KR102619990B1 - System for public address signal distribution with individual speaker path monitoring fuction, and methdo for operating the system - Google Patents

Abstract

A public address signal distribution system and operating method having an individual speaker connection path monitoring function are disclosed. A public address signal distribution system with an individual speaker connection path monitoring function according to an embodiment of the present invention generates sound sources and test signals, a control unit that monitors and controls the overall status of the system, and amplifies the sound source signal or test signal. an amplifying unit, a first connection unit for outputting the amplified sound source signal by selecting the amplification means of the sound source signal, a switching unit for selecting connection or disconnection of the amplified test signal, and connecting one of the first connection unit and the switching unit to the output unit. It includes a second connection part that outputs the amplified sound source and the test signal to an output means.

Description

Public address signal distribution system and operating method with individual speaker connection path monitoring function {SYSTEM FOR PUBLIC ADDRESS SIGNAL DISTRIBUTION WITH INDIVIDUAL SPEAKER PATH MONITORING FUCTION, AND METHDO FOR OPERATING THE SYSTEM}

The present invention relates to a public address signal distribution system and operating method having an individual speaker connection path monitoring function. More specifically, a public address signal distribution system having an individual speaker connection path monitoring function capable of individual response in the event of a physical failure of some lines. It is about systems and operating methods.

The Public Address System is a voice broadcasting system used in schools, businesses, buildings, and apartments to broadcast to the entire building. Depending on where the system is installed, fire broadcasting, disaster broadcasting, and remote broadcasting are possible.

The public address system is equipped with a public address signal distribution system to distribute broadcast signals so that they can be output from a plurality of terminal speakers. Looking at the public address signal distribution system, a control unit that receives a public address signal from an emergency broadcasting facility or system manager and generates a sound source signal or a test signal for monitoring the status of the system and controls the entire system, and the sound source transmitted from the control unit An amplifier that amplifies the power of the signal and the test signal, an output unit that outputs the amplified signal through an output means such as a speaker, and a connector that provides a physical transmission path through which the sound source signal or test signal is transmitted to the output unit. Includes.

The conventional public address signal distribution system is intended to simply distribute signals, and corresponds to a system that selectively distributes public address signals to output means located at a plurality of output destinations. In other words, it is not equipped with any means for detecting, determining, and responding to abnormalities in the input signal, output signal, and physical wiring that is the connection path between the input signal and output signal of the public address signal distribution system.

This system poses serious safety concerns because it does not have the ability to detect and respond to abnormalities in the path through which high-power signals are transmitted in order to transmit public address signals over long distances.

In addition, in the case of some lines, when a physical failure occurs, it is difficult to determine the failure situation, which may delay the failure response time, and there is a problem in that emergency broadcasting is impossible in the event of an emergency.

Domestic Patent Publication No. 10-0420163 (registered on February 12, 2004)

In order to solve the above-mentioned problems, the technical problem to be achieved by the present invention is to connect individual speakers that can respond to physical failures in some lines by individually detecting high power input and output signals of the public address signal distribution system. The purpose is to present a public address signal distribution system and operation method with a route monitoring function.

The problems of the present invention are not limited to those mentioned above, and other problems not mentioned will be clearly understood by those skilled in the art from the description below.

As a means to solve the above-mentioned technical problem, a public address broadcast signal distribution system according to an embodiment of the present invention includes a microcomputer including a control unit, and an amplification unit including an amplification means for amplifying the power of the broadcast signal output from the control unit. , an output unit that selectively connects the broadcast signal amplified in the amplifier to a plurality of output means, and a connection unit that selectively connects the amplifier and the output unit to configure a physical path through which the amplified broadcast signal is transmitted.

The output means may be a speaker.

The broadcast signal may be a sound source signal in an audible frequency band or a test signal in an inaudible frequency band.

The control unit may include a signal generator that generates the broadcast signal, and a signal detector that detects the state of the generated broadcast signal.

The amplifying means may be a power amplifier.

The amplification means may include one or more of a sound source amplifier and an auxiliary amplifier for amplifying the sound source signal, and a test amplifier for amplifying the test signal.

The output unit may include a control box that detects the state of a signal connected to the output means.

The control box and each output means may be individually connected one by one.

The control box may include a connection means that determines whether the connection part is connected to the output means.

The control box may include a communication module that is connected to the control unit and communicates through a communication medium.

The control box may include a sensing unit that detects a broadcast signal input from the connection unit.

The connection unit may include a first connection unit including a connection means for outputting one of the amplified sound source signals input from the sound source amplifier and the auxiliary amplifier.

The connection unit may include a switching unit including connection means for selecting whether to output the amplified test signal input from the test amplifier.

The connection unit may include a second connection unit including a connection means for outputting one of the signals input from the first connection unit and the switching unit.

The control unit may be provided with a selection unit that individually controls the connection means.

The control unit may include an interface unit capable of receiving control commands from the outside and outputting status information.

Meanwhile, in the operating method of a public address signal distribution system with an individual speaker connection path monitoring function according to another embodiment of the present invention, the step of generating a test signal in a microcomputer, the path through which the test signal can be input to the control box It includes steps of connecting and detecting the state of the test signal in the control box.

After the test signal generation step, a step of amplifying the test signal using an amplification means may be further included.

After the test signal generation step, a step of controlling a connection means that can be physically disconnected from the path through which the test signal can be input to the control box may be further included.

After the step of detecting the test signal state, a step of adjusting the amplification intensity of the amplification means may be further included by reflecting the detection result.

In addition, in a method of operating a public address signal distribution system with an individual speaker connection path monitoring function according to another embodiment of the present invention, the steps include generating a sound source signal in a microcomputer, amplifying the sound source signal with an amplification means, It includes connecting a path through which the amplified sound source signal can be input to the control box, and detecting the state of the sound source signal in the control box.

After the step of amplifying the sound source signal, the method may further include detecting the state of the amplified sound source signal in a microcomputer, and switching the amplification means to another amplification means by reflecting the detection result of the amplified sound source signal.

After the sound source signal state detection step, a step of adjusting the amplification intensity of the amplification means may be further included by reflecting the detection result.

According to the present invention, maintenance is performed by detecting abnormalities in high-power input and output signals of the public address signal distribution system by means for monitoring the input signal of the public address signal distribution system and means for monitoring the output signal. It is effective in providing a public address signal distribution system with an individual speaker monitoring function that is easy and allows rapid response to emergency situations.

In addition, according to the present invention, when an abnormality is detected in the input signal, there is an effect of providing a public address signal distribution system capable of normal operation through duplication in which the amplifying means of the path where the abnormality is detected is switched to an auxiliary amplifying means.

In addition, according to the present invention, it is possible to detect the status of each signal transmission path connecting to individual speakers of the public address signal distribution system through a test signal, thereby providing quick fault location detection and maintenance information.

The effects of the present invention are not limited to those mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the description below.

The attached drawings are intended to explain the present invention in more detail to those skilled in the art, and the technical idea of the present invention is not limited thereto.
1 is a block diagram of a public address signal distribution system with individual speaker connection path monitoring function according to a preferred embodiment of the present invention;
Figure 2 is a schematic diagram showing the signal flow of a public address signal distribution system with individual speaker connection path monitoring function according to a preferred embodiment of the present invention;
Figure 3 is a block diagram of a speaker monitoring unit applied to a public address signal distribution system having an individual speaker connection path monitoring function according to a preferred embodiment of the present invention, and
Figure 4 is a flowchart illustrating the operating procedure of a public address signal distribution system with an individual speaker connection path monitoring function according to a preferred embodiment of the present invention.

The above objects, other objects, features and advantages of the present invention will be easily understood through the following preferred embodiments related to the attached drawings. However, the present invention is not limited to the embodiments described herein and may be embodied in other forms. Rather, the embodiments introduced herein are provided so that the disclosed content will be thorough and complete and so that the spirit of the present invention can be sufficiently conveyed to those skilled in the art.

In this specification, when an element is referred to as being on another element, it means that it may be formed directly on the other element or that a third element may be interposed between them. Additionally, in the drawings, the thickness of components is exaggerated for effective explanation of technical content.

In this specification, when terms such as first, second, etc. are used to describe components, these components should not be limited by these terms. These terms are merely used to distinguish one component from another. Embodiments described and illustrated herein also include complementary embodiments thereof.

Additionally, when a first element (or component) is referred to as being operated or executed on (ON) a second element (or component), the first element (or component) means that the second element (or component) is ON. It should be understood as being operated or executed in an environment in which it is operated or executed, or operated or executed through direct or indirect interaction with a second element (or component).

If any element, component, device, or system is said to contain a component consisting of a program or software, even if explicitly stated, that element, component, device, or system is not intended to allow that program or software to run or operate. It should be understood as including hardware (e.g., memory, CPU, etc.) or other programs or software (e.g., operating system or drivers required to run the hardware) required to run the computer.

In addition, unless specifically stated in the implementation of an element (or component), it should be understood that the element (or component) may be implemented in any form of software, hardware, or software and hardware.

Additionally, the terms used in this specification are for describing embodiments and are not intended to limit the present invention. As used herein, singular forms also include plural forms, unless specifically stated otherwise in the context. As used in the specification, 'comprises' and/or 'comprising' does not exclude the presence or addition of one or more other elements.

Figure 1 is a block diagram of a public address signal distribution system with an individual speaker connection path monitoring function according to a preferred embodiment of the present invention.

Referring to Figure 1, a public address signal distribution system (hereinafter referred to as 'public address signal distribution system') 1000 having an individual speaker connection path monitoring function according to a preferred embodiment of the present invention includes a control unit 100, an amplification It includes a unit 200, a connection unit 300, and an output unit 400.

The control unit 100 receives a public address signal such as voice or emergency alert broadcast generated from an emergency broadcasting facility or a control command from the system manager, generates a signal corresponding to the sound source (hereinafter referred to as a sound source signal), and transmits it through an appropriate path. and performs status detection and control functions of each component of the public address signal distribution system 1000. The control unit 100 may be implemented through a microcomputer, and detailed configuration and functions will be described later.

The amplifier 200 performs the function of amplifying the power of the sound source signal and test signal transmitted from the control unit 100 through an amplification means, and the amplification means includes a sound source amplifier 210, an auxiliary amplifier 220, and a test signal. Includes amplifier 230.

The sound source amplifier 210 amplifies the power of the sound source signal received from the sound source signal generator 121 included in the control unit 100 so that the sound source signal can be transmitted over a long distance.

A plurality of sound source amplifiers 210 may be provided, and each sound source amplifier 210 may receive the same sound source signal or different sound source signals from the sound source signal generator 121, and each may have an individual amplification value. It can be controlled.

In particular, the output intensity of each sound source amplifier 210 can be adjusted depending on the length of the cable from the output unit 400 to each speaker, the number of speakers, etc., details of which will be described later. .

The auxiliary amplifier 220 may operate when it is determined that the signal is not being output smoothly from the sound source amplifier 210. That is, when it is determined that a specific sound source amplifier 210 is in an abnormal state, the sound source amplifier 210 in the abnormal state is switched to the auxiliary amplifier 220 through the first connection unit 310, so that the sound source amplifier in the abnormal state ( It is possible to configure a redundant system that can provide normal public address service without interruption even during the maintenance time of 210).

The test amplifier 230 amplifies the power of the test signal received from the test signal generator 131 included in the control unit 100 so that it can be transmitted over a long distance.

The connection unit 300 performs a function of connecting a path for transmitting the input signal amplified from the amplifier 200 to the output unit 400, and includes the first connection unit 310, the switching unit 320, and the second connection unit 310. Includes a connection portion 330.

The first connection unit 310 is one of two input signals connected to each output unit of the sound source amplifier 210 and the auxiliary amplifier 220, which amplifies the sound source signal received from the sound source signal generator 121 of the control unit 100. Connect so that one can be output selectively.

The first connection unit 310 may include a plurality of relays as connection means, and individual relays as connection means may be selectively operated by control of the amplifier selection unit 122 of the control unit 100.

The switching unit 320 performs a function of connecting or disconnecting a path through which the test signal generated by the test signal generator 131 of the control unit 100 can be transmitted to the second connection unit 330.

The switching unit 320 may include a plurality of switches as connection means, and individual switches may be selectively operated by control of a switch selection unit 132, which will be described later.

The second connection unit 330 may be connected to selectively output one of two input signals connected to each output unit of the first connection unit 310 and the switching unit 320.

The second connection unit 330 may include a plurality of relays as connection means, and individual relays may be selectively operated by control of the output selection unit 142, which will be described later.

The output unit 400 detects the sound source signal or test signal transmitted from the second connection unit 330 and transmits it to an output medium such as a speaker.

The output unit 400 may include a control box 410 for monitoring the state of the sound source signal or test signal.

The control box 410 can be arranged in a one-to-one correspondence with a plurality of output media, and can individually detect the final signal output through each output media.

The control unit 100 performs signal connection control, status monitoring, and external interface functions between the amplification unit 200, the first connection unit 310, the switching unit 320, the second connection unit 330, and the output unit 400. do.

More specifically, the control unit 100 includes a main controller 110, a signal generation unit, a selection unit, a signal detection unit, an output control unit 143, and an interface unit. Additionally, the signal generator includes a sound source signal generator 121 and a test signal generator 131. Additionally, the signal detection unit includes a sound source signal detection unit 123 and a test signal detection unit 133. Additionally, the selection unit includes an amplifier selection unit 122, a switch selection unit 132, and an output selection unit 142. Additionally, the interface unit includes a local interface unit 151 and a network interface unit 152.

The main controller 110 controls the overall operation of the public address signal distribution system 1000.

The sound source signal generator 121 controls the control unit 100 to generate a public broadcast signal such as a voice or emergency alert broadcast automatically or manually generated from an emergency broadcasting facility that satisfies the NFSC 202 or NFSC 203 standards, or a broadcast generated by a system administrator. It receives signals as input and generates sound signals.

The sound source signal generated by the sound source signal generation unit 121 may be transmitted to the output unit 400 through the second connection unit 330.

The amplifier selection unit 122 controls to select an amplifier that amplifies the power of the sound source signal through the first connection unit 310 according to the state detected by the sound source signal detection unit 123.

The sound source signal detection unit 123 detects the sound source signal amplified between the amplifier 200 and the second connection unit 330. More specifically, the sound source signal detection unit 123 senses the voltage, current, and phase of the amplified sound source signal. At this time, an attenuator may be additionally provided at the input unit to protect the circuit of the sound source signal detection unit 123 from the amplified sound source signal.

The value sensed by the input signal detection unit 123 can be compared with a predetermined normal range value to determine whether each sound source amplifier 210 is normal, and according to the determination result, the amplifier selection unit 122 selects the 1 By controlling the connection unit 310, the sound source amplifier 210 in an abnormal state can be switched to the auxiliary amplifier 220.

The test signal generator 131 generates a test signal to monitor the status of the signal transmission path of the public address signal distribution system. At this time, the test signal may be a signal in an inaudible frequency band that humans cannot hear even if it is output through a speaker, and the inaudible frequency band corresponds to a band exceeding 20,000 Hz.

The test signal generated by the test signal generator 131 may be transmitted to the output unit 400 through the second connection unit 330.

For long-distance transmission of the test signal, a test amplifier 230 is additionally provided to amplify the power of the test signal.

The test signal detection unit 133 detects the state of the test signal.

The test signal detection unit 133 senses the voltage, current, and phase of the test signal while the switching unit 320 is disconnected, and compares the sensed value with a predetermined normal range to detect the test signal. Determine whether it is normal.

The test signal detection unit 183 may be additionally equipped with an attenuator at the input portion to protect the circuit from the amplified test signal.

The switch selection unit 132 controls the operation of individual switches that are connection means of the switching unit 320, which provides a physical path through which the test signal can be connected to the second connection unit 330.

If the second connection unit 330 outputs a sound source signal rather than a test signal and the switching unit 320 is connected, the quality of the sound source signal may be deteriorated due to the test signal. That is, the switching unit 320 can be used to completely isolate the test signal input to the second connection unit 330.

The output selection unit 142 connects the second connection unit 330 so that one of the test signal applied from the switching unit 320 or the sound source signal applied from the amplification unit 200 can be output from the second connection unit 330. Control.

The output control unit 143 performs communication and control functions with the control box 410 each connected to a plurality of speakers.

The output control unit 143 includes a protocol for performing one-to-many (1 x N) communication with a plurality of control boxes 410 located remotely. At this time, each control box 410 must be equipped with a communication medium that can be connected to the control unit 100.

Through the communication protocol, information that senses a signal output from each control box 410 to an individual speaker can be transmitted to the output control unit 143, and the output control unit 143 transmits a sound source to the speaker based on the sensing information. You can control whether to output a signal or a test signal.

Additionally, the output control unit 143 may control the strength of the signal output from the output means based on information sensed by the control box 410.

More specifically, the connection state of the switching unit 320 and the second connection unit 330 is set so that the test signal generated from the test signal generator 131 connects a path to a specific speaker to be monitored, and the output The control unit 143 receives the information sensed by the control box 410 and adjusts the amplification degree of the test amplifier 230 of the amplification unit 200 so that a signal of desired intensity is output from the output means.

In one embodiment, voltage and current values are acquired from a specific control box 410, the impedance value of the path to a specific speaker is converted, and then the minimum output (Pout) required for smooth broadcasting from a specific speaker is attenuated by the impedance. The gain of the sound source amplifier 210 can be adjusted so that the output of the test amplifier 230 is greater than (Pout + Ploss) by reflecting the loss (Ploss).

In addition, in the same manner, even in a state where the connection state of the switching unit 320 and the second connection unit 330 is set so that the sound source signal connects a path to a specific speaker to be monitored, the output control unit 143 is connected to the control box 410. By receiving information sensed from , the amplification degree of the sound source amplifier 210 of the amplification unit 200 can be adjusted so that a signal of desired intensity is output from the output means.

The local interface unit 150 includes a local input unit and a local output unit.

The local input unit is connected to buttons, switches, keyboards, mice, etc. provided in various devices in which the components are implemented in order to control the operation of the components constituting the public address signal distribution system 1000 and input commands and information. It could be an interface.

The local output unit may be an external interface such as an LED or a display provided in various devices in which the components are implemented to output the status and information of the components constituting the public address signal distribution system 1000.

The network interface unit 160 corresponds to a communication interface that provides short-distance/long-distance communication for controlling various operations of components constituting the public address signal distribution system 1000 and transmitting and receiving information.

In particular, by providing a communication path with operating software that can remotely control the public address signal distribution system 1000, the system operator can flexibly configure and operate the public address signal distribution system 1000 even remotely.

Figure 2 is a schematic diagram showing the sound source signal flow of the public address signal distribution system 1000 with an individual speaker connection path monitoring function according to a preferred embodiment of the present invention.

In this embodiment, to configure the public address signal distribution system 1000 including 20 10W speakers, four sound source amplifiers 210, which are 60W class power amplifiers, and one auxiliary amplifier 220 of the same level are provided.

The sound source signal generated in the sound source signal generation unit 121 and input to the amplification unit 200 is amplified through each sound source amplifier (210a, 210b, 210c, 210d), and output to the output unit 400 through the second connection unit 330. ) is transmitted to the side and input into the control box 410.

The input signal amplified by the sound source amplifier 210 can have voltage, current, and phase values measured by a sensing means such as a current sensor of the sound source signal detection unit 123 (A), and the measured values are predefined. If it is not within the normal range, the sound source amplifier 210 can be switched to the auxiliary amplifier 220.

Afterwards, the control box 410 monitors the final output signal for abnormalities by sensing the voltage, current, and phase of the signal output through an output means such as a speaker. If it is determined that there is an abnormality in the final output signal because the value measured in the control box 410 is not within the predefined normal range, the connection can be controlled so that the signal is not output from the control box 410 to the output means. there is.

Figure 3 is a block diagram of a control box 410 applied to a public address signal distribution system with an individual speaker connection path monitoring function according to a preferred embodiment of the present invention.

A control box 410 is individually connected to each speaker in the output unit 400, and the control box 410 includes a sensing unit 411, a switch 412, a communication module 413, and a controller 414. do.

The sensing unit 411 can measure the current, voltage, and phase of the signal applied to the speaker. At this time, an attenuator may be provided at the input unit to protect the circuit of the sensing unit.

The communication module 413 provides a communication function with the control unit 100 through a communication medium connected between the control box 410 and the control unit 100.

More specifically, the status information of the control box 410, including the value measured from the sensing unit 411, is transmitted to the output control unit 143, and the output control unit 143 selects whether to output to the speaker. Control signals, including control signals, can be received.

In addition, in order for each control box 410 connected to a plurality of speakers to individually control each speaker, the control unit and the plurality of control boxes 410 must be capable of one-to-many communication, so data is transmitted using a communication protocol such as RS485. Send and receive.

The switch 412 is a connection means that connects or disconnects a path through which the sound source signal or test signal received from the second connection unit can be transmitted to the speaker.

The controller 414 performs overall control of the control box.

More specifically, it collects the values measured by the sensing unit 411, controls communication with the output control unit 143 through the communication module 413, and controls whether the switch 412 is connected. You can.

In particular, whether the switch 412 is connected can be controlled by the controller 414 independently determining the value measured by the sensing unit 411, and the value measured by the sensing unit 411 can be controlled by the communication module. After transmitting the control signal to the output control unit 143 through 413, the switch 412 may be controlled by receiving a control signal from the output control unit 143.

Figure 4 is a flowchart illustrating the operating procedures of a public address distribution system with an individual speaker connection path monitoring function according to a preferred embodiment of the present invention.

When the public address distribution system 1000 starts, the operation mode of the system is selected (S100). At this time, the operation modes include test mode (S200, not shown) and sound source mode (S300, not shown).

When the operation mode is selected as a test mode (S200, not shown), the control unit 100 generates a test signal (S210), and connects the second connection unit 330 so that the test signal is connected to the output unit 400. Do it (S240).

If the test signal requires high output, the test signal is amplified in the amplifier 200 (S220).

In addition, if a switching unit 320 is provided to prevent sound source quality deterioration when selecting a sound source mode, which will be described later, the switching unit 320 is connected (S230).

In this way, when the test path (TP) through which the test signal can be transmitted from the second connection unit 330 to the output unit 400 is secured, a test is performed based on the current, voltage, or phase value measured at the output unit 400. The state of the path (TP) is detected and it is determined whether the state of the test path (TP) is normal (S250). In one embodiment, the current value can be measured in the control box, the impedance (Z) of the test path (TP) can be converted from this, and whether it is normal can be determined by comparing it with a predetermined normal range value.

If the detected state of the test path (TP) is judged to be normal, the operation mode is selected again (S100), and if it is judged to be abnormal, it is determined whether the state can be reached by adjusting the amplification of the amplification unit 200 or not and amplified. Select whether to adjust (S260).

When selecting amplification adjustment, adjust the amplification of the test amplifier 230 of the test path (TP) judged to be abnormal (S270), determine again whether the state of the test path (TP) is normal (S250), and proceed with the following procedure. Perform.

If no amplification adjustment is selected, the system will be shut down for problem identification and maintenance. At this time, since the test path (TP) determined to be abnormal among the test paths (TP) connected to each output unit 400 can be specified, an individual speaker connection path monitoring function can be implemented.

In particular, the section between the second connection unit 330 and the output unit 400 is relatively long compared to the remaining section of the public address distribution system 1000, and is connected to a plurality of output units, so the configuration is complicated and the physical Since this is a section that can be installed in harsh environments, failures occur most frequently during system construction and operation, and it is difficult to find the cause of the failure. By specifying the path in an abnormal state among the plurality of paths connected to each speaker in this section, the time required for failure response and maintenance can be significantly reduced compared to the existing public address distribution system (1000).

When starting the public address distribution system (1000), if the sound source mode (S300, not shown) is selected in the operation mode selection step (S100), or if all test paths are determined to be in a normal state in the test mode (S200, not shown), the system operates in sound source mode (S300, not shown).

In the sound source mode (S300, not shown), the control unit 100 first generates a sound source signal (S310), and the amplification unit 200 amplifies the sound source signal (S320).

Thereafter, the amplified sound source signal is sensed by the control unit 100 to determine whether the sound source amplifier 210 of the amplification unit 200 is operating normally (S330). If it is determined to be abnormal, the sound source amplifier 210 is connected to an auxiliary amplifier (S330). 220) (S340).

If it is determined that the sound source amplifier 210 is normal, the second connection unit 330 is connected so that the sound source signal is connected to the output unit 400 (S350), and the output unit 400 connects the current, voltage or By sensing the phase, it is possible to monitor whether the final output of the sound source signal is normal (S370).

If the monitoring (S370) result is normal, the speaker is connected so that the sound source signal is output (S380), and the sound source broadcast is serviced through the speaker.

Afterwards, the system operator decides whether to maintain the sound source mode to continue the sound source broadcasting service or change to the test mode to test the individual speaker connection path (S400). When maintaining the sound source mode, the output unit 400 determines again whether the output signal is normal (S370) and then performs the procedure, and when changing to the test mode, the test signal generator 131 generates a test signal (S370) and then Carry out the procedure.

If the monitoring (S370) result is determined to be abnormal, the connection through which the sound source signal is output to the speaker is disconnected (S381), and it is determined whether a normal state can be achieved by adjusting the amplification of the amplification unit 200, and whether or not to adjust the amplification. Select (S390),

When selecting amplification adjustment, adjust the amplification of the sound source amplifier 210 of the test path (TP) judged to be abnormal (S341), determine again whether the state of the test path (TP) is normal (S370), and proceed with the following steps. Perform.

If amplification adjustment is not selected, system operation will be shut down for problem identification and maintenance. At this time, since the test path (TP) determined to be abnormal among the test paths (TP) connected to each output unit 400 can be specified, an individual speaker connection path monitoring function can be implemented.

Each operating procedure of the public address distribution system has its status shared through the control unit 100 and can be controlled by the system manager.

In this way, the present invention provides a function to monitor the status of the path connected to individual speakers and each section of the path in the conventional signal distribution system that simply distributes signals, thereby detecting the location of the fault in the event of a physical failure of some lines. There is an advantage in being able to respond to individual failures through failure response or provision of maintenance information.

Those skilled in the art to which the present invention pertains will understand that the present invention can be implemented in other specific forms without changing its technical idea or essential features. Therefore, the embodiments described above should be understood in all respects as illustrative and not restrictive. The scope of the present invention is indicated by the claims described below rather than the detailed description above, and all changes or modified forms derived from the meaning and scope of the claims and their equivalent concepts should be interpreted as being included in the scope of the present invention. do.

1000: Public address signal distribution system
100: control unit
200: Amplification unit
300: connection part
400: output unit

Claims (23)

A microcomputer including a control unit;
an amplifying unit including amplifying means for amplifying the power of the broadcast signal output from the control unit;
an output unit that selectively connects the broadcast signal amplified by the amplifier to a plurality of output means; and
It includes a connection unit that selectively connects the amplifier and the output unit to configure a physical path through which the amplified broadcast signal is transmitted,
The broadcast signal is either a sound source signal in the audible frequency band or a test signal in the non-audible frequency band,
The control unit,
a signal generator that generates the broadcast signal; and
It includes a signal detection unit that detects the state of the generated broadcast signal,
The amplifying means includes at least one of a sound source amplifier and an auxiliary amplifier for amplifying the sound source signal, and a test amplifier for amplifying the test signal,
The connection part is,
a first connection unit including connection means for outputting one of the amplified sound source signals input from the sound source amplifier and the auxiliary amplifier;
a switching unit including connection means for selecting whether to output the amplified test signal input from the test amplifier; and
It includes a second connection unit including connection means for outputting one of the signals input from the first connection unit and the switching unit,
The signal detection unit,
a sound source signal detection unit that detects a sound source signal amplified between the amplification unit and the second connection unit; and
Detecting the test signal, sensing the voltage, current, and phase of the test signal while the switching unit is disconnected, and comparing the sensed value with a predetermined normal range to determine whether the test signal is normal. A public address broadcast signal distribution system comprising a test signal detection unit. According to claim 1,
A public address signal distribution system, characterized in that the output means is a speaker. delete delete According to claim 1,
A public address signal distribution system with an individual speaker connection path monitoring function, wherein the amplification means is a power amplifier. delete According to claim 1,
A public address signal distribution system wherein the output unit includes a control box that detects the state of a signal connected to the output means. According to clause 7,
A public address signal distribution system, characterized in that the control box and each output means are individually connected one by one. According to clause 7,
The control box is a public address signal distribution system characterized in that it includes a connection means that implements whether the connection part and the output means are connected. According to clause 7,
The control box is a public address signal distribution system characterized in that it includes a communication module that is connected to the control unit through a communication medium and can communicate. According to clause 7,
The control box is a public address signal distribution system characterized in that it includes a sensing unit that detects a broadcast signal input from the connection unit. delete delete delete According to claim 1,
A public address signal distribution system, characterized in that the control unit is provided with a selection unit that individually controls the connection means. According to claim 1,
A public address signal distribution system wherein the control unit includes an interface unit capable of receiving control commands from the outside and outputting status information. delete delete delete delete In a method of operating a public address signal distribution system with individual speaker connection path monitoring function,
generating a test signal in the subaudible frequency band in a microcomputer;
Connecting a path through which the test signal can be input to the control box;
Detecting the state of the test signal in a control box;
After the test signal state detection step, adjusting the amplification intensity of the amplification means by reflecting the detection result;
Generating a sound source signal in the audible frequency band in a microcomputer;
Amplifying the sound source signal with an amplification means;
Connecting a path through which the amplified sound source signal can be input to a control box; and
Comprising: detecting the state of the sound source signal in the control box,
Detecting the state of the test signal or detecting the state of the sound source signal,
detecting the amplified sound source signal or the test signal;
sensing voltage, current, and phase of the amplified sound source signal or the test signal; and
Comparing the sensed value with a predetermined normal range to determine whether the amplified sound source signal or the test signal is normal. According to claim 21,
After the step of amplifying the sound source signal, detecting the state of the amplified sound source signal at the microcomputer; and
A method of operating a public address signal distribution system, further comprising: switching the amplification means to another amplification means by reflecting the detection result of the amplified sound source signal. According to claim 21,
After the step of detecting the state of the sound source signal, a step of adjusting the amplification intensity of the amplification means by reflecting the detection result.