KR20090082800A - Fire detection system - Google Patents

Abstract

A fire detecting system is provided to promptly inform a building manager, an administrator and a disaster prevention center of fire by using wire or wireless communications. A fire detecting system comprises a heat sensor(15), a smoke sensor(17), sensing units(11,13), an amplifying circuit(21), a microprocessor(40), a fire displaying unit, a communication interface unit(72) and a relay driving unit(77). The heat sensor senses the heat. The smoke sensor senses the smoke. The sensing units include an UV sensor and an IR sensor. The amplifying circuit amplifies the signal of the sensing units. The signal of the amplifying circuit is inputted to the microprocessor. The fire displaying unit is connected to an outputting terminal of the microprocessor. The communication interface unit transmits a fire signal to a disaster prevention center and a mobile communication terminal. The relay driving unit is connected to the outputting terminal of the microprocessor.

Description

Fire detection system

The present invention relates to a fire detection system, and more particularly, to a fire detection system that can accurately detect the occurrence of the fire to reduce the malfunction and non-operation.

Fire fighting equipment is an important device that protects people's lives and property from fire.In general, many households, including large-scale facilities and populated areas such as factories, industrial facilities, government offices, schools, financial institutions, apartments, underground common areas, etc. Is also installed.

In the event of a fire, there is a transmitter for manually sending a fire signal to a receiver or a repeater by manually operating a switch by a person who finds a fire, but such a device is inconvenient to be operated by human operation.

Thus, as a fire monitoring fire equipment that detects fire early and automatically notifies fire alarm by using heat or smoke generated during fire, heat detectors, smoke detectors, composite detectors, and flame detectors have been developed.

The double flame detector operates when the change of the flame radiated from the flame exceeds a certain amount. The flame detector detects the fire by detecting the ultraviolet rays among the flames. In addition, there is an infrared flame detector that detects the occurrence of a fire by detecting infrared rays among the flames, and a hybrid flame detector of a combination of ultraviolet and infrared rays that detects the occurrence of a fire by detecting ultraviolet rays and infrared rays among the flames.

The fire signal emitted by the flame detector is used as a signal to operate the alarm bell to inform people around the fire occurrence of the fire, and also transmits to the receiver of the fire department through a repeater to alert the person concerned of the fire object. .

However, the fire detector of the conventional fire monitoring system has a narrow range in which the detector can be selected according to the types of ultraviolet and infrared wavelengths emitted from the flame according to various combustion substances in the fire zone, which causes problems in sensitivity and response speed. There are frequent problems.

In addition, the sensitivity of the monitoring window is reduced due to dust, which can cause a lack of detection.In the fire prevention method, the existing fire detectors are installed at a height of more than 20m where the detection effect is problematic.In the semiconductor factory, nuclear power plant, chemical complex, steel complex, and paper Because it is installed in the old fire and large fire zones such as factories, it is not possible to self-diagnostic alarm or automatic diagnosis monitoring of the detector's operation status, abnormal status, etc.

Conventional fire monitoring system has a RS485 communication between the detector and the repeater, there is a problem that a fire occurrence signal can not be transmitted in the communication disconnection state due to a short circuit of the communication line.

The present invention has been made to improve the above problems, an object of the present invention is to provide a fire detection system that can accurately detect the occurrence of fire to reduce the malfunction and non-operation.

Another object of the present invention is to provide a fire detection system that can immediately transmit the occurrence of a fire by using a wired and wireless communication to the disaster prevention center or building manager or manager.

The fire detection system of the present invention for achieving the above object comprises a detection unit having a heat detection sensor for detecting heat, a smoke detection sensor for detecting smoke, and an ultraviolet and infrared detection sensor for detecting a flame; An amplifier circuit for amplifying the signal of the detector; A microcomputer for inputting a signal of the amplifying circuit to an input terminal; A fire display unit connected to an output terminal of the microcomputer to display a fire occurrence; A communication interface unit connected to an output terminal of the microcomputer and transmitting a fire transmission signal to a disaster prevention center and a mobile communication terminal through wired communication using RS485 and wireless communication using RF; And a relay driver connected to an output terminal of the micom and operating a fire receiving panel according to the control signal of the micom.

The microcomputer outputs a primary fire occurrence signal by a fire signal input from any one of a heat sensor, a soft sensor, and an ultraviolet and infrared sensor of the detection unit, and further inputs a fire signal from the remaining sensors. If it is characterized in that for outputting a second fire occurrence signal.

And a lamp unit having an infrared lamp and an ultraviolet lamp operated by a control signal of the microcomputer for the self-diagnosis of the infrared and ultraviolet detecting sensors.

As described above, the fire detection system of the present invention provides a fire detection system that can accurately detect the occurrence of a fire by detecting smoke and heat as well as a flame, thereby reducing malfunction and non-operation.

In addition, by using wired and wireless communication to the disaster prevention center or building manager or manager immediately transmits the occurrence of the fire can be suppressed early to minimize the damage to people and property.

Hereinafter, a fire detection system according to a preferred embodiment of the present invention with reference to the accompanying drawings will be described in detail.

1 is a block diagram of a fire detection system according to an embodiment of the present invention.

Referring to FIG. 1, the fire detection system of the present invention includes a large detection unit for detecting a fire, an amplifying circuit for amplifying a detection unit, a microcomputer to which a signal of the amplification circuit is input, and a fire display unit connected to an output terminal of the microcomputer. And a communication interface unit and a relay driving unit.

The detector detects heat (HEAT), smoke (SMOKE), flame (FLAME), etc. generated during a fire, and informs the outside that a fire has occurred. The sensing unit applied to the present invention includes a heat sensor 17 for detecting heat, a soft sensor 15 for detecting smoke, and an infrared and ultraviolet sensor 13 and 11 for detecting a flame.

The infrared sensor 13 and the ultraviolet sensor 11 for detecting the flame detect infrared rays or ultraviolet rays included in the light emitted from the flame generated by the fire. When the signal input from the infrared sensor 13 and the ultraviolet sensor 11 exceeds the set value, the microcomputer 40 recognizes that a fire has occurred and generates a fire occurrence alarm to the outside.

The amplifying circuits 23 and 21 connected to the output terminals of the infrared and ultraviolet sensing sensors 13 and 11 receive infrared or ultraviolet sensing signals input from the infrared or ultraviolet sensing sensors 13 and 11 by the operation of operational amplifiers. Amplification to the voltage level available in the microcomputer 40. The signals amplified by the amplifying circuits 23 and 21 are input to the infrared or ultraviolet pulse counters 33 and 31. When a pulse predetermined by a program is input to the infrared or ultraviolet pulse counters 33 and 31, a fire signal is input, and when a pulse is not input, a standby signal is input to the microcomputer 40.

The infrared and ultraviolet sensors are installed in a protective outer case. In this case, when the light by the flame is incident through the flame detection window provided in the housing, the infrared or ultraviolet sensor 13, 11 detects the infrared or ultraviolet rays included in the incident light to generate a change in the electrical signal. .

Flame detectors, such as infrared or ultraviolet sensors, are mainly used to respond to artificial fires such as arson and terrorism. Fires caused by arson and terror are not fires that develop slowly, but fires that develop rapidly by rapid combustion (FAST BURN, or ULTRA FAST BURN). Fires caused by arson or terrorism generate the flames first, so the flame detector can detect fires most quickly.

However, a conventional fire monitoring system using only ultraviolet and infrared sensors has a problem that a fire cannot be detected even if a fire occurs when the sensor has its own failure or the flame detection window is contaminated.

Therefore, the fire detection system of the present invention further includes a heat detection sensor 17 and a soft detection sensor in addition to the ultraviolet and infrared detection sensors.

The heat sensor 17 is a kind of fire detector that notifies fire occurrence by sensing heat or temperature using a thermistor or thermocouple. The signal output from the thermal sensor 17 is amplified by the amplifier circuit 27 and input to the microcomputer 40. In this case, the microcomputer 40 recognizes that a fire has occurred when a fire signal exceeding a set value is input and generates a fire occurrence alarm to the outside.

The smoke sensor 15 detects smoke generated in a fire by using a correlation between smoke concentration and an optical phenomenon such as light absorption or scattering generated when light passes through a gas including smoke particles.

Although not shown, the annual sensor 15 is composed of a light emitting element and a light receiving sensor that is an optical sensor. When air enters from the outside through a small hole or a groove formed in the housing in which the soft sensor sensor 15 is embedded, smoke particles contained in the air scatter light emitted from the light emitting device. When the scattered light enters the light receiving sensor, the light receiving sensor generates a signal in proportion to the amount of incident light. That is, the output signal generated from the light receiving sensor has a relationship proportional to the concentration of the smoke particles. As described above, the signal output from the soft detection sensor 15 is amplified by the amplification circuit 25 and input to the microcomputer 40. The microcomputer 40 recognizes that a fire has occurred when the signal from the soft detection sensor 15 exceeds a set value and generates a fire occurrence alarm to the outside.

As described above, the fire detection system of the present invention is equipped with a heat detection sensor 17 and a soft detection sensor 15 as well as ultraviolet and infrared detection sensors 11 and 13 for detecting a flame when a fire occurs. It is possible to reduce the malfunction and non-operation of the infrared sensor (11) (13).

In addition, the fire detection system of the present invention is a fire signal from any one of the thermal sensor 17, the annual sensor 15, the ultraviolet and infrared sensor 11, 13 to detect the fire more accurately Is input to the microcomputer 40, the microcomputer 40 outputs a primary fire occurrence signal.

In addition, when a fire signal is input from at least one of the remaining sensors or at least two sensors, a second fire occurrence signal may be output to accurately determine the occurrence of the fire. This has the advantage that even if a fire signal is input due to a malfunction of one sensor, it is possible to determine that the sensor is malfunctioning unless a fire signal is input from another sensor.

On the other hand, for the self-diagnosis of the infrared and ultraviolet sensor 13, 11 is further provided with a lamp unit having an infrared lamp 53 and the ultraviolet lamp 51 which is operated by the control signal of the microcomputer 40.

This self-diagnosis is to check the operating state of the sensor, the contamination state of the flame monitoring window, when the operation signal is sent by pressing the operation switch of the remote control transmitter 61, the signal from the remote control receiver 63 to the microcomputer 40 Is entered. When the signal is input, the microcomputer 40 applies a voltage to the UV lamp 51 or the infrared lamp 53 for self-diagnosis to emit ultraviolet light or infrared light through the flame monitoring window, thereby controlling the contamination state of the monitoring window and the operation state of the sensor. Diagnosis is made. The inspection LED lamp 55 is displayed in green when the infrared and ultraviolet detection sensors 53 and 51 are normal, and when the sensor is abnormal, it is displayed in red so that the state of the detector can be always checked.

The self-diagnosis may be automatically performed by the microcomputer 40 by the automatic time setting switch (not shown) according to the set time of the monitoring window and the detector operating state.

The signal input to the microcomputer 40 is signal-processed and controlled by the microcomputer 40 to program control the self-diagnostic function, sensitivity adjustment setting, sensitivity time delay function, communication function, pulse operation function, display function, output function, and the like.

The memory 45 connected to the input / output terminal of the microcomputer is a semiconductor memory device such as EEPROM, and a communication program for transmitting a fire occurrence signal to the disaster prevention center 81 to which the microcomputer 40 is connected to the outside. , Communication ID and microcomputer's program are saved.

The detection signal processed by the microcomputer 40 is transmitted to the fire display unit 71, the relay driver 77, and the communication interface unit 72 to output a signal capable of cooperatively controlling the fire detection signal with other devices.

When the transistor is switched according to the control signal of the microcomputer 40, the relay driver 77 switches the connected state of the switching contact accordingly. The switching contact of the relay is connected to the P-type receiving panel, R-type receiving panel, halon receiver, equipment and other auxiliary equipment as the fire-receiving receiving unit 85 to perform the alarm and extinguishing action corresponding to the fire occurrence.

And the fire indicator 71 is not shown, but is connected to the output terminal of the microcomputer 40 is composed of an LED power indicator to indicate whether the operation of the device and an LED fire indicator to indicate the occurrence of fire. The LED power indicator is normally lit with green LED, red LED in case of fire, and yellow LED blinks when RS485 communication is used.

In addition, the communication interface unit 72 is for performing wired communication 73 using RS485 and wireless communication 75 using RF, and transmits a fire occurrence signal to an external disaster prevention center 81 and a building manager or a building owner's mobile communication. Transfer to the terminal 83.

RS485 75 is a serial asynchronous communication called the multi-point bus method (half-duplex communication). With RS485 wired communication, the fault signal and fire signal of each detector are transmitted through each repeater.

RF communication 73 is designed to use the RF driver and to operate the frequency elastically. RF communication transmits data to each repeater at high frequency of 2.4GHz.

The microcomputer 40 dials a phone number stored in the memory in the event of a fire through the communication interface 72 to transmit a specified text message and to notify the fire situation of the fire through a voice message. The communication interface 72 automatically transmits a call number and an alarm message or voice output from the microcomputer 40 using a wireless communication network or a wired communication network.

Although the present invention has been described with reference to one embodiment shown in the drawings, this is merely exemplary, and it will be understood by those skilled in the art that various modifications and equivalent embodiments thereof are possible.

Therefore, the true scope of protection of the present invention should be defined only by the appended claims.

1 is a block diagram of a fire detection system according to an embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

11: UV sensor 13: Infrared sensor

15: year sensor 17: heat sensor

21: amplification circuit 40: microcomputer

81: disaster prevention center 83: mobile terminal

Claims (3)

A detection unit having a heat detection sensor for detecting heat, a smoke detection sensor for detecting smoke, and an ultraviolet and infrared detection sensor for detecting a flame; An amplifier circuit for amplifying the signal of the detector; A microcomputer for inputting a signal of the amplifying circuit to an input terminal; A fire display unit connected to an output terminal of the microcomputer to display a fire occurrence; A communication interface unit connected to an output terminal of the microcomputer and transmitting a fire transmission signal to a disaster prevention center and a mobile communication terminal through wired communication using RS485 and wireless communication using RF; And a relay driver connected to an output terminal of the micom and operating a fire receiving panel according to the control signal of the micom. The method of claim 1, wherein the microcomputer outputs a first fire occurrence signal by a fire signal input from any one of a heat detection sensor, a soft detection sensor, and an ultraviolet ray and an infrared ray detection sensor of the detection unit, and from the remaining sensors The fire monitoring system, characterized in that for outputting a second fire signal when the fire signal is further input. The apparatus of claim 1, further comprising: a lamp unit having an infrared lamp and an ultraviolet lamp operated by a control signal of the microcomputer for self-diagnosis of the infrared and ultraviolet detecting sensors; Fire detection system characterized in that it further comprises.

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