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CN-122006107-A - Electrical stimulation method and system based on electroencephalogram closed-loop intervention

CN122006107ACN 122006107 ACN122006107 ACN 122006107ACN-122006107-A

Abstract

The invention provides an electrical stimulation method and system based on electroencephalogram closed-loop intervention, wherein the method comprises the following steps of S1, wearing self-checking and contact quality optimization, S2, real-time electroencephalogram signal acquisition and feature extraction, S3, brain state judgment and stimulation parameter dynamic decision, S4, self-adaptive electrical stimulation application, and S5, closed-loop feedback and iterative optimization. The invention integrates the electroencephalogram acquisition, signal processing, state identification, electric stimulation generation, man-machine interaction and the like into one portable wearable device, realizes the one-stop completion of closed-loop intervention, has low user operation threshold and is convenient for popularization and use.

Inventors

  • LAN WEIJIE

Assignees

  • 厦门狄耐克智能科技股份有限公司

Dates

Publication Date
20260512
Application Date
20260213

Claims (7)

  1. 1. An electrical stimulation method based on electroencephalogram closed-loop intervention is characterized by comprising the following steps: s1, wearing self-checking and contact quality optimization: After the user wears the head-loop type equipment, the head-loop type equipment starts a wearing self-checking program, a plurality of electroencephalogram acquisition electrodes (310) positioned at the tail ends of flexible arms of the bilateral temporal areas of the head-loop type equipment start to detect contact impedance with scalp skin, the head-loop type equipment displays colors in real time according to the impedance value of each electrode point through a contact quality indicator lamp, and the user can intuitively fine-tune the angle of the flexible arms of the bilateral temporal areas or the tightness of a back pillow fixing band (400) according to the indication of the contact quality indicator lamp until all or key electrode point indicator lamps turn green; s2, acquiring and extracting characteristics of the brain signals in real time: In the electrical stimulation intervention process, continuously and synchronously acquiring real-time brain electrical signals of a user by the head ring type equipment through the plurality of brain electrical acquisition electrodes (310), preprocessing the acquired original brain electrical signals by a signal processing module of the head ring type equipment, and then calculating a preset brain electrical characteristic index from the preprocessed brain electrical signals by a characteristic extraction module of the head ring type equipment; S3, brain state judgment and stimulation parameter dynamic decision: The state judging module of the head ring type equipment compares the real-time brain electrical characteristics extracted in the step S2 with a preset target state model or a threshold value, and based on a comparison result, the decision module of the head ring type equipment generates an optimal electrical stimulation parameter at the current moment; And S4, applying adaptive electrical stimulation: The electric stimulation generating module of the head ring type equipment receives the stimulation parameters decided by the S3 and drives a stimulation electrode (500) integrated on an electrode arm of a forehead main unit (200) or a temporal region of the head ring type equipment to apply transcranial electric stimulation to a target brain region of a user according to the parameters; S5, closed loop feedback and iterative optimization: And (2) returning the head loop type equipment to S2 while or after the stimulation is applied, continuously collecting the brain electrical signals influenced by the stimulation, and carrying out feature extraction, state judgment and parameter decision again. The method is characterized in that the method is circulated, a continuous real-time biofeedback closed loop of acquisition- > analysis- > decision- > stimulation- > re-acquisition is formed, so that a contact quality indicator lamp on the head ring type equipment is lightened and extinguished at a soft and slow rhythm in the whole intervention process, and the method is used for conveying the state that the head ring type equipment is in normal operation to a user.
  2. 2. The method for electrostimulation based on the electroencephalogram closed-loop intervention as claimed in claim 1, characterized in that in S1, green indicates good contact, yellow indicates fair contact, and red indicates poor contact.
  3. 3. The method according to claim 1, wherein in S2, the preprocessing process of the original electroencephalogram signal includes a filtering operation, an amplifying operation and an analog-to-digital conversion operation.
  4. 4. An electrical stimulation method based on electroencephalogram closed-loop intervention as in claim 1, wherein in S3, the target state model may be an electroencephalogram characteristic range corresponding to a desired induced relaxation state and concentration state.
  5. 5. The electrical stimulation method based on the electroencephalogram closed-loop intervention according to claim 1, wherein in S3, the decision module of the head-loop device generates the optimal electrical stimulation parameters at the current moment, and the specific situations are as follows: s301, if the real-time Alpha wave power is lower than the threshold value of the relaxation state, a decision module of the head loop type equipment possibly outputs a parameter instruction for increasing tDCS anode stimulation intensity or applying tACS stimulation with specific frequency; If the real-time forehead lobe wave power is too high, the real-time forehead lobe wave power is possibly in a drowsy state, and the decision module of the head-ring device can output a parameter instruction for applying high-frequency tRNS stimulation to improve alertness.
  6. 6. An electrical stimulation system based on electroencephalogram closed-loop intervention, which is used for realizing the method of any of claims 1-5, and is characterized by comprising a head ring type main body (100), wherein the head ring type main body (100) adopts a non-full-head sleeve light-weight design, a forehead main unit (200) is arranged at a forehead position of the head ring type main body (100), the forehead main unit (200) comprises a core processing chip (210), an electrical stimulation generating module, a wireless communication module (230) and a state indicating unit (240), the core processing chip (210) is used for executing signal processing, feature extraction, state judgment and parameter decision algorithm, the electrical stimulation generating module is used for generating controllable electrical stimulation waveforms, the wireless communication module (230) is used for carrying out data interaction with external equipment, and the state indicating unit (240) is used for displaying the working state of the equipment; The head ring type body (100) is provided with two-side temporal area electrodes (300), the tail ends of the two-side temporal area electrodes (300) are integrated with an electroencephalogram acquisition electrode (310) for acquiring scalp electroencephalogram signals and a contact quality indicator lamp for visually displaying the point contact impedance condition of the electrodes, and a plurality of stimulation electrodes (500) for applying electrical stimulation to the scalp are further arranged on the inner side of the head ring type body (100).
  7. 7. An electro-stimulation system based on the electroencephalogram closed-loop intervention as in claim 6 wherein said head loop body (100) is fitted with a back pillow strap (400) for providing adjustable wearing force, and a power and management module (600) for powering itself is also fitted inside.

Description

Electrical stimulation method and system based on electroencephalogram closed-loop intervention Technical Field The invention relates to the technical field of electrical stimulation, in particular to an electrical stimulation method and system based on electroencephalogram closed-loop intervention. Background In the fields of brain science and nerve engineering, nerve regulation and control by using electrical stimulation (such as transcranial electrical stimulation, tES) is an important intervention means, and is widely applied to scenes such as auxiliary treatment of neuropsychiatric diseases, cognitive enhancement, emotion regulation and the like. At present, most of common electrical stimulation intervention schemes are in an open-loop mode, namely, users are stimulated according to preset fixed parameters (such as stimulation intensity, frequency and duration), and the real-time brain function state of the users is not considered. This open loop intervention has significant drawbacks: firstly, due to individual differences and state fluctuation of the same user at different time points, stimulation with fixed parameters may not achieve optimal intervention effects, and even discomfort or ineffective stimulation may occur; Secondly, most of the existing electroencephalogram acquisition equipment is a full-head type electroencephalogram cap or a sticking electrode, the wearing is complicated, the comfort is poor, the feeling of medical equipment is obvious, psychological conflict and wearing compliance of a user are low, the signal quality is easy to be reduced due to displacement and poor contact after long-term wearing, and the feasibility of any closed-loop strategy depending on high-quality electroencephalogram signals is further affected. Finally, the existing equipment lacks an intuitive and quick wearing quality feedback mechanism, and a user or an operator cannot easily confirm whether electrode contact is good or not under the condition of not depending on external complex software, so that fundamental obstacle is brought to stable implementation of closed loop intervention; Therefore, we propose an electrical stimulation method and system based on electroencephalogram closed-loop intervention. Disclosure of Invention The invention provides an electrical stimulation method and system based on electroencephalogram closed-loop intervention, which are used for solving the problems in the background technology. In order to achieve the above purpose, the present invention adopts the following technical scheme: an electrical stimulation method based on electroencephalogram closed-loop intervention comprises the following steps: s1, wearing self-checking and contact quality optimization: After the user wears the head-loop type equipment, the head-loop type equipment starts a wearing self-checking program, a plurality of electroencephalogram acquisition electrodes positioned at the tail ends of flexible arms of the bilateral temporal areas of the head-loop type equipment start to detect contact impedance with scalp skin, the head-loop type equipment displays colors in real time according to the impedance value of each electrode point through a contact quality indicator lamp, and the user can intuitively fine-tune the angle of the flexible arms of the bilateral temporal areas or tightness of a back occipital fixing band according to the indication of the contact quality indicator lamp until all or key electrode point indicator lamps turn green; s2, acquiring and extracting characteristics of the brain signals in real time: in the electrical stimulation intervention process, the head ring type device continuously and synchronously acquires real-time brain electrical signals of a user through the plurality of brain electrical acquisition electrodes, a signal processing module of the head ring type device preprocesses the acquired original brain electrical signals, and then a characteristic extraction module of the head ring type device calculates preset brain electrical characteristic indexes from the preprocessed brain electrical signals; S3, brain state judgment and stimulation parameter dynamic decision: The state judging module of the head ring type equipment compares the real-time brain electrical characteristics extracted in the step S2 with a preset target state model or a threshold value, and based on a comparison result, the decision module of the head ring type equipment generates an optimal electrical stimulation parameter at the current moment; And S4, applying adaptive electrical stimulation: The electric stimulation generating module of the head ring type equipment receives the stimulation parameters decided by the S3, and drives a stimulation electrode integrated on an electrode arm of a forehead main unit or a temporal area of the head ring type equipment to apply transcranial electric stimulation to a target brain area of a user according to the parameters; S5, closed loop feedback and it