KR20010086709A - An apparatus for monitoring a fire - Google Patents

Abstract

PURPOSE: A fire monitoring system is provided to display the scene of fire in a monitor by taking a picture when the fire broke out, so that a keeper grasps the situation easily and the confidence in the system is improved. CONSTITUTION: The fire monitoring system includes a fire sensing device(10) and a central monitoring device(30). The fire sensing device(10) is composed of many instruments. A fire center(11) outputs the fire sensing signal and a camera(12) outputs the analog image signal and a switching portion(13) is turned on by the fire signal. An A/D converter(14) converts the analog image signal into the digital image signal and a temporary memory(15) stores the digital image data as a frame unit and a press managing portion(16) presses and outputs the digital image signal. A memory(17) for pressing and storing stores the digital image signal and the first control portion(18) controls each portion and outputs the specific address signal and the fire signal when the fire signal is input from the fire center(11). A serial interface(19) outputs the digital image signal in series and a power line modulating portion(20) modulates the power line for transmitting the address signal, the fire signal and the digital image signal to the central monitoring device(30).

Description

Fire monitoring system {An apparatus for monitoring a fire}

The present invention relates to a fire monitoring system.

In more detail, when a fire occurs, the fire detection system captures the scene of the fire with a camera and transmits the signal along with a unique address signal. will be.

FIG. 1 is a block diagram illustrating a general fire monitoring system. As shown in FIG. 1, a general fire monitoring system includes a plurality of fire detection devices 10 located in a region and a central monitoring device 30 located in a center. It is composed.

Accordingly, when a fire occurs in an area where the fire detection device 10 is installed, the fire detection device 10 transmits a fire detection signal and a unique address signal to the central monitoring device 30, and the central monitoring device 30 fires. By displaying the fire detection signal and the unique address signal received from the detection device 10 on the monitor, it is to inform the administrator.

However, the recent rapid proliferation of electronic, electrical, and communication systems frequently causes malfunctions of fire detection devices due to electromagnetic interference, which not only lowers the reliability of the system, but also causes fire and loss of life and property. There was a problem that can cause a great loss.

Accordingly, an object of the present invention is to provide a fire monitoring system designed to display a monitor by photographing a fire scene with a camera when a fire occurs.

The system according to the present invention for achieving the above object, a plurality of fire detection device for imaging the scene of the fire with a camera signal processing the image signal captured and transmitted to the outside with a unique address signal; And a central monitoring device for displaying image signals and address signals received from the plurality of fire detection devices on a monitor.

1 is a block diagram schematically showing a fire monitoring system according to the present invention;

Figure 2 is a block diagram showing in detail the fire detection apparatus of the fire monitoring system according to the present invention,

3 is a block diagram showing in detail the central monitoring device of the fire monitoring system according to the present invention;

4 is a screen configuration diagram displayed on the monitor according to the present invention.

* Names of symbols for main parts of the drawings

10: fire detection device 30: central monitoring device

11: fire sensor 12: camera

13: switching unit 14: A / D converter

15 temporary memory 16 compression processing unit

17: compression storage memory 18: first control unit

19: serial interface 20: power line modulator

21: error encoding unit 31: power line demodulation unit

32: decompression unit 33: D / A converter

34: TV signal conversion unit 35: second control unit

36: monitor 37: warning sound generator

38: error decoding unit

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram schematically showing a fire monitoring system according to the present invention, Figure 2 is a block diagram showing a fire detection device of the fire monitoring system according to the present invention in detail, Figure 3 is a fire according to the present invention A block diagram showing in detail the central monitoring unit of the monitoring system.

As shown in FIG. 1, a system according to the present invention includes a plurality of fire detection apparatuses 10 which image a fire scene with a camera 12, and process the captured image signal to be transmitted to the outside together with a unique address signal. ; The central monitoring device 30 for displaying the video signal and the address signal received from the plurality of fire detection device 10 on the monitor 36.

Wherein the fire detection device 10, as shown in Figure 2, when the fire is detected a fire sensor 11 for outputting a fire detection signal; A camera 12 for capturing a fire scene and outputting an analog video signal; A switching unit 13 switched on by the fire detection signal; An A / D converter 14 for converting an analog video signal input from the camera 12 through the switching unit 13 into a digital video signal and outputting the digital video signal; A temporary memory 15 storing digital image data input from the A / D converter 14 in a frame unit; A compression processor 16 for compressing and outputting the digital video signal read out from the temporary memory 15; A compression storage memory (17) for storing a digital video signal input from the compression processor (16); A first control unit 18 controlling each unit and outputting a unique address signal and a fire detection signal when a fire detection signal is input from the fire sensor 11; A serial interface (19) for serially outputting an address signal, a fire detection signal input from the first control unit (18), and a digital video signal read out from the compression storage memory (17) one bit at a time; The power line modulator 20 includes an address signal, a fire detection signal, and a digital video signal inputted from the serial interface 17 to be power line modulated to be transmitted to the central monitoring apparatus 30 by being loaded on the power line.

In addition, as shown in FIG. 3, the central monitoring apparatus 30 includes a power line demodulator for demodulating and outputting an address signal, a fire detection signal, and a digital video signal transmitted from the power line modulator 20 through a power line ( 31); A compression restoring unit (32) for restoring and outputting a compressed digital video signal input from the power line demodulation unit (31); A D / A converter 33 for converting the digital video signal input from the compression recovery unit 32 into an analog video signal and outputting the analog video signal; A television signal converter 34 for converting the analog video signal inputted to the D / A converter 33 into a television signal and outputting the television signal; A second control unit which controls each unit and outputs a first control signal according to a fire detection signal input from the power line demodulator 31 and outputs a second control signal according to an address signal input from the power line demodulator 31. (35); Fire occurs by the first display unit 36-1 displaying the fire occurrence state by the first control signal input from the second control unit 35 and by the second control signal input by the second control unit 35. A monitor 36 comprising a second display portion 36-2 for displaying an area and a third display portion 36-3 for displaying a video signal input from the television signal conversion portion 34; It consists of a warning sound generating unit 37 for generating a warning sound by the second control signal input from the second control unit 35.

Next, the operation of the system according to the present invention will be described in detail with reference to FIG. 4.

4 is a screen configuration diagram displayed on the monitor according to the present invention.

For example, when a fire occurs in the first area, the fire sensor 11 of the fire detection device 10 located in the first area detects it and outputs a fire detection signal to the switching unit 12. The unit 13 is switched on.

At this time, the camera 12 captures a fire scene and outputs an analog video signal to the A / D converter 14 through the switching unit 13, and the A / D converter 14 is input from the camera 12. The analog video signal is converted into a digital video signal and then output. The digital video signal output from the A / D converter 14 is stored in the temporary memory 15 in units of frames.

Accordingly, the compression processor 16 compresses and outputs a digital video signal read out from the temporary memory 15, and stores the compressed digital video signal output from the compression processor 16 in the compression storage memory 17. do.

The compression processor 17 compresses the digital video signal read out from the temporary memory 15 using the Joint Photographic Coding Experts Group (JPEG) method or the Wavelet method.

Accordingly, when the fire detection signal is input from the fire sensor 11, the first control unit 18 for controlling each part of the fire detection device 10 outputs a unique address signal and a fire detection signal to the serial interface 19. The serial interface 19 is a power line modulator 20 in which the address signal inputted from the first control unit 18, the fire detection signal, and the digital image signal read out from the compression storage memory 17 are serially transmitted by 1 bit. )

Here, the serial interface 19 generally uses RS-232C.

The power line modulator 20 transmits the address signal, the fire detection signal, and the digital video signal input from the serial interface 19 to the power line demodulator 31 of the central monitoring device 30 after the power line modulation. .

Here, the power line modulator 20 performs power line modulation on an address signal, a fire detection signal, and a digital video signal input from the serial interface 19 using a frequency shift keying (FSK) method or a power line modulation using a spectrum spread method. do.

The power line modulator 20 and the power line demodulator 31 transmit and receive a large amount of video signals efficiently and without errors through a 24 Vac power line.

Here, each fire detection device 10 has a unique address set so that the central monitoring device 30 transmits the unique address signal to the central monitoring device 30 together with the fire detection signal and the digital video signal when a fire occurs. Make it possible to identify the area where the fire occurred.

Accordingly, the power line demodulator 31 of the central monitoring device 30 demodulates the fire detection signal, the address signal, and the digital image signal transmitted from the power line modulator 20 through the power line to the compression recovery unit 32. The decompression unit 31 restores the compressed digital video signal input from the power line demodulator 31 and outputs the decompressed digital video signal to the D / A converter 33.

The D / A converter 33 converts the digital video signal input from the decompression unit 32 into an analog video signal and outputs the analog video signal to the television signal converter 34. The television signal converter 34 is a D / A converter. The analog video signal input from the A converter 33 is converted into a television signal and output to the third display unit 36-3 of the monitor 36.

The television signal converter 36 converts an analog video signal input from the D / A converter 33 into a television signal using the NTSC method or a television signal using the PAL method.

In addition, the second control unit 35 that controls each unit of the central monitoring device 30 controls the first control signal by the fire detection signal input from the power line demodulator 31 to display the first display unit 36 of the monitor 36. -1), and outputs a second control signal to the second display unit 36-2 and the warning sound generating unit 37 of the monitor 36 by the address signal inputted from the power line demodulator 31. .

Accordingly, as shown in FIG. 3, the first display unit 36-1 of the monitor 36 displays the fire occurrence state by the first control signal input from the second control unit 35, and the second display unit 36-1 displays the fire occurrence state. The display unit 36-2 displays a fire occurrence region by a second control signal input from the second control unit 35, and the third display unit 36-3 displays an image input from the D / A converter 33. Display the signal.

In addition, the warning sound generating unit 37 generates a warning sound by the second control signal input from the second control unit 35.

As a result, the warning sound generating unit 37 emits a warning sound, the first display unit 36-1 lights up, the first region of the second display unit 36-2 lights up, and the third display unit 36- 3) The fire scene is displayed, so that the administrator can easily grasp the fire situation.

In addition, the fire sensor 11 may be implemented as a thermal fire sensor for significantly detecting the heat generated by the fire or a smoke-type fire sensor for detecting the smoke generated by the fire.

Generally, the thermal fire sensor includes a bimetal type, a thermal semiconductor type, a thermocouple type, and the smoke type fire sensor includes a photoelectric type, an ionizing type, an infrared type type, an ultraviolet type type, and the like.

The photoelectric fire sensor outputs a fire detection signal when the light emitted from the light emitting device is scattered by the smoke and the light receiving device receives the scattered light, and the thermal fire sensor has a thermistor whose impedance varies according to temperature change. It detects impedance and outputs fire detection signal.

In addition, in order to detect and correct a communication error between the fire detection device 10 and the central monitoring unit 30, the error detection unit 21 is provided in the fire detection device 10 and the error monitoring unit 30 is in error decoding. When the error encoding unit 21 adds a cyclic redundancy check (CRC) error bit to the digital video signal, the error decoding unit 38 detects the CRC error bit to determine whether an error has occurred. To judge. At this time, if it is determined that an error has occurred, request for retransmission to the fire detection device (10).

As described above, in the present invention, when a fire occurs, the fire detection apparatus 10 captures a fire scene with a camera 12 and transmits the signal along with a unique address signal. By displaying the transmitted unique address signal and the video signal on the monitor 36, the administrator can easily grasp the fire situation, thereby improving the reliability of the system.

Claims (5)

A plurality of fire detection apparatuses (10) for imaging a scene of a fire by the camera (12) and processing the captured image signal to be transmitted to the outside together with a unique address signal; Fire monitoring system, characterized in that consisting of a central monitoring device (30) for displaying on the monitor (24) the image signal and the address signal received from the plurality of fire detection device (10). According to claim 1, wherein the fire detection device 10, A fire sensor 11 outputting a fire detection signal when a fire is detected; A camera 12 for capturing a fire scene and outputting an analog video signal; A switching unit 13 switched on by the fire detection signal; An A / D converter 14 for converting an analog video signal input from the camera 12 through the switching unit 13 into a digital video signal and outputting the digital video signal; A temporary memory 15 storing digital image data input from the A / D converter 14 in a frame unit; A compression processor 16 for compressing and outputting the digital video signal read out from the temporary memory 15; A compression storage memory (17) for storing a digital video signal input from the compression processor (16); A first control unit 18 controlling each unit and outputting a unique address signal and a fire detection signal when a fire detection signal is input from the fire sensor 11; A serial interface (19) for serially outputting an address signal, a fire detection signal, input from the first control unit (18), and a digital video signal read out from the compression storage memory (17) by 1 bit; Fire monitoring, characterized in that consisting of a power line modulator 20 for power line modulated to transmit the address signal, the fire detection signal and the digital video signal input from the serial interface 17 to the central monitoring device (30) on a power line system. The central monitoring device 30 according to claim 2, A power line demodulator (31) for demodulating and outputting an address signal, a fire detection signal, and a digital video signal transmitted from the power line modulator (20) through a power line; A compression restoring unit (32) for restoring and outputting a compressed digital video signal input from the power line demodulation unit (31); A D / A converter 33 for converting the digital video signal input from the compression recovery unit 32 into an analog video signal and outputting the analog video signal; A television signal converter 34 for converting the analog video signal inputted to the D / A converter 33 into a television signal and outputting the television signal; A second control unit which controls each unit and outputs a first control signal according to a fire detection signal input from the power line demodulator 31 and outputs a second control signal according to an address signal input from the power line demodulator 31. (35); Fire occurs by the first display unit 36-1 displaying the fire occurrence state by the first control signal input from the second control unit 35 and by the second control signal input by the second control unit 35. A monitor 36 comprising a second display portion 36-2 for displaying an area and a third display portion 36-3 for displaying a video signal input from the television signal conversion portion 34; Fire alarm system, characterized in that consisting of a warning sound generating unit (37) for generating a warning sound by the second control signal input from the second control unit (35). The method of claim 2 wherein the fire sensor 11, A fire monitoring system comprising a photoelectric fire sensor that outputs a fire detection signal when light emitted from a light emitting element is scattered by smoke and the light receiving element receives scattered light. The method of claim 2 wherein the fire sensor 11, Fire monitoring system, characterized in that the thermal fire sensor for outputting a fire detection signal by detecting the impedance from the thermistor whose impedance varies with temperature change.