CN112603333A - Electroencephalogram acquisition glasses using dry electrodes - Google Patents
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- CN112603333A CN112603333A CN202011489787.4A CN202011489787A CN112603333A CN 112603333 A CN112603333 A CN 112603333A CN 202011489787 A CN202011489787 A CN 202011489787A CN 112603333 A CN112603333 A CN 112603333A
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/0002—Remote monitoring of patients using telemetry, e.g. transmission of vital signals via a communication network
- A61B5/0004—Remote monitoring of patients using telemetry, e.g. transmission of vital signals via a communication network characterised by the type of physiological signal transmitted
- A61B5/0006—ECG or EEG signals
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- A—HUMAN NECESSITIES
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- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/16—Devices for psychotechnics; Testing reaction times ; Devices for evaluating the psychological state
- A61B5/168—Evaluating attention deficit, hyperactivity
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
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- A61B5/18—Devices for psychotechnics; Testing reaction times ; Devices for evaluating the psychological state for vehicle drivers or machine operators
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- A61B5/6801—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be attached to or worn on the body surface
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Abstract
The invention discloses electroencephalogram collecting glasses using dry electrodes, which comprise a glasses body frame, the dry electrodes and a collecting plate, wherein the dry electrodes and the collecting plate are arranged on the glasses body frame and are connected through a wire, the glasses body frame is based on a common glasses structure, a plurality of dry electrode mounting interfaces are arranged on the common glasses structure and are used for mounting the dry electrodes, and collecting plate mounting connectors are arranged on the side edges of the glasses body frame and are used for mounting the collecting plate. The dry electrode mounting interfaces are six in number, correspond six electroencephalogram collection points respectively, and the positions of the joints of the arms of the eyes and the spectacle frames, and the positions of the dry electrode mounting interfaces, the joints of the spectacle frames and the nose pads on the two sides of the spectacle frames are provided with elastic mechanisms for people to be attached to different facial forms. The electrode structure improves the freedom degree of movement of the electrode, enhances the applicability to different people, is beneficial to people with different shapes of faces and has stability through the design of a plurality of elastic mechanisms.
Description
Technical Field
The invention belongs to the field of wearable equipment, and particularly relates to electroencephalogram acquisition glasses using dry electrodes.
Background
Automobile driving is an indispensable basic skill of modern people, but because of factors such as high living pressure and fast rhythm, drivers can drive in a fatigue state under many conditions, and great hidden dangers are brought to society and personal safety.
In order to improve the concentration degree of a driver during driving and ensure safety, some fatigue detection systems are provided at present, and the existing fatigue detection systems usually acquire audio and video information of the driver for analysis to obtain the fatigue state of the driver. However, there may be relatively large interference to the audio-video factors or poor effect due to factors such as occlusion.
Considering that the electroencephalogram is a stable signal capable of reflecting the mental state of a human body, the invention relates to a portable electroencephalogram acquisition platform, and because the glasses are a personal article which is very common and can be tightly attached to the brain, the invention counts the dry electrodes and the acquisition boards on the structure of the glasses, thereby realizing the portable acquisition of the electroencephalogram signals.
Disclosure of Invention
Aiming at the defects in the prior art, the invention designs the electroencephalogram acquisition glasses using the dry electrodes, and aims to acquire electroencephalogram signals in real time, convert the electroencephalogram signals into digital data and send the digital data to a data processing terminal. Fatigue driving detects glasses aim at provides a wearable brain electricity collector to glasses are structural frame, thereby can be convenient the collection wearing person's brain electricity data, input data processing platform is data processing terminal promptly and carries out the brain electricity signal analysis in order to obtain individual mental state.
The technical scheme adopted for achieving the purpose of the invention is as follows:
the utility model provides an use brain electricity collection glasses of dry electrode, includes glasses body frame, dry electrode and collection board.
The dry electrode and the collecting plate are arranged on the frame of the glasses body and are connected through a lead.
The glasses body frame is based on a common glasses structure, a plurality of dry electrode mounting interfaces are arranged on the common glasses structure and used for mounting dry electrodes, and collecting plate mounting connectors are arranged on the side edges of the glasses body frame and used for mounting collecting plates.
The glasses body frame on total six dry electrode installation interfaces, correspond six brain electricity collection points respectively, dry electrode installation interface set up respectively in the both sides nose of glasses body frame hold in the palm the position, the both sides picture frame position of glasses body frame and glasses body frame both sides eyes arm rear end.
The positions of the joint of the arms of the eyes and the glasses frame, the joint of the dry electrode and the glasses frame at the positions of the glasses frames at the two sides and the nose pads at the two sides are all provided with elastic mechanisms for people to be attached to different facial shapes.
The dry electrodes are arranged on the dry electrode mounting interface in a buried mode through reserved concave holes on the dry electrode mounting interface of the glasses body frame and used for collecting electroencephalogram potentials, the two electrodes at the nose support positions are reference electrodes, and the rest 4 collecting points read potential differences between the electrode and the reference electrodes, so that electroencephalogram signals of 4 point positions can be obtained.
The acquisition board comprises a main control module, an electroencephalogram acquisition module and a wireless module.
The master control module adopts a low-current low-power chip and supports SPI communication and UART communication.
The electroencephalogram acquisition module is connected with the main control module in an SPI communication mode, the dry electrode is connected with the electroencephalogram acquisition module, the potential between the electrode to be measured and the reference electrode is converted into a digital signal through the electroencephalogram acquisition module, and the main control module reads the converted digital signal through SPI communication.
The wireless module supports UART communication, is connected with the main control module in a UART communication mode and is used for communication between the electroencephalogram acquisition glasses and the data processing terminal, and the main control module receives digital signals of the electroencephalogram acquisition module, packages and packages original values and transmits the original values to the data processing terminal through the wireless module.
Furthermore, the collecting plate mounting connector and the glasses body frame are integrally formed and used for mounting the collecting plate.
Further, the wire is walked through the inside recess that sets up on the glasses body frame.
Furthermore, the dry electrode adopts a silver chloride dry electrode. The sensor has good conductivity to human body, is a universal human body potential acquisition sensor, and is often used in the field of electrocardio or electroencephalogram acquisition.
Furthermore, the dry electrode mounting interfaces at the positions of the mirror frames on the two sides are provided with rotating rod pieces, so that the dry electrode is better close to the skin of a human body by adding a degree of freedom;
furthermore, the main control module of the acquisition board adopts a chip with the model of PIC32MX 250128B.
Furthermore, the electroencephalogram acquisition module of the acquisition board adopts an ADS1299 chip.
Further, the wireless module of the acquisition board adopts a module with the model number of RFD22301 and Bluetooth 4.0.
The invention has the following beneficial effects:
the portable electroencephalogram acquisition device realizes portable electroencephalogram acquisition, improves the freedom degree of movement of the electrode through the design of a plurality of elastic mechanisms, enhances the applicability to different people, is beneficial to people with different shapes of faces, and has stability.
The invention realizes the brain fatigue state detection and identification by using the electroencephalogram collection with less electrode quantity.
The technology of the invention can be expanded to other electroencephalogram technology application occasions and has universality.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of the present invention;
FIG. 2 is a diagram of a mounting interface of the dry electrode at the frame position according to the embodiment of the present invention;
fig. 3 is a logical block diagram of the present invention.
Detailed Description
The invention is further illustrated by the following figures and examples.
Example (b):
as shown in fig. 1 and 2, the invention provides electroencephalogram acquisition glasses, which comprise a glasses body frame 13, a dry electrode and an acquisition board. The acquisition board comprises an electroencephalogram acquisition module, a main control module and a wireless module.
On glasses body frame 13, be provided with 6 dry electrode installation interfaces promptly and do the electrode and place the point, the shrinkage pool electrode that does the electrode and can fill in through reserving places in the glasses. The dry electrode mounting interfaces are respectively arranged at the nose pad positions at the two sides of the glasses body frame 13, the spectacle frame positions at the two sides of the glasses body frame 13 and the rear ends of the eye arms at the two sides of the glasses body frame 13.
As shown in figure 1, the dry electrode 1 and the dry electrode 4 are installed in the dry electrode installation interface at the rear ends of the eye arms on the two sides of the glasses body frame 13, the collected EEG signals of the positions behind the ears are collected, the serial numbers 7 and 8 are installation holes of the glasses arm spring devices, the electrodes can be attached to the skin of a human body better, and the accurate collection of the signals and the reduction of the motion interference are facilitated.
The dry electrodes 2 and 3 are arranged in dry electrode mounting interfaces at positions of picture frames on two sides of a glasses body frame 13, electroencephalograms at the forehead position are collected, a rotating rod piece 15 and a rotating rod piece 16 are arranged on the dry electrode mounting interfaces at the positions of the picture frames on the two sides, the dry electrodes with the serial numbers of 2 and 3 are enabled to be better close to the skin of a human body by adding a degree of freedom, and the serial numbers of 9 and 10 are spring mounting holes arranged on the rotating rod pieces;
the dry electrodes 5 and 6 are arranged on dry electrode mounting interfaces at nose support positions on two sides of the glasses body frame 13, collected are electroencephalogram signals at the nose bridge position, and the serial numbers 11 and 12 are spring mounting holes.
In order to make the electrode better close to the skin and facilitate the signal collection, springs are arranged at the positions of the nose pads at the two sides of the glasses body frame 13 at the connecting part of the arms of the eyes and the glasses frame, between the rotating rod piece 15 and the frame 13 and between the rotating rod piece 16 and the frame 13. The spring is made of tension spring, the model is 0.2-2-10 stainless steel, the two sides of the spring are respectively fixed on the two sides of the mounting hole by using a round head screw GB818, and the spring is fixed at the back by using a nut. The mounting method of the spring at the mounting holes 7, 8, 9,10, 11 and 12 is the same.
The collecting board mounting connector 14 is used for mounting a collecting board, and the collecting board is responsible for collecting all data and realizing wireless transceiving function. All dry electrodes are connected to the acquisition board through wires arranged in grooves in the glasses body frame 13, and the acquisition board acquires the change of brain potential through the wires.
Fig. 3 is a logic structure diagram of fatigue detection glasses, the whole fatigue detection glasses are designed on the basis of a glasses body frame, electroencephalogram point positions are acquired according to electroencephalogram fatigue algorithm, and appropriate grooves are arranged on the glasses body frame to install electrodes. The change of the electroencephalogram potential of the human body is induced by the dry electrode and then input to the electroencephalogram acquisition module to be converted into an electric signal.
The master control module receives digital signals of the electroencephalogram acquisition module, original values are input to the wireless module through UART communication after being packaged and packaged, the wireless module is connected with the vehicle-mounted data processing terminal through Bluetooth, and the vehicle-mounted terminal can receive data after being paired with the Bluetooth.
A data processing terminal is a computing platform that has fast parallel computing processing capabilities and is capable of outputting signals such as audio. The data processing terminal adopts a designed special terminal device, a vehicle-mounted computer with a Bluetooth module or an intelligent mobile device such as a mobile phone. And after receiving the digital signal sent by the wireless module, the data processing terminal performs 50 Hz or 60 Hz notch filtering according to the local power frequency and separates the electroencephalogram signal by adopting a negative entropy-based FastICA method. The method comprises the steps of firstly calculating GFP values (Global Field Power, the GFP values are standard deviations of all electrode potentials) of 4 applied electrodes and a relation number of each component and the GFP values, then comparing correlation coefficients, identifying an independent component corresponding to the maximum absolute value as an artifact independent component, and finally setting the independent component to zero to reconstruct a clean electroencephalogram signal. And then, respectively segmenting data of each channel according to the frequency band by using a filter, extracting features by using a pre-trained convolutional neural network, classifying and outputting results. And finally, when the judgment result is fatigue, the terminal reminds the user in a voice mode and the like.
Claims (9)
1. The electroencephalogram acquisition glasses using the dry electrodes are characterized by comprising a glasses body frame, the dry electrodes and an acquisition board;
the dry electrode and the collecting plate are arranged on the frame of the glasses body and are connected through a lead;
the glasses body frame is based on a common glasses structure, a plurality of dry electrode mounting interfaces are arranged on the common glasses structure and used for mounting dry electrodes, and collecting plate mounting connectors are arranged on the side edges of the glasses body frame and used for mounting collecting plates;
the dry electrode mounting interfaces are respectively arranged at the positions of nose pads at two sides of the glasses body frame, the positions of spectacle frames at two sides of the glasses body frame and the rear ends of the eye arms at two sides of the glasses body frame;
the positions of the joint of the arms of the eyes and the glasses frame, the joint of the dry electrode and the glasses frame at the positions of the glasses frames at the two sides and the nose pads at the two sides are all provided with elastic mechanisms for people to be attached to different facial shapes.
2. The electroencephalogram acquisition glasses using the dry electrodes as claimed in claim 1, wherein the dry electrodes are mounted on the dry electrode mounting interface through concave holes reserved on the dry electrode mounting interface of the glasses body frame in a filling manner and are used for acquiring electroencephalogram potentials, two electrodes at the nose support position are reference electrodes, and the rest 4 acquisition points read potential differences between the two electrodes and the reference electrodes, so that electroencephalogram signals of 4 points can be acquired.
3. The brain electricity collection glasses using the dry electrode according to claim 1 or 2, wherein the collection board comprises a main control module, a brain electricity collection module and a wireless module;
the master control module adopts a low-current low-power chip and supports SPI communication and UART communication;
the electroencephalogram acquisition module is connected with the main control module in an SPI communication mode, the dry electrode is connected with the electroencephalogram acquisition module, the potential between the electrode to be measured and the reference electrode is converted into a digital signal through the electroencephalogram acquisition module, and the main control module reads the converted digital signal through the SPI communication;
the wireless module supports UART communication, is connected with the main control module in a UART communication mode and is used for communication between the electroencephalogram acquisition glasses and the data processing terminal, and the main control module receives digital signals of the electroencephalogram acquisition module, packages and packages original values and transmits the original values to the data processing terminal through the wireless module.
4. The brain electricity collection glasses using the dry electrode as claimed in claim 1, wherein the collection board mounting connector is integrally formed with the glasses body frame for mounting the collection board.
5. The electroencephalogram acquisition glasses using the dry electrodes as claimed in claim 1, wherein the wires are routed through internal grooves provided on the frame of the glasses body.
6. The electroencephalogram acquisition glasses using the dry electrodes as claimed in claim 1, wherein the dry electrode mounting interfaces of the two side mirror frames are provided with rotating rods, so that the dry electrodes can be better close to the skin of the human body by adding a degree of freedom.
7. The brain electricity collection glasses using the dry electrode according to claim 3, wherein the main control module of the collection plate is a chip with model number PIC32MX 250128B.
8. The brain electricity collection glasses using the dry electrode according to claim 3, wherein the brain electricity collection module of the collection plate adopts ADS1299 chip.
9. The brain electricity collection glasses using the dry electrodes as claimed in claim 3, wherein the wireless module of the collection board is RFD22301 Bluetooth 4.0 module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011489787.4A CN112603333A (en) | 2020-12-16 | 2020-12-16 | Electroencephalogram acquisition glasses using dry electrodes |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011489787.4A CN112603333A (en) | 2020-12-16 | 2020-12-16 | Electroencephalogram acquisition glasses using dry electrodes |
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| CN112603333A true CN112603333A (en) | 2021-04-06 |
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| CN202011489787.4A Pending CN112603333A (en) | 2020-12-16 | 2020-12-16 | Electroencephalogram acquisition glasses using dry electrodes |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106236088A (en) * | 2016-08-31 | 2016-12-21 | 博睿康科技（常州）股份有限公司 | A kind of electrode for encephalograms |
| CN210843046U (en) * | 2019-09-12 | 2020-06-26 | 中国人民解放军联勤保障部队第九〇〇医院 | Brain wave detection glasses |
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- 2020-12-16 CN CN202011489787.4A patent/CN112603333A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106236088A (en) * | 2016-08-31 | 2016-12-21 | 博睿康科技（常州）股份有限公司 | A kind of electrode for encephalograms |
| CN210843046U (en) * | 2019-09-12 | 2020-06-26 | 中国人民解放军联勤保障部队第九〇〇医院 | Brain wave detection glasses |
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Application publication date: 20210406 |