Bowl support type wireless magnetic charging stimulation device based on brain-computer interface

Abstract

The invention discloses a bowl support type wireless magnetic charging stimulation device based on a brain-computer interface, and aims to solve the problems of frequent sight switching, large cognitive load, unstable fixation, tedious power supply and the like of traditional SSVEP visual stimulation equipment. The device integrates an LCD touch display module and a wireless magnetic charging module, adopts a bowl support structure, can perform visual flickering stimulation and induce SSVEP electroencephalogram signals when a user naturally watches a meal bowl, and provides non-contact power supply for the bowl. According to the design, the dining utensil and the electroencephalogram induction function are ingeniously integrated, the intuition, practicability and portability of brain-computer interface interaction are remarkably improved, and the brain-computer interface interaction system is particularly suitable for users who have upper limb disabilities or depend on visual electroencephalogram interaction and has wide application prospects.

Description

Technical Field

[0001] This disclosure relates to the field of brain-computer interface (BCI) and human-computer interaction technology, particularly to a core auxiliary device for meal-assistance devices that integrates steady-state visual evoked potential (SSVEP) EEG induction capabilities. The device aims to achieve a three-dimensional integration of an LCD touchscreen control module, a wireless magnetic charging system, and a control unit, creating a compact EEG signal induction terminal capable of directly loading a standard meal bowl. Background Art

[0002] With the rapid development of brain-computer interface technology, its application in medical rehabilitation and assistive devices is becoming increasingly widespread. However, for patients with motor dysfunction, the basic need of eating independently still faces huge challenges. Traditional dining-assistance robots rely on physical buttons, voice or gesture control, and have obvious limitations in actual use. Patients with upper limb dysfunction find it difficult to operate physical buttons, noisy environments seriously affect the accuracy of voice recognition, and abnormal muscle tone can lead to gesture recognition failure. These technical bottlenecks make it impossible for most patients with limb disabilities to use existing dining-assistance devices independently, seriously affecting their quality of life. At the same time, there is still a high operating threshold for some users.

[0003] Brain-computer interface (BCI) technology offers a new solution to these problems. By directly analyzing the user's EEG signals and converting them into control commands, BCI technology enables human-computer interaction without relying on physical movement. However, existing BCI-based meal-assistance robot systems often use a flashing computer screen or a single LED area. Users must focus on a specific area on the screen to induce EEG signals. This approach not only restricts the user's natural field of vision but also reduces the intuitiveness and efficiency of the interaction. Faced with these challenges, the development of a novel meal-assistance induction stimulation device is urgent. The system should integrate the stimulation source and food container, support intuitive "what you see is what you get" operation, possess the ability to dynamically adjust stimulation parameters to suit the EEG characteristics of different users, and ensure system stability and security. This will significantly enhance the user experience and help patients with motor dysfunction regain the ability to eat independently, thus having certain social significance. Summary of the Invention

[0004] In order to solve the problems of existing SSVEP visual stimulation devices such as frequent line of sight switching, high cognitive load, unstable fixation and cumbersome power supply, the present invention proposes a bowl-type wireless magnetic charging stimulation device based on brain-computer interface, which integrates a frequency-adjustable LCD flashing display system, a wireless magnetic power supply module and a control unit. It aims to provide users with motor dysfunction with an SSVEP induction platform that is intuitive to interact, wearable, stably powered, easy to clean and convenient to use.

[0005] Specifically, a bowl-holder type wireless magnetic charging stimulation device based on a brain-computer interface comprises a shell that carries a dining bowl, the shell having a bowl-holder structure, the bowl-holder structure being groove-shaped, and the groove matching the bottom of the dining bowl; an LCD touch display module and a wireless magnetic charging module are integrated in the shell; the wireless magnetic charging module is configured to provide contactless wireless power supply to the dining bowl it carries; the LCD touch display module is configured to flash and stimulate when the user naturally looks at the dining bowl, thereby inducing the user to generate SSVEP EEG signals.

[0006] In one embodiment of the above technical solution, the LCD touch display module and the wireless magnetic charging module are connected via a control unit; the control unit is configured to switch the flickering stimulation according to the user's touch operation on the LCD touch display module.

[0007] In one implementation of the above technical solution, the flickering stimulus includes flickering frequency and color.

[0008] In one embodiment of the above technical solution, the wireless magnetic charging module has a built-in magnetic array for magnetic fixation to firmly fix bowls made of various materials.

[0009] In one implementation of the above technical solution, when the tilt angle reaches 30 degrees, the magnetic attraction force of the magnetic fixing ring can still keep the dining bowl stable.

[0010] In one embodiment of the above technical solution, a food-grade anti-slip silicone layer is provided on the bottom of the shell.

[0011] In one embodiment of the above technical solution, the control unit includes a microprocessor and a touch driver chip. The microprocessor has a built-in frequency generation algorithm and color switching program. The touch driver chip is used to identify sliding or clicking operations on the touch screen to adjust the flicker parameters.

[0012] The beneficial technical effects of the present invention are as follows: by integrating an integrated bowl holder structure, an adjustable visual stimulation source and a stable wireless magnetic power supply module, the integration of the EEG induction device and daily dining utensils is realized, which improves the intuitiveness of the interaction of the brain-computer interface system while greatly improving the practicality, portability and adaptability of the equipment. It is particularly suitable for special groups with upper limb dysfunction or who need visual EEG interaction, and has significant promotion value. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0014] Figure 1 Schematic diagram of each module framework.

[0015] Figure 2 Flowchart for system parameter settings. DETAILED DESCRIPTION

[0016] The terms used in the present invention are explained as follows.

[0017] Steady-state visual evoked potentials (SSVEPs) are neural electrical activity in the visual cortex that is synchronized with the stimulus frequency when the visual cortex is subjected to fixed-frequency visual stimulation. This phenomenon manifests as a significant spectral signature of the EEG signal at the fundamental frequency or harmonics of the stimulus frequency, and has been applied to brain-computer interface system design and wearable device development. The prevailing view regarding the mechanism of SSVEP signals is that the various neural networks distributed in the brain have inherent resonant frequencies. Under normal conditions, these networks are asynchronous, chaotic, and irregular, and the EEG signals in these states are spontaneous. When a constant-frequency external visual stimulus is applied, neural networks aligned with the stimulus frequency or its harmonics resonate, causing significant changes in brain potential activity at the stimulus frequency or its harmonics, generating the SSVEP signal. The SSVEP signal manifests itself in the EEG signal as a peak in the power spectrum at the stimulus frequency or its harmonics. By analyzing and detecting the frequency corresponding to this peak, the stimulus source of the subject's visual attention can be detected, thereby identifying the subject's intent.

[0018] The present invention discloses a bowl-type wireless magnetic charging stimulation device based on a brain-computer interface. The device combines SSVEP technology with a structurally optimized intelligent interactive interface design, aiming to provide an accurate, convenient and stable source of visual stimulation for a dining assistance system based on a brain-computer interface.

[0019] The device is mainly used to be placed on scenes such as dinner plates or dining tables. It supports the dinner bowl through a bowl-holder structure and uses the LCD touch display module to generate flashing stimulation of specific frequency, waveform, and color. The user can induce SSVEP EEG signals by naturally looking at the dinner bowl, providing a basis for the subsequent brain-computer interface system to analyze intentions and generate eating instructions. At the same time, it relies on the wireless magnetic charging module to power related equipment such as dinner bowls.

[0020] The following describes in detail, with reference to the accompanying drawings, a bowl-shaped wireless magnetic charging stimulation device for SSVEP (Severe Severe Spinal Electroencephalogram) in accordance with an embodiment of the present invention. Obviously, the embodiments described are only a portion of the embodiments of this case, and not all of them. Based on the embodiments of this case, all other embodiments obtained by persons of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0021] like Figure 1 As shown, a bowl-holder-type wireless magnetic charging stimulation device based on a brain-computer interface according to an embodiment of the present invention includes a housing that supports a meal bowl and a bowl-holder structure. The bowl-holder structure is grooved and matches the bottom of the meal bowl. The groove size precisely matches the bottom diameter of a common standard meal bowl, making it compatible with a variety of bowl materials. The groove area is spatially coaxial with the flashing area of ​​the display screen, allowing the user to complete the SSVEP EEG signal induction task while focusing on the target food. The bottom of the housing is coated with a food-grade non-slip silicone layer.

[0022] The device includes: an LCD touch display module, a control unit and a wireless magnetic charging module.

[0023] The LCD touch display module is configured to generate a flashing area of ​​preset frequency, waveform and color for the user to gaze at to induce SSVEP electroencephalogram (EEG) signals.

[0024] In one embodiment of the present invention, frequency, color, and waveform are used as flicker parameters, and users can customize these parameters via the touchscreen. Once the device is powered on, the control unit initializes and the LCD parameters (frequency, waveform, and color) are set, allowing for flexible adjustment of the flicker parameters to suit individual EEG response characteristics.

[0025] In one embodiment of the present invention, the flashing area is an LCD display screen.

[0026] In one embodiment of the present invention, the LCD touch display module supports a wide-band adjustable stimulation frequency of 5-50 Hz, has an RGBW multi-color mode, and covers real-time switching functions of various stimulation waveforms such as square waves, sine waves, and triangle waves.

[0027] The wireless magnetic charging module is configured under the shell and is used to provide contactless wireless power supply to the relevant meal bowls placed on the device. It can also cooperate with the magnetic fixing ring to stabilize the meal bowl, realize the unification of the stimulation source and the container space, and help users naturally induce EEG signals.

[0028] In one embodiment of the present invention, the wireless magnetic charging module and the LCD touch display module are integrated into the same circular shell structure, specifically arranged below the LCD display screen, forming an integrated structure with an upper screen and a lower screen. A groove for placing the dining bowl is provided in the center of the shell. The diameter of the groove matches the bottom shape of a common dining bowl, and a non-slip silicone layer is provided at the bottom of the groove. The center of the wireless magnetic charging coil is aligned with the center of the groove. The module has a built-in high-efficiency receiving coil and an intelligent power management module, and has the functions of automatically identifying the alignment status of the bowl and adjusting the power output. It wirelessly powers the dining bowl placed in the central groove through contactless magnetic charging, and at the same time, cooperates with the magnetic fixing ring with a built-in magnet array to firmly fix bowls of various materials. When the tilt angle reaches 30°, the magnetic attraction of the magnetic fixing ring can still keep the dining bowl stable.

[0029] The control unit is configured to connect to the LCD touch display module and the wireless magnetic charging module, and is used to receive touch input and switch the flashing frequency, waveform and color in real time according to the user's touch operation.

[0030] In one embodiment of the present invention, the control unit is exquisitely designed and has key functions, and it integrates two core components: a microprocessor and a touch driver chip. The microprocessor has a built-in frequency generation algorithm and a color switching program, and the touch driver chip is used to identify sliding or clicking operations on the touch screen to adjust the flicker parameters. The microprocessor is pre-implanted with a frequency generation algorithm and a color switching program. When it receives the user's touch input, it can respond quickly and switch the flicker frequency, waveform and color of the circular LCD touch display module in real time according to the operating instructions, accurately controlling the output parameters of the visual stimulation to meet the EEG response needs of different users. The touch driver focuses on identifying interactions on the touch screen. Whether it is sliding adjustment or clicking selection, it can accurately capture and convert them into control signals to ensure that the user's interactive instructions are efficiently and accurately transmitted and executed, making the human-computer interaction experience of the entire device smooth and natural.

[0031] like Figure 2 As shown, when the device is started, the control unit immediately starts the initialization process. At this stage, the basic system parameters will be self-checked and the hardware status will be tested to ensure that each module is in a ready state, laying a solid foundation for subsequent operation.

[0032] Next, enter the LCD parameter setting section, where users can flexibly and independently set key parameters such as flashing frequency, waveform and color, laying the foundation for achieving personalized visual stimulation output.

[0033] The wireless magnetic charging module then performs a self-test, testing core functions such as the electromagnetic induction performance of the charging coil and the power supply stability of the power management module to ensure the safety and reliability of the wireless power supply system. After the self-test successfully passes, the system verifies the user's input parameters and deems those that meet the set standards to be valid. Only valid parameters will be saved; otherwise, the user will be required to re-enter the parameters. At this point, the LCD touch display module will generate precise flickering stimuli according to the established parameters, while the wireless magnetic charging module provides a stable and continuous power supply to the bowl. Simply by gazing naturally at the bowl, the user can induce SSVEP EEG signals through the flickering area, completing a complete closed-loop process from device startup to EEG signal induction.

[0034] Although the embodiments of the present disclosure have been described above with reference to the accompanying drawings, the present disclosure is not limited to the specific embodiments and application areas described above. The specific embodiments described above are merely illustrative and instructive, and not restrictive. A person of ordinary skill in the art, guided by this specification and without departing from the scope of protection of the claims of the present disclosure, may devise various other forms, all of which fall within the scope of protection of the present disclosure.

Claims

1. A bowl-type wireless magnetic charging stimulation device based on a brain-computer interface, characterized by: The device includes a shell that supports a meal-assisting bowl, wherein the shell has a bowl-supporting structure, and the bowl-supporting structure is in a groove shape, and the groove matches the bottom of the meal-assisting bowl; The housing integrates an LCD touch display module and a wireless magnetic charging module; The wireless magnetic charging module is configured to provide contactless wireless power to the carried meal bowl; The LCD touch display module is configured to flash and stimulate the user when the user naturally looks at the meal aid bowl, thereby inducing the user to generate an SSVEP electroencephalogram signal.

2. The device according to claim 1, characterized in that: The LCD touch display module and the wireless magnetic charging module are connected via a control unit; The control unit is configured to switch the flickering stimulation according to the user's touch operation on the LCD touch display module.

3. The device according to claim 1, characterized in that The flickering stimulus includes flickering frequency and color.

4. The device according to claim 1, characterized in that: The wireless magnetic charging module has a built-in magnetic array for magnetic fixation to firmly fix bowls made of various materials.

5. The device according to claim 4, characterized in that: When the tilt angle reaches 30 degrees, the magnetic force of the magnetic fixing ring can still keep the dining bowl stable.

6. The device according to claim 1, characterized in that: A food-grade anti-slip silicone layer is provided at the bottom of the shell.

7. The device according to claim 2, characterized in that: The control unit includes a microprocessor and a touch driver chip. The microprocessor has a built-in frequency generation algorithm and a color switching program. The touch driver chip is used to identify sliding or clicking operations on the touch screen to adjust the flicker parameters.

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