CN214907097U - Facial myoelectricity detection electrode and detection device - Google Patents
Facial myoelectricity detection electrode and detection device Download PDFInfo
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- CN214907097U CN214907097U CN202120122893.2U CN202120122893U CN214907097U CN 214907097 U CN214907097 U CN 214907097U CN 202120122893 U CN202120122893 U CN 202120122893U CN 214907097 U CN214907097 U CN 214907097U
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Abstract
The utility model relates to a facial flesh electricity detection electrode and detection device, the system includes: the facial myoelectricity detection device comprises a facial myoelectricity detection electrode, a signal conditioning unit, a main control unit, a wireless communication unit, an upper computer unit and a power management unit. The facial myoelectricity detection electrode is a flexible myoelectricity electrode and is used for sensing facial myoelectricity signals of a human body, the signal conditioning unit is used for amplifying and filtering the collected myoelectricity signals, the main control unit is used for collecting the conditioned signals, the collected data are transmitted to the upper computer unit through the wireless communication unit, the upper computer unit is used for processing the collected data through software and completing decoding of the myoelectricity signals and identification of action instructions, and the power management unit is used for supplying power to the device. The utility model provides a pair of facial flesh electricity detection electrode and detection device, portable comfortable, wearable strong, can closely laminate with human skin, realize the surperficial flesh electricity signal acquisition of multichannel.
Description
Technical Field
The utility model belongs to the technical field of intelligence human-computer interaction equipment and specifically relates to a facial flesh electricity detection electrode and detection device.
Background
The surface electromyogram signal is widely applied to a man-machine interaction system as a common human body physiological signal so as to complete the interaction control of systems such as a power-assisted robot and a rehabilitation robot. Due to the reasons of the operator or the requirement of complexity of the operating system, such as facial paralysis patients and high-level paraplegic patients in rehabilitation treatment, the condition that both hands cannot be used often occurs, and the rehabilitation efficiency evaluation and instruction interaction need to be completed through facial myoelectricity.
At present, the electrodes applied to electromyography detection can be roughly divided into three types, including a metal wire dry electrode, a silver chloride electrode and a spring needle electrode, which are widely applied to electromyography signal detection of four limbs of a human body. However, for the detection of facial electromyographic signals, the metal wire dry electrode and the pogo pin electrode cannot be tightly attached to the surface of facial skin in use due to the limited fixing mode, and are difficult to apply. For silver chloride electrodes, such electrodes are generally bonded wet electrodes, the electrode area is generally large, fine detection of complex facial small muscles is difficult to achieve, and in addition, the electrodes are very easily affected by facial actions such as pronunciation, chewing and the like in the long-time wearing process, the electrode is in poor contact and even falls off, so that the loss of collected myoelectric data is caused, and the interaction effect of facial myoelectric instructions is affected. Therefore, an electrode and a device for detecting facial electromyographic signals are needed to meet the requirements of facial electromyographic information acquisition and instruction identification.
SUMMERY OF THE UTILITY MODEL
Not enough to prior art, the utility model provides a facial flesh electricity detection electrode and detection device adopts the design based on flexible extending facial flesh electricity electrode for the system can closely laminate on the skin surface, and the root is along with skin deformation accomplishes the stable collection of flesh electricity signal.
The utility model discloses a realize that the technical scheme that above-mentioned purpose adopted is:
the utility model provides a facial flesh electricity detection electrode, includes a plurality of flesh electricity electrode points, many connecting wires and connector, wherein, links to each other by a conductive connecting line between every flesh electricity electrode point and the connector, links to each other by an insulating connecting line between two arbitrary flesh electricity electrode points.
The myoelectricity electrode points are a plurality of and are round conductive metal disc bodies.
The myoelectricity electrode points are round conductive silver disc bodies.
The connecting line is wavy.
The connector is a multi-core FPC male connector.
The connecting wire is integrated on the flexible FPC board.
The myoelectric electrode points are connected with metal bonding pads on the flexible FPC board through conductive adhesive.
The utility model provides a facial flesh electricity detection device, includes facial flesh electricity detection electrode, signal conditioning unit, main control unit, wireless communication unit and the host computer that the order is connected, still includes the power management unit who is connected with signal conditioning unit, main control unit, wireless communication unit respectively, wherein: facial flesh electricity detection electrode, including a plurality of flesh electricity electrode points, many connecting wires and connector, link to each other by a conducting connection line between every flesh electricity electrode point and the connector, link to each other by an insulating connecting wire between two arbitrary flesh electricity electrode points, and the conditioning unit is connected to the connector.
The signal conditioning unit comprises a blocking network circuit, a pre-amplification circuit, a band-pass filter circuit, a signal amplification circuit and a power frequency trap circuit which are sequentially connected, wherein each circuit is connected with the power management unit, the blocking network circuit is connected with a connector in the facial myoelectricity detection electrode, and the power frequency trap circuit is connected with the main control unit.
The signal conditioning unit is arranged in the closed metal shell.
The utility model has the following beneficial effects and advantages:
the utility model provides a facial myoelectricity detection electrode and a detection device, which are portable and comfortable and can effectively adapt to the acquisition demand of facial myoelectricity signals; the provided facial myoelectric electrode has a flexible and extensible function, can be stably attached to the surface of skin to deform along with the skin, and realizes stable detection of facial myoelectric signals.
Drawings
FIG. 1 is a schematic block diagram of the facial myoelectricity detection device of the present invention;
fig. 2 is a schematic diagram of the structure of the facial myoelectricity detection electrode of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention can be embodied in many other forms than those specifically described herein, and it will be apparent to those skilled in the art that similar modifications can be made without departing from the spirit and scope of the invention.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
A facial myoelectricity detection electrode and detection device comprises the following parts:
the facial myoelectricity detection device comprises a facial myoelectricity detection electrode, a signal conditioning unit, a main control unit, a wireless communication unit, an upper computer unit and a power management unit; the facial myoelectricity detection electrode, the signal conditioning unit, the main control unit, the wireless communication unit and the upper computer unit are sequentially connected, and the power management unit supplies power to the signal conditioning unit, the main control unit and the wireless communication unit.
The number of channels capable of collecting electromyographic signals is 20.
The facial myoelectricity detection electrode is composed of myoelectricity electrode points, a wavy connecting line and a connector, can be attached to the surface of the skin of the face of a human body and can sense facial myoelectricity signals of the human body.
A signal conditioning unit comprising: a blocking network circuit, a pre-amplifying circuit, a band-pass filter circuit, a signal amplifying circuit, a power frequency trap circuit and the like.
And the wireless communication unit completes wireless transmission of the acquired data in a WIFI communication mode.
And the upper computer unit can complete the functions of analyzing, processing and decoding the myoelectric data, identifying facial myoelectric instructions and the like through upper computer software.
And the power supply management unit supplies power to the lithium battery in a power supply mode and comprises a charging function and an over-current protection function.
The facial myoelectricity detection electrode can be tightly attached to the surface of skin and stretched along with skin deformation, so that stable acquisition of acquired signals is realized.
Fig. 1 is a schematic block diagram of a facial myoelectricity detection device according to the present invention;
a facial myoelectricity detection electrode and detection device comprises a facial myoelectricity detection electrode 1, a signal conditioning unit 2, a main control unit 3, a wireless communication unit 4, an upper computer unit 5, a power management unit 6 and the like; the facial myoelectricity detection electrode 1, the signal conditioning unit 2, the main control unit 3, the wireless communication unit 4 and the upper computer unit 5 are sequentially connected, and the power management unit 6 supplies power to the signal conditioning unit 2, the main control unit 3 and the wireless communication unit 4. The facial myoelectricity detection electrode 1 is used as a receptor of a detection device and is used for sensing a surface myoelectricity signal of a human face; the signal conditioning unit 2 is used for conditioning the sensed weak surface electromyographic signals so as to obtain effective and high-quality electromyographic signals; the main control unit 3 collects the conditioned analog electromyographic signals through a high-precision A/D converter, and the number of the collection channels is 20; the collected myoelectric data is transmitted to an upper computer unit 5 through a wireless communication unit 4; the upper computer unit 5 can receive the myoelectric data sent by the wireless communication unit 4 in a WIFI mode, and analyzes the myoelectric data according to a communication protocol; the analyzed data is firstly filtered by an IIR digital trap filter to remove residual power frequency interference in the signal, and then noise in the signal is filtered by a Butterworth band-pass filter; the filtered data is subjected to normalization processing and combined with a maximum area method to finish correction of the category label; then, extracting the characteristics of the corrected data by adopting a sliding window method, wherein the extracted characteristics comprise the average absolute value of myoelectricity, wavelength, the number of zero-crossing points, the change frequency of slope and the like; and finally, according to the extracted features, using a machine learning or deep learning method to complete the identification of the action command. The power management unit 6 is responsible for supplying power to the myoelectricity detection device, and its power supply mode is the lithium cell power supply, and supply voltage is 3.7V, and contains the function of charging and crosses electric protection function, and the interface that charges of device is the micro USB interface, and the accessible is connected modes such as treasured that charges and is accomplished the operation of charging. When the charger overcharges the lithium battery, in order to prevent the lithium battery from exploding due to temperature rise, an over-current protection function is added, the charging voltage of the battery is monitored through a voltage comparator, and when the charging voltage reaches the rated maximum voltage, an MOS (metal oxide semiconductor) tube is started to cut off a charging loop, namely, the overcharge protection function is activated, and charging is stopped.
The signal conditioning unit 2 is composed of five parts, namely a blocking network circuit 2-1, a preamplifier circuit 2-2, a band-pass filter circuit 2-3, a signal amplifier circuit 2-4, a power frequency trap circuit 2-5 and the like. The blocking network 2-1 adopts a high-pass network design and is used for eliminating the influence caused by the polarization voltage; the preamplifier circuit 2-2 is composed of an operational amplifier for a low-noise, low-drift and high-common-mode rejection ratio instrument, and is used for improving the input impedance of a system and reducing noise introduced by a detection device; the band-pass filter circuit 2-3 consists of a second-order active Butterworth type high-pass filter and a second-order active Butterworth type low-pass filter, the cut-off frequencies are respectively 10Hz and 500Hz, and the band-pass filter is used for filtering high-frequency noise and low-frequency noise outside the effective frequency range of the electromyographic signals; the signal amplification circuit 2-4 is used for the hierarchical amplification of the surface electromyographic signals, and because the electromyographic signals belong to weak physiological signals, the signals need to be amplified in multiple stages, so that the phenomenon of saturation of the signal output end is avoided; the power frequency trap circuit 2-5 is composed of double T-shaped trap circuits, the cut-off frequency of the circuits is 50Hz, and the power frequency trap circuits are used for reducing power frequency interference introduced by an external environment. The whole signal conditioning unit 2 wraps the circuit board through the metal shell in the device integration installation process so as to achieve the purpose of electromagnetic shielding.
Fig. 2 is a schematic view of the facial myoelectricity detection electrode of the present invention;
the facial myoelectricity detection electrode is composed of myoelectricity electrode points 1-1, a wavy connecting line 1-2 and a connector 1-3, and can be matched with a flexible silica gel substrate or intramuscular effect sticking cloth, is stuck to the surface of facial muscles of a human body and is used for sensing facial myoelectricity signals of the human body. The myoelectric electrode point 1-1 is composed of 10 circular conductive metal discs with the diameter of 1cm, the selected material is metal silver, the electrode thickness is 0.4mm, the electrode is connected with a metal bonding pad of a flexible FPC board through conductive adhesive, the metal bonding pad of the FPC board is subjected to surface treatment by adopting a metal immersion process, the myoelectric electrode point 1-1 is directly attached to the surface of skin, and a facial myoelectric signal is detected; the metal conductor wire in the flexible FPC board is a wavy connecting wire 1-2 and is used for connecting the myoelectric electrode points 1-1 and the connectors 1-3, any myoelectric electrode point is connected with the connectors through a conductive connecting wire, and any two myoelectric electrode points are connected through an insulating connecting wire. The connecting line is designed in a wave shape, so that the connecting line forms a plane spring structure, and can generate corresponding deformation in the process that the electrode is stretched along with the skin deformation, thereby realizing stable electromyographic signal acquisition; the connector 1-3 is composed of a 10-core FPC male connector with a distance of 1mm and is used for connecting the facial myoelectricity detection electrode 1 and the signal conditioning unit 2.
The myoelectric electrode point 1-1 of the utility model is adhered to the human face muscle group distribution position one-to-one, including the smiley muscle, the lower angulus oris, the lower labial muscle, the zygomatic greater muscle, the zygomatic lesser muscle and the upper labial muscle. When the facial action command is identified, the muscle group can directly influence the facial action of the whole human body, so that the adoption of the electrode-muscle corresponding design mode can enable the facial myoelectricity detection to be more accurate. The utility model discloses in contain two same above-mentioned facial flesh electricity detection electrodes altogether, place respectively in the left and right sides face both sides, combine facial flesh electricity detection device, can effectively realize human facial flesh electricity signal's detection and facial flesh electricity action instruction's discernment.
Claims (10)
1. The facial myoelectricity detection electrode is characterized by comprising a plurality of myoelectricity electrode points (1-1), a plurality of connecting lines (1-2) and connectors (1-3), wherein each myoelectricity electrode point (1-1) is connected with each connector (1-3) through one conductive connecting line (1-2), and any two myoelectricity electrode points (1-1) are connected through one insulating connecting line (1-2).
2. The facial myoelectricity detection electrode according to claim 1, wherein the number of myoelectricity electrode points (1-1) is multiple, and the myoelectricity electrode points (1-1) are circular conductive metal disc bodies.
3. The facial myoelectricity detection electrode according to claim 1 or 2, wherein the myoelectricity electrode points (1-1) are circular conductive silver discs.
4. A facial myoelectric detection electrode according to claim 1 characterized in that the connecting wires (1-2) are wave shaped.
5. The facial myoelectricity detection electrode according to claim 1, wherein the connector (1-3) is a multi-core FPC male connector.
6. A facial myoelectric detection electrode according to claim 1 characterized in that the connection wires (1-2) are integrated on a flexible FPC board.
7. The facial myoelectricity detection electrode according to claim 1, wherein the myoelectricity electrode points (1-1) are connected with metal pads on a flexible FPC board through conductive adhesive.
8. The utility model provides a facial flesh electricity detection device, its characterized in that includes facial flesh electricity detection electrode (1), signal conditioning unit (2), main control unit (3), wireless communication unit (4) and host computer (5) that the order is connected, still includes power management unit (6) of being connected with signal conditioning unit (2), main control unit (3), wireless communication unit (4) respectively, wherein: facial myoelectricity detection electrode (1) includes a plurality of myoelectricity electrode points (1-1), many connecting wires (1-2) and connector (1-3), links to each other by a conducting connection line (1-2) between every myoelectricity electrode point (1-1) and connector (1-3), links to each other by an insulating connecting wire (1-2) between two arbitrary myoelectricity electrode points (1-1), and conditioning unit is connected in connector (1-3).
9. The facial myoelectricity detection device according to claim 8, wherein the signal conditioning unit (2) comprises a blocking network circuit (2-1), a preamplifier circuit (2-2), a band-pass filter circuit (2-3), a signal amplifier circuit (2-4) and a power frequency trap circuit (2-5) which are connected in sequence, wherein each circuit is connected with the power management unit (6), the blocking network circuit (2-1) is connected with a connector (1-3) in the facial myoelectricity detection electrode (1), and the power frequency trap circuit (2-5) is connected with the main control unit (3).
10. A facial myoelectric detection device according to claim 8 characterised in that the signal conditioning unit (2) is located within a closed metal housing.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120122893.2U CN214907097U (en) | 2021-01-18 | 2021-01-18 | Facial myoelectricity detection electrode and detection device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120122893.2U CN214907097U (en) | 2021-01-18 | 2021-01-18 | Facial myoelectricity detection electrode and detection device |
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| CN214907097U true CN214907097U (en) | 2021-11-30 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114376881A (en) * | 2021-12-14 | 2022-04-22 | 深圳先进技术研究院 | Pneumatic rehabilitation auxiliary glove |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114376881A (en) * | 2021-12-14 | 2022-04-22 | 深圳先进技术研究院 | Pneumatic rehabilitation auxiliary glove |
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