Mini portable interphone

Abstract

The utility model relates to an interphone, in particular to a mini portable interphone, which comprises a microprogrammed control unit (MCU), a wireless module, a key input module, an interface module and a light-emitting diode (LED) indication module, the wireless module, the key input module, the interface module and the LED indication module are connected with the MCU, and a microphone (MIC) voice processing module, an audio encoding and decoding module and an audio power amplifier are integrated in the MCU. According to the utility model, by fusing the 433MHz wireless module and the MCU main control unit, sound analog signals received and processed by the MIC voice processing module are converted into digital signals, and then voice data are packaged and sent out through the 433MHz wireless module, so that long-distance wireless voice transmission is realized, and excellent anti-interference capability is achieved.

Description

Technical Field

[0001] This utility model relates to a walkie-talkie, specifically, to a mini portable walkie-talkie. Background Technology

[0002] A walkie-talkie, also known as a two-way radio, is a portable device that enables two-way communication. It utilizes the propagation of radio signals through the air to achieve point-to-point or point-to-multipoint communication. Walkie-talkies do not require any network support and can make calls without incurring charges, making them suitable for relatively fixed and frequent communication situations.

[0003] Existing wireless walkie-talkie structures, such as the portable walkie-talkie described in CN221380917U, include a body with a slot on its inner side. A cover plate is fixedly connected to the upper end of the slot. A servo motor is fixedly connected to the bottom of the slot, and a screw is fixedly connected to the output end of the servo motor. Limiting rods are vertically fixed to both sides of the slot. A connecting block is provided inside the slot, and an antenna is fixedly connected to one side of the connecting block. In this invention, the servo motor drives the screw to rotate, which in turn moves the connecting block along the limiting rod, thereby moving the antenna. When not in use, the antenna can be stored inside the slot for easy carrying. A sealing block is provided at the upper end of the antenna. After the antenna is stored, the sealing block engages with the opening to seal it. The problem is that existing walkie-talkies have poor signal penetration and anti-interference performance during long-distance wireless voice transmission, resulting in unstable communication.

[0004] To improve signal penetration and ensure stable communication, a mini portable walkie-talkie is proposed. Utility Model Content

[0005] The purpose of this invention is to provide a mini portable walkie-talkie to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides a mini portable walkie-talkie, including an MCU main control unit and a wireless module, a key input module, an interface module, and an LED indicator module connected to the MCU main control unit. The MCU main control unit integrates a MIC voice processing module, an audio codec module, and an audio power amplifier.

[0007] The MCU main control unit converts the analog sound signal received and processed by the MIC voice processing module into a digital signal, packages the voice data, and sends the voice data out through the wireless module.

[0008] As a further improvement to this technical solution, the wireless module includes a chip CN1.

[0009] Pin 1 of the chip CN1 is connected to resistor R1 and then to the SX_RES terminal. Resistor R1 is connected to the V3.3V terminal.

[0010] Pin 2 of the chip CN1 is connected to the SX_INT terminal, pin 3 is connected to the SX_BUSY terminal, pin 4 is connected to the SX_NSS terminal, pin 5 is connected to the SX_MOSI terminal, pin 6 is connected to the SX_MISO terminal, pin 7 is connected to the SX_SCK terminal, pin 8 is connected to the V3.3V terminal, pin 10 is connected to the VDD33_55 terminal, pin 12 is connected to the VB terminal, pin 13 is connected to the VA terminal, and pin 15 is connected to the Output terminal.

[0011] Pins 9, 11, 14, and 16 of the chip CN1 are all grounded.

[0012] As a further improvement to this technical solution, the MCU main control unit is an MS51TC0AE chip.

[0013] As a further improvement to this technical solution, the key input module includes keys SW1, K2, K4, and K5, wherein:

[0014] Pin 1 of button SW1 is connected to the REST_MCU terminal, and pins 2 and 3 are both connected to pin 3 of button K2, pin 3 of button K4, and pin 3 of button K5 and grounded.

[0015] Pin 1 of button K2 is connected to the KEY_ON / OFF terminal;

[0016] Pin 1 of button K4 is connected to the VOL+ terminal;

[0017] Pin 1 of button K5 is connected to the VOL- terminal.

[0018] As a further improvement to this technical solution, the LED indicator module includes light-emitting diodes D2, D5, and D6, wherein:

[0019] The positive terminal of LED D2 is connected to resistor R13, and resistor R13 is connected to the LEDRed terminal. The negative terminal of LED D2 is connected to the negative terminals of LED D5 and LED D6 and grounded.

[0020] The positive terminal of the light-emitting diode D5 is connected to the resistor R7, and the resistor R7 is connected to the BAT_Red terminal;

[0021] The positive terminal of the LED D6 is connected to the resistor R9, and the resistor R9 is connected to the BAT_Green terminal.

[0022] As a further improvement to this technical solution, the interface module includes chip J1.

[0023] Pins 1, 2, 3, 4, A1, A10, A12, B1, B10, and B12 of chip J1 are all grounded;

[0024] The chip J1 has pin A2 connected to the DACL terminal, pin A3 connected to the TP_BAT terminal, pin A4 connected to the VUSB terminal, pin A5 connected to the 3V3 terminal, pin A8 connected to the KEY_SPK terminal, pin A9 connected to the VUSB terminal, and pin A11 connected to the MIC terminal.

[0025] The chip J1 has pin B2 connected to the DACL terminal, pin B3 connected to the TP_BAT terminal, pin B4 connected to the VUSB terminal, pin B5 connected to the 3V3 terminal, pin B8 connected to the KEY_SPK terminal, pin B9 connected to the VUSB terminal, and pin B11 connected to the MIC terminal.

[0026] Pins A6 and B6 of chip J1 are both connected to diode D3, and pins A7 and B7 of chip J1 are both connected to diode D4. Diode D3 is connected to the other end of diode D4 and grounded.

[0027] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0028] In this mini portable walkie-talkie, by integrating a 433MHz wireless module, the MCU main control unit converts the analog sound signal received and processed by the MIC voice processing module into a digital signal, packages the voice data, and sends the voice data out through the 433MHz wireless module, thus realizing long-distance wireless voice transmission and possessing excellent anti-interference capabilities. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0030] Figure 2 This is a circuit diagram of the wireless module of this utility model;

[0031] Figure 3 This is a circuit diagram of the key input module of this utility model;

[0032] Figure 4 This is a circuit diagram of the LED indicator module of this utility model;

[0033] Figure 5 This is the circuit diagram of the interface module of this utility model. Detailed Implementation

[0034] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0035] Walkie-talkies, as one of the earliest wireless mobile communication devices adopted by mankind, began to become widespread in the 1930s. After nearly a century of development, the application range of walkie-talkies has become extremely wide, penetrating not only from professional fields to the general consumer market, but also from military uses to civilian applications. As a terminal device capable of one-to-many communication, walkie-talkies require stable and reliable wireless communication methods to realize information transmission and monitoring functions.

[0036] Therefore, please refer to Figures 1-5 As shown, this embodiment provides a mini portable walkie-talkie, including an MCU main control unit and a wireless module, a key input module, an interface module, and an LED indicator module connected to the MCU main control unit. The MCU main control unit integrates a MIC voice processing module, an audio codec module, and an audio power amplifier.

[0037] The MCU main control unit converts the analog sound signal received and processed by the MIC voice processing module into a digital signal, packages the voice data, and then sends the voice data out through the wireless module.

[0038] The wireless module includes chip CN1.

[0039] Pin 1 of chip CN1 is connected to resistor R1 and then to the SX_RES terminal. Resistor R1 is connected to the V3.3V terminal.

[0040] Pin 2 of chip CN1 is connected to SX_INT, pin 3 to SX_BUSY, pin 4 to SX_NSS, pin 5 to SX_MOSI, pin 6 to SX_MISO, pin 7 to SX_SCK, pin 8 to V3.3V, pin 10 to VDD33_55, pin 12 to VB, pin 13 to VA, and pin 15 to Output.

[0041] Pins 9, 11, 14, and 16 of chip CN1 are all grounded.

[0042] The CN1 chip is a 433MHz wireless chip that supports both transmit and receive modes and is managed by a microcontroller (MCU) main control unit.

[0043] In transmit mode, the MCU main control unit transmits voice data to the wireless module via the SPI bus, and then the wireless module transmits the data to other walkie-talkies via radio frequency technology. In receive mode, the 433MHz wireless module receives voice data from other walkie-talkies and forwards it to the MCU main control unit for further processing.

[0044] The MCU main control unit is the MS51TC0AE chip.

[0045] In this invention, the MS51TC0AE chip is used as the core for data and information processing, and as the MCU main control unit, it is mainly responsible for data transmission.

[0046] During walkie-talkie communication, the MCU main control unit compresses the received voice data before sending it to the wireless module. Correspondingly, when the wireless module receives the data, the MCU main control unit performs decompression, and then plays the decompressed audio data through an audio power amplifier.

[0047] The key input module includes keys SW1, K2, K4, and K5, wherein:

[0048] Pin 1 of button SW1 is connected to the REST_MCU terminal, and pins 2 and 3 are both connected to pin 3 of button K2, pin 3 of button K4, and pin 3 of button K5 and grounded.

[0049] Pin 1 of button K2 is connected to the KEY_ON / OFF terminal;

[0050] Pin 1 of button K4 is connected to the VOL+ terminal;

[0051] Pin 1 of button K5 is connected to the VOL- terminal.

[0052] The key control section works by setting one input / output (I / O) port of the microcontroller (MCU) to a low level when a specific key is pressed, and then the microcontroller will perform the corresponding processing.

[0053] The LED indicator module includes light-emitting diodes D2, D5, and D6, where:

[0054] The positive terminal of LED D2 is connected to resistor R13, and resistor R13 is connected to the LEDRed terminal. The negative terminal of LED D2 is connected to the negative terminals of LED D5 and LED D6 and then grounded.

[0055] The positive terminal of LED D5 is connected to resistor R7, and resistor R7 is connected to the BAT_Red terminal.

[0056] The positive terminal of LED D6 is connected to resistor R9, and resistor R9 is connected to the BAT_Green terminal.

[0057] The LED lights are managed by the microcontroller (MCU) main control unit to indicate the working status of the device or to provide a prompt when the battery is charging or low on power. When LED D6 is constantly lit, it indicates that the battery is fully charged, and when LED D5 is constantly lit, it indicates that the battery is low on power.

[0058] The interface module includes chip J1.

[0059] Pins 1, 2, 3, 4, A1, A10, A12, B1, B10, and B12 of chip J1 are all grounded;

[0060] Connect pin A2 of chip J1 to the DACL terminal, pin A3 to the TP_BAT terminal, pin A4 to the VUSB terminal, pin A5 to the 3V3 terminal, pin A8 to the KEY_SPK terminal, pin A9 to the VUSB terminal, and pin A11 to the MIC terminal.

[0061] Pin B2 of chip J1 is connected to the DACL terminal, pin B3 is connected to the TP_BAT terminal, pin B4 is connected to the VUSB terminal, pin B5 is connected to the 3V3 terminal, pin B8 is connected to the KEY_SPK terminal, pin B9 is connected to the VUSB terminal, and pin B11 is connected to the MIC terminal.

[0062] Pins A6 and B6 of chip J1 are both connected to diode D3, and pins A7 and B7 of chip J1 are both connected to diode D4. Diode D3 is connected to the other end of diode D4 and grounded.

[0063] The TYPE-C interface module supports the connection of headphones and microphones; when the battery is low, it can be charged by connecting a data cable.

[0064] In this invention, a 433MHz wireless module is used, which is responsible for realizing long-distance wireless voice transmission. By using the 433MHz frequency band, the guide can maintain stable communication over a long distance. At the same time, the signal of this frequency band has good penetration and anti-interference ability.

[0065] Walkie-talkies connect wirelessly via a communication module. Simply setting them to the same communication channel is sufficient for communication. The walkie-talkie's microphone (MIC) voice processing module receives and processes the incoming audio signals. It converts analog audio signals into digital signals, processes them, and then outputs these digital signals to the MCU main control unit. The MCU main control unit then packages the voice data and transmits it to the 433M wireless module via an I2S interface. The 433M wireless module receives this voice data and transmits it, thus completing the voice transmission process.

[0066] When a walkie-talkie on the same channel detects a transmission on that channel, it automatically activates the MCU main control unit of that walkie-talkie. The walkie-talkie then transmits the received voice data to the MCU main control unit via the I2S interface, which is responsible for converting the digital signal into an analog signal. The converted analog signal is then sent to the audio power amplifier and finally played back through the speaker, completing the entire voice reception process.

[0067] Secondly, to enhance anti-interference capabilities, this invention integrates the advanced LoRa algorithm into the 433M wireless module. This algorithm can effectively identify and filter out interference signals in the environment, ensuring clear transmission of voice signals.

[0068] In summary, the mini portable walkie-talkie of the present invention has significant advantages in terms of size, anti-interference ability, and battery life, and can provide users with a more convenient, efficient and comfortable voice communication experience.

[0069] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A mini portable walkie-talkie, characterized in that: It includes an MCU main control unit and a wireless module, a key input module, an interface module, and an LED indicator module connected to the MCU main control unit. The MCU main control unit integrates a MIC voice processing module, an audio codec module, and an audio power amplifier. The MCU main control unit converts the analog sound signal received and processed by the MIC voice processing module into a digital signal, packages the voice data, and sends the voice data out through the wireless module.

2. The mini portable walkie-talkie according to claim 1, characterized in that: The wireless module includes a chip CN1. Pin 1 of the chip CN1 is connected to resistor R1 and then to the SX_RES terminal. Resistor R1 is connected to the V3.3V terminal. Pin 2 of the chip CN1 is connected to the SX_INT terminal, pin 3 is connected to the SX_BUSY terminal, pin 4 is connected to the SX_NSS terminal, pin 5 is connected to the SX_MOSI terminal, pin 6 is connected to the SX_MISO terminal, pin 7 is connected to the SX_SCK terminal, pin 8 is connected to the V3.3V terminal, pin 10 is connected to the VDD33_55 terminal, pin 12 is connected to the VB terminal, pin 13 is connected to the VA terminal, and pin 15 is connected to the Output terminal. Pins 9, 11, 14, and 16 of the chip CN1 are all grounded.

3. The mini portable walkie-talkie according to claim 1, characterized in that: The MCU main control unit is an MS51TC0AE chip.

4. The mini portable walkie-talkie according to claim 1, characterized in that: The key input module includes keys SW1, K2, K4, and K5, wherein: Pin 1 of button SW1 is connected to the REST_MCU terminal, and pins 2 and 3 are both connected to pin 3 of button K2, pin 3 of button K4, and pin 3 of button K5 and grounded. Pin 1 of button K2 is connected to the KEY_ON / OFF terminal; Pin 1 of button K4 is connected to the VOL+ terminal; Pin 1 of button K5 is connected to the VOL- terminal.

5. The mini portable walkie-talkie according to claim 1, characterized in that: The LED indicator module includes light-emitting diodes D2, D5, and D6, wherein: The positive terminal of LED D2 is connected to resistor R13, and resistor R13 is connected to the LEDRed terminal. The negative terminal of LED D2 is connected to the negative terminals of LED D5 and LED D6 and grounded. The positive terminal of the light-emitting diode D5 is connected to the resistor R7, and the resistor R7 is connected to the BAT_Red terminal; The positive terminal of the LED D6 is connected to the resistor R9, and the resistor R9 is connected to the BAT_Green terminal.

6. The mini portable walkie-talkie according to claim 1, characterized in that: The interface module includes chip J1. Pins 1, 2, 3, 4, A1, A10, A12, B1, B10, and B12 of chip J1 are all grounded; The chip J1 has pin A2 connected to the DACL terminal, pin A3 connected to the TP_BAT terminal, pin A4 connected to the VUSB terminal, pin A5 connected to the 3V3 terminal, pin A8 connected to the KEY_SPK terminal, pin A9 connected to the VUSB terminal, and pin A11 connected to the MIC terminal. The chip J1 has pin B2 connected to the DACL terminal, pin B3 connected to the TP_BAT terminal, pin B4 connected to the VUSB terminal, pin B5 connected to the 3V3 terminal, pin B8 connected to the KEY_SPK terminal, pin B9 connected to the VUSB terminal, and pin B11 connected to the MIC terminal. Pins A6 and B6 of chip J1 are both connected to diode D3, and pins A7 and B7 of chip J1 are both connected to diode D4. Diode D3 is connected to the other end of diode D4 and grounded.

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