CN106236079A - Sleep monitoring eye mask and sleep monitoring method for combined detection of EEG and oculoelectricity - Google Patents

Abstract

The invention discloses a sleep monitoring eye patch for electroencephalogram and electrooculogram composite detection and a sleep monitoring method, and relates to the technical field of sleep monitoring. The inner side surface of the eyeshade body is fixed with an electroencephalogram electrode and a left eye and eye electrical reference electrode; the brain electricity electrode is located at the position corresponding to Fp2, and the left eye electricity reference electrode is located at the position corresponding to EOG left. A main circuit board and a power supply battery are fixed in the interlayer of the eyeshade body; the main circuit board is integrated with a signal processing module, a signal separation module and a wireless transmission module which are sequentially connected, the signal processing module is respectively connected with the electroencephalogram electrode and the left-eye reference electrode, and the wireless transmission module is in wireless communication with an external intelligent terminal; and the main circuit board is also fixed with a right leg driving electrode which is positioned at the corresponding position of Fp1, exposed out of the eye mask body and connected with the signal processing module. The invention can solve the problem that the electroencephalogram signal is counteracted and ensure the validity of the acquired signal; the electroencephalogram and the electrooculogram can be compositely detected, and the sleep monitoring quality is high.

Description

Sleep monitoring eye mask and sleep monitoring method for combined detection of EEG and oculoelectricity

technical field

The invention relates to the technical field of sleep monitoring, in particular to a sleep monitoring eye mask and a sleep monitoring method for combined detection of electroencephalography and oculoelectricity.

Background technique

In the field of sleep monitoring, existing sleep monitoring equipment is mainly divided into professional polysomnography systems and portable (home use) sleep monitors.

Professional polysomnography systems are mostly used in professional institutions such as hospitals. According to the 10/20 EEG position standard (as shown in Figure 1), the brain electrode positions are divided into F (frontal lobe), C middle (central lobe, Central), T (temporal lobe), P (parietal lobe), and P (parietal lobe). Lobe, parietal), O (occipital lobe, Occipital) frontal lobe. Sleep EEG information is mainly concentrated in the F, C, and O frontal lobes. Therefore, when the hospital conducts sleep EEG testing, it will collect the brain waves of each frontal lobe through a professional polysomnography system.

But for home portable sleep monitoring, the single-channel EEG acquisition process is the most comfortable. Since brain waves are the voltage difference between two EEG electrodes, at least three electrical contacts need to be on the human body when collecting single-channel brain waves. The three electrical contacts are: 2 brain electrodes and 1 driving electrode of the right leg, among which, the electrode with a more stable potential among the 2 brain electrodes is called the reference electrode, and the other electrode containing more EEG information is used as the reference electrode. EEG electrodes, the voltage difference between these two electrodes is an EEG channel; the right leg drive electrode is used to reduce the common mode signal of the human body, thus playing the role of noise reduction.

Since people's head will move during sleep, if the electrodes are placed in the C, T, P, O frontal lobes, it will easily cause discomfort and generate interference signals. Therefore, from the comfort point of view, the existing household portable sleep monitor , the electrodes are usually placed on the F frontal lobe, for example: Neuroon products on the market place the EEG electrodes and reference electrodes on the left and right sides of the forehead. But in the course of long-term use, it is found that although this method solves the problem of comfort, the disadvantage is that the left and right sides of the forehead belong to the F frontal lobe, and their voltage difference is very small, so that the effective EEG signals collected are offset. An effective brain wave channel cannot be formed, thereby affecting the quality of sleep monitoring. In severe cases, it is even impossible to collect EEG signals, and normal sleep monitoring cannot be performed. In addition, because the existing household portable sleep monitors usually only perform a single detection and processing for the EEG when performing sleep monitoring, the index of sleep monitoring is single, and the referenceability is not ideal, which makes the quality of sleep monitoring not high enough. .

Contents of the invention

In view of the defects in the prior art, the purpose of the present invention is to provide a sleep monitoring goggle and a sleep monitoring method for EEG and oculoelectric composite detection, which can solve the problem of EEG signals being offset under the premise of ensuring comfort. The problem ensures the validity of the collected signals; at the same time, it can perform combined detection of oculoelectricity and EEG, and the quality of sleep monitoring is high.

In order to achieve the above object, the technical solution adopted by the present invention is: provide a sleep monitoring goggle for combined detection of EEG and oculoelectricity, including the goggle body, the left and right ends of the goggle body are connected by an elastic headband, the elastic head The belt and the eye mask body form a wearable eye mask, which is characterized in that: the inner surface of the eye mask body is fixed with an EEG electrode and a left eye ophthalmogram reference electrode, and the EEG electrode is located at a position corresponding to the right front parietal frontal lobe of the human body , used to collect the EEG potential as the reference potential of the left eye electricity; the left eye electricity reference electrode is located at a position corresponding to the left eye electricity of the human body, used to collect the left eye electricity and provide the EEG potential Reference potential; the eye mask body is provided with an interlayer, and a main circuit board and a power supply battery connected to the main circuit board are fixed in the interlayer; the main circuit board is integrated with sequentially connected signal processing modules, signal separation modules and wireless transmission module, and the signal processing module is connected to the EEG electrode and the left-eye ophthalmogram reference electrode respectively, and the wireless transmission module performs wireless communication with the external intelligent terminal; the side of the main circuit board facing the human face is fixed with a The driving electrode of the right leg of the noise is located at the position corresponding to the left anterior parietal frontal lobe of the human body and exposed outside the eye mask body, and the driving electrode of the right leg is connected to the signal processing module.

On the basis of the above technical solution, the signal processing module is integrated with an analog amplifier circuit, a digital-to-analog converter and a digital signal analysis module; the analog amplifier circuit is used to amplify the amplitude of the collected EEG signals and electrooculogram signals ; The digital-to-analog converter is used to convert the amplified EEG signal and electro-oculogram signal into a digital signal and send it to the digital signal analysis circuit; the digital signal analysis module is used to analyze and store the converted digital signal.

On the basis of the above technical solution, a control switch is provided on the outer edge of the eye mask body, and the control switch is connected to the main circuit board for on/off control of each functional module integrated on the main circuit board.

On the basis of the above technical solution, the power supply battery is a rechargeable battery, and the outer edge of the eye mask body is correspondingly provided with a charging port, and the charging port is connected to the rechargeable battery through the main circuit board.

On the basis of the above technical solution, the EEG electrode and the left-eye oculoelectric reference electrode are fixed to the inner surface of the eye mask body by sewing or pasting.

On the basis of the above technical solution, the electrode materials of the EEG electrode, the left-eye oculoelectric reference electrode and the right-leg driving electrode are all made of soft conductive materials.

On the basis of the above technical solution, the soft conductive material is glass silver-plated silica gel.

On the basis of the above technical solution, the eye mask body is made of soft material with elasticity and good air permeability.

The present invention also provides a sleep monitoring method based on the sleep monitoring goggles. The steps include: S1. After wearing the sleep monitoring goggles, adjust the sleep monitoring goggles by hand so that the three electrodes on the inner side of the goggles are located on the face of the human body The corresponding position and good contact with the human face; S2. Turn on the control switch to start sleep monitoring, the EEG electrode collects the EEG potential and uses this potential as the reference potential of the left eye, and the left eye reference electrode collects the left eye. and provide a stable reference potential for the EEG potential to form EEG signals and electro-oculogram signals. At the same time, the right leg drive electrodes reduce the common mode noise of the human body during the acquisition process; S3. The signal processing module of the main circuit board processes the acquired Amplify, convert and analyze the EEG signal and the EEG signal; and send the analyzed and processed signal to the signal separation module; S4. The signal separation module separates the processed EEG signal from the EEG signal, and separates the The subsequent EEG signals and electro-ocular signals are sent to the external intelligent terminal through the wireless transmission module to realize sleep monitoring.

On the basis of the above technical solution, the signal processing module is integrated with an analog amplifier circuit, a digital-to-analog converter and a digital signal analysis module; the specific process of step S3 includes the following steps: S301. The analog amplifier circuit in the signal processing module first Amplify the voltage amplitude of the collected EEG signals and EEG signals, and then send the amplified signals to a digital-to-analog converter; S302. The digital-to-analog converter converts the amplified EEG signals and Oculoelectric signals into digital signals , and send to the digital signal analysis circuit; S303. The digital signal analysis module analyzes and stores the converted digital signal; finally sends the analyzed and processed signal to the signal separation module.

The beneficial effects of the present invention are:

1. In the present invention, an EEG electrode and a left-eye oculoelectric reference electrode are fixed on the inner surface of the eye mask body; the EEG electrode is located at a position corresponding to the right anterior parietal frontal lobe of the human body (i.e. in the 10/20 EEG position standard). Fp2), the left eye electro-oculogram reference electrode is located at the position corresponding to the left eye electro-oculogram of the human body (that is, EOG left, electro-oculogram left). Compared with the prior art where the EEG electrodes and reference electrodes are placed on the left and right sides of the forehead (F frontal lobe), the sleep monitoring eye mask of the present invention places the EEG electrodes on the F frontal lobe, and the left eye electro-oculogram The reference electrode is placed at the corresponding position of the left eye under the left eye. Since the lower part of the eye does not belong to any frontal lobe, there is no EEG signal, and the distance between the electrodes is large and the potential difference is large. Therefore, the EEG signal can be effectively avoided. The reference potential provided by the left eye oculoelectric reference electrode is offset to ensure the validity of the collected signal.

2. In the present invention, the EEG electrode is used to collect the EEG potential as the reference potential of the left eye electricity, and the left eye electricity reference electrode is used to collect the left eye electricity and provide a stable reference potential for the EEG potential. They work together to form the EEG signal and the electroocular signal. At the same time, the right leg driving electrode can reduce the common mode noise of the human body during the acquisition process, thereby improving the acquisition quality, and the signal separation module on the main circuit board can The electroencephalogram signal is separated from the oculoelectric signal, so as to realize the composite detection of electroencephalogram and oculoelectricity. Compared with the single detection and processing method for EEG in the prior art, the present invention can increase the detection of EEG while mainly performing EEG detection, and the EEG signal is the signal of sleep waking period and sleep eye movement. Therefore, the monitoring effect of the present invention is more ideal, reliable and comprehensive than the traditional monitoring effect.

3. In the present invention, the electrode materials of the EEG electrode, the left-eye oculoelectric reference electrode and the right-leg driving electrode are all made of soft conductive materials, such as silvered glass silicone. Compared with the currently commonly used hard electrode materials, such as silver-plated silver chloride, copper-plated gold, etc., soft conductive materials are more comfortable and can better contact with human skin.

4. In the present invention, the eye mask body is made of soft material with good elasticity, good air permeability, such as nylon cloth, elastic fiber cloth or velvet cloth, which is more comfortable to wear and easy to clean.

Description of drawings

Figure 1 is a schematic diagram of the 10/20 EEG location standard;

Fig. 2 is a partial cross-sectional view of the inner side of the eye mask body in the embodiment of the present invention;

Fig. 3 is a perspective view of the use state of the sleep monitoring eye mask in the embodiment of the present invention.

Reference signs:

1-Eye mask body; 2-Elastic headband; 3-Control switch; 4-Right leg driving electrode; 5-Charging port; 6-Main circuit board; 7-EEG electrode; - wireless transmission module; 10 - signal separation module; 11 - signal processing module; 12 - power supply battery.

detailed description

The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

Referring to Fig. 2 and Fig. 3, the embodiment of the present invention provides a sleep monitoring goggle for combined detection of EEG and oculoelectricity, including a goggle body 1, and the left and right ends of the goggle body 1 are connected by an elastic headband 2 , the elastic headband 2 and the eye mask body 1 form a wearable eye mask. The inner surface of the eye mask body 1 is fixed with an EEG electrode 7 for collecting the EEG potential and as the reference potential of the left eye EEG, and is used for collecting the EEG and providing the EEG potential. The left eye electro-oculogram reference electrode 8 of stable reference potential; Wherein, described electroencephalogram electrode 7 is positioned at the position corresponding to the right anterior parietal frontal cortex of human body (being Fp2 place in 10/20 electroencephalogram position standard), described left The oculoelectric reference electrode 8 is located at the position corresponding to the left oculogram of the human body (ie, EOG left, electro-oculogram left), and the EEG electrode 7 and the left eye oculogram reference electrode 8 work together to realize the EEG signal and the electrooculogram. signal collection. It can be understood that the EEG signal is the voltage difference between the EEG potential and the reference potential provided by the left eye electro-oculogram reference electrode 8; the electro-oculogram signal is the voltage difference between the EEG potential and the EEG potential.

The eye mask body 1 is provided with an interlayer, and a main circuit board 6 and a power supply battery 12 connected to the main circuit board 6 are fixed in the interlayer. Wherein, the main circuit board 6 is integrated with a sequentially connected signal processing module 11 (for amplifying, converting and analyzing the collected EEG signals and oculoelectric signals), a signal separation module 10 (for converting the processed The electroencephalogram signal is separated from the oculoelectric signal) and the wireless transmission module 9 (for sending the separated result to an external intelligent terminal), and the signal processing module 11 is also connected with the electroencephalogram electrode 7 and the electrooculogram reference electrode 8 of the left eye respectively. Connected, the wireless transmission module 9 communicates wirelessly with an external intelligent terminal. In addition, the main circuit board 6 is fixed with the right leg driving electrode 4 for reducing the common mode noise of the human body toward the side of the human body face, and the right leg driving electrode 4 is located at a position corresponding to the left front parietal lobe of the human body (i.e. 10/ 20 Fp1 in the EEG position standard) and exposed outside the eye mask body 1, and the right leg driving electrode 4 is connected to the signal processing module 11.

Specifically, the signal processing module 11 is integrated with an analog amplifier circuit, a digital-to-analog converter and a digital signal analysis module. Among them, the analog amplifying circuit is used to amplify the voltage amplitude of the collected weak EEG signals and electro-oculogram signals so that the digital-to-analog converter can perform conversion; the digital-to-analog converter is used to amplify the amplified EEG signals and The oculoelectric signal is converted into a digital signal and sent to the digital signal analysis circuit; the digital signal analysis module is used to analyze and store the converted digital signal. In addition, it can be understood that in the classification of EEG sleep states, the current sleep state not only depends on the current EEG characteristics, but also depends on the past EEG characteristics, and the EEG characteristics of different users have certain differences. Therefore, when the digital signal analysis circuit of the present invention analyzes and processes the EEG signals, it uses a long-short-term memory artificial neural network (Long-Short Term Memory, LSTM) to analyze time series information. This is an algorithm commonly used in translation software and handwriting recognition. It is particularly accurate in analyzing time series information; it also uses Convolutional Neural Network (CNN) and Rectifier Neural Network (RNN) to analyze brain Electrical signal features, which are very powerful neural networks in deep learning, can analyze high-order features (features of features) very well, and can effectively improve the quality of analysis and processing.

Further, as shown in FIG. 2, in order to better control the opening and closing of the sleep monitoring process, a control switch 3 is also provided on the outer edge of the eye mask body 1, and the control switch 3 is connected to the main circuit board 6. It is used for on/off control of each functional module integrated on the main circuit board 6 . In addition, in order to overcome the shortcoming of the common power supply battery 12, which needs to be replaced frequently, the power supply battery 12 of the present invention selects a rechargeable battery that is economical and environmentally friendly, has a large power, and can be recharged repeatedly. Correspondingly, a charging port 5 is arranged at the corresponding place, and the charging port 5 is connected with the rechargeable battery through the main circuit board 6 .

In this embodiment, the eye mask body 1 is made of soft materials with good elasticity, cut-off and air permeability, such as nylon cloth, elastic fiber cloth or velvet cloth, so as to ensure more comfortable wearing. The EEG electrode 7 and the left-eye ophthalmogram reference electrode 8 are fixed on the inner surface of the eye mask body 1 by sewing or pasting, and the electrodes of the EEG electrode 7, the left-eye ophthalmography reference electrode 8 and the right leg driving electrode 4 The materials are made of soft conductive materials, such as Silvered Glass Silicone. Compared with the existing hard electrode materials, the current electrode materials are all hard electrode materials, such as silver-plated silver chloride, copper-plated gold, etc. etc., soft conductive materials can improve comfort and have good contact with the human body. In addition, in order to ensure that the contact position between the above-mentioned electrodes and the human body is accurate, so that the corresponding position will not be shifted due to the difference in the size of the human head, resulting in inaccurate signal acquisition, according to the head and face of children, adult women and adult men The general range of the eye mask body 1 is set to three specifications: children’s, adult women’s and adult men’s. The length is 20-21cm, the width is 7-8cm; the adult male model - the length is 21cm-22cm, the width is 9-10cm.

The embodiment of the present invention also provides a sleep monitoring method based on the above-mentioned sleep monitoring goggles, comprising the following steps:

S1. After wearing the sleep monitoring goggles, adjust the sleep monitoring goggles by hand so that the three electrodes on the inner side of the goggle body 1 are located at the corresponding positions on the human face and in good contact with the human face, as shown in Figure 3.

S2. Turn on the control switch 3 to start sleep monitoring. The EEG electrode 7 collects the EEG potential and uses the potential as the reference potential of the left eye electricity. The left eye electricity reference electrode 8 collects the left eye electricity and provides the EEG potential. A stable reference potential is used to form EEG signals and electro-ocular signals. At the same time, the right leg driving electrode 4 reduces the common mode noise of the human body during the acquisition process, thereby improving the acquisition quality.

S3. The signal processing module 11 of the main circuit board 6 amplifies, converts and analyzes the collected EEG signals and electro-oculogram signals; and sends the analyzed and processed signals to the signal separation module 10 .

In actual operation, the specific process of step S3 includes the following steps:

S301. The analog amplifying circuit in the signal processing module 11 first amplifies the voltage amplitudes of the collected weak EEG signals and oculoelectric signals, and then sends the amplified signals to the digital-to-analog converter;

S302. The digital-to-analog converter converts the amplified EEG signal and the electro-oculogram signal into digital signals, and sends them to the digital signal analysis circuit;

S303 . The digital signal analysis module analyzes and stores the converted digital signal; finally sends the analyzed and processed signal to the signal separation module 10 .

S4. The signal separation module 10 separates the processed EEG signal and the EEG signal, and sends the separated EEG signal and the EEG signal to an external intelligent terminal such as a mobile phone through the wireless transmission module 9 to realize sleep monitor.

The present invention is not limited to the above-mentioned embodiments. For those of ordinary skill in the art, without departing from the principle of the present invention, some improvements and modifications can also be made, and these improvements and modifications are also considered protection of the present invention. within range. The content not described in detail in this specification belongs to the prior art known to those skilled in the art.

Claims (10)

1. A sleep monitoring goggle for combined detection of EEG and oculoelectricity, comprising a goggle body (1), the left and right ends of the goggle body (1) are connected by an elastic headband (2), and the elastic headband (2) ) and the eye mask body (1) form a wearable eye mask, which is characterized in that: the inner surface of the eye mask body (1) is fixed with an EEG electrode (7) and a left eye ophthalmogram reference electrode (8), and the EEG The electrode (7) is located at a position corresponding to the right anterior parietal frontal lobe of the human body, and is used for collecting EEG potentials and as a reference potential of the left eye electricity; the left eye electricity reference electrode (8) is located at the left eye of the human body. The position corresponding to the electricity is used to collect the left eye electricity and provide a reference potential for the EEG potential; The eye mask body (1) is provided with an interlayer, and a main circuit board (6) and a power supply battery (12) connected to the main circuit board (6) are fixed in the interlayer; the main circuit board (6) is integrated with sequential connected signal processing module (11), signal separation module (10) and wireless transmission module (9), and the signal processing module (11) is connected to the EEG electrode (7) and the left-eye electro-oculogram reference electrode (8) respectively, The wireless transmission module (9) performs wireless communication with an external intelligent terminal; The side of the main circuit board (6) facing the face of the human body is fixed with a right leg driving electrode (4) for reducing common mode noise of the human body, and the right leg driving electrode (4) is located at a position corresponding to the left front parietal lobe of the human body And exposed outside the eye mask body (1), and the right leg driving electrode (4) is connected with the signal processing module (11). 2. The sleep monitoring goggle for composite detection of EEG and EEG as claimed in claim 1, characterized in that: the signal processing module (11) is integrated with an analog amplifier circuit, a digital-to-analog converter and a digital signal analysis module ; The analog amplifying circuit is used to amplify the amplitude of the collected EEG signal and the electro-oculogram signal; the digital-to-analog converter is used to convert the amplified EEG signal and the electro-oculogram signal into a digital signal and send it to a digital signal. The signal analysis circuit; the digital signal analysis module is used to analyze and store the converted digital signal. 3. The sleep monitoring goggle for combined detection of EEG and oculoelectricity as claimed in claim 1, characterized in that: a control switch (3) is arranged on the outer edge of the goggle body (1), and the control switch (3) It is connected with the main circuit board (6), and is used for on/off control of each functional module integrated on the main circuit board (6). 4. The sleep monitoring eye mask for combined detection of EEG and oculogram according to claim 1, characterized in that: the power supply battery (12) is a rechargeable battery, and the outer edge of the eye mask body (1) Correspondingly, there is a charging port (5), and the charging port (5) is connected to the rechargeable battery through the main circuit board (6). 5. The sleep monitoring eye mask for EEG and oculoelectric composite detection as claimed in claim 1, characterized in that: the EEG electrode (7), the left eye oculoelectric reference electrode (8) are sewn or pasted The form is fixed on the inner surface of the eye mask body (1). 6. The sleep monitoring eye mask for EEG and oculoelectric composite detection according to any one of claims 1 to 5, characterized in that: said EEG electrode (7), left eye oculoelectric reference electrode (8 ) and the electrode material of the right leg driving electrode (4) all adopt soft conductive materials. 7. The sleep monitoring goggle for combined detection of EEG and oculoelectricity according to claim 6, characterized in that: the soft conductive material is glass silver-plated silica gel. 8. The sleep monitoring goggle for combined detection of EEG and oculoelectricity according to any one of claims 1 to 5, characterized in that: the goggle body (1) is made of a soft and breathable soft Material. 9. A sleep monitoring method based on the sleep monitoring eye mask of claim 1, comprising the following steps: S1. After wearing the sleep monitoring goggles, adjust the sleep monitoring goggles by hand so that the three electrodes on the inner side of the goggle body (1) are located at the corresponding positions of the human face and are in good contact with the human face; S2. Turn on the control switch (3) to start sleep monitoring. The EEG electrode (7) collects the EEG potential and uses this potential as the reference potential of the left eye electricity, and the left eye electricity reference electrode (8) collects the left eye electricity And provide a stable reference potential for the EEG potential to form EEG signals and electro-oculogram signals. At the same time, the right leg driving electrode (4) reduces the common mode noise of the human body during the acquisition process; S3. The signal processing module (11) of the main circuit board (6) amplifies, converts and analyzes the collected EEG signals and oculoelectric signals; and sends the analyzed and processed signals to the signal separation module (10); S4. The signal separation module (10) separates the processed EEG signal from the EEG signal, and sends the separated EEG signal and EEG signal to an external intelligent terminal through the wireless transmission module (9) to realize sleep monitoring. 10. sleep monitoring method as claimed in claim 9 is characterized in that: described signal processing module (11) is integrated with analog amplifying circuit, digital-to-analog converter and digital signal analysis module; On this basis, the specific step S3 The process includes the following steps: S301. The analog amplifying circuit in the signal processing module (11) first amplifies the voltage amplitudes of the collected electroencephalogram signals and oculoelectric signals, and then sends the amplified signals to the digital-to-analog converter; S302. The digital-to-analog converter converts the amplified EEG signal and the electro-oculogram signal into digital signals, and sends them to the digital signal analysis circuit; S303. The digital signal analysis module analyzes and stores the converted digital signal; finally sends the analyzed and processed signal to the signal separation module (10).