CN218852715U - Eight-lead myoelectricity acquisition system - Google Patents
Eight-lead myoelectricity acquisition system Download PDFInfo
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- CN218852715U CN218852715U CN202221413807.4U CN202221413807U CN218852715U CN 218852715 U CN218852715 U CN 218852715U CN 202221413807 U CN202221413807 U CN 202221413807U CN 218852715 U CN218852715 U CN 218852715U
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Abstract
The utility model discloses an eight muscle electricity collection systems that lead, include: a collection unit; the pretreatment unit is electrically connected with the acquisition unit; a control unit wirelessly connected with the preprocessing unit; and a receiving unit wirelessly connected with the control unit; the acquisition unit comprises eight-lead myoelectricity acquisition sensors, each myoelectricity acquisition sensor comprises at least 8 flexible electrodes, and each flexible electrode is arranged in parallel. According to the utility model discloses, its eight myoelectricity collection sensor that lead adopt flexible electrode, the skin of subject can be laminated to the skin of flexible electrode's skin during the use, and contact impedance between electrode and the skin is less, can gather high SNR's myoelectricity signal to flexible electrode has high conductivity again and has high pliability, has safe and reliable, stable performance simultaneously, has huge potential using value in rehabilitation medicine engineering, motion monitoring.
Description
Technical Field
The utility model relates to a flesh electricity collection field. More specifically, the utility model relates to an eight lead myoelectricity collection systems.
Background
In the field of electromyography acquisition, it is well known to adopt electromyography acquisition devices of different structural forms to realize efficient acquisition of electromyography signals. In the process of researching and realizing the efficient acquisition of the electromyographic signals, the inventor finds that the electromyographic acquisition device in the prior art at least has the following problems:
surface electromyography (sEMG) signals are bioelectric signals generated by muscle activity on the surface of the skin, and contain a variety of information about nerve and muscle activity. The sEMG signal detection has the characteristic of non-invasiveness, and is widely applied to the aspects of clinical medicine, rehabilitation engineering, biological machinery and the like.
Firstly, a myoelectricity acquisition sensor in the existing device has poor acquisition effect and unstable performance; secondly, in the existing device, no matter a pre-amplification circuit or a filtering trap circuit, an ADC front-end conditioning circuit is composed of a discrete operational amplifier, a resistor and a capacitor, and there are problems of many components, complex circuit, difficult debugging and the like.
In view of the above, there is a need to develop an eight-lead electromyography acquisition system to solve the above problems.
SUMMERY OF THE UTILITY MODEL
To the weak point that exists among the prior art, the utility model mainly aims at providing an eight muscle electricity collection system that leads, its eight muscle electricity collection sensor that leads adopt flexible electrode, the skin of the subject can be laminated to the skin of flexible electrode during the use, contact impedance between electrode and the skin is less, can gather high SNR's myoelectric signal to flexible electrode existing high conductivity has high pliability again, has safe and reliable, the stable performance simultaneously, in rehabilitation medical engineering, have huge potential using value in the motion monitoring.
Another object of the present invention is to provide an eight-lead myoelectric collecting system, which is small in size, light in weight and easy for the patient to carry; from the perspective of doctors, the system can have stronger interaction with the electromyographic data of patients, and the electromyographic data can be checked by connecting a public network; for the patient, the myoelectric signal can be visualized on the interface of the public network, the patient can be helped to know the physical condition of the patient, and meanwhile, the components are wirelessly transmitted, so that the patient can conveniently move.
To achieve these objects and other advantages in accordance with the purpose of the invention, there is provided an eight-lead myoelectric acquisition system, including: a collection unit;
the pretreatment unit is electrically connected with the acquisition unit;
a control unit wirelessly connected with the preprocessing unit; and
a receiving unit wirelessly connected with the control unit;
the acquisition unit comprises eight-lead myoelectricity acquisition sensors, each myoelectricity acquisition sensor comprises at least 8 flexible electrodes, and each flexible electrode is arranged in parallel.
Preferably, the pretreatment unit comprises: the preprocessing circuit is electrically connected with the myoelectricity acquisition sensor; and
the analog-to-digital converter is electrically connected with the preprocessing circuit;
the pre-processing circuit is used for receiving the electromyographic signals collected by the electromyographic sensor and conducting low-pass filtering pre-processing on the electromyographic signals, and the analog-to-digital converter conducts filtering, amplification and analog-to-digital conversion processing on the preprocessed electromyographic signals.
Preferably, the analog-to-digital converter adopts an ADS1299 chip.
Preferably, the control unit includes: the control processor is wirelessly connected with the analog-to-digital converter; and
a communication module wirelessly connected with the control processor and the receiving unit;
the control processor is used for receiving the electromyographic signals processed by the analog-to-digital converter, processing the received electromyographic signals, transmitting the processed data to the communication module, and transmitting the data to the receiving unit by the communication module.
Preferably, the control processor adopts an STM32F103 chip, and the communication module adopts an ALK8266WIFI communication interface module.
Preferably, the receiving unit is an upper computer, and the upper computer is in wireless connection with the communication module;
and the upper computer is used for receiving the data sent by the communication module and analyzing, processing and displaying the data.
Preferably, a first serial peripheral interface is arranged on the analog-to-digital converter, a second serial peripheral interface is arranged on the control processor, and the analog-to-digital converter is wirelessly connected with the control processor through the first serial peripheral interface and the second serial peripheral interface.
Preferably, the control processor is further provided with a third serial peripheral interface, the communication module is provided with a fourth serial peripheral interface, and the control processor is wirelessly connected with the communication module through the third serial peripheral interface and the fourth serial peripheral interface.
Preferably, the method further comprises the following steps: and the power supply is electrically connected with the analog-to-digital converter and the control processor.
One of the above technical solutions has the following advantages or beneficial effects: the utility model provides an eight muscle electricity collection systems that lead, its eight muscle electricity collection sensor that leads adopt flexible electrode, the skin of subject can be laminated to flexible electrode's skin during the use, and contact impedance between electrode and the skin is less, can gather high SNR's flesh electrical signal to flexible electrode existing high electric conductivity has high pliability again, has safe and reliable, stable performance simultaneously, has huge potential using value in rehabilitation medical engineering, motion monitoring.
Another technical scheme in the above technical scheme has the following advantages or beneficial effects: the utility model provides an eight-lead myoelectricity acquisition system which has small volume and light weight and is easy to be carried by patients; from the perspective of a doctor, the patient electromyographic data can be subjected to stronger interaction and mutual inductance, and the electromyographic data can be checked by connecting a public network; for the patient, the myoelectric signal can be visualized on the interface of the public network, the patient can be helped to know the physical condition of the patient, and meanwhile, the components are wirelessly transmitted, so that the patient can conveniently move.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
In order to illustrate the technical solutions of the embodiments of the present invention more clearly, the drawings of the embodiments will be briefly described below, and it is obvious that the drawings in the following description only relate to some embodiments of the present invention, and are not intended to limit the present invention, wherein:
fig. 1 is a top view of an eight-lead myoelectric acquisition system according to an embodiment of the present invention;
fig. 2 is a schematic diagram of an eight-lead myoelectric acquisition sensor in an eight-lead myoelectric acquisition system according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the drawings, the shape and size may be exaggerated for clarity, and the same reference numerals will be used throughout the drawings to designate the same or similar components.
Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of "first," "second," and similar terms in the description and in the claims does not indicate any order, quantity, or importance, but rather is used to distinguish one element from another. Also, the use of the terms "a," "an," or "the" and similar referents do not denote a limitation of quantity, but rather denote the presence of at least one. The word "comprise" or "comprises", and the like, means that the element or item listed before "comprises" or "comprising" covers the element or item listed after "comprising" or "comprises" and its equivalents, and does not exclude other elements or items. "upper", "lower", "left", "right", and the like are used only to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.
In the following description, terms such as center, thickness, height, length, front, back, rear, left, right, top, bottom, upper, lower, etc., are defined with respect to the configurations shown in the respective drawings, and in particular, "height" corresponds to a dimension from top to bottom, "width" corresponds to a dimension from left to right, "depth" corresponds to a dimension from front to rear, which are relative concepts, and thus may be varied accordingly depending on the position in which it is used, and thus these or other orientations should not be construed as limiting terms.
Terms concerning attachments, coupling and the like (e.g., "connected" and "attached") refer to a relationship wherein structures are secured or attached, either directly or indirectly, to one another through intervening structures, as well as both movable or rigid attachments, unless expressly described otherwise.
According to an embodiment of the present invention, with reference to the illustrations of fig. 1 and 2, it can be seen that the eight-lead myoelectric acquisition system 100 includes: an acquisition unit 110;
a preprocessing unit 120 electrically connected with the acquisition unit 110;
a control unit 130 wirelessly connected with the preprocessing unit 110; and
a receiving unit 140 wirelessly connected to the control unit 130;
the acquisition unit 110 includes an eight-lead myoelectricity acquisition sensor 111, the myoelectricity acquisition sensor 111 includes at least 8 flexible electrodes 1111, and each of the flexible electrodes 1111 are arranged in parallel.
Understandably, the utility model provides an eight muscle electricity collection sensor 111 that leads adopt flexible electrode, the skin of subject can be laminated to the skin of flexible electrode during the use, and contact impedance between electrode and the skin is less, can gather high SNR's myoelectric signal to flexible electrode is existing high electric conductivity and has high pliability again, has safe and reliable, stable performance simultaneously.
In a preferred embodiment of the present invention, the sampling rate of the eight-lead myoelectricity collecting sensor 111 is 500HZ.
Further, the preprocessing unit 120 includes: the preprocessing circuit 121 is electrically connected with the eight-lead myoelectric acquisition sensor 111; and
an analog-to-digital converter 122 electrically connected to the preprocessing circuit 121;
specifically, the preprocessing circuit 121 is configured to receive the electromyographic signals collected by the eight-lead electromyographic signal collecting sensor 111 and perform low-pass filtering preprocessing on the electromyographic signals, and the analog-to-digital converter 122 performs filtering, amplification and analog-to-digital conversion on the preprocessed electromyographic signals.
In a preferred embodiment of the present invention, the eight-lead myoelectric acquisition sensor 111 further comprises: a connecting portion 1112, wherein the connecting portion 1112 is electrically connected to each of the flexible electrodes 1111, and the connecting portion 1112 is electrically connected to the preprocessing circuit 121.
In a specific embodiment of the present invention, the adc 122 employs an ADS1299 chip.
It can be understood that the preprocessing unit 120 in the eight-lead myoelectricity acquisition system 100 is a key part for ensuring the overall performance of the system, and an ADS1299 chip of TI company is used as a core device.
The preprocessing unit 120 is designed as a whole, and aiming at the characteristic that the electromyographic signals are weak (0-1.5 mv), the signal-to-noise ratio of the signals is usually improved by an analog anti-mixing filter, a multistage amplifying circuit, a trap circuit and the like at the acquisition front end in the conventional device, which is also a main reason that the size is large and the portable design is not easy to realize. Because TI company's ADS1299 chip analog/digital conversion precision reaches 24 bits when sampling frequency is no longer than 8kHz, and the recombination has its integrated difference input Programmable Gain Amplifier (PGA) that has high common mode rejection ratio, consequently the utility model discloses analog anti-mixing filter circuit has only been kept to the analog side of pretreating unit 120 design, and base line drift, trapped wave etc. handle according to the application needs and realize in the digital side, adopt second order passive RC filter circuit to realize anti-mixing filter based on oversampling technique moreover, simplify the design of front end circuit greatly.
The input end of the ADSI299 chip adopts differential mode input, and each input end is integrated with an EMI filter, so that external radio frequency interference can be effectively inhibited; each input having a flexible routing switch (MUX) that can connect any input to the input of an amplifier (PGA); each input end is integrated with a continuous power-off detection (LeadOf) circuit, which can monitor whether the electrode is disconnected at any time; the ADSI299 chip integrates 8-path parallel Programmable Gain Amplifiers (PGA) and synchronous sampling analog-to-digital converters (ADC), and can provide high acquisition and conversion precision; the ADSI299 chip is internally integrated with a bias drive amplifier, so that common-mode interference noise can be effectively suppressed; the ADSI299 chip sets the internal control register and outputs digital signals by adopting an SPI serial communication mode, and when the ADSI299 chip finishes one-time acquisition, the ADSI299 chip pulls down the pin to inform the control unit 130 to read data through the serial peripheral interface.
The ADS1299 chip is differential input, the Common Mode Rejection Ratio (CMRR) of the ADS1299 chip is up to 110dB, the direct current input impedance of the ADS1299 chip is up to 1000Mn, and the design of a closed-loop bias driving circuit is matched, so that the anti-interference requirement of the system can be well ensured; the ADS1299 chip internally comprises 8 low-noise Programmable Gain Amplifiers (PGA) and 8 synchronous sampling analog-to-digital converters (ADC), the A/D conversion precision is up to 24bit, and the precision is higher.
Further, the control unit 130 includes: a control processor 131 wirelessly connected with the analog-to-digital converter 122; and
a communication module 132 wirelessly connected to the control processor 131 and the receiving unit 140;
specifically, the control processor 131 is configured to receive the electromyographic signal processed by the analog-to-digital converter 122, perform data processing on the received electromyographic signal, transmit the processed data to the communication module 132, and transmit the data to the receiving unit 140 through the communication module 132.
Further, the control processor 131 adopts an STM32F103 chip, and the communication module 132 adopts an ALK8266WIFI communication interface module.
Further, the receiving unit 140 is an upper computer, and the upper computer is wirelessly connected with the communication module 132;
the upper computer is used for receiving the data sent by the communication module 132, and analyzing, processing and displaying the data.
In a preferred embodiment of the present invention, the communication module 132 adopts WIFI: and the UDP/TCP wireless communication mode is wirelessly connected with the upper computer.
Further, a first serial peripheral interface 1221 is disposed on the analog-to-digital converter 122, a second serial peripheral interface 1311 is disposed on the control processor 131, and the analog-to-digital converter 122 is wirelessly connected to the control processor 131 through the first serial peripheral interface 1221 and the second serial peripheral interface 1311.
Further, a third serial peripheral interface 1312 is further disposed on the control processor 131, a fourth serial peripheral interface 1321 is disposed on the communication module 132, and the control processor 131 and the communication module 132 are wirelessly connected through the third serial peripheral interface 1312 and the fourth serial peripheral interface 1321.
Further, the eight-lead myoelectric acquisition system 100 further includes: and a power supply 150 electrically connected to the analog-to-digital converter 122 and the control processor 131, wherein the power supply 150 is configured to supply power to the analog-to-digital converter 122 and the control processor 131 so as to ensure continuous operation of the analog-to-digital converter 122 and the control processor 131.
To sum up, eight lead flesh electricity collection system 100 be networked embedded system, concrete during operation, the staff encircles the flexible electrode 1111 laminating of eight lead flesh electricity collection sensor 111 in the arm muscle (near the finger extensor muscle) department of testee, flexible electrode 1111 gathers the flesh electricity signal of testee to the flesh electricity signal transmission to preprocessing circuit 121 that will gather, preprocessing circuit 121 carries out low pass filtering preliminary treatment to flesh electricity signal to will pass through the flesh electricity signal transmission after the preliminary treatment to analog-to-digital converter 122, simultaneously the host computer passes through communication module 132 and control processor 131 and sends control command to analog-to-digital converter 122, with control the flesh electricity signal that analog-to-digital converter 122 will be to the preliminary treatment carries out filtering, amplification and analog-to-digital conversion and handles to flesh electricity signal transmission to control processor 131 after will pass through analog-to-digital conversion, and control processor 131 carries out data processing to the flesh electricity signal that receives, data transmission to communication module 132 after will handling simultaneously, communication module 132 is with data transmission to the supreme, the host computer carries out analysis, handles and show data.
The number of apparatuses and the scale of the process described here are intended to simplify the description of the present invention. Applications, modifications and variations of the present invention will be apparent to those skilled in the art.
While embodiments of the invention have been disclosed above, it is not intended that they be limited to the applications set forth in the specification and examples. It can be applicable to various and be fit for the utility model discloses a field completely. Additional modifications will readily occur to those skilled in the art. The invention is therefore not to be limited to the specific details and illustrations shown and described herein, without departing from the general concept defined by the claims and their equivalents.
Claims (9)
1. An eight-lead myoelectric acquisition system, comprising:
an acquisition unit (110);
a pre-processing unit (120) electrically connected with the acquisition unit (110);
a control unit (130) wirelessly connected with the preprocessing unit (120); and
a receiving unit (140) wirelessly connected with the control unit (130);
the collecting unit (110) comprises an eight-lead myoelectricity collecting sensor (111), the myoelectricity collecting sensor (111) comprises at least 8 flexible electrodes (1111), and each flexible electrode (1111) is arranged in parallel.
2. The eight-lead myoelectric acquisition system according to claim 1 wherein the pre-processing unit (120) comprises: a pre-processing circuit (121) electrically connected with the eight-lead myoelectric acquisition sensor (111); and
an analog-to-digital converter (122) electrically connected to the pre-processing circuit (121);
the preprocessing circuit (121) is used for receiving the electromyographic signals acquired by the eight-lead electromyographic acquisition sensor (111) and performing low-pass filtering preprocessing on the electromyographic signals, and the analog-to-digital converter (122) performs filtering, amplification and analog-to-digital conversion processing on the preprocessed electromyographic signals.
3. The eight-lead electromyography acquisition system of claim 2, wherein the analog-to-digital converter (122) employs an ADS1299 chip.
4. The eight-lead myoelectric acquisition system according to claim 2 wherein the control unit (130) comprises: a control processor (131) wirelessly connected with the analog-to-digital converter (122); and
a communication module (132) wirelessly connected to the control processor (131) and the receiving unit (140);
the control processor (131) is configured to receive the electromyographic signals processed by the analog-to-digital converter (122), perform data processing on the received electromyographic signals, transmit the processed data to the communication module (132), and transmit the data to the receiving unit (140) by the communication module (132).
5. The eight-lead myoelectricity acquisition system according to claim 4, wherein the control processor (131) adopts an STM32F103 chip, and the communication module (132) adopts an ALK8266WIFI communication interface module.
6. The eight-lead myoelectric acquisition system according to claim 4, wherein the receiving unit (140) is an upper computer, and the upper computer is wirelessly connected with the communication module (132);
the upper computer is used for receiving the data sent by the communication module (132), and analyzing, processing and displaying the data.
7. The eight-lead myoelectricity acquisition system according to claim 4, wherein a first serial peripheral interface (1221) is provided on the analog-to-digital converter (122), a second serial peripheral interface (1311) is provided on the control processor (131), and the analog-to-digital converter (122) and the control processor (131) are wirelessly connected through the first serial peripheral interface (1221) and the second serial peripheral interface (1311).
8. The eight-lead myoelectricity acquisition system according to claim 4, wherein a third serial peripheral interface (1312) is further disposed on the control processor (131), a fourth serial peripheral interface (1321) is disposed on the communication module (132), and the control processor (131) and the communication module (132) are wirelessly connected through the third serial peripheral interface (1312) and the fourth serial peripheral interface (1321).
9. The eight-lead myoelectric acquisition system of claim 4 further comprising: a power supply (150) electrically connected to the analog-to-digital converter (122) and the control processor (131).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221413807.4U CN218852715U (en) | 2022-06-07 | 2022-06-07 | Eight-lead myoelectricity acquisition system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202221413807.4U CN218852715U (en) | 2022-06-07 | 2022-06-07 | Eight-lead myoelectricity acquisition system |
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| CN218852715U true CN218852715U (en) | 2023-04-14 |
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| CN202221413807.4U Active CN218852715U (en) | 2022-06-07 | 2022-06-07 | Eight-lead myoelectricity acquisition system |
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