Education learning system with low power consumption

Abstract

The utility model discloses a low-power-consumption educational learning system, which comprises a main control module, a voice recognition module, a microphone, a power amplifier module, a loudspeaker, a screen display module, a storage module, a key module, a power management module, a battery and a main toggle switch, the battery is respectively connected with the main control module and the main toggle switch, and the main toggle switch is respectively connected with the main control module and the voice recognition module; the power management module is connected with the main toggle switch, and the key module is connected with the main control module; the main control module is further connected with the screen display module and the storage module, and the storage module is further connected with the screen display module. The main control module is also connected with the voice recognition module, and the voice recognition module is connected with the microphone; the voice recognition module is further connected with the power amplifier module, and the power amplifier module is further connected with the loudspeaker. According to the utility model, the low-power-consumption processor and the memory chip are adopted, so that the energy consumption of the product in a working state is reduced, and the use requirements of diversified preschool education are met.

Description

Technical Field

[0001] The utility model relates to the technical field of educational products, in particular to a low-power educational learning system. Background Art

[0002] With the continuous improvement of parents' and education experts' understanding of the importance of early education, early childhood education toys, as important auxiliary tools for children's development, have received more and more attention and recognition. Many parents begin to look for toys that can stimulate children's creativity, imagination and hands-on ability to meet the all-round development needs of children. Regarding the traditional early childhood education toy products on the market at present, there are still the following problems:

[0003] 1) The educational function is too single. Although educational elements are incorporated, the educational function of some toys is too single to meet the diverse needs of children. Especially for children aged 2-6 with difficulty in concentrating for a long time, such products cannot attract children's attention and stimulate their interest in learning, restricting children's learning experience and interest.

[0004] 2) Insufficient educational nature. The educational content of traditional early education toys is often relatively fixed and limited. They usually can only provide one or several specific educational functions. For example, puzzles can exercise spatial cognitive ability, but cannot provide diverse educational content. This may cause children to be difficult to obtain comprehensive knowledge and skills during the play process. Some other electronic early childhood education toys overly emphasize entertainment and interactivity while ignoring the importance of education, resulting in children being difficult to obtain effective knowledge and skills during the play process, going against the original intention of parents' purchase.

[0005] 3) Slow update and iteration speed. Due to the relatively complex design and manufacturing process, current early childhood education toys often have difficulty keeping up with the development of the times and the changes in children's needs, and it is difficult to achieve real-time updates.

[0006] 4) Network dependence. Some early childhood education products must be connected to the network to achieve voice recognition and interaction, increasing the additional cost of the products. The corresponding operation process of configuring the network requires parents to configure according to the instruction manual, increasing the burden on parents. At the same time, due to the different local area networks used, the network configuration often fails, increasing the return rate of the products.

[0007] 5) Energy consumption problem. Currently, the early childhood education toys for the 2-6-year-old age group on the market are basically button batteries. And for the convenience of children's use, the products are set to have the battery always on during product design, resulting in too fast power consumption of the products, increasing the user cost and energy consumption. Summary of the Utility Model

[0008] The purpose of the utility model is to provide a low-power educational learning system to meet the use needs of diverse early childhood education.

[0009] To achieve the above object, the following technical solutions are adopted:

[0010] A low-power education and learning system includes a main control module, a voice recognition module, a microphone, a power amplifier module, a speaker, a display module, a storage module, a key module, a power management module, a battery, and a main toggle switch; the battery is respectively connected to the main control module and the main toggle switch, and the main toggle switch is respectively connected to the main control module and the voice recognition module; the power management module is connected to the main toggle switch, and the key module is connected to the main control module; the main control module is also respectively connected to the display module and the storage module, and the storage module is also connected to the display module; the main control module is also connected to the voice recognition module, and the voice recognition module is connected to the microphone; the voice recognition module is also connected to the power amplifier module, and the power amplifier module is also connected to the speaker.

[0011] Further, the main control module includes a main control chip, and an analog-to-digital converter, a timer, and a temperature sensor are integrated on the main control chip; the chip model of the main control chip is PY32F030, and the main control chip is connected to the storage module through an SPI communication interface, and reads the information pre-stored in the storage module through the 9th, 10th, 11th, 12th, 13th, and 14th pins.

[0012] Further, the main control chip is connected to the display module through the 6th, 2nd, 30th, 29th, 5th, and 3rd pins; the 3rd pin is used to send a control signal to the display module to control the operation of the display module; the 6th pin is used to select or activate the display module for data transmission; the 2nd pin is used to synchronize the data transmission information between the display module and the main control module; the 30th pin is used to send display data or commands to the display module; the 29th pin is used to indicate whether the data currently received by the display module is a command or display data; the 5th pin is used to reset the display module.

[0013] Further, the main control chip is connected to the voice recognition module through the 7th and 8th pins, and the main control chip is connected to the key module through the 28th, 27th, 26th, and 32nd pins; the 37th and 34th pins of the main control chip are used as a serial debugging interface for debugging and burning; the 20th and 22nd pins of the main control chip are used to control the charging process of the main control module, and the 15th pin of the main control chip is used to monitor the voltage of the battery; the 17th pin of the main control chip is used to monitor the battery power status, and the 18th pin of the main control chip is used to control the charging temperature of the system.

[0014] Further, the chip model of the storage module is P25D440SH.

[0015] Furthermore, the power management module includes a charging unit and a power supply unit; the chip model used by the charging unit is AK4056H; the power supply unit includes a voltage stabilizing unit and a voltage dividing unit; the chip model used by the voltage stabilizing unit is LN1132, which is used to provide a standard 3.3V voltage to the main control module; the voltage dividing unit is provided with a LOW pin, which is reversely controlled by the main control module.

[0016] Furthermore, the chip model used by the voice recognition module is C1122.

[0017] Furthermore, the chip model used by the power amplifier module is FM8002.

[0018] Adopting the above solution, the beneficial effects of the present utility model are as follows:

[0019] 1) Solve the problem that the education function of existing products is too single. The present utility model provides rich learning content through multi-functional integration; the toy is built-in with an intelligent chip and a microphone, which can recognize children's voice commands, so as to provide a personalized learning interaction experience; at the same time, in order to increase the fun and interactivity of learning, in addition to setting up multiple learning sections, the corresponding sections are also equipped with functions such as music, stories and animations, which stimulate children's learning interest and enthusiasm.

[0020] 2) The present utility model provides a more comprehensive and educational learning platform for children. This design not only pays attention to children's experience, but also focuses on stimulating children's curiosity, exploration desire and learning ability through interesting animations and music. At the same time, it is built-in with rich educational resources, and through various forms such as multimedia display and interactive Q&A, knowledge is integrated into play, which is more in line with the nature of children in this age group.

[0021] 3) The present utility model supports power-on upgrade, so that the present utility model can continuously maintain an updated state to adapt to the changing educational needs and children's growth needs. When a new software version or educational content of the product is updated, the user only needs to simply connect the product to the power supply and start the upgrade program to easily complete the upgrade. At the same time, it also provides convenience for the maintenance and repair of the product. When the product has a fault or problem, by upgrading the software, known vulnerabilities and errors can be repaired, improving the stability and reliability of the product. This not only extends the service life of the product, but also improves the user's satisfaction and trust.

[0022] 4) The utility model supports offline voice packs and has pre-recorded voice commands and responses built-in. Therefore, it can achieve voice communication without relying on an external network connection. This not only eliminates the steps of networking and potential network security risks but also ensures the immediacy and stability of voice interaction. Considering the poor network signals in outdoor or remote areas, the advantage of the utility model not requiring networking is manifested, broadening the product's usage scenarios.

[0023] 5) The utility model adopts a Type-C charging interface, enabling the product to quickly restore power, providing a convenient charging method for users, and also avoiding the safety issue of children accidentally swallowing traditional button batteries. The utility model also has a main toggle switch. When the product is not used by children or parents for a certain period of time, the main toggle switch will automatically turn off, cutting off the power supply of the entire circuit. This design not only avoids unnecessary energy consumption but also extends the product's service life.

[0024] 6) In the circuit design of the utility model, independent circuit switches are specifically set for the voice recognition module and the screen display module. By independently controlling the circuit switches of these two modules, more refined energy management is achieved, effectively reducing the overall energy consumption of the product, achieving the goal of saving electricity and energy. Moreover, low-power processors and memory chips are used to reduce the energy consumption of the product during operation. At the same time, power management is optimized to automatically adjust the power consumption state of the product according to the usage situation and environment, not only reducing the product's usage cost but also meeting the requirements of modern society for environmental protection and sustainable development. Description of the Drawings

[0025] Figure 1 is the principle block diagram of the utility model;

[0026] Figure 2 is the circuit diagram of the main control module of the utility model;

[0027] Figure 3 is the circuit diagram of the storage module of the utility model;

[0028] Figure 4 is the circuit diagram of the screen display module of the utility model;

[0029] Figure 5 is the circuit diagram of the power management module of the utility model;

[0030] Figure 6 is the circuit diagram of the voice recognition module of the utility model;

[0031] Figure 7 is the circuit diagram of the speaker of the utility model;

[0032] Figure 8 is the circuit diagram of the microphone of the utility model;

[0033] Figure 9 This is the circuit diagram of the button module of the present utility model. Specific embodiments

[0034] The present utility model will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0035] Referring to Figures 1 to 9 As shown, the present utility model provides a low-power education and learning system. In one embodiment, it includes a main control module, a voice recognition module, a microphone, a power amplifier module, a speaker, a display module, a storage module, a button module, a power management module, a battery, and a main toggle switch; the battery is respectively connected to the main control module and the main toggle switch, and the main toggle switch is respectively connected to the main control module and the voice recognition module; the power management module is connected to the main toggle switch, and the button module is connected to the main control module; the main control module is also respectively connected to the display module and the storage module, and the storage module is also connected to the display module; the main control module is also connected to the voice recognition module, and the voice recognition module is connected to the microphone; the voice recognition module is also connected to the power amplifier module, and the power amplifier module is also connected to the speaker.

[0036] Continuing to refer to Figure 2 As shown, the main control module includes a main control chip, and an analog-to-digital converter, a timer, and a temperature sensor are integrated on the main control chip; the chip model of the main control chip is PY32F030; the main control chip is responsible for the main judgment and control of the logic of this utility model, and has the characteristics of high performance, low power consumption, high reliability, etc., and also has a strong data processing ability and flexible programming ability.

[0037] The chip model of the storage module is P25D40SH, which contains rich educational pictures, animations and other instructions, and requires battery power supply to form a closed-loop circuit to trigger the display module to display the corresponding theme; the chip model of the voice recognition module is C1122, which is connected to the main control chip through serial port pins, and is responsible for processing the voice signals sent by the main control chip, and cooperating with the FM8001 power amplifier module (the chip model of the power amplifier module is FM8002) and the speaker for audio output; at the same time, the microphone converts the obtained voice instructions into digital signals through ADC processing and transmits them to the voice recognition module, and then transmits the recognition results to the main control module to perform corresponding operations, simplifying the usage process for children.

[0038] The power management module is responsible for powering the entire system, mainly including charging management, preventing overcharging, power-on upgrading, etc.; at the same time, it realizes a stable output of 3.3V through a voltage regulator chip to power the display module and the storage module, and also adds a JXP2305VRG diode to control the working state of the voice recognition module to reduce battery power consumption during children's use; the button module consists of four buttons. Children transmit command signals to the main control chip for judgment and processing through simple button operations, which are responsible for functions such as system menu switching and page turning.

[0039] In one embodiment, the main control chip is connected to the storage module through the SPI communication interface, and reads the information pre-stored in the storage module through pins 9, 10, 11, 12, 13, and 14. At the same time, the main control chip is connected to the display module through pins 6, 2, 30, 29, 5, and 3; pin 3 is used to send a control signal to the display module to control the operation of the display module; pin 6 is used to select or activate the display module for data transmission; pin 2 is used to synchronize the data transmission information between the display module and the main control module; pin 30 is used to send display data or commands to the display module; pin 29 is used to indicate whether the data currently received by the display module is a command or display data; pin 5 is used to reset the display module.

[0040] In addition, the main control chip is connected to the voice recognition module through pins 7 and 8, and the main control chip is connected to the button module through pins 28, 27, 26, and 32; pins 37 and 34 of the main control chip are used as a serial debugging interface for debugging and burning; pins 20 and 22 of the main control chip are used to control the charging process of the main control module, and pin 15 of the main control chip is used to monitor the battery voltage; pin 17 of the main control chip is used to monitor the battery power status, and pin 18 of the main control chip is used to control the charging temperature of the system.

[0041] In this embodiment, the main control chip uses the chip model PY32F030 with a QFN32 package, which provides a variety of peripheral interfaces such as USART, SPI, I2C, etc., facilitating communication with the chip C1122 of the voice recognition module of this system. At the same time, it also integrates functions such as a high-precision ADC (analog-to-digital converter) and a timer, making data acquisition and control more accurate and reliable; in addition, a temperature sensor is integrated inside the chip, which can be used for system temperature monitoring and overheat protection, enhancing the stability and reliability of the system. The VCC part of the main control chip requires 3.3V power supply (pin 1), which is provided by the LN1132 voltage regulator chip of the system power module.

[0042] The main control chip is connected to the P25D440SH through an SPI communication interface and uses pins 9 - 14 (CS, HOLDE, SCLK, SO, SI, WP) to read the program code stored in the storage module to perform corresponding operations. It will also write the data or configuration information used by children into the storage module for storage, simplifying the usage process for children.

[0043] There are five signal lines connecting the main control module and the screen display module, and a control signal is sent through the 3V3_EN enable pin (pin 3) to turn on the circuit of the screen display module accordingly, enabling the circuit to conduct as needed and reducing power consumption. Through the collaborative work of six signal lines, it is ensured that the main control module can correctly send commands and data to the screen display module (LCD) and control the display of the LCD to achieve personalized theme display. Specifically, refer to Figures 2 to 4 as shown:

[0044] LCD_CS (pin 6): Chip select signal interface, used to select or activate the LCD for data transmission. When LCD_CS is activated (usually low level), the LCD will respond to the data or commands sent by the main control module.

[0045] LCD_SCK (pin 2): Serial clock signal interface, used to synchronize data transmission between the LCD and the main control module. When the LCD receives the clock signal, it will read or write data according to the specified timing sequence.

[0046] LCD_SDA (pin 30): Serial data interface, which is the main channel for the main control module to send data or commands to the LCD. The data is transmitted through the LCD_SDA interface synchronized with the clock signal of LCD_SCK.

[0047] LCD_RS (pin 29): Register selection interface, which is used to indicate whether the data currently received by the LCD is a command or display data. When LCD_RS is at a high level, it indicates that a command is being transmitted; when it is at a low level, it indicates that display data is being transmitted.

[0048] LCD_RST (pin 5): Reset signal interface. When the MCU sends a reset signal to LCD_RST, the LCD will perform a reset operation, which usually occurs during power-on initialization or system reset to ensure that the LCD display is in a known and correct initial state.

[0049] The VBAT_EN (pin 21) of the PY32F030 chip in the main control module controls the JXP2305VRG battery voltage to provide the required 1.2V and 3.3V voltages for the voice recognition module; the C1122 voice chip of the voice recognition module is connected to the main control module through two serial communication interfaces, UART_TX (pin 7) and UART_RX (pin 8), for sending and receiving data between the voice chip and the main control module; when the main control module needs to send data to the voice chip, it sends the data to the voice chip through the UART_TX pin. On the contrary, when the voice chip receives data or needs to send data to the main control module, it sends the data to the main control module through the UART_RX pin, realizing two-way communication between the main control module and the voice chip, enabling children to have intelligent conversations when using this system, simplifying the operation steps, increasing the age range of the target audience, and enhancing the competitiveness of the product.

[0050] Children can control the main control module by pressing buttons KEY1 (pin 28), KEY2 (pin 27), KEY3 (pin 26), and KEY4 (pin 32), receive and process the signals sent by the KEYs in real time, and execute corresponding control instructions for children to achieve operations such as page switching and playing.

[0051] The PY32F030 chip of the main control module has two serial debugging interfaces, SWCLK (pin 37) and SWDIO (pin 34), for low-cost and low-power consumption debugging and programming of this system, and sets two debugging print program pins, TX (pin 19) and TX2, for data sending in serial communication, facilitating software debugging.

[0052] The PY32F030 chip of the main control module constitutes the power management part through CHR_OK, CHR_ON, AD_BAT, LOW, and TDC. These pins each perform different functions and jointly ensure that the power system of this system can work safely and efficiently. Specifically:

[0053] CHR_OK (pin 22) and CHR_ON (pin 20): These two pins are related to the charging function of this system. When the system is connected to a charger and starts charging, the CHR_ON pin will be activated to notify the main control module that it is currently charging; when the charging is completed, the CHR_OK pin will be activated, indicating that the charging process has been successfully completed. The main control module can control the charging process according to the states of these two pins and give corresponding prompts after the charging is completed, such as disconnecting the charging circuit or displaying a charging completion prompt.

[0054] AD_BAT (Pin 15): Used to monitor the battery voltage. By reading the analog signal of the AD_BAT pin, the main control module can know the remaining battery power in real time. According to the battery power situation, the main control module can adjust the working state of this practical system. For example, when the power is low, it can reduce the output power or remind the user to charge in time.

[0055] LOW (Pin 17): When the battery power is too low, the LOW pin will be activated. By detecting the status of this pin, the main control module can determine whether the battery power is too low and take corresponding measures, such as turning off or displaying a low power reminder to avoid sudden stop due to power exhaustion.

[0056] TDC (Pin 18): Through this pin, the main control module can control the charging temperature of this system to ensure stable output of appropriate power.

[0057] Through the coordinated work of these pins, the power management part of this system can realize functions such as temperature monitoring, charging control, and battery power monitoring, ensuring the safe and stable operation of this system.

[0058] In one embodiment, the chip model adopted by the storage module is P25D440SH.

[0059] In this embodiment, the storage module uses a P25D440SH chip with a package information of SOP8 as the FLASH chip of this system. The storage capacity is 4M * 1bit, and it can store various theme files, including images, color schemes, and user interface layouts, etc., to meet the needs of children for animations, etc. during use.

[0060] Refer to Figure 3 As shown, the 3V3A pin in the figure is connected to the screen display module. When the main control module allows the screen display module to read data or commands, a closed-loop circuit is formed to trigger the FLASH chip to work, retrieve and display the information content of the FLASH chip. Incorporating the design of the FLASH chip can not only reduce the storage burden of the main control module but also improve the information reading speed, making the display of this system more smooth and rapid. Specifically:

[0061] flash_cs: Chip select signal. When activated by PY32F030, it indicates that the main control module (hereinafter referred to as MCU) is currently communicating with the Flash, ensuring that the MCU can accurately interact with the Flash.

[0062] flash_si: Serial input signal, used to write data to the flash. The MCU can write new code, data, or firmware to the Flash memory through this pin to update or expand its functions.

[0063] flash_so: Serial output signal. When the MCU sends corresponding commands or addresses to P25D440SH to read data, it will serially transmit the data to the MCU through this pin, which is the key channel for data transmission between P25D440SH and the MCU.

[0064] flash_wp: Write protection signal, used to prevent accidental write operations to the flash. When the flash_wp signal is activated, writing to the flash is usually prohibited to prevent data loss or damage. The MCU can ensure the security of the Flash by monitoring and controlling this signal.

[0065] flash_holde: Hold signal, used to pause data transmission between the flash and the main control chip. When the flash_holde signal is activated, the flash will pause its operation until the signal is released. The MCU can precisely control the timing and process of data transmission through this pin.

[0066] flash_sclk: Serial clock signal, used to synchronize data transmission between the flash and the MCU. This signal defines the rate and timing of data transmission, ensuring that both parties can communicate at the same pace, improving the stability and reliability of data transmission.

[0067] These pins work together to ensure that the main control chip of this system can correctly communicate with the flash to achieve data reading, writing, and storage.

[0068] At the same time, for the screen display module, as shown in Figure 4 The JXP2301VRG MOS transistor used in this system plays a crucial role in the communication between the screen display module (hereinafter referred to as LCD) and the MCU. When the MCU transmits data or commands to the LCD screen, it will send a control signal through the 3V3_EN enable pin, and one of the key signals is the E signal. When the MCU needs to send data to the LCD, it will set the E signal to high level. Once the E signal becomes high level, the JXP2301VRG MOS transistor will receive this signal and correspondingly turn on the circuit. The switching characteristic of the MOS transistor enables the circuit to conduct as needed, providing the required power or signal for the LCD screen.

[0069] In this state, the LCD_CS signal is activated. The LCD_RS determines whether the received data is data or a command and starts processing the information received from the SCK (Serial Clock) and SDA (Serial Data) interfaces. SCK and SDA are interfaces commonly used in serial communication, responsible for transmitting the clock signal and data respectively. Through these two interfaces, the MCU can orderly send data and control commands to the LCD screen. The LCD screen can read data from the SDA interface according to the rhythm of the clock signal and work in coordination with the FLASH chip to complete the update of the display content or respond to corresponding operations. The LCD_RST represents the screen reset signal, which is used to reset the LCD screen to the initial state to ensure correct operation during startup or reconfiguration.

[0070] In addition, for the power supply part, the power management module includes a charging unit and a power supply unit. The chip model used for the charging unit is AK4056H. The power supply unit includes a voltage stabilization unit and a voltage division unit. The chip model used for the voltage stabilization unit is LN1132, which is used to provide a standard 3.3V voltage to the main control module. The voltage division unit is provided with a LOW pin, which is reversely controlled by the main control module.

[0071] Refer to Figure 5 As shown, the power supply part includes two parts, namely the charging part and the power supply part.

[0072] The charging part conducts charging management through the charging chip AK4056H, manages the charging process, including function points such as the magnitude of the charging current, charging voltage, and charging indication. AK4056H is a 1A single-cell lithium-ion battery linear charger with an input withstand voltage of up to 28V and a power OVP function. It adopts a constant current and constant voltage charging mode and charges through a Type-C interface.

[0073] In this system, a total toggle switch part is added to facilitate the user's power management of the system and save power loss. The power supply part includes a voltage stabilization part and a voltage division part. Specifically:

[0074] Voltage stabilization part (LDO): It is used to provide a standard 3.3V for the main control chip PY32F030. The 3.3V voltage stabilization is achieved by using the LN1132 chip;

[0075] Voltage division section (BAT_CHR): The power supply passes through the R32 resistor to reduce the relatively high voltage to a range that the MCU can safely receive, and then transmits the battery voltage status to the MCU through AD_BAT. Thus, while protecting the MCU, the MCU can also control and display the battery voltage status. To save power during this voltage division process, a LOW pin is also set, which is controlled reversely by the MCU. When the MCU pin needs to detect the battery voltage status, the battery voltage is raised to the voltage required by AD_BAT to form a closed-loop circuit. Otherwise, a closed-loop cannot be formed and the detection status is turned off.

[0076] Meanwhile, for the voice recognition module, as Figure 6 shown, the C1122 voice chip is adopted, which integrates a high-performance and low-power Audio Codec module and a hardware audio processing module, ensuring high-quality audio input and output. The low-power design enables the system to maintain low energy consumption while maintaining high performance, thus extending the usage time.

[0077] Through Figure 6 it can be seen that the VBAT_EN enable pin of PY32F030 controls the JXP2305VRG MOS transistor to turn on the battery power supply. Through two regulators, XT3412 and LN1154L, battery voltages of 1.2V and 3.3V are provided for the voice chip C1122 respectively.

[0078] When the MCU needs to send data to the voice chip, it first writes the data into its UART_TX register. Then, the UART controller retrieves the data from the register and sends it bit by bit through the UART_TX pin. After the UART1_RX (pins 22, 27) of the voice chip receives this data, it stores it in the internal receive buffer. Similarly, when the voice chip needs to send data to the MCU, it first writes the data into its UART1_TX register. Then, the UART controller retrieves the data from the register and sends it bit by bit through the UART1_TX (pins 23, 28) pin. After the UART_RX pin of the MCU receives this data, it stores it in the internal receive buffer.

[0079] After receiving the instruction from the MCU chip, the C1122 voice chip sends audio data or control commands to the FM8002 speaker for playback through GPIO26 (pin 47), and HPOUT_L (pin 43) amplifies or plays the audio information. Among them, C1122 controls the opening and closing of the SS8050 MOS transistor through VDD_3V3 (pin 44) to make the voice speaker part work, reducing power consumption.

[0080] MICP_L (Pin 38) and MICN_L (Pin 37) transmit the captured voice information to the C1122 chip for processing. The four pins of MICBIAS (Pin 39), VCMDAC (Pin 46), VCMADC (Pin 45), and VDD_3V3 (Pin 41) reduce the radio wave interference suffered by the audio in the circuit, ensuring that the product can recognize voice commands over a larger area and more accurately.

[0081] In addition, for the speaker, as Figure 7 shown, the FM8002 audio power amplifier IC is adopted. The application circuit is simple, without the need for external coupling capacitors or bootstrap capacitors. It uses an SOP-8 package, saving circuit area. Through the "switching / switching noise" suppression technology, the noise generated during power-on and power-off is eliminated. Specifically:

[0082] GPIO26 (Pin 1): General-purpose input / output port, which can transmit audio data and control commands. The C1122 can send audio data to the FM8002 speaker through this pin for playback, or send control commands to adjust parameters such as volume and sound effects. At the same time, the GPIO26 pin can also send the status information or feedback signals of the speaker to the voice chip, such as playback status and error prompts.

[0083] HPOUT_L (Pin 4): Audio output pin. The HPOUT_L pin transmits the left-channel audio signal processed by the C1122 to the corresponding part of the speaker for amplification and playback, providing high-quality audio signals to ensure the clarity and fidelity of the audio.

[0084] For the microphone, as Figure 8 shown, when children use it, the short commands they give are transmitted to the voice chip through the microphone, and then corresponding operations are taken on the MCU control to display the corresponding interface or voice. The captured sound signals (such as human voices, musical instrument sounds, etc.) are transmitted to the C1122 through the MICP_L and MICN_L interfaces. The voice chip can perform operations such as sampling, quantization, and encoding on these signals to achieve functions such as voice recognition, voice control, and audio recording. During this process, MICBIAS (bias power supply) ensures that the microphone circuit operates under a stable power supply, avoiding audio distortion or noise caused by power fluctuations. VCMADC (voice coil motor analog-to-digital converter) is mainly responsible for the acquisition and analog-to-digital conversion of audio signals, providing high-quality digital audio signals for the voice chip. VCMDAC is responsible for converting the digital audio signals output by the voice chip into analog signals for audio output control or other audio processing functions. The VCMADC, VCMDAC, MICBIAS, and VDD_3V3 grounding circuits in the schematic diagram are all filter circuits used to eliminate interference signals and noise and improve signal quality.

[0085] For the button module, such as Figure 9 As shown, for the two pins of the button, one is the signal pin connected to the MCU, and the other is the ground pin connected to the common ground of the circuit. When the button is pressed, a path is formed between the signal pin and the ground, generating an electrical signal. The MCU continuously monitors the status of the button. Once it detects the change in the electrical signal generated by the button being pressed, the MCU immediately recognizes this operation and executes the corresponding function according to the preset program. Four buttons are set in this system, corresponding to the functions of switching, playing, previous page, and next page. Children can simply operate and control this system by pressing the buttons. Double-clicking the previous page or next page can control the volume size.

[0086] The above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A low-power education and learning system, characterized in that: It includes a main control module, a voice recognition module, a microphone, a power amplifier module, a speaker, a screen display module, a storage module, a key module, a power management module, a battery, and a main toggle switch; the battery is respectively connected to the main control module and the main toggle switch, and the main toggle switch is respectively connected to the main control module and the voice recognition module; the power management module is connected to the main toggle switch, and the key module is connected to the main control module; the main control module is also respectively connected to the screen display module and the storage module, and the storage module is also connected to the screen display module; the main control module is also connected to the voice recognition module, and the voice recognition module is connected to the microphone; the voice recognition module is also connected to the power amplifier module, and the power amplifier module is also connected to the speaker.

2. The low-power education and learning system according to claim 1, characterized in that: The main control module includes a main control chip, and the main control chip is integrated with an analog-to-digital converter, a timer and a temperature sensor; the chip model used by the main control chip is PY32F030, the main control chip is connected to the storage module through an SPI communication interface, and reads information pre-stored in the storage module through pins 9, 10, 11, 12, 13 and 14.

3. The low-power education and learning system according to claim 2, characterized in that: The main control chip is connected to the screen display module via pin 6, pin 2, pin 30, pin 29, pin 5 and pin 3; the pin 3 is used to send a control signal to the screen display module to control the operation of the screen display module; the pin 6 is used to select or activate the screen display module for data transmission; the pin 2 is used to synchronize the data transmission information between the screen display module and the main control module; the pin 30 is used to send display data or commands to the screen display module; the pin 29 is used to indicate whether the data currently received by the screen display module is a command or display data; the pin 5 is used to reset the screen display module.

4. The low-power education and learning system according to claim 3, characterized in that: The main control chip is connected to the voice recognition module via the 7th pin and the 8th pin, and is connected to the key module via the 28th pin, the 27th pin, the 26th pin and the 32nd pin; the 37th pin and the 34th pin of the main control chip are used as serial debugging interfaces for debugging and burning; the 20th pin and the 22nd pin of the main control chip are used to control the charging process of the main control module, and the 15th pin of the main control chip is used to monitor the voltage of the battery; the 17th pin of the main control chip is used to monitor the battery power status, and the 18th pin of the main control chip is used to control the charging temperature of the system.

5. The low-power education and learning system according to claim 1, characterized in that: The chip model used by the storage module is P25D440SH.

6. The low-power education and learning system according to claim 1, characterized in that: The power management module includes a charging unit and a power supply unit; the chip model used by the charging unit is AK4056H; the power supply unit includes a voltage stabilizing unit and a voltage dividing unit; the chip model used by the voltage stabilizing unit is LN1132, which is used to provide a standard 3.3V voltage to the main control module; the voltage dividing unit is provided with a LOW pin, which is reversely controlled by the main control module.

7. The low-power education and learning system according to claim 1, characterized in that: The chip model used by the speech recognition module is C1122.

8. The low-power education and learning system according to claim 1, characterized in that: The chip model used by the power amplifier module is FM8002.

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