Low-energy-consumption control method for wearable assistive device

Abstract

The invention relates to a low-energy-consumption control method for a wearable assistive device. The wearable assistive device comprises a sensor module, a filtering and amplifying module and a wireless communication module. The method comprises the following steps: acquiring battery electric quantity, connecting a sensor and a filtering and amplifying module to supply power when the battery electric quantity is higher than a threshold; the sensor converts physical quantity into electric signals which are processed by the filtering and amplifying module; power supply is cut off after acquisition, the wireless communication module is connected, and data is sent after stabilization; power supply is cut off after sending is completed, dormancy is entered, and repeating is conducted after conditions are met. And the operation main control module controls the on-off of each module according to a preset time sequence to realize time-sharing power supply. According to the method, invalid energy consumption of the high-power-consumption module is reduced, on-demand power supply and dormancy guarantee functions are achieved, waste is reduced, the problem that a traditional auxiliary tool is short in endurance is solved, endurance is prolonged, and long-term use is adapted.

Description

Technical Field

[0001] The present application relates to the technical field of wearable devices, and in particular to a low-energy consumption control method for wearable assistive devices. Background Art

[0002] Due to the slow development of battery technology, battery life has become a key bottleneck for smart assistive devices. Limited battery capacity and insufficient battery life are common. Because assistive devices are worn by patients, they must be minimally sized and weighed to minimize the burden on patients. This results in small device sizes and low battery capacity, making it difficult to support the long-term operation of high-performance hardware. Both sensor modules and communication modules consume significant power during continuous detection and uninterrupted communication, requiring frequent charging and significantly reducing the user experience and functionality. Summary of the Invention

[0003] In view of this, the present application provides a low-energy consumption control method for a wearable assistive device, which controls the operation of various parts of the wearable assistive device. The wearable assistive device is provided with a sensor module for acquiring sensor data; a filtering and amplifying module for processing the signal of the sensor module; and a wireless communication module for signal transmission; The low energy consumption control method of the wearable assistive device includes the following steps: Obtain the battery power. When the battery power is higher than a preset threshold, control the connection between the sensor module and the filter and amplifier module and the battery to start data collection. The sensor module converts the physical quantity into an electrical signal, and the filter and amplifier module processes the electrical signal. After data collection is completed, the control disconnects the sensor module and the filter amplifier module from the battery and stops the power supply; at the same time, the control connects the wireless communication module to the battery, and sends data through the wireless communication module after the connection is stable; After the data is sent, the control disconnects the wireless communication module from the battery and enters a dormant state; After the next round of starting conditions are met, the steps of the aforementioned low-energy consumption control method for all wearable assistive devices are repeated.

[0004] In one possible implementation, controlling the operation of connecting the sensor module, the filtering and amplifying module, and the battery includes: When controlling the connection between the sensor module, the filter amplifier module and the battery, first connect the power supply circuit of the sensor module, and wait until the sensor module is initialized; Then connect the power supply circuit of the filter amplifier module to ensure that the electrical signal output by the sensor module can be processed in time to avoid signal loss.

[0005] In one possible implementation, after data collection is completed, controlling the disconnection of the sensor module and the filter amplification module and connecting the wireless communication module includes: After data collection is completed, the power supply circuit of the sensor module is disconnected first, and after the residual electrical signal is processed, the power supply circuit of the filter amplifier module is disconnected; At the same time, the power supply circuit of the wireless communication module is connected, and the sensor module, the filter amplifier module and the wireless communication module are powered in turn through time intervals.

[0006] In one possible implementation, controlling the operation of connecting the wireless communication module to the battery and sending data includes: After the wireless communication module is connected to the power supply, it needs to detect a stable connection state before starting data transmission; After the data is sent, the signal transmission process is terminated first, and then the time to disconnect the power supply circuit of the wireless communication module is delayed to ensure complete data transmission.

[0007] In one possible implementation, the preset threshold includes: Working threshold: When the battery power is higher than the working threshold, the data acquisition and transmission process is performed at a regular frequency. At this time, the sensor module and the filtering and amplifying module work synchronously, and the filtering and amplifying module processes the electrical signal output by the sensor module in real time; Low battery threshold: When the battery level is between the working threshold and the low battery threshold, the sensor module's acquisition frequency and the wireless communication module's transmission power are automatically reduced. At the same time, the filter amplification module adjusts its working rhythm accordingly as the sensor module's acquisition frequency decreases, and only starts the processing process when the sensor module outputs an electrical signal, thereby reducing ineffective power consumption. Protection threshold: When the power level is lower than the protection threshold, the power supply to the sensor module, the filter amplification module and the wireless communication module is disconnected, and only the core timing and wake-up functions are retained.

[0008] In a possible implementation, entering the dormant state includes: Disconnect the power supply circuits to the sensor module, filter amplifier module, and wireless communication module, leaving only the timing unit and wake-up detection unit running; The timing unit is used to record the sleep duration, and the wake-up detection unit is used to monitor the next round of start-up signals; During the sleep period, the sensor module, filter amplifier module and wireless communication module except the timing and wake-up detection are all in a power-off state.

[0009] In one possible implementation, after the next start condition is met, it includes timed wake-up and external trigger wake-up; The timed wake-up is triggered by the timing unit according to the preset period to start the next round of data collection and transmission. The preset period includes working time and sleep time; Externally triggered wake-up is triggered by detecting the wearer's limb movement signal or external control command, and the wake-up detection unit is triggered to start, and the ratio of working time to sleep time is dynamically adjusted according to the strength of the trigger signal.

[0010] In one possible implementation, the low-energy consumption control method of the wearable assistive device controls the assistive device functions through the low-energy consumption circuit of the wearable assistive device; The low-energy consumption circuit of the wearable assistive device includes a power management module and a main computing control module; There are three power management modules, and each power management module is provided with a switch; The power input terminal of the sensor module, the power input terminal of the filter amplifier module, and the power input terminal of the wireless communication module are electrically connected to the battery through a power management module, and the power supply is connected or disconnected with the battery through the switch in the power management module; The control signal output terminal of the operation main control module is electrically connected to the control input terminal of each power management module to control the switch in the power management module to be connected or disconnected.

[0011] In one possible implementation, the control logic of the switch in the power management module includes: After the main control module sends the first control signal to the switch, the switch remains closed for T time; If the power supply needs to be extended, the main control module needs to repeatedly send the first control signal within each period of T. Otherwise, the switch will automatically disconnect after T time, where T time is the preset single power supply duration.

[0012] In a possible implementation, the main control module dynamically adjusts the working time and the sleeping time. The proportion of time realizes low energy consumption control; Working time is the total duration of data collection, data calculation, and data transmission. Sleep time is the standby time after the main control module stops supplying power to non-essential modules. The ratio of sleep time to working time should not be less than 40:1. When the working time is 6 milliseconds, the corresponding sleep time is 240 milliseconds.

[0013] Beneficial effects of the present invention: The low-energy consumption control method of the wearable assistive device obtains the battery power. When the battery power is higher than a preset threshold, the sensor module and the filter amplifier module are controlled to be connected to the battery to start data acquisition. The sensor module converts the physical quantity into an electrical signal, and the filter amplifier module processes the electrical signal. By first judging whether the battery power meets the preset threshold and then starting data acquisition, it can avoid problems such as unstable power supply and data acquisition distortion caused by forcibly starting a high-power module when the power is insufficient, thereby ensuring the effectiveness and stability of data acquisition. After the data acquisition is completed, the sensor module and the filter amplifier module are controlled to be disconnected from the battery to stop power supply. At the same time, the wireless communication module is controlled to be connected to the battery, and data is sent through the wireless communication module after the connection is stable. This time-sharing power supply strategy between modules can avoid multiple high-power modules working at the same time. The rapid power consumption caused by this significantly reduces the overall energy consumption of the system and extends the battery life; after the data is sent, the control disconnects the connection between the wireless communication module and the battery and enters a dormant state. When no work is required, the power supply of non-essential modules is promptly cut off and the system enters a dormant state, further reducing the standby power consumption and avoiding ineffective waste of energy; after the next round of startup conditions are met, the steps of the aforementioned low-energy consumption control method for all wearable assistive devices are repeated. Through periodic on-demand startup and timely dormancy, dynamic regulation of system energy consumption is achieved. Under the premise of ensuring the normal function of the wearable assistive device, energy consumption is minimized to the greatest extent, solving the problem of traditional smart assistive devices with insufficient battery life and the need for frequent charging due to limited battery capacity. At the same time, there is no need to increase the size and weight of the device to increase the battery capacity, thereby improving the user's wearing experience.

[0014] Other features and aspects of the present application will become apparent from the following detailed description of exemplary embodiments with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate exemplary embodiments, features, and aspects of the application and, together with the description, serve to explain the principles of the application.

[0016] Figure 1 A schematic diagram illustrating a modular architecture of a low-energy consumption circuit of a wearable assistive device according to an embodiment of the present application; Figure 2 A diagram showing the architecture of a low-energy consumption circuit of a wearable assistive device according to an embodiment of the present application; Figure 3 A circuit diagram showing a power management module according to an embodiment of the present application; Figure 4 A flowchart showing the operation timing of the low-energy consumption circuit of the wearable assistive device according to an embodiment of the present application is provided; Figure 5 A diagram showing the relationship between the device operating current and time of the low-energy consumption circuit of the wearable assistive device according to an embodiment of the present application; DETAILED DESCRIPTION Various exemplary embodiments, features, and aspects of the present application will be described in detail below with reference to the accompanying drawings. The same reference numerals in the accompanying drawings represent elements with the same or similar functions. Although various aspects of the embodiments are shown in the accompanying drawings, the drawings are not necessarily drawn to scale unless otherwise indicated.

[0017] It should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application or simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0018] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0019] The word “exemplary” is used exclusively herein to mean “serving as an example, example, or illustration.” Any embodiment described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other embodiments.

[0020] In addition, numerous specific details are provided in the detailed description below to better illustrate the present application. Those skilled in the art will appreciate that the present application can be practiced without certain specific details. In some instances, methods, means, components, and circuits well known to those skilled in the art are not described in detail in order to highlight the main purpose of the present application.

[0021] The low-energy consumption control method of the wearable assistive device of the present application is an energy consumption optimization solution that realizes time-sharing power supply of each functional module through an independent power management module and combines the sleep and wake-up logic of the computing main control module. When applied in the field of wearable devices, it can ensure the stability of data acquisition, signal processing and communication functions while greatly reducing the energy consumption of the equipment, improving the battery life, reducing the charging frequency, and not increasing the weight of the equipment.

[0022] Specific reference Figure 1-Figure 5As a specific embodiment of a low-energy control method for a wearable assistive device according to the present application, this method controls the operation of various components of the wearable assistive device. The wearable assistive device is provided with a sensor module 130 for acquiring sensor data; a filter and amplification module 140 for processing the signals from the sensor module 130; and a wireless communication module 150 for signal transmission. This embodiment clarifies the core functional module structure of the wearable assistive device, which is the hardware foundation for implementing the low-energy control method. The sensor module 130 is responsible for converting physical quantities such as the wearer's limb movement and pressure into electrical signals and is the source of data acquisition. The filter and amplification module 140 processes the weak electrical signals output by the sensor, removes environmental interference and clutter, and amplifies the valid signal to ensure the accuracy of subsequent data processing. The wireless communication module 150 is responsible for data transmission, sending the processed sensor data to an external device. These three modules are the main energy-consuming units in the system, and their coordinated timing and power supply control are key to low-energy design.

[0023] The low energy consumption control method of the wearable assistive device includes the following steps: The power level of the battery 160 is obtained. When the power level of the battery 160 is higher than the preset threshold, the sensor module 130 and the filter amplification module 140 are connected to the battery 160 to start data acquisition. The sensor module 130 converts the physical quantity into an electrical signal, and the filter amplification module 140 processes the electrical signal. This step is the starting link of low-energy consumption control and reflects the core idea of ​​"power supply on demand". By first obtaining the power level of the battery 160 and comparing it with the preset threshold, it is possible to avoid starting a high-power module when the power is insufficient. If the power level is lower than the threshold, forced power supply may cause a decrease in sensor acquisition accuracy, abnormal parameters of the filter amplification module 140, or even damage the module. When the power level meets the conditions, only the sensor module 130 and the filter amplification module 140 are powered and data acquisition is started to ensure that the acquisition and processing of core data are completed first under the premise of controllable energy consumption, providing reliable original signals for subsequent transmission.

[0024] Further, such as Figure 1 、 Figure 2 and Figure 3 As shown, the main computing control module 120 acquires power information and compares it with a preset threshold. When the conditions are met, the main computing control module 120 controls the sensor power management module 111 and the filter and amplification power management module 112 to connect the battery 160 to the corresponding sensor module 130 and filter and amplification module 140. When the sensor is operating, it converts physical quantities into weak electrical signals. The filter and amplification module 140 uses an operational amplifier (IC) to filter and amplify the signal, preparing it for subsequent processing and ensuring the validity of the acquired signal. This step is fundamental to data acquisition and ensures the quality of the original information.

[0025] After data collection is completed, the control disconnects the sensor module 130 and the filter amplification module 140 from the battery 160 and stops supplying power. At the same time, the control connects the wireless communication module 150 to the battery 160, and sends data through the wireless communication module 150 after the connection is stable. This step optimizes energy consumption through "time-sharing power supply" and is one of the core links of low-energy control. The sensor module 130 and the filter amplification module 140 are immediately powered off after data collection is completed to avoid ineffective energy consumption when they are idle. At the same time, only power is supplied to the wireless communication module 150 to focus on data transmission tasks. This power supply switching strategy between modules can avoid the problems of excessive current peaks and rapid power consumption caused by multiple high-power modules working at the same time. In addition, the design of "sending data after the connection is stable" can reduce the energy consumption of repeated transmissions caused by unstable connections, further improving efficiency.

[0026] Further, such as Figure 1 、 Figure 4 and Figure 5 As shown, after data acquisition is completed, the main control module 120 sends a command to disconnect the power supply of the sensor module 130 and the filter and amplifier module 140, which correspond to the sensor power management module 111 and the filter and amplifier power management module 112, to avoid idle power consumption. At the same time, the wireless communication power management module 113 corresponding to the wireless communication module 150 is controlled to connect to the battery 160. After the wireless communication module 150 is started, it needs to establish a stable connection with the external device. After the connection is stable, the valid data after filtering and amplification is sent out. This time-sharing power supply can avoid high power consumption of multiple modules at the same time, reduce energy consumption, and ensure reliable data transmission.

[0027] After data transmission is complete, the control disconnects wireless communication module 150 from battery 160, entering a dormant state. This step is crucial for reducing standby power consumption. After data transmission is complete, wireless communication module 150 no longer needs to operate, and disconnecting its power supply at this point prevents continued power consumption. The "dormant state" design ensures that the system retains only the minimum functionality required to maintain the next startup cycle, while all other non-essential modules cease operation, minimizing energy consumption during the dormant period. This clear transition between active and dormant mode effectively addresses the power waste associated with traditional assistive devices caused by the modules remaining in standby mode, reducing energy losses.

[0028] Further, such as Figure 1 、 Figure 4 and Figure 5 As shown, after data transmission is complete, the main computing control module 120 controls the wireless communication module 150's corresponding wireless communication power management module 113 to disconnect power, and the wearable assistive device system enters sleep mode. During sleep mode, all modules except the ultra-low-power units responsible for maintaining wake-up and timing are powered down, significantly reducing standby power consumption. The current in sleep mode approaches zero, resolving the rapid standby power consumption issue of traditional devices and extending battery life.

[0029] After the next round of startup conditions are met, the steps of the aforementioned low-energy control method for all wearable assistive devices are repeated. This step reflects the periodicity and dynamic adaptability of low-energy control. By presetting the startup conditions, the system can flexibly adjust the operating frequency according to actual needs. For example, when the wearer is active, the sleep time is shortened to ensure real-time data, and when the wearer is stationary, the sleep time is extended to save power. This cyclic execution mechanism ensures that the wearable assistive device continues to function, and achieves maximum energy consumption reduction by precisely controlling the operating time, ultimately resolving the contradiction between the limited capacity of the battery 160 and the endurance requirement.

[0030] Further, such as Figure 4 and Figure 5 As shown, the activation condition can be timed or event-triggered. Once the condition is met, the main control module 120 repeats the process, first checking the power level, starting data collection, then transmitting data, and then going into sleep mode, forming a cycle. This dynamic cycle allows the wearable assistive device system to operate on demand, ensuring the wearable assistive device's data collection and transmission functions. By alternating between operation and sleep, it minimizes energy consumption, adapts to the capacity limitations of the battery 160, and improves the user experience, eliminating the need for frequent charging and eliminating the need to sacrifice portability by enlarging the battery 160.

[0031] Furthermore, wearable assistive devices are medical rehabilitation devices that are directly worn on the limbs, torso and other parts of the body, mainly including orthotics, rehabilitation braces, prostheses and walking aids. Wearable assistive devices act directly on the parts of the human body with functional impairment, with medical rehabilitation and functional compensation as the primary purpose. This application is different from smart watches and other consumer electronic devices whose main functions are health monitoring and life assistance. The sensor modules carried in wearable assistive devices are used to monitor human characteristics that are directly related to limb function, movement status and rehabilitation effect, which specifically include kinematic characteristics, mechanical characteristics, physiological electrical characteristics and posture characteristics. These characteristic monitoring directly serves the realization of the assistive device's functions, and is essentially different from general health data such as heart rate and step count monitored by smart watches and other devices.

[0032] Furthermore, this application is designed to meet the special needs of wearable assistive devices, such as the need to accurately capture signals in high-frequency dynamic motion scenarios, the need for extremely small battery capacity due to size and weight limitations, and the need to ensure medical-grade functional reliability. The control logic dynamically adjusts the working timing based on the laws of human movement, which is completely different from the timing sampling mode and functional requirements of smart watches, and is therefore not affected by existing technologies of consumer electronic devices.

[0033] In one possible implementation, controlling the connection between the sensor module 130, the filter-amplifier module 140, and the battery 160 includes: first connecting the sensor module 130's power supply circuit when controlling the connection between the sensor module 130, the filter-amplifier module 140, and the battery 160; then connecting the filter-amplifier module 140's power supply circuit after the sensor module 130 completes initialization, ensuring that the electrical signal output by the sensor module 130 can be processed promptly and avoiding signal loss. The wearable assistive device system first sends a power supply signal to the sensor power management module 111 corresponding to the sensor module 130 to connect its power supply circuit. After power is applied to the sensor module 130, initialization begins. This process completes internal circuit preheating, parameter calibration, and other operations, typically taking 5-10 milliseconds. After the sensor module 130 completes initialization and sends a ready signal, the system then sends a power supply signal to the filter-amplifier power management module 112 corresponding to the filter-amplifier module 140 to connect its power supply circuit. Therefore, when the sensor module 130 starts to output electrical signals, the filtering and amplifying module 140 is already in working state and can process the signals in time, thereby effectively avoiding the signal loss problem caused by the delayed startup of the filtering and amplifying module 140.

[0034] In one possible implementation, after data collection is complete, the sensor module 130 and the filter-amplifier module 140 are disconnected, and the wireless communication module 150 is connected. This includes disconnecting the sensor module 130's power supply circuit after data collection is complete. After residual electrical signals are processed, the filter-amplifier module 140's power supply circuit is disconnected, while the wireless communication module 150's power supply circuit is connected. This alternates power supply to the sensor module 130, the filter-amplifier module 140, and the wireless communication module 150 at timed intervals. After data collection is complete, the wearable assistive device system first sends a power-off signal to the sensor power management module 111 corresponding to the sensor module 130, disconnecting its power supply circuit. At this point, the sensor module 130 stops outputting new electrical signals, but unprocessed electrical signals may remain in the filter-amplifier module 140. These residual signals are processed by the filter-amplifier module 140 within 1-2 milliseconds. The wearable assistive device system then disconnects the power supply circuit to the filter-amplifier power management module 112 corresponding to the filter-amplifier module 140. At the same time, the wearable assistive device system sends a power signal to the wireless communication power management module 113 corresponding to the wireless communication module 150, connecting its power supply circuit. This sequential control, which sequentially disconnects power to the sensor module 130 and the filter and amplifier module 140 while simultaneously connecting power to the wireless communication module 150, allows for alternating power supply between the three modules, preventing multiple modules from consuming power simultaneously and significantly reducing energy consumption.

[0035] In one possible implementation, controlling the connection between the wireless communication module 150 and the battery 160 and transmitting data includes: after the wireless communication module 150 is connected to power, it must detect a stable connection before initiating data transmission. After data transmission is complete, the signal transmission process is terminated, and then the time to disconnect the wireless communication module 150's power circuit is delayed to ensure complete data transmission. When controlling the connection between the wireless communication module 150 and the battery 160 and transmitting data, after the wireless communication module 150 is powered on, it first performs a network search and connection establishment operation. During this process, the wireless communication module 150 continuously checks the connection strength and stability with the receiving end. Only when the connection strength reaches a preset threshold and is stable for three consecutive times is the connection determined to be stable. At this point, the wireless communication module 150 sends a connection stability signal to the system, and the wearable assistive device system immediately initiates the data transmission process. After data transmission is complete, the wireless communication module 150 first terminates the signal transmission process to ensure that all data frames have been sent, and then delays its power circuit for 50-100 milliseconds before disconnecting. This delay operation avoids data transmission interruptions caused by immediate power outages, ensuring the integrity of data transmission.

[0036] In one possible implementation, the preset thresholds include: a working threshold: when the battery 160 power level is higher than the working threshold, the data acquisition and transmission process is performed at a regular frequency, at which time the sensor module 130 and the filter amplification module 140 work synchronously, and the filter amplification module 140 processes the electrical signal output by the sensor module 130 in real time; a low power threshold: when the power level is between the working threshold and the low power threshold, the acquisition frequency of the sensor module 130 and the transmission power of the wireless communication module 150 are automatically reduced, and the filter amplification module 140 operates synchronously with the sensor module 130. The working rhythm is adjusted accordingly with the reduction of the acquisition frequency of 130. The processing process is started only when the sensor module 130 outputs an electrical signal to reduce invalid power consumption. The protection threshold is: when the power is lower than the protection threshold, the power supply to the sensor module 130, the filtering and amplifying module 140 and the wireless communication module 150 is disconnected, and only the core timing and wake-up functions are retained. The working threshold is set to 30% of the total capacity of the battery 160. When the power of the battery 160 is higher than 30%, the system operates at a normal frequency. The sensor module 130 collects physical quantities such as limb movements at a frequency of 100Hz and converts them into electrical signals. The filtering and amplifying module 140 is used to collect physical quantities such as limb movements and converts them into electrical signals. The module 140 works synchronously with the sensor module 130, receives the electrical signal output by the sensor module 130 in real time, and immediately performs filtering and signal amplification processing to ensure the signal quality before transmitting it to the subsequent links. At the same time, the wireless communication module 150 sends the processed data to the terminal device at a frequency of 50Hz in the 2.4GHz frequency band and 10dBm transmission power; the low power threshold is set to 15% of the total capacity of the battery 160. When the power is between 15% and 30%, the acquisition frequency of the sensor module 130 is automatically reduced to 50Hz, the transmission power of the wireless communication module 150 is reduced to 5dBm, and the filtering and amplification Module 140 adjusts its working rhythm accordingly, starting only at the moment the sensor module 130 outputs an electrical signal. After completing the filtering and amplification of the signal, it enters the standby state and no longer maintains continuous operation, thereby reducing invalid power consumption; the protection threshold is set to 5% of the total capacity of the battery 160. When the power is lower than 5%, the system triggers the protection mechanism and immediately disconnects the power supply circuits of the sensor module 130, the filtering and amplifying module 140 and the wireless communication module 150, leaving only the core timing unit composed of the low-power clock chip and the wake-up detection unit based on the acceleration sensor to operate, maintaining minimum energy consumption to wait for the wake-up signal.

[0037] In one possible implementation, entering a dormant state involves disconnecting the power supply circuits to the sensor module 130, the filter-amplifier module 140, and the wireless communication module 150, leaving only the timing unit and the wake-up detection unit operational. The timing unit is used to record the dormant duration, and the wake-up detection unit is used to monitor for the next activation signal. During the dormant state, all components of the sensor module 130, the filter-amplifier module 140, and the wireless communication module 150, except for the timing and wake-up detection functions, are powered off. Upon entering the dormant state, the system sends a power-off signal to the power management module 110 corresponding to each of the sensor module 130, the filter-amplifier module 140, and the wireless communication module 150, disconnecting their power circuits. At this point, only the timing unit and the wake-up detection unit remain operational. The timing unit uses a low-power real-time clock chip to record the dormant duration in seconds, consuming only 1-2 microamperes of operating current. The wake-up detection unit uses a low-power motion sensor to monitor the wearer's body movements and triggers a wake-up operation when a motion signal is detected. During the entire dormancy period, the sensor module 130 , the filtering and amplifying module 140 , and the wireless communication module 150 are all in a completely power-off state, and no additional energy consumption is generated.

[0038] In one possible implementation, when the next start condition is met, it can be triggered by either a timed wakeup or an externally triggered wakeup. Timed wakeup is triggered by a timing unit at a preset period, initiating the next round of data collection and transmission. The preset period consists of an operating time and a sleep time. Externally triggered wakeup is triggered by the wakeup detection unit upon detecting a limb motion signal from the wearer or an external control command. The ratio of the operating time to the sleep time is dynamically adjusted based on the strength of the trigger signal. Timed wakeup is triggered by the timing unit at a preset period, consisting of 6 milliseconds of operating time and 240 milliseconds of sleep time. That means a timed wakeup is triggered every 246 milliseconds, initiating the next round of data collection and transmission. During externally triggered wakeup, the wakeup detection unit detects the wearer's limb motion signals using a built-in accelerometer. When the detected acceleration exceeds a preset threshold, wakeup is immediately triggered. The system also dynamically adjusts the operating time to sleep time ratio based on the strength of the trigger signal. For example, when a strong activity signal is detected, the ratio is adjusted to 20:1, meaning 6 milliseconds of operating time and 120 milliseconds of sleep time; when a mild activity signal is detected, the ratio is adjusted to 30:1.

[0039] In one possible implementation, a low-energy control method for a wearable assistive device controls assistive device functions through a low-energy circuit of the wearable assistive device. The low-energy circuit of the wearable assistive device includes a power management module 110 and a main computing control module 120. There are three power management modules 110, and each power management module 110 is provided with a switch (S). The power input end of the sensor module 130, the power input end of the filter and amplification module 140, and the power input end of the wireless communication module 150 are respectively electrically connected to the battery 160 through one power management module 110. The power supply is connected or disconnected with the battery 160 through the switch (S) in the power management module 110. The control signal output end of the main computing control module 120 is electrically connected to the control input end of each power management module 110 to control the connection or disconnection of the switch (S) in the power management module 110. The power management module 110 uses a dedicated low-power power management chip. The three power management modules 110 correspond to the sensor module 130, the filter and amplification module 140, and the wireless communication module 150, respectively. Each power management module 110 is equipped with a switch (S) with an on-resistance of less than 10 milliohms to reduce energy loss during power supply. The power input of the sensor module 130 is connected to the battery 160 via the sensor power management module 111. The power input of the filter and amplifier module 140 is connected to the battery 160 via the filter and amplifier power management module 112. The power input of the wireless communication module 150 is connected to the battery 160 via the wireless communication power management module 113110. The main computing control module 120 utilizes a low-power microcontroller. Its control signal output is connected to the control inputs of the three power management modules 110 via a GPIO interface. It controls the connection and disconnection of the switches (S) in the corresponding power management modules 110 by outputting high and low level signals.

[0040] In one possible implementation, the control logic for the switch (S) in the power management module 110 includes the following: after the computing main control module 120 sends a first control signal to the switch (S), the switch (S) remains closed for a time period T. If power supply needs to be extended, the computing main control module 120 must repeatedly send the first control signal within each time period T; otherwise, the switch (S) automatically opens after the expiration of time T, where time T is a preset single power supply duration. The first control signal sent by the computing main control module 120 to the switch (S) is a high-level signal lasting 100 microseconds. Upon receiving this high-level signal, the switch (S) remains closed for a time period T, where time T is preset to 5 milliseconds. If the computing main control module 120 needs to extend the power supply to the corresponding module, it must repeatedly send a 100-microsecond high-level signal within each 5-millisecond period. If this signal is not received within a 5-millisecond period, the switch (S) automatically opens after the expiration of that period, stopping power supply.

[0041] Further, in the wearable assistive device, through preset threshold grading and dynamic matching with the single - power - supply duration T of the module, low - energy - consumption control of the sensor module 130, the filtering and amplification module 140, and the wireless communication module 150 for power - supply rotation is achieved. The battery 160 power thresholds are set as the working threshold Q1 = 30%, the low - power threshold Q2 = 15%, and the protection threshold Q3 = 5%. The basic power - supply durations are preset for the sensor module 130, the filtering and amplification module 140, and the wireless communication module 150: the power - supply duration Ts of the sensor module 130 is 2 ms, the power - supply duration Tf of the filtering and amplification module 140 is 1 ms, and the power - supply duration Tw of the wireless communication module 150 is 2 ms.

[0042] When the power Q > Q1, the wearable assistive device system operates in the high - frequency mode. First, the sensor module 130 is powered for Ts = 6 ms to complete the physical quantity acquisition and output an electrical signal. After a 1 - ms delay, the filtering and amplification module 140 is powered for Tf = 4 ms to synchronously process the currently acquired signal. The power supply to the sensor module 130 is disconnected 2 ms after the filtering module starts. Immediately after the filtering module is powered off, the wireless communication module 150 is powered for Tw = 5 ms to send the processed data. During this period, the control signal needs to be repeatedly sent every Tw / 2 = 2.5 ms to maintain the power supply. The total time for the three modules to work in rotation is 6 + 4 + 5 = 15 ms, and then it enters a 600 - ms sleep to complete one cycle.

[0043] When Q2 ≤ Q ≤ Q1, the system switches to the energy - saving mode: the power - supply duration of the sensor module 130 is shortened to Ts = 4 ms, the filtering and amplification module 140 is synchronously shortened to Tf = 3 ms, and the wireless communication module 150 is shortened to Tw = 3 ms. The power - supply rotation sequence remains unchanged, but the sleep time is extended to 800 ms to reduce the total energy consumption by reducing the number of operations per unit time.

[0044] When Q < Q3, the protection mechanism is triggered: the power supply to the three modules stops, and only the timing and wake - up unit remains. If an external wake - up signal is detected and the power increases back to Q > Q2, the power - supply rotation resumes in the low - power mode. At this time, the T time of each module needs to be increased by 2 ms based on the basic value. Wait until the power increases back to Q > Q1 and then resume the high - frequency mode parameters.

[0045] Further, as Figure 1 and Figure 3As shown, the power supply control method is that each time the main control sends a set of signals to the switch (S) (S), the power management module 110 where the switch (S) is located will continue to supply power for T time. If no signal is sent, the output will be terminated. That is, after the first control output signal is sent, a set of signals must be repeatedly sent each time within T time. The power management module 110 includes a first resistor (R1), a second resistor (R2), a third resistor (R3), a fourth resistor (R4), a first capacitor (C1), a second capacitor (C2), a first diode (VD1), a second diode (VD2), a switch (S), and an operational amplifier (IC). The operational amplifier (IC) has a non-inverting input terminal electrically connected to one end of the second resistor (R2) and one end of the switch (S), an inverting input terminal electrically connected to one end of the first capacitor (C1), one end of the second capacitor (C2), and one end of the third resistor (R3). The output terminal is connected to one end of the first resistor (R1), the other end of the third resistor (R3), and the cathode of the first diode (VD1). The cathode of the second diode (VD2) is electrically connected to the other end of the second resistor (R2). When the switch (S) is closed, the anode connects to one end of the second resistor (R2), forming a parallel connection with the second resistor (R2). The anode of the first diode (VD1) is connected to one end of the third resistor (R3), and the cathode is connected to the other end of the third resistor (R3), forming a parallel connection with the third resistor (R3). One end of the fourth resistor (R4) is electrically connected to the other end of the first capacitor (C1), and one end of the second resistor (R2) is electrically connected to the other end of the first resistor (R1), forming a series connection. Through this component connection, the various components work together, utilizing the amplification and feedback characteristics of the operational amplifier (IC), combined with the filtering and voltage division functions of the resistors and capacitors, and the unidirectional conduction protection functions of the diode, to construct a power management module 110 circuit that can implement specific power supply control logic, providing hardware support for low-energy operation of wearable assistive devices.

[0046] In one possible implementation, the computing main control module 120 achieves low energy consumption by dynamically adjusting the ratio of working time to sleep time. Working time is the total duration of data acquisition, data calculation, and data transmission, while sleep time is the duration of standby time after the computing main control module 120 stops powering non-essential modules. The ratio of sleep time to working time is no less than 40:1. For a working time of 6 milliseconds, the corresponding sleep time is 240 milliseconds. Working time includes the total time for data acquisition, data calculation, and data transmission. Actual testing shows that data acquisition takes 2 milliseconds, data calculation takes 1 millisecond, and data transmission takes 3 milliseconds, resulting in a total working time of 6 milliseconds. Sleep time is the duration of standby time after the computing main control module 120 stops powering the sensor module 130, the filter and amplification module 140, and the wireless communication module 150. The system defaults to a 40:1 ratio of sleep time to working time, meaning that for a working time of 6 milliseconds, the corresponding sleep time is 240 milliseconds. At the same time, the main control module 120 will dynamically adjust the ratio according to the power of the battery 160 and the wearer's activity. For example, when the power is low, the ratio will be increased to 50:1, and when the wearer is active, it will be reduced to 30:1.

[0047] Further, such as Figure 4 and Figure 5 As shown, the computing controller in the device system must operate in real time and must not be interrupted, otherwise it will cause a system restart and operational chaos. This system uses a strategy where the computing controller is put into sleep at intervals, while other modules take turns providing power to achieve low energy consumption. A specific implementation involves waking up the computing controller, activating its internal data acquisition function, and controlling the battery 160 and power management module 110 to power the sensors and the filter and amplification module 140. Once the system stabilizes, data acquisition and sensor data calculation begin. After data acquisition is complete, the battery 160 and power management module 110 are disconnected from the sensors and filter and amplification module 140, powering the wireless communication module 150. The control module then initiates a request to establish a wireless communication connection, transmitting sensor data once the connection is stable. By adjusting the ratio of acquisition time, calculation time, transmission time (collectively referred to as working time), and sleep time, the system's energy consumption characteristics can be significantly modified. Without affecting the wearable experience, the sleep time can be 40 times the working time, with 6 milliseconds of working time followed by 240 milliseconds of sleep time, significantly improving the device's battery life.

[0048] Furthermore, the wearable assistive device system mainly includes an operation main control module 120, a sensor module 130, a filter amplifier module 140, a wireless communication module 150, a battery 160 and a power management module 110. The operation main control module 120 is mainly responsible for sensor acquisition control, filter amplifier control, wireless communication control, power management strategy control, and is the signal control center of the system and a key part of power scheduling calculation; the sensor module 130 mainly converts physical quantities into electrical signals and outputs them to the filter amplifier module 140. The sensor module is the main power-consuming module and has high requirements for power supply, which is mainly reflected in the instantaneous current impact. If the power supply cannot provide enough explosive instantaneous current, it will affect the acquisition accuracy and acquisition frequency; the filter amplifier module 1 40 filters the primary signal of the sensor module 130, removes interference and parasitic clutter, and then intercepts the effective signal for amplification and transmission to the main operation control for further processing. When the power supply is lower than a specific threshold, the amplification parameters will be seriously affected or even lose the amplification function, and the loss of amplification function will cause the device to lose its meaning; the wireless communication module 150 transmits the sensor data that has been filtered, amplified and calculated. When the power supply is lower than a specific threshold, the connection quality of the wireless communication will begin to decline or even lose the communication function; the battery 160\power management module 110 provides power for the entire system, converting the electrical energy of the battery 160 into energy that meets the standards of each module. This function can only be achieved when the power of the battery 160 is higher than a certain threshold, and is responsible for partially or completely losing the system power.

[0049] The low-energy consumption control method for a wearable assistive device of the present invention accurately controls the power supply rotation of the sensor module, the filtering and amplifying module, and the wireless communication module, and dynamically adjusts the ratio of working and sleeping time according to different battery power states. This significantly reduces system energy consumption while ensuring the normal function of the wearable assistive device, solves the problem of insufficient battery life caused by limited battery capacity, and avoids the additional burden on users due to increased battery size and weight, thereby improving the device usage experience.

[0050] The embodiments of the present application have been described above. The above description is illustrative and not exhaustive, and is not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is selected to best explain the principles of the embodiments, their practical applications, or improvements to the technology in the market, or to enable other persons skilled in the art to understand the embodiments disclosed herein.

Claims

1. A low-energy consumption control method for a wearable assistive device, which controls the operation of various parts of the wearable assistive device, characterized in that: The wearable assistive device is provided with a sensor module for acquiring sensor data; a filtering and amplifying module for processing the signal of the sensor module; and a wireless communication module for signal transmission; The low energy consumption control method of the wearable assistive device comprises the following steps: obtaining the battery power level, and when the battery power level is higher than a preset threshold, controlling the connection between the sensor module and the filter and amplification module and the battery to start data acquisition; the sensor module converts the physical quantity into an electrical signal, and the filter and amplification module processes the electrical signal; After data collection is completed, the sensor module and the filter amplification module are disconnected from the battery to stop power supply; at the same time, the wireless communication module is connected to the battery, and data is sent through the wireless communication module after the connection is stable; After the data transmission is completed, the control disconnects the wireless communication module from the battery and enters a dormant state; After the next round of starting conditions are met, the steps of the aforementioned low-energy consumption control method for all wearable assistive devices are repeated.

2. The low energy consumption control method of the wearable assistive device according to claim 1, characterized in that: The control of connecting the sensor module, the filter amplification module and the battery includes: When controlling the connection between the sensor module and the filter amplifier module and the battery, the power supply circuit of the sensor module is first connected, and after the sensor module is initialized; Then connect the power supply circuit of the filtering and amplifying module to ensure that the electrical signal output by the sensor module can be processed in time to avoid signal loss.

3. The low energy consumption control method of the wearable assistive device according to claim 1, characterized in that: After the data acquisition is completed, the operation of controlling the disconnection of the sensor module and the filter amplification module and connecting the wireless communication module includes: After the data acquisition is completed, the power supply circuit of the sensor module is disconnected first, and after the residual electrical signal is processed, the power supply circuit of the filtering and amplifying module is disconnected; At the same time, the power supply circuit of the wireless communication module is connected, and power is supplied to the sensor module, the filtering and amplifying module and the wireless communication module in turn through time intervals.

4. The low energy consumption control method of a wearable assistive device according to claim 1, characterized in that: The operation of controlling the connection between the wireless communication module and the battery and sending data includes: after the wireless communication module is connected to the power supply, it needs to detect a stable connection state before starting data transmission; After the data is sent, the signal transmission process is terminated first, and then the time to disconnect the power supply circuit of the wireless communication module is delayed to ensure complete data transmission.

5. The low energy consumption control method of a wearable assistive device according to claim 1, characterized in that: The preset thresholds include: Working threshold: When the battery power is higher than the working threshold, the data acquisition and transmission process is performed at a regular frequency. At this time, the sensor module and the filtering and amplifying module work synchronously, and the filtering and amplifying module processes the electrical signal output by the sensor module in real time; Low battery threshold: When the battery level is between the working threshold and the low battery threshold, the sensor module's acquisition frequency and the wireless communication module's transmission power are automatically reduced. At the same time, the filter amplification module adjusts its working rhythm accordingly as the sensor module's acquisition frequency decreases, and only starts the processing process when the sensor module outputs an electrical signal, thereby reducing ineffective power consumption. Protection threshold: When the power level is lower than the protection threshold, the power supply to the sensor module, the filter amplification module and the wireless communication module is disconnected, and only the core timing and wake-up functions are retained.

6. The low energy consumption control method of a wearable assistive device according to claim 1, characterized in that: The step of entering the dormant state includes: Disconnect the power supply circuits to the sensor module, the filter amplification module, and the wireless communication module, leaving only the timing unit and the wake-up detection unit running; The timing unit is used to record the sleep duration, and the wake-up detection unit is used to monitor the next round of start-up signals; During the dormant period, the sensor module, the filtering and amplifying module, and the wireless communication module, except for the timing and wake-up detection modules, are all in a power-off state.

7. The low energy consumption control method of the wearable assistive device according to claim 6, characterized in that: After the next start condition is reached, it includes timed wake-up and external trigger wake-up; The timed wake-up is triggered by the timing unit according to a preset period to start the next round of data collection and transmission. The preset period includes working time and sleep time; The external trigger awakening is triggered by the awakening detection unit when a wearer's limb movement signal or an external control instruction is detected, and the ratio of working time to sleep time is dynamically adjusted according to the trigger signal strength.

8. The low energy consumption control method for a wearable assistive device according to claim 7, characterized in that: The low-energy consumption control method of the wearable assistive device controls the assistive device functions through the low-energy consumption circuit of the wearable assistive device; The low-energy consumption circuit of the wearable assistive device includes a power management module and a main computing control module; The number of power management modules is 3, and each power management module is provided with a switch; The power input end of the sensor module, the power input end of the filter amplifier module, and the power input end of the wireless communication module are electrically connected to the battery through one of the power management modules, and are connected or disconnected with the battery for power supply through a switch in the power management module; The control signal output terminal of the operation main control module is electrically connected to the control input terminal of each power management module to control the switch in the power management module to be connected or disconnected.

9. The low energy consumption control method of the wearable assistive device according to claim 8, characterized in that: The control logic of the switch in the power management module includes: After the main control module sends the first control signal to the switch, the switch remains closed for T time; If the power supply needs to be extended, the main control module needs to repeatedly send the first control signal within each period of T. Otherwise, the switch will automatically disconnect after T time, where T time is the preset single power supply duration.

10. The low energy consumption control method of a wearable assistive device according to claim 8, characterized in that: The main control module achieves low energy consumption control by dynamically adjusting the ratio of working time to sleeping time; The working time is the total duration of data collection, data calculation and data transmission, and the sleep time is the standby time after the main control module stops supplying power to non-essential modules; wherein the ratio of the sleep time to the working time is not less than 40:1; When the working time is 6 milliseconds, the corresponding sleep time is 240 milliseconds.

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