Language recognition system

Abstract

The application discloses a language recognition system, comprising: a flexible base, which is provided with: a flexible electrode module, comprising a surface electrode and a wire, both of which are arranged on the flexible base, one end of the wire being connected with the surface electrode and being adapted to collect and transmit an electromyographic signal generated by throat muscle movement; a flexible circuit module, comprising a flexible circuit board, a flexible packaging material and a power supply part, the flexible circuit board being arranged on the flexible base, the flexible packaging material being arranged on the flexible circuit board, the flexible circuit board comprising a data acquisition circuit and a wireless transmission part, the data acquisition circuit being connected with the other end of the wire, the wireless transmission part being connected with the data acquisition circuit and being adapted to receive, process and transmit the electromyographic signal, and the power supply part being adapted to supply power for the flexible circuit board; and a signal recognition module, which is connected with the wireless transmission part and is adapted to perform signal cleaning, feature extraction and language recognition on the electromyographic signal processed and transmitted by the flexible circuit module.

Description

Technical Field

[0001] The present invention belongs to the technical field of language recognition, and in particular, relates to a language recognition system. Background Art

[0002] Speech recognition is a method that collects spoken speech and analyzes its signals. Current speech recognition methods all rely on voice recording. However, in some situations where sound is inconvenient, silent information transmission is required, such as between soldiers. When a person speaks, mouth movements cause the laryngeal muscles to contract and expand. In this case, even without producing sound, simply making the same mouth shape as the intended sound will cause corresponding movement of the laryngeal muscles, primarily the suprahyoid and infrahyoid muscles. Because different mouth shapes correspond to different laryngeal muscle movements, analyzing the electromyographic signals generated by these laryngeal muscles can identify the corresponding speech. Conventional technology uses traditional electrodes to detect myoelectric signals from the muscles on both sides of the jaw, enabling detection of jaw, tongue, and laryngeal movements. However, these conventional electrodes are bulky and cannot measure myoelectric signals from narrow or curvy areas of the body, such as the larynx. They cannot be worn for extended periods, making real-time detection of laryngeal myoelectric signals impossible. Furthermore, signal transmission issues result in poor adaptability of the overall system.

[0003] Therefore, existing language recognition technology needs to be further improved. Summary of the Invention

[0004] The present invention aims to at least partially address one of the technical problems in the related art. To this end, one object of the present invention is to provide a speech recognition system. This system comprises a flexible device comprising a flexible electrode module and a flexible circuit module that conforms completely to the skin. This device can be worn comfortably and for extended periods without falling off. It also features high transparency, good concealment, and is unobtrusive, making it suitable for use in sports settings. Furthermore, the system utilizes only laryngeal electromyographic signals, without the need for vocalization, to achieve speech recognition.

[0005] In one aspect of the present invention, the present invention provides a language recognition system. According to an embodiment of the present invention, the system includes:

[0006] A flexible substrate, wherein the flexible substrate is provided with:

[0007] A flexible electrode module, comprising a surface electrode and a wire, both of which are disposed on the flexible substrate, one end of the wire being connected to the surface electrode and adapted to collect and transmit myoelectric signals generated by laryngeal muscle movement;

[0008] A flexible circuit module, comprising a flexible circuit board, a flexible packaging material, and a power supply unit. The flexible circuit board is disposed on the flexible substrate, the flexible packaging material is disposed on the flexible circuit board, the flexible circuit board comprises a data acquisition circuit and a wireless transmission unit, the data acquisition circuit is connected to the other end of the wire, the wireless transmission unit is connected to the data acquisition circuit and is suitable for receiving, processing, and transmitting the electromyographic signal, and the power supply unit supplies power to the flexible circuit board;

[0009] A signal recognition module is connected to the wireless transmission unit and is suitable for performing signal cleaning, feature extraction and language recognition on the electromyographic signal processed and transmitted by the flexible circuit module.

[0010] According to the speech recognition system of the embodiment of the present invention, the flexible electrode module and the flexible circuit module of the system are both arranged on a flexible substrate, and are flexible as a whole and suitable for being attached to the throat of the human body. When the human mouth makes the mouth shape corresponding to the speech, although no sound is made, it will drive the throat muscles to move, and the surface electrodes can collect the electromyographic signals generated by the throat muscle movement. Moreover, the surface electrodes in the flexible electrode module of the present application are significantly thinner than traditional electrodes, and can better fit the epidermis, thereby realizing the collection of electromyographic signals of small areas, large curvatures, and large deformation positions of the epidermis; the above-mentioned electromyographic signals can be sent to the data acquisition circuit in the flexible circuit board through wires, and the wires in the flexible electrode module of the present application can greatly improve the surface The surface electrode is extensible; further, in the flexible circuit module, the data acquisition circuit receives the electromyographic signal transmitted by the wire, processes the received electromyographic signal, and transmits it through the wireless transmission unit to achieve wearable function and adapt to occasions such as sports where traditional electrodes cannot be used. At the same time, the power supply unit supplies power to the flexible circuit board, which is suitable for wearable applications; the flexible circuit board itself has flexibility, and the flexible packaging material is encapsulated on the outer surface of the flexible circuit board, which not only plays a protective role but also makes the overall structure of the flexible circuit module more flexible; the signal recognition module can perform signal cleaning, feature extraction and language recognition on the processed electromyographic signal transmitted by the wireless transmission unit, and finally realize language recognition. As a result, the system has a flexible device that is completely in contact with the skin, including a flexible electrode module and a flexible circuit module. It can be worn comfortably for a long time without falling off, and the overall transparency is high, concealed, and inconspicuous, which is suitable for sports scenes; at the same time, the system can realize language recognition function by only using the electromyographic signal of the throat and without making a sound.

[0011] In addition, the language recognition system according to the above embodiment of the present invention may also have the following additional technical features:

[0012] In some embodiments of the present invention, the surface electrode and the wire both include a gasket layer and a conductive layer, and the gasket layer of the wire is connected to the gasket layer of the surface electrode, and the conductive layer of the wire is connected to the conductive layer of the surface electrode, the gasket layer is arranged on the flexible substrate, and the conductive layer is arranged on the gasket layer; the wire also includes a protective layer, and the protective layer is arranged on the conductive layer of the wire.

[0013] In some embodiments of the present invention, the gasket layer of the wire and the gasket layer of the surface electrode are integrally formed, and the conductive layer of the wire and the conductive layer of the surface electrode are integrally formed.

[0014] In some embodiments of the present invention, the gasket layer, the conductive layer, and the protective layer of the conductive wire have the same shape.

[0015] In some embodiments of the present invention, the spacer layer and the conductive layer of the surface electrode have the same shape.

[0016] In some embodiments of the present invention, the conductive wire extends in a meandering manner on the flexible substrate.

[0017] In some embodiments of the present invention, the surface electrode has a filamentous meandering structure.

[0018] In some embodiments of the present invention, the thickness of the flexible substrate is 50-300 μm.

[0019] In some embodiments of the present invention, the thickness of the spacer layer of the surface electrode and the spacer layer of the conductive line are independently 3-50 μm.

[0020] In some embodiments of the present invention, the thickness of the conductive layer of the surface electrode and the conductive layer of the wire are independently 85-320 nm.

[0021] In some embodiments of the present invention, the thickness of the protective layer is 3-50 μm.

[0022] In some embodiments of the present invention, the gasket layer and the protective layer are made of polyimide.

[0023] In some embodiments of the present invention, the total thickness of the flexible substrate and the flexible electrode module is 50-500 μm.

[0024] In some embodiments of the present invention, the conductive layers in the surface electrode and the wire both include a first metal layer and a second metal layer, the first metal layer is arranged on the gasket layer of the surface electrode and the gasket layer of the wire, the second metal layer is arranged on the first metal layer, and the protective layer of the wire is arranged on the second metal layer of the wire.

[0025] In some embodiments of the present invention, the thickness of the first metal layer in the surface electrode and the first metal layer in the wire are independently 5-20 nm.

[0026] In some embodiments of the present invention, the thickness of the second metal layer in the surface electrode and the second metal layer in the wire are independently 80-300 nm.

[0027] In some embodiments of the present invention, the first metal layer is a chromium metal layer, and the second metal layer is a gold metal layer.

[0028] In some embodiments of the present invention, the flexible packaging material and the flexible substrate are made of materials independently selected from at least one of a dressing composed of a polyurethane film and an acrylic adhesive, a polyimide film, polydimethylsiloxane, and a hydrogel.

[0029] In some embodiments of the present invention, the thickness of the flexible circuit board is 0.1-0.5 mm.

[0030] In some embodiments of the present invention, the overall thickness of the flexible circuit board, the flexible packaging material, and the flexible substrate is 0.5-1.5 mm.

[0031] In some embodiments of the present invention, the data acquisition circuit includes an instrument amplifier circuit, a high-pass filter circuit, a low-pass filter circuit, and an ADC acquisition circuit connected in sequence, the instrument amplifier circuit is connected to the other end of the wire, and the data acquisition circuit also includes a drive circuit, which is connected to the instrument amplifier circuit.

[0032] In some embodiments of the present invention, the wireless transmission unit is selected from at least one of Bluetooth, near field communication, and wireless broadband.

[0033] In some embodiments of the present invention, the power supply unit is a lithium battery, and the thickness of the lithium battery is less than 0.5 mm.

[0034] In some embodiments of the present invention, the signal recognition module uses an acoustic model and / or a neural network model to implement the recognition function.

[0035] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments with reference to the accompanying drawings, in which:

[0037] Figure 1 FIG. 4 is a schematic diagram of the structure of a language recognition system according to an embodiment of the present invention. DETAILED DESCRIPTION

[0038] The following describes embodiments of the present invention in detail, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and are not to be construed as limiting the present invention.

[0039] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0040] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0041] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0042] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0043] In one aspect of the present invention, the present invention provides a language recognition system. According to an embodiment of the present invention, referring to Figure 1 The system includes: a flexible substrate 100, a flexible electrode module 200, a flexible circuit module 300 and a signal recognition module 400.

[0044] According to an embodiment of the present invention, a flexible electrode module 200 and a flexible circuit module 300 are provided on a flexible substrate 100. It should be noted that the flexible electrode module and the flexible circuit module can share a flexible substrate or be provided on separate, unconnected flexible substrates. Those skilled in the art can make a selection based on actual needs. According to one embodiment of the present invention, the total thickness of the flexible substrate and the flexible electrode module, and the thickness of the flexible substrate are not particularly limited. Those skilled in the art can make a selection based on actual needs. For example, the thickness of the flexible substrate can be 50-300 μm, specifically, 50 μm / 100 μm / 150 μm / 200 μm / 250 μm / 300 μm. Furthermore, the total thickness of the flexible substrate and the flexible electrode module can be 50-500 μm, specifically, 50 μm / 100 μm / 150 μm / 200 μm / 250 μm / 300 μm / 350 μm / 400 μm / 450 μm / 500 μm. The inventors have found that the minimum thickness of the flexible electrode module is mainly limited by the manufacturing process. In actual use, the thinner the thickness of the flexible electrode module, the better, as it is more conducive to the flexible electrode module being conformally attached to the skin surface. According to another embodiment of the present invention, the material of the flexible substrate is also not particularly limited. For example, it can be selected from at least one of a dressing composed of a polyurethane film and an acrylic adhesive, a polyimide film, polydimethylsiloxane, and a hydrogel. The inventors have found that the above-mentioned material is thin, transparent, and has good bendability, ductility, flexibility, and biocompatibility.

[0045] According to an embodiment of the present invention, the flexible electrode module 200 includes a surface electrode 210 and a wire 220, both of which are arranged on a flexible substrate 100, one end of the wire 220 being connected to the surface electrode 210 and being suitable for collecting and transmitting electromyographic signals generated by laryngeal muscle movement. The inventors have found that the flexible electrode module is arranged on a flexible substrate and is flexible as a whole, suitable for being attached to the human throat. When a person's mouth makes a mouth shape corresponding to a speech, although no sound is produced, it drives the laryngeal muscles to move, and the surface electrode can collect the electromyographic signals generated by the laryngeal muscle movement. Moreover, the surface electrode in the flexible electrode module of the present application is significantly thinner than that of traditional electrodes, and can better fit the epidermis, realizing the collection of electromyographic signals from small areas, large curvatures, and large deformations of the epidermis; the above electromyographic signals can be sent to the data acquisition circuit in the flexible circuit board through the wire, and the wire in the flexible electrode module of the present application can greatly improve the ductility of the surface electrode.

[0046] According to one embodiment of the present invention, the specific structure of the surface electrode and the wire is not particularly limited, and those skilled in the art can select them according to actual needs. For example, both can include a gasket layer and a conductive layer, and the gasket layer of the wire is connected to the gasket layer of the surface electrode, and the conductive layer of the wire is connected to the conductive layer of the surface electrode. The gasket layer is arranged on a flexible substrate, and the conductive layer is arranged on the gasket layer; the wire also includes a protective layer, and the protective layer is arranged on the conductive layer of the wire. Specifically, the gasket layer is used to support the conductive layer, and the conductive layer is directly arranged on the gasket layer. The conductive layer of the surface electrode contacts the epidermis to detect the electromyographic signals of the laryngeal muscles. Therefore, the conductive layer of the surface electrode does not need to be covered with a protective layer, and the conductive layer of the wire cannot contact the skin. Therefore, a protective layer is arranged on the conductive layer of the wire to perform packaging and protection.

[0047] According to another embodiment of the present invention, the wire's gasket layer and the surface electrode's gasket layer can be integrally formed, and the wire's conductive layer and the surface electrode's conductive layer can also be integrally formed. Furthermore, the wire's gasket layer, conductive layer, and protective layer can have the same shape; the surface electrode's gasket layer and conductive layer can also have the same shape. This allows the gasket layer to provide support and the protective layer to provide encapsulation and protection.

[0048] According to another embodiment of the present invention, the conductive wire may extend in a meandering shape on the flexible substrate, and the surface electrode may have a filament-like meandering structure, thereby further improving the extensibility of the flexible electrode module.

[0049] According to another embodiment of the present invention, the conductive layers in the surface electrode and the wire may include a first metal layer and a second metal layer, the first metal layer is arranged on the gasket layer of the surface electrode and the gasket layer of the wire, the second metal layer is arranged on the first metal layer, and the protective layer of the wire is arranged on the second metal layer of the wire.

[0050] According to another embodiment of the present invention, the thickness of the gasket layer of the surface electrode and the gasket layer of the wire can be independently 3-50 μm, such as 3 μm / 10 μm / 15 μm / 20 μm / 25 μm / 30 μm / 35 μm / 40 μm / 45 μm / 50 μm; the thickness of the conductive layer of the surface electrode and the conductive layer of the wire can be independently 85-320 nm, such as 85 μm / 100 μm / 150 μm / 200 μm / 250 μm / 300 μm / 320 μm; the thickness of the protective layer can be 3-50 μm, For example, it can be 3μm / 10μm / 15μm / 20μm / 25μm / 30μm / 35μm / 40μm / 45μm / 50μm; the thickness of the first metal layer in the surface electrode and the first metal layer in the wire can be independently 5-20nm, such as 5nm / 10nm / 15nm / 20nm; the thickness of the second metal layer in the surface electrode and the second metal layer in the wire can be independently 80-300nm, such as 80nm / 100nm / 150nm / 200nm / 250nm / 300nm. The inventors found that the minimum thickness of the gasket layer of the surface electrode and the gasket layer of the wire, the conductive layer of the surface electrode, the conductive layer of the wire, the protective layer, the first metal layer in the surface electrode, the first metal layer in the wire, the second metal layer in the surface electrode, and the second metal layer in the wire is mainly limited by the preparation process. In actual use, the smaller the thickness, the better, which is more conducive to the surface electrode and the wire being conformally attached to the skin surface.

[0051] According to another embodiment of the present invention, both the gasket layer and the protective layer can be made of polyimide; the first metal layer can be a chromium metal layer, and the second metal layer can be a gold metal layer. Chromium can improve the adhesion between the second metal layer and the gasket layer; gold provides excellent electrical conductivity and stable material properties.

[0052] According to an embodiment of the present invention, the flexible circuit module 300 includes a flexible circuit board 310, a flexible packaging material (not shown), and a power supply unit 320. The flexible circuit board 310 is disposed on the flexible substrate 100, and the flexible packaging material is disposed on the flexible circuit board 310. The flexible circuit board 310 includes a data acquisition circuit 311 and a wireless transmission unit 312. The data acquisition circuit 311 is connected to the other end of the wire 220, and the wireless transmission unit 312 is connected to the data acquisition circuit 311 and is suitable for receiving, processing, and transmitting electromyographic signals. The power supply unit 320 supplies power to the flexible circuit board 310 and the flexible electrode module 200. The inventors have discovered that in the flexible circuit module, the data acquisition circuit receives the electromyographic signals transmitted by the wire, processes the received electromyographic signals, and transmits them via the wireless transmission unit, thereby achieving wearable functionality and adapting to situations where traditional electrodes are not suitable, such as in motion. At the same time, the power supply unit supplies power to the flexible circuit board, making it suitable for wearable applications. The flexible circuit board itself has bendable properties, and the flexible packaging material is encapsulated on the outer surface of the flexible circuit board, which not only protects it but also makes the overall structure of the flexible circuit module more flexible. Specifically, the data acquisition circuit receives the original electromyographic signal from the surface electrodes and can perform amplification, rectification, filtering and other processing on the electromyographic signal.

[0053] According to one embodiment of the present invention, the material of the flexible packaging material can be independently selected from at least one of a dressing composed of a polyurethane film and an acrylic adhesive, a polyimide film, polydimethylsiloxane, and a hydrogel. The inventors have found that the above-mentioned material is thin, transparent, has good bendability and ductility, good flexibility, and good biocompatibility. According to another embodiment of the present invention, the data acquisition circuit may include an instrument amplifier circuit, a high-pass filter circuit, a low-pass filter circuit, and an ADC acquisition circuit connected in sequence, the instrument amplifier circuit is connected to the other end of the wire, and the data acquisition circuit also includes a drive circuit, which is connected to the instrument amplifier circuit. Specifically, the electromyographic signal is input to the input stage of the instrument amplifier circuit via the wire, and then output through the output stage of the instrument amplifier circuit, and then passes through a high-pass filter, and then passes through a low-pass filter. After filtering and amplification, the signal is collected by the ADC acquisition circuit, and the drive circuit is connected to the human body and the gain adjustment end of the instrument amplifier circuit. The instrumentation amplifier circuit features high common-mode rejection ratio (CMRR), high input impedance, high gain, and low noise. The driver circuit increases the line frequency, removes common-mode interference from the input instrumentation amplifier circuit, and improves the CMRR. High-pass and low-pass filters extract useful electromyographic signals, with frequencies concentrated between 10 and 500 Hz. The ADC acquisition circuit samples the electromyographic signals after pre-amplification, employing a 12-bit ADC with a maximum sampling rate of 1MSPS, ensuring excellent EMG signal detail. Furthermore, the wireless transmission unit can be selected from at least one of Bluetooth, near-field communication, and wireless broadband. For example, the Bluetooth system-on-chip (SoC) chip is responsible for data acquisition and wireless transmission control. Furthermore, the power supply unit can be a lithium battery.

[0054] According to another embodiment of the present invention, the thickness of the flexible circuit board can be 0.1-0.5mm, such as 0.1mm / 0.2mm / 0.3mm / 0.4mm / 0.5mm; the overall thickness of the flexible circuit board, flexible packaging material, and flexible substrate can be 0.5-1.5mm, such as 0.5mm / 0.7mm / 0.9mm / 1.1mm / 1.3mm / 1.5mm; further, the thickness of the lithium battery can be less than 0.5mm. The inventors have found that the minimum thickness of the flexible circuit board and the minimum thickness of the overall thickness of the flexible circuit board, flexible packaging material, and flexible substrate are mainly limited by the manufacturing process. In actual use, the smaller the thickness of the flexible circuit board, the better, as it is more conducive to the flexible circuit board being conformally attached to the skin surface. The smaller the thickness of existing lithium batteries, the smaller their capacity. When selecting a lithium battery of a specific thickness, those skilled in the art can select the minimum thickness while ensuring that the battery capacity is sufficient to provide circuit power.

[0055] According to an embodiment of the present invention, the signal recognition module 400 is connected to the wireless transmission unit 312 and is suitable for performing signal cleaning, feature extraction, and speech recognition on the electromyographic signals processed and transmitted by the flexible circuit module. Specifically, the signal recognition module can extract key features reflecting speech signals from the electromyographic signals, such as Mel-frequency cepstral coefficients and spectrograms; and then train parameters of an acoustic model and / or a machine learning / deep learning model based on these extracted key features. The acoustic model can be a hidden Markov model, and the machine learning / deep learning model can be a neural network model. Furthermore, the training of the hidden Markov model can include the following processes: normalizing the Mel-frequency cepstral coefficient data, dividing the training set and the data set, initializing the model according to the number of recognition categories, using the same type of data to train the model corresponding to the category and obtain the parameters of each model; further, the training of the neural network model can include the following processes: normalizing the spectral data, dividing the training set and the data set, setting the convolution layer, normalization layer, pooling layer, activation function, optimizer, number of iterations, etc., and using the gradient descent method to obtain the optimal parameters; finally, the trained model is the module that realizes the recognition of electromyographic signals as speech functions, and the module can be placed in a terminal with hardware that matches the transmission signal of the above-mentioned wireless transmission unit.

[0056] According to the speech recognition system of the embodiment of the present invention, the flexible electrode module and the flexible circuit module of the system are both arranged on a flexible substrate, and are flexible as a whole and suitable for being attached to the throat of the human body. When the human mouth makes the mouth shape corresponding to the speech, although no sound is made, it will drive the throat muscles to move, and the surface electrodes can collect the electromyographic signals generated by the throat muscle movement. Moreover, the surface electrodes in the flexible electrode module of the present application are significantly thinner than traditional electrodes, and can better fit the epidermis, thereby realizing the collection of electromyographic signals of small areas, large curvatures, and large deformation positions of the epidermis; the above-mentioned electromyographic signals can be sent to the data acquisition circuit in the flexible circuit board through wires, and the wires in the flexible electrode module of the present application can greatly improve the surface The surface electrode is extensible; further, in the flexible circuit module, the data acquisition circuit receives the electromyographic signal transmitted by the wire, processes the received electromyographic signal, and transmits it through the wireless transmission unit to achieve wearable function and adapt to occasions such as sports where traditional electrodes cannot be used. At the same time, the power supply unit supplies power to the flexible circuit board, which is suitable for wearable applications; the flexible circuit board itself has flexibility, and the flexible packaging material is encapsulated on the outer surface of the flexible circuit board, which not only plays a protective role but also makes the overall structure of the flexible circuit module more flexible; the signal recognition module can perform signal cleaning, feature extraction and language recognition on the processed electromyographic signal transmitted by the wireless transmission unit, and finally realize language recognition. As a result, the system has a flexible device that is completely in contact with the skin, including a flexible electrode module and a flexible circuit module. It can be worn comfortably for a long time without falling off, and the overall transparency is high, concealed, and inconspicuous, which is suitable for sports scenes; at the same time, the system can realize language recognition function by only using the electromyographic signal of the throat and without making a sound.

[0057] In the description of this specification, the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0058] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A language recognition system, characterized in that: include: A flexible substrate, wherein the flexible substrate is provided with: A flexible electrode module, comprising a surface electrode and a wire, both of which are disposed on the flexible substrate, one end of the wire being connected to the surface electrode and adapted to collect and transmit myoelectric signals generated by laryngeal muscle movement; A flexible circuit module, comprising a flexible circuit board, a flexible packaging material, and a power supply unit. The flexible circuit board is disposed on the flexible substrate, the flexible packaging material is disposed on the flexible circuit board, the flexible circuit board comprises a data acquisition circuit and a wireless transmission unit, the data acquisition circuit is connected to the other end of the wire, the wireless transmission unit is connected to the data acquisition circuit and is suitable for receiving, processing, and transmitting the electromyographic signal, and the power supply unit supplies power to the flexible circuit board; a signal recognition module connected to the wireless transmission unit and adapted to perform signal cleaning, feature extraction, and language recognition on the electromyographic signal processed and transmitted by the flexible circuit module; The surface electrode and the wire both include a gasket layer and a conductive layer, and the gasket layer of the wire is connected to the gasket layer of the surface electrode, and the conductive layer of the wire is connected to the conductive layer of the surface electrode. The gasket layer is arranged on the flexible substrate, and the conductive layer is arranged on the gasket layer.

2. The language recognition system according to claim 1, wherein: The conductive wire further includes a protective layer, which is arranged on the conductive layer of the conductive wire.

3. The language recognition system according to claim 2, characterized in that The gasket layer of the wire and the gasket layer of the surface electrode are integrally formed, and the conductive layer of the wire and the conductive layer of the surface electrode are integrally formed; Optionally, the gasket layer, the conductive layer, and the protective layer of the wire have the same shape; Optionally, the spacer layer and the conductive layer of the surface electrode have the same shape.

4. The language recognition system according to claim 1, wherein: The conductive wire extends in a meandering manner on the flexible substrate; Optionally, the surface electrode has a filamentous meandering structure; Optionally, the thickness of the flexible substrate is 50-300 μm.

5. The language recognition system according to claim 2, wherein: The thickness of the spacer layer of the surface electrode and the spacer layer of the wire are independently 3-50 μm; Optionally, the thickness of the conductive layer of the surface electrode and the conductive layer of the wire are independently 85-320 nm; Optionally, the protective layer has a thickness of 3-50 μm; Optionally, the gasket layer and the protective layer are made of polyimide.

6. The language recognition system according to claim 1, wherein: The total thickness of the flexible substrate and the flexible electrode module is 50-500 μm.

7. The language recognition system according to claim 2, characterized in that The conductive layers in the surface electrode and the wire each include a first metal layer and a second metal layer, the first metal layer being provided on the pad layer of the surface electrode and the pad layer of the wire, the second metal layer being provided on the first metal layer, and the protective layer of the wire being provided on the second metal layer of the wire; Optionally, the thickness of the first metal layer in the surface electrode and the first metal layer in the wire are independently 5-20 nm; Optionally, the thickness of the second metal layer in the surface electrode and the second metal layer in the wire are independently 80-300 nm; Optionally, the first metal layer is a chromium metal layer, and the second metal layer is a gold metal layer.

8. The language recognition system according to claim 1, wherein: The materials of the flexible packaging material and the flexible substrate are independently selected from at least one of a dressing composed of a polyurethane film and an acrylic adhesive, a polyimide film, polydimethylsiloxane, and a hydrogel; Optionally, the thickness of the flexible circuit board is 0.1-0.5 mm; Optionally, the overall thickness of the flexible circuit board, the flexible packaging material, and the flexible substrate is 0.5-1.5 mm.

9. The speech recognition system according to claim 1, wherein: The data acquisition circuit includes an instrument amplifier circuit, a high-pass filter circuit, a low-pass filter circuit, and an ADC acquisition circuit connected in sequence, the instrument amplifier circuit is connected to the other end of the wire, and the data acquisition circuit also includes a drive circuit, and the drive circuit is connected to the instrument amplifier circuit; Optionally, the wireless transmission unit is selected from at least one of Bluetooth, near field communication, and wireless broadband; Optionally, the power supply unit is a lithium battery, and the thickness of the lithium battery is less than 0.5 mm.

10. The language recognition system according to claim 1, characterized in that The signal recognition module uses an acoustic model and / or a machine learning-deep learning model to realize the recognition function; Optionally, the acoustic model is a hidden Markov model, and the machine learning-deep learning model is a neural network model.

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