CN217849655U - Multifunctional megaphone - Google Patents

Abstract

The utility model provides a multi-functional megaphone belongs to megaphone technical field. The utility model discloses a host system, audio frequency drive module, audio frequency amplification module and power amplifier module still include serial ports output module, serial ports switching mouth module, communication interface module, wherein, host system is used for exporting audio signal and gives audio frequency amplification module, audio frequency drive module is used for the drive the audio frequency amplification module, audio frequency amplification module is used for amplifying the back to audio signal, exports for power amplifier module, serial ports output module's input links to each other with host system's output, serial ports output module's output links to each other with the input of serial ports switching mouth module, the output of serial ports switching mouth module links to each other with communication interface module. The utility model discloses the function is abundant, and the circuit is simple, and is with low costs, and application scope is wide, is favorable to the function to be extended.

Description

Multifunctional megaphone

Technical Field

The utility model relates to a power supply circuit technical field, concretely relates to multi-functional megaphone.

Background

The megaphone is the equipment of just sending audio signal outward to the name of thinking, and current megaphone is generally only sound broadcasting function, and the part also can increase some charactron display function, but, and the general use scene is single, is unfavorable for the function to expand.

SUMMERY OF THE UTILITY MODEL

For solving the problem among the prior art, the utility model provides a multi-functional megaphone.

The utility model discloses multi-functional megaphone, including host system, audio drive module, audio amplification module and power amplifier module, still include serial ports output module, serial ports switching mouth module, communication interface module, wherein, host system is used for exporting audio signal and gives the audio amplification module, the audio drive module is used for the drive the audio amplification module, the audio amplification module is used for exporting the power amplifier module to audio signal amplification back, serial ports output module's input links to each other with host system's output, serial ports output module's output links to each other with the input of serial ports switching mouth module, the output of serial ports switching mouth module links to each other with communication interface module.

The utility model discloses do further improvement, still include a display module, display module links to each other with serial ports output module's output.

The utility model discloses make further improvement, still include first display module or/and second display module, first display module links to each other with serial ports output module's output, the second display module links to each other with communication interface module's output.

The utility model discloses make further improvement, first display module is a plurality of LED lamps of charactron or array, the second display module includes the display screen.

The utility model discloses make further improvement, the communication interface module include RS-485 communication module and with the output interface that RS-485 communication module output links to each other.

The utility model discloses make further improvement, the communication interface module still includes interface switching module and RS-232 communication module, the one end of interface switching module links to each other with serial ports switching interface module's output, and termination RS-485 communication module's input is selected to the first choice of the other end, and termination RS-232 communication module input is selected to the second, RS-232 communication module's output links to each other with output interface.

The utility model discloses make further improvement, interface switching module adopts change over switch chip or dial switch.

The utility model discloses do further improvement, multi-functional megaphone still includes pronunciation receiving module and GPIO interface, pronunciation receiving module is used for receiving pronunciation, the GPIO interface is used for host system and outside to extend the communication of function chip.

The utility model discloses make further improvement, multi-functional megaphone still includes storage module and alarm module, storage module and alarm module link to each other with host system respectively.

The utility model discloses make further improvement, host system is 4G 5G communication module.

Compared with the prior art, the beneficial effects of the utility model are that: the shouting function can be realized, the display function of a basic nixie tube and an LED display module can also be realized, in addition, a universal communication interface is supported, the universal communication interface can be connected with most of equipment through the communication interface, the function expansion is realized, for example, the universal communication interface can be connected with a display screen, and prompt information such as forest fire prevention and the like can be broadcasted and displayed if the universal communication interface is used in occasions such as parks and the like; if in the open air, can be according to received information and show on the display screen, for example noise, air quality etc. thereby make the utility model discloses the function is abundant, and expansibility is strong, does not confine to single scene and uses.

Drawings

In order to illustrate the present application or prior art more clearly, a brief description of the drawings needed for the description of the embodiments or prior art will be given below, it being clear that the drawings in the following description are some embodiments of the present application and that other drawings can be derived from them by a person skilled in the art without inventive effort.

FIG. 1 is a block diagram of the present invention;

fig. 2A and fig. 2B are schematic circuit diagrams of the main control module of the present invention;

fig. 3 is a schematic circuit diagram of the audio driving module of the present invention;

fig. 4 is a schematic circuit diagram of the audio amplification module of the present invention;

FIG. 5 is a schematic diagram of a power amplifier module circuit;

FIG. 6 is a schematic circuit diagram of an audio output module;

FIG. 7 is a schematic circuit diagram of a GPIO interface, an audio receiving module and an alarm module;

FIG. 8 is a schematic circuit diagram of a serial port output module, a serial port adapter module, and a communication interface module;

FIG. 9 is a block diagram of a power circuit configuration;

FIG. 10 is a schematic diagram of an embodiment of a power circuit.

FIG. 11 is a schematic circuit diagram of the clock power supply unit of the megaphone of the present invention;

fig. 12 is a schematic diagram of a clock module circuit.

Detailed Description

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "including" and "having," and any variations thereof, in the description and claims of this application and the description of the above figures are intended to cover non-exclusive inclusions. The terms "first," "second," and the like in the description and claims of this application or in the above-described drawings are used for distinguishing between different objects and not for describing a particular order.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings.

As shown in fig. 1, the utility model discloses multi-functional megaphone, amplify module and power amplifier module including host system, audio frequency drive module, audio frequency, host system is used for exporting audio signal and gives the audio frequency and amplify the module, audio frequency drive module is used for the drive the audio frequency amplifies the module, the audio frequency is amplified the module and is used for enlargiing the back to audio signal, exports for the power amplifier module, and this part module mainly realizes the function of megaphone, and is exactly to play out through the form of broadcasting with storage or received information. In addition, the audio interface is expanded, external connection of other power amplifier equipment is supported, and better playing effects such as stereo and the like are achieved.

The application scene of this example is extensive, can carry out the function expansion, for example, in the convenience store, cooperate human body detection sensor, when the master control module detects someone, welcome shouting, or in community or collective management activity, broadcast the audio frequency of recording etc. as required.

In addition, the multifunctional megaphone of this example further comprises a serial port output module, a serial port switching port module and a communication interface module, wherein the input end of the serial port output module is connected with the output end of the main control module, the output end of the serial port output module is connected with the input end of the serial port switching port module, and the output end of the serial port switching port module is connected with the communication interface module.

Preferably, the mobile terminal further comprises or is externally connected with a first display module or/and a second display module, wherein the first display module is connected with the output end of the serial port output module, and the second display module is connected with the output end of the communication interface module.

The first display module of the embodiment is a nixie tube capable of identifying TTL level signals through a serial port or a plurality of LED lamps of an array, the second display module of the embodiment is a display screen, and display of various information can be supported, for example, prompt information such as forest fire prevention can be broadcasted and displayed if the display screen is used in occasions such as parks; if in the open air, can be according to received information and show on the display screen, for example noise, air quality etc. thereby make the utility model discloses the function is abundant, and expansibility is strong, does not confine to single scene and uses.

The multifunctional megaphone is further provided with a voice receiving module and a GPIO interface, wherein the voice receiving module is used for receiving voice, the GPIO interface is used for communication between the main control module and an external function expanding chip, and in addition, the multifunctional megaphone is further provided with an alarm module which is respectively connected with the main control module through the alarm module.

Can know through above-mentioned functional module, the utility model discloses not only can realize shouting the function, can also realize basic charactron, LED display module's demonstration function, in addition, support general communication interface and GPIO interface, can link to each other with most equipment or chip, realize corresponding function expansion.

As shown in fig. 2A and 2B, the main control module of this embodiment adopts the 4G communication module to implement the functions of main control and remote communication, and adopts the processing chip of the 4G communication module to implement data processing, so that one main control chip is reduced, the circuit is simple, and the cost is effectively reduced. The module is provided with a storage U16, so that the requirement of simple storage is met.

As shown in fig. 3-5, the driver chip U21 of this embodiment outputs a 9V driving power to drive the audio amplifier module to operate, and the audio amplifier module receives the audio signal output by the 4G communication module, amplifies the audio signal, outputs the amplified audio signal to the power amplifier module for processing, and then outputs the amplified audio signal to the power amplifier through the interface J2 for playing.

As shown in fig. 6, the present embodiment is further provided with an AUX interface U5 connected to the 4G communication module for externally connecting a power amplifier module, thereby achieving better playing effects such as stereo surround.

As shown in fig. 7, the GPIO interface J5 of this example is connected to the 4G communication module, so as to implement communication between the 4G communication module and other chips or functional devices. The digital microphone is further provided with an MIC audio port for collecting audio signals, the collected audio signals are output to the 4G communication module through the plurality of filter capacitors connected in parallel and the ESD anti-static device, and then are processed through the 4G communication module and output or sent out through voice, so that interaction with a far end is realized.

The alarm module is connected with the 4G communication module to achieve an alarm function, specifically, the alarm module comprises an MOS tube D21 and a triode Q8, the base of the triode Q8 is connected with the control pin of the 4G communication module, the emitting electrode of the triode Q8 is grounded, the collecting electrode is connected with the grid electrode of the MOS tube D21 through a resistor, the source electrode of the MOS tube D21 is connected with a power supply, and the drain electrode of the MOS tube D21 is connected with an alarm lamp. Of course, an audible alarm or the like may be used.

As shown in fig. 8, the communication interface module of this example includes an RS-485 communication module and an output interface connected to an output end of the RS-485 communication module. The communication interface module also comprises an interface switching module and an RS-232 communication module, wherein one end of the interface switching module is connected with the output end of the serial port switching interface module, the first selection end of the other end of the interface switching module is connected with the input end of the RS-485 communication module, the second selection end of the interface switching module is connected with the input end of the RS-232 communication module, and the output end of the RS-232 communication module is connected with the output interface.

The interface switching module of the embodiment can adopt a switch chip or a dial switch and the like, the output interface of the embodiment is three-one interface, the output of the IO port of the RS-232, RS-485 or 4G communication module is realized, and the circuit design is simpler.

As shown in fig. 9, the utility model discloses still include power module, power module includes power input module, port protection module, input filter module, voltage regulation module, first voltage conditioning module, second voltage conditioning module, output filter module and the protection module that sets gradually according to the current flow direction, wherein, protection module output steady voltage is given megaphone back stage circuit, still includes voltage sampling module, voltage sampling module sets up the output of input filter module, voltage sampling module's sample end links to each other with megaphone's the master control module input.

In addition, because this example power input module is the power input who connects power adapter 24V, and external voltage is too high, can not directly use, consequently, need drop the power to 5V output, supply partial components and parts to use, original voltage control module main function is to drop external high voltage to 5V's steady voltage output, guarantees the stability of one-level switching voltage, no matter how undulant of external voltage, through the utility model discloses power supply circuit handles the back, all handles into straight voltage curve to guarantee the power stability of back level.

In order to meet the requirements of other chips, the power conversion module is arranged, and 5V stable voltage output by the protection module is converted into chip working voltages of 3.3V, 1.8V and the like. Because the 5V voltage output by the preceding stage is stable voltage, the circuit of the voltage conversion module can be processed by voltage reduction chips such as LDO chips commonly used in the market.

As shown in fig. 10, the present example further includes a first power indication module and a second power indication module, where the first power indication module is disposed at an input end of the voltage sampling module and is used for indicating whether to connect an external power supply; the second power supply indicating module is arranged at the input end of the protection module and used for indicating whether the power supply circuit is in a working state or not. The first power supply indicating module and the second power supply indicating module of the embodiment both adopt light emitting diodes.

The port protection module of the embodiment comprises a transient suppression unit and an anti-back-striking unit, wherein the transient suppression unit adopts a transient suppression diode, a voltage stabilizing diode or an electrostatic protection tube and the like, the anti-back-striking unit adopts more than one diode connected in parallel, and the anode of the diode is connected with the power input module.

The input filter module of the present example is a polar capacitor C169 connected in parallel with the circuit, and the negative electrode of the polar capacitor C169 is grounded.

The voltage sampling module of the embodiment comprises resistors R86, R87 and R88 and a capacitor C18, wherein the resistors R86 and R87 are connected in series, one end of the resistor R86 is connected with the output end of the input filtering module, the other end of the resistor R88 is grounded, one end of the resistor R88 is connected between the resistors R86 and R87, and the other end of the resistor R88 is respectively connected with the grounded capacitor C18 and the sampling end. The main control module can monitor the voltage of the voltage source in real time through the sampling end.

The voltage regulation module of this example adopts step-down chip U4, the output of step-down chip U4 is equipped with the booster pump, the voltage after the output pressure boost. The voltage pump comprises a capacitor C25, one pin of the voltage reduction chip U4 is connected with the output end through the capacitor C25, and the other pin of the voltage reduction chip U4 is directly connected with the output end of the capacitor C25 in parallel. The output end is pressurized, so that the influence of voltage fluctuation of the input end on the output end is avoided.

The first voltage conditioning module is an inductor L3 and is used for converting the voltage of the output end of the booster pump into a gentle voltage to be output, the second voltage conditioning module is an electrolytic capacitor C26, the negative electrode of the electrolytic capacitor is grounded, and the positive electrode of the electrolytic capacitor is connected with the output end of the inductor L3 and is used for conditioning the gentle voltage output by the inductor L3 into a stable voltage.

The voltage regulation module of this example further includes a discharge diode D1, the anode of which is grounded and the cathode of which is connected to the output terminal of the booster pump and the input terminal of the inductor L3 of the first voltage regulation module, respectively. When the voltage reduction chip U4 has no voltage output, a loop can be formed to timely discharge the charges on the inductor L3 and the capacitor C25.

The output filter of the embodiment is more than one grounded filter capacitor connected in parallel to filter out high-frequency voltage. The protection module in this example is a zener diode D22, and the anode of the zener diode D22 is grounded.

The working principle of the power supply module of the embodiment is as follows:

when the power input module inputs 24V high level, through the port protection module, realize input power's protection, then filter, send into the voltage regulation module, the voltage curve of the voltage of voltage regulation module output is the uneven voltage curve of height, after first voltage conditioning module energy storage filters, the voltage curve of output voltage is a relatively gentle voltage curve, then through second voltage conditioning module, condition the voltage after the output, then convert into a straight line, thereby realize that the steady output of voltage gives the back stage circuit. If the voltage is output, the light emitting diode D12 is on, and the power supply circuit is indicated to be in a normal working state.

Because the output port may have static electricity and the like, the voltage regulator tube D22 of the present example breaks down and discharges when the output port reaches 5.6V, so that the output voltage of the present example is kept below 5.6V, and damage of a large voltage to a subsequent stage circuit is avoided.

As shown in fig. 12, the clock module of this embodiment includes a crystal oscillator X1 of a clock chip U14, pins 5 to 7 of the clock chip U14 are respectively connected to a master controller, but the working power supply of the master controller is 1.8V, and the output 1.8V high level is sent to pins 5 to 7 of the clock module, where pin 5 is a reset pin, and pins 6 and 7 are clock signal pins. In order to prevent the high level output by the clock chip U14 from being possibly unrecognizable by the clock chip U14 and causing signal loss, a clock power supply unit is additionally arranged between the clock module and the main control module, so that power is supplied to the clock chip on one hand, and the level conversion function of outputting the 1.8V high level by the main control module is completed on the other hand.

Specifically, three pins of the clock chip U14 in this example support the converted 3.3V high level input, and therefore, the clock power supply unit in this example includes three level conversion units with the same structure, and the level conversion units are used to raise the high level of 1.8V to the 3.3V high level, so as to ensure the high level identification of the clock chip U14.

One path of the level conversion unit comprises resistors R68, R70, R67 and an MOS transistor Q5, wherein the source electrode of the MOS transistor is respectively connected with one end of the resistor R68 and a reset signal output pin of the main control module, the grid electrode of the MOS transistor Q5 is respectively connected with the other end of the resistor R68 and a 1.8V high-level driving pin through the resistor R70, the drain electrode of the MOS transistor Q5 is respectively connected with one end of the resistor R67 and the pin 5 of the clock chip U14, and the other end of the resistor R67 is connected with a 3.3V power supply.

In this embodiment, the conduction condition of the MOS transistor Q5 is unchanged, and after the MOS transistor Q5 is turned on, the input terminal of the pin 5 of the clock chip U14 is connected to the 3.3V power supply, so that the original 1.8V high-level signal is converted into a 3.3V high-level signal, and the 3.3V high-level signal is sent to the pin 5 of the clock chip U14. The other two pins are the same principle as the reset pin.

The utility model can effectively ensure the safety of the post-stage circuit by arranging the filtering and protecting circuit at the input and the output of the power supply; multistage conditioning circuit no matter how the voltage of preceding stage changes, through the utility model discloses a multistage processing output can export stable, straight voltage, has ensured the stable supply of back stage circuit power. Through the improvement to clock power supply unit, can avoid the phenomenon that clock chip received signal runs off.

The above-mentioned embodiments are the preferred embodiments of the present invention, and the scope of the present invention is not limited to the above-mentioned embodiments, and the scope of the present invention includes and is not limited to the above-mentioned embodiments, and all equivalent changes made according to the present invention are within the protection scope of the present invention.

Claims (10)

1. A multifunctional megaphone is characterized in that: including host system, audio frequency drive module, audio frequency amplification module and power amplifier module, still include serial ports output module, serial ports switching mouth module, communication interface module, wherein, host system is used for exporting audio signal and gives the audio frequency amplification module, audio frequency drive module is used for the drive the audio frequency amplification module, the audio frequency amplification module is used for exporting the power amplifier module after audio signal enlargies, serial ports output module's input links to each other with host system's output, serial ports output module's output links to each other with the input of serial ports switching mouth module, the output of serial ports switching mouth module links to each other with communication interface module.

2. The multifunctional megaphone of claim 1, wherein: the display device further comprises a first display module, and the display module is connected with the output end of the serial port output module.

3. Multifunctional megaphone as claimed in claim 1, wherein: the device also comprises a first display module or/and a second display module, wherein the first display module is connected with the output end of the serial port output module, and the second display module is connected with the output end of the communication interface module.

4. The multifunctional megaphone of claim 3, wherein: the first display module is a plurality of LED lamps of a nixie tube or an array, and the second display module comprises a display screen.

5. Multifunctional megaphone as claimed in any one of claims 1 to 4, wherein: the communication interface module comprises an RS-485 communication module and an output interface connected with the output end of the RS-485 communication module.

6. Multifunctional megaphone as claimed in claim 5, wherein: the communication interface module also comprises an interface switching module and an RS-232 communication module, wherein one end of the interface switching module is connected with the output end of the serial port switching interface module, the first selection end of the other end of the interface switching module is connected with the input end of the RS-485 communication module, the second selection end of the interface switching module is connected with the input end of the RS-232 communication module, and the output end of the RS-232 communication module is connected with the output interface.

7. The multifunctional megaphone of claim 6, wherein: the interface switching module adopts a switch chip or a dial switch.

8. Multifunctional megaphone as claimed in any one of claims 1 to 4, wherein: the multifunctional megaphone further comprises a voice receiving module and a GPIO interface, wherein the voice receiving module is used for receiving voice, and the GPIO interface is used for communication between the main control module and an external function expanding chip.

9. Multifunctional megaphone as claimed in any one of claims 1 to 4, wherein: the multifunctional megaphone also comprises a storage module and an alarm module, wherein the storage module and the alarm module are respectively connected with the main control module.

10. Multifunctional megaphone according to any of claims 1-4, characterized in that: the main control module is a 4G/5G communication module.

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