Novel passive flexible optical electrodes
A flexible and optical technology, used in medical science, diagnosis, diagnostic recording/measurement, etc., can solve the problems of insufficient sensitivity and compatibility of electro-optical sensing, low signal-to-noise ratio, etc., to remove noise interference and motion artifacts, reduce Effects of contact resistance, improved sensitivity and compatibility
Active Publication Date: 2021-11-23
TIANJIN UNIV
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[0011] Aiming at the problems of low signal-to-noise ratio and insufficient electro-optic sensing sensitivity and compatibility in the above-mentioned prior patent application, the present invention proposes a new passive flexible optical electrode, the overall design of which is Ensure the stable transmission of EEG signals during the detection and transmission process, so that the substrate, electrical lead layer and optical sensitive devices form a sandwich structure
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[0026] Specific embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. Wherein, for the unspecified parameters, technical personnel can refer to the prior art for understanding and implementation.
[0027] Such as figure 1 and figure 2 As shown, a novel passive flexible optical electrode of the present invention includes a flexible probe 2 made of PDMS polymer; at the rear end of the flexible probe 2, the PDMS substrate 4 is used as a support position, and the flexible probe 2 is embedded into the substrate 4 in an array It is in direct contact with the electrical lead layer 5 formed by the gold film. In order to increase the adhesion between the gold film and the substrate 4, a layer of flexible PI polymer can be added between the two as a transition layer 7; at the same time, in order to increase the contact area with the gold film and reduce the contact resistance, polypyrrole graphene The coating la...
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The invention discloses a novel passive flexible optical electrode, which consists of five parts: an optical sensitive device (1), a flexible probe (2), a substrate (4), an electrical lead layer (5) and a transition layer (7); wherein: The flexible probes (2) are embedded in the matrix (4) in an array, the flexible probes (2) include a free end and a bottom end, the free end is in direct contact with the living body, and the bottom end passes through the transition layer (7) to connect with the electrical lead layer (5) bonding; the electrical lead layer (5) is arranged on the upper surface of the transition layer (7); the electrode groove structure formed on the electrical lead layer (5) is used as an optical sensitive device (1) Interface. The invention effectively reduces the hair interference and the contact impedance between the electrode and the scalp, and integrates with the optical sensitive device, removes the noise interference and motion artifacts caused by the wire, improves the sensitivity and compatibility of the electro-optic sensing, and realizes the sensor based on the optical principle. Wearable long-term stable EEG signal detection.
Description
technical field [0001] The invention relates to the technical field of novel passive flexible optical electrodes applied to human body surface bioelectricity detection and the field of detection of weak low-frequency EEG signals, in particular to a passive flexible optical electrode based on electro-optical effect and which can be used for EEG detection. Background technique [0002] EEG is the external manifestation of nerve cell activity in the human body, and as one of the most basic physiological phenomena, it has great application value and research significance in medical clinical diagnosis, disease prevention, brain-computer interface and artificial intelligence. EEG is a weak low-frequency signal, only on the order of microvolts. Therefore, in order to improve the detection accuracy, it is necessary to propose higher performance indicators for biological detection electrodes. [0003] Currently commonly used biological detection electrodes include traditional Ag / Agcl...
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IPC IPC(8): A61B5/291A61B5/256A61B5/266A61B5/268A61B5/263
CPCA61B5/291
Inventor 贾大功廖伦军张红霞刘铁根王睿航
Owner TIANJIN UNIV