Intercom with adaptive volume control

Abstract

The utility model provides a kind of intercom of self-adaptive volume control, including pickup module, the pickup module is used to gather environmental noise signal and voice signal;Self-adaptive volume module, the self-adaptive volume module includes digital potentiometer, the resistance of digital potentiometer is adjusted by the self-adaptive volume module, the output end of the self-adaptive volume module is connected with speaker;MCU, the MCU is electrically connected with self-adaptive volume module by IIC bus, the ADC detection foot of the MCU is electrically connected with pickup module;Power module, the power module is electrically connected with pickup module, MCU, self-adaptive volume module, speaker respectively.The utility model cooperates through pickup module, MCU, self-adaptive volume module, after pickup module gathers environmental noise and voice signal, MCU automatically controls digital potentiometer resistance according to signal amplitude, to adjust volume, without user manual operation, improve communication convenience and user experience.

Description

Technical Field

[0001] This utility model belongs to the field of communication equipment technology, and in particular relates to a walkie-talkie with adaptive volume control. Background Technology

[0002] As a two-way mobile communication tool, walkie-talkies do not rely on base stations and have the advantage of instant communication. They are widely used in public security, fire protection, logistics, construction and other fields.

[0003] In actual use, the environment in which walkie-talkies are used varies greatly. In noisy construction sites, busy streets, and other environments with high ambient noise, users need to shout to ensure that the other party can hear them clearly. This not only increases the user's physical exertion but may also cause secondary noise pollution to the surrounding environment due to excessive shouting volume. In relatively quiet office areas and indoor environments, the volume of traditional walkie-talkies cannot be flexibly adjusted. If the volume is too low, the other party will not be able to receive the information clearly, affecting the communication quality. If the volume is too high, it will interfere with the surrounding environment.

[0004] Therefore, how to achieve adaptive volume adjustment of walkie-talkies, enabling them to automatically adjust the output volume according to the actual situation of environmental noise and voice signal, has become an urgent problem to be solved in the current walkie-talkie technology field. Utility Model Content

[0005] This invention provides a walkie-talkie with adaptive volume control, aiming to solve the problem that existing walkie-talkies cannot adaptively adjust the volume according to environmental conditions, resulting in poor communication quality and a poor user experience.

[0006] To achieve the above objectives, this utility model provides a walkie-talkie with adaptive volume control, comprising: The sound pickup module is used to collect ambient noise signals and voice signals; An adaptive volume module, comprising a digital potentiometer, wherein the adaptive volume module is used to adjust the resistance value of the digital potentiometer, and a speaker is connected to the output terminal of the adaptive volume module; The MCU is electrically connected to the adaptive volume module via the IIC bus, and the ADC detection pin of the MCU is electrically connected to the pickup module. The power supply module is electrically connected to the microphone module, MCU, adaptive volume module, and speaker.

[0007] Preferably, the pickup module includes a microphone, resistors R441, R444, and R447, capacitors C444, C440, and C8, and an operational amplifier U401-B. The two ends of capacitor C444 are electrically connected to the microphone's acquisition signal output terminal MIC_NS and resistor R447, respectively. The other end of resistor R447 is electrically connected to pin 6 of operational amplifier U401-B. Pin 7 of operational amplifier U401-B is electrically connected to resistor R447. The two ends of capacitor C8 are electrically connected to the microphone's amplified signal output terminal MIC_DET and the other end of resistor R447, respectively. Pin 5 of operational amplifier U401-B is grounded. Resistor R444 and capacitor C440 are connected in parallel, and their two ends are electrically connected to pins 6 and 7 of operational amplifier U401-B, respectively.

[0008] Preferably, the adaptive volume module includes a digital potentiometer, resistors R1 and R2, capacitor C628, a dual-channel linkage switch J600, resistor R608, capacitor C623, and capacitor C624. Pin 1 of the digital potentiometer is electrically connected to the power supply module, pin 2 of the digital potentiometer is grounded, pin 3 of the digital potentiometer is electrically connected to the VOL_SCL terminal of the MCU through resistor R1, one end of capacitor C628 is electrically connected to pin 3 of the digital potentiometer, and the other end is grounded. Pin 4 of the digital potentiometer is connected to... Resistor R2 is electrically connected to the VOL_SDA terminal of the MCU. Pin 6 of the digital potentiometer is electrically connected to pin 2 of the dual-channel linkage switch J600. Pin 1 of the dual-channel linkage switch J600 is electrically connected to the voice signal output terminal VOICE_OUT. Pin 2 of the dual-channel linkage switch J600 is electrically connected to the volume detection terminal VOL_DET through resistor R608. Resistor R608 is electrically connected to one end of capacitor C623 and capacitor C624 respectively. The other ends of capacitors C623 and C624 are both grounded.

[0009] Preferably, the MCU has a preset high threshold and a preset low threshold for the signal amplitude. When the signal amplitude collected by the pickup module exceeds the preset high threshold, the MCU sends a command through the IIC bus to increase the resistance value of the digital potentiometer, and the speaker automatically outputs a larger volume. When the signal amplitude acquired by the pickup module exceeds a preset low threshold, the MCU sends a command through the IIC bus to reduce the resistance of the digital potentiometer, and the speaker automatically outputs a lower volume.

[0010] The advantages of this utility model over the prior art are: This invention provides a walkie-talkie with adaptive volume control. Through the coordinated operation of the pickup module, MCU, and adaptive volume module, after the pickup module collects ambient noise and voice signals, the MCU automatically controls the resistance value of the digital potentiometer according to the signal amplitude. The speaker outputs a larger volume in noisy environments and a smaller volume in quiet environments, eliminating the need for manual operation by the user, thus improving communication convenience, optimizing communication quality, and enhancing user experience.

[0011] To more clearly illustrate the structural features and effects of this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific embodiments. Attached Figure Description

[0012] Figure 1 This is a circuit diagram of the pickup module of this utility model; Figure 2 This is the circuit diagram of the adaptive volume module of this utility model. Detailed Implementation

[0013] Unless otherwise defined, 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 herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and foregoing drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or foregoing drawings of this application are used to distinguish different objects, not to describe a particular order.

[0014] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0015] To achieve the above objectives, this utility model provides a walkie-talkie with adaptive volume control, see reference. Figure 1-2 As shown, it includes: The sound pickup module is used to collect ambient noise signals and voice signals; An adaptive volume module, comprising a digital potentiometer, wherein the adaptive volume module is used to adjust the resistance value of the digital potentiometer, and a speaker is connected to the output terminal of the adaptive volume module; The MCU is electrically connected to the adaptive volume module via the IIC bus, and the ADC detection pin of the MCU is electrically connected to the pickup module. The power supply module is electrically connected to the microphone module, MCU, adaptive volume module, and speaker.

[0016] In this embodiment, the microphone module is integrated into the walkie-talkie's signal acquisition unit, which collects ambient noise signals and user voice signals in real time, processes the signals, and transmits them to the MCU to provide a detection basis for volume adjustment. The adaptive volume module adjusts the resistance value of the digital potentiometer VR600 according to the MCU's instructions, thereby changing the audio signal transmission gain and accurately outputting the volume through the speaker. The MCU (Microcontroller Unit) is the core control unit of the walkie-talkie, used to send control commands and receive and analyze the signal amplitude data transmitted by the microphone module. The power supply module adopts a 3.3V-5V DC regulated power supply to provide a stable operating voltage for each component and ensure the continuous and reliable operation of the circuit.

[0017] Furthermore, the pickup module includes a microphone, resistors R441, R444, and R447, capacitors C444, C440, and C8, and operational amplifier U401-B. The two ends of capacitor C444 are electrically connected to the microphone's signal output terminal MIC_NS and resistor R447, respectively, to filter low-frequency noise in the microphone's signal. The other end of resistor R447 is electrically connected to pin 6 of operational amplifier U401-B, serving as the signal input terminal. Pin 7 of operational amplifier U401-B is electrically connected to resistor R447, forming a signal feedback path. The two ends of capacitor C8 are electrically connected to the microphone's amplified signal output terminal MIC_DET and the other end of resistor R447, respectively, to stabilize the amplified signal and prevent signal fluctuations. Pin 5 of operational amplifier U401-B is grounded to ensure circuit potential stability. Resistor R444 and capacitor C440 are connected in parallel, with their two ends electrically connected to pins 6 and 7 of operational amplifier U401-B, respectively, forming an RC circuit. Feedback filtering circuits improve the linearity and stability of signal amplification and prevent signal distortion.

[0018] In this embodiment, the microphone is responsible for capturing ambient noise and voice signals, which are transmitted to pin 6 of operational amplifier U401-B via capacitor C444 and resistor R447. Resistor R444 and capacitor C440 form a feedback loop to improve the stability and accuracy of signal amplification. The amplified signal is output through pin 7. At the same time, capacitor C8 transmits the amplified signal from the microphone to the MIC_DET terminal to provide a detection signal source for the MCU. Pin 5 of operational amplifier U401-B is grounded to ensure circuit safety.

[0019] Furthermore, the adaptive volume module includes a digital potentiometer, resistors R1 and R2, capacitor C628, a dual-channel linkage switch J600, resistors R608, capacitors C623 and C624. Pin 1 of the digital potentiometer is electrically connected to the power supply module to obtain the operating voltage. Pin 2 of the digital potentiometer is grounded, forming a circuit loop. Pin 3 of the digital potentiometer is electrically connected to the VOL_SCL terminal of the MCU through resistor R1. One end of capacitor C628 is electrically connected to pin 3 of the digital potentiometer, and the other end is grounded, forming a filter circuit to filter SCL signal noise from the IIC bus. Pin 4 of the digital potentiometer is electrically connected to the VOL_SDA terminal of the MCU through resistor R2, enabling bidirectional IIC communication between the MCU and the digital potentiometer. Pin 6 of the digital potentiometer is electrically connected to pin 2 of the dual-channel linkage switch J600. Pin 1 of the dual-channel linkage switch J600 is electrically connected to the voice signal output terminal VOICE_OUT. The system is in the on state by default and automatically disconnects when the walkie-talkie is not in communication mode to avoid no-load noise. Pin 2 of the dual-channel linkage switch J600 is electrically connected to the volume detection terminal VOL_DET through resistor R608. Resistor R608 is electrically connected to one end of capacitor C623 and capacitor C624 respectively. The other ends of capacitors C623 and C624 are grounded, forming an RC filter circuit to filter high-frequency noise in the audio signal and ensure the accuracy of the volume detection signal.

[0020] In this embodiment, pin 1 of the digital potentiometer is connected to the power supply module to obtain power, pin 2 is grounded to form a loop, pin 3 is connected to the VOL_SCL terminal of the MCU through resistor R1, and capacitor C628 acts as a filter to ensure the stability of the IIC bus communication signal. Pin 4 is connected to the VOL_SDA terminal of the MCU through resistor R2 to realize bidirectional data transmission between the MCU and the digital potentiometer. Pin 1 of the dual-channel linkage switch J600 receives the signal from the VOICE_OUT terminal of the voice signal output terminal, and pin 2 is connected to pin 6 of the digital potentiometer and resistor R608. Resistor R608, together with capacitors C623 and C624, filters noise and transmits the volume detection signal to the VOL_DET terminal to ensure the accuracy of volume adjustment.

[0021] Furthermore, the MCU is equipped with a preset high threshold and a preset low threshold for the signal amplitude. When the signal amplitude collected by the pickup module exceeds the preset high threshold, the MCU sends a command through the IIC bus to increase the resistance value of the digital potentiometer, and the speaker automatically outputs a larger volume. When the signal amplitude acquired by the pickup module exceeds a preset low threshold, the MCU sends a command through the IIC bus to reduce the resistance of the digital potentiometer, and the speaker automatically outputs a lower volume.

[0022] In this embodiment, the MCU acts as the control core. It receives the signal transmitted by the pickup module in real time through the ADC detection pin, analyzes and judges the signal amplitude, and then sends control commands to the adaptive volume module through the IIC bus. The power supply module provides stable power support for the pickup module, MCU, adaptive volume module and speaker, ensuring that all components work together and that the walkie-talkie continues to work stably.

[0023] During operation, the power supply module starts and supplies power to all components. The microphone of the pickup module collects ambient noise signals and user voice signals in real time. After the signals are amplified by the operational amplifier U401-B, they are transmitted to the ADC detection pin of the MCU. The MCU analyzes the amplitude of the received signals. When a strong signal amplitude is detected (i.e., the environment is noisy or the voice signal needs to be enhanced), it sends a command to increase the resistance value of the digital potentiometer through the IIC bus (VOL_SCL and VOL_SDA terminals). The signal transmission gain of the adaptive volume module is increased, and the speaker automatically outputs a larger volume. When a weak signal amplitude is detected (i.e., the environment is quiet or the voice signal does not need to be enhanced), the MCU sends a command to decrease the resistance value of the digital potentiometer. The signal transmission gain is reduced, and the speaker automatically outputs a smaller volume. Throughout the process, the dual-channel linkage switch J600 controls the on / off of the voice signal, and the filter circuit composed of resistors and capacitors ensures the stability of signal transmission, realizing dynamic adaptive adjustment of volume according to the environment and voice conditions.

[0024] In summary, this utility model provides a walkie-talkie with adaptive volume control. Through the coordinated operation of the pickup module, MCU, and adaptive volume module, after the pickup module collects ambient noise and voice signals, the MCU automatically controls the resistance value of the digital potentiometer according to the signal amplitude. The speaker outputs a larger volume in noisy environments and a smaller volume in quiet environments, eliminating the need for manual operation by the user, thus improving communication convenience, optimizing communication quality, and enhancing the user experience.

[0025] The technical principles of this utility model have been described above with reference to specific embodiments, which are merely preferred embodiments of this utility model. The protection scope of this utility model is not limited to the above embodiments; all technical solutions falling within the scope of this utility model's concept are protected. Those skilled in the art can conceive of other specific embodiments of this utility model without creative effort, and these embodiments will all fall within the protection scope of this utility model.

Claims

1. A walkie-talkie with adaptive volume control, characterized in that, include: The sound pickup module is used to collect ambient noise signals and voice signals; An adaptive volume module, comprising a digital potentiometer, wherein the adaptive volume module is used to adjust the resistance value of the digital potentiometer, and a speaker is connected to the output terminal of the adaptive volume module; The MCU is electrically connected to the adaptive volume module via the IIC bus, and the ADC detection pin of the MCU is electrically connected to the pickup module. The power supply module is electrically connected to the microphone module, MCU, adaptive volume module, and speaker.

2. The walkie-talkie with adaptive volume control according to claim 1, characterized in that, The pickup module includes a microphone, resistors R441, R444, and R447, capacitors C444, C440, and C8, and an operational amplifier U401-B. The two ends of capacitor C444 are electrically connected to the microphone's acquisition signal output terminal MIC_NS and resistor R447, respectively. The other end of resistor R447 is electrically connected to pin 6 of operational amplifier U401-B. Pin 7 of operational amplifier U401-B is electrically connected to resistor R447. The two ends of capacitor C8 are electrically connected to the microphone's amplified signal output terminal MIC_DET and the other end of resistor R447, respectively. Pin 5 of operational amplifier U401-B is grounded. Resistor R444 and capacitor C440 are connected in parallel, and their two ends are electrically connected to pins 6 and 7 of operational amplifier U401-B, respectively.

3. The walkie-talkie with adaptive volume control according to claim 1, characterized in that, The adaptive volume module includes a digital potentiometer, resistors R1 and R2, capacitor C628, a dual-channel linkage switch J600, resistors R608 and C623, and capacitor C624. Pin 1 of the digital potentiometer is electrically connected to the power supply module, pin 2 is grounded, and pin 3 is electrically connected to the VOL_SCL terminal of the MCU via resistor R1. One end of capacitor C628 is electrically connected to pin 3 of the digital potentiometer, and the other end is grounded. Pin 4 of the digital potentiometer is connected to a resistor... R2 is electrically connected to the VOL_SDA terminal of the MCU. Pin 6 of the digital potentiometer is electrically connected to pin 2 of the dual-channel linkage switch J600. Pin 1 of the dual-channel linkage switch J600 is electrically connected to the voice signal output terminal VOICE_OUT. Pin 2 of the dual-channel linkage switch J600 is electrically connected to the volume detection terminal VOL_DET through resistor R608. Resistor R608 is electrically connected to one end of capacitor C623 and capacitor C624 respectively. The other ends of capacitors C623 and C624 are both grounded.

4. The walkie-talkie with adaptive volume control according to claim 1, characterized in that, The MCU has a preset high threshold and a preset low threshold for the signal amplitude. When the signal amplitude collected by the pickup module exceeds the preset high threshold, the MCU sends a command through the IIC bus to increase the resistance of the digital potentiometer, and the speaker automatically outputs a larger volume. When the signal amplitude acquired by the pickup module exceeds a preset low threshold, the MCU sends a command through the IIC bus to reduce the resistance of the digital potentiometer, and the speaker automatically outputs a lower volume.

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