KR101895849B1 - System for self-controlling and alarming fire of LED signboard based on calibration, transmission and sensing - Google Patents

Abstract

The present invention discloses a system for self-suppressing and alarming a fire of an LED signboard which determines fire symptom and fire occurrence of an LED signboard by using calibration and sensing techniques and can transmit a warning signal according to the fire occurrence. According to an embodiment of the present invention, the system for self-suppressing and alarming a fire of an LED signboard comprises: the LED signboard including an LED module, a first power supply part supplying a power to the LED module, and an environment sensing part sensing environmental information of the LED signboard by using at least one among a temperature sensor, a humidity sensor and a smoke sensor; a control device individually or in combination analyzing the environmental information sensed by the environment sensing part, determining the fire symptom and the fire occurrence of the LED signboard, transmitting the environmental information and the warning signal to a management server in a state of a fire occurrence step, and blocking the power supply to the LED module; and a power supply device providing a system driving power.

Description

FIELD OF THE INVENTION [0001] The present invention relates to a fire alarm control system, and more particularly,

The present invention relates to an electric signboard using a light emitting diode (LED) and a management technique thereof.

Generally, fire causes much damage to human lives and property, so it is necessary to prevent the fire from spreading in an area generated by suppressing the fire in the early stage. For this purpose, a fire detector is often used. In general, a fire detector is mounted on a ceiling of a building to detect a temperature or smoke when a fire occurs, and a fire alarm signal is transmitted to an electrically connected receiver, .

LED (Light Emitting Diode) is a type of light emitting diode (LED) that emits light when current flows. However, there is no technology to detect the fire occurrence or to protect the LED electric signboard from the fire with the LED electric signboard.

According to one embodiment, an LED electric signboard fire self-suppression and alarm system is proposed, which can determine a fire abnormality indication and a fire occurrence in an LED electric signboard using a correction and sensing technology, and transmit an alarm signal according to a fire occurrence.

According to an embodiment of the present invention, there is provided a fire suppression and alarm system for a fire alarm system, comprising a first power supply unit for supplying power to an LED module and an LED module, at least one of a temperature sensor, a humidity sensor and a smoke sensor, And an environment sensor for detecting environmental conditions of the LED display panel. The LED display panel is used to individually or collectively analyze the environmental information sensed by the environment sensor, To the management server and then interrupts the supply of power to the LED module, and a power supply unit that provides the system drive power.

The control apparatus according to an exemplary embodiment collects environmental information sensed by the environmental sensing unit and transmits the environmental information to the main control unit, analyzes the sensed environmental information to determine whether there is a fire abnormality and a fire occurrence, A fire determination unit for generating a control signal in accordance with the determined fire management step and generating an alarm signal and a shutoff signal as a control signal when it is determined as a fire generation step, a second power supply unit for supplying power to the fire determination unit, A main control unit for receiving the environmental information collected from the fire determination unit and transmitting the received environmental information to the management server; and a control unit for receiving a shutoff signal from the fire determination unit, A relay for interrupting power supply to the module, a controller for outputting a control signal for controlling the LED module, A third power supply unit for receiving the AC power from the AC power source and converting the DC power into DC power and providing the converted DC power to the controller, and a communication unit for transmitting fire related data including environment information and alarm signal to the outside.

A fire determination unit according to an exemplary embodiment detects a fire abnormality using a temperature sensor and a humidity sensor. When a fire abnormality is detected, a smoke amount of the LED display board is measured through a smoke sensor to determine whether a fire occurs.

The fire determination unit according to an embodiment determines that a fire occurs when a sum of environmental information exceeds a preset first threshold or one of environmental information exceeds a preset second threshold.

(n은 측정 횟수)일 수 있다.The control apparatus according to an embodiment further includes a correction unit for correcting a deviation of each sensor to reduce a measurement error of the environment sensing unit and a memory for storing fire related data including a sensor deviation correction value determined by the correction unit, , And the environment sensing unit measures the deviation-corrected environment information of each sensor from the output voltage of each sensor using the determined correction value. The correction unit may include a voltage measurement unit that measures a voltage output from the sensor by repeating a predetermined number of times for each environmental information set and calculates an average voltage of the measured voltages, And may include a correction control section. The correction value Vcalibration = the reference voltage Vref / the average voltage Vavg, and the average voltage Vavg is

(n is the number of times of measurement).

The LED electric signboard fire self-suppression and alarm system converts the control signal generated by the control device into visual information that is visually distinguished according to the fire management step and displays it by a buzzer As shown in FIG.

The LED electric signboard fire self-suppression and alarm system may further include a management server for receiving the environmental information of the LED electric signboard from the control device, monitoring the LED status, and notifying the manager terminal of a fire abnormality warning or a fire occurrence. The management server monitors the LED signs by monitoring the LED signs through the CCTV installed on the LED signboards, monitors the fire signs or fire status of the LED signboards, and records the LED signs around the LED signboards through the CCTV installed around the LED signboards, It is possible to cope with state grasp, analysis of cause of ignition and life structure.

Currently, the LED display panel can not guarantee the safety of the user and the manager due to the absence of the fire alarm system. However, according to the present invention, it is possible to instantaneously judge in real- The environment information and the alarm signal of the LED display board can be transmitted to the management server to ensure the safety of the user and the administrator. By transmitting real-time status information to the management server, it is possible to guarantee the safety of the LED electric signboard and it is easy to check the system of the administrator by installing an external alarm. Also, by proposing an algorithm to reduce the measurement error of the sensor that measures the environment information of the LED electric sign board, it is possible to improve the sensing accuracy by reducing the deviation between the sensors.

Furthermore, the temperature, humidity, and smoke concentration of each facility area can be grasped at a glance by using the status monitor and monitoring function of the LED signboard through the management server, so that a large fire or human accident can be prevented in advance, It is possible to prevent fire accidents in advance. The LED display panel is judged whether there is a fire abnormality and a fire or not. In case of the fire occurrence stage, the power supply of the LED display panel is cut off, and self-repressing is possible by immediately notifying the manager through the management server.

FIG. 1 is a block diagram of a fire alarm and fire alarm system according to an embodiment of the present invention,
FIG. 2 is a detailed configuration diagram of a fire alarm and fire alarm system according to an embodiment of the present invention,
FIG. 3 is a detailed configuration diagram of the correction unit of FIG. 2 according to an embodiment of the present invention;
4 is a reference diagram showing an embodiment of a correction table,
FIG. 5 is a flowchart illustrating a fire alarm method of an LED display panel according to an embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention, and the manner of achieving them, will be apparent from and elucidated with reference to the embodiments described hereinafter in conjunction with the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the invention to those skilled in the art. Is provided to fully convey the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout the specification.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the following description of the present invention, detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. , Which may vary depending on the intention or custom of the user, the operator, and the like. Therefore, the definition should be based on the contents throughout this specification.

Each block of the accompanying block diagrams and combinations of steps of the flowcharts may be performed by computer program instructions (execution engines), which may be stored in a general-purpose computer, special purpose computer, or other processor of a programmable data processing apparatus The instructions that are executed through the processor of the computer or other programmable data processing equipment will generate means for performing the functions described in each block or flowchart of the block diagram.

These computer program instructions may also be stored in a computer usable or computer readable memory capable of directing a computer or other programmable data processing apparatus to implement the functionality in a particular manner so that the computer usable or computer readable memory It is also possible for the instructions stored in the block diagram to produce an article of manufacture containing instruction means for performing the functions described in each block or flowchart of the flowchart.

And computer program instructions may be loaded onto a computer or other programmable data processing equipment so that a series of operating steps may be performed on a computer or other programmable data processing equipment to create a computer- It is also possible that the instructions that perform the data processing equipment provide the steps for executing the functions described in each block of the block diagram and at each step of the flowchart.

Also, each block or step may represent a portion of a module, segment, or code that includes one or more executable instructions for executing the specified logical functions, and in some alternative embodiments, It should be noted that functions may occur out of order. For example, two successive blocks or steps may actually be performed substantially concurrently, and it is also possible that the blocks or steps are performed in the reverse order of the function as needed.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the following embodiments of the present invention may be modified into various other forms, and the scope of the present invention is not limited to the embodiments described below. The embodiments of the present invention are provided to enable those skilled in the art to more fully understand the present invention.

FIG. 1 is a block diagram of a fire alarm and fire alarm system according to an embodiment of the present invention. Referring to FIG.

1, the LED electric signboard fire self-suppression and alarm system 1 includes an LED electric signboard 2, a control device 3, a power supply device 4, an alarm device 5 and a management server 6 .

The LED electric sign board 2 is composed of N x M LED modules. Each LED module is composed of a plurality of LEDs, and various colors can be implemented depending on whether the LEDs emit light or intensity. For example, a plurality of LEDs are arranged in a uniform array on the surface of the LED module. The LED display panel 2 may be a VMS (Variable Message Sign) located on the road side. Traffic signboards are equipment to improve traffic flow efficiency and traffic safety by providing real-time information to road users about traffic volume, traffic accidents, congestion zones, weather conditions and construction control. However, this is only one embodiment for facilitating understanding of the present invention, and the LED electric sign board 2 is not limited to the traffic light signboard.

The control device 3 controls the LED electronic sign 2. The control device 3 can be, for example, a computer, and can be controlled through a software program. The control device 3 according to an embodiment predicts the fire occurrence of the LED display panel 2, generates and transmits an alarm signal when a fire occurs, and protects the LED display panel 2 from fire. The fire of the LED display board 2 is one of the most important objects of safety for the user (for example, the driver) and the manager. The present invention can protect the LED display board 2 from fire by adding an environmental sensing unit and an alarm to the LED display board system and notifying the management server 6 of a fire alarm.

The LED display board 2 includes at least one sensor for sensing environmental information. The environmental information can be temperature, humidity, smoke, etc., and the sensor can be a temperature sensor for detecting temperature, a humidity sensor for detecting humidity, a smoke sensor for detecting smoke, and the like. Each sensor may be embedded in the LED display board 2 or may be in an enclosed form. The environmental information detection can be performed in real time, can be performed at predetermined period intervals, and can be differentiated according to the fire control step.

The controller 3 individually or collectively analyzes the environmental information sensed by each sensor to determine whether there is a fire abnormality in the LED electric sign board 2 and whether or not a fire has occurred. At this time, if the state of the fire is generated (for example, when the temperature exceeds the threshold temperature), after the environment information and the alarm signal are transmitted to the management server 6, the electric power supply to the LED electric sign board 2 is cut off . The control device 3 transmits the environmental information of the LED display panel 2 to the management server 6 and further transmits a fire abnormality symptom and a fire occurrence judgment result according to the environmental information analysis to the management server 6. The control device 3 can receive the control command from the management server 6 and control the LED electric sign board 2 according to the control command.

The management server 6 is connected to the control device 3 and monitors the status of the LED display board 2. [ The management server 6 may be a central control center. The management server 6 can receive environment information from the control device 3 in real time. In this case, the management server 6 can monitor the state of the LED display board 2 in real time. As another example, the management server 6 may receive environmental information corresponding to the divided fire management steps through the control device 3. [ For example, when the control device 3 detects an abnormality symptom that appears before the fire generation step through temperature and humidity detection or the like, it is determined to be a state of attention, and the environmental information is notified to the manager of the management server 6. The central manager of the management server 6 monitoring the state of the LED electric sign board 2 can prevent the accident before the fire occurs by arranging the local manager to patrol the suspicious LED electric sign board 2. The local administrator may be a technical engineer. As a result of the determination by the control device 3, if the LED display panel 2 is in the fire generation phase, an alarm signal is immediately notified to the central manager of the management server 6 and the power of the LED display panel 2 is turned off, 2) can be protected against fire. The management server 6 can transmit alert information to the terminal of the local administrator at the time of detection of a fire abnormality or a fire. At this time, the transmission method may be a short message (SMS), a social network service (SNS) message, or the like, but is not limited thereto.

The management server 6 can be connected to a plurality of control devices 3, and can designate an alarm priority according to the fire management step, and can transmit a short message in real time when a fire alarm occurs. In addition, real-time monitoring is possible, and data can be displayed or saved on the screen by editing data in the form of graph and EXCEL. The management server 6 according to the embodiment controls the position of a fire point (LED electric signboard) transmitted in real time in the controller 3, environmental information (e.g., temperature, humidity, smoke information) The data can be displayed as a database and displayed as a graph, and the past data and the current data can be compared to monitor the progress of the facility and the surrounding change. The management server 6 photographs the LED electric signboard 2 by using the CCTV installed in the LED electric signboard 2 to monitor the fire sign or the fire occurrence state of the LED signboard 2 and displays it on the periphery of the LED signboard 2 By using the installed CCTV, it is possible to detect the fire status, analyze the cause of fire, and cope with the lifesaving structure by shooting the LED screen and the evacuation route.

The power supply unit 4 provides the system drive power. The power supply unit 4 may include an electric distribution board for controlling distribution and distribution. The alarm 5 converts the control signal generated by the control device 3 into visual information that is visually distinguished according to the fire management step and displays it. Furthermore, a warning sound can be generated through a buzzer in the fire generation step. The management server 6 may be located remotely, and the alarm 5 may be located at a short distance. For example, the control device 3 communicates with the remote server 6 at a remote place by a TCP / IP communication method and communicates with the alarm 5 via a serial communication (RS-232, RS-422, RS- It is possible to communicate by a short-range wireless communication method such as ZigBee.

FIG. 2 is a detailed block diagram of a fire alarm and fire alarm system according to an embodiment of the present invention. Referring to FIG.

1 and 2, an LED electric signboard fire self-suppression and alarm system 1 includes an LED electric signboard 2, a control device 3, a power supply device 4 and an alarm 5.

The LED display panel 2 according to one embodiment includes an LED module 20, a first power supply unit 22, and an environment sensing unit 24. [ The first power supply unit 22 supplies power to the LED module 20. The first power supply unit 22 receives AC power (for example, 220 V AC) from the relay 33 and converts it to a DC power (for example, 5 V DC) and supplies the converted DC power (for example, DC) to the LED module 20. The first power supply unit 22 may be a switched mode power supply (SMPS). The supply of power to the LED module 20 of the first power supply unit 22 is controlled by the relay 33 of the control device 3. The LED module 20 is under the control of the controller 34 of the control device 3.

The environment sensing unit 24 senses environmental information of the LED display board 2, and the environmental information may be temperature information, humidity information, smoke information, and the like. The environment sensing unit 24 includes a sensor for sensing environmental information, and the sensor may include at least one of a temperature sensor 240, a humidity sensor 242, and a smoke sensor 244. [ The temperature sensor 240 detects the temperature and transmits the temperature information to the fire determination unit 30 of the control device 3. The humidity sensor 242 senses the humidity and transmits the humidity information to the fire determination unit 30 The smoke sensor 244 senses smoke and transmits the smoke information to the fire determination unit 30. At this time, the fire determination unit 30 can individually or integrally analyze environmental information collected from the respective sensors to determine a fire abnormality and a fire occurrence.

Although the present invention is described based on the temperature sensor 240, the humidity sensor 242 and the smoke sensor 244, other carbon dioxide measurement sensors, overcurrent measurement sensors, leak detection sensors, tilt measurement sensors, acceleration measurement sensors, And the information detected by the extended sensor can be used to detect the fire abnormality and to detect the fire occurrence. When a fire abnormality is detected using the temperature sensor 240 and the humidity sensor 242, the amount of smoke in the LED display panel 2 is measured through the smoke sensor 244, It can be judged.

Each of the sensors 240, 242, and 244 constituting the environment sensing unit 24 can sense environmental information in a preset unit. For example, the temperature sensor 240 senses a predetermined unit (degree) in order to measure the temperature in the LED electronic signboard 2, and the humidity sensor 242 senses the humidity in a predetermined unit (%) . The preset unit may vary depending on how high the accuracy is. For example, the temperature sensor 240 senses the temperature in the LED display board 2 in units of 10 degrees, and the humidity sensor 242 senses the humidity in units of 10%. 2, each of the sensors 240, 242, and 244 is shown as one sensor, but each sensor 240, 242, and 244 may include more than one sensor in the LED display panel 2 to prevent false detection. The sensing intervals of the sensors 240, 242, and 244 may be set. When the sensing interval is set to 10 seconds, the temperature sensor 240 performs sensing every 10 seconds. Furthermore, the sensing interval can be adjusted according to the situation of the measurement area. For example, the higher the fire generation stage, the shorter the sensing interval. Each of the sensors 240, 242, and 244 can sense environmental information and obtain a voltage value at this time. For example, the temperature sensor 240 senses the temperature and measures the voltage value at that temperature. The humidity sensor 242 senses the humidity and measures the voltage value at the corresponding humidity.

The control device 3 according to an embodiment includes a fire determination unit 30, a second power supply unit 31, a main control unit 32, a relay 33, a controller 34, a third power supply unit 35, A communication unit 36, a correction unit 37, and a memory 38. [

The fire determination unit 30 collects environmental information sensed by the environment sensing unit 24 and transmits the collected environmental information to the main control unit 32. The fire control unit 30 analyzes the sensed environmental information to determine whether there is a fire abnormality or a fire, Decide on the fire management stage accordingly. The fire management phase can be classified into a normal phase, a caution phase 1, a caution phase 2 and a fire occurrence phase, but is not limited thereto.

The fire determination unit (30) generates a control signal in accordance with the determined fire management step. The control signal is a normal signal indicating that the LED electronic signboard 2 is normal in the normal phase, a caution signal requiring caution due to the occurrence of a fire abnormality symptom in the note 1, the note 2, an alarm signal indicating a fire occurrence in the fire occurrence step, A shutoff signal for shutting off power at the time of occurrence, and the like. When it is determined that the fire is generated, the fire determination unit 30 generates an alarm signal and a shutoff signal as control signals.

The fire determination unit 30 according to an embodiment determines that the sum of the environmental information exceeds a predetermined first threshold value or a fire generation step if any one of the environmental information exceeds a preset second threshold value . For example, if the sum of the first voltage measured through the temperature sensor 240 and the second voltage measured through the humidity sensor 242 exceeds a preset first threshold value, it is determined to be a fire generation step. As another example, although the sum of the first voltage measured through the temperature sensor 240 and the second voltage measured through the humidity sensor 242 does not exceed the predetermined first threshold value, the temperature sensor 240 When the measured first voltage exceeds a predetermined second threshold value or the second voltage measured through the humidity sensor 242 exceeds a preset second threshold value, it is determined to be a fire generation step. At this time, the second threshold value serving as a reference of the temperature sensor 240 and the second threshold value serving as a reference of the humidity sensor 242 may be the same or different from each other.

When at least one temperature sensor 240 and at least one humidity sensor 242 are provided, the fire determination unit 30 may determine a fire abnormality with a value measured by at least one sensor. For example, when two or more temperature sensors 240 are disposed in different areas, if any one of the sensors detects an abnormal symptom, the management server 6 is notified of the abnormality and an alarm signal is generated through the alarm .

The fire determination unit (30) transmits the collected environment information to the management server (6). Further, when it is determined that the fire is generated, an alarm signal may be transmitted to the management server 6 and the alarm 5, and a shutoff signal may be provided to the relay 33. The control unit 30 notifies the management server 6 of the environmental information collected from the environment sensing unit 24 and then switches the relay 33 on And turns off the LED electric sign board 2 as the power supplied to the LED module 20 is cut off. That is, whether the relay 33 is switched on / off can be determined according to environmental information collected through the sensor, for example, temperature information / humidity information.

The second power supply unit 31 supplies DC power, for example, 5 V DC, to the fire determination unit 30. The second power supply 31 may be a switched mode power supply (SMPS). The main control unit 32 is a module for controlling each component of the control device 3 and receives environmental information collected from the fire determination unit 30 and transmits the environmental information to the management server 6 through the communication unit 36 . The main control unit 32 is supplied with electric power, for example, 220 V AC, from the power distribution board 40 of the power supply unit 4. The relay 33 is switched on in response to the cutoff signal received from the fire determination unit 30 and transmits a short signal to the first power supply unit 22 to cut off the power supply to the LED module 20 . The relay 33 may be a solid state relay (SSR). The relay 33 is supplied with power, for example, 220 V AC, from the power distribution board 40 of the power supply 4. The controller 34 outputs a control signal for controlling the LED module 20. The third power supply unit 35 receives the AC power (for example, 220 V AC) from the power distribution board 40 of the power supply unit 4 and converts it into a DC power (for example, 5 V DC) And supplies a power source (for example, 5 V DC) to the controller 34. The third power supply unit 35 may be a switched mode power supply (SMPS). The communication unit 36 is a module for communicating with the outside, and transmits fire related data to the outside. For example, environmental information and an alarm signal are transmitted to the outside, for example, the management server 6.

The correction unit (37) corrects the deviation of each sensor to reduce the measurement error of the environment sensing unit (24). Since the measurement values may be different from each other depending on the environment given to each sensor, the correction unit 37 corrects the measurement error of each sensor and intends to improve the measurement accuracy of the sensor. The memory 38 stores the fire related data including the sensor deviation correction value determined by the correcting unit 37. [ The correction of the correction unit 37 and the correction value storage in the memory 38 can be performed before each LED display board 2 is released. The environment sensing unit 24 of the control device 3 can measure the deviation-corrected environment information of each sensor from the output voltage of each sensor by using the determined correction value. For example, since the correction value of the temperature sensor has been determined, the deviation corrected temperature of the temperature sensor can be subsequently measured from the output voltage of the temperature sensor using the correction value. The detailed configuration and the embodiment of the correction unit 37 will be described later with reference to Figs. 3 and 4. Fig.

The memory 38 stores information necessary for the operation of the controller 3 and information generated according to the performance of the operation. The memory 38 according to an exemplary embodiment stores the collected environmental information and the fire control step determination criteria for each environmental information in order to determine a fire abnormality symptom and a fire occurrence of the ED electric signboard.

The power supply unit 4 provides the system drive power. The power supply 4 may include an electrical distribution board 40 for controlling distribution and distribution. The alarm 5 converts the control signal generated by the control device 3 into visual information that is visually distinguished according to the fire management step and displays it. Furthermore, the alarm 5 may further include a buzzer for generating a warning sound in the fire generation step. The LED color of the alarm 5 can be displayed differently according to the time information display of the alarm 5, for example, the fire control step. That is, the green color of the alarm 5 indicates that the LED display 2 is in a steady state, the blue indicates the first step of the note, the yellow indicates the second step of the note, and the red indicates the fire alarm step. CAUTION In step 1 and 2, check the LED display board (2). The embodiment described above is only one example for facilitating the understanding of the present invention, and the time information distinguished according to each fire management step can be changed according to the administrator setting.

FIG. 3 is a detailed configuration diagram of the correction unit of FIG. 2 according to an embodiment of the present invention, and FIG. 4 is a reference diagram illustrating an embodiment of a correction table.

Referring to FIGS. 3 and 4, the correction unit 37 includes a voltage measurement unit 370 and a correction control unit 372.

The voltage measuring unit 370 measures a voltage output from the sensor by repeating a predetermined number of times (for example, 10) for each environmental information set, and calculates an average voltage of the measured voltages. The correction control unit 372 determines the correction value of the sensor for each environmental information set. At this time, the correction value (Vcalibration) is the reference voltage (Vref) / average voltage (Vavg), and the average voltage is expressed by the following equation (1).

In Equation (1), n is the number of measurements and a _k is the measured voltage.

The reference voltage Vref is a value set by the manufacturer in advance as a reference value, and the average voltage Vavg is an actual measured value. For example, when the temperature measured through the temperature sensor is -30 ° C, the average value of the voltages measured 10 times repeatedly is 1.1V, and when the temperature is -30 ° C, the reference value preset by the manufacturer is 1.0V. A series of processes of the correcting unit 37 can be performed before the LED display board is released.

Hereinafter, an algorithm for reducing the measurement error of the sensor will be described with reference to the embodiments. First, according to the algorithm for reducing the deviation of the temperature sensor, the average voltage according to the temperature measurement value is measured. The temperature information set may be, for example, -30 degrees, -20 degrees, -10 degrees, 0 degrees, 10 degrees, 20 degrees, 30 degrees, 40 degrees, 50 degrees, 60 degrees, 70 degrees, Measure the average voltage for each temperature information (temperature measurement value) set. Then, the temperature correction value is calculated for each temperature information set. The temperature correction value (Vcalibration) is the temperature reference voltage (Vref) / temperature average voltage (Vavg), and the temperature average voltage is the same as the above-described Equation (1).

According to the algorithm for reducing the deviation of the humidity sensor, the average voltage according to the humidity measurement value is measured. The humidity information set is, for example, 50%, 60%, 70%, 80%, 90%, and 100%, and the average voltage is measured for each set of humidity information (humidity measurement value). The humidity correction value is calculated for each set of humidity information. The humidity correction value (Vcalibration) is a humidity reference voltage (Vref) / humidity average voltage (Vavg), and the humidity average voltage is the same as the above-described formula (1).

According to the algorithm to reduce the deviation of the smoke sensor, the average voltage according to air pollution degree is measured. The air pollution degree set is, for example, 0 ppm, 50 ppm, 100 ppm, 150 ppm, 200 ppm, and 250 ppm, and the average voltage is measured for each set of air pollution degree information (air pollution degree measurement value). The humidity correction value is calculated for each set of air pollution information. The smoke correction value (Vcalibration) is the smoke reference voltage (Vref) / smoke mean voltage (Vavg), where the smoke average voltage is as in Equation (1).

The correction values calculated through the respective sensors are stored in the memory 37 of Fig. 2 in the form of a correction table. For example, in the case of the temperature correction table, the correction value of -30 degrees is the reference voltage at -30 degrees / average voltage at -30 degrees. The correction value at 80 degrees is (reference voltage at 80 degrees / average voltage at 80 degrees). When the reference voltage at -30 degrees is 1.0 V and the average voltage at -30 degrees is 1.1 V, the correction value at -30 degrees is 0.90. An example of the correction table is as shown in Fig. The calibration table can be applied to the system to reduce the measurement error.

FIG. 5 is a flowchart illustrating a fire alarm method of an LED display panel according to an embodiment of the present invention.

1 and 5, the control device 3 of the fire alarm and fire alarm system 1 of the LED electric sign board detects environmental information of the LED display panel 2 by using at least one sensor in the LED display panel 2 (510) and analyzes the sensed environmental information individually or in combination (520) to determine whether a fire abnormality of the LED display panel (2) and a fire have occurred (530). At this time, it is determined whether or not the fire generation step has been entered (540). When entering the fire generation step, an alarm signal is generated and the sensed environment information and alarm signal are transmitted to the management server 6 (550) 2 from the power supply 560. Further, in the fire generation step, the alarm signal is converted into visually distinguishable time information and displayed through an alarm, and a warning sound can be generated through the buzzer of the alarm when necessary. The management server 6 receives the environmental information of the LED display panel from the control device 3, monitors the LED status, and notifies the administrator terminal when a fire abnormality or a fire is detected.

The embodiments of the present invention have been described above. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. Therefore, the disclosed embodiments should be considered in an illustrative rather than a restrictive sense. The scope of the present invention is defined by the appended claims rather than by the foregoing description, and all differences within the scope of equivalents thereof should be construed as being included in the present invention.

1 LED display board Fire self-suppression and alarm system 2: LED display board
3: Control unit 4: Power supply unit
5: alarm 6: management server
20: LED module 22: first power supply part
24: environment detection unit 30: fire judgment unit
31: second power supply unit 32:
33: Relay 34: Controller
35: third power supply unit 36:
37: Correction unit 38: Memory
40: Switchboard 240: Temperature sensor
242: Humidity sensor 244: Smoke sensor
370: voltage measuring unit 372:

Claims (10)

An LED display panel including an LED module, a first power supply unit for supplying power to the LED module, and an environment sensing unit for sensing environmental information of the LED display board using at least one of a temperature sensor, a humidity sensor and a smoke sensor.
The environmental information sensed by the environment sensing unit is individually or collectively analyzed to determine whether there is a fire abnormality and a fire occurrence in the LED display panel, and in a fire generation step state, environmental information and an alarm signal are transmitted to the management server, A control device for interrupting the supply of power to the plasma display panel; And
A power supply for providing system drive power; Lt; / RTI >
The control device
A correction unit for correcting a deviation of each sensor to reduce a measurement error of the environment sensing unit; And
A memory for storing fire related data including a sensor deviation correction value determined by the correcting unit; / RTI >
The correction unit
A voltage measuring unit for measuring a voltage output from the sensor by repeating a predetermined number of times for each set of environmental information and calculating an average voltage of the measured voltages; And
A correction control unit for determining a correction value of the sensor for each environmental information set; Lt; / RTI >
The correction value Vcalibration = the reference voltage Vref / the average voltage Vavg, and the average voltage Vavg is

(where n is the number of measurements and a _k is the measured voltage)
The environment sensing unit
And correcting the environment information of each sensor based on the output voltage of each sensor by using the sensor deviation correction value determined by the correcting unit. The control device according to claim 1, wherein the control device
The control unit collects environmental information sensed by the environment sensing unit and transmits the collected environmental information to the main control unit. The sensed environmental information is analyzed to determine whether there is a fire abnormality and a fire occurrence, determines a fire management step according to the determination result, A fire determination unit for generating a control signal according to the step, and generating an alarm signal and a shutoff signal as a control signal when it is determined to be a fire generation step;
A second power supply unit for supplying power to the fire determination unit;
A main control unit for receiving environment information collected from the fire determination unit and transmitting the received environmental information to a management server;
A relay for turning off the power supply to the LED module by transmitting a short circuit signal to the first power supply unit according to the received blocking signal upon receiving the blocking signal from the fire determination unit;
A controller for outputting a control signal for controlling the LED module;
A third power supply unit for receiving the AC power from the power supply unit and converting the DC power into DC power and providing the converted DC power to the controller; And
A communication unit for transmitting fire related data including environmental information and an alarm signal to the outside;
Further comprising a light emitting diode (LED) display panel. 3. The apparatus of claim 2, wherein the fire determination unit
And a smoke sensor detects a fire abnormality by using a temperature sensor and a humidity sensor and measures the smoke amount of the LED display board when a fire abnormality is detected to determine whether or not a fire has occurred. system. 3. The apparatus of claim 2, wherein the fire determination unit
When the sum of the environmental information exceeds a predetermined first threshold or when one of the environmental information exceeds a preset second threshold value, the LED is determined to be a fire generation step. . delete delete delete 2. The fire alarm system according to claim 1,
An alarm for converting a control signal generated by the control device into visual information visually distinguished according to a fire management step and generating a warning sound through a buzzer in a fire generating step if necessary;
Further comprising a light emitting diode (LED) display panel. 2. The fire alarm system according to claim 1,
A management server for receiving the environmental information of the LED display panel from the control device and monitoring the status of the LED display panel and notifying the manager terminal of a fire abnormality warning or a fire occurrence;
Further comprising a light emitting diode (LED) display panel. The system according to claim 9, wherein the management server
The LED electric signboard is photographed through the CCTV installed on the LED electric signboard to monitor the fire sign or the fire occurrence state of the LED signboard, and the surroundings of the LED signboard and the escape route state are photographed through the CCTV installed around the LED signboard, Fire alarm, fire alarm, fire alarm, fire alarm, fire alarm, fire alarm, fire alarm,

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