Low-power-consumption 4G intelligent wearable device and control method thereof

Abstract

The embodiment of the invention provides a low-power-consumption 4G intelligent wearable device and a control method thereof, and belongs to the technical field of intelligent wearable equipment. The device is characterized by comprising a Bluetooth main control chip, a plurality of sensor modules, a 4G communication module, an audio circuit and a power management module, wherein the Bluetooth main control chip is connected with the sensor module and is used for acquiring physiological parameter data; the 4G communication module is connected with the Bluetooth main control chip through a serial port or an IIS interface; the audio circuit is respectively connected with the Bluetooth main control chip and the 4G communication module; the power management module is connected with the Bluetooth main control chip, the sensor module and the 4G communication module. The 4G intelligent wearable device provided by the scheme of the invention is simple in structure, and has the comprehensive technical effects of low power consumption, module decoupling and controllable cost.

Description

Technical Field

[0001] The present invention relates to the technical field of intelligent wearable devices, and in particular to a low-power 4G intelligent wearable device and a control method for the low-power 4G intelligent wearable device. Background Art

[0002] With the development of the Internet of Things and mobile communication technologies, smart wearable devices are widely used in scenarios such as health monitoring, sports tracking, and voice communication. In order to realize the functions of data collection and cloud interaction, existing smart wearable products generally adopt a main control architecture with 4G communication chips as the core, and integrate Bluetooth functions to support local short-distance communication. Under this architecture, sensors such as heart rate, blood oxygen, and pedometers are directly connected to the 4G communication chip, which uniformly processes and uploads data.

[0003] However, this solution has two prominent problems in practical applications. The first is the power consumption problem. The 4G communication chip itself is designed for high-performance communication equipment. Its working current is large and its standby power consumption is high. When it not only undertakes communication tasks but also processes sensor data at the same time, the normal power consumption increases further. For smart wearable devices with limited volume and limited battery capacity, this directly leads to a shortened battery life and cannot meet the needs of long-term wearing. In addition, the heat problem caused by high power consumption may also affect wearing comfort and system stability.

[0004] The second is the cost issue. Although concentrating multiple functions in a highly integrated main control chip can save board-level space, it also brings higher device costs and wiring complexity. The price of 4G communication chips is generally higher than that of general-purpose MCUs or low-power communication chips. After assuming the main control responsibilities, the requirements for supporting designs such as peripheral power supply, clock, and RF shielding are also increased accordingly, increasing the overall material cost and R&D difficulty. While this integrated architecture meets the basic functions, it also limits the promotion and popularization of smart wearable devices in the low-cost and medium-cost markets.

[0005] In summary, existing smart wearable devices adopt a centralized architecture with 4G communication chips as the main control, which has problems such as high power consumption, short battery life and high device cost. It is urgent to optimize the system structure to reduce energy consumption and cost and improve the market adaptability of the product. Summary of the invention

[0006] The purpose of the embodiments of the present invention is to provide a low-power 4G smart wearable device and a control method thereof, so as to at least solve the problems of high power consumption, short battery life and high device cost in existing smart wearable devices which adopt a centralized architecture with 4G communication chips as the main control.

[0007] In order to achieve the above-mentioned purpose, the first aspect of the present invention provides a low-power 4G smart wearable device, which includes: a Bluetooth main control chip, multiple sensor modules, a 4G communication module, an audio circuit, and a power management module; wherein the Bluetooth main control chip is connected to the sensor module for collecting physiological parameter data; the 4G communication module is connected to the Bluetooth main control chip through a serial port or an IIS interface; the audio circuit is respectively connected to the Bluetooth main control chip and the 4G communication module; the power management module is respectively connected to the Bluetooth main control chip, the sensor module and the 4G communication module.

[0008] Optionally, the Bluetooth main control chip includes a first micro control unit and a first storage unit; the first micro control unit is used to execute data acquisition and protocol stack processing procedures; the first storage unit is used to cache historical data and abnormal flag information of the sensor module.

[0009] Optionally, the 4G communication module includes a second micro control unit and a SIM card interface module; the second micro control unit performs serial port communication with the Bluetooth main control chip through an AT instruction set; and the SIM card interface module is independently connected to the second micro control unit.

[0010] Optionally, the audio circuit includes a voice codec, a capacitive coupling circuit and a bias resistor network, and the voice codec has a dual working mode that supports both an analog interface and an IIS interface; the power management module includes a first field effect transistor switch controlled by the Bluetooth main control chip, and the first field effect transistor switch is connected in series to the power input terminal of the 4G communication module for controlling the on and off state of the 4G communication module.

[0011] Optionally, the Bluetooth main control chip and the sensor module are connected via a multi-channel I2C bus; the address space of the I2C bus is statically configured by the Bluetooth main control chip, and is configured with a state detection interrupt pin for reporting abnormal events.

[0012] Optionally, the display module is a graphic display unit based on a TFT driver chip; the Bluetooth main control chip is electrically connected to the display module via an SPI bus and a separate reset control pin; the Bluetooth main control chip is also connected to an EEPROM non-volatile memory for storing historical data thresholds, a PSM wake-up strategy table and a communication event record table.

[0013] Optionally, the Bluetooth main control chip is provided with an abnormal event processing logic module; the abnormal event processing logic module is used to determine whether an upload request signal is generated, and wake up the 4G communication module through a hardware interrupt when the request is established.

[0014] A second aspect of the present invention provides a control method for a low-power 4G smart wearable device, which is applied to the above-mentioned low-power 4G smart wearable device, and the method includes: initializing multiple sensor modules and starting data collection after the Bluetooth main control chip is powered on; preprocessing and caching the collected data, and judging whether communication needs to be triggered according to preset conditions; if the communication triggering conditions are met, the Bluetooth main control chip wakes up the 4G communication module through the serial port or IIS interface; the 4G communication module completes power-on startup and establishes a communication connection for voice or data transmission; after the transmission is completed, the 4G communication module is controlled to enter a low-power mode.

[0015] Optionally, the Bluetooth main control chip executes initialization commands on each sensor module in sequence according to a preset order, and configures a polling sampling period and a response interrupt pin logic for the successfully initialized modules; waking up the 4G communication module includes: setting the UART interface to a sendable state, raising the power control pin level, and configuring the internal IO state retention logic of the Bluetooth main control chip.

[0016] On the other hand, the present invention provides a computer-readable storage medium, which stores instructions, which, when executed on a computer, enable the computer to execute the control method of the low-power 4G smart wearable device.

[0017] Through the above technical solution, by using the Bluetooth main control chip as the core control unit, connecting multiple sensor modules in a unified manner, and using the 4G communication module as an auxiliary communication component, the device effectively realizes the division of labor management of the core functional modules. The Bluetooth main control chip itself has low power consumption characteristics and undertakes daily data collection and processing tasks, which can keep the 4G communication module in a low power state for a long time and wake it up only when necessary, thereby significantly reducing the power consumption of the whole machine. The bidirectional connection structure of the audio circuit supports analog or digital voice signal transmission and enhances communication flexibility. The power management module independently controls the power supply of each functional unit, further improving the power consumption scheduling capability of the system, which is conducive to extending the battery life of the device and reducing the thermal load of the system. The device has a simple structure and has the comprehensive technical effects of low power consumption, module decoupling and controllable cost.

[0018] Other features and advantages of the embodiments of the present invention will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are used to provide a further understanding of the embodiments of the present invention and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the embodiments of the present invention, but do not constitute a limitation on the embodiments of the present invention. In the accompanying drawings:

[0020] Figure 1It is a device structure diagram of a low-power 4G smart wearable device provided by an embodiment of the present invention;

[0021] Figure 2 It is a step flow chart of a control method for a low-power 4G smart wearable device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0022] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.

[0023] Figure 1 1 is a device structure diagram of a low-power 4G smart wearable device provided by an embodiment of the present invention. Figure 1 As shown, an embodiment of the present invention provides a low-power 4G smart wearable device, and the system includes: a Bluetooth main control chip, multiple sensor modules, a 4G communication module, an audio circuit, and a power management module; wherein the Bluetooth main control chip is connected to the sensor module for collecting physiological parameter data; the 4G communication module is connected to the Bluetooth main control chip through a serial port or an IIS interface; the audio circuit is respectively connected to the Bluetooth main control chip and the 4G communication module; the power management module is respectively connected to the Bluetooth main control chip, the sensor module and the 4G communication module.

[0024] In an embodiment of the present invention, the Bluetooth main control chip serves as the core control unit of the system, and is connected to multiple sensor modules for real-time collection of multiple physiological parameter data including heart rate, blood oxygen, blood pressure, body temperature, motion status, etc. The Bluetooth main control chip not only has low power consumption characteristics, but also integrates a microprocessing unit, which can pre-process, store and classify the collected data. The 4G communication module does not directly participate in daily data collection and processing, but establishes a communication connection with the Bluetooth main control chip through a serial port (UART) or an audio digital interface (IIS). When a specific trigger condition (such as active user operation or abnormal physiological data) is met, the Bluetooth main control chip controls its startup, which is used to make voice calls or upload key data to a remote server or cloud platform.

[0025] The audio circuit is connected to the Bluetooth main control chip and the 4G communication module respectively, supporting analog voice signal paths (MIC_P / N, SPK_P / N) or digital audio paths (IIS), and can adapt to different types of voice transmission methods. The power management module is used to provide stable power support for each functional unit, and has time-sharing control capabilities. It can dynamically switch the power supply mode of each module according to the system operation status, especially controlling the 4G communication module to enter a low-power standby state when it is idle.

[0026] Based on the solution of the present invention, by decoupling the high-power communication module from the low-power main control chip and supplemented by a refined power management strategy, the low-power consumption and low-heat output characteristics of the smart wearable device under long-term operation are achieved, while also reducing the overall complexity and material cost of the system, and having good technical promotion and application value.

[0027] Preferably, the Bluetooth main control chip includes a first micro control unit and a first storage unit; the first micro control unit is used to execute data acquisition and protocol stack processing procedures; the first storage unit is used to cache historical data and abnormal flag information of the sensor module.

[0028] In an embodiment of the present invention, the Bluetooth main control chip includes a first micro control unit and a first storage unit. As the core control logic module of the chip, the first micro control unit integrates a processor core, a timer, a communication interface controller and an interrupt control module, and can run an embedded control program to complete the data acquisition task of multiple sensor modules. At the same time, the micro control unit also integrates a low-power Bluetooth protocol stack to achieve short-distance data communication with external devices (such as mobile phones, hosts or cloud gateways). In specific applications, the first micro control unit collects various sensor signals such as heart rate, blood oxygen, blood pressure, motion acceleration, etc. through polling or interruption, and performs preliminary data processing according to the set sampling frequency and judgment logic, including data formatting, value screening, boundary judgment and flag generation.

[0029] The first storage unit is connected to the data path of the first microcontroller unit and is used to temporarily or periodically cache the sensor data and its processing results. In particular, when the communication module is not in working state, the system can temporarily save important historical data in the first storage unit so that it can be uploaded uniformly after the communication link is established. At the same time, the first storage unit also stores the threshold parameters set for various sensors and their abnormal state flag information, which is used to determine whether the collected data triggers an alarm or upload event.

[0030] Based on the solution of the present invention, the Bluetooth main control chip can independently complete data collection, preliminary analysis and caching functions without relying on the response of the high-power communication module in real time, realizing the working mechanism that the system is independently operated by the low-power unit most of the time. This design improves the energy efficiency of the overall operation of the system, effectively extends the battery life of the wearable device, and provides a data basis for the on-demand activation of the communication module, with good low-power consumption and data integrity protection technical effects.

[0031] Preferably, the 4G communication module includes a second micro control unit and a SIM card interface module; the second micro control unit performs serial port communication with the Bluetooth main control chip through an AT instruction set; and the SIM card interface module is independently connected to the second micro control unit.

[0032] In an embodiment of the present invention, the 4G communication module includes a second micro control unit and a SIM card interface module, wherein the second micro control unit is a core control component for realizing the 4G communication function. The micro control unit integrates a communication protocol stack processor, a serial port controller, a power management controller, and a network connection management unit, and can complete functions such as signal connection, data transmission and reception, and voice channel establishment with a cellular network. The second micro control unit establishes a connection with the Bluetooth main control chip through a serial port communication interface, and uses a standard AT instruction set for command parsing and response process control. The Bluetooth main control chip can send control instructions such as dialing, disconnection, uploading, and status query to the second micro control unit through AT instructions, and the second micro control unit parses and executes the corresponding communication operations.

[0033] The SIM card interface module is independently connected to the second micro control unit to provide user identity authentication information required for 4G communication. The module complies with the standard SIM interface protocol and includes a card holder, power supply filtering, ESD protection and data line transceiver circuit to ensure the stability and reliability of communication. The independent design of the SIM card interface helps to achieve modular layout, so that the communication module has better flexibility during system integration and supports the network access requirements of different operators.

[0034] By dividing the 4G communication module into an independent control unit and SIM card interface, and using AT commands to perform low-bandwidth asynchronous communication with the Bluetooth main control chip, this system can activate the second micro control unit and its associated circuits when the Bluetooth main control chip determines that the communication demand is established, thereby reducing the normal power consumption burden of the communication module. This structural design has a high communication resource control capability, supports on-demand communication wake-up, effectively reduces system power consumption, and extends device battery life, while retaining complete 4G communication capabilities, and has good scalability and compatibility.

[0035] Preferably, the audio circuit includes a voice codec, a capacitive coupling circuit and a bias resistor network, and the voice codec has a dual working mode that supports both an analog interface and an IIS interface; the power management module includes a first field effect transistor switch controlled by the Bluetooth main control chip, and the first field effect transistor switch is connected in series to the power input terminal of the 4G communication module for controlling the on and off state of the 4G communication module.

[0036] In an embodiment of the present invention, the audio circuit includes a voice codec, a capacitive coupling circuit and a bias resistor network, wherein the voice codec is a core component for realizing voice input and output, and has a dual working mode that supports both analog audio interface and digital audio interface (IIS), and can select an adaptive audio communication path according to the system configuration. In analog mode, the voice codec is connected to the microphone and speaker through the standard MIC_P / MIC_N and SPK_P / SPK_N pins, which is suitable for traditional audio application scenarios; in digital mode, the voice codec exchanges digital audio data with the Bluetooth main control chip or 4G communication module through the IIS interface to achieve higher precision and lower noise voice processing. The capacitive coupling circuit is used to isolate the DC bias and suppress low-frequency noise to ensure the stability and sound quality of the audio signal, and the bias resistor network provides a reference voltage and stable working conditions for the analog audio path to ensure that the voice device can still work reliably under a variety of power supply conditions.

[0037] The power management module is provided with a first field effect transistor switch controlled by the Bluetooth main control chip, which is connected in series in the power input path of the 4G communication module to control its power on / off state. When the system detects that the communication function is not needed, the Bluetooth main control chip turns off the field effect transistor through the IO control signal, thereby completely cutting off the power supply of the 4G communication module and realizing physical level energy consumption blocking; and when the communication demand appears, the field effect transistor is controlled to be turned on, so that the 4G communication module obtains power and completes the initialization and communication connection.

[0038] Based on the solution of the present invention, the dual-mode voice codec improves the system's compatibility with analog and digital audio, making the wearable device more adaptable in voice calls and data transmission. At the same time, the field effect transistor control circuit avoids the static power consumption generated by the long-term standby of the communication module, significantly improves the battery life of the whole device, and has the technical effects of low power consumption, high adaptability and strong scalability.

[0039] Preferably, the Bluetooth main control chip and the sensor module are connected via a multi-channel I2C bus; the address space of the I2C bus is statically configured by the Bluetooth main control chip, and is configured with a state detection interrupt pin for reporting abnormal events.

[0040] In an embodiment of the present invention, the Bluetooth main control chip is connected to the sensor module through multiple I2C lines to realize data acquisition and control communication of various physiological parameter sensors. As a two-wire serial bus, the I2C bus has the advantages of simple structure and less hardware resource occupation, and is suitable for the application requirements of centralized management of multiple sensors in smart wearable devices with limited volume. The Bluetooth main control chip integrates multiple I2C controller channels, which are respectively allocated to different categories of sensor modules, including but not limited to heart rate sensors, blood oxygen sensors, blood pressure sensors and acceleration sensors. Through the physically separated I2C channel design, the system can improve the rate and reliability of multi-module parallel communication and avoid response delays caused by bus conflicts.

[0041] The address space of the I2C bus is statically configured by the Bluetooth main control chip during the system initialization phase, and different sensor modules are uniquely identified and access controlled through a solidified address mapping table, thereby realizing a low-overhead, predictable bus management mechanism. Each I2C slave device address remains unchanged during system operation, simplifying the data scheduling logic of the main control chip. At the same time, an independent status detection interrupt pin is configured on each I2C channel, and the interrupt pin is connected to the programmable interrupt controller of the Bluetooth main control chip, which is used to immediately send a hardware interrupt signal to notify the Bluetooth main control chip to enter a rapid response process when the sensor detects a specific threshold event (such as abnormal heart rate, fall, low blood oxygen).

[0042] Based on the solution of the present invention, parallel management and real-time abnormal detection processing of multiple physiological sensors are realized, and the system's response speed to emergencies and data processing capabilities are enhanced. Through static address configuration and interrupt pin coordination, the system can obtain key health data and trigger subsequent communication operations at any time while maintaining low power consumption. It significantly improves the real-time monitoring capability and power consumption control capability of smart wearable devices, and has a comprehensive technical effect of fast response, low resource occupation and high scalability.

[0043] Preferably, the display module is a graphic display unit based on a TFT driver chip; the Bluetooth main control chip is electrically connected to the display module via an SPI bus and a separate reset control pin; the Bluetooth main control chip is also connected to an EEPROM non-volatile memory for storing historical data thresholds, a PSM wake-up strategy table and a communication event record table.

[0044] In the embodiment of the present invention, the display module is a graphic display unit based on a TFT driver chip, which is constructed using thin film transistor liquid crystal (Thin Film Transistor LCD) technology, has high brightness, contrast and image refresh speed, and can realize multi-type information display including text, icons, curves, animations, etc., to meet the requirements of user interaction friendliness and information visualization in smart wearable devices. The display module is internally integrated with a dedicated image refresh controller and frame buffer register, which can independently perform image rendering tasks and reduce the computing burden of the Bluetooth main control chip.

[0045] The Bluetooth main control chip and the display module communicate data via the SPI (Serial Peripheral Interface) bus, which supports high-speed synchronous data transmission, effectively improves image refresh efficiency, and ensures the smoothness of interface response. In order to enhance the stability of the system and the controllability of the display module, the Bluetooth main control chip is also connected to the display module through a separate reset control pin, which is used to perform a hardware-level restart operation when the device is turned on, fault recovery, or system switching mode, ensuring that the display module enters a controlled initial state and improving the reliability of system operation.

[0046] In addition, the Bluetooth main control chip is also connected to an EEPROM non-volatile memory, which is used to store multiple configuration data closely related to system operation, including but not limited to historical data threshold settings of various sensors, PSM (Power Saving Mode) wake-up strategy table of 4G communication module, timestamp record table of communication events, etc. This non-volatile storage structure can retain data content after power failure, providing basic data support for system abnormal recovery, restart initialization, intelligent communication scheduling and other functions.

[0047] Based on the solution of the present invention, while having efficient graphic display capabilities, a control architecture with low resource usage is realized, which improves the human-computer interaction experience; in conjunction with the EEPROM persistent storage mechanism, the traceability and stability of the system configuration are enhanced. The overall technical effect is manifested as: fast interface response, flexible configuration management, strong data persistence, and high operational stability, which is suitable for the technical requirements of long-term and high-frequency use in smart wear scenarios.

[0048] Preferably, the Bluetooth main control chip is provided with an abnormal event processing logic module; the abnormal event processing logic module is used to determine whether an upload request signal is generated, and wake up the 4G communication module through a hardware interrupt when the request is established.

[0049] In an embodiment of the present invention, the Bluetooth main control chip is provided with an abnormal event processing logic module, which is integrated into the microprocessor system of the chip and runs in the firmware framework of the main control chip in the form of a fixed program or configurable logic. The abnormal event processing logic module establishes a real-time data communication link with the data channels of multiple sensor modules, and receives the detection values ​​from various physiological parameter sensors periodically or based on interrupts. The module is provided with a threshold comparison logic, an event status register and an upload request determination unit for dynamic comparison, critical judgment and event classification of the received data. Once the data collected by the sensor exceeds the set normal range, or a specific state change is identified (such as sudden change in heart rate, rapid drop in blood oxygen, drastic acceleration change, etc.), the module generates an upload request flag signal locally.

[0050] When the upload request condition is determined to be established, the abnormal event processing logic module immediately generates a set of hardware interrupt signals through the GPIO interrupt controller configured inside the Bluetooth main control chip, and outputs the interrupt signal to the control pin of the 4G communication module connected to it. After receiving the interrupt signal, the 4G communication module starts the power control path and enters the working state, completing operations such as communication link initialization, data packaging and reporting. This control process does not rely on the traditional polling mechanism or high-frequency communication handshake, effectively reducing the resource occupation and communication wake-up delay of the main control chip.

[0051] Based on the scheme of the present invention, by introducing the abnormal event processing logic module, the Bluetooth main control chip realizes the ability of local intelligent judgment and rapid response, without relying on external servers to participate in the judgment logic, which greatly improves the timeliness of event processing and the level of system adaptability. This design enables the system to have the ability to instantly wake up the communication function while maintaining a low-power standby state, effectively balancing the contradiction between power consumption control and real-time performance, and has the technical effects of event-driven, efficient response and energy-saving operation.

[0052] In one possible implementation, this embodiment provides a low-power 4G smart wearable device, which is suitable for health monitoring smart watch devices, and has multiple physiological parameter collection, local processing, event upload and voice communication functions. It can maintain low power consumption operation while ensuring the real-time response and communication capabilities of the system.

[0053] The device body uses a dual-mode Bluetooth main control chip as the core control unit. The Bluetooth main control chip integrates a microcontroller and a storage module, and is equipped with multiple I2C bus interfaces and SPI interfaces. Multiple sensor modules are connected to the Bluetooth main control chip through the I2C bus, including a heart rate sensor, a blood oxygen sensor, a three-axis acceleration sensor, and a body temperature sensor. After startup, the Bluetooth main control chip initializes each sensor module in turn, collects data once every 5 seconds, and performs threshold comparison and abnormal judgment locally.

[0054] A 4G communication module is connected to the Bluetooth main control chip through the UART interface and is in the default power-off state. An N-channel MOS tube controlled by the Bluetooth main control chip is connected in series in the power management module. The MOS tube controls the power supply circuit of the 4G communication module and is in the shutdown mode in the initial state. The Bluetooth main control chip is equipped with an abnormal event processing logic module. When the heart rate detection value exceeds the preset upper limit twice in a row, the logic module generates an upload request and pulls up the MOS tube control pin through the IO port to turn on the 4G communication module power supply circuit.

[0055] After the communication module is started, the Bluetooth main control chip configures the 4G communication module through AT commands to establish a data link, and packages the abnormal heart rate data in the cache and uploads it to the remote server, while triggering the mobile APP to push alarm information. After the data is uploaded, the Bluetooth main control chip issues a power-off command and turns off the MOS tube, so that the 4G communication module re-enters the dormant state, ensuring that the system returns to low-power operation.

[0056] In the voice communication scenario, the voice codec in the audio circuit switches to IIS mode and connects to the IIS interface of the Bluetooth main control chip and the 4G communication module respectively to achieve transparent transmission of digital voice signals. The earphone and microphone are connected to the SPK and MIC pins of the codec respectively to ensure stable call quality.

[0057] In addition, the device also includes a TFT color display module and EEPROM non-volatile memory. The former is connected to the Bluetooth main control chip through the SPI interface to display physiological data, communication status and alarm information; the latter is used to save historical threshold configurations, communication records and user identification parameters, which facilitates device status recovery after power failure and continuous strategy management.

[0058] This embodiment uses a Bluetooth chip to implement the main control function and sensor management without introducing a highly integrated 4G main control chip. The 4G communication module is started only when necessary, which effectively reduces the overall power consumption. At the same time, it improves the flexibility of the system structure and the reliability of communication, and has strong practical application value and promotion prospects.

[0059] Figure 2 1 is a flow chart of a method for controlling a low-power 4G smart wearable device provided by an embodiment of the present invention. Figure 2 As shown, an embodiment of the present invention provides a control method for a low-power 4G smart wearable device, the method comprising:

[0060] Step S10: After the Bluetooth main control chip is powered on, multiple sensor modules are initialized and data collection begins.

[0061] Specifically, after completing the power-on reset, the Bluetooth main control chip first initializes its own system clock, communication interface (such as I2C, SPI) and internal interrupt controller. Subsequently, the main control chip sends initialization instructions to each connected sensor module in turn, including heart rate sensor, blood oxygen sensor, acceleration sensor, etc. Each sensor module communicates through the I2C bus, and the main control chip configures its working mode, sampling period, data format and other parameters. After completing the initialization, the Bluetooth main control chip performs polling or interrupt collection operations at the set time interval, reads the original physiological parameter data and stores it in the internal RAM or the cache storage unit connected to it for subsequent judgment and processing.

[0062] Step S20: pre-processing and caching the collected data, and determining whether communication needs to be triggered according to preset conditions.

[0063] Specifically, the Bluetooth main control chip performs a data filtering and formatting operation on each set of physiological data collected to remove jitter and interference. After processing, the data is compared with the preset historical threshold. For example, when the continuous heart rate exceeds 120 times / minute, or the blood oxygen is lower than 92%, the main control chip sets the corresponding flag to "abnormal". All collected data and flag information are written to the internal cache area and recorded with a timestamp. When two or more consecutive sets of data are found to be in an abnormal state, or the user triggers an emergency upload by pressing a button, the abnormal event processing logic module inside the Bluetooth main control chip will output a communication request flag and determine that subsequent communication operations need to be triggered.

[0064] Step S30: If the triggering communication condition is met, the Bluetooth main control chip wakes up the 4G communication module through the serial port or IIS interface.

[0065] Specifically, when the communication request is confirmed, the Bluetooth main control chip controls the field effect transistor switch in the power management module to turn on the power supply path connected to the 4G communication module and start its power supply process. At the same time, the main control chip also sends a wake-up signal to the 4G communication module through the serial port (UART) or audio interface (IIS), such as an AT command string or a start byte, to notify the 4G module to start the internal communication protocol stack. If the design supports hardware interrupt wake-up, the rising edge signal can also be directly output through the GPIO pin to trigger the interrupt. The Bluetooth main control chip also monitors the response status of the 4G module at this stage to ensure that it has completed initialization and entered a communicative state.

[0066] Step S40: The 4G communication module completes power-on startup and establishes a communication connection for voice or data transmission.

[0067] Specifically, after power-on, the 4G communication module starts its built-in microcontroller unit and SIM card interface module, and automatically searches for and accesses the cellular network. After successful access, the Bluetooth main control chip configures the data upload method through AT instructions, such as HTTP / HTTPS or MQTT protocol, and packages the abnormal data in the cache and sends it to the cloud server as needed. If it is a voice scene, the Bluetooth main control chip and the 4G module exchange audio data through the IIS interface, and the audio signal is format-converted by the voice codec and sent to the headset or microphone. The entire communication process is initiated and fully controlled by the Bluetooth main control chip, including the start of communication, data transmission, and status judgment at the end of communication.

[0068] Step S50: After the transmission is completed, the 4G communication module is controlled to enter a low power consumption mode.

[0069] Specifically, after the communication task is completed, the Bluetooth main control chip will determine whether the data is successfully transmitted or whether the call has ended based on the status code returned by the 4G communication module. After confirming that there is no subsequent transmission task, the Bluetooth main control chip will notify the 4G module to exit the communication state through AT instructions or control pins, and control the field effect transistor to shut down its power path, so that the 4G module enters a physical power-off state. If the system design supports PSM (Power Saving Mode), the 4G module can also be instructed to enter PSM sleep instead of completely powering off. After that, the system returns to the working state where only the Bluetooth main control chip is used for data collection, so that the system runs in low-power mode most of the time, extending the overall battery life of the device.

[0070] Preferably, the Bluetooth main control chip executes initialization commands on each sensor module in sequence according to a preset order, and configures a polling sampling period and a response interrupt pin logic for the successfully initialized modules; waking up the 4G communication module includes: setting the UART interface to a sendable state, raising the power control pin level, and configuring the internal IO state retention logic of the Bluetooth main control chip.

[0071] An embodiment of the present invention further provides a computer-readable storage medium, on which instructions are stored, which, when executed on a computer, enable the computer to execute the control method of the low-power 4G smart wearable device.

[0072] Those skilled in the art will understand that all or part of the steps in the method for implementing the above-mentioned embodiments can be completed by instructing the relevant hardware through a program, and the program is stored in a storage medium, including several instructions for making a single-chip microcomputer, a chip or a processor (processor) perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk and other media that can store program codes.

[0073] The optional embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the embodiments of the present invention are not limited to the specific details in the above embodiments. Within the technical concept of the embodiments of the present invention, the technical scheme of the embodiments of the present invention can be subjected to a variety of simple modifications, and these simple modifications all belong to the protection scope of the embodiments of the present invention. It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the embodiments of the present invention will not further describe various possible combinations.

[0074] In addition, various embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the embodiments of the present invention, they should also be regarded as the contents disclosed in the embodiments of the present invention.

Claims

1. A low-power 4G smart wearable device, characterized in that: The device comprises: Bluetooth main control chip, multiple sensor modules, 4G communication module, audio circuit, power management module; Wherein, the Bluetooth main control chip is connected to the sensor module to collect physiological parameter data; The 4G communication module is connected to the Bluetooth main control chip via a serial port or an IIS interface; The audio circuit is connected to the Bluetooth main control chip and the 4G communication module respectively; The power management module is connected to the Bluetooth main control chip, the sensor module and the 4G communication module respectively.

2. The device according to claim 1, characterized in that The Bluetooth main control chip includes a first micro control unit and a first storage unit; The first micro control unit is used to execute data acquisition and protocol stack processing programs; The first storage unit is used to cache historical data and abnormal flag information of the sensor module.

3. The device according to claim 1, characterized in that The 4G communication module includes a second micro control unit and a SIM card interface module; The second micro control unit performs serial port communication with the Bluetooth main control chip through an AT instruction set; The SIM card interface module is independently connected to the second micro control unit.

4. The device according to claim 1, characterized in that The audio circuit includes a voice codec, a capacitive coupling circuit and a bias resistor network, and the voice codec has a dual working mode that supports both an analog interface and an IIS interface; The power management module includes a first field effect transistor switch controlled by the Bluetooth main control chip. The first field effect transistor switch is connected in series to the power input end of the 4G communication module and is used to control the on and off state of the 4G communication module.

5. The device according to claim 1, characterized in that The Bluetooth main control chip and the sensor module are connected via a multi-channel I2C bus; The address space of the I2C bus is statically configured by the Bluetooth main control chip, and is configured with a state detection interrupt pin for abnormal event reporting.

6. The device according to claim 1, characterized in that The display module is a graphic display unit based on a TFT driver chip; The Bluetooth main control chip is electrically connected to the display module via an SPI bus and a separate reset control pin; The Bluetooth main control chip is also connected to an EEPROM non-volatile memory for storing historical data thresholds, a PSM wake-up strategy table and a communication event record table.

7. The device according to claim 1, characterized in that The Bluetooth main control chip is provided with an abnormal event processing logic module; The abnormal event processing logic module is used to determine whether an upload request signal is generated, and wake up the 4G communication module through a hardware interrupt when the request is established.

8. A control method for a low-power 4G smart wearable device, characterized in that: The method is applied to the low-power 4G smart wearable device according to any one of claims 1 to 7, and the method comprises: After the Bluetooth main control chip is powered on, multiple sensor modules are initialized and data collection begins; Preprocess and cache the collected data, and determine whether communication needs to be triggered based on preset conditions; If the triggering communication condition is met, the Bluetooth main control chip wakes up the 4G communication module through the serial port or IIS interface; The 4G communication module completes power-on startup and establishes a communication connection for voice or data transmission; After the transmission is completed, the 4G communication module is controlled to enter low power consumption mode.

9. The method according to claim 8, characterized in that The Bluetooth main control chip executes initialization commands to each sensor module in turn according to a preset order, and configures the polling sampling cycle and response interrupt pin logic for the successfully initialized modules; The 4G communication module wakes up: Set the UART interface to a transmittable state, pull up the power control pin level, and configure the internal IO state holding logic of the Bluetooth main control chip.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores instructions, which, when executed on a computer, enable the computer to execute the control method for the low-power 4G smart wearable device described in any one of claims 8 and 9.

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