CN212381371U

CN212381371U - Touch IP network paging microphone

Info

Publication number: CN212381371U
Application number: CN202020322541.7U
Authority: CN
Inventors: 毛铎; 吴双文
Original assignee: Guangzhou Zhuosheng Electronic Technology Co ltd
Current assignee: Guangzhou Zhuosheng Electronic Technology Co ltd
Priority date: 2020-03-14
Filing date: 2020-03-14
Publication date: 2021-01-19
Anticipated expiration: 2030-03-14

Abstract

The utility model discloses a touch IP network paging microphone, which comprises an audio acquisition module, a PCM encoder, a wireless communication module, a receiving terminal, a touch screen and a power supply module, wherein the audio acquisition module is connected with the PCM encoder, the PCM encoder is connected with the receiving terminal through the wireless communication module, and the power supply module is connected with the PCM encoder; the power supply module comprises a voltage input end, a first resistor, a second resistor, a first triode, a sixth resistor, a first operational amplifier, a three-end adjustable reference source, a sixth resistor, a third resistor, a fourth potentiometer, a fifth resistor, a first diode, a second triode, a buzzer, a first capacitor and a voltage output end, wherein one end of the voltage input end is connected with one end of the first resistor and one end of the second resistor respectively, and the other end of the first resistor is connected with an emitting electrode of the first triode. The utility model discloses circuit structure is comparatively simple, the cost is lower, the security and the reliability of convenient maintenance, circuit are higher.

Description

Touch IP network paging microphone

Technical Field

The utility model relates to a microphone field, in particular to touch IP network paging microphone.

Background

The IP network paging microphone is generally installed in a main control room or a leader office and can perform unidirectional broadcasting, monitoring and bidirectional talkback. Adopt professional control cabinet design, sturdy and durable. The shout broadcast can be carried out to the whole area, the subarea and the individual terminal. Fig. 1 is a schematic circuit diagram of a power supply portion of a conventional IP network paging microphone, and it can be seen from fig. 1 that the power supply portion of the conventional IP network paging microphone uses many components, has a complex circuit structure, has a high hardware cost, and is inconvenient to maintain. In addition, since the power supply part of the conventional IP network paging microphone lacks a corresponding circuit protection function, for example: the safety and reliability of the circuit are poor due to the lack of the current-limiting protection function.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model lies in, to the above-mentioned defect of prior art, a circuit structure is comparatively simple, the cost is lower, the security and the higher touch IP network paging microphone of reliability of convenient maintenance, circuit is provided.

The utility model provides a technical scheme that its technical problem adopted is: the touch IP network paging microphone comprises an audio acquisition module, a PCM encoder, a wireless communication module, a receiving terminal, a touch screen and a power supply module, wherein the audio acquisition module is connected with the PCM encoder;

the power supply module comprises a voltage input end, a first resistor, a second resistor, a first triode, a sixth resistor, a first operational amplifier, a three-end adjustable reference source, a sixth resistor, a third resistor, a fourth potentiometer, a fifth resistor, a first diode, a second triode, a buzzer, a first capacitor and a voltage output end, wherein one end of the voltage input end is respectively connected with one end of the first resistor and one end of the second resistor, the other end of the first resistor is connected with an emitting electrode of the first triode, a base electrode of the first triode is connected with an output end of the first operational amplifier, a collector electrode of the first triode is respectively connected with one end of the third resistor, one end of the fifth resistor and an anode of the first diode through the sixth resistor, and the other end of the fifth resistor is connected with a base electrode of the second triode, the non inverting input end of first operational amplifier respectively with the other end of third resistance, a stiff end and the slip end of fourth potentiometre are connected, the inverting input end of first operational amplifier is connected with the other end of second resistance respectively, the collecting electrode of second triode with the one end of bee calling organ is connected, the projecting pole of second triode respectively with the negative pole of first diode, the one end of first electric capacity and the one end of voltage output end are connected, the other end of voltage input end respectively with another stiff end of three-terminal adjustable reference source, another stiff end of fourth potentiometre, the other end of bee calling organ, the other end of first electric capacity and the other end of voltage output end are connected.

In the touch IP network paging microphone of the present invention, the resistance of the sixth resistor is 32k Ω.

In the touch IP network paging microphone of the present invention, the power supply module further includes a second diode, an anode of the second diode is connected to a cathode of the first diode, and a cathode of the second diode is connected to an emitter of the second triode.

In the touch IP network paging microphone of the present invention, the model of the second diode is L-1822.

In the touch IP network paging microphone of the present invention, the first triode is a PNP type triode.

In the touch IP network paging microphone of the present invention, the second triode is an NPN-type triode.

Touch IP network paging microphone in, wireless communication module is in 5G communication module, 4G communication module, bluetooth module, wiFi module, GSM module, CDMA2000 module, WCDMA module, TD-SCDMA module, Zigbee module and loRa module arbitrary one or arbitrary several kinds of combinations.

Implement the utility model discloses a touch IP network paging microphone has following beneficial effect: the power supply module is compared with the power supply part of the traditional IP network paging microphone, the used components are fewer, and due to the fact that some components are saved, the hardware cost can be reduced, in addition, the sixth resistor is used for current limiting protection, the circuit structure is simple, the cost is low, the maintenance is convenient, and the safety and the reliability of the circuit are high.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic circuit diagram of the power supply portion of a conventional IP network paging handset;

fig. 2 is a schematic structural diagram of an embodiment of the touch IP network paging microphone of the present invention;

fig. 3 is a schematic circuit diagram of the power supply module in the embodiment.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the embodiment of the present invention, the schematic structural diagram of the touch IP network paging microphone is shown in fig. 2. In fig. 2, the touch IP network paging microphone includes an audio acquisition module 1, a PCM encoder 2, a wireless communication module 3, a receiving terminal 4, a touch screen 5 and a power supply module 6, wherein the audio acquisition module 1 is connected to the PCM encoder 2, the PCM encoder 2 is connected to the receiving terminal 4 through the wireless communication module 3, the touch screen 5 is connected to the PCM encoder 2, and the power supply module 6 is connected to the PCM encoder 2.

Audio signal is gathered in real time to audio acquisition module 1 to send the audio signal of gathering to PCM encoder 2 and encode into the data package, PCM encoder 2 transmits the data package after the code to appointing to receiving terminal 4 of specific certain point or certain district through wireless communication module 3, and receiving terminal 4 decodes the data package of code back, reports. The wireless transmission is free from distance limitation. In addition, the touch screen 5 can be used for inputting data or displaying data, and touch operation can simplify function implementation.

In this embodiment, the wireless communication module 3 is any one or a combination of any several of a 5G communication module, a 4G communication module, a bluetooth module, a WiFi module, a GSM module, a CDMA2000 module, a WCDMA module, a TD-SCDMA module, a Zigbee module, and a LoRa module. Through setting up multiple wireless communication mode, not only can increase the flexibility of wireless communication mode, can also satisfy the demand of different users and different occasions. Especially, when adopting the loRa module, its communication distance is far away, and communication performance is comparatively stable, is applicable to the occasion that requires the communication quality to be higher. The adoption of the 5G communication mode can achieve high data rate, reduce delay, save energy, reduce cost, improve system capacity and realize large-scale equipment connection.

In this embodiment, the audio acquisition module 1, the PCM encoder 2, the receiving terminal 4, and the touch screen 5 are all implemented by using a structure in the prior art, and the working principle thereof is also the working principle in the prior art, which is not described here.

Fig. 3 is a schematic circuit diagram of the power supply module in this embodiment, in fig. 3, the power supply module 7 includes a voltage input terminal Vin, a first resistor R1, a second resistor R2, a first transistor Q1, a sixth resistor R6, a first operational amplifier a1, a three-terminal adjustable reference source P, a sixth resistor R6, a third resistor R3, a fourth potentiometer RP4, a fifth resistor R5, a first diode D1, a second transistor Q2, a buzzer B, a first capacitor C1 and a voltage output terminal Vo, wherein one terminal of the voltage input terminal Vin is connected to one terminal of the first resistor R1 and one terminal of the second resistor R2 respectively, the other terminal of the first resistor R5 is connected to an emitter of the first transistor Q1, a base of the first transistor Q1 is connected to an output terminal of the first operational amplifier a1, a collector of the first transistor Q1 is connected to one terminal of the first resistor R6324, an anode of the first diode R3, a first terminal of the fifth resistor R5928 and a terminal of the resistor D1, the other end of the fifth resistor R5 is connected with the base of the second triode Q2, the non-inverting input end of the first operational amplifier A1 is respectively connected with the other end of the third resistor R3, one fixed end and the sliding end of the fourth potentiometer RP4, the inverting input end of the first operational amplifier A1 is respectively connected with the other end of the second resistor R2, the collector of the second triode Q2 is connected with one end of the buzzer B, the emitter of the second triode Q1 is respectively connected with the cathode of the first diode D1, one end of the first capacitor C1 and one end of the voltage output end Vo, and the other end of the voltage input end Vin is respectively connected with the other fixed end of the three-end adjustable reference source P, the other fixed end of the fourth potentiometer RP4, the other end of the buzzer B, the other end of the first capacitor C1 and the other end of the voltage output end Vo.

Compared with the power supply part of the traditional IP network paging microphone in the figure 1, the power supply module 7 has the advantages of fewer used components, simpler circuit structure and convenient maintenance, and can reduce the hardware cost due to the saving of some components. In addition, the sixth resistor R6 is a current limiting resistor, and is used for current limiting protection of the collector current of the first transistor Q1. The current limiting protection principle is as follows: when the collector current of the first triode Q1 is large, the sixth resistor R6 can reduce the collector current of the first triode Q1 to keep the first triode Q1 in a normal working state, so that the device in the circuit is not burnt out due to too large current, and the safety and reliability of the circuit are high. It should be noted that in the present embodiment, the resistance of the sixth resistor R6 is 32k Ω, and certainly, in practical applications, the resistance of the sixth resistor R6 may be increased or decreased according to specific situations.

The working principle of the power supply module 7 is as follows: in the circuit, a first resistor R1 and a three-terminal adjustable reference source P form a reference voltage module, in an initial state, the voltage of the non-inverting input terminal of a first operational amplifier A1 is lower than the voltage of the inverting input terminal thereof, so that the non-inverting input terminal thereof outputs a low level, a second triode Q2 is turned on, when a second triode Q2 is turned on, a current is forced to flow through a sixth resistor R6, the voltage applied to the two terminals of a voltage output terminal Vo is increased, further the voltage of the non-inverting input terminal of the first operational amplifier A1 is increased, when the non-inverting input terminal of a first operational amplifier A1 is higher than the voltage of the inverting input terminal, the output of the first operational amplifier A1 is changed into a high level, a first triode Q1 is turned off, the output voltage is continuously decreased, when the inverting input terminal of the first operational amplifier A1 is lower than the voltage of the non-inverting input terminal, the first operational amplifier A1 outputs, the output voltage rises again to achieve the purpose of voltage stabilization, the value of the fourth potentiometer RP4 is adjusted, namely the voltage stabilization value can be changed, and the purpose of voltage adjustment is achieved, a first diode D1, a first capacitor C1, a second triode Q2 and a buzzer B in the circuit form an undervoltage protection module, when a voltage input end Vin is normal, the second triode Q2 is powered on through a fifth resistor R5, the second triode Q2 is cut off, the buzzer B does not work, when the voltage input end Vin is powered off, the base voltage of the second triode Q2 disappears, the first capacitor C1 discharges through an emitter of the second triode Q2, therefore, the second triode Q2 is conducted, and the buzzer B gives out alarm sound.

In this embodiment, the first transistor Q1 is a PNP transistor, and the second transistor Q2 is an NPN transistor. Certainly, in practical applications, the first transistor Q1 may also be an NPN transistor, and the second transistor Q2 may also be a PNP transistor, but the structure of the circuit is also changed accordingly.

In this embodiment, the power supply module 7 further includes a second diode D2, an anode of the second diode D2 is connected to a cathode of the first diode D1, and a cathode of the second diode D2 is connected to an emitter of the second transistor Q2. The second diode D2 is a current limiting diode for current limiting protection of the emitter current of the second transistor Q2. The current limiting protection principle is as follows: when the emitter current of the second triode Q2 is large, the second diode D2 can reduce the emitter current of the second triode Q2 to keep the second triode Q2 in a normal working state, so that the elements in the circuit are not burnt out due to too large current, and the safety and reliability of the circuit are further enhanced. It should be noted that in the present embodiment, the second diode D2 has a model number L-1822. Of course, in practical applications, the second diode D2 may also be another type of diode with the same function.

In short, in this embodiment, compared with the power supply part of the conventional IP network paging microphone, the power supply module 7 uses fewer components, has a simpler circuit structure, is convenient to maintain, and can reduce hardware cost due to the fact that some components are saved. In addition, since the power supply module 7 is provided with a current limiting resistor, the safety and reliability of the circuit are high.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A touch IP network paging microphone is characterized by comprising an audio acquisition module, a PCM encoder, a wireless communication module, a receiving terminal, a touch screen and a power supply module, wherein the audio acquisition module is connected with the PCM encoder;

the power supply module comprises a voltage input end, a first resistor, a second resistor, a first triode, a sixth resistor, a first operational amplifier, a three-end adjustable reference source, a third resistor, a fourth potentiometer, a fifth resistor, a first diode, a second triode, a buzzer, a first capacitor and a voltage output end, wherein one end of the voltage input end is connected with one end of the first resistor and one end of the second resistor respectively, the other end of the first resistor is connected with an emitting electrode of the first triode, a base electrode of the first triode is connected with the output end of the first operational amplifier, a collector electrode of the first triode is connected with one end of the third resistor, one end of the fifth resistor and an anode of the first diode respectively through the sixth resistor, the other end of the fifth resistor is connected with a base electrode of the second triode, and a non-inverting input end of the first operational amplifier is connected with the other end of the third resistor respectively, A fixed end and a sliding end of a fourth potentiometer are connected, an inverting input end of the first operational amplifier is respectively connected with the other end of the second resistor, a collector electrode of the second triode is connected with one end of the buzzer, an emitter electrode of the second triode is respectively connected with a cathode of the first diode, one end of the first capacitor and one end of the voltage output end, and the other end of the voltage input end is respectively connected with the other fixed end of the three-end adjustable reference source, the other fixed end of the fourth potentiometer, the other end of the buzzer, the other end of the first capacitor and the other end of the voltage output end;

the power supply module further comprises a second diode, the anode of the second diode is connected with the cathode of the first diode, and the cathode of the second diode is connected with the emitter of the second triode; the second diode is a current limiting diode and is used for carrying out current limiting protection on emitter current of the second triode.

2. The touch IP network paging microphone of claim 1, wherein the sixth resistor has a resistance of 32k Ω.

3. The touch IP network paging microphone of claim 2, wherein the second diode is model L-1822.

4. The touch IP network paging microphone of any one of claims 1 to 3, wherein the first transistor is a PNP transistor.

5. The touch IP network pager microphone of any of claims 1-3, wherein the second transistor is an NPN transistor.

6. The touch IP network paging microphone of any one of claims 1 to 3, wherein the wireless communication module is any one or a combination of any more of a 5G communication module, a 4G communication module, a bluetooth module, a WiFi module, a GSM module, a CDMA2000 module, a WCDMA module, a TD-SCDMA module, a Zigbee module, and a LoRa module.