1.2 times The size of the arriving energy increases from 100 to 144 with the same principle, and the magnitude of the arriving energy increases to 196 as the distance approaches 1.4 times at 30 m distance.

As described above, since the size of infrared energy received by the fire sensing apparatus increases with distance, the fire sensing apparatus is set to a low sensitivity (also referred to as 30 m sensitivity) in the case of a near effective monitoring distance (30 m) (Also referred to as a sensitivity of 40 m) in the case of an intermediate effective monitoring distance (40 m) and a high sensitivity (also referred to as 50 m sensitivity) in the case of a far effective monitoring distance of 50 m Are set so as to satisfy the requirements of the operation test as described above and the requirements of the non-operation test at the respective sensitivities.

2 is a view showing the appearance of a fire sensing apparatus 100 according to the present invention. 2, the fire sensing apparatus 100 includes a sensor unit 110 for sensing a fire and a case 170 formed to surround the LED unit 130 to expose the state of the fire sensing apparatus .

The sensor unit 110 includes a plurality of sensors for detecting fire, and a central processing unit 120 for controlling the sensitivity of the sensor unit 110 and determining whether or not a fire is present is housed in a cylindrical case .

A fire detection sensor unit according to the present invention includes a cylindrical body BODY, a lens (not shown) on one side thereof, and a printed circuit board (PCB) on which a sensor and an LED are mounted.

3 is a view showing the sensor unit 110 as described above in more detail. The sensor unit 110 for fire detection according to the present invention includes at least five sensors 112a, 112b, 114a, 114b, and 116, although not limited thereto.

Preferably, the sensor unit 110 includes the first sensor group 110a and the second sensor group 110b. Each of the sensor groups 110a and 110b includes a fire element detection sensor 112a, 112b, 114a and 114b for sensing at least one fire related element, a non-fire element detection sensor 116 for sensing at least one non- ), And the non-fire element detecting sensor 116 is shared with the first sensor group and the second sensor group.

More specifically, the first sensors 112a and 112b used as fire element detection sensors are sensors for detecting CO ₂ and CO resonance energy when a flame (flame) is generated, and a second sensor 114a and 114b are sensors that sense only CO resonance energy when a flame (flame) is generated, and the remaining third sensor 116 is a sensor configured to detect non-fire elements other than flame rather than flame. For example, the third sensor 116 for sensing the non-fire element may be an optical sensor for sensing a wavelength range corresponding to infrared characteristics exhibited in arc welding, solar light, halogen lamp, fluorescent lamp, and various colored lamps.

For reference, a fire or flame from a fire emits radiant energy. Radiation energy can be expressed by three factors of Stefan-Boltzmann law.

[Equation]

H = Ae? T ⁴

Where H is the radiant energy per hour, A is the surface area, e is the emissivity of the radiator, sigma is the constant of Stephan Boltzmann and T is the temperature of the radiator. The radiant energy increases with the temperature value of the copying object. The detection of 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 existing in the infrared ray emitted from the flame is utilized. Carbon dioxide exhibits two emission spectrum peaks in the near-infrared band, with gray emission and carbon dioxide resonance emission, and in the present invention carbon dioxide resonance emission is used rather than gray emission. To further increase the precision of fire detection, the present invention is designed to further utilize the resonant emission of carbon monoxide.

The carbon dioxide resonance radiation means that the energy released by the carbon dioxide in the excited state is absorbed by other carbon dioxide in the ground state, and the energy released by the carbon dioxide in the excited state is absorbed by the other base carbon dioxide, And the resonance characteristics of carbon dioxide are different from those of heat sources such as sunlight, lamp, and heat. Carbon monoxide resonance radiation is also similar to carbon dioxide resonance radiation.

FIG. 4 is a diagram showing the detection wavelength bands of the plurality of sensors 112a, 112b, 114a, 114b, and 116 as described above. As shown in FIG. 3, the first sensors 112a and 112b for sensing CO ₂ and CO resonance energy are band-pass sensors (infrared sensors) for detecting infrared energy (thermal energy) having a wavelength band ranging from about 3.8 μm to 5.0 μm Filter, and the second sensors 114a and 114b that detect only the CO resonance energy may be band-pass filters for detecting infrared energy having a wavelength band within a range of about 4.5 mu m to 4.9 mu m. On the other hand, the third sensor 116 for detecting the non-fire element may be a band-pass filter for detecting infrared energy having a wavelength band in the range of 3.9 mu m to 4.1 mu m.

According to such a configuration, for example, in the first and second sensor groups 110a and 110b, the first sensors 112a and 112b for detecting a fire element and the second sensors 114a and 114b react, If the third sensor 116 detecting the non-fire element does not respond, the detected flame or flame is likely to be generated by fire. Alternatively, even if the first sensor 112a, 112b and the second sensor 114a, 114b react, if the third sensor 116 sensing the non-fire element reacts significantly above a predetermined reference value, Welding, and other factors other than fire, such as a lighter fire.

In the present invention, as described above, a fire element detection sensor for detecting a fire element and a non-fire element detection sensor for detecting a non-fire element are configured to minimize fire false alarm caused by non-fire elements.

However, in spite of such a configuration, a fire false alarm occurs at a very low probability, and it is necessary to further reduce the incidence of such false fire alarm. In the present invention, a plurality of sensor groups (110a, 110b) Is the reason for adopting.

Referring again to FIG. 3, an LED unit is provided on the exposed surface of the fire sensing apparatus 100, and the LED unit 130 includes a plurality of LEDs (light emitting diodes) emitting light of different colors. As shown in FIG. 3, the LED unit 130 includes a first LED 132 emitting red light and a second LED 134 emitting green light, in this embodiment, although not limited thereto. The LED unit 130 is provided to indicate an operation state of the fire sensing apparatus, which will be described later.

5 is a block diagram schematically showing a configuration of a fire sensing apparatus 100 according to the present invention. 5, the fire sensing apparatus 100 according to the present invention includes a sensor unit 110 including a plurality of sensor groups 110a and 110b to detect a fire, An LED unit 130 for indicating whether the sensor unit 110 is in a fire state or not, a sensitivity control input unit 140 for controlling the sensitivity from the outside, And a local area communication module 150 for local communication with an external device.

In the fire detection apparatus 100, the sensor unit 110 including a plurality of groups 110a and 110b for detecting a fire will be described.

The first sensor group 110a is composed of fire element detection sensors 112a and 114a and a non-fire element detection sensor 116. Each of the sensors 112a, 114a, Band to the signal input unit 122 of the central processing unit (MCU) 120, and the central processing unit (MCU) sends a detection value from each sensor received from the first sensor group 110a And determines whether or not the fire is based on the value.

The second sensor group 110b includes the fire element detection sensors 112b and 114b and the non-fire element detection sensor 116 in the same manner as the first sensor group 110a, and the respective sensors 112b, 114b, 116 transmit the sensed values in the respective wavelength bands to the signal input unit 122 of the central processing unit (MCU) 120 and the central processing unit (MCU) Based on the sensed values from the sensors of the vehicle.

Although the first sensor group 110a and the second sensor group 110b commonly use the non-fire element detection sensor 116 in the present invention, the present invention is not limited to this, and a separate non-fire element The detection sensors may be provided independently.

The central processing unit 120 includes a sensor unit 110, a sensitivity adjustment switch 140 or a signal input unit 122 configured to receive a signal from the local communication module, And a memory 128 for storing a sensitivity adjustment algorithm used for setting the sensitivity of the sensor unit 110 of the fire sensing apparatus 100 and a fire determination algorithm for determining whether a fire is present.

The signal input unit 122 receives a signal sensed by the sensor unit 110 or receives a sensitivity value set by the user through the sensitivity adjustment switch 140 or receives data input from the short range communication module 150 And transmits it to the control unit 124.

The control unit 124 controls or processes the signals input from the signal input unit 122. For example, when a flame occurs, the first to third sensors 112, 114, and 116 of the sensor unit 110 transmit the sensed values to the control unit 124, And determines whether the generated flame is caused by a fire or a non-fire element (welding, lighter fire), and notifies the outside through the signal output unit 126. [

The fire identification algorithm identifies the characteristics (ratios) of the carbon dioxide-carbon monoxide waveform feature, the carbon monoxide waveform feature, the non-fire element waveform feature, or the combined waveform thereof detected from the fire element sensor and the non- And comparing the waveform characteristics corresponding to the case with the corresponding waveform characteristics.

For example, the amount detected by the fire factor detecting sensor is compared with the amount detected by the non-fire factor detecting sensor, and the amount detected by the non-fire factor detecting sensor is compared with the amount detected by the fire factor detecting sensors 112 and 114 The control unit 124 determines that the detected flame is not generated by the fire, and may store the detected flame in the memory 128 as a non-fire event. On the other hand, if the amount detected from the non-fire factor detecting sensor is larger than the amount detected by the fire factor detecting sensor or is less than a predetermined amount, the controller 124 determines that the detected flame is generated by the fire, In the memory 128, and to transmit and display the fact of the fire to the fire alarm receiver or through the LED 130. [

In the case of a fire detection apparatus including a single sensor group, the control unit 124 receives data values from each of the sensors every 50 ms and stores them in a memory, collects 10 data values acquired every 50 ms, It is generated every 500ms (0.5 second) and it is judged whether it is fire based on this. In order to lower the probability of erroneous detection, if the fire discrimination data in the unit of 500 ms indicates that the fire is consecutively 5 times, it is judged that it is the fire finally and the fire alarm is generated. In this case, in order to reduce false detection, it is possible to consider increasing the number of consecutive occurrences of fire discrimination data in 500 ms increments from 5 to 7. However, in this case, the fire discrimination time increases from 2.5 seconds to 3.5 seconds, The original purpose of the fire detection device which must be discriminated is lost.

In the present invention, in order to further reduce the probability of false detection within the same time, the controller 124 is designed to have a plurality of sensor groups, and the control unit 124 reads out, for example, data from the first sensor group 110a and the second sensor group 110b, For each 50 ms, stores them in the memory, and generates fire discrimination data in units of 500 ms.

The control unit 124 determines whether or not the fire is generated on the basis of the fire discrimination data in units of 500 ms from the first sensor group and the second sensor group. The control unit determines that the fire identification data generated based on the sensing value acquired from the other sensor group is a fire for a predetermined number of times successively indicating that the fire is generated by the predetermined number of times Lt; / RTI > Here, the predetermined number of times may be different from each other or may be the same.

According to the present invention, the control unit 124 applies a different fire identification algorithm to the data acquired from any one of the sensor groups that detected the first fire and the data from the other sensor group used for the verification, It can be used to judge authenticity.

Next, the sensitivity adjustment switch 140 will be described with reference to FIG. The sensitivity adjustment switch 140 is disposed to be separated from the body (or the case 1700) of the fire sensing apparatus 100 shown in FIG. 2 so as to facilitate access by an administrator and, if necessary, And are electrically connected to each other.

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

On the other hand, when the second terminal T2 is connected to the DC 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 H, and L are input to I3 and I3, respectively, and the controller performs a sensitivity adjustment algorithm stored in the memory to set the effective monitoring distance to 40 m (the sensitivity of the sensor unit 110 is set to medium sensitivity).

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

Therefore, in order to adjust the sensitivity of the conventional fire monitoring device, the user moves to the place where the fire monitoring device is installed (approximately 15m to 50m or more from the ground) so as to safely control the sensitivity of the fire monitoring device .

The sensitivity of the fire detection system is relatively easy to observe by the operator during the day when the worker resides in a lot of days. It is possible to further prevent a non-fire alarm from being generated. On the other hand, in the case of a night without a worker, by setting the fire detection apparatus to a high sensitivity, it is possible to more accurately detect a flame or flame caused by a fire.

Also, although not shown, the central processing unit may further include a timer unit, and the timer unit may be configured to automatically change the sensitivity of the fire sensing apparatus by the time zone set by the user. For example, a sensitivity of 30 m may be set in the time zone from 9:00 am to 6:00 pm, and a sensitivity of 50 m may be set in the time zone from 6:00 pm to 9:00 am the next day so that the fire detection apparatus can automatically adjust the sensitivity have.

Referring again to FIG. 5, the signal input unit 122 is further configured to receive a sensitivity adjustment command from the local communication module 150 in addition to the sensitivity adjustment switch 140. It is apparent to those skilled in the art that the communication module 150 may be a local area communication module, preferably a Bluetooth 4.0-based communication module 150, but is not limited thereto.

In the following description, the Bluetooth 4.0 communication module will be described as an example. Bluetooth refers to a communication standard that allows data to be transmitted and received using a frequency of 2.4 GHz band on a short distance of about 10 m to 100 m. Such a communication standard may be used to handle crosstalk occurring when the same frequency is used, It includes the specifications agreed for identification. The short range communication module or Bluetooth receiver 150 performs with the corresponding Bluetooth transmitter of the mobile terminal 200. Specifically, the Bluetooth receiver 150 installed in the fire sensing apparatus 100 receives a control signal transmitted from a Bluetooth transmitter on the terminal 200 side, for example, a sensitivity control signal and a fire detector reset signal.

Also, although the short-range communication module 150 provided in the fire sensing apparatus has been described as a Bluetooth receiver in the above-described embodiment, the present invention is not limited to this and may be a two-way Bluetooth communication module 150 capable of transmitting / receiving Bluetooth. In this case, if the fire detection device detects a fire, the control unit may notify the fire alarm to the Bluetooth communication module of the manager terminal 200 by a Bluetooth method.

The Bluetooth transmitter and Bluetooth receiver 150 of the present invention conform to the Bluetooth Low Energy standard. The Bluetooth low energy standard has a relatively small duty cycle and can be produced at a low cost as compared with the Bluetooth standard, and the power consumption through the low data rate can be greatly reduced. The Bluetooth low energy standard can be implemented in two modes: dual mode and single mode. The dual mode is a mode in which existing Bluetooth and low-energy technology coexist, and is mainly used for a mobile terminal such as a mobile phone. A single mode is used for a stand-alone product such as a sensor, and a protocol structure is the same as a dual mode. The Bluetooth low energy standard of the Bluetooth transmitter and the Bluetooth receiver of the present invention can be implemented in either the dual mode or the single mode described above.

The terminal 200 may be a conventional mobile phone such as a cellular phone, a personal communication service (PCS) phone, a GSM phone, a CDMA-2000 phone or a WCDMA phone, a portable multimedia player (PMP), a personal digital assistant An installable smart phone, or an MBS (Mobile Broadcast System) phone.

Referring again to FIG. 5, the fire sensing apparatus 100 according to the present invention is provided with an LED unit 130 for visually displaying status information. The LED unit 130 includes a first LED 132 emitting light in red, and a second LED 134 emitting light in green, although not limited thereto. The first LED 132 and the second LED 134 are advantageous for visual distinction to emit light of different colors and can be selected from two different colors of red, green, blue, and yellow.

[Table 1] Status information display by LED

As shown in Table 1, when the fire sensing apparatus operates at a sensitivity of 30 m, only the first LED 132 is turned on (the second LED 134 is turned off) during normal monitoring, and when the fire is detected, .

Meanwhile, when the fire detector operates at a sensitivity of 40 m, the controller illuminates and displays the first LED 132 and the second LED 134 during normal monitoring, and controls the first LED to blink when a fire is detected.

Also, when the fire sensing apparatus is set to a sensitivity of 50 m, only the second LED 134 lights up during normal monitoring, and the first LED 132 flashes when a fire is detected.

Therefore, it is preferable to select the first LED as a red color that visually displays an emergency situation, and the second LED as a blue or green color.

According to such a configuration, the color of the LED and the flashing state of the LED installed on the exposed surface of the fire detection apparatus can be easily recognized by the manager whether the fire detection apparatus is currently operating at the sensitivity and the fire detection state Can be.

Although the LED unit 130 is described as being composed of two LEDs, that is, the first LED 132 and the second LED 134 in the above-described embodiment, the present invention is not limited thereto, (30 m sensitivity, 40 m sensitivity, and 50 m sensitivity) for each color, and only one LED (red) blinks when a fire is detected in the same manner as in the above embodiment .

7 is a view schematically showing a fire detection method in a fire detection apparatus having a plurality of sensor groups. As shown in the drawing, according to the present invention, in step S100, the fire detection apparatus monitors a flower source using a plurality of sensor groups.

In step S110, when the fire detection device receives the fire detection signal acquired from any one of the first sensor group and the second sensor group, the process proceeds to step S120 to determine whether or not the fire occurred.

In step S120, the control unit of the fire detection apparatus determines whether the fire detection signal has reached a predetermined first reference value (four times here) based on the fire determination data received from any one of the sensor groups that transmitted the first fire detection signal If it is determined that the number of times is four or more, which is the first reference value, the flow advances to step S130. At this time, if the continuously generated fire detection signal is less than the reference value 4 times, the step returns to S100.

If the detected fire detection signal from any of the sensor groups is equal to or greater than the first reference value in step S120, the controller proceeds to step S130 and determines whether the fire is authentic. The control unit analyzes the detection data of the sensor group different from the sensor group that issued the fire detection signal in step S140 and determines in step S150 that the fire detection signal is continuously detected based on the data detection value from the other sensor group, It is determined whether or not a reference value (here, five times) has occurred.

As a result of the determination in step S150, if the fire detection signal has been issued more than the second reference value based on the data from the other sensor group, the controller generates the actual fire alarm. Otherwise, the data processing is reset and the process returns to step S100.

According to the present invention as described above, it is possible to obtain an operational effect that the authenticity of fire occurrence can be more accurately determined within the same time.

The foregoing description is merely illustrative of the technical idea of the present invention and various changes and modifications may be made without departing from the essential characteristics of the present invention by those skilled in the art. Therefore, the embodiments disclosed in the present invention are for illustrative purposes only and are not intended to limit the scope of the present invention, and the scope of the present invention is not limited by these embodiments.

Therefore, the scope of the present invention should be construed as being covered by the following claims rather than being limited by the above embodiments, and all technical ideas within the scope of the claims should be construed as being included in the scope of the present invention.

100: fire detection device 130: LED part
132: first LED 134: second LED
120: central processing unit 110:
110a: first sensor group 110b: second sensor group
122: signal input unit 124:
126: Signal output unit 128: Memory
140: Sensitivity adjustment switch 150: Local area communication module
200: terminal

Claims (6)

A fire detection apparatus comprising: a sensor unit for detecting a fire; and a central processing unit for determining a fire based on a detection signal from the sensor unit,
Wherein the sensor unit includes a first sensor group and a second sensor group,
The central processing unit,
A signal input unit receiving sensor signals sensed from the first sensor group and the second sensor group, respectively; A control unit for determining whether a fire is present based on the input sensor signal; And a memory for storing a fire identification algorithm,
Each of the first sensor group and the second sensor group includes a fire factor detecting sensor for detecting a fire factor and a non-fire element detecting sensor for detecting a non-fire element, 2 < / RTI > sensor group,
Wherein the fire factor detection sensor comprises a first sensor for sensing the resonance energy of carbon dioxide-carbon monoxide and a second sensor for detecting the resonance energy of carbon monoxide, wherein the non-fire element detection sensor comprises at least one of arc welding, A third sensor for detecting a wavelength corresponding to an infrared characteristic exhibited by a fluorescent lamp and various colored lamps,
The first sensor group and the second sensor group are installed to sense the same flame detection area,
Wherein the central processing unit is configured to determine whether or not the first fire detection data received from any one of the first sensor group and the second sensor group corresponds to a fire based on the second fire detection data received from the other sensor group To execute a fire authenticity discrimination mode for verifying whether or not a fire has occurred,
Wherein the control unit is configured to apply different fire detection algorithms to the data acquired from any one of the sensor groups that first detected the fire and the data acquired by the other sensor group used to verify whether or not the fire occurred
Fire detection device.
The method according to claim 1,
Wherein the first sensor is a band-pass filter for detecting infrared energy having a wavelength band in the range of 3.8 탆 to 5.0 탆, and the second sensor is a band-pass filter for detecting infrared energy having a wavelength band in the range of 4.5 탆 to 4.9 탆. And the third sensor is a band-pass filter for detecting infrared energy having a wavelength band in the range of 3.9 mu m to 4.1 mu m
Fire detection device. delete delete delete delete

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