KR20170133982A - Apparatus for broadcasting using fm frequency bandwidth of leakage coaxial cable - Google Patents

Abstract

An emergency broadcasting apparatus using the FM frequency bandwidth of a leakage coaxial cable is provided. The emergency broadcasting apparatus includes an FM receiving part for receiving broadcast data output from a station room terminal or a railway line telephone as public address system to an intra tunnel with the FM frequency bandwidth of a leakage coaxial cable, a signal regulation part for regulating the waveform, bandwidth and voltage of the received public address system, and an output part for amplifying and outputting the public address adjusted from the signal control part. The emergency broadcasting apparatus allows workers and passengers to be aware of an emergency.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an emergency broadcasting apparatus using an FM frequency band of a leaky coaxial cable,

The present invention relates to an emergency broadcasting apparatus using an FM frequency band of a leaky coaxial cable, and more particularly, to an apparatus capable of emergency broadcasting in a tunnel using an FM frequency band.

In recent years, a lot of fire and explosion events have been taking place, and subway stations have been using alternate speakers to broadcast emergency situations. However, there is still no system for emergency broadcasting in an emergency situation.

At this time, a method of broadcasting underground is performed by installing a general repeater in an underground wireless network. In this regard, the prior art Korean Patent Publication No. 2011-0052893 (published on May 19, 2011) simplifies a system for mediating a radio wave-blocking area and a radio-wave area such as tunnels, mines, underground shopping malls, Thereby reducing the number of transmission / reception antennas and repeaters, and transmitting emergency broadcasts to all media and managing the broadcasts through a single remote management server.

However, since the general repeater needs to be installed in the basement through the wireless network, the system construction cost is high, but the efficiency and effectiveness of the repeater are questioned because the underground shaded area still exists. Accordingly, It is urgent to construct a system that can be used in addition to the installed speakers.

An embodiment of the present invention uses a radio frequency band of underground rebroadcasting and uses a leakage coaxial cable that is an existing infrastructure to efficiently remove a service shadow area with a low cost and manpower and provide it efficiently at an emergency broadcast The system can be designed so that the emergency broadcasting can reach all the areas, so that even if the shadow area occurs, the emergency broadcasting device using the FM frequency band of the leakage coaxial cable, in which workers and passengers in the tunnel or station can recognize the emergency situation Can be provided. It should be understood, however, that the technical scope of the present invention is not limited to the above-described technical problems, and other technical problems may exist.

According to an aspect of the present invention, there is provided a method for transmitting broadcast data output from a public switched telephone network or a public switched telephone network to a public switched telephone network using a Leakage Coaxial Cable An FM receiver for receiving the frequency band, a signal controller for adjusting the waveform, band and voltage of the received tuner, and an output unit for amplifying and outputting the tuner broadcast adjusted from the signal controller.

According to any one of the above-mentioned objects of the present invention, by using the radio FM band of underground rebroadcasting and using the leakage coaxial cable as the existing infrastructure, the service shadow area is removed with low cost and manpower, The system can be designed so that emergency broadcasting can reach all areas, so that workers and passengers in a tunnel or a station can recognize an emergency even if a shadow area occurs.

1 is a block diagram illustrating an emergency broadcasting system according to an embodiment of the present invention.
FIG. 2 is a block diagram illustrating the emergency broadcasting apparatus shown in FIG. 1. Referring to FIG.
FIG. 3 is a view for explaining an embodiment in which the emergency broadcasting system shown in FIG. 1 is implemented.
FIG. 4 is a diagram for explaining an embodiment in which the emergency broadcasting system shown in FIG. 1 is implemented.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, which will be readily apparent to those skilled in the art. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and similar parts are denoted by like reference characters throughout the specification.

Throughout the specification, when a part is referred to as being "connected" to another part, it includes not only "directly connected" but also "electrically connected" with another part in between . Also, when an element is referred to as "including" an element, it is to be understood that the element may include other elements as well as other elements, And does not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof.

The terms "about "," substantially ", etc. used to the extent that they are used throughout the specification are used in their numerical value or in close proximity to their numerical values when the manufacturing and material tolerances inherent in the stated meanings are presented, Accurate or absolute numbers are used to help prevent unauthorized exploitation by unauthorized intruders of the referenced disclosure. The word " step (or step) "or" step "does not mean" step for. &Quot;

In this specification, the term " part " includes a unit realized by hardware, a unit realized by software, and a unit realized by using both. Further, one unit may be implemented using two or more hardware, or two or more units may be implemented by one hardware.

In this specification, some of the operations or functions described as being performed by a terminal, a device, or a device may be performed instead in a server connected to the terminal, device, or device. Likewise, some of the operations or functions described as being performed by the server may also be performed in a terminal, device or device connected to the server.

In this specification, some of the operations or functions described in the mapping or matching with the terminal are mapping or matching the unique number of the terminal, which is the identification data of the terminal, or the identification information of the individual . ≪ / RTI >

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram illustrating an emergency broadcasting system according to an embodiment of the present invention. Referring to FIG. 1, the emergency broadcasting system 1 may include an emergency broadcasting apparatus 100, a railway line telephone 300, and a stationary workstation terminal 400. However, since the emergency broadcasting system 1 of FIG. 1 is only an embodiment of the present invention, the present invention is not limited to FIG.

At this time, the respective components of FIG. 1 are generally connected through a network 200. For example, as shown in FIG. 1, the emergency broadcasting apparatus 100 may be connected to the railway line telephone 300 through the network 200. In addition, the emergency broadcasting apparatus 100 can be connected to the stationery terminal 400 through the network 200. [ The railway line telephone 300 may be connected to the emergency broadcasting apparatus 100 and the stationery terminal 400 through the network 200. [ In addition, the workstation terminal 400 may be connected to the emergency broadcasting apparatus 100 and the railway line telephone 300 through the network 200. [

Here, the network 200 refers to a connection structure capable of exchanging information between nodes such as a plurality of terminals and servers. One example of such a network 200 is a 3rd Generation Partnership Project (3GPP) network, A 5th Generation Partnership Project (5GPP) network, a World Interoperability for Microwave Access (WIMAX) network, an Internet, a LAN (Local Area Network), a Wireless LAN (Local Area Network) But are not limited to, a Wide Area Network (PAN), a Personal Area Network (PAN), a Bluetooth network, a satellite broadcast network, an analog broadcast network, a Digital Multimedia Broadcasting (DMB) network, The emergency broadcasting apparatus 100, the railway line telephone 300, and the workstation terminal 400 shown in FIG. 1 are not limited to those shown in FIG.

The emergency broadcasting apparatus 100 may be a device that performs subway broadcasting using the FM frequency band. At this time, the emergency broadcasting apparatus 100 may be a device using an FM frequency band of a leakage coaxial cable. Further, the emergency broadcasting apparatus 100 may be a device that is installed at a plurality of specific intervals in the tunnel using a specific radio FM frequency used in the subway, and performs broadcasting. Emergency broadcasting apparatus 100 may be an apparatus that broadcasts by using underground rebroadcast, because it may be difficult to set up a network for broadcasting owing to a condition of an emergency, or an emergency, when an accident occurs.

The railway line telephone 300 may be a telephone set installed in a train or a subway tunnel every predetermined interval and connected to the history. Further, it may be a telephone used for exchanging necessary information in case of an accident in a railway line telephone 300, a railway repair work, a railroad, an emergency situation in a tunnel, or the like. The railway line telephone 300 may be connected by a plurality of strands of telephone cables and may be connected by a plurality of lines, which may be used to enable communication at a plurality of places. In addition, the railway line telephone 300 is installed in a place such as near the main circulation room and the drain pump room, near the main line shelter, near the main line branch, etc., at an average interval of 200 to 300 m in the main line section, Lt; / RTI > In addition, the railway line telephone 300 may be a telephone set connected to an interphone to a designated place in an emergency. In addition, the railway line telephone 300 may be a device capable of transmitting broadcast data to the emergency broadcasting apparatus 100. For this purpose, the railway wire telephone 300 may be a device for transmitting broadcast data to the emergency broadcasting apparatus 100 using an FM frequency band using a leaky coaxial cable.

The station room terminal 400 may be a station room terminal or may include all terminals capable of being connected to the emergency broadcasting apparatus 100. At this time, the station room terminal 400 may be informed of the dangerous situation. At this time, the workstation terminal 400 may receive a unique identification number or location information transmitted by voice or data, or may be a terminal that outputs images photographed from a camera (not shown) installed in a railway or tunnel .

 Here, the workstation terminal 400 may be implemented as a computer capable of connecting to a remote server or terminal through the network 200. [ Here, the computer may include, for example, a notebook, a desktop, a laptop, and the like on which a WEB browser is installed. In addition, the workstation terminal 400 may be implemented as a terminal capable of connecting to a remote server or terminal through the network 200. [ The workstation terminal 400 is a wireless communication device that is guaranteed to be portable and mobility, for example, a Personal Communication System (PCS), a Global System for Mobile communications (GSM), a Personal Digital Cellular (PDC) ), A PDA (Personal Digital Assistant), IMT (International Mobile Telecommunication) -2000, Code Division Multiple Access (CDMA) -2000, W-CDMA (W-Code Division Multiple Access), Wibro (Wireless Broadband Internet) based wireless communication device, such as a smartphone, a smartpad, a tablet PC, and the like.

FIG. 2 is a block diagram for explaining the emergency broadcasting apparatus shown in FIG. 1, and FIG. 3 is a view for explaining an embodiment in which the emergency broadcasting system shown in FIG. 1 is implemented.

2, the emergency broadcasting apparatus 100 may include an FM receiving unit 110, a signal adjusting unit 130, and an output unit 150.

The emergency broadcasting apparatus 100 according to an embodiment of the present invention or another server (not shown) operating in conjunction with the emergency broadcasting apparatus 100 may be connected to an administrator terminal (not shown) ), An administrator terminal or a stationery terminal 400 that manages an emergency broadcasting application, a program, an app page, a web page, and the like may be installed or opened. In addition, the service program may be executed in the manager terminal or the workstation terminal 400 using a script executed in the web browser. Here, a web browser is a program that enables a WWW (World Wide Web) service, and is a program for receiving and displaying hypertext described in hypertext mark-up language (HTML), for example, Netscape (Netscape) An Explorer, chrome, and the like. Further, the application refers to an application on the terminal, for example, an app (app) running on a mobile terminal (smart phone).

At this time, the connection of the network 200 is performed by connecting the emergency broadcast apparatus 100, the railway line phone 300, and the stationary workstation 400 to a communication terminal through a communication object for communication with the terminal connected to the network 200 . The emergency broadcasting apparatus 100 can exchange data with each other through a communication object.

The FM receiving unit 110 can receive the broadcast data output from the NOC terminal 400 or the railway line telephone 300 through the in-zone tunnels in the FM frequency band of the Leakage Coaxial Cable . At this time, the leaky coaxial cable is a coaxial cable in which a signal being transmitted is a leaked radio wave and radiated to the surroundings, and can be used for wireless communication in a tunnel. At this time, the FM receiving unit 110 may be implemented as a digital tuner that receives the FM frequency band of public address broadcasting. The digital tuner is a device that can select a frequency by a button or a dial while looking at the number displayed on the screen, and can be a device that can find a desired frequency more easily and quickly than an analog tuner. Thus, the FM specific frequency band can be precisely received with high sensitivity.

The signal conditioning unit 130 can adjust the waveform, band, and voltage of the received public address broadcast. At this time, the signal controller 130 may include a waveform remover 131, a band remover 133, and a voltage regulator 135. At this time, the waveform remover 131 can compare and detect a predetermined waveform of the first frequency or higher in conjunction with the bridge circuit 157 (bridge circuit) of the output unit 150, and the band eliminator 133 can remove And the band eliminator 131 can remove the band below the second frequency of the all-tube broadcast output through the band eliminator 131 and the voltage regulator 135 can eliminate the band- Can be adjusted.

At this time, the waveform remover 131 includes a limit circuit for removing a predetermined waveform of 20 KHz or more, the band remover 133 is a crossover filter, and the voltage regulator 135 is a crossover filter The frequency band of the filtered voltage broadcast can be adjusted to 0 dB.

Here, the waveform remover 131 applies a repeating circuit for removing a specific waveform of 20 KHz or more, and at the same time works with the bridge circuit 157 to compare and detect specific waveforms. In this case, the limit circuit is used for limiting the waveform. In the case of a limit circuit by a diode, the limit circuit controls the current flowing through the diode, and in this case, flows only when the voltage is higher than a predetermined voltage, Is limited. The waveform remover 131 also performs a comparative role in conjunction with the bridge circuit 157, which is a type of electrical circuit in which the current is separated into electrical conductors connected in parallel and rejoined to the surrounding conductor Bridge circuits are typically used for measurement purposes, but they can also be used in power supplies. In a power supply design, a bridge circuit or a bridge rectifier is an array of diodes or similar devices that is used to rectify an uncertain voltage or AC voltage to a DC voltage Can be used. Thereby detecting and removing a specific waveform.

The band eliminator 133 may be a crossover filter. The band of the frequency band coming from the crossover filter is 35 Hz to 20 kHz, and the frequency band of 630 Hz or less is removed to perform filtering so that it can be clearly heard even in the underground tunnel.

The voltage regulator 135 can fine-tune the 630 Hz to 20 kHz band coming from the crossover filter to the voltage regulator 135 to 0 dB, i.e., 0.775 V to 1.2 V. Here, the waveform remover 131 and the voltage regulator 135 may be configured as a preamplifier.

The output unit 150 may amplify and output the tuned broadcasting signal adjusted by the signal adjusting unit 130. At this time, the output unit 150 may include a bridge circuit 157, a first power amplifier 153 and a second power amplifier 155, and a supergain speaker 159.

The first power amplifier 153 and the second power amplifier 155 are connected to the bridge circuit 157 interlocked with the waveform remover 131 included in the signal controller 130, Directional speaker 159 is connected to the bridge circuit 157 and is configured to output an emergency broadcast. Here, the supergain loudspeaker 159 may be formed in a cylindrical shape so that the sound range varies depending on the position of the circumference of the sounding plate.

Here, the first power amplifier 153 and the second power amplifier 155 can output a maximum operating current of 0.4 A on the basis of 50 watts (W) using the bridge circuit 157.

The output unit 150 may further include a preamplifier 151 positioned between the output of the signal conditioning unit 130 and the input of the first power amplifier 153 and the second power amplifier 155 . The first and second ends of the bridge circuit 157 are respectively connected to the outputs of the first and second power amplifiers 153 and 155 and the input of the supergain speaker 159, 157 may be connected to the input of the waveform remover 131 of the signal conditioning unit 130. [

The emergency broadcast system of FIGS. 2 and 3 can be easily deduced from the same or the same contents as those of the emergency broadcast system described above with reference to FIG. 1, and therefore the description thereof will be omitted.

FIG. 4 is a diagram for explaining an embodiment in which the emergency broadcasting system shown in FIG. 1 is implemented.

The emergency broadcasting system 1 according to an embodiment of the present invention may be configured as shown in FIG. However, the present invention is not limited to the configuration shown in Fig.

First, the emergency broadcasting apparatus 100 receives the emergency radio broadcast of the FM emergency broadcast apparatus received through the radio transmission facility and the underground rebroadcast through the radio command band through the leakage coaxial cable.

At this time, the emergency broadcast transmitted from the transceiver can be transmitted through the leakage coaxial cable, the leakage coaxial cable allows the emergency broadcast transmitted from the transceiver to be transmitted to the emergency broadcast apparatus 100 (FM send receiver), and the emergency broadcast apparatus 100 Is broadcasted through the super directional speaker through the operation of the above-described structure and configuration.

At this time, any device that communicates using the FM frequency band regardless of the source of the radio command band, the FM emergency broadcast device, or the like can be configured to be capable of emergency broadcasting through the emergency broadcasting device 100 . However, since the emergency broadcast must be used only in an urgent situation (or all the broadcasts using the emergency broadcast apparatus 100), the emergency broadcast apparatus 100 may perform a tagging or a header Header), it may be broadcasted. That is, the emergency broadcasting apparatus 100 may store a predetermined identifier, and may be triggered to be broadcast only when the corresponding identifier is tagged in the received broadcast data or inserted in the header. At this time, the authenticated terminal may be the terminal shown in FIG. 4, and may further include a railway line telephone 300. In addition, any of broadcast data having a header and an identifier inserted therein may be available. That is, the terminal shown in FIG. 4 may be programmed to insert an identifier for authentication itself into broadcast data, and the other terminals may insert an identifier for authentication in a header or tag .

The matters not described with respect to the emergency broadcasting system of FIG. 4 can be easily deduced from the same or explained contents of the emergency broadcasting system through FIGS. 1 to 3, and the description thereof will be omitted.

The emergency broadcasting system according to the embodiment described with reference to Figs. 1 to 4 may also be embodied in the form of a recording medium including instructions executable by a computer, such as an application programmed by a computer or a program module. Computer readable media can be any available media that can be accessed by a computer and includes both volatile and nonvolatile media, removable and non-removable media. In addition, the computer-readable medium may include both computer storage media and communication media. Computer storage media includes both volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data. Communication media typically includes any information delivery media, including computer readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave, or other transport mechanism.

The emergency broadcasting system according to an embodiment of the present invention may be executed by an application installed in a terminal (which may include a program included in a platform or an operating system basically installed in the terminal) (I.e., a program) installed directly on the master terminal through an application providing server such as an application store server, an application, or a web server associated with the service. In this regard, the above-described emergency broadcasting method according to an embodiment of the present invention is implemented as an application program (i.e., a program) installed in a terminal or directly installed by a user and stored in a computer-readable recording medium Lt; / RTI >

It will be understood by those skilled in the art that the foregoing description of the present invention is for illustrative purposes only and that those of ordinary skill in the art can readily understand that various changes and modifications may be made without departing from the spirit or essential characteristics of the present invention. will be. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. For example, each component described as a single entity may be distributed and implemented, and components described as being distributed may also be implemented in a combined form.

The scope of the present invention is defined by the appended claims rather than the detailed description and all changes or modifications derived from the meaning and scope of the claims and their equivalents are to be construed as being included within the scope of the present invention do.

Claims (7)

In the emergency broadcasting apparatus,
An FM receiving unit for receiving broadcast data output from a station room terminal or a railway line telephone through a local frequency band of a Leakage Coaxial Cable;
A signal controller for adjusting a waveform, a band, and a voltage of the received public address broadcast; And
And an output unit for amplifying and outputting the all-around broadcast adjusted from the signal control unit,
And an emergency broadcast apparatus.
The method according to claim 1,
Wherein the FM receiver is a digital tuner that receives the FM frequency band of the public address broadcast.
The method according to claim 1,
The signal regulator includes:
A waveform eliminator for comparing and detecting a predetermined waveform of the first frequency or higher in association with a bridge circuit of the output unit;
A band eliminator for removing a band below a second frequency of the all-tube broadcast output through the waveform remover; And
A voltage regulator for adjusting a voltage of the all-tube broadcast filtered through the band eliminator to a preset voltage;
And an emergency broadcast apparatus.
The method of claim 3,
Wherein the waveform remover includes a limit circuit for removing a predetermined waveform of 20 KHz or more,
Wherein the band eliminator is a crossover filter,
Wherein the voltage regulator adjusts the frequency band of the filtered voltage broadcast from the crossover filter to 0 dB.
The method according to claim 1,
The output unit includes:
Bridge circuit;
A first power amplifier and a second power amplifier connected to a bridge circuit interlocked with the waveform remover included in the signal regulator and increasing an operation current based on a predetermined power;
A super directional speaker connected to the bridge circuit;
Lt; / RTI >
Wherein the supergain loudspeaker is formed into a cylindrical shape so that the sound range is different according to the position of the circumference of the sounding plate.
6. The method of claim 5,
Wherein the first power amplifier and the second power amplifier output a maximum operating current of 0.4 A on a basis of 50 watts [W] using the bridge circuit.
6. The method of claim 5,
Wherein the output section includes: a preamplifier positioned between an output of the signal conditioning section and an input of the first power amplifier and the second power amplifier;
Further comprising:
The first stage and the second stage of the bridge circuit are connected to the outputs of the first power amplifier and the second power amplifier and the inputs of the supergain speaker respectively and the third stage of the bridge circuit is connected to the waveform eliminator Is connected to an input of an emergency broadcast device.

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