Myoelectric wristband device
By designing an electromyography (EMG) wristband device, which employs a shared electrode and flexible circuit board structure, the high cost of existing EMG devices has been solved, enabling the acquisition of EMG signals and reducing costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-25
- Publication Date
- 2026-03-27
AI Technical Summary
Existing electromyography (EMG) wristbands and armbands are expensive due to the use of multiple sets of EMG electrodes.
Design an electromyography wristband device that uses a shared electrode and flexible circuit board structure, including a main unit, wristband body, main control circuit and power module. By using the shared electrode to work in conjunction with each electrode group, the number of electrodes is reduced to reduce costs.
It achieves the acquisition of electromyographic signals, has a simple structure, and reduces costs.
Smart Images
Figure CN224039226U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the technical field of electronic equipment relates to a myoelectric signal acquisition device especially, relates to a myoelectric wrist belt device. BACKGROUND
[0002] Myoelectric arm ring is a kind of equipment using muscle electrical signal (E lectromyography,EMG) to carry out human-computer interaction.It can let user control target equipment by gesture (substitute for and hand and wrist related hand shape or action).Usually by the sensor attached on arm gathers muscle electrical signal, after algorithm analysis muscle electrical signal, the gesture of current user is identified, finally the control instruction associated with the gesture is sent to target equipment, realizes the purpose of controlling target equipment.
[0003] Existing myoelectric bracelet, myoelectric arm ring usually adopts one group or several groups of myoelectric electrode, and each group of myoelectric electrode includes three myoelectric electrodes, and the cost is higher.
[0004] Therefore, it is urgent to design a new myoelectric signal acquisition device to overcome at least part of the above-mentioned defects of the existing myoelectric signal acquisition device. UTILITY MODEL CONTENT
[0005] The utility model provides a kind of myoelectric wrist belt device, can obtain muscle electrical signal, simple structure, reduce cost by the setting of common electrode.
[0006] To solve the above technical problems, according to one aspect of the utility model, the following technical scheme is adopted:
[0007] A kind of myoelectric wrist belt device, the myoelectric wrist belt device includes host computer and wrist belt body, the wrist belt body is connected to the host computer;
[0008] The host computer is provided with main control circuit and power module, and the power module is connected to the main control circuit to provide power supply for the main control circuit;
[0009] The wrist belt body is of flexible structure, and is internally provided with flexible circuit board;One side of the wrist belt body is provided with a plurality of electrode groups, each electrode group includes two electrodes, which are respectively movable electrode and reference electrode;Each electrode group is arranged on the flexible circuit board;
[0010] The myoelectric wrist belt device further includes a common electrode, which cooperates with each electrode group and serves as the third electrode of each electrode group.
[0011] The wrist belt body is provided with a first interface connected to the main control circuit, and the host computer is provided with a second interface connected to the wrist belt body;The first interface can be connected to the second interface.
[0012] As an embodiment of the utility model, the main control circuit includes signal amplification circuit, filter circuit, analog-digital conversion circuit and MCU, the flexible circuit board connects signal amplification circuit through interface, and electrode signal of each electrode group is output to the input end of signal amplification circuit.
[0013] The signal amplification circuit amplifies electrode signal, and the output end of the signal amplification circuit is connected with the input end of filter circuit.
[0014] The filter circuit filters the signal amplified by the signal amplification circuit, and the output end of the filter circuit is connected with the input end of the analog-digital conversion circuit.
[0015] The analog-digital conversion circuit converts the received signal into analog-digital signal, and the output end of the analog-digital conversion circuit is connected with the input end of MCU.
[0016] As an embodiment of the utility model, the filter circuit includes group row RP1, container row CP1, third five resistance R35, third eight resistance R38, fourth nine resistance R49 and fifth zero resistance R50.
[0017] The first pin of the group row RP1 is connected with the fourth pin of the container row CP1, the second pin of the group row RP1 is connected with the third pin of the container row CP1, the third pin of the group row RP1 is connected with the second pin of the container row CP1, and the fourth pin of the group row RP1 is connected with the first pin of the container row CP1, and the fifth pin of the container row CP1, the sixth pin of the container row CP1, the seventh pin of the container row CP1 and the eighth pin of the container row CP1 are grounded.
[0018] The fifth pin of the group row RP1 is connected with the second end of the third eight resistance R38, and the first end of the third eight resistance R38 is grounded, the sixth pin of the group row RP1 is connected with the second end of the third five resistance R35, and the first end of the third five resistance R35 is grounded, the seventh pin of the group row RP1 is connected with the second end of the fourth nine resistance R49, the first end of the fourth nine resistance R49 is grounded, the eighth pin of the group row RP1 is connected with the second end of the fifth zero resistance R50, and the first end of the fifth zero resistance R50 is grounded.
[0019] As an embodiment of the utility model, the host computer is provided with at least one second electrode group, the second electrode group includes second movable electrode and second reference electrode, and each second movable electrode and second reference electrode work with the common electrode.
[0020] As an embodiment of the utility model, the common electrode is arranged on the host computer.
[0021] As an embodiment of the utility model, the movable electrode and the reference electrode in each electrode group are in long strip structure, and the movable electrode and the reference electrode are arranged in parallel.
[0022] As an embodiment of the utility model, the common electrode is in long strip structure, and the common electrode is arranged perpendicularly to the movable electrode and the reference electrode in the unfolded state of the wrist strap body.
[0023] As an embodiment of the utility model, the host computer is provided with a shell, and the host control circuit and the power module are arranged in the shell.
[0024] The myoelectric wrist strap device provided by the utility model can obtain myoelectric signals, has simple structure, and reduces cost through the arrangement of the common electrode. BRIEF DESCRIPTION OF DRAWINGS
[0025] Figure 1 It is a structure schematic view of the myoelectric wrist strap device in an embodiment of the utility model.
[0026] Figure 2 It is a structure schematic view of the myoelectric wrist strap device in an embodiment of the utility model.
[0027] Figure 3 It is a structure schematic view of the myoelectric wrist strap device in an embodiment of the utility model.
[0028] Figure 4 It is a composition schematic view of the control part of the myoelectric wrist strap device in an embodiment of the utility model.
[0029] Figure 5 It is a composition schematic view of the host control circuit of the myoelectric wrist strap device in an embodiment of the utility model.
[0030] Figure 6 It is a circuit schematic view of the filter circuit of the myoelectric wrist strap device in an embodiment of the utility model.
[0031] Figure 7 It is a circuit schematic view of the signal amplification circuit of the myoelectric wrist strap device in an embodiment of the utility model.
[0032] Figure 8 It is a use scene schematic view of the myoelectric wrist strap device in an embodiment of the utility model. DETAILED DESCRIPTION
[0033] The preferred embodiments of the utility model are described in detail below with reference to the drawings.
[0034] For further understanding of the present application, the preferred embodiments of the present application will be described in the following with examples, but it should be understood that these descriptions are only for further illustrating the features and advantages of the present application, and are not limitations to the claims of the present application.
[0035] The description of this part is only for several typical embodiments, and the present application is not limited to the range described in the embodiments. The mutual replacement of the same or similar prior art means and some technical features in the embodiments is also within the description and protection range of the present application.
[0036] The "connection" in the description includes direct connection and indirect connection, such as connection through some active devices, passive devices or electrically conductive media; and can also include the connection of other active devices or passive devices known to those skilled in the art on the basis of achieving the same or similar functional purposes, such as the connection of circuits or components such as switches, follower circuits, etc.
[0037] The present application discloses a myoelectric wristband device, Figures 1 to 3 The present application discloses a myoelectric wristband device, Figure 4 The present application discloses a myoelectric wristband device, Figures 1 to 4 The myoelectric wristband device comprises a host computer 1 and a wristband body 2, and the wristband body 2 is connected to the host computer 1.
[0038] The host computer 1 is provided with a main control circuit 11 and a power module 12, and the power module 12 is connected to the main control circuit 11 to provide power supply for the main control circuit 11. In an embodiment, the host computer 1 is provided with a shell, and the main control circuit 11 and the power module 12 are arranged in the shell; the shell can include an upper shell 16 and a lower shell 17.
[0039] The wristband body 2 is of a flexible structure, and a flexible circuit board is arranged in the flexible structure; one side of the wristband body 2 is provided with a plurality of electrode groups, each electrode group comprising two electrodes 21, namely a movable electrode 22 and a reference electrode 23; each electrode group is arranged on the flexible circuit board, and the flexible circuit board is used to connect each electrode group. The myoelectric wristband device further comprises a common electrode 3, which cooperates with each electrode group and serves as a third electrode of each electrode group.
[0040] In an embodiment of the present application, the host computer 1 can be provided with at least one second electrode group, and the second electrode group comprises a second movable electrode 14 and a second reference electrode 15; each second movable electrode 14 and second reference electrode 15 cooperates with the common electrode 3. The common electrode 3 can be arranged on the host computer 1; of course, the common electrode 3 can also be arranged on the wristband body 2.
[0041] The active electrode 22 and the reference electrode 23 in each electrode group are in a long strip shape, and are arranged in parallel. In the state that the myoelectric wristband device is arranged on the human body, the extension direction of the long strip shape of the active electrode 22 and the reference electrode 23 corresponds to the circumferential direction of the human body arrangement position, so that the accuracy of the myoelectric signal collected by the device is improved. The common electrode 3 is in a long strip shape, and is arranged perpendicularly to the active electrode 22 and the reference electrode 23 in the state that the wristband body 2 is unfolded.
[0042] The wristband body 2 is provided with a first interface 25 connected with the main control circuit 11, and the host computer 1 is provided with a second interface 13 connected with the wristband body; the first interface 25 can be connected with the second interface 13 in cooperation.
[0043] Figure 4 、 Figure 5 It is a component schematic view of the control part of the myoelectric wristband device in an embodiment of the utility model; please refer to Figure 4 、 Figure 5 In an embodiment of the utility model, the main control circuit 11 includes signal amplification circuit 111, filter circuit 112, analog-digital conversion circuit 113 and MCU 114; the flexible circuit board is connected with signal amplification circuit 111 through the interface, and the electrode signals of each electrode group are output to the input end of signal amplification circuit 111.
[0044] The signal amplification circuit 111 amplifies the electrode signals, and the output end of the signal amplification circuit 111 is connected with the input end of filter circuit 112; the filter circuit 112 carries out filter processing to the signals amplified by the signal amplification circuit 111, and the output end of the filter circuit 112 is connected with the input end of analog-digital conversion circuit 113; the analog-digital conversion circuit 113 carries out analog-digital conversion to the received signals, and the output end of the analog-digital conversion circuit 113 is connected with the input end of MCU 114.
[0045] Figure 6 It is a circuit schematic view of the filter circuit of the myoelectric wristband device in an embodiment of the utility model; please refer to Figure 6 In an embodiment of the utility model, the filter circuit includes group row RP1, capacitor row CP1, third five resistance R35, third eight resistance R38, fourth nine resistance R49 and fifth zero resistance R50.
[0046] The first pin of the group row RP1 is connected with the fourth pin of the container row CP1, the second pin of the group row RP1 is connected with the third pin of the container row CP1, the third pin of the group row RP1 is connected with the second pin of the container row CP1, and the fourth pin of the group row RP1 is connected with the first pin of the container row CP1; the fifth pin of the container row CP1, the sixth pin of the container row CP1, the seventh pin of the container row CP1 and the eighth pin of the container row CP1 are grounded respectively.
[0047] The fifth pin of the group row RP1 is connected with the second end of the third eighth resistor R38, and the first end of the third eighth resistor R38 is grounded; the sixth pin of the group row RP1 is connected with the second end of the third fifth resistor R35, and the first end of the third fifth resistor R35 is grounded; the seventh pin of the group row RP1 is connected with the second end of the fourth ninth resistor R49, and the first end of the fourth ninth resistor R49 is grounded; and the eighth pin of the group row RP1 is connected with the second end of the fifth zero resistor R50, and the first end of the fifth zero resistor R50 is grounded.
[0048] Figure 7 It is a circuit schematic view of the signal amplification circuit of the myoelectric wristband device in an embodiment of the utility model; please refer to Figure 7 In an embodiment of the utility model, the signal amplification circuit comprises a PGA; the PGA is a differential input and differential output amplifier, and in an embodiment, it has 7 gain settings, which are 1, 2, 3, 4, 6, 8, 12 and 24 respectively.
[0049] Figure 8 It is a use scene schematic view of the myoelectric wristband device in an embodiment of the utility model; please refer to Figure 8In a use scenario of the myoelectric wristband device, the myoelectric wristband device comprises a myoelectric signal acquisition part and a myoelectric signal processing part. The myoelectric signal acquisition part comprises eight myoelectric acquisition electrodes uniformly distributed around the wrist and a reference electrode closely attached to the skin on the back of the host computer; each acquisition electrode comprises a positive electrode P electrode head and a negative electrode N electrode head, and the electrode heads are connected to the host computer through FPC flat cable; after the user correctly wears the wristband, the electrode heads closely attached to the skin transmit the collected myoelectric signals to the myoelectric signal processing part in the host computer. The myoelectric signal processing part comprises a hardware filter circuit, an analog-to-digital conversion chip and a digital signal transmission circuit; the filter circuit filters out noise signals and useless high-frequency and low-frequency signals; the analog-to-digital conversion chip completes the conversion of analog electrical signals to digital signals; and the digital signal transmission circuit transmits the converted digital signals to the microcontroller MCU. The MCU processes the received digital signals, filters out power frequency interference signals, filters out direct current component interference signals, filters out signals not in the effective frequency range, and obtains effective signals for gesture recognition and gesture training. The MCU sends control instructions according to the defined Bluetooth communication protocol; a Bluetooth chip is responsible for instruction transmission, and modulates, transmits and receives Bluetooth signals.
[0050] In summary, the myoelectric wristband device provided by the utility model can acquire myoelectric signals, has simple structure, and reduces cost through the arrangement of the common electrode.
[0051] The technical features of the above-described embodiments can be combined in any manner. To make the description concise, all possible combinations of the technical features in the above-described embodiments are not described, but as long as the combinations of the technical features do not conflict, they should be considered within the scope of the present disclosure.
[0052] The description and application of the utility model are illustrative, and are not intended to limit the scope of the utility model to the above-described embodiments. The effects or advantages involved in the embodiments can be affected by various factors and can not be embodied in the embodiments. The description of the effects or advantages is not intended to limit the embodiments. Variations and changes of the disclosed embodiments are possible, and the alternatives and equivalents of the components of the embodiments are known to those skilled in the art. It should be clear to those skilled in the art that the utility model can be realized in other forms, structures, arrangements, proportions, and with other components, materials and parts without departing from the spirit or essential characteristics of the utility model. Other variations and changes of the disclosed embodiments can be made without departing from the scope and spirit of the utility model.
Claims
1. An electromyographic wristband device, characterized by, The myoelectric wristband device comprises a host and a wristband body, and the wristband body is connected to the host; The host is provided with a main control circuit and a power module, the power module is connected to the main control circuit, and the main control circuit is provided with a power supply; The wristband body is of a flexible structure and is internally provided with a flexible circuit board; one side of the wristband body is provided with a plurality of electrode groups, each electrode group comprises two electrodes, namely a movable electrode and a reference electrode; and each electrode group is arranged on the flexible circuit board; The myoelectric wristband device further comprises a common electrode, and the common electrode works in cooperation with each electrode group and serves as a third electrode of each electrode group; The wristband body is provided with a first interface connected to the main control circuit, the host is provided with a second interface connected to the wristband body, and the first interface can be connected to the second interface.
2. The myoelectric wristband device according to claim 1, characterized in that: The main control circuit comprises a signal amplification circuit, a filter circuit, an analog-to-digital conversion circuit and an MCU; the flexible circuit board is connected to the signal amplification circuit through an interface, and electrode signals of each electrode group are output to an input end of the signal amplification circuit; The signal amplification circuit amplifies the electrode signals, and an output end of the signal amplification circuit is connected to an input end of the filter circuit; The filter circuit performs filtering processing on the signals amplified by the signal amplification circuit, and an output end of the filter circuit is connected to an input end of the analog-to-digital conversion circuit; The analog-to-digital conversion circuit performs analog-to-digital conversion on the received signals, and an output end of the analog-to-digital conversion circuit is connected to an input end of the MCU.
3. The myoelectric wristband device according to claim 2, characterized in that: The filter circuit comprises a group row RP1, a capacitor row CP1, a third five resistor R35, a third eight resistor R38, a fourth nine resistor R49 and a fifth zero resistor R50; A first pin of the group row RP1 is connected to a fourth pin of the capacitor row CP1, a second pin of the group row RP1 is connected to a third pin of the capacitor row CP1, a third pin of the group row RP1 is connected to a second pin of the capacitor row CP1, a fourth pin of the group row RP1 is connected to a first pin of the capacitor row CP1, and a fifth pin, a sixth pin, a seventh pin and an eighth pin of the capacitor row CP1 are grounded; A fifth pin of the group row RP1 is connected to a second end of the third eight resistor R38, a first end of the third eight resistor R38 is grounded; a sixth pin of the group row RP1 is connected to a second end of the third five resistor R35, a first end of the third five resistor R35 is grounded; a seventh pin of the group row RP1 is connected to a second end of the fourth nine resistor R49, a first end of the fourth nine resistor R49 is grounded, and an eighth pin of the group row RP1 is connected to a second end of the fifth zero resistor R50, a first end of the fifth zero resistor R50 is grounded.
4. The myoelectric wristband device according to claim 1, characterized in that: The host is provided with at least one second electrode group, and the second electrode group comprises a second movable electrode and a second reference electrode; each second movable electrode and second reference electrode works in cooperation with the common electrode.
5. The myoelectric wristband device according to claim 4, characterized in that: The common electrode is arranged on the main machine. 6.The myoelectric wristband device according to claim 1, characterized in that: The active electrode and the reference electrode in each electrode group are in a long strip structure, and the active electrode and the reference electrode are arranged in parallel. 7.The myoelectric wristband device according to claim 6, characterized in that: The common electrode is in a long strip structure; in a state that the wristband body is unfolded into a square, the common electrode is arranged perpendicularly to the active electrode and the reference electrode. 8.The myoelectric wristband device according to claim 6, characterized in that: In a state that the myoelectric wristband device is worn on a human body at a set position, the extension direction of the long strip active electrode and the reference electrode corresponds to the circumferential direction of the human body wearing position. 9.The myoelectric wristband device according to claim 1, characterized in that: The main machine is provided with a shell, and the main control circuit and the power module are arranged in the shell.