EMG myoelectric signal acquisition and processing circuit for biofeedback therapy

Abstract

The utility model discloses a kind of EMG myoelectricity signal acquisition processing circuit for biofeedback therapy, including EMG sensor, first data processing circuit and second data processing circuit;One end of EMG sensor is connected with first data processing circuit, and first data processing circuit is connected with second data processing circuit;The other end of EMG sensor is used to collect the myoelectricity signal of human body;And the collected myoelectricity signal is transmitted to first data processing circuit, and second data processing circuit exports signal to host computer.In the utility model, by first data processing circuit to the myoelectricity signal is amplified and handled, can effectively enhance target signal, compared with background noise, improve signal-to-noise ratio, so that subsequent processing and analysis are more accurate.Signal processing is divided into two stages, can make whole system more flexible, different processing algorithm and function are convenient in different stages Application.By efficient circuit design, real-time signal acquisition and processing can be realized.

Description

Technical Field

[0001] This invention belongs to the field of data acquisition technology, specifically an EMG electromyography signal acquisition and processing circuit for biofeedback therapy. Background Technology

[0002] Electromyography (EMG) is a one-dimensional time-series electrical signal that is guided and recorded from the surface of the muscle through surface electrodes to capture changes in the bioelectrical activity of the neuromuscular system. EMG signals reflect the functional state of nerves and muscles and can be applied in medical research, ergonomics, and the diagnosis of neuromuscular diseases.

[0003] In existing technologies, data acquisition devices use sensors to pick up bioelectrical signals from the skin surface, amplify them using an amplifier, convert the analog signals into electrical signals using an AD converter, and then send them to software for processing. The processed signals can then be fed back to the subject in multimedia formats such as sound, images, and animation. For example, the technical solution described in patent publication number CN222516867U.

[0004] In existing technologies, the electromyographic signals of the human body are very weak, and the signals obtained through electrodes are mixed with a lot of interference signals, such as electrode contact noise, power frequency interference, and external electromagnetic field interference. Utility Model Content

[0005] The purpose of this invention is to provide an EMG signal acquisition and processing circuit for biofeedback therapy, in order to solve the problem in the prior art that the EMG signal is weak and mixed with interference signals.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: An EMG electromyography signal acquisition and processing circuit for biofeedback therapy includes an EMG sensor, a first data processing circuit, and a second data processing circuit; wherein one end of the EMG sensor is connected to the first data processing circuit, and the first data processing circuit is connected to the second data processing circuit. The other end of the EMG sensor is used to collect electromyographic signals from the human body; and the collected electromyographic signals are transmitted to the first data processing circuit. The first data processing circuit amplifies and processes the electromyographic signals and then transmits them to the second data processing circuit, which outputs the signals to the host computer.

[0007] According to the above technical solution, the first data processing circuit includes amplifiers U10, U11, U12, and U13, resistors R2, R5, R10, R11, R14, R15, R18, R30, R45, and R46, capacitors C4, C6, C38, C13, and C14, and inductors L3 and L4. Specifically, pin 1 of the EMG sensor is connected to one end of resistor R2, and the other end of resistor R2 is connected to pins 13 and 14 of amplifier U10; pin 2 of the EMG sensor is connected to one end of inductor L3, and pin 3 of the EMG sensor is connected to one end of inductor L4. The other end of inductor L3 is connected to one end of capacitor C6, one end of capacitor C38, and pin 3 of amplifier U11; the other end of inductor L4 is connected to the other end of capacitor C4, one end of capacitor C38, and pin 5 of amplifier U13. Pin 2 of amplifier U11 is connected to one end of resistor R5 and one end of resistor R10; the other end of resistor R5 is connected to one end of resistor R11 and pin 6 of amplifier U13; the other end of resistor R10 is connected to pin 1 of amplifier U11, resistor R14 and one end of capacitor C13. The other end of resistor R11 is connected to pin 7 of amplifier U13, resistor R15, and one end of capacitor C14. The other end of resistor R14 is connected to the other end of resistor R15 and pin 10 of amplifier U12. Pin 9 of amplifier U12 is connected to pin 8 of amplifier U12, one end of resistor 18 and resistor R30, and pin 12 of amplifier U10. The other end of resistor R18 is connected to the other end of capacitor C13 and one end of resistor R45. The other end of resistor R30 is connected to one end of capacitor C14 and resistor R46. The other ends of resistors R45 and R46 are connected to the second data processing circuit.

[0008] According to the above technical solution, the other ends of capacitors C4 and C6 are both grounded.

[0009] According to the above technical solution, a power supply circuit is also provided between the EMG sensor and inductors L3 and L4; the power supply circuit is used for the power input of the first data processing circuit.

[0010] According to the above technical solution, the power supply circuit includes diodes D2, D6, D8, and D10; wherein, one end of diode D2 is connected to pin 2 of the EMG sensor, diode D8, and inductor L3 respectively; one end of diode D6 is connected to pin 3 of the EMG sensor, diode D8, and inductor L4 respectively; the other ends of diodes D2 and D6 are connected to the power supply; and the other ends of diodes D8 and D10 are connected to the power supply.

[0011] According to the above technical solution, the second data processing circuit includes chip U11, capacitors C51, C52, C56, C58, C62, C15, C16, resistors R39, R53, and RS2. One end of capacitor C51 is connected to resistor R45, one end of capacitor C52, and pin 2 of chip U11; the other end of capacitor C52 is connected to resistor R46, pin 3 of chip U11, and one end of capacitor C56. Pin 1 of chip U11 is connected to one end of resistor RS2, the other end of resistor RS2 is connected to one end of resistor R39, and the other end of resistor R39 is connected to pin 8 of chip U11; pin 4 of chip U11 is connected to one end of resistor C58 and resistor C15 respectively; pin 7 of chip U11 is connected to one end of capacitor C16 and capacitor C62 respectively; pin 6 of chip U11 is used for signal output; pin 5 of chip U11 is connected to one end of resistor R53, and the other end of resistor R53 is connected to pin 6 of chip U11.

[0012] According to the above technical solution, the other ends of capacitors C51 and C56 are respectively grounded.

[0013] According to the above technical solution, one end of capacitor C58 and capacitor C15 are both connected to the power supply, and the other end of capacitor C58 and capacitor C15 are both grounded.

[0014] According to the above technical solution, one end of capacitor C62 and one end of capacitor C16 are both connected to the power supply, and one end of capacitor C62 and the other end of capacitor C16 are both grounded.

[0015] According to the above technical solution, both resistor R53 and pin 5 of chip U11 are grounded.

[0016] Compared with the prior art, the present invention has the following beneficial effects: In this invention, the electromyographic signal is amplified by the first data processing circuit, which can effectively enhance the target signal and improve the signal-to-noise ratio compared with the background noise, making subsequent processing and analysis more accurate.

[0017] Dividing signal processing into two stages (first data processing circuit and second data processing circuit) makes the entire system more flexible, facilitating the application of different processing algorithms and functions at different stages, such as filtering and feature extraction. Through efficient circuit design, real-time signal acquisition and processing can be achieved, ensuring timely reflection of physiological changes in biofeedback therapy and improving treatment efficacy. Attached Figure Description

[0018] Figure 1 This is a circuit diagram for EMG electromyography signal acquisition and processing of this utility model. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Example:

[0021] like Figure 1 As shown, an EMG electromyography signal acquisition and processing circuit for biofeedback therapy includes an EMG sensor, a first data processing circuit, and a second data processing circuit; wherein, one end of the EMG sensor is connected to the first data processing circuit, and the first data processing circuit is connected to the second data processing circuit. The other end of the EMG sensor is used to collect electromyographic signals from the human body; and the collected electromyographic signals are transmitted to the first data processing circuit. The first data processing circuit amplifies and processes the electromyographic signals and then transmits them to the second data processing circuit, which outputs the signals to the host computer.

[0022] In this invention, the electromyographic signal is amplified by the first data processing circuit, which can effectively enhance the target signal and improve the signal-to-noise ratio compared with the background noise, making subsequent processing and analysis more accurate.

[0023] Dividing signal processing into two stages (first data processing circuit and second data processing circuit) makes the entire system more flexible, facilitating the application of different processing algorithms and functions at different stages, such as filtering and feature extraction. Through efficient circuit design, real-time signal acquisition and processing can be achieved, ensuring timely reflection of physiological changes in biofeedback therapy and improving treatment efficacy.

[0024] By outputting the processed signal to the host computer, users can easily monitor and provide feedback. Changes in electromyography signals can be displayed intuitively through a computer interface, enhancing the user experience.

[0025] The circuit design adopts a modular approach, allowing each part to be independently optimized and upgraded, facilitating subsequent technical improvements and expansions, such as adding more signal processing functions or adapting to different types of sensors. Example

[0026] This embodiment is a further refinement of Embodiment 1.

[0027] The first data processing circuit includes amplifiers U10, U11, U12, and U13; resistors R2, R5, R10, R11, R14, R15, R18, R30, R45, and R46; capacitors C4, C6, C38, C4, C6, C13, and C14; and inductors L3 and L4. Specifically, pin 1 of the EMG sensor is connected to one end of resistor R2, and the other end of resistor R2 is connected to pins 13 and 14 of amplifier U10; pin 2 of the EMG sensor is connected to one end of inductor L3, and pin 3 of the EMG sensor is connected to one end of inductor L4. The other end of inductor L3 is connected to one end of capacitor C6, one end of capacitor C38, and pin 3 of amplifier U11; the other end of inductor L4 is connected to the other end of capacitor C4, one end of capacitor C38, and pin 5 of amplifier U13. Pin 2 of amplifier U11 is connected to one end of resistor R5 and one end of resistor R10; the other end of resistor R5 is connected to one end of resistor R11 and pin 6 of amplifier U13; the other end of resistor R10 is connected to pin 1 of amplifier U11, resistor R14 and one end of capacitor C13. The other end of resistor R11 is connected to pin 7 of amplifier U13, resistor R15, and one end of capacitor C14. The other end of resistor R14 is connected to the other end of resistor R15 and pin 10 of amplifier U12. Pin 9 of amplifier U12 is connected to pin 8 of amplifier U12, one end of resistor 18 and resistor R30, and pin 12 of amplifier U10. The other end of resistor R18 is connected to the other end of capacitor C13 and one end of resistor R45. The other end of resistor R30 is connected to one end of capacitor C14 and resistor R46. The other ends of resistors R45 and R46 are connected to the second data processing circuit.

[0028] The other ends of capacitors C4 and C6 are both grounded.

[0029] A power supply circuit is also provided between the EMG sensor and inductors L3 and L4; the power supply circuit is used for the power input of the first data processing circuit.

[0030] The power supply circuit includes diodes D2, D6, D8, and D10; one end of diode D2 is connected to pin 2 of the EMG sensor, diode D8, and inductor L3; one end of diode D6 is connected to pin 3 of the EMG sensor, diode D8, and inductor L4; the other ends of diodes D2 and D6 are connected to the power supply; the other ends of diodes D8 and D10 are connected to the power supply.

[0031] The second data processing circuit includes chip U11, capacitors C51, C52, C56, C58, C62, C15, C16, resistors R39, R53, and RS2. One end of capacitor C51 is connected to resistor R45, one end of capacitor C52, and pin 2 of chip U11; the other end of capacitor C52 is connected to resistor R46, pin 3 of chip U11, and one end of capacitor C56. Pin 1 of chip U11 is connected to one end of resistor RS2, the other end of resistor RS2 is connected to one end of resistor R39, and the other end of resistor R39 is connected to pin 8 of chip U11; pin 4 of chip U11 is connected to one end of resistor C58 and resistor C15 respectively; pin 7 of chip U11 is connected to one end of capacitor C16 and capacitor C62 respectively; pin 6 of chip U11 is used for signal output; pin 5 of chip U11 is connected to one end of resistor R53, and the other end of resistor R53 is connected to pin 6 of chip U11.

[0032] The other ends of capacitors C51 and C56 are grounded. One end of each of capacitors C58 and C15 is connected to the power supply, and the other end of each is grounded. One end of each of capacitors C62 and C16 is connected to the power supply, and the other end of each is grounded. Resistor R53 and pin 5 of chip U11 are both grounded.

[0033] The working principle of this utility model is as follows: one end of the EMG sensor is used to collect electromyographic signals from the human body. The weak electrical signals generated by the human muscles are input into the circuit through the corresponding pins of the EMG sensor. Pin 1 of the EMG sensor transmits the signal to resistor R2, and pins 2 and 3 are connected to inductors L3 and L4 respectively to prepare for subsequent signal processing.

[0034] Signal amplification and processing (first data processing circuit): Resistor R2 transmits the signal acquired by the EMG sensor to pins 13 and 14 of amplifier U10. Simultaneously, inductors L3 and L4 provide filtering or signal adjustment. The other end of inductor L3 is connected to capacitors C6 and C38 and pin 3 of amplifier U11, while the other end of inductor L4 is connected to capacitors C4 and C38 and pin 5 of amplifier U13. Capacitors C4 and C6 act as filters, removing high-frequency noise and other contaminants from the signal, resulting in a cleaner signal input to the amplifier.

[0035] Differential Amplification: Amplifiers U11 and U13 form a differential amplifier circuit. Pin 2 of amplifier U11 is connected to resistors R5 and R10. The other end of resistor R5 is connected to resistor R11 and pin 6 of amplifier U13. Through this connection method, the input signal is differentially amplified, which can effectively suppress common-mode interference and improve the signal quality and stability.

[0036] Further amplification: Pin 1 of amplifier U11, resistor R14, and capacitor C13, and pin 7 of amplifier U13, resistor R15, and capacitor C14 form a feedback network to adjust the amplification factor and stabilize the output signal. The amplified signal is transmitted to pin 10 of amplifier U12 through resistors R14 and R15. The circuit consisting of pins 9 and 8 of amplifier U12, resistors R18 and R30 further processes and amplifies the signal. Finally, the processed signal is output to the second data processing circuit through resistors R45 and R46.

[0037] Power supply circuit operation: The power supply circuit provides a stable power input to the first data processing circuit. Diodes D2, D6, D8, and D10 form a power protection and voltage regulation circuit. One end of diode D2 is connected to pin 2 of the EMG sensor, diode D8, and inductor L3, respectively. One end of diode D6 is connected to pin 3 of the EMG sensor, diode D8, and inductor L4, respectively. The other ends of diodes D2 and D6 are connected to the power supply, as are the other ends of diodes D8 and D10, to prevent reverse connection of the power supply and to perform voltage regulation and filtering to ensure the stability of the circuit operation.

[0038] Signal Output Processing (Second Data Processing Circuit): The signal from the first data processing circuit is input to pins 2 and 3 of chip U11 through capacitors C51 and C52. Chip U11 further processes and converts the signal. The circuit composed of resistors RS2, R39, etc., is used to set the operating parameters and feedback adjustment of chip U11. Capacitors C58, C15, C62, C16, etc., serve as filters and power supply stabilizers, providing a stable operating environment for chip U11. Finally, the processed signal is output from pin 6 of chip U11 to the host computer for subsequent analysis, display, and biofeedback therapy operations. Resistor R53 serves as a grounding protection and signal conditioning unit, ensuring the stability and reliability of the circuit.

[0039] Furthermore, the electronic components used in this invention are all existing technologies. For example, the EMG sensor used is the Delsys Trigno AV9 electromyography sensor.

[0040] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0041] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An EMG electromyography signal acquisition and processing circuit for biofeedback therapy, characterized in that: It includes an EMG sensor, a first data processing circuit, and a second data processing circuit; wherein one end of the EMG sensor is connected to the first data processing circuit, and the first data processing circuit is connected to the second data processing circuit; The other end of the EMG sensor is used to collect electromyographic signals from the human body; and the collected electromyographic signals are transmitted to the first data processing circuit. The first data processing circuit amplifies and processes the electromyographic signals and then transmits them to the second data processing circuit, which outputs the signals to the host computer.

2. The EMG signal acquisition and processing circuit for biofeedback therapy according to claim 1, wherein: The first data processing circuit includes amplifiers U10, U11, U12, and U13; resistors R2, R5, R10, R11, R14, R15, R18, R30, R45, and R46; capacitors C4, C6, C38, C13, and C14; and inductors L3 and L4. Specifically, pin 1 of the EMG sensor is connected to one end of resistor R2, and the other end of resistor R2 is connected to pins 13 and 14 of amplifier U10; pin 2 of the EMG sensor is connected to one end of inductor L3, and pin 3 of the EMG sensor is connected to one end of inductor L4. The other end of inductor L3 is connected to one end of capacitor C6, one end of capacitor C38, and pin 3 of amplifier U11; the other end of inductor L4 is connected to the other end of capacitor C4, one end of capacitor C38, and pin 5 of amplifier U13. Pin 2 of amplifier U11 is connected to one end of resistor R5 and one end of resistor R10; the other end of resistor R5 is connected to one end of resistor R11 and pin 6 of amplifier U13; the other end of resistor R10 is connected to pin 1 of amplifier U11, resistor R14 and one end of capacitor C13. The other end of resistor R11 is connected to pin 7 of amplifier U13, resistor R15, and one end of capacitor C14. The other end of resistor R14 is connected to the other end of resistor R15 and pin 10 of amplifier U12. Pin 9 of amplifier U12 is connected to pin 8 of amplifier U12, one end of resistor R18 and resistor R30, and pin 12 of amplifier U10. The other end of resistor R18 is connected to the other end of capacitor C13 and one end of resistor R45. The other end of resistor R30 is connected to one end of capacitor C14 and resistor R46. The other ends of resistors R45 and R46 are connected to the second data processing circuit.

3. The EMG signal acquisition and processing circuit for biofeedback therapy according to claim 2, wherein: The other ends of capacitors C4 and C6 are both grounded.

4. The EMG signal acquisition and processing circuit for biofeedback therapy according to claim 3, wherein: A power supply circuit is also provided between the EMG sensor and inductors L3 and L4; the power supply circuit is used for the power input of the first data processing circuit.

5. The EMG signal acquisition and processing circuit for biofeedback therapy according to claim 4, wherein: The power supply circuit includes diodes D2, D6, D8, and D10; one end of diode D2 is connected to pin 2 of the EMG sensor, diode D8, and inductor L3; one end of diode D6 is connected to pin 3 of the EMG sensor, diode D8, and inductor L4; the other ends of diodes D2 and D6 are connected to the power supply; the other ends of diodes D8 and D10 are connected to the power supply.

6. The EMG signal acquisition and processing circuit for biofeedback therapy according to claim 5, wherein: The second data processing circuit includes chip U11, capacitors C51, C52, C56, C58, C62, C15, C16, resistors R39, R53, and RS2. One end of capacitor C51 is connected to resistor R45, one end of capacitor C52, and pin 2 of chip U11; the other end of capacitor C52 is connected to resistor R46, pin 3 of chip U11, and one end of capacitor C56. Pin 1 of chip U11 is connected to one end of resistor RS2, the other end of resistor RS2 is connected to one end of resistor R39, and the other end of resistor R39 is connected to pin 8 of chip U11; pin 4 of chip U11 is connected to one end of resistor C58 and resistor C15 respectively; pin 7 of chip U11 is connected to one end of capacitor C16 and capacitor C62 respectively; pin 6 of chip U11 is used for signal output; pin 5 of chip U11 is connected to one end of resistor R53, and the other end of resistor R53 is connected to pin 6 of chip U11.

7. The EMG signal acquisition and processing circuit for biofeedback therapy according to claim 6, wherein: The other ends of capacitors C51 and C56 are grounded respectively.

8. The EMG signal acquisition and processing circuit for biofeedback therapy according to claim 7, wherein: One end of capacitors C58 and C15 is connected to the power supply, and the other end of capacitors C58 and C15 is grounded.

9. The EMG signal acquisition and processing circuit for biofeedback therapy according to claim 8, wherein: One end of capacitor C62 and one end of capacitor C16 are both connected to the power supply, and one end of capacitor C62 and the other end of capacitor C16 are both grounded.

10. The EMG electromyography signal acquisition and processing circuit for biofeedback therapy according to claim 9, characterized in that: Resistor R53 and pin 5 of chip U11 are both grounded.

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