CN110710978A - Multi-mode immersive synchronous acquisition system based on eye movement tracking-brain function activity detection - Google Patents
Multi-mode immersive synchronous acquisition system based on eye movement tracking-brain function activity detection Download PDFInfo
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Abstract
The invention discloses a multi-mode immersive synchronous acquisition system based on eye movement tracking-brain function activity detection, which comprises VR display equipment, wherein a display module, an eye movement acquisition module, a brain blood oxygen acquisition module and a communication module are arranged in the VR display equipment, the eye movement acquisition module is used for acquiring an image of a tested eye, the brain blood oxygen acquisition module is used for acquiring a brain blood oxygen signal of the tested head, and the VR display equipment, the eye movement acquisition module and the brain blood oxygen acquisition module realize data transmission and clock synchronization with external terminal equipment through the communication module respectively. The VR display equipment with virtual immersion experience is adopted in the whole acquisition system, the whole test and data acquisition process can completely avoid the interference of the outside to the tested person, meanwhile, the invention gives consideration to the synchronous acquisition of the eye movement and the cerebral blood oxygen signals, directly transmits the data with the external terminal equipment through the communication module, and solves the problems of real-time characteristics and the synchronism of multi-mode signals by adopting a clock synchronization mode.
Description
Technical Field
The invention relates to the technical field of cognitive neuroscience, in particular to a multi-mode immersive synchronous acquisition device based on eye movement tracking-brain function activity detection.
Background
Electroencephalograms (EEG) are spontaneous and rhythmic electrical activities of brain cell populations recorded by electrodes, contain a large amount of physiological and pathological information, and are one of the nerve function examination methods. The electroencephalogram reflects the electrical activity and various functional states of brain tissues, the basic characteristics of the electroencephalogram comprise amplitude, period, phase and the like, and the electroencephalogram signals of specific positions can also reflect the condition of cognitive ability. The eye tracking technology is a technology for estimating the direction and position of a human visual line by measuring the motion condition of human pupils through eye movement measuring equipment. The eye tracking technology can be used for various applications, such as automobiles, and detecting the fatigue condition of drivers; in the cognitive domain, the psychological activities of a user are analyzed by tracking the gaze of the user.
In the prior art, only a single technical means is used for acquiring parameters related to brain functions, for example, a user browses a page to be evaluated during testing, eye movement data acquisition equipment is used for acquiring the fixation position of the user on the page to be evaluated and the fixation time used when fixation is performed at each fixation position, and the fixation position of the user can be recorded in a fixation coordinate form or a fixation contour form. The accuracy of brain function detection is affected by external interference when browsing the page to be evaluated.
In order to comprehensively carry out multi-parameter detection on the cognitive nerves of people, a multi-type parameter acquisition and multi-mode detection which can realize the brain function and the cognitive function of people by combining the modern electroencephalogram technology and the eye movement tracking technology is urgently needed, and more comprehensive parameters are provided for brain function analysis.
Disclosure of Invention
The invention provides a multi-mode immersive synchronous acquisition system based on eye tracking-brain function activity detection, aiming at the technical problems that interference exists when data acquisition is carried out on cognitive neural parameters and the accuracy of brain function analysis and detection is influenced.
The invention adopts the following technical scheme:
the multi-mode immersive synchronous acquisition system based on eye movement tracking-brain function activity detection is characterized by comprising a VR display device worn on the head, wherein a display module, an eye movement acquisition module, a brain blood oxygen acquisition module and a communication module are arranged in the VR display device, the eye movement acquisition module is used for acquiring an image of a tested eye, the brain blood oxygen acquisition module is used for acquiring a brain blood oxygen signal of the tested head, and the VR display device, the eye movement acquisition module and the brain blood oxygen acquisition module realize data transmission and clock synchronization with an external terminal device through the communication module respectively.
The eye movement acquisition module comprises a plurality of near-infrared light lamps and a plurality of near-infrared cameras, the near-infrared light lamps surround the edge area of the display module to form a near-infrared light array, and the near-infrared cameras are located at the eye ground positions of the VR display equipment.
The cerebral blood oxygen collection module comprises a probe light source module and a probe photosite, wherein the probe light source module and the probe photosite are arranged at the forehead position of the VR display device; the probe light source module is used for irradiating infrared rays to the skin of a tested person, the light sensing points of the probe receive reflected light of human tissues irradiated by the probe light source module at different angles, optical signals are converted into electric signals, and the electric signals are transmitted to external terminal equipment through the communication module to be processed.
An electroencephalogram sensor used for collecting electroencephalogram signals of a forehead area is further arranged above a display module of the VR display device, and the electroencephalogram sensor transmits the collected electroencephalogram signals to an external terminal device through the communication module to be processed.
The probe light source emits red light and infrared light, and the light-emitting wave band is 600-900 nm.
The system further comprises an electroencephalogram acquisition device, the electroencephalogram acquisition device is connected with the VR display equipment and used for acquiring electroencephalogram signals of the head to be tested, and the electroencephalogram acquisition device is used for realizing data transmission with external terminal equipment through the communication module.
The electroencephalogram acquisition device is of a cap-type structure and comprises a plurality of electrodes and a signal processor connected with the electrodes, the electrodes acquire tested electroencephalogram information, the electroencephalogram information is subjected to hardware filtering, signal enhancement and analog-to-digital conversion through the signal processor, and the signal processor transmits data between the communication module and external terminal equipment.
The electrodes are AgCl electrodes which are distributed in a specific area of the head of a person and are used for collecting the electroencephalogram signals to be tested.
The communication module is a universal data interface for carrying out data transmission and clock synchronization with wired USB port data.
The communication module is a Bluetooth communication module, and wireless data transmission and clock synchronization can be realized between the communication module and external terminal equipment.
The technical scheme of the invention has the following advantages:
A. the VR display equipment with virtual immersion experience is adopted in the whole acquisition system, the whole test and data acquisition process can completely avoid the interference of the outside to the tested person, meanwhile, the invention gives consideration to the synchronous acquisition of the eye movement and the cerebral blood oxygen signals, directly transmits the data with the external terminal equipment through the communication module, and solves the problems of real-time characteristics and the synchronism of multi-mode signals by adopting a clock synchronization mode.
B. According to the invention, through data acquisition of electroencephalogram signals, eye movement signals and cerebral blood oxygen signals, the external equipment can provide more comprehensive parameters for brain function analysis through various acquired brain function signals, so that the cognition of people is more accurately evaluated.
C. The invention integrates the eye movement acquisition module, the brain blood oxygen acquisition module, the brain electricity acquisition device and the VR display equipment together, and synchronously transmits various types of acquired signals to external terminal equipment for data analysis in a wireless or wired data transmission mode, so that the whole detection is more convenient and the efficiency is higher.
Drawings
In order to more clearly illustrate the embodiments of the present invention, the drawings which are needed to be used in the embodiments will be briefly described below, and it is apparent that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained from the drawings without inventive labor to those skilled in the art.
FIG. 1 is a schematic structural diagram of a synchronous acquisition system provided by the present invention;
FIG. 2 is a schematic structural diagram of an electroencephalogram acquisition device;
fig. 3 is a physical topology diagram of the system provided by the present invention.
The labels in the figure are as follows:
1-VR display device; 11-a display module, 12-an eye movement acquisition module, 121-a near-infrared light lamp, 122-a near-infrared camera, 13-a brain blood oxygen acquisition module, 131-a probe light source module and 132-a probe photosite;
2-an electroencephalogram acquisition device, 21-electrodes and 22-a signal processor;
3-an electroencephalogram sensor.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 3, the present invention provides a multi-modal immersive synchronous acquisition system based on eye tracking-brain function activity detection, which includes a VR display device 1, a display module 11, an eye movement acquisition module 12, a brain blood oxygen acquisition module 13, and a communication module are built in the VR display device 1, the eye movement acquisition module 12 is used for acquiring an eye image of a subject, the brain blood oxygen acquisition module 13 is used for acquiring a brain blood oxygen signal of the head of the subject, and the VR display device 1, the eye movement acquisition module 12, and the brain blood oxygen acquisition module 13 respectively implement data transmission and clock synchronization with an external terminal device through the communication module. The VR display equipment with virtual immersion experience is adopted in the whole acquisition system, a tested person watches stimulating materials such as videos or pictures and the like through the virtual reality presentation equipment worn on eyes and the built-in color display module, and the whole test and data acquisition process can completely avoid the interference of the outside to the tested person; the invention also considers the synchronous acquisition of the eye movement and the cerebral blood oxygen signals, the communication module directly transmits data with external terminal equipment (such as a computer), and the problem of synchronism of real-time characteristics and multi-mode signals is solved by adopting a clock synchronization mode, so that various types of data are synchronously transmitted.
The eye movement collecting module 12 preferably includes a plurality of near-infrared light lamps 121 and a near-infrared camera 122, the plurality of near-infrared light lamps 121 surround the edge area of the display module 11 to form a near-infrared light array, the near-infrared camera 122 is located at the fundus position of the VR display device 1, and the collected original eye images are transmitted to a computer for processing through the communication module. Because the eye area is dark when wearing the VR display device, the eye area needs to be additionally illuminated to collect pupil information. The near infrared light is characterized by being invisible light and not affecting human eyes. Meanwhile, the screen viewed by the user is very close to the eye region, the brightness of the screen can interfere with the acquisition of eye images, the visible light wave bands are completely filtered by the near-infrared camera 22, and only the information illuminated by the near-infrared light is acquired.
The communication module can be a universal data interface, is compatible with different data formats, and can realize data transmission and clock synchronization of a wired USB port. Of course, a bluetooth communication module can be used, and wireless data transmission and clock synchronization can be realized. The communication module is compatible with common communication protocols, and the synchronization function can be performed by a built-in clock or controlled by external terminal equipment.
As shown in fig. 1, the cerebral blood oxygen collection module 13 includes a probe light source module 131 and a probe photosite 132 disposed at the forehead position of the VR display device 1; the probe light source module 131 is used for irradiating infrared rays and near infrared rays to the forehead skin position to be tested, wherein the light emitting waveband is 600-900nm, the probe light sensing point 132 receives reflected light irradiated to the skin to be tested, converts an optical signal into an electrical signal, and transmits the obtained electrical signal to an external terminal device for processing through the communication module. Certainly, as shown in fig. 1, an electroencephalogram sensor 3 for acquiring an electroencephalogram signal of a forehead area may be further disposed above the display module 11 of the VR display device, and the electroencephalogram sensor 3 transmits the acquired electroencephalogram signal to an external terminal device through a communication module for processing.
In addition, further preferably, still be equipped with brain electricity collection system 2 in the system, brain electricity collection system 2 is connected with VR display device 1, can form a whole, and portable and detection for detect the brain electricity signal of examinee's head, brain electricity collection system 2 realizes data transmission with external terminal equipment through communication module. As shown in fig. 2, the electroencephalogram acquisition device 2 is preferably of a cap-type structure, is worn on the head of a person to be tested, and specifically includes a plurality of electrodes 21 and a signal processor 22 connected to the plurality of electrodes 21, the plurality of electrodes 21 are distributed at a specific position on the head of the person to be tested, AgCl electrodes are preferably used to acquire electroencephalogram information of the specific area on the head of the person to be tested, and the electroencephalogram information is subjected to hardware filtering, signal enhancement and analog-to-digital conversion by the signal processor, the signal processor performs data transmission with an external terminal device through a communication module, processes data through the external terminal device, and assesses cognitive ability of the person to be tested.
According to the invention, through the integrated VR display device with the functions of electroencephalogram detection, eye movement tracking and cerebral blood oxygen detection, data acquisition in the aspects of electroencephalogram signals, eye movement signals and cerebral blood oxygen signals is synchronously obtained on the external terminal device, and the external device can provide more comprehensive parameters for brain function analysis through various acquired brain function signals, so that the cognition of people is more accurately evaluated.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are intended to be within the scope of the invention.
Claims (10)
1. The utility model provides a synchronous collection system of multimode immersive based on eye tracking-brain function activity detects, characterized in that, the system is including wearing VR display device (1) at the head, VR display device (1) embeds there are display module (11), eye movement collection module (12), brain blood oxygen collection module (13) and communication module, eye movement collection module (12) are used for gathering the eye image of being tried, brain blood oxygen collection module (13) are used for gathering the brain blood oxygen signal of being tried the head, VR display device (1) and eye movement collection module (12), brain blood oxygen collection module (13) respectively through communication module and external terminal equipment realize data transmission and clock synchronization.
2. The multi-modal immersive synchronous acquisition system based on eye tracking-brain function activity detection according to claim 1, wherein the eye movement acquisition module (12) comprises a plurality of near-infrared light lamps (121) and a near-infrared camera (122), the plurality of near-infrared light lamps (121) forming a near-infrared light array around an edge region of the display module (11), the near-infrared camera (122) being located at a fundus location of the VR display device (1).
3. The multi-modal immersive synchronous acquisition system based on eye tracking-brain functional activity detection according to claim 1, wherein the brain blood oxygen acquisition module (13) comprises a probe light source module (131) and a probe photosite (132) disposed at a forehead position of the VR display device (1); the probe light source module (131) is used for irradiating infrared rays to the skin of a tested person, the probe light sensing points (132) receive reflected light of human tissues irradiated by the probe light source module (131) at different angles, convert optical signals into electric signals and transmit the electric signals to external terminal equipment for processing through the communication module.
4. The multi-modal immersive synchronous acquisition system based on eye tracking-brain function activity detection as claimed in claim 3, wherein an electroencephalogram sensor (3) for acquiring an electroencephalogram signal of a forehead region is further disposed above the display module (11) of the VR display device, and the electroencephalogram sensor (3) transmits the acquired electroencephalogram signal to an external terminal device for processing through the communication module.
5. The multi-modal immersive synchronization acquisition system based on eye tracking-brain function activity detection as claimed in claim 3, wherein the probe light source (131) emits red light and infrared light with a light emitting band of 600-900 nm.
6. The multi-modal immersive synchronous acquisition system based on eye tracking-brain function activity detection as claimed in any one of claims 1 to 5, further comprising an electroencephalogram acquisition device (2) connected to the VR display device (1) for acquiring an electroencephalogram signal of a tested head, wherein the electroencephalogram acquisition device (2) is in data transmission with an external terminal device through the communication module.
7. The multi-modal immersive synchronous acquisition system based on eye tracking-brain function activity detection according to claim 6, wherein the electroencephalogram acquisition device (2) is of a cap structure and comprises a plurality of electrodes (21) and a signal processor (22) connected with the plurality of electrodes (21), the electrodes (21) acquire electroencephalogram information to be tested, and the electroencephalogram information is subjected to hardware filtering, signal enhancement and analog-to-digital conversion through the signal processor (22), and the signal processor (22) performs data transmission with an external terminal device through the communication module.
8. The multi-modal immersive synchronous acquisition system based on eye tracking-brain functional activity detection according to claim 7, wherein said electrodes (21) are AgCl electrodes distributed in a specific region of a human head for acquiring a brain electrical signal under test.
9. The system of claim 1, wherein the communication module is a universal data interface for data transmission and clock synchronization with wired USB port data.
10. The multi-modal immersive synchronous acquisition system based on eye tracking-brain function activity detection according to claim 1, wherein the communication module is a bluetooth communication module, and wireless data transmission and clock synchronization can be realized between the communication module and an external terminal device.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111466922A (en) * | 2020-05-14 | 2020-07-31 | 中科搏锐（北京）科技有限公司 | Adaptive blood oxygen signal acquisition probe, device and method based on near infrared blood oxygen detection |
| CN112842332A (en) * | 2021-02-07 | 2021-05-28 | 中国人民解放军南部战区总医院 | Noninvasive remote cerebral oxygen saturation monitoring device |
| CN113069125A (en) * | 2021-03-18 | 2021-07-06 | 上海趣立信息科技有限公司 | Head-mounted equipment control system, method and medium based on brain wave and eye movement tracking |
| CN113712501A (en) * | 2021-11-03 | 2021-11-30 | 山东中医药大学附属眼科医院 | Method and system for detecting synchronous change of eye and brain data |
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| CN111466922A (en) * | 2020-05-14 | 2020-07-31 | 中科搏锐（北京）科技有限公司 | Adaptive blood oxygen signal acquisition probe, device and method based on near infrared blood oxygen detection |
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| CN113712501A (en) * | 2021-11-03 | 2021-11-30 | 山东中医药大学附属眼科医院 | Method and system for detecting synchronous change of eye and brain data |
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