KR101683417B1 - Public address system and method for check in public address system - Google Patents

Abstract

The present invention relates to a public address system and a method for checking the public address system. The public address system can detect a broken speaker or line among a plurality of speakers, which forms the public address system outputting a public address to several areas, and lines connecting the speakers, and control output levels of the speakers remotely.

Description

[0001] The present invention relates to a public address system and method for checking public address systems,

More particularly, the present invention relates to a method and apparatus for detecting the presence or absence of an abnormality in a line or a speaker of a line or a speaker of a public address system, The present invention relates to a public address system and a public address system check method capable of remotely controlling the public address system.

Generally, public address broadcasting system is a system designed to perform broadcasting for a whole area, a floor, and a district in a desired area in a single building or a neighboring building such as a school, an enterprise, a building, an apartment, or a hotel.

Such a public address broadcasting system has a transmitting apparatus installed in a central broadcasting room, and a receiving apparatus including a liquid crystal or a speaker is installed in a broadcasting reception room such as a conference room, a classroom or a room, .

The Public Address System is very useful when conducting tests inside the school, informing at hospitals and marts, and informing the companies of the messages. In addition, the importance of emergency broadcasting is very high because it can minimize the loss of life in case of fire or terrorism.

In a public address system, a plurality of loudspeakers are installed in various areas where all-out broadcasts are output, and these loudspeakers are connected through a line. In the case where an error occurs in some speakers or some lines, a public address may not be output.

In the case where a problem occurs in the public address system, at least two or more persons must be input to find the problematic part, and it is difficult to detect which part of the plurality of speakers and the line has a problem.

Therefore, there is a need for a method for detecting a problematic portion with a small number of personnel.

The main object of the present invention is to detect a speaker or a line in which a failure has occurred among a plurality of speakers constituting a public address broadcasting system for outputting a public address in a plurality of zones and lines connecting the speakers, And to provide a method for checking all-over-the-air broadcasting systems.

A public address broadcasting system according to an embodiment of the present invention is a public address broadcasting system capable of outputting public address broadcasts to a plurality of broadcast output areas, comprising: a broadcast output unit comprising a plurality of speakers installed in each of the broadcast output zones; A main broadcasting unit for transmitting the public address broadcast to the broadcast output unit; And a mobile terminal for communicating with the main broadcasting unit and sensing sound output from the speaker; Wherein the main broadcasting unit discriminates an abnormality on the broadcasting circuit by impedance of a broadcasting circuit composed of the main broadcasting unit, the broadcasting output unit, and the line connecting the main broadcasting unit and the broadcasting output unit, May measure the sound pressure of the sound output from the broadcast output unit and remotely control the main broadcast unit so that the measured sound pressure becomes a predetermined reference sound pressure.

In the present invention, the main broadcasting unit may include: a sound source reproducing unit for generating a sound source required for the public address broadcasting; An amplifier for amplifying the sound source reproduced by the sound source reproducer; A speaker selector for turning on and off the broadcasting output unit of the broadcasting output zone to output the amplified sound source; A main controller for controlling the main broadcast section or the broadcast output section and determining whether there is an abnormality on the broadcast circuit through an impedance of the broadcast circuit; A communication unit for transmitting and receiving data to and from the mobile terminal; . ≪ / RTI >

In the present invention, the main controller may include: an impedance calculating unit for calculating an impedance composite value of the broadcast circuit by summing the impedances of the speakers installed in the broadcast output zone; An impedance measuring unit for measuring an impedance of the speakers installed in the broadcast output zone by sending a current to the line to obtain impedance measurements of the broadcast circuit; And an abnormality determination unit for comparing the impedance composition value and the impedance measurement value to determine whether there is an abnormality on the broadcast circuit. . ≪ / RTI >

In the present invention, the abnormality determination unit compares the impedance composition value and the impedance measurement value, and when the difference between the impedance composition value and the impedance measurement value exceeds a predetermined range, .

In the present invention, the main broadcasting unit may further include a storage unit for storing the impedance composite value.

In the present invention, the main controller may further include an impedance search unit for searching whether the impedance composition value is stored in the storage unit, and the impedance search unit may be configured to determine whether the impedance composition value is stored in the storage unit before the impedance calculation unit calculates the impedance composition value. Wherein the impedance comparison unit does not calculate the impedance composite value when the impedance composite value is found and the impedance comparison unit does not calculate the impedance composite value stored in the impedance measurement unit, And the impedance composition value retrieved by the impedance retrieving unit to determine whether there is an abnormality on the broadcast circuit.

In the present invention, the mobile terminal includes: a microphone for sensing the sound output from the speaker and converting the sound into an electric signal; A communication unit for transmitting a test tone transmission request signal to the main broadcasting unit so that the main broadcasting unit outputs test tones to the speakers; And a control unit for generating the transmission request signal according to a user's input, comparing the measured sound pressure of the test tone monitored by the microphone with the reference sound pressure, and outputting, by the main broadcasting unit, A terminal control unit for generating a remote control signal for increasing or decreasing the sound pressure of the test tone; And the communication unit may transmit the remote control signal to the main broadcasting unit.

In the present invention, the terminal control unit controls the amplifier to increase the sound pressure of the test tone output from the broadcast output unit when the measured sound pressure is less than the reference sound pressure as a result of comparing the measured sound pressure and the reference sound pressure And controls the amplifier so that the sound pressure of the test tone output from the broadcast output unit decreases when the measured sound pressure exceeds the reference sound pressure as a result of comparing the measured sound pressure and the reference sound pressure And generate a second remote control signal.

In the present invention, the microphone may sense noise in the broadcast output area provided with the broadcast output unit according to the input of the user, the terminal control unit measures the sound pressure of the noise, It can be larger than the sound pressure.

In the present invention, the main broadcasting unit may control the input level of the amplifier so that the sound pressure of the test tone output from the broadcast output unit increases or decreases according to the remote control signal when the remote control signal is received .

In the present invention, when it is determined that the main broadcast section has an error on the broadcast circuit, the mobile terminal can detect the failure of the line or the speaker by sensing the sound output from each of the speakers have.

In the present invention, the terminal control unit may generate the test tone transmission request signal when it is determined by the main broadcasting unit that there is an abnormality on the broadcasting circuit, If it is determined that the test tone is not output from the n-th speaker, it is determined whether the test tone is generated by the n + 1-th speaker neighboring the n-th speaker, Tone, and if the test tone is output from the (n + 1) th speaker, it is determined that the n-th speaker is abnormal. If the test tone is not output from the (n + 1) it can be determined that there is an abnormality in the line between the (n-1) th speaker and the nth speaker.

If the test tone is output from the n-th speaker, the terminal control unit may detect whether a test tone is generated in the (n + 1) -th speaker adjacent to the n-th speaker, If the test tone is not output from the first speaker, it is detected whether the test tone is generated from the (n + 2) th speaker, and if the test tone is output from the (n + If the test tone is not output from the (n + 2) th speaker, it can be determined that there is an abnormality in the line between the nth speaker and the (n + 1) th speaker.

In the present invention, when the test tone in the first speaker with n = 1 is not detected, the terminal control unit determines that there is an abnormality in the line between the first speaker or the first speaker and the main broadcasting unit can do.

In the present invention, the terminal control unit may include: a signal generator for generating a test tone transmission control signal for causing the main broadcasting unit to output the test tone from the speaker installed in the broadcast output zone, according to the input of the user; A reference sound pressure setting unit for setting the reference sound pressure by an input of the user; A sound pressure measuring unit for measuring the sound pressure of the test tone by sensing the test tone generated by the microphone in the speaker; A sound pressure comparator that compares the measured sound pressure and the reference sound pressure and generates a remote control signal to increase or decrease a sound pressure of the test tone outputted from the broadcast output unit according to a result of the comparison; A test tone detector for determining whether the test tone is generated in the speaker according to whether the microphone senses the test tone generated in the speaker; And if the test tone does not occur in the nth speaker and the test tone does not occur in the (n + 1) th speaker, it is determined that the line between the (n-1) th speaker and the nth speaker is abnormal, If the test tone is not generated in the (n + 1) th speaker and the test tone occurs in the (n + 1) th speaker, it is determined that the n-th speaker is abnormal; . ≪ / RTI >

A method for checking a public address system according to an exemplary embodiment of the present invention is a public address system checking method capable of outputting a public address to a plurality of broadcast output zones, A broadcast output unit comprising a plurality of speakers installed in each of the output zones; A main broadcasting unit for transmitting the public address broadcast to the broadcast output unit; And a mobile terminal for communicating with the main broadcasting unit and sensing sound output from the speaker; Wherein the overall broadcasting system checking method comprises the steps of determining whether there is an abnormality on the broadcasting circuit through the impedance of the broadcasting circuit comprising the main broadcasting section, the broadcasting output section, and the line connecting the main broadcasting section and the broadcasting output section step; Determining which line or which speaker of the line or the plurality of speakers has a failure by sensing the sound output from each of the speakers; Measuring a sound pressure of the sound outputted from the broadcast output unit and setting an output level so that the measured sound pressure is a predetermined reference sound pressure when there is no abnormality on the broadcasting circuit; Lt; RTI ID = 0.0 >

In the present invention, the step of setting the output level may include: setting the reference sound pressure; Outputting a test tone from the speaker by remote control of the main broadcasting unit by the mobile terminal; Measuring a sound pressure of the test tone to set a measured sound pressure of the test tone; Comparing the reference sound pressure and the measured sound pressure; Generating a remote control signal for causing the main broadcasting unit to increase or decrease a sound pressure of the test tone outputted from the broadcast output unit according to the comparison result; And outputting the test tone whose sound pressure is increased or decreased according to the remote control signal; . ≪ / RTI >

According to an embodiment of the present invention, in a public address broadcasting system having a plurality of speakers and outputting a public address to a plurality of districts, a speaker or a line in which a fault has occurred can be detected from among the plurality of speakers and the lines connecting them have.

1 is a block diagram schematically showing a public address broadcasting system according to an embodiment of the present invention.
FIG. 2 is a block diagram schematically showing an embodiment of the main controller shown in FIG. 1. FIG.
3 is a block diagram schematically showing an embodiment of the mobile terminal shown in FIG.
4 is a block diagram schematically showing an embodiment of the terminal control unit shown in FIG.
FIG. 5 is a flowchart schematically illustrating a method for determining an error in a PBC system according to an exemplary embodiment of the present invention.
FIG. 6 is a flowchart schematically illustrating a method of determining whether a line or a speaker of a public address broadcast system shown in FIG. 5 has a failure.
FIG. 7 is a flowchart schematically showing a fault discrimination method including a volume control circuit in the method of discriminating whether a line or a speaker of the whole-body broadcasting system shown in FIG. 6 has a fault.
FIG. 8 is a flowchart schematically showing a method of setting an output level of the whole-body broadcast system shown in FIG.

While the present invention has been described in connection with certain exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and similarities. It should be understood, however, that the invention is not to be limited to the specific embodiments, but includes all changes, equivalents, and alternatives falling within the spirit and scope of the invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the following description of the present invention, detailed description of related arts will be omitted when it is determined that the gist of the present invention may be unnecessarily blurred. Also, numbers used in the description process of the present invention (e.g., first second, etc.) may be identifier signals for distinguishing one component from another.

Also, in this specification, when an element is referred to as being "connected" or "connected" with another element, the element may be directly connected or directly connected to the other element, May be connected or connected via another component in the middle, as long as there is no description to be made.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings.

FIG. 1 is a configuration diagram schematically showing a public address broadcasting system according to an embodiment of the present invention, FIG. 2 is a configuration diagram schematically showing an embodiment of the main controller shown in FIG. 1, 1 is a block diagram schematically showing an embodiment of a mobile terminal shown in FIG.

Referring to FIG. 1, a public address system 1000 according to an embodiment of the present invention may include a main broadcasting unit 100, a broadcasting output unit 200, and a mobile terminal 300.

The main broadcasting unit 100 may transmit the all-terrain broadcasting to the broadcasting output unit 200. [ The main broadcasting unit 100 reproduces and amplifies the sound sources necessary for the public hall broadcasting and transmits the amplified sound sources to the plurality of broadcasting output units 200 to transmit the public hall broadcasting to each of the broadcasting output areas installed in the broadcasting output unit 200 Can be controlled. That is, the main broadcasting unit 100 is connected to a broadcasting output unit 200 installed in a broadcasting output area divided into a plurality of zones or divided into a plurality of zones in a building, and transmits the overall broadcasting to the broadcasting output unit 200, The control unit 200 may control the broadcast output unit 200 to output the overall broadcast. The main broadcasting unit 100 can control to turn on / off the power of the speakers 210 constituting the broadcasting output unit 200 to output the all-terrain broadcasting only to a part of the plurality of broadcasting output areas.

Also, the main broadcasting unit 100 can determine whether or not there is an abnormality in the line connecting the speaker or the speaker by measuring the impedance of the speakers of the broadcast output unit 200. This will be described later.

1, the main broadcasting unit 100 includes a sound source playback unit 110, an amplifier 120, a speaker selector 130, a main controller 140, a communication unit 150, a storage unit 160, And an emergency panel 170, as shown in FIG.

The sound source playback unit 110 can generate a sound source required for all-over broadcast. The sound source playback unit 110 sends an analog signal such as a cassette tape or an LP (Longplayer record) or a digital signal such as mp3, WAV, FLAC, and CD to the main controller 140 to provide a sound source to the broadcast output unit 200 .

The amplifier 120 may amplify a sound source reproduced by the sound source reproducer 110.

The speaker selector 130 may turn on and off the broadcast output unit 200 of the broadcast output area to which the sound source is to be output, by amplifying the broadcast output unit 200 under the control of the main controller 140. [ The speaker selector 130 can arbitrarily adjust the broadcasting output area to transmit the desired broadcasting to the desired place such as the test broadcasting and the announcement broadcasting. For example, in a case where a public hall broadcast is output to the broadcast output zone A1 and no public hall broadcast is output to the broadcast output zone A2, the speaker selector 130 is connected to speakers installed in the broadcast output zone A1, And does not transmit the public address broadcast to the speakers installed in the broadcast output area A2.

The main controller 140 can control not only the entire main broadcast section 100 but also the broadcast output section 200 and can determine the abnormality on the broadcast circuit through the impedance of the broadcast circuit. The broadcasting circuit means the main broadcasting unit 100 connected by a line and the speakers 210 of the broadcasting output unit 200 installed in one broadcasting output area. Referring to FIG. 1, the main broadcasting unit 100 connected to the speakers of the broadcasting output unit 200 installed in the broadcasting output area A1 may form a broadcasting circuit. Also, the main broadcasting unit 100 connected to the speakers of the broadcasting output unit 200 installed in the broadcasting output area A2 can form another broadcasting circuit.

The main controller 140 compares impedance values obtained by combining the impedances of the speakers constituting one broadcasting circuit with the impedance values measured by the speakers installed in the broadcasting output area and impedance values measured in the broadcasting line, Or not.

More specifically, the main controller 140 receives the number of speakers of the broadcast output unit 200 installed on one broadcast circuit and the impedance of each of the speakers, synthesizes the impedances, and synthesizes the impedances of one broadcast circuit Value can be obtained. When the impedance of each of the speakers is inputted, the main controller 140 may calculate the impedance composite value on the broadcasting circuit by summing the inputted impedances . The calculated impedance composite value may be stored in the storage unit 160 by the main controller 140.

The main controller 140 can measure the impedance of the line and the speaker by sending a current to the line and the speakers constituting one broadcast circuit to obtain an impedance measurement value in the broadcast circuit.

The main controller 140 may compare the impedance composite value and the impedance measurement value to determine whether there is an abnormality on the broadcast circuit. That is, the main controller 140 subtracts the impedance composite value from the impedance measurement value, and when the subtracted value is within the predetermined range, it can be determined that there is no abnormality on the broadcast circuit. However, when the value obtained by subtracting the impedance composite value from the impedance measurement value is within a predetermined range, it can be determined that there is an abnormality on the broadcasting circuit.

More specifically, in the case of the impedance composite value, the result is calculated on the basis of the impedance of each of the speakers installed on the broadcasting output zone as a series connection, but the impedance measurement value is a value measured while the speakers are connected by the line The impedance value of the line is included. Therefore, when there is no abnormality in the broadcast circuit, the impedance measurement value and the impedance composition value may be different from each other by an impedance value of the line. However, when there is an abnormality on the broadcasting circuit, for example, when there is a disconnection of a line connecting speakers or a failure of a part of the speakers, the impedance of the abnormal line or speaker is not measured, And the impedance composite value may be equal to or greater than an impedance value of a line connecting the speakers. The predetermined range may be the sum of the impedances of the lines connecting the speakers.

Accordingly, the main controller 140 determines the impedance composition value and the impedance measurement value as described above, and compares the impedance composition value and the impedance measurement value to determine whether there is an abnormality in the speakers on the broadcasting circuit or in the line connecting them have.

However, the main controller 140 can only determine that there is an abnormality on one broadcast circuit, and can not determine which one of the speakers or the lines constituting the broadcast circuit is abnormal. Whether the speakers or the lines constituting the broadcasting circuit are abnormal or which of the lines can be distinguished by the mobile terminal of the present invention. This will be described later.

FIG. 2 is a block diagram schematically showing an embodiment of the main controller shown in FIG. 1. FIG.

2, the main controller 140 includes an impedance calculator 141, an impedance measurement unit 142, an abnormality determination unit 143, and an impedance comparison unit 144 as an embodiment .

The impedance calculating unit 141 may calculate the impedance composite value of the broadcasting circuit by summing the impedances of the speakers installed in the broadcasting output areas A1, A2, A3, .... As described above, the main broadcasting unit 100 connected to the speakers of the broadcasting output unit 200 installed in the broadcasting output area A1 may form one broadcasting circuit. The impedance calculating unit 141 may calculate the impedance It is possible to calculate the impedance composite value by receiving the impedance of each of the speakers of the broadcast output unit 200 installed in the broadcast output area A1 and synthesizing the impedances of the speakers.

The impedance measuring unit 142 may measure the impedance of the broadcasting circuit by measuring the impedance of the speakers installed in the broadcasting output area by sending a current to the line of the broadcasting circuit. The measured impedance value measured by the impedance measuring unit 142 includes the impedance of the speaker and the impedance of the line connecting the speakers as described above.

The abnormality determination unit 143 may determine whether there is an abnormality on the broadcast circuit by comparing the impedance composition value and the impedance measurement value. That is, the abnormality determination unit 143 compares the impedance composition value and the impedance measurement value, and when the difference between the impedance composition value and the impedance measurement value exceeds a predetermined range, .

The impedance search unit 144 may search the storage unit 160 to determine whether the impedance composite value is stored. The impedance searching unit 144 searches the impedance calculating unit 141 for the impedance composite value stored in the storage unit 160 before calculating the impedance composite value. If the impedance composite value is found, The abnormality determination unit 143 determines whether the impedance measurement value measured by the impedance measurement unit 142 and the impedance measurement value obtained by the impedance search unit 144, And determine whether there is an abnormality on the broadcast circuit.

Accordingly, when the impedance composite value is calculated and stored, the main controller 140 does not need to calculate the impedance of each of the speakers from the user and calculate the impedance composite value using the impedance composition value stored in the storage unit 160, Can be distinguished.

The communication unit 150 can transmit and receive data to and from the mobile terminal. The communication unit 150 may be a communication unit such as a WLAN (Wireless LAN), a Wi-Fi, a Wireless Broadband (WIBRO), a World Interoperability for Microwave Access (WIMAX), a High Speed Downlink Packet Access (HSDPA) (IrDA), infrared data association (UWB), and Ultra Wideband (UWB), and transmits and receives data between the mobile terminal 300 and the main broadcasting unit 100.

The storage unit 160 may store the impedance composite value. As described above, the impedance composition value calculated by the main controller 140 (or the impedance calculating unit 141) can be stored in the storage unit 160. [

The emergency panel 170 can be used to broadcast all the broadcast output zones regardless of the information of the broadcast output zone designated to be output from the main broadcasting unit 100 and the speaker selector 130 in an emergency such as a fire, The emergency broadcast can be transmitted to the output unit 200.

The broadcasting output unit 200 may include a plurality of speakers 210 and a line 220 connecting the speaker 210 and the main broadcasting unit 100. The broadcast output unit 200 may be installed in each of the broadcast output areas A1, A2, A3, ... so as to output a public address broadcast transmitted from the main broadcast unit 100 to each of the broadcast output areas.

A volume control circuit 211 may be additionally provided in the speaker 210. The volume control circuit 211 can determine whether to output the sound source amplified through the amplifier 120 through the main broadcast section 100 as it is or to adjust the volume of the sound source by the user's operation. The volume control circuit 211 may be an attenuation circuit.

The mobile terminal 300 may be a mobile phone, a personal digital assistant (PDA), a smart watch, a smart phone, a tablet, a notebook, or the like. The mobile terminal 300 communicates with the main broadcasting unit 100 and can sense the sound output from the speaker 210 and detects the sound output from each of the speakers 210, It is possible to determine which speaker or which of the lines is faulty or not. Also, the mobile terminal 300 may measure the sound pressure of the sound output from the broadcast output unit 200, and may remotely control the main broadcasting unit 100 so that the measured sound pressure becomes a predetermined reference sound pressure.

The mobile terminal 300 may include a microphone 310, a communication unit 320, a terminal control unit 330, an input unit 340, a display unit 350, and a storage unit 360, as shown in FIG. have.

The microphone 310 may sense the sound output from the speaker and convert the sound into an electric signal. The microphone 310 may sense a test tone output from the speaker.

The communication unit 320 can transmit and receive data to and from the main broadcasting unit 100 using a wireless communication network. The wireless communication network may be a WLAN (Wireless LAN), a Wi-Fi, a Wireless Broadband, a Wibro, a World Interoperability for Microwave Access (WIMAX), a High Speed Downlink Packet Access (HSDPA) IrDA, Infrared Data Association), UWB (Ultra Wideband).

The communication unit 320 may transmit a test tone transmission request signal to the main broadcasting unit 100 so that the main broadcasting unit 100 outputs a test tone to the speakers 210. [ The main broadcast section 100 receiving the test tone transmission request signal may generate a test tone signal and transmit the test tone signal to the speaker 210 so that the speaker 210 outputs a test tone. The communication unit 320 may transmit a remote control signal to the main broadcasting unit 100 to increase or decrease the sound pressure of the test tone output from the broadcasting output unit 200. The main broadcasting unit 100 receiving the remote control signal can increase or decrease the sound pressure of the test tone outputted to the broadcasting output unit 200 by adjusting the input level of the amplifier 120 according to the remote control signal.

The terminal control unit 330 generates the test tone transmission request signal according to the input of the user and selects either one of the lines or the speakers on the broadcasting circuit depending on whether the test tone is detected in the microphone 310 It is possible to determine whether or not a failure has occurred.

In detail, when it is determined that there is an abnormality on the broadcasting circuit through the impedance in the main broadcasting unit 100, the terminal control unit 330 can generate the test tone transmission request signal according to the input of the user. That is, when it is determined that there is an abnormality on the broadcasting circuit through the impedance in the main broadcasting unit 100, the user can select the broadcasting output area A1 ).

The mobile terminal 300 adjacent to the speaker installed in the broadcast output area A1 may generate the test tone transmission request signal according to the input of the user and may transmit the test tone transmission request signal to the main broadcasting unit 100, It is possible to control the loudspeaker to output.

A plurality of speakers installed in the broadcasting output area A1 are connected in series and the speaker closest to the main broadcasting unit 100 on the distance from the main broadcasting unit 100 is ordered from the speaker farthest from the main broadcasting unit 100 ..., N-th speaker,..., N-th speaker in the order of the farthest speaker from the nearest speaker.

The mobile terminal 300 first senses through the microphone 310 whether test tones are generated in the respective speakers from the first speaker to the Nth speaker in order and transmits the test tone through the terminal control unit 330 You can determine which of the connecting lines has a problem.

The terminal control unit 330 may determine whether the test tone is generated in the nth speaker on the broadcasting circuit that is abnormal after the test tone transmission request signal is generated according to whether the test tone is detected in the microphone 310 . That is, when the test tone is output from the n-th speaker, the microphone 310 senses the test tone and converts it into an electric signal. When the electric signal is transmitted from the microphone 310, It can be determined that the test tone is output. However, when the electric signal is not transmitted from the microphone 310, the terminal control unit 330 can determine that the test tone is not output from the n-th speaker.

If it is determined that the nth speaker does not output a test tone, it is detected whether a test tone occurs in the (n + 1) th speaker neighboring the nth speaker. That is, if it is determined that the nth speaker does not output the test tone, the terminal control unit 330 moves the user to a place where the (n + 1) th speaker neighboring the nth speaker is located, The controller 350 may control the display unit 350 to display a message on the display unit 350 to measure the test tone of the test tone.

If it is determined that the test tone is output from the (n + 1) th speaker, it may be determined that the n-th speaker is abnormal. That is, since the speakers on one broadcast circuit are connected in series, the test tone is output from the speaker located before the nth speaker, so that no test tone is output from the nth speaker and the test tone is output from the neighboring n + If the test tone occurs, it may be regarded that there is an abnormality in the nth speaker. Accordingly, the terminal control unit 330 determines that the nth speaker is out of order, and transmits a message to the display unit 350 that the nth speaker is out of order It is possible to control the display unit 350 to output the image.

If it is determined that the test tone is not output from the n-th speaker while the test tone is output from the speaker located before the n-th speaker, and if it is determined that the test tone is not outputted from the n + , The terminal control unit 330 may determine that there is an error in the line between the (n-1) th speaker and the nth speaker. As described above, when the test tone is not generated in the n-th speaker and the (n + 1) -th speaker, the speakers on one broadcast circuit are connected in series. It can be seen that there is something wrong with the track. Accordingly, the terminal control unit 330 may control the display unit 350 to output a message indicating that the line between the n-1th speaker and the nth speaker is abnormal.

On the other hand, if it is determined that the nth speaker outputs the test tone, the terminal control unit 330 detects whether a test tone is generated in the (n + 1) th speaker neighboring the nth speaker. If it is determined that the test tone is not output from the (n + 1) th speaker, it is detected whether the test tone is generated in the (n + 2) th speaker.

If it is determined that the test tone is output from the (n + 2) th speaker, the terminal control unit 330 may determine that the (n + 1) th speaker is abnormal. As described above, the speakers on one broadcast circuit are connected in series, so that the test tone is output from the n-th speaker, the test tone is not output from the (n + 1) When the test tone is output, it can be seen that the (n + 1) th speaker has a failure. Accordingly, the terminal control unit 330 may control the display unit 350 to output a message indicating that the (n + 1) th speaker is out of order.

However, if the test tone is not output from the n + 2th speaker, that is, the test tone is output from the nth speaker, the test tone is not output from the (n + 1) If the test tone is not output, the terminal control unit 330 may determine that the line between the n-th speaker and the (n + 1) -th speaker is abnormal, it is possible to control the display unit 350 to output a message indicating that the line between the (n + 1) th speakers is abnormal.

In the case where n = 1, that is, in the case where the speaker is the first speaker which is the closest speaker to the main broadcasting unit 100 on the distance from the main broadcasting unit 100 in the broadcasting circuit, if the test tone in the first speaker is not detected, The control unit 330 may determine that there is an abnormality in the line between the first speaker or the first speaker and the main broadcasting unit. Accordingly, the terminal control unit 330 may control the display unit 350 to output a message to the display unit 350 that the first speaker or the line between the first speaker and the main broadcast unit is abnormal.

If it is determined that the n-th speaker does not output the test tone, the terminal control unit 330 generates an acknowledgment request signal for requesting the user to confirm whether the n-th speaker has the volume control circuit 211, The control unit 350 can output a message to the display unit 350 to confirm that the user has the volume control circuit 211. After the user adjusts the volume control circuit 211, the terminal control unit 330 detects whether the test tone is output from the n-th speaker, and, based on the detected test tone, Or not.

On the other hand, when it is determined that there is no abnormality on the broadcasting circuit, the terminal control unit 330 generates the transmission request signal according to the input of the user, and when the measured sound pressure of the test tone monitored by the microphone 310 and the reference sound pressure And may generate a remote control signal to increase or decrease the sound pressure of the test tone output from the broadcast output unit 200 according to the comparison result.

In detail, when it is determined that there is no abnormality on the broadcasting circuit through the impedance in the main broadcasting unit 100, the terminal control unit 330 can generate the remote control signal according to the input of the user. That is, when it is determined that there is no abnormality on the broadcast circuit through the impedance in the main broadcast section 100, the user may select a broadcast signal having the speaker 210 to set the sound pressure output level with the mobile terminal 300 To the output zone A1.

The mobile terminal 300 adjacent to the speaker installed in the broadcast output area A1 may generate the test tone transmission request signal according to the input of the user and may transmit the test tone transmission request signal to the main broadcasting unit 100, It is possible to control the loudspeaker to output.

A plurality of speakers of the broadcasting output unit 200 installed in the broadcasting output area A1 are connected in series and a plurality of speakers 210 included in the broadcasting output unit 200 of the broadcasting output area A1, One broadcast circuit is formed in the broadcast section 100, and speakers belonging to the same broadcast circuit can output a test tone or a public address broadcast under the control of the main broadcast section 100. That is, when the user selects a broadcast output area for outputting a test tone and inputs the selected broadcast output area to the mobile terminal 300, the mobile terminal 300 transmits the test tone from the speakers of the broadcast output part 200 of the broadcast output area The main controller 140 of the main broadcasting station 100 transmits a test tone transmission request signal to the main broadcasting station 100 in response to the test tone transmission request signal, And the speaker 210 included in the broadcast output unit 200 may control the test tone output unit 200 to output the test tone. Accordingly, the test tone may be output from all the speakers 210 in the broadcast output area A1.

The terminal control unit 330 compares the measured sound pressure of the test tone output from all the speakers 210 in the broadcast output zone A1 with the reference sound pressure set by the user and outputs a first remote control signal Or a second remote control signal.

That is, the measured sound pressure is measured by the test tone output request signal generated in the terminal control unit 330 according to the user input of the mobile terminal 300, The tone is the sound pressure measured by the microphone 310 and measured by the terminal control unit 330.

The reference sound pressure is a target sound pressure of the sound output from the speakers 210 installed in the broadcast output area A1. The public address system outputs announcements or emergency broadcasts in the broadcast output area, and broadcasts or emergency broadcasts should be sent at such a sound pressure as to be heard by people in the broadcast output area. Therefore, the reference sound pressure can be regarded as the minimum sound pressure at which people in the broadcast output zone can hear the broadcast. The reference sound pressure may be set by the user at the mobile terminal 300. [

If there is noise in the broadcast output area, the reference sound pressure can be set in consideration of noise. For example, if there is already sound in the broadcasting output area due to a large number of people, equipment, or sounds in the broadcasting output area, the sound pressure of the public address broadcasting output from the broadcasting output area is higher than the sound pressure of the sound The public address broadcast can be heard well to people in the broadcast output area. Therefore, it is necessary to previously measure the sound pressure of the noise existing before the public address is output in the broadcast output area to the mobile terminal 300 when the reference sound pressure is set, and the reference sound pressure is set to be larger than the measured sound pressure . The noise can be detected by the microphone 310 and the sound pressure of the noise can be measured in the terminal control unit 330. The user may input the reference sound pressure to the mobile terminal 300 so that the reference sound pressure is equal to or greater than the measured sound pressure.

The terminal control unit 330 controls the amplifier 120 to increase the sound pressure of the test tone output from the broadcast output unit 200 when the measured sound pressure is less than the reference sound pressure as a result of comparing the measured sound pressure and the reference sound pressure And generate a first remote control signal. That is, the terminal control unit 330 may compare the measured sound pressure of the test tone detected by the microphone 310 with the reference sound pressure set by the user. If the measured sound pressure is smaller than the reference sound pressure, the terminal control unit 330 controls the main broadcasting unit 100 to increase the sound pressure of the sound output from the speakers 210 in the broadcasting output zone, And transmit it through the communication unit 320.

The main broadcasting unit 100 may be configured to receive the first remote control signal so that the sound pressure of the test tone outputted from the broadcasting output unit 200 installed in the broadcasting output zone is increased according to the first remote control signal, It is possible to increase the input level of the input signal 120. As the input level of the amplifier 120 increases, the sound pressure of the test tone re-outputted from the broadcast output unit 200 may increase.

After transmitting the first remote control signal, the terminal control unit 330 transmits a test tone output request signal to the main broadcasting unit 100 through the communication unit 330. The main broadcasting unit 100 receives the test tone output request signal from the amplifier 120 ) Through the broadcast output unit 200 installed in the broadcast output zone.

When the measured sound pressure is greater than the reference sound pressure as a result of comparing the measured sound pressure and the reference sound pressure, the terminal control unit 330 controls the amplifier 120 to decrease the sound pressure of the test tone outputted from the broadcast output unit 200 And can transmit the second remote control signal to the main broadcasting unit 100 through the communication unit 320. The main broadcasting unit 100 can generate the second remote control signal based on the second remote control signal The input level of the amplifier 120 may be reduced so that the sound pressure of the test tone output from the broadcast output unit 200 installed in the broadcast output zone may be reduced. As the input level of the amplifier 120 is reduced, the sound pressure of the test tone re-outputted from the broadcast output unit 200 can be reduced.

The terminal control unit 330 measures the sound pressure of the test tone again, compares the sound pressure with the reference sound pressure again, and determines whether the remeasured measured sound pressure is less than the reference sound pressure.

In this way, the mobile terminal 300 can remotely control the test tone of the main broadcasting unit 100 through the remote control until the sound pressure of the test tone outputted from the broadcasting output unit 200 installed in the broadcasting output zone coincides with the reference sound pressure, It is possible to set the speaker volume level of the public address system 1000 to a minimum number by adjusting the sound pressure.

4 is a block diagram schematically showing an embodiment of the terminal control unit 330 shown in FIG.

4, the terminal control unit 330 includes a signal generating unit 331, a test tone detecting unit 332, a failure determining unit 333, a reference sound pressure setting unit 334, and a sound pressure comparing unit 335 .

The signal generator 331 may generate a test tone transmission control signal for causing the main broadcasting unit 100 to output the test tone from the speakers 210 installed in the broadcasting output zone according to the input of the user. If it is determined that there is an abnormality on the broadcast circuit through the impedance in the main broadcast section 100, the user may select the broadcast output area A1 in which the speaker on the broadcast circuit where the abnormality occurs, And a user adjacent to the speaker installed in the broadcast output area A1 may input to the mobile terminal 300 to output a test tone from the speaker. Accordingly, the mobile terminal 300 can generate the test tone transmission request signal according to the input of the user and transmit the test tone transmission request signal to the main broadcasting unit 100. The main broadcasting unit 100 controls the speaker to output a test tone from the speaker can do.

The test tone detector 332 may determine whether the test tone is generated in the speaker according to whether the microphone 310 senses the test tone generated in the speaker. That is, the test tone detector 332 determines whether or not the test tone is generated in the nth speaker on the broadcasting circuit that is abnormal after the test tone transmission request signal is generated, according to whether the test tone is detected in the microphone 310 . When the test tone is output from the n-th speaker, the microphone 310 detects the test tone and converts it into an electric signal. When the electric signal is transmitted from the microphone 310, the test tone detector 332 detects It can be determined that the test tone is output. However, when the electric signal is not transmitted from the microphone 310, the test tone detector 332 can determine that the test tone is not output from the n-th speaker.

If the test tone is not generated in the nth speaker and the test tone is not generated in the (n + 1) th speaker, the failure determination unit 333 determines whether the test tone is abnormal in the line between the (n-1) th speaker and the If the test tone is not generated in the n-th speaker and a test tone is generated in the (n + 1) -th speaker, it may be determined that the n-th speaker is abnormal.

More specifically, if the test tone detector 332 determines that the test tone is not output from the n-th speaker, it is detected whether a test tone occurs in the (n + 1) -th speaker adjacent to the n-th speaker. That is, when it is determined that the test tone detector 332 does not output the test tone from the n-th speaker, the test tone detector 332 moves the user to a position where the (n + 1) , And controls the display unit 350 to display a message on the display unit 350 to measure the test tone at the (n + 1) th speaker.

If the test tone is detected by the test tone detector 332 and the test tone is output from the (n + 1) th speaker, the failure determination unit 333 determines whether the test tone is output from the It can be determined that there is an abnormality in the n-th speaker. Accordingly, the failure determination unit 333 determines that there is a failure in the n-th speaker, and controls the display unit 350 to output a message indicating that the n-th speaker fails in the display unit 350. [

Also, it is determined by the test tone detector 332 that the test tone is output from the speaker positioned before the n-th speaker, so that the test tone is not output from the n-th speaker, The failure determination unit 333 can determine that the line between the (n-1) th speaker and the (n) th speaker is abnormal as described above. Accordingly, the failure determination unit 333 may control the display unit 350 to output a message indicating that the line between the n-1th speaker and the nth speaker is abnormal.

On the other hand, if it is determined that the nth speaker outputs the test tone, the test tone detector 332 detects whether a test tone is generated in the (n + 1) th speaker adjacent to the nth speaker. If it is determined that the test tone is not output from the (n + 1) th speaker, it is detected whether the test tone is generated in the (n + 2) th speaker.

If it is determined that the test tone is output from the (n + 2) th speaker, the failure determination unit 333 may determine that the (n + 1) th speaker is abnormal as described above. Accordingly, the failure determination unit 333 may control the display unit 350 to output a message indicating that the (n + 1) th speaker has a failure.

However, if the test tone is not output from the n + 2th speaker, that is, the test tone is output from the nth speaker, the test tone is not output from the (n + 1) If the test tone is not output, the failure determination unit 333 may determine that there is an error in the line between the nth speaker and the (n + 1) th speaker as described above, (N + 1) th speaker and the (n + 1) th speaker.

In the case where n = 1, that is, in the case where the speaker is the first speaker which is the speaker closest to the main broadcasting unit 100 on the distance from the main broadcasting unit 100 in the broadcasting circuit, if the test tone in the first speaker is not detected, The determination unit 333 may determine that there is an abnormality in the line between the first speaker or the first speaker and the main broadcasting unit. Accordingly, the failure determination unit 333 can control the display unit 350 to output a message to the display unit 350 that the first speaker or the line between the first speaker and the main broadcasting unit is abnormal.

If it is determined that the test tone is not output from the n-th speaker, the test tone detector 332 generates an acknowledgment request signal for requesting the user to confirm whether the volume control circuit 211 is present in the n-th speaker It is possible to cause the display unit 350 to output a message to the display unit 350 to confirm that the user has the volume control circuit 211. [ After the user adjusts the volume control circuit 211, the test tone detection unit 332 detects whether the test tone is output from the n-th speaker, and the failure determination unit 333 determines whether the test tone is output It is possible to judge whether there is an abnormality on the speaker or the line as described above.

The reference sound pressure setting unit 333 can set the reference sound pressure by the user's input. The public hall broadcasting system outputs announcement broadcasting or emergency broadcasting in the broadcasting output area, so that the announcement or emergency broadcasting should be transmitted at a sound pressure enough for the people in the broadcasting output zone to hear, The reference sound pressure setting unit 333 sets the reference sound pressure to a reference sound pressure when the user inputs the sound pressure through the input unit of the mobile terminal 300. [ .

If there is noise in the broadcast output area, the reference sound pressure can be set in consideration of noise. For example, if there is already sound in the broadcasting output area due to a large number of people, equipment, or sounds in the broadcasting output area, the sound pressure of the public address broadcasting output from the broadcasting output area is higher than the sound pressure of the sound The public address broadcast can be heard well to people in the broadcast output area. Therefore, it is necessary to previously measure the sound pressure of the noise existing before the public address is output in the broadcast output area to the mobile terminal 300 when the reference sound pressure is set, and the reference sound pressure is set to be larger than the measured sound pressure . The noise can be detected by the microphone 310 and the sound pressure of the noise can be measured in the terminal control unit 330. The user may input the reference sound pressure to the mobile terminal 300 so that the reference sound pressure is equal to or greater than the measured sound pressure. Accordingly, the reference sound pressure setting unit 333 can set the input value to the reference sound pressure.

The sound pressure measuring unit 335 may measure the sound pressure of the test tone sensed by the microphone 310 and set the measured sound pressure to the measured sound pressure.

The sound pressure comparator 335 compares the measured sound pressure and the reference sound pressure and controls the main broadcasting unit 100 to increase or decrease the sound pressure of the test tone outputted from the broadcast output unit 200 according to the comparison result A remote control signal can be generated.

That is, the terminal control unit 330 may compare the measured sound pressure of the test tone detected by the microphone 310 with the reference sound pressure set by the user. If the measured sound pressure is smaller than the reference sound pressure, the terminal control unit 330 controls the main broadcasting unit 100 to increase the sound pressure of the sound output from the speakers 210 in the broadcasting output zone, And transmit it through the communication unit 320.

Also, the terminal control unit 330 subtracts the measured sound pressure of the test tone sensed by the microphone 310 from the reference sound pressure set by the user, and if the measured sound pressure is smaller than the reference sound pressure, The second remote control signal may be generated in the main broadcasting unit 100 so that the sound pressure of the sound output from the speakers 210 may be reduced and transmitted through the communication unit 320.

The input unit 340 is a function unit for receiving user input or displaying various information and data to the user, and the display unit 350 is a function for displaying various information, data, or a message generated by the terminal control unit 330 to a user. In the mobile device, the display unit 350 is often implemented in a touch screen manner. In this case, since the user input can be received by the touch screen, the input unit 340 and the display unit 350 can be integrated into the touch screen.

As described above, the public address broadcasting system 1000 according to an embodiment of the present invention determines whether there is an abnormality on the broadcasting circuit through the remote control of the mobile terminal 300, The broadcasting unit 100 confirms whether or not an abnormality has occurred on the broadcasting circuit through the impedance measurement. If there is an abnormality on the broadcasting circuit, It is possible to confirm that it is possible to reduce the maintenance cost of the public address broadcasting system 1000. In addition, it is possible to specifically determine which line or which speaker on the broadcasting circuit is faulty as well as whether there is an abnormality on the broadcasting circuit, so that it is possible to quickly and quickly handle the failure of the inside / outside broadcasting system.

Also, the whole system broadcasting system 1000 according to an embodiment of the present invention can set the output level of the speakers through the remote control of the mobile terminal 300, thereby reducing the maintenance cost of the system 1000 have.

FIG. 5 is a flowchart schematically illustrating a method for determining an error in a PBC system according to an exemplary embodiment of the present invention.

Referring to FIG. 5, a method for distinguishing an all-tube broadcast system error S1000 according to an exemplary embodiment of the present invention includes a main broadcasting unit 100, a broadcast output unit 200, a main broadcasting unit 100, (S100) of determining whether there is an abnormality on the broadcasting circuit through an impedance of a broadcasting circuit composed of a line connecting the speaker and the speaker, and detecting whether the line or the speaker is faulty by sensing the sound outputted from each of the speakers (Step S200).

In operation S100, the impedance searching unit 144 may search the storage unit 160 to determine whether the impedance value is stored in operation S101. The impedance searching unit 144 searches the impedance calculating unit 141 for the impedance composite value stored in the storage unit 160 before calculating the impedance composite value. If the impedance composite value is found, The abnormality determination unit 143 determines whether or not the impedance measurement value measured by the impedance measurement unit 142 and the impedance measurement value measured by the impedance measurement unit 144 are identical to each other, The impedance searching unit 144 may load the impedance composite value stored in the storage unit 160 so as to compare the composite values (S102).

Next, the impedance calculating unit 141 calculates the impedance of each of the speakers installed in the broadcast output areas A1, A2, A3, ... if the impedance composite value is not searched in the storage unit 160 To calculate the impedance composite value of the broadcast circuit (S103). As described above, the main broadcasting unit 100 connected to the speakers of the broadcasting output unit 200 installed in the broadcasting output area A1 may form one broadcasting circuit. The impedance calculating unit 141 may calculate the impedance It is possible to calculate the impedance composite value by receiving the impedance of each of the speakers of the broadcast output unit 200 installed in the broadcast output area A1 and synthesizing the impedances of the speakers.

Then, the impedance measuring unit 142 may measure the impedance of the speaker installed in the broadcasting output area by sending a current to the line of the broadcasting circuit (S104).

Next, the abnormality determination unit 143 may determine whether there is an abnormality on the broadcast circuit by comparing the impedance composition value and the impedance measurement value (S105). That is, the abnormality determination unit 143 compares the impedance composite value and the impedance measurement value, and when the difference between the impedance composite value and the impedance measurement value is within a predetermined range, the speaker level setting of the public address system (S106 If the difference between the impedance composite value and the impedance measurement value exceeds a predetermined range, it may be determined that there is an abnormality on the broadcast circuit (S200).

FIG. 6 is a flowchart schematically showing a method (S200) for determining whether a line or a speaker of the whole-body broadcasting system shown in FIG. 5 has a failure.

Referring to FIG. 6, in a method 200 for determining whether a line or a speaker of a public address system has a failure, the terminal control unit 330 generates the test tone transmission request signal according to a user's input (S204) (S205) whether the test tone is outputted or not. That is, when the test tone is output from the n-th speaker, the microphone 310 senses the test tone and converts it into an electric signal. When the electric signal is transmitted from the microphone 310, It can be determined that the test tone is output. However, if the electric signal is not transmitted from the microphone 310, the terminal control unit 330 may determine that the test tone is not output from the n-th speaker.

Next, if it is determined that the test tone is not output from the n-th speaker, it is detected whether a test tone occurs in the (n + 1) -th speaker neighboring the n-th speaker at step S207. That is, if it is determined that the nth speaker does not output the test tone, the terminal control unit 330 moves the user to a place where the (n + 1) th speaker neighboring the nth speaker is located, The controller 350 may control the display unit 350 to display a message on the display unit 350 to measure the test tone of the test tone.

If it is determined that the test tone is output from the (n + 1) th speaker, it may be determined that the n-th speaker is abnormal (S 208). That is, since the speakers on one broadcast circuit are connected in series, the test tone is output from the speaker located before the nth speaker, so that no test tone is output from the nth speaker and the test tone is output from the neighboring n + If the test tone occurs, it may be regarded that there is an abnormality in the nth speaker. Accordingly, the terminal control unit 330 determines that the nth speaker is out of order, and transmits a message to the display unit 350 that the nth speaker is out of order It is possible to control the display unit 350 to output the image.

If it is determined that the test tone is not output from the n-th speaker while the test tone is output from the speaker located before the n-th speaker, and if it is determined that the test tone is not outputted from the n + , The terminal control unit 330 may determine that there is an error in the line between the (n-1) th speaker and the nth speaker (S209). As described above, when the test tone is not generated in the n-th speaker and the (n + 1) -th speaker, the speakers on one broadcast circuit are connected in series. It can be seen that there is something wrong with the track. Accordingly, the terminal control unit 330 may control the display unit 350 to output a message indicating that the line between the n-1th speaker and the nth speaker is abnormal.

On the other hand, if it is determined that the nth speaker outputs the test tone, the terminal control unit 330 detects whether a test tone is generated in the (n + 1) th speaker neighboring the nth speaker at step S211. If it is determined that the test tone is not output from the (n + 1) th speaker, it is determined whether the test tone is generated in the (n + 2) th speaker at step S213.

If it is determined that the test tone is output from the (n + 2) th speaker, the terminal control unit 330 may determine that the (n + 1) th speaker is abnormal (S214). As described above, the speakers on one broadcast circuit are connected in series, so that the test tone is output from the n-th speaker, the test tone is not output from the (n + 1) When the test tone is output, it can be seen that the (n + 1) th speaker has a failure. Accordingly, the terminal control unit 330 may control the display unit 350 to output a message indicating that the (n + 1) th speaker is out of order.

However, if the test tone is not output from the n + 2th speaker, that is, the test tone is output from the nth speaker, the test tone is not output from the (n + 1) If the test tone is not output, the terminal control unit 330 may determine that there is an error in the line between the nth speaker and the (n + 1) th speaker as described above (S215) The display unit 350 may be controlled to output a message indicating that the line between the speaker and the (n + 1) th speaker is abnormal.

In the case where n = 1, that is, in the case where the speaker is the first speaker which is the closest speaker to the main broadcasting unit 100 on the distance from the main broadcasting unit 100 in the broadcasting circuit, if the test tone in the first speaker is not detected, The controller 330 may determine that there is an abnormality in the line between the first speaker or the first speaker and the main broadcast (S203). Accordingly, the terminal control unit 330 may control the display unit 350 to output a message to the display unit 350 that the first speaker or the line between the first speaker and the main broadcast unit is abnormal.

FIG. 7 is a flowchart schematically showing a fault discrimination method including a volume control circuit in the method of discriminating whether a line or a speaker of the whole-body broadcasting system shown in FIG. 6 has a fault.

Referring to FIG. 7, when it is determined that the test tone is not output from the n-th speaker, the terminal control unit 330 determines whether the n-th speaker has the volume control circuit 211 A request signal may be generated and the display unit 350 may output a message to the display unit 350 to confirm whether the user has the volume control circuit 211 (S216). After the user adjusts the volume control circuit 211, the terminal control unit 330 detects whether the test tone is output from the n-th speaker (S218). Based on the test tone output from the speaker, It is possible to judge whether or not there is an abnormality.

FIG. 8 is a flowchart schematically showing a method of setting an output level of the whole-body broadcast system shown in FIG.

Referring to FIG. 8, the output level setting method (S300) of the public address system may first measure the sound pressure for noise in the broadcast output area when it is determined that there is no abnormality on the broadcast circuit (S301). The noise can be detected by the microphone 310 and the sound pressure of the noise can be measured in the terminal control unit 330.

If there is already sound in the broadcast output area due to a large number of people, equipment or sounds in the broadcast output area, the sound pressure of the sound output from the broadcast output area must be higher than the sound pressure of the sound (noise) The public address can be heard well to people in the output area. Therefore, it is possible to measure the sound pressure of the noise existing before the public address is output in the broadcast output area to the mobile terminal 300, and to reflect the sound pressure when setting the reference sound pressure thereafter.

However, the user can select the noise in the broadcast output zone, and the reference sound pressure can be set without measuring the noise (S302).

Next, the reference sound pressure can be set (S302). The reference sound pressure is a target sound pressure of the sound output from the speakers 210 installed in the broadcast output area A1. The public address system outputs announcements or emergency broadcasts in the broadcast output area, and broadcasts or emergency broadcasts should be sent at such a sound pressure as to be heard by people in the broadcast output area. Therefore, the reference sound pressure can be regarded as the minimum sound pressure at which people in the broadcast output zone can hear the broadcast. The reference sound pressure may be set by inputting a numeric value of the sound pressure desired by the user in the mobile terminal 300.

When the sound pressure of the noise is measured, the reference sound pressure may be set to be larger than the sound pressure of the measured noise. The user may input the reference sound pressure to the mobile terminal 300 so that the reference sound pressure is equal to or greater than the measured sound pressure.

Next, the mobile terminal 300 adjacent to the speaker installed in the broadcast output area A1 may generate the test tone transmission request signal according to the input of the user and transmit the test tone transmission request signal to the main broadcasting unit 100, The speaker can be controlled to output a test tone, so that the test tone can be output from all the speakers 210 in the broadcast output zone A1 (S303).

Subsequently, the measured sound pressure of the test tone outputted from all the speakers 210 in the broadcast output zone A1 is compared with the reference sound pressure set by the user (S304, S305), and the first remote control signal Or a second remote control signal (S306).

Specifically, the measured sound pressure is output from all the speakers 210 in the broadcast output zone A1 by the test tone output request signal generated by the terminal control unit 330 according to the input of the user of the mobile terminal 300 The test tone is the sound pressure measured by the microphone 310 and measured by the terminal controller 330.

The terminal control unit 330 controls the amplifier 120 to increase the sound pressure of the test tone output from the broadcast output unit 200 when the measured sound pressure is less than the reference sound pressure as a result of comparing the measured sound pressure and the reference sound pressure And generate a first remote control signal. That is, the terminal control unit 330 may compare the measured sound pressure of the test tone detected by the microphone 310 with the reference sound pressure set by the user. If the measured sound pressure is smaller than the reference sound pressure, the terminal control unit 330 controls the main broadcasting unit 100 to increase the sound pressure of the sound output from the speakers 210 in the broadcasting output zone, And transmits it through the communication unit 320 (S306).

The main broadcasting unit 100 may be configured to receive the first remote control signal so that the sound pressure of the test tone outputted from the broadcasting output unit 200 installed in the broadcasting output zone is increased according to the first remote control signal, It is possible to increase the input level of the input signal 120. As the input level of the amplifier 120 increases, the sound pressure of the test tone re-outputted from the broadcast output unit 200 may increase.

After transmitting the first remote control signal, the terminal control unit 330 transmits a test tone output request signal to the main broadcasting unit 100 through the communication unit 330. The main broadcasting unit 100 receives the test tone output request signal from the amplifier 120 ) Through the broadcast output unit 200 installed in the broadcast output zone.

When the measured sound pressure is greater than the reference sound pressure as a result of comparing the measured sound pressure and the reference sound pressure, the terminal control unit 330 controls the amplifier 120 to decrease the sound pressure of the test tone outputted from the broadcast output unit 200 And can transmit the second remote control signal to the main broadcasting unit 100 through the communication unit 320. The main broadcasting unit 100 can generate the second remote control signal based on the second remote control signal The input level of the amplifier 120 may be reduced so that the sound pressure of the test tone output from the broadcast output unit 200 installed in the broadcast output zone may be reduced. As the input level of the amplifier 120 is reduced, the sound pressure of the test tone re-outputted from the broadcast output unit 200 can be reduced.

The terminal control unit 330 measures the sound pressure of the test tone again, compares the sound pressure with the reference sound pressure again, and determines whether the remeasured measured sound pressure is less than the reference sound pressure.

The foregoing description is merely illustrative of the technical idea of the present invention, and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention.

Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments.

The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

1000: Public Address System
100: main broadcasting station
200: Broadcast output unit
300: mobile terminal

Claims (17)

1. A public address system capable of outputting public address broadcasts to a plurality of broadcast output zones,
A broadcast output unit comprising a plurality of speakers installed in each of the broadcast output zones;
A main broadcasting unit for transmitting the public address broadcast to the broadcast output unit; And
A mobile terminal for communicating with the main broadcasting unit and detecting sound output from the speaker; And,
Wherein the main broadcasting unit determines whether or not the broadcasting circuit is abnormal through the impedance of the main broadcasting unit, the broadcasting output unit, and the broadcasting circuit including the main broadcasting unit and the broadcasting output unit,
Wherein the mobile terminal measures the sound pressure of the sound output from the broadcast output unit and remotely controls the main broadcast unit so that the measured sound pressure becomes a predetermined reference sound pressure,
The mobile terminal comprises:
A microphone for sensing the sound output from the speaker and converting the sound into an electrical signal;
A communication unit for transmitting a test tone transmission request signal to the main broadcasting unit so that the main broadcasting unit outputs test tones to the speakers;
And a controller for comparing the measured sound pressure of the test tone monitored by the microphone and the reference sound pressure to generate a transmission request signal according to a user's input, A terminal control unit for generating a remote control signal for increasing or decreasing the sound pressure of the tone;
A display unit for displaying a message generated by the terminal control unit; And
A storage unit for storing an impedance on the broadcasting circuit calculated by the main broadcasting unit; And it includes a
Wherein the communication unit transmits the remote control signal to the main broadcasting unit,
Wherein the mobile terminal determines whether the line or the speaker is faulty by sensing the sound output from each of the speakers when the main broadcast section determines that the broadcast circuit is abnormal,
The terminal control unit,
When the main broadcasting unit determines that there is an abnormality on the broadcasting circuit, generates the test tone transmission request signal,
Determining whether the test tone is generated in the n-th speaker on the broadcast circuit according to whether the test tone is detected in the microphone,
If it is determined that the test tone is not output from the n-th speaker, it is detected whether a test tone occurs in the (n + 1) -th speaker neighboring the n-th speaker,
If the test tone is output from the (n + 1) th speaker, it is determined that the nth speaker has an error,
If the test tone is not output from the (n + 1) th speaker, it is determined that there is an abnormality in the line between the (n-1) th speaker and the nth speaker,
The display unit includes:
If it is determined by the terminal control unit that the nth speaker does not output a test tone, displays a message to measure the test tone from the (n + 1) th speaker,
If the nth speaker is determined to be abnormal by the terminal control unit, the nth speaker displays a message indicating that the nth speaker is out of order,
If the terminal control unit determines that there is an error in the line between the (n-1) th speaker and the (n) th speaker, a message indicating that the line between the (n-1) th speaker and the ,
The terminal control unit,
If it is determined that the test tone is output from the n-th speaker, whether the test tone is generated in the (n + 1) -th speaker neighboring the n-th speaker,
If the test tone is not output from the (n + 1) th speaker, it is detected whether the test tone is generated in the (n + 2)
If the test tone is output from the (n + 2) th speaker, it is determined that the (n + 1) th speaker has an error,
If the test tone is not output from the (n + 2) th speaker, it is determined that the line between the nth speaker and the (n + 1) th speaker is abnormal,
The display unit includes:
If the n + 1th speaker is judged to be abnormal by the terminal control unit, a message indicating that the (n + 1) th speaker is faulty is displayed,
If it is determined by the terminal control unit that there is an error in the line between the nth speaker and the (n + 1) th speaker, a message indicating that the line between the nth speaker and the (n + 1) Wherein the system comprises: The method according to claim 1,
The main broadcasting unit,
A sound source reproducing unit for generating a sound source required for the public address broadcasting;
An amplifier for amplifying the sound source reproduced by the sound source reproducer;
A speaker selector for turning on and off the broadcasting output unit of the broadcasting output zone to output the amplified sound source;
A main controller for controlling the main broadcast section or the broadcast output section and determining whether there is an abnormality on the broadcast circuit through an impedance of the broadcast circuit; And
A communication unit for transmitting and receiving data to and from the mobile terminal; And a control unit for controlling the control unit. 3. The method of claim 2,
The main controller includes:
An impedance calculation unit for calculating an impedance composite value of the broadcasting circuit by summing the impedances of the speakers installed in the broadcasting output zone;
An impedance measuring unit for measuring an impedance of the speakers installed in the broadcast output zone by sending a current to the line to obtain impedance measurements of the broadcast circuit; And
An abnormality determination unit for comparing the impedance composition value and the impedance measurement value to determine whether there is an abnormality on the broadcast circuit; And a control unit for controlling the control unit. The method of claim 3,
Wherein the abnormality determination unit compares the impedance composition value and the impedance measurement value and determines that there is an abnormality on the broadcast circuit when the difference between the impedance composition value and the impedance measurement value exceeds a predetermined range A public address broadcasting system characterized by. The method of claim 3,
Wherein the main broadcasting unit further comprises a storage unit for storing the impedance composite value. 6. The method of claim 5,
Wherein the main controller further includes an impedance search unit for searching the storage unit to determine whether the impedance composition value is stored,
Wherein the impedance searching unit searches for the impedance composition value stored in the storage unit before the impedance calculation unit calculates the impedance composition value,
The impedance calculation unit does not calculate the impedance composite value when the impedance composite value is found, and the abnormality determination unit compares the impedance measurement value measured by the impedance measurement unit with the impedance composition value found by the impedance search unit And judges whether there is an abnormality on the broadcast circuit. delete 3. The method of claim 2,
The terminal control unit,
Generates a first remote control signal for controlling the amplifier so that the sound pressure of the test tone output from the broadcast output unit is increased when the measured sound pressure is less than the reference sound pressure as a result of comparing the measured sound pressure and the reference sound pressure,
And generating a second remote control signal for controlling the amplifier so that the sound pressure of the test tone output from the broadcast output unit is reduced when the measured sound pressure is greater than the reference sound pressure as a result of comparing the measured sound pressure and the reference sound pressure A public address broadcasting system characterized by. The method according to claim 1,
The microphone may sense a noise in the broadcast output zone in which the broadcast output unit is installed according to an input of the user,
The terminal control unit measures the sound pressure of the noise,
Wherein the reference sound pressure is larger than the sound pressure of the noise. 3. The method of claim 2,
Wherein the main broadcasting unit controls the input level of the amplifier so that the sound pressure of the test tone outputted from the broadcast output unit is increased or decreased according to the remote control signal when the remote control signal is received, . delete delete delete The method according to claim 1,
The terminal control unit,
wherein the controller determines that there is an abnormality in the line between the first speaker or the first speaker and the main broadcasting unit when the test tone at the first speaker with n = 1 is not detected. The method according to claim 1,
The terminal control unit,
A signal generator for generating a test tone transmission control signal for causing the main broadcasting unit to output the test tone from the speaker installed in the broadcast output zone according to an input of the user;
A reference sound pressure setting unit for setting the reference sound pressure by an input of the user;
A sound pressure measuring unit for measuring the sound pressure of the test tone by sensing the test tone generated by the microphone in the speaker;
A sound pressure comparator that compares the measured sound pressure and the reference sound pressure and generates a remote control signal to increase or decrease a sound pressure of the test tone outputted from the broadcast output unit according to a result of the comparison;
A test tone detector for determining whether the test tone is generated in the speaker according to whether the microphone senses the test tone generated in the speaker; And
if the test tone does not occur in the nth speaker and the test tone does not occur in the (n + 1) th speaker, it is determined that the line between the (n-1) th speaker and the nth speaker is abnormal, A failure determining unit for determining that there is an abnormality in the n-th speaker when a test tone is not generated in the speaker and a test tone is generated in the (n + 1) -th speaker; And a control unit for controlling the control unit. A method for checking a public address system capable of outputting public address broadcasts to a plurality of broadcast output zones,
The public address broadcasting system includes:
A broadcast output unit comprising a plurality of loudspeakers installed in each of a plurality of broadcast output areas to which a public address broadcast is output;
A main broadcasting unit for transmitting the public address broadcast to the broadcast output unit; And
A mobile terminal for communicating with the main broadcasting unit and detecting sound output from the speaker; And,
In the method for checking the public address system,
Determining whether there is an abnormality on the broadcast circuit through the impedance of the main broadcast section, the broadcast output section, and the broadcast circuit including the main broadcast section and the broadcast output section;
Determining which line or which speaker of the line or the plurality of speakers has a failure by sensing the sound output from each of the speakers; And
Measuring a sound pressure of the sound outputted from the broadcast output unit and setting an output level so that the measured sound pressure is a predetermined reference sound pressure when there is no abnormality on the broadcasting circuit; And,
The mobile terminal comprises:
A microphone for sensing the sound output from the speaker and converting the sound into an electrical signal;
A communication unit for transmitting a test tone transmission request signal to the main broadcasting unit so that the main broadcasting unit outputs test tones to the speakers;
A terminal control unit for generating the transmission request signal according to an input of a user and determining which line or speaker of the line or the speaker on the broadcasting circuit has a failure according to whether the test tone is detected by the microphone;
A display unit for displaying a message generated by the terminal control unit; And
A storage unit for storing an impedance on the broadcasting circuit calculated by the main broadcasting unit; / RTI >
Wherein the step of determining which line or which speaker is faulty comprises:
Outputting a test tone from the speaker by remote control of the main broadcasting unit by the mobile terminal when it is determined that there is an abnormality on the broadcasting circuit;
Determining whether the test tone is generated in the n-th speaker on the broadcast circuit according to whether the test tone is detected in the microphone;
Detecting whether a test tone is generated in an (n + 1) -th speaker neighboring the n-th speaker when it is determined that the n-th speaker does not output the test tone;
Determining that the nth speaker is abnormal when the test tone is output from the (n + 1) th speaker, and displaying a message indicating that the nth speaker is faulty on the display unit; And
Th speaker and the n-th speaker when the test tone is not output from the (n + 1) th speaker, the controller determines that the line between the (n-1) Displaying a message that the line between the speakers is abnormal; / RTI >
Wherein the step of determining which line or which speaker is faulty comprises:
Detecting whether a test tone occurs in an (n + 1) -th speaker neighboring the n-th speaker when it is determined that the n-th speaker outputs the test tone;
Detecting whether the test tone occurs in the (n + 2) th speaker when the test tone is not output from the (n + 1) th speaker;
If the test tone is output from the (n + 2) th speaker, determining that the (n + 1) th speaker is abnormal and displaying a message indicating that the (n + 1) th speaker is faulty on the display unit;
Th speaker and the (n + 1) -th speaker when the test tone is not output from the (n + 1) th speaker and the (n + And displaying a message indicating that the line between the speakers is abnormal. 17. The method of claim 16,
Wherein setting the output level comprises:
Setting the reference sound pressure;
Outputting a test tone from the speaker by remote control of the main broadcasting unit by the mobile terminal;
Measuring a sound pressure of the test tone to set a measured sound pressure of the test tone;
Comparing the reference sound pressure and the measured sound pressure;
Generating a remote control signal for causing the main broadcasting unit to increase or decrease a sound pressure of the test tone outputted from the broadcast output unit according to the comparison result; And
Outputting the test tone whose sound pressure is increased or decreased according to the remote control signal; Wherein the method comprises the steps of:

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