Spectacle type brain activity sensor and spectacle type electrophysiological activity sensing device

Abstract

The invention discloses a spectacle type brain activity sensor for detecting brain waves of the cerebral cortex and a spectacle type electrophysiological activity sensing device. The spectacle type brain activity sensor comprises a spectacle structure, wherein the spectacle structure comprises at least one nose pad and two spectacle legs, an electrode for encephalograms is arranged on the spectacle structure, for the spectacle structure, the nose of a user supports the at least one nose pad, the two auricles of the user support the two spectacle legs, then the spectacle structure is arranged on the head of the user, so that the electrode for encephalograms contacts a V-shaped concave part between one auricle and the skull and / or the back skin of the auricle, and further, electroencephalogram signals can be obtained through the electrode for encephalograms.

Description

technical field [0001] The present invention relates to a wearable physiological activity sensor and device, in particular to a glasses-type brain activity sensor and a glasses-type electronic sensor that can capture electrophysiological signals by contacting electrodes to specific positions on the inner surface of the auricle and / or the back of the auricle. Physiological activity sensing device. Background technique [0002] Traditionally, the electrical activity of the brain measured by placing electrodes on the scalp is called an electroencephalogram (EEG), which can be used to detect and diagnose many physiological conditions, and the obtained brain Activity information can also have many other applications, such as learning concentration, fatigue, brain computer interface (braincomputer interface, BCI), neuroprosthetics, and biometric authentication. [0003] Generally speaking, there are two ways to measure brain electrical activity, the reference montage and the bipo...

AI Technical Summary

Problems solved by technology

[0006] However, because the space in the ear canal is very narrow, not only the positioning of the electrodes is not easy, but also the making of the sampling device becomes very complicated, and it is not easy to implement. Moreover, there is also a problem in sampling in the ear canal, ear wax, ear wax, etc. The ear wax in the ear canal is a substance naturally produced by the human body. It will reduce the contact area between the electrode and the skin of the ear canal, or even completely isolate it. It is not easy to achieve good contact between the electrode and the skin. Cleaning is actually a rather cumbersome process for users

[0007] Furthermore, when the electrodes are placed within the range between the auricle and the skull, since this range is close to the plane of the skull, to maintain the contact between the electrodes and this plane, the force must be fixed towards the skull. , but there is no structure in the pinna to provide force in this direction. Therefore, how to fix the electrodes has always been the most important problem to be overcome. At the same time, it is necessary to pay attention not to sacrifice the comfort of use in order to maintain the stable contact of the electrodes.

[0008] For example, in U.S. Patent US2006 / 009497, the reference electrode (reference electrode) is installed on the earlobe by using the existing common clamping method, and the detection electrode (detection electrode) is made by using the physiological structure of the auricle. Fixing, although this method has good intentions, it is obvious that due to the almost complete lack of fixing force, the detection electrodes are actually difficult to be fixed, and the contact between the electrodes and the skin is quite unstable, and it is easy to rotate and move the head Waiting for shaking, which directly affects the quality of the obtained signal

[0009] In addition, in US Pat. No. 8,565,852, in order to fix the detection electrode (detection electrode) in the triangular fossa (triangular fossa) and the space between the crus of helix (crus of helix) and the superior crux of anthelix (superior crux of anthelix), The electrode contacts the area of ​​the space where the skull is attached, and a special-shaped clamp is used. However, for the user, it is easy to feel uncomfortable due to the force of the clamp after long-term use. Furthermore, this document also provides Another way to maintain the detection electrode at the desired contact position through the ear hook structure, but it can be found that the electrode is still prone to shaking because it cannot provide the force directly applied to the electrode in this way. The contact between them cannot maintain stability for a long time, which will naturally cause the signal quality to decrease

[0010] In U.S. Patent US2012 / 0209101, although the ear-shaped hearing aid is used to carry the electrodes and ensure the contact between the electrodes and the ear canal and the skin of the auricle, in this way, the fixing force mainly comes from the part entering the ear canal and the ear. The friction force between the ear canal, the shape of the hearing aid and the pendant extending behind the ear are only used for positioning. The electrodes outside the ear canal lack direct fixing force. Therefore, as long as there is looseness between the part entering the ear canal and the ear canal, the electrode It will be detached from the surface of the pinna skin, and it is still prone to unstable electrode contact.

[0011] In addition, in U.S. Patent US20070112277, in addition to the implementation of placing the electrodes in the ear canal, it also discloses that the electrodes are placed on the surface of the shell behind the ear to contact the head. This is an ear-worn brain activity detection device. However, such a structure is not easy to make the behind-the-ear shell face the direction of the head, so usually the behind-the-ear shell is only maintained behind the ear, which is very easy to shake, and the gap between the electrode and the skin Contact is not stable

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