Sound acquisition circuit

Abstract

The utility model provides a sound acquisition circuit, which relates to the technical field of sound acquisition and comprises a main control chip, a sound sensor module, a wireless communication module, a Bluetooth module, a storage device, a cloud server and a mobile terminal. Wherein the main control chip is in communication connection with the mobile terminal through the Bluetooth module, receives a control instruction sent by the mobile terminal and works based on the control instruction; the sound sensor module is connected with the main control chip and converts collected sound signals into digital signals. The main control chip is connected with the cloud server through the wireless communication module, the main control chip is further connected with the storage device, and the main control chip stores the digital signals into the storage device and sends the digital signals into the cloud server through the wireless communication module. According to the invention, remote control of the sound acquisition circuit is realized, and the convenience and flexibility of operation are improved; and the storage device and the cloud server are arranged, so that real-time transmission and backup of data are realized, and data loss is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of sound collection, in particular to a sound collection circuit. Background Art

[0002] Sound acquisition circuits are usually used to capture sound and convert the captured sound into digital signals or analog voltage signals. Therefore, sound acquisition circuits are usually used in microphones, sound sensors, and related preamplifiers and signal processing circuits to achieve functions such as voice recognition and audio recording.

[0003] Existing sound collection circuits are usually equipped with sound sensors to collect original sound signals, which are then sampled by the analog-to-digital converter of the main control chip to convert the analog signals into digital signals. The main control chip then sends the digital signal data to the Bluetooth 5.0 module through the serial port and then passes it to the host computer.

[0004] However, existing sound collection circuits usually have the following problems:

[0005] 1. The main control chip converts the original sound collected in real time into a digital signal and transmits it directly to the host computer. If the host computer does not save the received signal in time, it will not be able to backtrack and query the previously collected sound in the sound collection circuit, resulting in sound loss.

[0006] 2. The main control chip plays the role of signal conversion and transmission to the host computer, and cannot convert and transmit signals based on user control according to user needs. Utility Model Content

[0007] In view of the above-mentioned shortcomings of the prior art, the present invention provides a sound collection circuit, which solves the technical problems that the prior art sound collection circuit lacks storage function and cannot selectively obtain sound signals according to user needs.

[0008] The utility model provides a sound collection circuit, comprising a main control chip, a sound sensor module, a wireless communication module, a Bluetooth module, a storage device, a cloud server and a mobile terminal; the main control chip is connected to the Bluetooth module, the Bluetooth module is communicatively connected to the mobile terminal, the main control chip receives a control instruction sent by the mobile terminal through the Bluetooth module, and the main control chip works based on the control instruction; the output end of the sound sensor module is connected to the input end of the main control chip, and the main control chip converts the sound signal collected by the sound sensor module into a digital signal for output; the output end of the main control chip is connected to the wireless communication module, the wireless communication module is wirelessly connected to the cloud server, and the output end of the main control chip is also connected to the storage device, the main control chip stores the digital signal in the storage device, and sends the digital signal to the cloud server through the wireless communication module.

[0009] Optionally, the sound sensor module includes a plurality of sound sensors; each of the sound sensors is connected to an input pin of the main control chip, and on the main control chip, each of the input pins is connected to an output pin.

[0010] Optionally, the control instruction is used to control the conduction state of each input pin and each output pin on the main control chip; the mobile terminal sends the control instruction to the main control chip so that the main control chip receives the sound signal collected by one or more sound sensors in the sound sensor module.

[0011] Optionally, the mobile terminal is communicatively connected to the cloud server; the mobile terminal sends a voice extraction instruction to the cloud server, the cloud server selects a target voice based on the voice extraction instruction, and sends the target voice to the mobile terminal.

[0012] Optionally, an analog-to-digital converter and a signal processing unit are provided in the main control chip; the input end of the analog-to-digital converter is connected to the output module of the sound sensor, for receiving the sound signal collected by the sound sensor and converting the sound signal into the digital signal; the output end of the analog-to-digital converter is connected to the input end of the signal processing unit, and the output end of the signal processing unit is respectively connected to the wireless communication module and the storage device, and the signal processing unit is used to process the digital signal, store it in the storage device, and send the digital signal to the cloud server through the wireless communication module.

[0013] Optionally, the sound collection circuit further includes a low-pass filter module; the input end of the low-pass filter module is connected to the output end of the sound sensor module, and the output end of the low-pass filter module is connected to the input end of the main control chip.

[0014] Optionally, the storage device includes an SD card slot and an SD card; the SD card slot is connected to the main control chip, and the SD card is movably installed in the SD card slot.

[0015] Optionally, the sound collection circuit further includes a crystal oscillator reset module; the crystal oscillator reset module is connected to the main control chip.

[0016] Optionally, the sound collection circuit further includes a key module; the key module is connected to the main control chip.

[0017] Optionally, the sound collection circuit further includes a power supply module; the power supply module includes an LDO voltage regulator unit, which is used to receive a DC input voltage of 3.3V-15V and convert it into a DC output voltage of 3.3V to power the sound collection circuit.

[0018] The sound collection circuit provided by the utility model is connected to the main control chip by a Bluetooth module by a mobile terminal, and control instructions can be sent to the main control chip to realize remote control of the sound collection circuit, so that users can control and monitor the entire process of sound collection according to needs, thereby improving the convenience and flexibility of operation; setting up a storage device and a cloud server realizes real-time transmission and backup of data, ensuring the security and integrity of the data, wherein the data stored on the cloud server can be accessed and managed at any time, realizing multi-platform interaction, providing users with a more flexible and convenient data management method, and combined with the data storage and processing capabilities of the cloud server, it can realize intelligent analysis and application of sound data, and the storage device serves as a backup medium for data to ensure the security of the data. When the cloud server or other transmission path fails or cannot be accessed, the data in the storage device can be used for backup and recovery to avoid data loss.

[0019] Other features and advantages of the present invention will be described in the following description, and in part will become apparent from the description, or will be understood by practicing the present invention. The objectives and other advantages of the present invention can be achieved and obtained by the structures particularly pointed out in the written description, claims, and drawings.

[0020] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0022] Figure 1 This is a structural diagram of a sound collection circuit in one embodiment provided in this application;

[0023] Figure 2 This is a structural diagram of a sound collection circuit in another embodiment provided by the present application;

[0024] Figure 3 A specific circuit diagram of the main control chip in the sound collection circuit in one embodiment provided in this application;

[0025] Figure 4 A specific circuit diagram of a low-pass filter module in a sound collection circuit in an embodiment provided in this application;

[0026] Figure 5 This is a specific circuit diagram of an SD card in a sound collection circuit in an embodiment provided in this application. DETAILED DESCRIPTION

[0027] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0028] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined.

[0029] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integral connection; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0030] The utility model provides a sound collection circuit, such as Figure 1 As shown, it includes a main control chip, a sound sensor module, a wireless communication module, a Bluetooth module, a storage device, a cloud server and a mobile terminal; wherein, the main control chip is connected to the Bluetooth module, the Bluetooth module is communicatively connected to the mobile terminal, the main control chip receives the control instructions sent by the mobile terminal through the Bluetooth module, and the main control chip works based on the control instructions; the output end of the sound sensor module is connected to the input end of the main control chip, and the main control chip converts the sound signal into a digital signal for output; the output end of the main control chip is connected to the wireless communication module, the wireless communication module is wirelessly connected to the cloud server, and the output end of the main control chip is also connected to the storage device, the main control chip stores the digital signal in the storage device, and sends the digital signal to the cloud server through the wireless communication module.

[0031] The sound collection circuit provided by the utility model is connected to the main control chip by a Bluetooth module by a mobile terminal, and control instructions can be sent to the main control chip to realize remote control of the sound collection circuit, so that users can control and monitor the entire process of sound collection according to needs, thereby improving the convenience and flexibility of operation; setting up a storage device and a cloud server realizes real-time transmission and backup of data, ensuring the security and integrity of the data, wherein the data stored on the cloud server can be accessed and managed at any time, realizing multi-platform interaction, providing users with a more flexible and convenient data management method, and combined with the data storage and processing capabilities of the cloud server, it can realize intelligent analysis and application of sound data, and the storage device serves as a backup medium for data to ensure the security of the data. When the cloud server or other transmission path fails or cannot be accessed, the data in the storage device can be used for backup and recovery to avoid data loss.

[0032] Further, such as Figure 2 As shown, the sound sensor module includes a plurality of sound sensors; each sound sensor is connected to an input pin of the main control chip, and on the main control chip, each input pin is connected to an output pin.

[0033] In this embodiment, each sound sensor corresponds to a different input pin of the main control chip, so that the main control chip can collect multiple sound signals at the same time. The main control chip of this application adopts a multi-channel design, so that the sound collection circuit can more comprehensively obtain sound information in the environment, thereby improving the richness and accuracy of the collected data; and each sound sensor is connected to the main control chip through a corresponding input pin, and each input pin has a corresponding output pin, which can realize parallel processing of sound signals, that is, processing multiple sound signals at the same time, improving the processing efficiency and response speed of the circuit, and is suitable for application scenarios with high real-time requirements; at the same time, each sound sensor module is relatively independent, and data transmission is realized through connection with the main control chip, thereby making the circuit highly flexible and scalable, and sound sensor modules can be added or reduced according to actual needs, thereby flexibly adjusting the collection capability and performance of the circuit.

[0034] Furthermore, the control instruction is used to control the conduction state of each input pin and each output pin on the main control chip; the mobile terminal sends the control instruction to the main control chip so that the main control chip receives the sound signal collected by one or more sound sensors in the sound sensor module.

[0035] In this embodiment, the mobile terminal can send control instructions to the main control chip to control the conduction state of each input pin and each output pin on the main control chip, so that the user can flexibly configure the working mode and parameters of the circuit according to actual needs, thereby improving the applicability and flexibility of the circuit; and through the control instructions, the user can selectively control the collection behavior of a specific sound sensor to realize customized collection and processing of sound data to meet the application requirements of different scenarios and needs; at the same time, the control instructions can also optimize the energy consumption management of the circuit by controlling the working state of the main control chip.

[0036] Specifically, the number of sound sensors can be set to 8, each sound sensor is connected to the main control chip, one sound sensor corresponds to one channel, and the mobile terminal can be a mobile phone. The mobile phone sends data based on the preset protocol through the downloaded APP. For example, the control instruction 25, 12, 1, 1 is sent in the APP, where 25 represents the channel. Converted into an 8-bit binary number, it can be understood as which channels are specifically turned on. 12 represents the recording time required to turn on the specific channel, 1 represents the switch, and another 1 represents that the data sent once is completed, thereby realizing personalized control of the circuit.

[0037] Specifically, in the above embodiment, the mobile terminal is communicatively connected to the cloud server; the mobile terminal sends a voice extraction instruction to the cloud server, the cloud server selects the target voice based on the voice extraction instruction, and sends the target voice to the mobile terminal.

[0038] In this embodiment, the mobile terminal can realize the remote voice extraction function through the communication connection with the cloud server, without being limited to a specific location or device, thereby improving the flexibility and convenience of voice extraction; the cloud server, as a central node, can undertake large-scale voice data processing tasks, and can select and process the target voice from massive voice data according to the voice extraction instructions, greatly improving the efficiency and speed of voice data processing; and the cloud server can send the selected target voice to the mobile terminal in a timely manner to realize real-time feedback, so that the user can obtain the results in real time during the voice extraction process, and perform subsequent processing or operations in a timely manner, thereby improving the real-time performance of the system and user experience.

[0039] Specifically, in the above embodiment, an analog-to-digital converter and a signal processing unit are provided in the main control chip; the input end of the analog-to-digital converter is connected to the output module of the sound sensor, for receiving the sound signal collected by the sound sensor and converting the sound signal into a digital signal; the output end of the analog-to-digital converter is connected to the input end of the signal processing unit, and the output end of the signal processing unit is respectively connected to the wireless communication module and the storage device, and the signal processing unit is used to process the digital signal, store it in the storage device, and send the digital signal to the cloud server through the wireless communication module.

[0040] In this embodiment, through the combination of the analog-to-digital converter and the signal processing unit, the sound signal can be efficiently converted into a digital signal and processed, thereby improving the processing efficiency and accuracy of the sound data, and enabling the circuit to better cope with the sound signals in different scenarios; the internal integration of the analog-to-digital converter and the signal processing unit, as well as the connection with the wireless communication module and the storage device, makes the structure of the entire circuit more compact and optimized, reduces the cost of the system, and improves the stability and reliability of the system.

[0041] Specifically, the circuit provided by the present application can also be used in the electronic medical industry, for example, to collect the heart and lung sounds of doctors and patients. First, the sound sensor module is used to collect the sound signals of doctors and patients. At this time, the sound signals have not been filtered by hardware, and their frequency range is about 0-600KHZ, including 20-600HZ heart sound signals, 60-1000HZ lung sound signals and about 3000HZ voice signals. Then, the sound signals are converted into digital signals through the analog-to-digital converter in the main control chip, and the digital filtering function in the signal processing unit is used to separate the heart and lung sounds and voice signals, and the processed data is packaged into wav audio format and stored in storage devices or sent to cloud servers. The main control chip structure is as follows: Figure 3 As shown, the STM32F103C8T6 chip can be used.

[0042] Specifically, in the above embodiment, Figure 2As shown, the sound collection circuit also includes a low-pass filter module; the input end of the low-pass filter module is connected to the output end of the sound sensor module, and the output end of the low-pass filter module is connected to the input end of the main control chip.

[0043] In this embodiment, the specific structure of the low-pass filter module is as follows: Figure 4 As shown, they are respectively connected between the sound sensor module and the main control chip, and are specifically composed of filter capacitors and resistors, and one sound sensor is correspondingly connected to a low-pass filter module; the low-pass filter module can filter out the high-frequency components in the sound signal, making the sound signal smoother and more stable, helping to reduce the impact of noise in the environment on the acquisition of sound signals, and improving the clarity and quality of the sound signal; the low-pass filter module can also extract the main components in the sound signal, filter out unnecessary information such as high-frequency noise, so that the main control chip is more focused and effective when processing the sound signal, which helps to improve the performance and stability of the circuit; the low-pass filter module can also pre-process the signal before the signal is input to the main control chip, filter out unnecessary high-frequency components, reduce the processing burden of the main control chip, help to improve the operating efficiency of the main control chip, extend its service life, and reduce power consumption.

[0044] Specifically, in the above embodiment, Figure 2 As shown, the storage device includes an SD card slot and an SD card; the SD card slot is connected to the main control chip, and the SD card is movably installed in the SD card slot.

[0045] In this embodiment, the storage device is specifically selected from SD cards. SD cards generally have a large storage space and can store a large amount of data, meeting the system's needs for data storage. SD cards also have good portability, making it easy to transfer data stored in the SD card to other devices or back it up, allowing users to more conveniently process and manage data. SD cards have fast read and write speeds, allowing for rapid data read and write operations, helping to improve the system's response speed and processing efficiency, making data storage and access faster and more efficient. Specifically, the circuit diagram of the SD card is shown in FIG. Figure 5 shown.

[0046] Specifically, in the above embodiment, the sound collection circuit further includes a crystal oscillator reset module; the crystal oscillator reset module is connected to the main control chip.

[0047] In this embodiment, setting up a crystal oscillator reset module can ensure that the main control chip can be correctly initialized during the startup process and maintain a stable clock signal, preventing the circuit from failing to start or working unstably, thereby improving the stability and reliability of the entire sound collection circuit; when the main control chip restarts abnormally, the crystal oscillator reset module can ensure that important data or status information is not lost when the system restarts, thereby protecting the integrity of the data, helping to avoid data damage or loss, and ensuring the security of important data in the circuit; the existence of the crystal oscillator reset module can reduce the repair and maintenance costs caused by software and hardware failures, effectively reduce manual intervention and maintenance workload, and reduce the maintenance cost and operating cost of the circuit.

[0048] Specifically, in the above embodiment, the sound collection circuit further includes a key module; the key module is connected to the main control chip.

[0049] In this embodiment, the key module can be used to realize the interactive operation between the user and the sound collection circuit. The user can start, stop or adjust the sound collection function by pressing the button, thereby enhancing the user's control and operation experience of the circuit; the key module can also be used to realize the functional expansion of the sound collection circuit. By designing different key functions, various functions such as recording mode switching, volume adjustment, and playback control can be realized, thereby improving the flexibility and practicality of the circuit; and, through the key module, the user can directly operate on the sound collection circuit without relying on external equipment or complicated operation steps, thereby improving the user's operation convenience; the key module can also provide a feedback mechanism for button pressing, such as sound prompts or light indications, to help the user confirm whether the button operation is successful. This feedback mechanism helps to improve the user's perception and understanding of the circuit status and reduce the occurrence of misoperation.

[0050] Specifically, in the above embodiment, the sound collection circuit also includes a power supply module; the power supply module includes an LDO voltage regulator unit, which is used to receive a DC input voltage of 3.3V-15V and convert it into a DC output voltage of 3.3V to power the sound collection circuit.

[0051] In this embodiment, the LDO voltage regulator unit can convert the input 3.3V-15V DC voltage into a stable 3.3V DC output voltage, providing a stable and reliable power supply for the sound collection circuit, helping to ensure that the sound collection circuit is not affected by power supply fluctuations or interference during operation, thereby ensuring the stability and reliability of the circuit; the power supply module can provide appropriate voltage and current to the sound collection circuit, and at the same time achieve stable voltage output through the LDO voltage regulator unit, effectively preventing damage to circuit components caused by excessively high or low voltage, thereby extending the service life of the sound collection circuit and reducing damage and maintenance costs caused by power supply problems; and by providing a stable power supply, the sound collection circuit can achieve more stable and accurate sound collection, thereby improving the quality and accuracy of sound collection.

[0052] Specifically, the sound collection circuit provided in this application is also provided with a debugging reserved interface, which provides a convenient interface and tools for debugging and testing the sound collection circuit, so that users can connect the debugging equipment through these interfaces to perform real-time monitoring, data collection and fault diagnosis, thereby speeding up the debugging process and improving debugging efficiency.

[0053] Obviously, those skilled in the art may make various modifications and variations to the present invention without departing from the spirit and scope of the present invention. Thus, if such modifications and variations fall within the scope of the claims of the present invention and their equivalents, the present invention is intended to include such modifications and variations.

Claims

1. A sound collection circuit, characterized in that: Including main control chip, sound sensor module, wireless communication module, Bluetooth module, storage device, cloud server and mobile terminal; The main control chip is connected to the Bluetooth module, the Bluetooth module is in communication with the mobile terminal, the main control chip receives control instructions sent by the mobile terminal through the Bluetooth module, and the main control chip operates based on the control instructions; The output end of the sound sensor module is connected to the input end of the main control chip, and the main control chip converts the sound signal collected by the sound sensor module into a digital signal for output; The output end of the main control chip is connected to the wireless communication module, and the wireless communication module is wirelessly connected to the cloud server. The output end of the main control chip is also connected to the storage device. The main control chip stores the digital signal in the storage device and sends the digital signal to the cloud server through the wireless communication module.

2. The sound collection circuit according to claim 1, characterized in that: The sound sensor module includes a plurality of sound sensors; Each of the sound sensors is connected to an input pin of the main control chip, and each of the input pins is connected to an output pin on the main control chip.

3. The sound collection circuit according to claim 2, characterized in that: The control instruction is used to control the conduction state of each input pin and each output pin on the main control chip; The mobile terminal sends the control instruction to the main control chip, so that the main control chip receives the sound signal collected by one or more sound sensors in the sound sensor module.

4. The sound collection circuit according to claim 1, characterized in that: The mobile terminal is communicatively connected with the cloud server; The mobile terminal sends a voice extraction instruction to the cloud server, and the cloud server selects a target voice based on the voice extraction instruction and sends the target voice to the mobile terminal.

5. The sound collection circuit according to claim 1, characterized in that: The main control chip is provided with an analog-to-digital converter and a signal processing unit; The input end of the analog-to-digital converter is connected to the output module of the sound sensor, and is used to receive the sound signal collected by the sound sensor and convert the sound signal into the digital signal; The output end of the analog-to-digital converter is connected to the input end of the signal processing unit, and the output end of the signal processing unit is respectively connected to the wireless communication module and the storage device. The signal processing unit is used to process the digital signal, store it in the storage device, and send the digital signal to the cloud server through the wireless communication module.

6. The sound collection circuit according to claim 1, characterized in that: The sound collection circuit also includes a low-pass filtering module; The input end of the low-pass filter module is connected to the output end of the sound sensor module, and the output end of the low-pass filter module is connected to the input end of the main control chip.

7. The sound collection circuit according to claim 1, characterized in that: The storage device includes an SD card slot and an SD card; The SD card slot is connected to the main control chip, and the SD card is movably installed in the SD card slot.

8. The sound collection circuit according to claim 1, characterized in that: The sound collection circuit also includes a crystal oscillator reset module; The crystal oscillator reset module is connected to the main control chip.

9. The sound collection circuit according to claim 1, characterized in that: The sound collection circuit also includes a key module; The button module is connected to the main control chip.

10. The sound collection circuit according to claim 1, characterized in that: The sound collection circuit also includes a power supply module; The power supply module includes an LDO voltage stabilizing unit, which is used to receive a DC input voltage of 3.3V-15V and convert it into a DC output voltage of 3.3V to power the sound collection circuit.

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