KR100587970B1 - Power amplifier - Google Patents

Abstract

 The present invention relates to a power amplifier, and more particularly, to an amplifier for a central control type PA (PUBLIC ADDRESS) that can be monitored and controlled remotely.

 The present invention is equipped with a variety of detection circuitry in the existing amplifier to collect information (power status, input signal detection, temperature detection, output current monitor, output voltage, etc.) collected from the existing amplifier to the data transfer to the central controller and from the central controller It is an amplifier equipped with a microprocessor that controls the power by receiving ON / OFF signal of the amplifier power. It can control the status of individual amplifier by measuring the temperature inside the amplifier, detecting the amplifier output signal voltage and transmitting it to the central controller. The amplifier can be turned on or off by receiving the power ON-OFF signal from the central control unit. In addition, all microprocessors and their associated amplifiers are given unique IDs to transmit data only when they match a specific address sent from the central controller, so that multiple amplifiers do not interfere with each other even if they are connected to the same line of data. It has the effect of easy scalability. Solenoid terminals 110a and 110b of the present invention, power state detection terminals 550a and 550b, input signal detection terminals 710a and 710b, temperature detection terminals 720a and 720b, output current The monitor terminals 730a and 730b and the output voltage sensing terminals 740a and 740b can be configured to monitor and control in an electrically insulated state from the amplifier, thereby improving the stability of the system. .

 The amplifier of the present invention analyzes an input signal, a power supply state, an output current, an output voltage, a temperature, and the like to determine a power cutoff, output short, output breakdown, overheating, and the like, and has a novel effect as a PA amplifier for real time control. have.

Amplifiers for PAs, PA Systems, Microprocessors, Multiplexers

Description

Power Amplifier

1 is an example of a power supply configuration of a conventional PA amplifier.

2 is an example of a conventional PA amplifier configuration.

3 is a power supply diagram of a PA amplifier according to an embodiment of the present invention.

4 is an example of a configuration of a PA amplifier according to an embodiment of the present invention.

5 is an example of a configuration of a sensor and a transmission processor according to an embodiment of the present invention.

      FIG. 6 is an embodiment of a PA system to which the PA amplifier of FIG. 4 is applied.

  <Description of Symbols for Main Parts of Drawings>

100: AC power supply 110: Relay

110a, 110b: Solenoid terminal 200: Switch to turn on and off

300: safety device 400: power transformer

500: rectification and smoothing unit 510, 520: input terminal

530: current limiting resistor 540: light emitting diodes

550: phototransistor 550a, 550b: power state detection terminal

600: constant voltage circuit 700: preamplifier and bias circuit

700a: Input signal terminal 700b: Input signal ground terminal

701,702: Base terminal signal 705: Impedance stabilizer

710: input signal detection transformer 710a, 720b: input signal detection terminal

720: Demister 720a, 720b: Temperature detection terminal

730: output current detection transformer 730a, 730b: output current monitor terminal

740: Output voltage sensing transformer 740a, 740b: Output voltage sensing terminal

800,800a, 800b: Speaker 900: Multiplexer

910: A / D converter 920: microprocessor

921: selection line 922: output port

923: serial port 1000: sound source

1100a, 1100b: Sound source 2000a, 2000b: PA amplifier device

2100a, 2100b: PA amplifiers 2200a, 2200b: monitors and controls

2210: input detector 2220: power control unit

2230: power detector 2240: temperature detector

2250: output current detector 2260: output voltage detector

2500a, 2500b: Local Processor

 The present invention relates to a power amplifier, and more particularly, to an amplifier for a central control type PA (PUBLIC ADDRESS) that can be monitored and controlled remotely.

  Conventionally, even if a PA amplifier installed in a plurality of places is set to an optimal acoustic state, it is impossible to maintain an optimal state due to abnormal operation or failure of a specific device, and to directly check the operating state of a distributed speaker. Was forced to check performance by circulating through the installed location. In addition, the individual abnormal state of the PA amplifier has also been used in an unknown configuration before directly analyzing the installed PA amplifier.

 The techniques for detecting and controlling abnormalities in the broadcasting system are generally known at the level of the detection of simple failure and the degree of power off.

As a related art, there is a domestic registered utility model publication No. 0341695. This technology includes a keypad unit for outputting a PA system driving signal according to a user's operation, a main power switch for controlling all power sources except the constant power source according to a user's operation, a microphone, and various audio signals. An audio output unit, a mixer unit for controlling an output state by adjusting a volume of an audio signal input from the microphone or an audio signal output through an audio output unit under the control of a controller to be described later, and a signal output from the mixer unit An amplifying unit for amplifying a plurality of speakers, a plurality of speakers outputting the audio signal output from the amplifying unit to the outside so that a predetermined user can listen, and a speaker for selecting a predetermined speaker among the plurality of speakers according to a user's operation And a predetermined speaker among the plurality of speakers under the control of the controller. Connected to the amplifier and the relay unit to output the amplified audio signal through the speaker, and controls the entire system in response to the drive signal of the PA system input through the keypad unit, the voice signal to the speaker selected through the speaker selection unit Or a PA system comprising a control unit configured to output at least one signal of an audio signal, and a power supply unit supplying driving power to operate all components under control of the control unit. And a time checker which checks the operation stop time of the system and outputs the checked operation stop time in real time to the controller, wherein the controller is configured to check whether there is a signal output from the microphone, the mixer, the amplifier, and the speaker. If there is no signal output by judging Control the inter-check unit to count the PA system operation stop time, and determine whether the PA system operation stop time inputted from the time check unit matches a preset time, and if so, control the power supply unit to supply the entire system. Characterized in that the power is cut off.

 However, the above technology is a PA system having a plurality of speakers for one amplification unit, which is a technology that cuts off only power after a certain period of time when there is no speaker output. No means are offered. In addition, when there is no speaker output, it is not possible to determine whether the speaker is abnormal, the amplifier is abnormal, the power source, the signal source can not determine the cause of the output signal abnormality.

 Another technique is Korean Patent Publication No. 0211938. This technology provides individual, group, and whole broadcasting as required by providing the equipment to install and operate for the guidance of passengers, emergency broadcasting and publicity in case of emergency in the history of subway or railway. It is a remote control broadcasting device that can check the status of each history broadcasting device and can notify the operating personnel by generating an alarm when a failure occurs. It is installed in the command center and checks the local station equipment through the communication network through the connection. It sends information and if there is no response, it judges it as communication failure of local station device and saves the alarm and fault history to the operator on the hard disk.In addition, if the response is normal, the next local station is called. Next alarm after saving alarm history on hard disk And a central control unit that calls; A communication network connected to the central control unit by a connection unit; A local station connected to the communication network by a connection unit and installed in each station; It is characterized by comprising a local station broadcasting system for broadcasting from the local station apparatus toward each transmitting destination such as up, down line, waiting room and the like. However, this technology also receives only notification of failures for each sender such as up, down line, waiting room, etc., and does not provide a means of electrically insulating and detecting a specific cause of failure for each device. It is limited in function and it is impossible to electrically isolate and monitor the state of broadcasting equipments under normal conditions.

Therefore, the present invention has been made to solve the above problems, the PA amplifier of the central control method for remotely controlling and monitoring the operator so that the operator can easily and conveniently use a plurality of PA amplifiers installed for transmitting sound. To provide.

To this end, the present invention is equipped with a variety of detection circuitry in the existing amplifier to the information collected from the existing amplifier, such as amplifier input signal size, amplifier output signal size, amplifier output current size, internal temperature of the amplifier and the like data to the central control device It provides an amplifier with a microprocessor which transmits and receives the amplifier power ON-OFF signal from the central controller and controls the power supply. It detects the signal voltage of the amplifier, checks the power status of the amplifier, and measures the temperature inside the amplifier. By detecting and transmitting the amplifier output signal voltage, it is possible to control the status of the individual amplifiers of the PA system, and to control the amplifier power on and off by receiving the power ON-OFF signal from the control computer. Provides an amplifier for PA.

In addition, in the present invention, all the microprocessors and the amplifiers connected thereto are given unique IDs to transmit data only when they match a specific address sent from the central control unit, so that even if a plurality of amplifiers are connected to data lines of the same system, mutual interference All monitors and controllers, ie control terminals, power sensing terminals, input signal terminals, temperature measuring terminals, output current terminals and output voltage sensing terminals are electrically isolated from the amplifier. It is configured to improve the stability of the system by configuring to monitor and control in the same state.

Central amplifier PA amplifier of the present invention can analyze the input signal, power status, output current, output voltage, temperature, etc. for each amplifier to determine the power cut, output short, output disconnection, overheating, etc. The purpose is to provide a centralized PA amplifier.

 The technical problem to be achieved by the present invention is to provide a PA for a central control system that can be remotely controlled and monitored so that the operator can easily and conveniently use a plurality of PA amplifiers installed to transmit sound.

 Another technical problem to be solved by the present invention is to include various detection circuits in an amplifier, collect a plurality of detection information from the amplifier, convert the data into a central controller, and receive the amplifier power ON-OFF signal from the central controller. To provide an amplifier for a PA having a microprocessor for controlling the power supply.

 Another technical problem to be solved by the present invention is to provide an amplifier for a PA that can detect the signal voltage of the amplifier, check the power supply status of the amplifier, measure the internal temperature of the amplifier, and detect and transmit the amplifier output signal voltage and current. There is.

 Another technical problem to be achieved by the present invention is easy expansion without causing mutual interference even when a plurality of amplifiers are connected to data lines of the same system, and a control terminal, a power sensing terminal, an input signal terminal, and a temperature measuring terminal. In addition, the present invention provides an amplifier for a PA that can monitor and control an output current terminal and an output voltage sensing terminal electrically isolated from an amplifier.

Another technical problem to be achieved by the present invention is to analyze the input signal, power state, output current, output voltage, temperature, etc. for each amplifier to determine the power cutoff, output short, output breakdown, overheating, etc. It is to provide a control amplifier for PA.

 In order to achieve the above technical problem, it will be described in detail with reference to the accompanying drawings, the amplifier for the central control system according to the present invention.

 1 schematically shows a power supply configuration of a conventional PA amplifier.

 First, when power is supplied from the commercial AC power supply 100, when the switch 200 for turning the power on and off is turned on, power is supplied to the power transformer 400 through a safety device 300 such as a fuse. The secondary side of the power supply transformer 400 supplies the secondary side AC power required by the circuit, and is supplied with a DC power voltage primarily from the rectifying and smoothing unit 500 that receives the secondary power. The DC power supply voltage supplied from the rectifying and smoothing unit 500 supplies the stabilizing power V + required by the circuit to the ground reference through the constant voltage circuit 600 again.

 2 is an example of a conventional PA amplifier configuration. In FIG. 2, the power connection is omitted.

 The PA amplifier of FIG. 2 is an example of a push-pull amplifier having an output transformer OT. The input signal for amplification is supplied to the input signal terminal 700a and the input signal ground terminal 700b and amplified through the conventional preamplifier and bias circuit 700. The output of the preamplifier and bias circuit 700 outputs the respective base terminal signals 701 and 702 for driving the output transistors Tr1 and Tr2 of the push-pull amplifier and outputs the output transistors Tr1 and Tr2 of the push-pull amplifier. The collector terminals are connected to both ends of the primary side of the output transformer OT, respectively, and the power supply voltage V + is connected to the center tap of the primary winding of the output transformer OT. Emitter compensation resistors Re1 and Re2 are connected to the emitters of the output transistors Tr1 and Tr2, respectively. The emitters of Tr1 are connected to ground through Re1, and the emitters of Tr2 are connected to ground through Re2. . Accordingly, the current amplified by the transistors Tr1 and Tr2 flows to the ground through Tr1 and Re1, Tr2 and Re2 from V + connected to the center tap of the output transformer OT, respectively. In this case, the secondary winding of the output transformer OT may include taps TP1, TP2, TP3, and TP4 according to the impedance of the speaker 800 used, and the grounded terminal of the secondary winding of the OT and the tap. Among the TP1, TP2, TP3, and TP4, a terminal corresponding to the impedance of the corresponding speaker 800 is connected to the driving terminal of the speaker 800.

 3 is a schematic power supply diagram of a PA amplifier according to an embodiment of the present invention.

 When power is supplied from the commercial AC power supply 100, when the switch 200 to turn it on / off is turned on, it passes through a safety device such as a fuse 300, and also a relay 110. Power is supplied to the power transformer 400 via the contact driven by the. In this case, the solenoid terminals 110a and 110b of the relay 110 may be electrically insulated from the PA amplifier as terminals for driving on / off power from the outside of the amplifier.

 The secondary side of the power supply transformer 400 supplies the secondary side AC power required by the circuit, and is supplied with a DC power voltage primarily from the rectifying and smoothing unit 500 that receives the secondary power. The output terminal of the rectifying and smoothing unit 500 is a ground line and a power line, wherein the power line is connected to the input terminals 510 and 520 through a diode, and separately from the input terminals 510 and 520. Emergency DC power to emergency AC power may be connected. In addition, in the example of FIG. 3, the input terminals 510 and 520 are respectively connected through one diode. However, if necessary, the diodes may be configured as diode bridges to be connected to a propagation current. The output terminal of the smoothing unit 500 has a current limiting resistor 530 and a light emitting diode 540 connected to the ground in series with the output terminal of the smoothing unit 500 from the output terminal of the smoothing unit 500, the input terminals 510 and 520, and the like. It can be configured to emit light when the power supplied is a predetermined voltage. The light emitting diode 540 is configured as a phototransistor 550 and a photocoupler, and when the power supplied from the output terminal, the input terminals 510 and 520, etc. of the smoothing part 500 becomes a predetermined voltage, When the light emitting diode 540 emits light, a photocurrent flows to the phototransistor 550. The photocurrent flowing to the phototransistor 550 is sensed in the state of being electrically insulated from the amplifier by the power state detection terminals 550a and 550b. The DC power supply voltage supplied from the rectifying and smoothing unit 500 supplies the stabilizing power V + required by the circuit to the ground reference through the constant voltage circuit 600 again.

Figure 4 is an example of a configuration of a PA amplifier according to an embodiment of the present invention, the connection of the power supply is omitted. The PA amplifier of FIG. 4 is an example of a push-pull amplifier having an output transformer OT.

The input signal for amplification is supplied to the input signal terminal 700a and the input signal ground terminal 700b and amplified through the conventional preamplifier and bias circuit 700. The primary winding of the input signal detection transformer 710 is connected between the input signal terminal 700a and the input signal ground terminal 700b through an impedance stabilizing resistor 705 to detect the input signal. At this time, the impedance stabilizing resistor 705 is a function that does not affect the input impedance of the signal supplied between the input signal detection terminals 710a and 710b and adopts a resistor large enough to minimize the variation of the input impedance. do. The secondary side of the input signal detection transformer 710 is electrically insulated from the primary side and transmits the value of the input signal to the input signal detection terminals 710a and 710b.

 The output of the preamplifier and bias circuit 700 outputs the respective base terminal signals 701 and 702 for driving the output transistors Tr1 and Tr2 of the push-pull amplifier and outputs the output transistors Tr1 and Tr2 of the push-pull amplifier. Each collector terminal is connected to both ends of the primary side of the output transformer OT, and a power supply voltage V + is connected to the center tap which is the midpoint of the primary side winding of the output transformer OT. In the preamplifier and bias circuit 700, the output transistors Tr1 and Tr2 of the heating element and the push-pull amplifier are equipped with a heat sink to dissipate heat generated from the device to the outside. By installing the Mr 720, the heating temperature can be sensed from the outside. The dummyster 720 can be used in both the PTC type of the resistance increases with increasing temperature, the NTC type of the resistance decreases with increasing temperature and the resistance value according to the temperature of the dummyster 720 is The temperature detection terminals 720a and 720b are configured to monitor externally. In particular, the dummyster 720 is electrically insulated from the heat generating unit and at the same time provided with a good heat transfer to electrically insulate.

 Emitter compensation resistors Re1 and Re2 are connected to the emitter of the output transistor, respectively, the emitter of Tr1 is connected to ground through Re1, and the emitter of Tr2 is connected to ground through Re2. Accordingly, the current amplified by the transistors Tr1 and Tr2 flows to the ground through Tr1 and Re1, Tr2 and Re2 from V + connected to the center tap of the output transformer OT, respectively. Therefore, the current amplified by the transistors Tr1 and Tr2 is represented as a voltage across the emitter compensation resistors Re1 and Re2. The primary winding of the output current sensing transformer 730 is connected to both ends of the emitter compensation resistors Re1 and Re2, that is, the emitter terminals of the transistors Tr1 and Tr2, respectively, so that the output current is insulated through the secondary winding. Configure it for monitoring. The output of the secondary winding can be externally monitored by the output current monitor terminals 730a and 730b.

 The secondary winding of the output transformer OT may include taps TP1, TP2, TP3, TP4, and the like, depending on the impedance of the speaker 800 used, one grounded terminal of the secondary winding of the OT and the tap TP1. Among the terminals TP2, TP3, and TP4, a terminal corresponding to the impedance of the corresponding speaker 800 is connected to the driving terminal of the speaker 800. The present invention further includes an output voltage sensing winding OTC for sensing an output voltage in a secondary winding of an output transformer OT having taps TP1, TP2, TP3, and TP4 according to the impedance of the speaker 800. It is connected to the primary side of the transformer 740, and transmits the output voltage electrically isolated from the secondary side of the output voltage sensing transformer 740 to the output voltage sensing terminals 740a and 740b.

 5 shows an example of the configuration of a sensor and a transmission processor according to an embodiment of the present invention.

 Power state detection terminals 550a and 550b, input signal detection terminals 710a and 710b, temperature detection terminals 720a and 720b, output current monitor terminals 730a and 730b, output voltage detection Terminals 740a, 740b, etc. convert the sensed signals through respective buffer amplifiers into analog signals of appropriate magnitude, and each analog signal is multiplexed by a select line 921 of the microprocessor 920. 900).

 The sensing signal selected by the multiplexer 900 is converted into digital data by the A / D converter 910, and preferably, 8-bit resolution. In addition, the power state detection terminals 550a and 550b of the above-described detection signals have a voltage output of the power supply circuit when the photocoupler connected thereto applies a photocoupler having an input proportional output as well as a simple on / off type. In addition, the voltage of the voltage output can be monitored, and when the photocoupler is a simple on / off type, the A / D converter 910 can be connected to one bit of the input port of the microprocessor 920 without converting it into digital data. .

 The solenoid terminals 110a and 110b amplify one bit signal of the output port 922 of the microprocessor 920 with a buffer amplifier to supply a signal for driving a relay for turning on and off the amplifier. Supply to terminals 110a and 110b. In addition, the control terminal of the present invention may control the switching of the speaker terminal by providing a relay to the speaker terminal of the amplifier and amplifying and supplying another bit signal of the output port 922 of the microprocessor 920 as a buffer amplifier. have.

A / D converted power state detection terminals 550a and 550b, input signal detection terminals 710a and 710b, temperature detection terminals 720a and 720b, output current monitor terminals 730a and 730b ), Data such as the output voltage detection terminals 740a and 740b are stored in the microprocessor 920 and can be transmitted and received with the central controller transmitted and received through the serial port 923. All transmit and receive data is identified by a unique ID number assigned to each local processor connected to each of the amplifiers, and all processors are accessed for instructions from the central control unit for their ID.

With the above configuration, the amplifier of the present invention can monitor the power supply state, input signal detection, temperature detection, output current monitor, output voltage, etc. in a state insulated from the amplifier power supply, and at the same time control the power supply of the amplifier on and off. It becomes possible.

 FIG. 6 schematically shows an embodiment of a PA system to which the PA amplifier of FIG. 4 is applied. The PA system of FIG. 6 includes a plurality of sound source units 1000, a plurality of PA amplifier devices 2000a and 2000b, a central controller 3000, a control computer 4000, and a plurality of speaker units 5000. The PA amplifiers 2000a and 2000b include PA amplifiers 2100a and 2100b, monitors and controllers 2200a and 2200b, and local processors 2500a and 2500b, and the monitors and controllers 2200a and 2200b are input detectors 2210. ), A power controller 2220, a power detector 2230, a temperature detector 2240, an output current detector 2250, and an output voltage detector 2260.

 The sound source unit 1000 inputs sound sources 1100a and 1100b and transmits the sound sources 1100a and 1100b to the PA amplifier devices 2000a and 2000b. The sound source unit 1000 includes sound devices such as a microphone. That is, the signal of the sound source 1000 is transmitted to a plurality of PA amplifier devices such as the PA amplifier 2100a and the PA amplifier 2100b, and each amplifier output drives the corresponding speaker 800a or 800b.

 The PA amplifier devices 2000a and 2000b include PA amplifiers 2100a and 2100b, monitors and controllers 2200a and 2200b, local processors 2500a and 2500b, and centrally control sound signals received from the sound source unit 1000. Control by the control signal from the device 3000 and transmits to the speaker unit (5000). In addition, the PA amplifiers 2000a and 2000b perform input signal detection, power supply control, power supply detection, temperature detection, output current detection, and output voltage detection of each of the PA amplifiers 2100a and 2100b.

The PA amplifiers 2100a and 2100b amplify and adjust the sound signals received from the sound source unit 1000 and transmit them to the speaker unit 5000. At this time, the PA amplifiers 2100a and 2100b supply power to the PA amplifiers 2100a and 2100b according to the power control signal from the power control unit 2220 of the monitor and the controllers 2200a and 2200b.

The monitor and the controller 2200a and 2200b include an input detector 2210, a power controller 2220, a power detector 2230, a temperature detector 2240, an output current detector 2250, and an output voltage detector 2260. The amplifier is driven from the power control signals received from the local processors 2500a and 2500b, and the PA amplifiers 2100a and 2100b detect the input signal, the power signal, the temperature, the output current and the output voltage, and then the local processors 2500a and 2500b. ) To monitor the status of the PA amplifiers 2100a and 2100b. The monitor and the controllers 2200a and 2200b may be configured as analog signal processing circuits. That is, the signals of the monitor and the controllers 2200a and 2200b are connected to the local processors 2500a and 2500b and the like, and the local processors 2500a and 2500b are connected to the central controller 3000 through the serial port 923. ).

The input detector 2210 detects sound signals received by the PA amplifiers 2100a and 2100b from the sound source unit 1000 and transmits the sound signals to the local processors 2500a and 2500b. That is, the signals detected by the input signal detection terminals 710a and 710b in the input detection unit 2210 are transmitted to the local processors 2500a and 2500b.

The power controller 2220 supplies power to the PA amplifiers 2100a and 2100b from a power control signal received from the local processors 2500a and 2500b. That is, the PA amplifiers 2100a and 2100b are driven to be turned on and off according to the signals received from the solenoid terminals 110a and 110b in the power control unit 2220. In particular, the present invention includes solenoid terminals 110a and 110b electrically isolated from the PA amplifier so as to be driven on and off in accordance with a power control signal received from the outside of the PA amplifier.

The power detector 2230 detects the supplied power and transmits it to the local processors 2500a and 2500b. That is, the signals detected by the power state detection terminals 550a and 550b in the power detector 2230 are transmitted to the local processors 2500a and 2500b.

The temperature detector 2240 includes a temperature sensor and detects the temperatures of the PA amplifiers 2100a and 2100b and transmits them to the local processors 2500a and 2500b. That is, the signals detected by the temperature detection terminals 720a and 720b in the temperature detector 2240 are transmitted to the local processors 2500a and 2500b.

The output current detector 2250 detects the output currents of the PA amplifiers 2100a and 2100b and transmits them to the local processors 2500a and 2500b. That is, the signals detected by the output current monitor terminals 730a and 730b in the output current detector 2250 are transmitted to the local processors 2500a and 2500b.

The output voltage detector 2260 detects output voltages of the PA amplifiers 2100a and 2100b and transmits them to the local processors 2500a and 2500b. That is, the signals detected by the output voltage detection terminals 740a and 740b in the output voltage detector 2260 are transmitted to the local processors 2500a and 2500b.

The local processors 2500a and 2500b convert signals received from the input detector 2210, the power detector 2230, the temperature detector 2240, the output current detector 2250, and the output voltage detector 2260 into digital data. The serial port 923 is transmitted to the central controller 3000. Local processors 2500a and 2500b include a multiplexer 900, an A / D converter 910, and a microprocessor 920. The local processors 2500a and 2500b convert the amplifier control signal received from the central processing unit 3000 into an analog signal and transmit the converted signal to the power control unit 2220. When the local processors 2500a and 2500b are connected to the central controller 3000 and the serial port 923, up to 16 local processors can be accessed per individual bus. As an example of this, in FIG. 6, the accesses are classified by unique IDs such as # 00 to # 15, # 16 to # 31, # 32 to # 47, and # 48 to # 63, and further expansion is possible. In addition, when connecting the local processor (2500a, 2500b) with the central control unit 3000, it can be connected in a wired manner, such as using RS422, it is also possible to connect using a wireless modem.

The central controller 3000 performs a function of collecting and processing various data. That is, the central controller 3000 generates a power control signal according to the operator's command information received from the control computer 4000, and transmits the power control signal to the local processors 2500a and 2500b through the serial port 923, and input detection unit 2210. Control signals received from the power supply detector 2230, the temperature detector 2240, the output current detector 2250, the output voltage detector 2260, and the like through the local processors 2500a and 2500b and the serial port 923. To 4000.

The control computer 4000 transmits all received information to the operator through the screen. In addition, the control computer 4000 determines whether the PA amplifiers 2100a and 2100b are abnormal based on the received signals, and transmits them to the operator through the screen. Therefore, the control computer 4000 is equipped with the core operating software of the present invention to deliver all the received information and the like to the operator through the screen.

One embodiment of the PA amplifier of the central control method of the present invention has been described, but the present invention is not limited thereto, and various modifications and implementations are possible by one of ordinary skill in the art to which this technology belongs. Of course, more modifications and variations are possible within the scope of the claims set forth herein.

 As described above, the present invention includes various detection circuits in the existing amplifier and transmits the information collected from the existing amplifier (power state, input signal detection, temperature detection, output current monitor, output voltage, etc.) to the central controller. And an amplifier having a microprocessor for controlling the power by receiving the amplifier power ON-OFF signal from the central controller, and measuring the internal temperature of the amplifier, detecting the amplifier input / output signal voltage, and transmitting the signal to the central controller. The power supply of the amplifier can be turned on or off by receiving the power ON-OFF signal from the central controller.

 In addition, all microprocessors and their associated amplifiers are given unique IDs to transmit data only when they match a specific address sent from the central controller, so that multiple amplifiers do not interfere with each other even if they are connected to the same line of data. It has the effect of easy scalability.

 Solenoid terminals 110a and 110b of the present invention, power state detection terminals 550a and 550b, input signal detection terminals 710a and 710b, temperature detection terminals 720a and 720b, output current The monitor terminals 730a and 730b and the output voltage sensing terminals 740a and 740b can be configured to monitor and control in an electrically insulated state from the amplifier, thereby improving the stability of the system. .

 The amplifier of the present invention analyzes an input signal, a power supply state, an output current, an output voltage, a temperature, and the like to determine a power cutoff, output short, output breakdown, overheating, and the like, and has a novel effect as a PA amplifier for real time control. have.

Claims (11)

In the amplifier for PA, AC power supply 100; A switch 200 for turning on / off the supply of power from the AC power supply 100; A safety device 300 connected in series with the switch 200 and configured of a fuse; A relay 110 connected to the safety device 300 in series; A power supply 400 which supplies power to the primary side via a contact point driven by the relay and supplies AC power required by the circuit of the PA amplifier on the secondary side; Rectification and smoothing unit 500 for supplying the AC power supplied from the secondary side of the power transformer 400 to a DC power supply voltage; Input terminals 510 and 520 connected to the power lines through diodes of the ground line and the power line of the output terminal of the rectifying and smoothing unit 500; A current limiting resistor 530 connected to the power line of the rectifying and smoothing unit 500; A light emitting diode 540 which is connected to ground in series with the current limiting resistor 530 and emits light when the power becomes a predetermined voltage; And a constant voltage circuit 600 for supplying a stabilization power (V +) required by a circuit of a PA amplifier to the ground reference based on the DC power voltage supplied from the rectifying and smoothing unit 500. An amplifier for PA. The method of claim 1, wherein the relay 110 The solenoid terminals 110a and 110b are electrically insulated from the PA amplifier and drive the power input to the power transformer 400 on / off according to a power control signal received from the PA amplifier. Amplifier for PA, characterized in that provided with. The method of claim 1, wherein the input terminal (510, 520) is An amplifier for PA, characterized in that a separate emergency DC power or emergency AC power is connected. The method of claim 1, wherein the light emitting diode 540 is Configured as a phototransistor 550 and a photocoupler, When the light emitting diode 540 emits light, a photocurrent flows to the phototransistor 550. Wherein the photocurrent flowing to the phototransistor (550) is sensed in a state that is electrically isolated from the amplifier in the power state detection terminals (550a, 550b). In the amplifier for PA, Input signal terminals 700a and 700b for providing an input signal for amplification in a PA amplifier; A preamplifier and bias circuit 700 for receiving and amplifying an input signal through the input signal terminals 700a and 700b; An input signal detection transformer 710 for connecting a primary winding through an impedance stabilizing resistor 705 between the input signal terminals 700a and 700b and detecting an input signal at both ends of the secondary winding; Output transistors (Tr1 and Tr2) of a push-pull amplifier driven using the outputs of the preamplifier and bias circuits 700 as respective base terminal signals; An output transformer (OT) having a collector terminal of the output transistors Tr1 and Tr2 of the push-pull amplifier connected to both ends of the primary side, and a power supply voltage V + connected to the center tap of the primary winding. PA amplifier, characterized in that. The method of claim 5, wherein the impedance stabilizing resistor (705) is And an amplifier having a resistance value large enough not to affect an input impedance of a signal supplied between the input signal detection terminals (710a, 710b). The method of claim 5, wherein the input signal detection transformer 710 is And the secondary side is electrically insulated from the primary side, and configured to transmit the value of the input signal to the input signal detection terminals (710a, 710b). 6. The preamplifier and bias circuit 700 of claim 5 wherein A heat sink for dissipating heat generated from the heating element and the elements of the output transistors Tr1 and Tr2 of the push-pull amplifier to the outside; It is installed on the heat sink or the heating element is electrically insulated from the heat generating portion and at the same time to ensure good heat transfer, the dummyster (720) for detecting the heating temperature from the outside; And a temperature detection terminal (720a, 720b) configured to monitor the resistance value according to the temperature of the dummyster (720) from the outside. The method of claim 5, The output transistors Tr1 and Tr2 include a first output transistor Tr1 and a second output transistor Tr2; The emitter of the first output transistor Tr1 is provided with a first emitter compensation resistor Re1, and the emitter of the first output transistor Tr1 is provided through the first emitter compensation resistor Re1. Connected to ground; The emitter of the second output transistor Tr2 is provided with a second emitter compensation resistor Re2, and the emitter of the second output transistor Tr2 is connected to the second emitter compensation resistor Re2. Connected to ground; Both ends of the primary winding are connected to the emitter terminal of the first output transistor Tr1 and the emitter terminal of the second output transistor Tr2, and insulate the output current of the PA amplifier through the secondary winding. An output current sensing transformer 730 configured to monitor in a closed state; Amplifier for PA, characterized in that the output of the secondary winding of the output current sensing transformer 730 is connected to the output current monitor terminals (730a, 730b). The method of claim 5, wherein the output transformer (OT) is A secondary winding having taps (TP1, TP2, TP3, TP4) that can be selected and connected according to the impedance of the speaker 800 used; An output voltage sensing winding (OTC) further provided on the secondary winding of the output transformer (OT) to sense the output voltage of the PA amplifier; Output voltage sensing transformer 740 for connecting the output voltage sensing winding (OTC) to the primary side and transferring the output voltage of the PA amplifier to the output voltage sensing terminals 740a and 740b while being electrically insulated from the secondary side. PA amplifier, characterized in that provided with. Power state detection terminals 550a and 550b, input signal detection terminals 710a and 710b, temperature detection terminals 720a and 720b, output current monitor terminals 730a and 730b, output voltage detection terminals 740a and 740b, solenoids In the PA amplifier having the terminals (110a, 110b), The power state detection terminals 550a and 550b, the input signal detection terminals 700a and 700b, the temperature detection terminals 720a and 720b, the output current monitor terminals 730a and 730b, and the output voltage detection terminals 740a and 740b. Buffer amplifiers for amplifying a signal from and a signal input to the solenoid terminals 110a and 110b to an appropriate magnitude; A multiplexer 900 connected to the output signals of the buffer amplifiers and selected by the selection line 921 of the microprocessor 920; An A / D converter 910 for converting the signal selected by the multiplexer 900 into digital data; A microprocessor 920 for storing A / D converted data in the A / D converter 910 and transmitting and receiving data through a serial port 923; Connected to the solenoid terminals 110a and 110b, a bit signal of the output port 922 of the microprocessor 920 is amplified by a buffer amplifier and supplied to the solenoid terminals 110a and 110b to supply power to the amplifier. And an on / off relay.

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