Interphone for switching USB interface to UART serial port communication

Abstract

The utility model discloses an interphone with USB interface switching UART serial port communication, comprising a PCB arranged in the interphone, the PCB is provided with a damping module, a USB interface, a switching circuit and a UART serial port, the USB interface, the switching circuit and the UART serial port are electrically connected in sequence, the USB interface is electrically connected with the UART serial port through the switching circuit, the switching circuit is provided with a data conversion chip, and the data conversion chip is connected with the USB interface. The damping module is connected with the USB interface, the damping module is used for reducing noise interference when the interphone transmits communication signals, and the data conversion chip is used for converting received USB data into serial data or converting the received serial data into USB data. According to the utility model, the stability and reliability of interphone communication are improved through the built-in conversion circuit.

Description

Technical Field

[0001] The utility model relates to the technical field of interphones, in particular to an interphone with a USB interface switching to a UART serial port communication. Background Art

[0002] Walkie-talkies, also known as walkie-talkies, are portable wireless mobile communication products that were first used in military communications during World War II. From the launch of the world's first commercial wireless walkie-talkie by Motorola in 1948 to the opening of the home walkie-talkie market in Europe, the United States and other countries and regions in the 1990s, walkie-talkies have been widely used in various fields such as public security, transportation, railways, airports, ports, construction, manufacturing, water conservancy, electricity, forestry, tourism, hotels, and services.

[0003] Traditional walkie-talkies usually only support serial communication and cannot directly transmit data with computers or other USB devices. In order to achieve communication with computers or other USB devices, additional converters or adapters are required, which will affect the stability and reliability of communication. Utility Model Content

[0004] The main purpose of the utility model is to provide an intercom with USB interface transferred to UART serial port communication, aiming at improving the stability and reliability of intercom communication.

[0005] To achieve the above-mentioned purpose, the utility model proposes a walkie-talkie for USB interface to UART serial port communication, comprising a PCB board placed inside the walkie-talkie, the PCB board being provided with a damping module, a USB interface, a conversion circuit, and a UART serial port electrically connected in sequence, the USB interface being electrically connected to the UART serial port through the conversion circuit, the conversion circuit being provided with a data conversion chip, the damping module being connected to the USB interface, the damping module being used to reduce noise interference when the walkie-talkie transmits communication signals, and the data conversion chip being used to convert received USB data into serial data or to convert received serial data into USB data.

[0006] In one embodiment, the PCB board further includes a first interface, the first interface is provided with a protection circuit, and the protection circuit is used to provide a stable input voltage for the intercom.

[0007] In one embodiment, the protection circuit includes a first diode, a second diode, a first test point, and a first magnetic bead. The first diode and the second diode are connected in reverse series, the cathode of the second diode is grounded, the cathode of the first diode is connected to the first magnetic bead, and the first magnetic bead is connected to the first test point.

[0008] In one embodiment, the first diode and the second diode are zener diodes.

[0009] In one embodiment, the intercom further includes an audio amplifier, the audio amplifier is connected to the protection circuit, and the audio amplifier receives the audio signal stabilized by the protection circuit.

[0010] In one embodiment, the audio amplifier includes a power amplifier chip, and the power amplifier chip is connected to the protection circuit.

[0011] In one embodiment, the audio amplifier further includes a first switch tube, a second switch tube, a first resistor, and a second resistor. The collector of the first switch tube is electrically connected to the power amplifier chip, the base of the first switch tube is connected to the first resistor and the second resistor, and the second resistor is connected to the collector of the second switch tube.

[0012] In one embodiment, the intercom further includes an MCU chip, and the MCU chip is connected to the conversion circuit and the audio amplifier.

[0013] The utility model adopts a conversion circuit to connect the USB interface and the UART serial port, converts the received USB data into serial data or converts the received serial data into USB data, and can directly transmit data with a computer or other USB devices. The stability and reliability of the intercom communication are improved through the built-in conversion circuit, wherein the damping module can reduce the noise interference when the intercom transmits the communication signal. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0015] Figure 1 This is the schematic diagram of the intercom module;

[0016] Figure 2 is a first interface circuit diagram;

[0017] Figure 3 This is the circuit diagram of the audio amplifier;

[0018] Figure 4 The conversion circuit diagram is shown in Figure 2.

[0019] Description of Figure Numbers:

[0020] J1-USB interface, J2-first interface, 2-shock absorption module, 3-conversion circuit, U301-data conversion chip, 4-UART serial port, 5-MCU chip, 6-protection circuit, 7-audio amplifier.

[0021] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0024] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if the meaning of "and / or" appearing in the full text is to include three parallel schemes, taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0025] The utility model proposes an intercom for USB interface to UART serial port communication, comprising a PCB board placed inside the intercom, wherein a damping module 2, a USB interface J1, a conversion circuit 3, and a UART serial port 4 which are electrically connected in sequence are arranged on the PCB board, wherein the USB interface J1 is electrically connected to the UART serial port 4 via the conversion circuit 3, the conversion circuit 3 is provided with a data conversion chip U301, the damping module 2 is connected to the USB interface J1, the damping module 2 is used to reduce noise interference when the intercom transmits communication signals, and the data conversion chip U301 is used to convert received USB data into serial data or to convert received serial data into USB data.

[0026] like Figure 1 and Figure 4 As shown, in this embodiment, the model of the data conversion chip U301 is CH304E. The utility model uses a conversion circuit 3 to connect the USB interface J1 and the UART serial port 4, converts the received USB data into serial data or converts the received serial data into USB data, and can directly transmit data with a computer or other USB devices. The built-in conversion circuit 3 improves the stability and reliability of the intercom communication, wherein the shock absorption module 2 can reduce the noise interference when the intercom transmits the communication signal. Through the conversion circuit 3, the USB interface J1 can receive data from a computer or other USB device, and convert the USB data into a serial data format, and then send it out through the UART serial port 4. Similarly, the serial data received by the UART serial port 4 can also be converted into a USB data format and sent to a computer or other device through the USB interface J1.

[0027] In the embodiment of the present utility model, the USB interface J1 may be a TYPE-C interface, such as Figure 1 As shown, the intercom can realize the conversion of TYPE-C interface to UART serial port 4 inside, and the TYPE-C interface and UART serial port 4, as well as the corresponding conversion circuit 3, are integrated on the PCB board. Through the conversion circuit 3, the TYPE-C interface can receive data from a computer or other USB device, convert it into a serial data format, and then send it out through the serial port. Similarly, the serial data received by the serial port can also be converted into a USB data format and sent to a computer or other device through the TYPE-C interface, avoiding the cumbersome and unstable factors of the external connection line, improving the reliability and stability of communication, and the intercom has a simple structure, is easy to produce and maintain, and has a relatively low cost; the intercom can directly transmit data with a computer or other USB device through the TYPE-C interface without the need for additional configuration of a converter or adapter. This provides users with a convenient user experience.

[0028] like Figure 2 As shown, the PCB board also includes a first interface J2, and the first interface J2 is provided with a protection circuit 6, and the protection circuit 6 is used to provide a stable input voltage for the intercom.

[0029] In this embodiment, the first interface J2 is provided with a plurality of protection circuits 6, and the protection circuit 6 includes a first diode, a second diode, a first test point TP34, and a first magnetic bead FB6. The first diode and the second diode are connected in reverse series, the cathode of the second diode is grounded, the cathode of the first diode is connected to the first magnetic bead FB6, and the first magnetic bead FB6 is connected to the first test point TP34.

[0030] The first diode and the second diode are voltage stabilizing diodes. The first diode and the second diode are connected in reverse series and can be used for voltage stabilization in a circuit. When a forward voltage is applied to the first diode, it works like a normal diode; but when a reverse voltage is applied to the first diode, it enters a reverse breakdown region and keeps the voltage approximately constant.

[0031] The reverse series Zener diode can be used to prevent the voltage in the circuit from exceeding a certain value, thereby protecting other components in the circuit from damage. When the voltage in the circuit exceeds the reverse breakdown voltage of the Zener diode, the Zener diode will start to conduct, maintaining the excess voltage at a safe level, thus playing a role in voltage stabilization.

[0032] like Figure 3 As shown, the intercom also includes an audio amplifier 7, which is connected to the protection circuit 6, and the audio amplifier 7 receives the audio signal after the protection circuit 6 is stabilized. The audio amplifier 7 includes a power amplifier chip U4, which is connected to the protection circuit 6. This embodiment uses a power amplifier chip U4 with a model of LN4849, and the power amplifier chip U4 amplifies the power of the input signal to a higher level to drive the output load (such as a speaker, a motor, etc.). It is usually used in the fields of audio amplification, wireless communication, etc. The power amplifier chip U4 can amplify the current or voltage of the input signal to a level sufficient to drive the target load, thereby achieving signal amplification and power output. This makes it play a key role in various electronic devices.

[0033] The audio amplifier 7 also includes a first switch tube Q10, a second switch tube Q22, a first resistor 153, and a second resistor 174. The collector of the first switch tube Q10 is electrically connected to the power amplifier chip U4, the base of the first switch tube Q10 is connected to the first resistor 153 and the second resistor 174, and the second resistor 174 is connected to the collector of the second switch tube Q22. The first resistor 153 and the second resistor 174 are voltage divider resistors. The first resistor 153 and the second resistor 174 divide the input voltage into different proportions and output them to different circuit branches. By reasonably selecting the value of the voltage divider resistor, the output voltage can be controlled, thereby realizing the voltage divider function. The voltage divider resistor can be used to reduce the voltage, adjust the level, or provide the voltage signal required by other circuit modules. The first switch tube Q10 and the second switch tube Q22 are triodes, which can amplify current, voltage and power signals, and are used to amplify weak signals or control high-power loads; the gain, frequency response and other characteristics of the circuit can be adjusted to achieve the regulation and control of the circuit performance.

[0034] The intercom further comprises an MCU chip 5 , which is connected to the conversion circuit 3 and the audio amplifier 7 , and is responsible for controlling and managing the entire intercom.

[0035] The above description is only an optional embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A walkie-talkie with USB interface to UART serial communication, characterized in that: It includes a PCB board placed inside the intercom, the PCB board is provided with a shock absorbing module, a USB interface, a conversion circuit, and a UART serial port which are electrically connected in sequence, the USB interface is electrically connected to the UART serial port through the conversion circuit, the conversion circuit is provided with a data conversion chip, the shock absorbing module is connected to the USB interface, the shock absorbing module is used to reduce noise interference when the intercom transmits communication signals, and the data conversion chip is used to convert received USB data into serial data or to convert received serial data into USB data.

2. The intercom according to claim 1, characterized in that: The PCB board also includes a first interface, and the first interface is provided with a protection circuit, and the protection circuit is used to provide a stable input voltage for the intercom.

3. The intercom according to claim 2, characterized in that: The protection circuit includes a first diode, a second diode, a first test point, and a first magnetic bead. The first diode and the second diode are connected in reverse series, the cathode of the second diode is grounded, the cathode of the first diode is connected to the first magnetic bead, and the first magnetic bead is connected to the first test point.

4. The intercom according to claim 3, characterized in that: The first diode and the second diode are voltage stabilizing diodes.

5. The intercom according to claim 2, characterized in that: The intercom further includes an audio amplifier, which is connected to the protection circuit and receives the audio signal stabilized by the protection circuit.

6. The intercom according to claim 5, characterized in that: The audio amplifier comprises a power amplifier chip, and the power amplifier chip is connected to the protection circuit.

7. The intercom according to claim 6, characterized in that: The audio amplifier also includes a first switch tube, a second switch tube, a first resistor, and a second resistor. The collector of the first switch tube is electrically connected to the power amplifier chip, the base of the first switch tube is connected to the first resistor and the second resistor, and the second resistor is connected to the collector of the second switch tube.

8. The intercom according to claim 5, characterized in that: The intercom further comprises an MCU chip, and the MCU chip is connected to the conversion circuit and the audio amplifier.

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