CN115712350A - Blink communication expression system based on myoelectricity detection and control method - Google Patents
Blink communication expression system based on myoelectricity detection and control method Download PDFInfo
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- CN115712350A CN115712350A CN202211458366.4A CN202211458366A CN115712350A CN 115712350 A CN115712350 A CN 115712350A CN 202211458366 A CN202211458366 A CN 202211458366A CN 115712350 A CN115712350 A CN 115712350A
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Abstract
The invention discloses a blink communication expression system and a control method based on electromyographic detection, which comprises wearing equipment, an eye electromyographic signal acquisition unit, a blink signal analysis module, a blink signal logic instruction table storage and an instruction output feedback interface, wherein the blink signal analysis module is electrically connected with the eye electromyographic signal acquisition unit, the blink signal logic instruction table storage and the instruction output feedback interface; the eye electromyogram signal acquisition unit is used for collecting biological signals, acquiring eye peripheral electromyogram signals of left and right eyes and transmitting the eye electromyogram signals to the blink signal analysis module; the eye blinking signal analysis module is used for detecting and processing electromyographic signals, distinguishing effective active eye blinking electromyographic signals of a subject through algorithm processing, matching the collected effective eye blinking signals with a logic relation between a set eye blinking combination and a corresponding instruction, and outputting a related instruction so as to display the eye blinking signals on an instruction output feedback interface. The invention has simple structure and convenient operation.
Description
Technical Field
The invention relates to the technical field of intelligent wearable equipment, in particular to a blink communication expression system based on myoelectric detection and a control method.
Background
The intelligent wearable device can be used as a human-computer interface to realize machine control and interaction, and can monitor the human health and the environment, and attention is paid to the intelligent wearable device in recent years. However, the existing human-computer interface has poor interaction effect, and further development and application of the intelligent wearable device are hindered.
At present, most interaction modes are based on gestures and voice, however, the interaction modes are not suitable for disabled people such as Amyotrophic Lateral Sclerosis (ALS), high paraplegia and the like or workers with special professions. Because some patients cannot use their hands or speak, they cannot communicate at all by gestures or voice, and furthermore, gestures and voice interaction cannot be applied in a large number of practical applications such as movie theaters or conferences.
And the blinking is a movement mode of disabled people such as Amyotrophic Lateral Sclerosis (ALS), high paraplegia and the like or specially-occupational workers, so that how to know the blinking state to control and realize human-computer interaction is a good choice and is a key interaction mode of next-generation intelligent wearable equipment.
Therefore, there is a blink typing technology, but the existing blink control typing technology is mainly related to image recognition and vision, so that the technology is easily influenced by the environment, the equipment structure is relatively complex, the cost is high, the equipment is not easy to use for some old people patients and the like, and the operability is not strong, so that the improvement is needed.
Disclosure of Invention
The present invention is directed to a blink communication expression system and a control method based on electromyography detection, which are provided to solve the above-mentioned deficiencies of the prior art, and solve the problems of relatively complex blink monitoring equipment, high cost, inconvenient use for some elderly patients, and poor operability of the blink monitoring equipment in the prior art.
In order to achieve the purpose, the blink communication expression system based on the electromyography detection comprises wearing equipment which is sleeved on eyes, an eye electromyography signal acquisition unit, a blink signal analysis module, a blink signal logic instruction table storage and an instruction output feedback interface, wherein the blink signal analysis module is respectively and electrically connected with the eye electromyography signal acquisition unit, the blink signal logic instruction table storage and the instruction output feedback interface; the eye electromyographic signal acquisition unit is used for being placed on the wearing equipment, and is used for collecting biological signals, acquiring eye peripheral electromyographic signals of left eyes and right eyes and transmitting the eye electromyographic signals to the blink signal analysis module; the instruction output feedback interface is used for displaying an instruction output after effective blinking; the blink signal logic instruction list storage is pre-stored with an effective blink signal logic instruction list, and the effective blink signal logic instruction list comprises a logic relation between an effective blink frequency permutation combination of the left eye and the right eye and a corresponding instruction; the eye blinking signal analysis module is used for detecting and processing electromyographic signals, distinguishing effective active eye blinking electromyographic signals of a subject through algorithm processing, matching the collected eye effective eye blinking signals with a logical relationship between a set eye blinking combination and a corresponding instruction, and outputting a related instruction so as to display the eye blinking signals on an instruction output feedback interface.
Preferably, the instruction output feedback interface may be an Led display screen or a Windows interface.
Preferably, the blink permutation combination required for inputting one letter in the effective blink signal logic instruction list is determined by the use frequency of letters, and letters with high use frequency are corresponding to simple left and right blink permutation combinations.
Preferably, the eye electromyographic signal acquisition unit comprises two channels of a left eye and a right eye, and each channel is provided with three electrodes, wherein two electrodes are placed on the upper part of each eye socket as a positive electrode and a negative electrode, and the other electrode is used as a reference electrode and is positioned on the shoulder peak of the shoulder.
Preferably, the electrodes in the eye electromyographic signal acquisition unit are flexible hydrogel electrodes.
Preferably, the blink signal analysis module comprises an instrument amplifier, an operational amplifier and a microcontroller, the instrument amplifier is connected with the eye electromyogram signal acquisition unit and used for amplifying the electromyogram signal, the operational amplifier is electrically connected with the microcontroller, and the microcontroller is connected with the instruction output feedback interface through a bluetooth module. The microcontroller is an STM32 microcontroller.
Preferably, the wearing equipment is safety glasses.
The invention also discloses a control method of the blink communication expression system based on myoelectricity detection, which adopts the blink communication expression system based on myoelectricity detection and comprises the following specific steps:
s1, creating a blink permutation and combination logic instruction list in advance; the blink permutation and combination logic instruction list comprises a logic relation between the valid blink frequency permutation and combination of the left eye and the right eye and the corresponding instruction and is stored;
s2, placing an eye electromyographic signal acquisition unit on the wearing equipment, wherein the eye electromyographic signal acquisition unit comprises two channels, namely a left eye channel and a right eye channel, for each eye, two electrodes are respectively placed at two ends of the supraplicous muscle of each eye to serve as a positive electrode and a negative electrode, a reference electrode is positioned at the shoulder of the shoulder, and the electromyographic signal is obtained by the potential difference between the positive electrode and the negative electrode;
and S3, obtaining the electromyographic signals, performing amplification processing on the electromyographic signals by a blink signal analysis module, obtaining eye electromyographic signals by AD conversion mode conversion, distinguishing active blinking signals and inactive blinking signals, if the obtained inactive blinking signals are not processed, taking the active blinking signals as effective blinking signals if the active blinking signals are obtained, calling a blinking array combination logic instruction list, matching the collected eye effective blinking signals with a logic relation between a set blinking combination and corresponding instructions, and outputting related instructions to realize the function of active blinking alternate expression.
Compared with the prior art, the blink communication expression system and the blink communication expression control method based on the myoelectricity detection have the following technical effects:
the blink communication expression system based on the electromyography detection can effectively distinguish effective active blink electromyography signals of the left eye and the right eye of a subject, and the collected effective blink signals of the eyes are processed and corresponding logic instructions are output through the logic relation between the effective blink frequency permutation and combination of the left eye and the right eye and the corresponding instructions, so that the instructions are output and fed back to the interface for display, and the function of active blink communication expression is realized.
Drawings
FIG. 1 is a schematic connection diagram of a blink communication expression system based on myoelectric detection in this embodiment;
FIG. 2 is a schematic diagram illustrating a connection of a blink signal analysis module according to the present embodiment;
fig. 3 is a schematic diagram showing the position of the electrode on the right channel on the face and the connection with the blink signal analysis module in this embodiment;
FIG. 4 is the original diagram of the eye electromyogram signal when the eye is not actively blinking, which is taken as an example of the left eye;
FIG. 5 is a graph of an effective active blink electromyogram effective to distinguish between left and right eyes of a subject;
FIG. 6 is a diagram of an effective blink permutation combination logic command;
fig. 7 is a schematic structural diagram of the eye electromyogram signal acquisition unit being mounted on a wearing device and wearing the wearing device on eyes.
In the figure: the eye myoelectric signal monitoring system comprises an eye myoelectric signal acquisition unit 1, a blink signal analysis module 2, a command output feedback interface 3, a blink signal logic command table storage 4, an electrode 1-1, an instrument amplifier 2-1, an operational amplifier 2-2, a microcontroller 2-3 and wearing equipment 5.
Detailed Description
The invention is further illustrated by the following figures and examples.
Example (b):
as shown in fig. 1 and 7, the blink communication expression system based on electromyography detection provided in this embodiment includes a wearing device 5 for being sleeved on eyes, the wearing device 5 can be worn on the head as shown in fig. 7, and the whole wearing device 5 plays a role in fixing the eye electromyography signal acquisition unit 1 and beautifying, and simultaneously protects eyes of a person; the eye myoelectric signal acquisition unit 1, the blink signal analysis module 2, the blink signal logic instruction table storage 4 and the instruction output feedback interface 3 are electrically connected, wherein the blink signal analysis module 2 is respectively connected with the eye myoelectric signal acquisition unit 1, the blink signal logic instruction table storage 4 and the instruction output feedback interface 3; the eye electromyographic signal acquisition unit 1 is used for being placed on the wearing equipment 5, and the eye electromyographic signal acquisition unit 1 is used for collecting biological signals, acquiring eye peripheral electromyographic signals of the left eye and the right eye and transmitting the eye electromyographic signals to the blink signal analysis module 2; the instruction output feedback interface 3 is used for displaying an instruction output after effective blinking; the blink signal logic instruction table storage 4 is pre-stored with an effective blink signal logic instruction table, and the effective blink signal logic instruction table comprises a logic relation between an effective blink frequency permutation combination of the left eye and the right eye and a corresponding instruction; the blink signal analysis module 2 is used for detecting and processing electromyographic signals, distinguishing effective active blink electromyographic signals of a subject through algorithm processing, matching the collected effective blink signals of the eyes with the set logical relationship between the blink combination and the corresponding instruction, and outputting the related instruction so as to display the eye blink signals on an instruction output feedback interface.
The instruction output feedback interface 3 in this embodiment may be an Led display screen or a Windows interface.
In this embodiment, the blink array combination required for inputting a letter in the logic command table of valid blink signals is determined by the use frequency of the letter, and the letter with high use frequency is corresponding to the simple left and right blink array combination.
As shown in fig. 3, the eye electromyogram signal acquisition unit 1 in this embodiment includes two channels for the left eye and the right eye, and each channel is provided with three electrodes 1-1, wherein two electrodes are placed on the upper portion of each eye socket as a positive electrode and a negative electrode, and the other electrode is used as a reference electrode, which is located on the shoulder peak of the shoulder.
In this embodiment, the electrode 1-1 in the eye electromyographic signal acquisition unit 1 is a flexible hydrogel electrode.
As shown in fig. 2, preferably, the blink signal analysis module 2 includes an instrument amplifier 2-1, an operational amplifier 2-2 and a microcontroller 2-3, the instrument amplifier 2-1 is connected with the eye electromyogram signal acquisition unit 1 for amplifying the electromyogram signal, the operational amplifier 2-2 is electrically connected with the microcontroller 2-3, and the microcontroller 2-3 is connected with the instruction output feedback interface 3 through a bluetooth module. The microcontrollers 2-3 are STM32 microcontrollers.
The model of the STM32 microcontroller in this embodiment is STM32F1032ET6, so it has an AD conversion function.
The wearing gear 5 described in this embodiment is safety glasses.
The embodiment also discloses a control method of the blink communication expression system based on myoelectricity detection, which adopts the blink communication expression system based on myoelectricity detection in the embodiment and comprises the following specific steps:
s1, creating a blink permutation and combination logic instruction list in advance; the blink permutation and combination logic instruction list comprises a logic relation between the valid blink frequency permutation and combination of the left eye and the right eye and the corresponding instruction and is stored;
s2, placing an eye electromyographic signal acquisition unit 1 on the wearing equipment 5, wherein the eye electromyographic signal acquisition unit 1 has two channels in total, namely a left eye channel and a right eye channel, two electrodes are respectively placed at two ends of the supraplicous muscle of each eye as a positive electrode and a negative electrode, a reference electrode is positioned at the shoulder of the shoulder, and the electromyographic signal is obtained by the potential difference between the positive electrode and the negative electrode;
and S3, obtaining the electromyographic signals, performing amplification processing on the electromyographic signals by the blink signal analysis module 2, obtaining eye electromyographic signals by AD conversion mode conversion, distinguishing active blinking signals and inactive blinking signals, if the obtained inactive blinking signals are not processed, taking the active blinking signals as effective blinking signals if the active blinking signals are obtained, calling a blinking array combination logic instruction list, matching the collected eye effective blinking signals with a logic relation between a set blinking combination and corresponding instructions, and outputting related instructions to realize the function of active blinking alternating current expression.
In this embodiment, the electrode 1-1 is a flexible hydrogel electrode. In the embodiment, the flexible hydrogel electrode is adopted, has high conductivity, has better fit property with skin biological tissues, is designed into an electrode shape by simulating the shape of muscles on the upper part of an orbit, has high flexibility, can move along with the muscles more fittingly, and can acquire more accurate signals.
The non-active blink signals comprise non-blink signals and unconscious blink signals in a natural state, as shown in fig. 4, the blink signal analysis module distinguishes effective active blink electromyographic signals of the testee through algorithm processing, as shown in fig. 5, the collected effective blink signals of eyes are matched with the logic relationship between the set blink combination and the corresponding instructions, and related instructions are output.
Because the acquisition interfaces of the left eye and the right eye connected with the single chip microcomputer are different, the single chip microcomputer can know whether the left eye or the right eye is connected with the left eye or the right eye when acquiring which interface signal.
In this embodiment, the preset electric signal threshold in the single chip microcomputer 4-1 is 1.38V.
The eye blink communication expression system based on the electromyography detection can effectively distinguish effective active blink electromyography signals of the left eye and the right eye of a testee, the collected effective blink signals of the eyes are processed through the logic relation between the effective blink frequency permutation and combination of the left eye and the right eye and corresponding instructions, corresponding logic instructions are output, and therefore the eye blink communication expression system is displayed on an instruction output feedback interface, and the function of active blink communication expression is achieved.
Fig. 6 is a diagram of logic commands of an effective BLINK array combination, where a usage frequency indicates a usage frequency, a BLINK indicates a status BLINK, and a blank indicates a blank, which includes a logic relationship between the array combination of the effective BLINK times of the right eye and the left eye and the corresponding command, and this logic relationship diagram is exemplified, and in a time period, for example, 4 seconds is a period, the BLINK signal analysis module detects that the left eye BLINKs 1 time effectively, and the command outputs a letter "e"; for another example, in a certain period, the left eye blinks effectively for 1 time first, and then the right eye blinks for 1 time, and finally the letter "i" is output; for another example, in a certain period, the left eye blinks effectively for 1 time, the right eye blinks effectively for 1 time, and the letter "d" is finally output by an instruction if the right eye blinks effectively for 3 times; for another example, in a certain period, the left eye blinks for 4 times effectively, and finally the letter u is output by an instruction; and so on. Moreover, the blink permutation and combination required by inputting one letter is determined by the use frequency of the letters, the sequence of the letters from top to bottom is the descending order of the use frequency of the letters, the letters with high use frequency correspond to the simple left and right blink permutation and combination, and the fatigue is effectively reduced and the accuracy is improved.
In this embodiment, in order to better distinguish what is an active blink and what is a non-active blink signal, the blink signal analysis module 2 performs a great amount of experiments and blink mode adjustment on the subject in advance, and finally obtains a result that the processed electrical signal larger than 1.38V is used as a determination signal of the active blink, so that the active blink and the non-active blink signals are effectively distinguished (how to specifically determine that the current state belongs to the conventional technology in the field and therefore the specific description is not made), therefore, the invention obtains and detects the blink state, determines whether the blink state is the active blink, calls a prestored effective blink permutation and combination logic instruction diagram if the current state is the active blink, matches the logic relationship between the effective blink permutation and combination logic instruction diagram and the corresponding instruction, and outputs the relevant instruction, so that the problem that the current state cannot be communicated with disabled people such as Amyotrophic Lateral Sclerosis (ALS), high paraplegia or special staff is solved, and the whole structure is relatively simple, low in cost, and convenient to operate.
Claims (9)
1. A blink communication expression system based on myoelectricity detection comprises wearing equipment (5) sleeved on eyes, and is characterized by further comprising an eye myoelectricity signal acquisition unit (1), a blink signal analysis module (2), a blink signal logic instruction table storage (4) and an instruction output feedback interface (3), wherein the blink signal analysis module (2) is electrically connected with the eye myoelectricity signal acquisition unit (1), the blink signal logic instruction table storage (4) and the instruction output feedback interface (3) respectively; the eye electromyogram signal acquisition unit (1) is used for being placed on the wearing equipment (5), and the eye electromyogram signal acquisition unit (1) is used for collecting biological signals, acquiring eye surrounding electromyogram signals of the left eye and the right eye and transmitting the eye electromyogram signals to the blink signal analysis module (2); the instruction output feedback interface (3) is used for displaying an instruction output after effective blinking; an effective blink signal logic instruction list is stored in the blink signal logic instruction list storage (4) in advance, and comprises a logic relation between the effective blink frequency permutation and combination of the left eye and the right eye and the corresponding instruction; the blink signal analysis module (2) is used for detecting and processing electromyographic signals, distinguishing effective active blink electromyographic signals of a subject through algorithm processing, matching the collected effective blink signals of the eyes with the set logic relation between the blink combination and the corresponding instruction, and outputting the related instruction so as to display the eye blink signals on the instruction output feedback interface.
2. A blink communication expression system based on electromyography detection as in claim 1, wherein the command output feedback interface (3) can be an Led screen or a Windows interface.
3. A myoelectric detection based blink communication expression system according to claim 1 or 2, wherein the blink array combination required for inputting a letter in the effective blink signal logic instruction list is determined by the use frequency of the letter, and the letter with high use frequency is corresponding to the simple left and right blink array combination.
4. A blink alternating current expression system based on electromyography detection as claimed in claim 3, wherein the eye electromyography signal acquisition unit (1) comprises two channels for the left and right eye, and each channel is provided with three electrodes (1-1), wherein two electrodes are placed on the upper part of each orbit as positive and negative electrodes, and the other electrode is used as a reference electrode, which is located at the acromion of the shoulder.
5. A blink alternating current expression system based on electromyography detection as claimed in claim 4, wherein the electrodes (1-1) in the eye electromyography signal acquisition unit (1) are flexible hydrogel electrodes.
6. A blink alternating current expression system based on myoelectricity detection as claimed in claim 5, wherein the blink signal analysis module (2) comprises an instrumentation amplifier (2-1), an operational amplifier (2-2) and a microcontroller (2-3), the instrumentation amplifier (2-1) is connected with the eye myoelectricity signal acquisition unit (1) for amplifying the myoelectricity signal, the operational amplifier (2-2) is electrically connected with the microcontroller (2-3), and the microcontroller (2-3) is connected with the instruction output feedback interface (3) through a Bluetooth module.
7. A blink alternating current representation system based on electromyography detection according to claim 6, characterized in that the microcontroller (2-3) is an STM32 microcontroller.
8. A blink communication expression system based on electromyography detection according to claim 7, characterized in that the wearing equipment (5) is safety glasses.
9. A control method of blink communication expression system based on electromyography detection, comprising the blink communication expression system based on electromyography detection as claimed in any one of the claims 1 to 7,
the method comprises the following specific steps:
s1, creating a blink permutation and combination logic instruction list in advance; the blink permutation and combination logic instruction list comprises a logic relation between the valid blink frequency permutation and combination of the left eye and the right eye and a corresponding instruction, and the logic relation is stored;
s2, an eye electromyographic signal acquisition unit (1) is placed on the wearing equipment (5), the eye electromyographic signal acquisition unit (1) has two channels in total, namely a left eye channel and a right eye channel, for each eye, two electrodes are respectively placed at two ends of the supraplicous muscle of each eye to serve as a positive electrode and a negative electrode, a reference electrode is positioned on the shoulder of the shoulder, and the electromyographic signal is obtained by potential difference between the positive electrode and the negative electrode;
and S3, obtaining the electromyographic signals, performing amplification processing on the electromyographic signals by a blink signal analysis module (2), obtaining eye electromyographic signals by AD conversion mode conversion, distinguishing active blinking signals and inactive blinking signals, if the obtained inactive blinking signals are not processed, taking the active blinking signals as effective blinking signals if the obtained active blinking signals are obtained, calling a blinking array combination logic instruction list, matching the collected eye effective blinking signals with the set logical relationship between the blinking combination and corresponding instructions, and outputting related instructions to realize the function of active blinking alternating expression.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116671900A (en) * | 2023-05-17 | 2023-09-01 | 安徽理工大学 | Blink recognition and control method based on brain wave instrument |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116671900A (en) * | 2023-05-17 | 2023-09-01 | 安徽理工大学 | Blink recognition and control method based on brain wave instrument |
| CN116671900B (en) * | 2023-05-17 | 2024-03-19 | 安徽理工大学 | Blink recognition and control method based on brain wave instrument |
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