System and method for observing preschool education behaviors and terminal equipment

Abstract

The invention discloses a system and method for observing preschool education behaviors and terminal equipment, and the system comprises a main control circuit, a power circuit, a storage circuit, a communication circuit, a key circuit, a camera circuit and a microphone and loudspeaker circuit. Remote backup and long-term storage of data are realized through a cloud storage function, teachers can conveniently access, review and analyze child behaviors at any time, rich materials are provided for education research, and meanwhile, a way of self emotion cognition and expression is provided for children; through the microphone and the loudspeaker control circuit, a teacher can remotely communicate with an infant in real time through the intelligent terminal, encourages, guides or solves emergencies in time, the instantaneity and interactivity of education are enhanced, and the emotional relation between the teacher and students is promoted. Scientific and technological means are introduced to assist teaching, teaching content is enriched, teaching modes are innovated, and the autonomous learning consciousness of children is cultivated.

Description

Technical Field

[0001] The present invention belongs to the technical field of preschool education, and particularly relates to a system, a method and a terminal device for observing preschool education behaviors. Background Art

[0002] At present, in the aspect of observing and recording children's behaviors in preschool education, it mainly relies on teachers' manual observation and recording. The way that teachers use pen and paper to record children's behaviors is inefficient, and recording during teaching will distract teachers' energy, making it difficult to ensure the integrity and accuracy of data.

[0003] In addition, at present, in preschool education teaching, it mainly focuses on teachers' lectures, and children are in a state of passive knowledge acceptance, lacking opportunities for active exploration and practice. Summary of the Invention

[0004] The purpose of the present invention is to provide a system, a method and a terminal device for observing preschool education behaviors, so as to overcome the problems of low teaching efficiency and poor initiative in existing preschool education.

[0005] To solve the above problems, the present invention adopts the following technical solutions: A system for observing preschool education behaviors includes a main control circuit, and a power supply circuit, a storage circuit, a communication circuit, a key circuit, a camera circuit, and a microphone and speaker circuit are connected to the main control circuit; The main control circuit is used for reading sensor data, data storage and fusion, audio control and network communication; The power supply circuit is used for supplying power to the main control circuit and charging the battery; The storage circuit is used for storing audio files and picture files; The communication circuit is used for supporting network communication of the main control circuit; The key circuit includes a "replay current audio" key, a "play current audio" key, a "play next audio" key, a "recording" key, a "happy" key and an "unhappy" key; The camera circuit is used for image acquisition of people entering and leaving the mirror; The microphone and speaker circuit is used for voice acquisition input and audio output playback.

[0006] Further, an additional circuit is also connected to the main control circuit, and the additional circuit includes a debugging key circuit, an LED circuit, an antenna and an expansion interface circuit.

[0007] Further, the main control circuit adopts a Helium Air724UG chip module, and the power supply circuit, the storage circuit, the communication circuit, the key circuit, the camera circuit and the microphone and speaker circuit are all connected to the ports of the Helium Air724UG chip module.

[0008] Further, the power supply circuit includes a Micro-USB interface circuit and a lithium battery charging circuit; The Micro-USB interface circuit includes a connector. The first pin of the connector is connected to the VBUS port of the chip module, the second pin is connected to the USB_DM port of the chip module, and the third pin is connected to the USB_DP port of the chip module. The first pin, the second pin, and the third pin are also grounded through diodes for electrostatic and surge protection. The remaining ports of the connector are not connected or grounded; The lithium battery charging circuit includes a power charging chip. One path of the fifth pin of the power charging chip is connected to the positive electrode of the lithium battery, and the other path is connected to the power supply for supplying power to the main control circuit. The eighth pin of the power charging chip is connected to the VBUS port of the chip module. The sixth pin and the seventh pin of the power charging chip are connected to the battery charging status indication circuit, and the other end of the charging status indication circuit is connected to the VBUS port of the chip module. The other pins of the power charging chip are grounded.

[0009] Further, a TF card is used in the storage circuit to store audio files and picture files. The storage circuit is connected to the V_MMC, MMC1_DATA2, MMC1_DATA3, MMC1_CMD, MMC1_CLK, MMC1_DATA0, and MMC1_DATA1 ports of the chip module; The key circuit is connected to the GPIO_9, GPIO_18, GPIO_19, GPIO_20, GPIO_21, and GPIO_22 ports of the chip module.

[0010] Further, the camera circuit is connected to the CAMI2C_SDA1, CAMI2C_SCL1, V_GLOABLE_1V8, CAM_PWDN, VCC_CAMA, VCC_CAMD, CAM_RET, CAM_REFCLK, CAM_SCK, CAM_S10, and CAM_S11 ports of the chip module.

[0011] Further, the microphone and speaker circuit includes a microphone circuit and a speaker circuit. The speaker circuit is connected to the SPK_N and SPK_P ports of the chip module, and the microphone circuit is connected to the MIC- and MIC+ ports of the chip module.

[0012] In a second aspect, a method for observing preschool education behaviors is provided, including the following steps: Obtain the current mood state of the child through the key circuit connected to the main control circuit, identify the identity of the child through the camera circuit connected to the main control circuit, and obtain the language expression audio through the microphone and speaker circuit connected to the main control circuit. The current mood state of the child, the identity of the child, and the corresponding audio file constitute the child information; Save the child information to the storage circuit and upload the child information to the cloud server through the communication circuit.

[0013] In a third aspect, a terminal device is provided, which includes the above-mentioned system for observing preschool education behaviors.

[0014] Compared with the prior art, the present invention has the following beneficial technical effects: The present invention provides a system for observing preschool education behaviors, including a main control circuit, a power supply circuit, a storage circuit, a communication circuit, a key circuit, a camera circuit, and a microphone and speaker circuit. The main functions include: key function, audio playback function, audio acquisition function, image acquisition function, and 4G Internet access function, etc. The storage circuit is used to place a TF card for storing audio files and image files. The communication circuit is used to place a SIM card to provide a 4G network for the system to achieve network interconnection. The camera circuit uses an SPI camera to collect images of the people (children) appearing on camera. The collected images are transmitted to the main control chip through the SPI protocol. Subsequently, the main control chip uploads the images to the cloud server through 4G traffic. The cloud server can identify the collected images; the present invention provides opportunities for children to actively explore and practice, realizes automatic and precise observation and recording of children's behaviors, provides a scientific basis for teachers' teaching evaluation, helps the kindergarten director's management decision-making, and at the same time strengthens the interaction and communication between home and school to promote the all-round development of children. The present invention improves the current situation that most preschool education mainly relies on teachers' manual observation and recording in the aspect of observing and recording children's behaviors. It realizes the identification of children's identities through the camera control circuit, obtains the current mood state and language expression audio of children through the key control circuit, and saves each child's information to the TF memory card to achieve large-capacity local storage to ensure the immediate preservation of data. And through the 4G network, each child's information is uploaded to the cloud server. The cloud storage function realizes the remote backup and long-term preservation of data, which is convenient for teachers to access, review and analyze children's behaviors at any time. While providing rich materials for educational research, it also provides a way for children to self-recognize and express their emotions.

[0015] The present invention improves the current teaching method of preschool education, which is mainly based on teacher lectures, and children are in a state of passively accepting knowledge and lack of active exploration and practice opportunities. It provides children with opportunities for independent exploration and listens to educational stories by actively pressing buttons. At the same time, the present invention uses microphone and speaker control circuits to enable teachers to communicate with children remotely through smart terminals in real time, give encouragement, guidance or solve emergencies in a timely manner, enhance the immediacy and interactivity of education, and promote emotional connection between teachers and students. Introducing scientific and technological means to assist teaching, enrich teaching content, innovate teaching methods, and cultivate children's awareness of independent learning.

[0016] The present invention uses key control, so even non-technical personnel can quickly master the use method, which reduces the difficulty of operation, improves the use efficiency and satisfaction of teachers, and at the same time enhances the interest and exploration of young children.

[0017] Preferably, the present invention uses the Hezhou Air724UG chip module as the main control for sensor data reading, data storage and fusion, audio control and 4G network communication. It can be connected directly through the operator's 4G network without relying on other devices. This networking method allows users to access the Internet anywhere there is 4G signal coverage, with high flexibility and mobility. Whether indoors or in outdoor activities, 4G networking can provide a stable network connection.

[0018] Preferably, in the power supply circuit of the present invention, the charging of the lithium battery is realized through the Micro-USB interface, and the TP4056-42-EMSOP8 lithium battery charging chip is used. The system of the present invention selects an SPI camera to collect pictures, and this camera has low cost and low power consumption. The present invention prolongs the battery life, reduces the charging frequency, and improves the portability and continuous working ability of the device.

[0019] Based on the above system structure, an intelligent terminal has been developed to provide children with opportunities for active exploration and practice, realize automated and precise observation and recording of children's behavior, provide a scientific basis for teachers' teaching evaluation, assist principals in management decisions, and at the same time strengthen interaction and communication between home and school, promoting the all-round development of children. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic block diagram of the circuit principle of an embodiment of the present invention; Figure 2 is a schematic diagram of a main control circuit of an embodiment of the present invention; Figure 3 is a schematic diagram of a Micro-USB connection circuit according to an embodiment of the present invention; Figure 4 is a schematic diagram of a lithium battery charging circuit according to an embodiment of the present invention; Figure 5 is a schematic circuit diagram of the MicroSD card socket according to an embodiment of the present invention; Figure 6 is a schematic circuit diagram of the Nano-SIM card socket according to an embodiment of the present invention; Figure 7 is a schematic circuit structure diagram of the left three keys of the key circuit according to an embodiment of the present invention; Figure 8 is a schematic circuit structure diagram of the right three keys of the key circuit according to an embodiment of the present invention; Figure 9 is a schematic circuit diagram of the camera interface circuit according to an embodiment of the present invention; Figure 10 is a schematic circuit diagram of the speaker interface circuit according to an embodiment of the present invention; Figure 11 is a schematic circuit diagram of the microphone interface circuit according to an embodiment of the present invention; Figure 12 is a schematic circuit diagram of the debug key circuit according to an embodiment of the present invention; Figure 13 is a schematic circuit diagram of the LED circuit according to an embodiment of the present invention; Figure 14 is a schematic diagram of the LTE_ANT antenna according to an embodiment of the present invention; Figure 15 is a schematic diagram of the WIFI_ANT antenna according to an embodiment of the present invention. Detailed implementation manners

[0021] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention clearer and more understandable, the following specific embodiments are used to further elaborate on the present invention. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0022] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Generally, the components of the embodiments of the present invention described and illustrated herein can be arranged and designed in various different configurations.

[0023] Therefore, the detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0024] It should be noted that like reference numerals and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it will not need to be further defined and explained in subsequent figures.

[0025] In the description of the embodiments of the present invention, it should also be noted that unless otherwise clearly specified and limited, if the terms "set", "installed", "connected", "connected" appear, they should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0026] A system for observing pre-school education behaviors, as Figure 1 shown, includes a power supply circuit and a key circuit that are unidirectionally connected to the main control circuit, and a storage circuit, a communication circuit, a camera circuit, and a microphone and speaker circuit that are bidirectionally connected to the main control circuit; In the above circuits, the main control circuit is used for reading sensor data, data storage and fusion, audio control, and network communication; The power supply circuit mainly includes: a Micro-USB interface circuit and a lithium battery charging circuit, which are used for supplying power to the main control circuit and charging the battery, and charging the lithium battery through the Micro-USB interface; The TF card is used to store audio files and picture files in the storage circuit; The communication circuit is a SIM card circuit, which is used to support the network communication of the main control circuit, mainly providing 4G Internet access traffic for the system, enabling the system to have functions such as uploading recording files and pictures to the cloud, downloading audio files to the TF card, and upgrading the version of the AT firmware, etc.; The key circuit has a total of 6 keys, namely: the "replay current audio" key, the "play current audio" key, the "play next audio" key, the "recording" key, the "happy" key, and the "unhappy" key.

[0027] When carrying out extracurricular activities, children use the intelligent terminal for observing pre-school education behaviors and listen to stories by pressing the keys, which helps to cultivate children's patience and the ability to actively acquire knowledge. The keys Figure 7 are the schematic diagram of the key circuit. Three keys are connected to the left side of the circuit. The functions corresponding to these three keys when pressed are: the function of replaying the current audio, the function of playing the current audio, and the function of playing the next audio (the audio files are all in the TF memory card); On the right side of the circuit, there are three buttons, which are used to detect and record the emotions of young children during preschool education, going to school, leaving school, and teacher-student interaction. The functions corresponding to the pressing of these three buttons are: recording function (the child holds down the button to record language), playing happy audio function, and playing unhappy audio function.

[0028] The camera circuit, implemented using the SPI interface, is used to collect images of people entering and leaving the scene. After the camera takes pictures of the people leaving the scene, the pictures are sent to the main control circuit through the SPI protocol. The results of pressing the button circuit, the recordings collected by the microphone and speaker circuit, and the images of the people entering the scene collected by the camera circuit will be uploaded to the cloud server through the communication circuit for teachers and parents to view and analyze.

[0029] In this embodiment, a system for observing preschool education behaviors is provided, mainly including a main control circuit, a power supply circuit, a storage circuit, a communication circuit, a button circuit, a camera circuit, a microphone and speaker circuit, and an additional circuit.

[0030] The main control circuit is used to receive and process the information and output signals of each input end; the main control circuit has a power input end, a TF card storage output end, a SIM card interface, a button signal input end, a camera receiving input end, a microphone input end, a speaker output end, and an LED display output end.

[0031] For the convenience of secondary development of preschool education behavior observation in the future, there is an expansion interface circuit in the control circuit for adding an LED lamp module and a WIFI module, etc. in the later stage, and a debugging interface circuit also reserves a code download and debugging interface.

[0032] Figure 2It is the main control circuit diagram. The Air724UG chip module of Luat is selected as the main control in this invention, which is used for reading sensor data, data storage and fusion, audio control, and 4G network communication. Among them, pins 50 - 51, 65, 78 - 80, and 84 - 88 of the main control chip, namely the CAMI2C_SDA1, CAMI2C_SCL1, V_GLOABLE_1V8, CAM_PWDN, VCC_CAMA, VCC_CAMD, CAM_RET, CAM_REFCLK, CAM_SCK, CAM_S10, and CAM_S11 ports, are used to connect the camera sensor to control it to collect images of the person entering the frame. The chip power supply terminal VBAT is connected to a 3.8V power supply, which is grounded in parallel with capacitors C40 and C41. The purpose is to filter the signal. At the same time, it is connected to the ADC2 pin to feedback the battery power usage. The PWRKEY pin of the chip controls the power on and off of the chip. The USB_BOOT and RESET pins are the code download and chip restart debugging ports. Pins 9 - 12 of the chip, namely the SIM0_V, SIM0_RST, SIM0_CLK, and SIM0_DATA ports, are connected to the SIM card. The 4G traffic provided by the SIM card is used to upload relevant information to the cloud server. Pins 14 - 16 of the chip, namely the VBUS, USB_DM, and USB_DP ports, are connected to the Micro - USB interface for charging the lithium battery and code download and debugging. Pins 18 and 19 of the chip, namely the SPK_N and SPK_P ports, are connected to the speaker to control the audio output playback. Pins 21 and 22 of the chip, namely the MIC - and MIC + ports, are connected to the microphone for voice acquisition input. Pins 24 - 30 of the chip, namely the V_MMC, MMC1_DATA2, MMC1_DATA3, MMC1_CMD, MMC1_CLK, MMC1_DATA0, and MMC1_DATA1 ports, are connected to the TF memory card for data reading and writing with the TF card. The TF card is used to store audio files, recording files, and collected pictures that need to be played. The WIFI_ANT and LTE_ANT pins of the chip are led out and connected to the antenna to transform the signal propagated on the transmission line into an electromagnetic wave propagated in free space. The three pins of the chip, SYS_STATUS, NET_MODE, and NET_STATUS, are respectively connected to the LED indicators to facilitate viewing the power - on status and network connection status of the chip. The chip ground terminal is grounded. At the same time, a total of six pins of the chip, GPIO20, GPIO21, GPIO22, GPIO19, GPIO18, and GPIO9, are connected to the buttons. The GPIO23, GIPO13, GPIO12, GPIO10, and GPIO11 pins of the chip are reserved interfaces for secondary development.

[0033] The power supply circuit mainly includes: a Micro-USB interface circuit and a lithium battery charging circuit. The lithium battery is charged through the Micro-USB interface.

[0034] Figure 3 It is a schematic diagram of the Micro-USB connection circuit. The U-F-M5DD-Y-1 connector is used. Pin 1 of the connector needs to be connected to the power supply, connected to the VBUS port of the main control chip, and grounded after connecting the capacitor C16, and grounded after connecting the diode D17 for electrostatic and surge protection. Pins 2 and 3 are used for receiving and transmitting data with the main control chip. Pin 2 is connected to the negative USB_DM data line port of the main control chip after connecting the resistor R19, and then grounded after connecting the diode D16 for electrostatic and surge protection. Similarly, pin 3 should be the same. Pin 4 of the connector is the ID port and is not connected. The remaining pins of the connector are grounded.

[0035] The lithium battery charging circuit is connected to the power input terminal of the main control circuit, used to provide the working voltage for the overall circuit, and charge the lithium battery through the Micro-USB interface, mainly providing 3.8V DC voltage for the system. As Figure 4 shown, the power charging chip used is TP4056-42-EMSOP8, with a surface-mount 8-pin package. Pin 1 of the chip is the battery temperature detection input terminal and is grounded with pin 3. Pin 2 of the chip is the constant current charging current setting and charging current detection terminal, grounded after connecting the resistor R32. Pin 4 of the chip is the positive input terminal of the input voltage, provided by connecting the VBUS pin of the Micro-USB connector, and grounded after paralleling the capacitor C27. Pin 5 of the chip is the lithium battery connection terminal, connected to pin 1 of the H1 socket for the positive pole of the lithium battery, grounded after connecting the capacitor C28, grounded again after connecting the capacitor C29, and then leading out a path to connect the diode D18 to lead out the 3.8V power supply to supply power to the main control chip, and then leading out a branch to connect the diode D19 to ground. Pin 2 of the H1 socket is connected to the negative pole of the battery, i.e., grounded. Pin 6 of the chip is the battery charging completion indication terminal, connected to the VBUS terminal of the Micro-USB connector after series-connected with the resistor R34 and the yellow-green LED diode. When the charging is completed, the yellow-green LED light is on. Similarly, pin 7 of the chip is the charging status indication terminal, connected to the VBUS terminal of the Micro-USB connector after series-connected with the resistor R33 and the orange LED diode. When the lithium battery is charging, the orange LED light is on. Pin 8 of the chip is the chip enable input terminal, connected to the VBUS terminal of the Micro-USB connector. When the input level is high, the chip is in a normal working state.

[0036] In the storage circuit, a TF card is used to store audio files and picture files. Figure 5It is a schematic diagram of a flip - type MicroSD card (TF card) socket circuit. The power supply of the power supply pin VDD of the socket is provided by the V_MMC pin of the main control chip, and is grounded after being connected in parallel with capacitors C14 and C15. The VSS pin and GND pin of the socket are both grounded. The 3 - pin CMD of the socket is a command and response multiplexing pin, receiving commands from the main control chip. The 5 - pin CLK of the socket receives the clock signal from the main control chip. The DAT0 - 3 pins of the socket are connected to the data lines, and data can be transmitted from the card to the main control chip or from the main control chip to the card. The CMD, CLK, and DAT0 - 3 pins of the socket are all connected to resistors and then connected to the power supply V_MMC, and are also connected to electrostatic and surge protection diodes and then grounded.

[0037] The communication circuit is a SIM card circuit. It uses a NANO - SIM - 501 socket. It mainly provides 4G Internet access traffic for the system, enabling the system to have functions such as uploading recording files and pictures to the cloud, downloading audio files to the TF card, and upgrading the version of the AT firmware. Figure 6 It is a schematic diagram of a Nano - SIM card socket circuit. Pins 1, 2 and C6 of the socket are not connected, and the C5 pin of the socket is grounded. The C1 pin of the socket is connected to SIM0_V of the main control chip to provide power for the SIM card, and is grounded after being connected in parallel with two capacitors C1 and C5, and is also grounded after being connected in parallel with an electrostatic and surge protection diode D13. The C2, C3 and C7 pins of the socket are respectively connected to the SIM0_RST (SIM card reset pin), SIM0_CLK (SIM card clock line) and SIM0_DATA (SIM card data line) of the main control chip after being serially connected with a resistor. To ensure good ESD protection, each of the three pins is connected in parallel with an electrostatic and surge protection diode and then grounded.

[0038] In the key circuit, there are a total of 6 keys, namely: "Re - play the current audio" key, "Play the current audio" key, "Play the next audio" key, "Record" key, "Happy" key and "Unhappy" key.

[0039] When carrying out extracurricular activities, children use the intelligent terminal for preschool education behavior observation and listen to stories by pressing the keys, which helps to cultivate children's patience and the ability to actively acquire knowledge. Figure 7It is a schematic diagram of the key circuit. Three keys are connected on the left side of the circuit. The functions corresponding to these three keys when pressed are: re-playing the current audio function, playing the current audio function, and playing the next audio function (the audio files are all in the TF memory card). Pins 1, 2, and 3 of the 5-pin terminal CH1 on the left are connected to GPIO22, GPIO21, and GPIO20 of the main control chip. These three pins are all pulled down, that is, grounded after connecting resistors. At the same time, they are all grounded after connecting capacitors for the purpose of anti-shake processing. Pin 4 is grounded, and pin 5 is connected to the 3.8V power supply in series with resistor R47 to facilitate the subsequent connection of the non-locking switch. One end of the non-locking switch is connected to the port where the terminal is connected to the main control chip (that is, pin 1 or 2 or 3), and the other end is connected to pin 5 of the terminal. When the key is not pressed, the main control GPIO detects a low level, and when the key is pressed, the main control GPIO detects a high level, thus constituting a conversion of the level.

[0040] As Figure 8 shown, three keys are connected on the right side of the circuit for detecting and recording the emotions of children during preschool education when going to school and coming home, as well as during teacher-student interaction. The functions corresponding to these three keys when pressed are: recording function (the child holds the key to record language), playing the happy audio function, and playing the unhappy audio function. The circuit principle of the 5-pin terminal CH2 on the right is the same as that of CH1. The audio files are all in the TF memory card. The results of the key presses, the recorded audio, and the images of the people entering the camera captured by the camera will be uploaded to the cloud server through 4G traffic for teachers and parents to view and analyze.

[0041] The camera circuit is implemented using the SPI interface. Figure 9It is a schematic diagram of the camera interface circuit. The camera circuit is connected to the CAMI2C_SDA1, CAMI2C_SCL1, V_GLOABLE_1V8, CAM_PWDN, VCC_CAMA, VCC_CAMD, CAM_RET, CAM_REFCLK, CAM_SCK, CAM_S10, and CAM_S11 ports of the chip module. After the camera captures a picture of the person in front of the camera, the picture is sent to the main control chip through the SPI protocol. Then, the main control chip uploads the picture to the cloud through the 4G traffic of the SIM card. Subsequently, the cloud identifies the person in the picture, and combines with the buttons (happy button, unhappy button, recording button, etc.) pressed by the child when using the terminal of the present invention to realize the recording and observation of the state of the child using the terminal. The FFC / FPC camera connector is AFC01-S24FCA-00. Pins 1, 7, 9, 12, 14, 16, 18-22 are not connected. Pins AGND and DGND are grounded. Pins 3 and 5 are respectively connected to the CAMI2C_SDA1 and CAMI2C_SCL1 of the main control chip, which is the I2C interface of the Camera. The power-on state is pull-up input. At the same time, both are connected to the 1.8V power supply after connecting resistors. Pins 4, 10, and 11 are respectively connected to the VCC_CAMA (power supply for the analog part of the Camera), VCC_CAMD (power supply for the digital part of the Camera), and 1.8V power supply of the main control chip, and are all grounded after being connected in parallel with capacitors to filter the power supply. Pin 6 is connected to the CAM_RST of the main control chip to control the restart of the Camera, and pin 8 is connected to the CAM_PWDN of the main control chip to control the shutdown of the Camera. Pins 13, 17, 23, and 24 are respectively connected in series with a resistor and then connected to the CAM_REFCLK (control the reference clock of the Camera), CAM_SCK (clock input of the SPI Camera), CAM_SI0, and CAM_SI1 (SPI Camera data input 0 and data input 1) of the main control chip, and then are all grounded after being connected in parallel with a capacitor.

[0042] The microphone and speaker circuit includes a microphone circuit and a speaker circuit: Figure 10 It is a schematic diagram of the speaker interface circuit. The speaker uses an FS-2308 speaker. When the button is pressed, the relevant audio file in the TF card is played. The positive and negative poles of the speaker are respectively connected to the speaker output pins SPK_P and SPK_N of the main control chip. A capacitor C8 is connected between the two output pins for radio frequency noise filtering and differential mode noise suppression. The positive pole of the speaker is connected to the ground after connecting a capacitor C6. At the same time, the positive pole of the speaker is also connected to the electrostatic and surge protection diode D1 and then grounded. Similarly, the negative pole of the speaker is the same.

[0043] Figure 11It is a schematic diagram of the microphone interface circuit. The microphone uses B4013AM423-093. After pressing the button, the sound collection and recording start, and after the button is lifted, the sound collection and recording end. The collected audio file is stored in the TF memory card, and then the recorded audio file is uploaded to the cloud server. The connection circuit principle of the microphone is the same as that of the speaker.

[0044] The additional circuit includes a debugging button circuit, an LED circuit, an antenna, and an expansion interface circuit: Figure 12 It is a schematic diagram of the debugging button circuit. PWRKEY is used to control the chip to turn on and off. In the chip shutdown state, long-press the PWRKEY button, and after pulling down the level for 1.5 seconds, the chip turns on; in the powered-on state, long-press the PWRKEY button, and after pulling down the level for 1.5 seconds, the chip shuts down. RESET is used for chip reset, and USB_BOOT is used for the burning and debugging of program code. One end of the interfaces of the three buttons is connected to a capacitor and then grounded, aiming to prevent button touch jitter. The other end of the PWRKEY and RESET buttons is grounded, and the other end of the USB_BOOT button is connected to resistor R40 and then connected to the 1.8V power supply.

[0045] Figure 13 It is a schematic diagram of the LED circuit, which is used to view the startup and running status of the chip and the connection status of 4G and WIFI networks. A triode is used to drive the LED to turn on and off.

[0046] Figure 14 and Figure 15 It is a schematic diagram of the WIFI_ANT and LTE_ANT antennas. Among them, the WIFI antenna uses an external antenna interface, BWIPX-4-001E is the external antenna interface, and the LTE antenna uses a PCB board-mounted antenna.

[0047] The expansion interface circuit is used to add function modules such as buttons, LED modules, and WIFI modules in the later stage.

[0048] In summary, the present invention discloses a system for preschool education behavior observation, mainly including a main control circuit, a power supply circuit, a storage circuit, a communication circuit, a button circuit, a camera circuit, a microphone and speaker circuit, and an additional circuit. In the terminal system of the present invention, the main functions include: button function, audio playback function, audio collection function, image collection function, 4G Internet access function, etc.

[0049] The storage circuit is used to place a TF card for storing audio files and image files. The communication circuit is used to place a SIM card to provide a 4G network for the system to achieve network interconnection. The camera circuit uses an SPI camera to collect images of the children (toddlers) entering the scene. The collected images are transmitted to the main control chip through the SPI protocol. Subsequently, the main control chip uploads the images to the cloud server through 4G traffic, and the cloud server can identify the collected images.

[0050] The present invention provides an environment for toddlers to explore independently, encourages them to learn and explore actively, and cultivates their ability to think independently and solve problems. When toddlers use the terminal system of the present invention, they can listen to stories by pressing the "Start Playing Story" button. At the same time, the present invention also provides a "Replay Current Story" button and a "Play Next Story" button.

[0051] In addition to focusing on cultivating the independent learning ability of toddlers, the present invention also pays attention to their mood state and language expression. The terminal system of the present invention also has a "Happy" button, an "Unhappy" button, and a "Recording" button. When entering and leaving the kindergarten, toddlers use the terminal system of the present invention to express happiness by pressing the "Happy" button or express unhappiness by pressing the "Unhappy" button. At the same time, they can also press the "Recording" button for language expression.

[0052] The present invention focuses on solving the limitations of preschool education courses, introduces scientific and technological means to assist teaching, enriches teaching content, innovates teaching methods, cultivates toddlers' independent learning, pays attention to toddlers' emotions, promotes the continuous improvement and perfection of preschool education courses, and provides more powerful support for the all-round development of toddlers.

[0053] The present invention also protects a terminal device, which includes the above system for observing preschool education behaviors. The users of the present invention are preschool teachers and toddlers. Both use a terminal device of the present invention in different spaces at the same time, and use the microphones and speakers of their respective devices to conduct real-time voice dialogue interactions through the 4G network. The teacher device can view the toddlers entering the scene captured by the camera on the server and identify the identity of the toddlers in the current dialogue, enhancing the interactivity and experience of preschool education courses.

[0054] The present invention also provides a method for observing preschool education behaviors, including the following steps: Obtain the current mood state of toddlers through a key circuit connected to the main control circuit, identify the identity of toddlers through a camera circuit connected to the main control circuit, and obtain the audio of language expression through a microphone and speaker circuit connected to the main control circuit. The current mood state of toddlers, the identity of toddlers, and the corresponding audio files form toddler information; Save the toddler information to the storage circuit and upload the toddler information to the cloud server through the communication circuit.

[0055] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited thereto. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solutions of the present invention, including any other suitable combination of each technical feature. These simple modifications and combinations should also be regarded as the content disclosed by the present invention and fall within the protection scope of the present invention.

Claims

1. A system for observing preschool education behavior, characterized in that: It includes a main control circuit, to which a power supply circuit, a storage circuit, a communication circuit, a key circuit, a camera circuit, and a microphone and speaker circuit are connected; The main control circuit is used for reading sensor data, data storage and fusion, audio control and network communication; The power supply circuit is used for powering the main control circuit and charging the battery; The storage circuit is used to store audio files and picture files; The communication circuit is used to support the network communication of the main control circuit; The button circuit includes a "replay current audio" button, a "play current audio" button, a "play next audio" button, a "record" button, a "happy" button and an "unhappy" button; The camera circuit is used to collect images of people entering and exiting the camera; The microphone and speaker circuit is used for voice collection input and audio output playback.

2. A system for preschool education behavior observation according to claim 1, characterized in that: The main control circuit is also connected to an additional circuit, which includes a debugging button circuit, an LED circuit, an antenna and an expansion interface circuit.

3. A system for preschool education behavior observation according to claim 1, characterized in that: The main control circuit adopts the Hezhou Air724UG chip module, and the power circuit, storage circuit, communication circuit, key circuit, camera circuit, microphone and speaker circuit are all connected to the port of the Hezhou Air724UG chip module.

4. A system for preschool education behavior observation according to claim 3, characterized in that: The power supply circuit includes a Micro-USB interface circuit and a lithium battery charging circuit; The Micro-USB interface circuit includes a connector, wherein a first pin of the connector is connected to a VBUS port of a chip module, a second pin is connected to a USB_DM port of the chip module, and a third pin is connected to a USB_DP port of the chip module, the first pin, the second pin, and the third pin are also grounded after being connected to a diode for static electricity and surge protection, and the remaining ports of the connector are not connected or grounded; The lithium battery charging circuit includes a power charging chip, the fifth pin of the power charging chip is connected to the positive electrode of the lithium battery in one way, and is connected to the power supply for powering the main control circuit in another way, the eighth pin of the power charging chip is connected to the VBUS port of the chip module, the sixth pin and the seventh pin of the power charging chip are connected to the battery charging status indication circuit, the other end of the charging status indication circuit is connected to the VBUS port of the chip module, and the other pins of the power charging chip are grounded.

5. A system for preschool education behavior observation according to claim 3, characterized in that: The storage circuit uses a TF card to store audio files and picture files, and the storage circuit is connected to the V_MMC, MMC1_DATA2, MMC1_DATA3, MMC1_CMD, MMC1_CLK, MMC1_DATA0 and MMC1_DATA1 ports of the chip module; The communication circuit adopts a SIM card circuit, and the SIM card circuit is connected to the SIM0_V, SIM0_RST, SIM0_CLK and SIM0_DATA ports of the chip module.

6. A system for preschool education behavior observation according to claim 3, characterized in that: The key circuit is connected to the GPIO_9, GPIO_18, GPIO_19, GPIO_20, GPIO_21 and GPIO_22 ports of the chip module.

7. A system for preschool education behavior observation according to claim 3, characterized in that: The camera circuit is connected to the CAMI2C_SDA1, CAMI2C_SCL1, V_GLOABLE_1V8, CAM_PWDN, VCC_CAMA, VCC_CAMD, CAM_RET, CAM_REFCLK, CAM_SCK, CAM_S10 and CAM_S11 ports of the chip module.

8. A system for preschool education behavior observation according to claim 3, characterized in that: The microphone and speaker circuit includes a microphone circuit and a speaker circuit. The speaker circuit is connected to the SPK_N and SPK_P ports of the chip module, and the microphone circuit is connected to the MIC- and MIC+ ports of the chip module.

9. A method for observing preschool education behavior, characterized in that: The system for observing preschool education behavior according to any one of claims 1 to 8 comprises the following steps: The current mood state of the child is obtained through the key circuit connected to the main control circuit, the identity of the child is recognized through the camera circuit connected to the main control circuit, and the language expression audio is obtained through the microphone and speaker circuit connected to the main control circuit. The current mood state of the child, the identity of the child and the corresponding audio file constitute the child information; The child information is saved in the storage circuit and uploaded to the cloud server through the communication circuit.

10. A terminal device, characterized in that: The terminal device includes a system for observing preschool education behavior as described in any one of claims 1-8.

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