Intelligent ring and automatic microphone switching method thereof

Abstract

The embodiment of the invention provides an intelligent ring and an automatic microphone switching method thereof. The intelligent ring comprises a shell and a voice control circuit, and the voice control circuit is arranged in the shell; the voice control circuit comprises an audio processing chip, a signal conditioning module, a switch routing module, a sensor and at least two microphones, the sensor and the at least two microphones are connected to the switch routing module, and the switch routing module, the signal conditioning module and the audio processing chip are connected in sequence; pickup holes are formed in the positions, corresponding to the microphones, of the shell, the sensor is arranged at the position of one microphone, and the detection end of the sensor faces the pickup holes. And under the condition that the sensor is triggered, a trigger signal is sent to the switch routing module to enable the microphone to perform switching processing. According to the scheme of the embodiment of the invention, automatic switching processing of the microphone can be carried out under the condition that the microphone hole is shielded.

Description

Technical Field

[0001] This application relates to the field of portable wearable device technology, and in particular to a smart ring and its automatic microphone switching method. Background Technology

[0002] With the continuous development of science and technology, wearable devices have gained increasing popularity and application due to their ability to continuously collect physiological, behavioral, and environmental data through sensors, enabling functions such as health monitoring, information interaction, and motion tracking. Among these, smart rings are wearable devices that integrate modern technology and stylish design. Their precise monitoring and seamless wearing experience have already given them significant advantages in specific scenarios such as sleep health. However, the voice operation and recording functions of smart rings often require a microphone; however, due to the wearing position and the unique structure of smart rings, the microphone opening is susceptible to being blocked by fingers, leading to malfunctions in voice operation and recording. Summary of the Invention

[0003] The embodiments of this application are intended to at least solve one of the technical problems existing in the prior art.

[0004] Therefore, this application proposes a smart ring that can automatically switch microphones when the microphone opening is blocked, thereby ensuring the normal operation of the smart ring's voice operation and recording functions.

[0005] This application also proposes an automatic microphone switching method based on the above-mentioned smart ring.

[0006] The smart ring according to the first aspect of the embodiments of this application includes: case; A voice control circuit is disposed inside the housing; the voice control circuit includes an audio processing chip, a signal conditioning module, a switch routing module, a sensor, and at least two microphones, wherein the sensor and at least two microphones are all connected to the switch routing module, and the switch routing module, the signal conditioning module, and the audio processing chip are connected in sequence; The housing has a pickup hole at a position corresponding to each of the microphones, and the sensor is located at one of the microphones with its detection end facing the pickup hole. When the sensor is triggered, a trigger signal is sent to the switch routing module to cause the microphone to switch.

[0007] According to some embodiments of the present application, the signal conditioning module includes a filtering module, a DC blocking module, and a bias module. The switch selection module, the filtering module, the DC blocking module, and the audio processing chip are connected in sequence. The bias module is also connected between the filtering module and the DC blocking module.

[0008] According to some embodiments of the present application, the filtering module includes a first capacitor and a first inductor. One end of the first inductor is connected to the output terminal of the switch routing module, and the other end of the first inductor is connected to one end of the first capacitor. The other end of the first capacitor is connected to a reference ground, and the connection point between the other end of the first inductor and one end of the first capacitor is also connected to the DC blocking module and the bias module, respectively.

[0009] According to some embodiments of the present application, the bias module includes a first resistor, a second resistor, and a second capacitor. One end of the first resistor and one end of the second capacitor are both connected to one end of the second resistor. The other end of the second resistor is connected between the filtering module and the DC blocking module. The other end of the second capacitor is connected to a reference ground. The other end of the first resistor is connected to a microphone power supply.

[0010] According to some embodiments of the present application, the DC blocking module includes a third capacitor and a fourth capacitor. One end of the third capacitor is connected to the first control pin of the audio processing chip, and the other end of the third capacitor is connected to the filtering module and the biasing module respectively. One end of the fourth capacitor is connected to the second control pin of the audio processing chip, and the other end of the fourth capacitor is connected to the reference ground.

[0011] According to some embodiments of this application, the switch selection module includes an analog switch chip and a fifth capacitor. One end of the fifth capacitor is connected to the power supply terminal of the analog switch chip, and the other end of the fifth capacitor is connected to a reference ground. The logic control terminal of the analog switch chip is connected to the signal output terminal of the sensor. The common signal terminal of the analog switch chip is connected to the filtering module. Both the normally open and normally closed terminals of the analog switch chip are connected to the microphone.

[0012] According to some embodiments of this application, an anti-static diode is provided between the normally open terminal of the analog switch chip and the microphone, and between the normally closed terminal of the analog switch chip and the microphone.

[0013] According to some embodiments of the present application, the sensor is any one of the following: an infrared sensor, a capacitive touch sensor, an ultrasonic touch sensor, and a laser sensor.

[0014] The microphone automatic switching method according to the second aspect of the present application is applied to the smart ring described in the above embodiment. The microphone automatic switching method includes: When the sensor detects that the corresponding pickup hole is blocked, it generates a trigger signal based on the sensor and sends the trigger signal to the switch selection module. Based on the trigger signal, the microphone switching process is performed using the switch routing module.

[0015] According to some embodiments of this application, when the detection end of the sensor detects that the corresponding pickup hole is blocked, generating a trigger signal based on the sensor and sending the trigger signal to the switch selection module includes: When the sensor detects that the corresponding pickup hole is blocked, the sensor output signal is changed from a low level signal to a high level signal, and the high level signal is sent to the switch selection module. Alternatively, when the sensor's detection end detects that the corresponding pickup hole is blocked, the sensor output signal is converted from a high-level signal to a low-level signal, and the low-level signal is sent to the switch selection module.

[0016] The smart ring according to the embodiments of this application has at least the following beneficial effects: The smart ring includes a housing and a voice control circuit disposed inside the housing, wherein the voice control circuit includes an audio processing chip, a signal conditioning module, a switch routing module, a sensor, and at least two microphones; and the sensor and at least two microphones are all connected to the switch routing module, and the switch routing module, the signal conditioning module, and the audio processing chip are sequentially connected; a pickup hole is also provided on the housing at a position relative to the microphones, each microphone has a corresponding pickup hole, and a sensor is also provided at the position of one microphone, with the sensor's detection end facing the corresponding pickup hole; during the use of the smart ring... Under normal circumstances, the microphone corresponding to the sensor can be used for voice operation or recording. When the pickup hole of the microphone corresponding to the sensor is blocked, the sensor will detect the blockage and generate a trigger signal, which will be sent to the switch selection module. The switch selection module will automatically switch the microphone according to the trigger signal, using other unblocked microphones to collect voice signals, so that voice operation or recording can be performed normally. Thus, the user does not need to manually rotate the smart ring to ensure the normal operation of voice operation or recording functions, which brings great convenience to the user. Attached Figure Description

[0017] The accompanying drawings are provided to further understand the technical solutions of this disclosure and constitute a part of the specification. They are used together with the embodiments of this disclosure to explain the technical solutions of this disclosure and do not constitute a limitation on the technical solutions of this disclosure.

[0018] Figure 1 This is a circuit diagram of the voice control circuit of a smart ring provided in one embodiment of this application; Figure 2 This is a detailed circuit diagram of the voice control circuit of a smart ring provided in one embodiment of this application; Figure 3 This is a schematic diagram of the sensor of a smart ring provided in one embodiment of this application; Figure 4 This is a flowchart of an automatic microphone switching method provided in one embodiment of this application; Figure 5 yes Figure 4 Step S100 method sub-flowchart; Figure 6 yes Figure 4 Another method flowchart for step S100. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the embodiments of this application will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are only used to explain the embodiments of this application and are not intended to limit the embodiments of this application.

[0020] In the description of the embodiments of this application, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0021] In the description of the embodiments of this application, unless otherwise expressly limited, terms such as setting, installing, and connecting should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in the embodiments of this application in combination with the specific content of the technical solution.

[0022] This application provides a smart ring and its automatic microphone switching method. The smart ring includes a housing and a voice control circuit disposed inside the housing. The voice control circuit includes an audio processing chip, a signal conditioning module, a switch routing module, a sensor, and at least two microphones. The sensor and at least two microphones are all connected to the switch routing module, and the switch routing module, signal conditioning module, and audio processing chip are sequentially connected. A pickup hole is also provided on the housing at a position relative to the microphones, with each microphone corresponding to a specific pickup hole. A sensor is also provided at the location of one microphone, with the sensor's detection end facing the corresponding pickup hole. During the use of the smart ring... Under normal circumstances, the microphone corresponding to the sensor can be used for voice operation or recording. When the pickup hole of the microphone corresponding to the sensor is blocked, the sensor will detect the blockage and generate a trigger signal, which will be sent to the switch selection module. The switch selection module will automatically switch the microphone according to the trigger signal, using other unblocked microphones to collect voice signals, so that voice operation or recording can be performed normally. Thus, the user does not need to manually rotate the smart ring to ensure the normal operation of voice operation or recording functions, which brings great convenience to the user.

[0023] The embodiments of this application will be further described below with reference to the accompanying drawings.

[0024] like Figure 1 As shown, Figure 1 This is a circuit diagram of the voice control circuit of a smart ring provided in one embodiment of this application. The smart ring of this application embodiment includes a housing, and a voice control circuit is disposed inside the housing. The voice control circuit includes an audio processing chip 500, a signal conditioning module 400, a switch routing module 300, a sensor 200, and at least two microphones 100. The sensor 200 and the at least two microphones 100 are all connected to the switch routing module 300. The switch routing module 300, the signal conditioning module 400, and the audio processing chip 500 are connected in sequence. A pickup hole is also disposed on the housing at a position relative to the microphones 100. Each microphone 100 has a corresponding pickup hole. A sensor 200 is also disposed at the position of each microphone 100, and the detection end of the sensor 200 faces the corresponding pickup hole.

[0025] It should be noted that traditional smart rings only have one microphone 100, and the microphone 100's pickup hole is located on the outer circumference of the smart ring's shell. Due to the structural characteristics of smart rings, during use, when the smart ring rotates, the microphone 100's pickup hole will be blocked when it's positioned between two fingers. At this time, if the user needs to use the smart ring's voice operation or recording functions, the blocked microphone 100 may prevent these functions from working properly or accurately capturing voice signals. To continue using these functions, the user needs to manually rotate the smart ring to unblock the microphone 100, resulting in an inconvenient user experience. To solve the aforementioned problems, this application only requires setting a sensor 200 and at least two microphones 100 in the smart ring. Under normal circumstances, the microphone 100 corresponding to the sensor 200 can be used for voice operation or recording. When the pickup hole corresponding to the microphone 100 of the sensor 200 is blocked, the sensor 200 detects the blockage and is triggered to generate a trigger signal, which is sent to the switch routing module 300. The switch routing module 300 will automatically switch the microphones 100 according to the trigger signal, using other unblocked microphones 100 to collect voice signals, so that voice operation or recording can run normally. Thus, the user does not need to manually rotate the smart ring to ensure the normal operation of voice operation or recording functions, bringing great convenience to the user. By adding a sensor 200, a switch routing module 300, and at least one microphone 100 to the smart ring, the original microphone 100 signal processing channel can be used to acquire data from microphones 100 at different locations. This makes high use of the smart ring's hardware resources and eliminates the need for additional hardware pins and software logic to switch microphone 100 channels, thus saving costs significantly.

[0026] It is worth noting that the microphone 100's pickup holes can be located on the outer peripheral surface of the housing. To prevent the pickup holes of multiple microphones 100 inside the smart ring from being blocked, the pickup holes can be distributed at appropriate positions on the outer peripheral surface of the housing. For example, when the smart ring has two microphones 100, the pickup holes of the two microphones 100 can be positioned at a 90-degree angle to each other, so that if one microphone 100's pickup hole is blocked, the other microphone 100's pickup hole will not be blocked. It is foreseeable that if the pickup holes of the two microphones 100 are positioned at a 180-degree angle, both pickup holes may be located between the fingers, which would affect the normal operation of the smart ring's voice operation and recording functions. Therefore, such a setting is avoided in actual use. The position of the microphone 100's pickup holes on the outer peripheral surface of the housing can be flexibly set according to actual needs; no specific limitation is made here, as long as it prevents the pickup holes of multiple microphones 100 on the smart ring from being blocked simultaneously.

[0027] It is worth noting that the sensor 200 can be set at the location of one of the microphones 100 to detect whether the corresponding pickup hole of the microphone 100 is blocked. When the pickup hole of the microphone 100 is blocked, the sensor 200 will be triggered to generate a trigger signal, providing a basis for the subsequent automatic switching of the microphone 100. When the smart ring has two microphones 100, only the sensor 200 needs to be set at the location of one of the microphones 100 to achieve automatic switching of the microphone 100. When the smart ring has three or more microphones 100, the sensor 200 can be set at the location of more than one microphone 100. By selecting the type of the switch routing module 300 and setting the corresponding microphone 100 switching strategy, microphone 100 switching can also be performed when the pickup hole is blocked, so as to ensure that the voice operation and recording functions of the smart ring can operate normally.

[0028] It is worth noting that the switch routing module 300 can select and process at least two microphone channels 100 in the smart ring. For example, during use, the smart ring is equipped with two microphones 100, which can be divided into a primary microphone and a backup microphone. A sensor 200 is set at the corresponding position of the primary microphone. Under normal circumstances, the primary microphone is used for voice acquisition and processing. However, when the pickup hole of the primary microphone is blocked, the sensor 200 detects that the pickup hole of the primary microphone is blocked and sends a trigger signal to the switch routing module 300. Upon receiving the trigger signal, the switch routing module 300 will automatically perform microphone switching processing and select the backup microphone for voice acquisition and processing.

[0029] It should be noted that the switch selection module 300, the signal conditioning module 400, and the audio processing chip 500 are connected in sequence, so that the voice signal output by the switch selection module 300 can be processed by the signal conditioning module 400, such as filtering and DC blocking by capacitors, so that the audio processing chip 500 can accurately perform voice conversion processing.

[0030] like Figure 2 As shown, the signal conditioning module 400 includes a filtering module 410, a DC blocking module 430, and a bias module 420. The switch selection module 300, filtering module 410, DC blocking module 430, and audio processing chip 500 are connected sequentially. The bias module 420 is also connected between the filtering module 410 and the DC blocking module 430. The filtering module 410 effectively filters the analog audio signal output from the switch selection module 300 to remove interference signals, thereby significantly improving the accuracy of subsequent audio processing. The DC blocking module 430 blocks the DC component in the audio signal, protecting the circuit and further improving the accuracy of subsequent audio processing. The bias module 420 provides the microphone 100 with DC operating voltage and load, enabling the microphone 100 to operate normally.

[0031] like Figure 2 As shown, in some embodiments of this application, the filtering module 410 includes a first capacitor C1 and a first inductor B1. One end of the first inductor B1 is connected to the output terminal of the switch selection module 300, and the other end of the first inductor B1 is connected to one end of the first capacitor C1. The other end of the first capacitor C1 is connected to the reference ground. The connection point between the other end of the first inductor B1 and one end of the first capacitor C1 is also connected to the DC blocking module 430 and the bias module 420, respectively.

[0032] It is worth noting that the first inductor B1 and the first capacitor C1 form a filter module 410. The first inductor B1 can block high-frequency noise in the voice signal. Then, the first capacitor C1 is used to bypass the blocked high-frequency noise to the reference ground to filter the noise in the voice signal output by the switch selection module 300, so as to improve the accuracy of subsequent voice processing.

[0033] like Figure 2 As shown, in some embodiments of this application, the bias module 420 includes a first resistor R1, a second resistor R2, and a second capacitor C2. One end of the first resistor R1 and one end of the second capacitor C2 are both connected to one end of the second resistor R2. The other end of the second resistor R2 is connected between the filter module 410 and the DC blocking module 430. The other end of the second capacitor C2 is connected to the reference ground. The other end of the first resistor R1 is connected to the power supply of the microphone 100.

[0034] It is worth noting that the bias module 420 in this embodiment can provide a stable operating voltage and load for the microphone 100, enabling the microphone 100 to operate stably and normally. Specifically, the first resistor R1 functions as a current limiter and voltage divider, determining the main voltage division of the bias voltage; the second resistor R2 functions as a voltage divider and discharger, working in conjunction with the first resistor R1 to set the bias voltage; and the second capacitor C2 enables power supply decoupling and filtering, removing high-frequency noise at the bias point.

[0035] like Figure 2 As shown, in some embodiments of this application, the DC blocking module 430 includes a third capacitor C3 and a fourth capacitor C4. One end of the third capacitor C3 is connected to the first control pin of the audio processing chip 500, and the other end of the third capacitor C3 is connected to the filtering module 410 and the biasing module 420 respectively. One end of the fourth capacitor C4 is connected to the second control pin of the audio processing chip 500, and the other end of the fourth capacitor C4 is connected to the reference ground.

[0036] It is worth noting that the third capacitor C3 and the fourth capacitor C4 in this embodiment can form a DC blocking module 430, which can effectively block the DC component in the voice signal. This not only protects the circuit but also ensures that the voice signal input to the audio processing chip 500 is pure, thereby improving the accuracy of voice processing.

[0037] like Figure 2 and Figure 3As shown, in some embodiments of this application, the switch selection module 300 includes an analog switch chip U1 and a fifth capacitor C5. One end of the fifth capacitor C5 is connected to the power supply terminal of the analog switch chip U1, and the other end of the fifth capacitor C5 is connected to the reference ground. The logic control terminal of the analog switch chip U1 is connected to the signal output terminal of the sensor 200, and the common signal terminal of the analog switch chip U1 is connected to the filter module 410. Both the normally open and normally closed terminals of the analog switch chip U1 are connected to a microphone 100.

[0038] It is worth noting that the fifth capacitor C5 in this embodiment serves as a decoupling capacitor, stabilizing the power supply voltage of the analog switch chip U1, filtering out noise, preventing self-oscillation, and ensuring clean and interference-free switching operation. The analog switch chip U1 in this embodiment can be an SGM3719, with both its normally open and normally closed terminals connected to microphones 100. The logic control terminal of the SGM3719 is connected to the signal output terminal of the sensor 200, allowing the SGM3719 to trigger the switching of microphones 100 based on changes in the signal input from the sensor 200. The model of the analog switch chip U1 can be selected based on the number of microphones 100 set in the smart ring. For example, if there are two microphones 100, the analog switch chip U1 needs to be able to achieve two-way selection, which the SGM3719 can meet; if there are three microphones 100, the analog switch chip U1 needs to be able to achieve three-way selection, which the 74HC4053 can meet.

[0039] like Figure 2 As shown, in some embodiments of this application, anti-static diodes are provided between the normally open terminal of the analog switch chip U1 and the microphone 100, and between the normally closed terminal of the analog switch chip U1 and the microphone 100. When static electricity from a human body or the environment enters through the pickup hole, it instantly conducts and discharges the high voltage. The anti-static diode can protect the internal circuit components and the subsequent audio processing chip 500 from being damaged or burned out, ensuring that the microphone 100 does not distort and can operate stably and reliably for a long time. The anti-static diode can be of ESD type.

[0040] In some embodiments of this application, the sensor 200 can be any of the following: an infrared sensor, a capacitive touch sensor, an ultrasonic touch sensor, and a laser sensor. When the microphone aperture is blocked, the sensor 200 is triggered, sending a trigger signal to the switch routing module 300 for switching and routing processing of the microphone 100. It is worth noting that in practical applications, the appropriate sensor 200 can be selected based on actual needs and cost considerations; no limitation is made here.

[0041] like Figure 4As shown, in some embodiments of this application, one embodiment of this application also provides an automatic microphone switching method, applied to the smart ring of the above embodiments. The automatic microphone switching method may include, but is not limited to, the following steps: Step S100: When the sensor's detection end detects that the corresponding pickup hole is blocked, a trigger signal is generated based on the sensor and sent to the switch selection module. Step S200: Based on the trigger signal, the microphone switching process is performed using the switch routing module.

[0042] It should be noted that under normal circumstances, the microphone corresponding to the sensor can be used for voice operation or recording. However, when the pickup hole of the microphone corresponding to the sensor is blocked, the sensor will detect the blockage and generate a trigger signal, which will be sent to the switch routing module. The switch routing module will then automatically switch the microphone according to the trigger signal, using other unblocked microphones to collect voice signals, so that voice operation or recording can operate normally. This means that users do not need to manually rotate the smart ring to ensure the normal operation of voice operation or recording functions, bringing great convenience to users.

[0043] For example, a smart ring is equipped with two microphones. One of the microphones has an infrared sensor at its location. Under normal circumstances, the microphone corresponding to the infrared sensor can be used for voice operation or recording. When the pickup hole of the microphone corresponding to the infrared sensor is blocked, the infrared sensor detects the blockage and is triggered to generate a trigger signal, which is sent to the switch routing module. The switch routing module will then automatically switch the microphone according to the trigger signal, using the other unblocked microphone to collect the voice signal, so that voice operation or recording can proceed normally.

[0044] like Figure 5 As shown, in some embodiments of this application, when the sensor's detection end detects that the corresponding pickup hole is blocked, a trigger signal is generated based on the sensor and sent to the switch selection module, which may include, but is not limited to, the following steps: In step S110, when the sensor's detection end detects that the corresponding pickup hole is blocked, the sensor output signal is changed from a low-level signal to a high-level signal, and the high-level signal is sent to the switch selection module.

[0045] It should be noted that when the microphone hole is not blocked, the sensor continuously outputs a low-level signal to the switch selection module, and the switch selection module will not switch the microphone at this time. When the sensor's detection end detects that the corresponding microphone hole is blocked, the sensor output signal will change from a low-level signal to a high-level signal and send the high-level signal to the switch selection module so that the switch selection module can perform automatic microphone switching.

[0046] like Figure 6 As shown, in some embodiments of this application, when the sensor's detection end detects that the corresponding pickup hole is blocked, a trigger signal is generated based on the sensor and sent to the switch selection module, which may include, but is not limited to, the following steps: In step S120, when the sensor's detection end detects that the corresponding pickup hole is blocked, the sensor output signal is changed from a high-level signal to a low-level signal, and the low-level signal is sent to the switch selection module.

[0047] It should be noted that when the microphone hole is not blocked, the sensor continuously outputs a high-level signal to the switch selection module, and the switch selection module will not switch the microphone at this time. When the sensor's detection end detects that the corresponding microphone hole is blocked, the sensor output signal will change from a high-level signal to a low-level signal and send the low-level signal to the switch selection module so that the switch selection module can perform automatic microphone switching.

[0048] The above is a detailed description of the preferred embodiments of this application. However, the embodiments of this application are not limited to the above-described implementation methods. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the embodiments of this application. All such equivalent modifications or substitutions are included within the scope defined by the claims of the embodiments of this application.

Claims

1. A smart ring, characterized in that, include: case; A voice control circuit is disposed inside the housing; the voice control circuit includes an audio processing chip, a signal conditioning module, a switch routing module, a sensor, and at least two microphones, wherein the sensor and at least two microphones are all connected to the switch routing module, and the switch routing module, the signal conditioning module, and the audio processing chip are connected in sequence; The housing has a pickup hole at a position corresponding to each of the microphones, and the sensor is located at one of the microphones with its detection end facing the pickup hole. When the sensor is triggered, a trigger signal is sent to the switch routing module to cause the microphone to switch.

2. The smart ring according to claim 1, characterized in that, The signal conditioning module includes a filtering module, a DC blocking module, and a bias module. The switch selection module, the filtering module, the DC blocking module, and the audio processing chip are connected in sequence. The bias module is also connected between the filtering module and the DC blocking module.

3. The smart ring according to claim 2, characterized in that, The filtering module includes a first capacitor and a first inductor. One end of the first inductor is connected to the output terminal of the switch selection module, and the other end of the first inductor is connected to one end of the first capacitor. The other end of the first capacitor is connected to a reference ground. The connection between the other end of the first inductor and one end of the first capacitor is also connected to the DC blocking module and the bias module, respectively.

4. The smart ring according to claim 2, characterized in that, The bias module includes a first resistor, a second resistor, and a second capacitor. One end of the first resistor and one end of the second capacitor are both connected to one end of the second resistor. The other end of the second resistor is connected between the filter module and the DC blocking module. The other end of the second capacitor is connected to a reference ground. The other end of the first resistor is connected to the microphone power supply.

5. The smart ring according to claim 2, characterized in that, The DC blocking module includes a third capacitor and a fourth capacitor. One end of the third capacitor is connected to the first control pin of the audio processing chip, and the other end of the third capacitor is connected to the filtering module and the biasing module respectively. One end of the fourth capacitor is connected to the second control pin of the audio processing chip, and the other end of the fourth capacitor is connected to the reference ground.

6. The smart ring according to claim 2, characterized in that, The switch selection module includes an analog switch chip and a fifth capacitor. One end of the fifth capacitor is connected to the power supply terminal of the analog switch chip, and the other end of the fifth capacitor is connected to a reference ground. The logic control terminal of the analog switch chip is connected to the signal output terminal of the sensor. The common signal terminal of the analog switch chip is connected to the filtering module. Both the normally open and normally closed terminals of the analog switch chip are connected to the microphone.

7. The smart ring according to claim 6, characterized in that, An anti-static diode is provided between the normally open terminal of the analog switch chip and the microphone, and between the normally closed terminal of the analog switch chip and the microphone.

8. The smart ring according to claim 1, characterized in that, The sensor can be any one of the following: an infrared sensor, a capacitive touch sensor, an ultrasonic touch sensor, or a laser sensor.

9. A method for automatic microphone switching, characterized in that, The microphone automatic switching method, applied to the smart ring according to any one of claims 1 to 7, includes: When the sensor detects that the corresponding pickup hole is blocked, it generates a trigger signal based on the sensor and sends the trigger signal to the switch selection module. Based on the trigger signal, the microphone switching process is performed using the switch routing module.

10. The automatic microphone switching method according to claim 9, characterized in that, When the sensor's detection end detects that the corresponding pickup hole is blocked, the system generates a trigger signal based on the sensor and sends the trigger signal to the switch selection module, including: When the sensor detects that the corresponding pickup hole is blocked, the sensor output signal is changed from a low level signal to a high level signal, and the high level signal is sent to the switch selection module. Alternatively, when the sensor's detection end detects that the corresponding pickup hole is blocked, the sensor output signal is converted from a high-level signal to a low-level signal, and the low-level signal is sent to the switch selection module.

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