CN201727511U

CN201727511U - Multichannel surface myoelectricity collecting and analyzing system

Info

Publication number: CN201727511U
Application number: CN201020263663XU
Authority: CN
Inventors: 余传意; 王殊轶; 张朋; 王慧芳; 谭杰
Original assignee: University of Shanghai for Science and Technology
Current assignee: University of Shanghai for Science and Technology
Priority date: 2010-07-20
Filing date: 2010-07-20
Publication date: 2011-02-02
Anticipated expiration: 2020-07-20

Abstract

The utility model relates to a multichannel surface myoelectricity collecting and analyzing system. Each channel comprises a positive electrode, a reference electrode and a negative electrode; the three electrodes are attached on the surface of the muscle and the direction along which the three electrodes are attached is in parallel with the fiber direction of the muscle; the three electrode signals in each channel are transmitted into the corresponding input ports of a signal processor through a three-core shielding cable and a signal connector; the processed signals are transmitted to a data collecting card by the signal processor through a cable conductor and to be processed, and then the acquired data are transmitted to a computer through a communication interface to be analyzed. Four-way myoelectric signals can be denoised simultaneously; multiple shielding measures are used to shield the outside interference and the signals are effectively amplified, thereby the weak electric signals are amplified into the standard electric signals easily identified; because a software system is developed with the virtual instrument technology, the development of the software system is shortened greatly, the function expansion of the software system is easily achieved and the myoelectric signals can also be analyzed and processed in some special conditions.

Description

The multi-channel surface myoelectric acquisition analysis system

Technical field

This utility model relates to a kind of Signal Collection Technology, particularly a kind of multi-channel surface myoelectric acquisition analysis system.

Background technology

Surface electromyogram signal (surface electromyogram, sEMG) be that myoelectrical activity is in the time at skin surface place and the synthesis result on the space under a kind of epidermis of complexity, its check and analysis are significant to clinical diagnosis and rehabilitation medicine, sports medical science, ergonomics etc.Because the people is in motion or operation process, each action is by the symphyogenetic result of polylith muscle, all needs simultaneously polylith muscle to be carried out real-time signal analysis in above-mentioned research, can draw research conclusion comparatively accurately.Therefore, require the surface myoelectric acquisition analysis system to gather, to handle and to analyze polylith muscle simultaneously.In addition, because it is little that the amplitude of surface electromyogram signal compares, be generally tens microvolts to the hundreds of microvolt, and very easily be subjected to the external signal interference of noise, therefore the particularly interference of 50Hz power frequency, requires acquisition system should have fine external disturbance shielding action and good noise removal function, and need the appropriate signals amplification, more effectively to gather useful information.

In addition, present myoelectricity acquisition system of selling on the market, function ratio is more single mostly, data processing function is more fixing, be unfavorable for that some are in particular cases to the analyzing and processing of myoelectricity, also be difficult for carrying out the expansion of systemic-function, and the price comparison costliness, this has certain economic pressure to subject study.

Summary of the invention

This utility model is the problem at present myoelectricity acquisition system function dullness, a kind of multi-channel surface myoelectric acquisition analysis system has been proposed, simultaneously four tunnel electromyographic signals are carried out denoising, taked multiple shielding measure shielding external disturbance, and having carried out effective signal amplifies, the standard electric signal that the faint signal of telecommunication is zoomed into easily be identified, adopt the software system of virtual instrument technique exploitation, the construction cycle of system is shortened greatly, and the easier expansion of carrying out systemic-function is satisfied some in particular cases to the analysis and the processing of electromyographic signal.

The technical solution of the utility model is: a kind of multi-channel surface myoelectric acquisition analysis system, comprise several passages, the three-core shielding cable, Signal connector, signal processor, cable, data collecting card, communication interface and computer, each passage comprises an anelectrode, a reference electrode, a negative electrode, anelectrode, reference electrode, negative electrode is attached at the surface of muscle, the direction of three electrode attachings is parallel with the meat fiber direction, three electrode signals of each passage are by the three-core shielding cable, Signal connector is sent in the corresponding input port of signal processor, signal processor output after the data collecting card deal with data, is arrived computer analysis through communication interface by cable.

Described signal processor comprises the conditioning module circuit, power module and collection terminal, power module provides power supply for each conditioning module circuit, the collection terminal is that the lead-out terminal of signal processor is connected with cable, the conditioning module circuit comprises instrumentation amplifier successively, every straight high-pass filtering circuit, the 50Hz power frequency is disturbed trap circuit, the second-order low-pass filter circuit, main amplifying circuit, the differential input end anode of electrode anode signal and instrumentation amplifier joins, the differential input end negative terminal of electrode negative signal and instrumentation amplifier joins, the reference potential end of reference electrode and instrumentation amplifier joins, and the copper layer that covers of the screen layer of three-core cable line and conditioning module circuit joins.

The beneficial effects of the utility model are: this utility model multi-channel surface myoelectric acquisition analysis system, this system not only can be good at external disturbance is shielded, the noise that is mingled in the signal is carried out filtering, and to multichannel myoelectricity date processing, to analyze real-time better.It can more embody its use value to the analysis of polylith muscle signal, can be widely used in rehabilitation engineering, sports science, ergonomics etc. need research to the muscle signal of telecommunication in the middle of.

Description of drawings

Fig. 1 is this utility model multi-channel surface myoelectric acquisition analysis system structural representation block diagram;

Fig. 2 is a conditioning module electrical block diagram in this utility model multi-channel surface myoelectric acquisition analysis system;

Fig. 3 is a power module structural representation in this utility model multi-channel surface myoelectric acquisition analysis system.

The specific embodiment

Multi-channel surface myoelectric signal processing and analysis system structure sketch map as shown in Figure 1, comprise anelectrode 1, reference electrode 2, negative electrode 3, three-core shielding cable 8, Signal connector 12, signal processor 4, cable 7, data collecting card 6, communication interface 9 and computer 10, anelectrode 1,

reference electrode

2,3 three signals of negative electrode are by three-core shielding cable 8, Signal connector 12 is sent in the signal processor 4, after signal processor 4 outputs are arrived data collecting card 6 deal with data by cable 7,, utilize to computer 10 through communication interface 9 based on the independently developed signal processing and analysis software analysis of LabVIEW9.0 data.

When carrying out electromyographic signal collection, each passage has three electrodes, is respectively: anelectrode 1, reference electrode 2, negative electrode 3.Three electrode pastes invest the surface of muscle, the direction of three electrode attachings is general parallel with the meat fiber direction, the signal on each road is through three-core shielding cable 8, be input to signal processor 4 through Signal connector 12, carry out the conditioning of signal, signal processor 4 comprises conditioning module circuit 11, power module 13 and collection terminal 5, power module 13 provides power supply for each conditioning module circuit 11, collection terminal 5 is that the lead-out terminal of signal processor 4 is connected with cable 7, provided the structural representation of conditioning module circuit among Fig. 2, the conditioning module circuit comprises instrumentation amplifier 14 successively, every straight high-pass filtering circuit, the 50Hz power frequency is disturbed trap circuit, the second-order low-pass filter circuit, main amplifying circuit, the differential input end anode of electrode anode 1 signal and instrumentation amplifier 14 joins, the differential input end negative terminal of electrode negative pole 3 signals and instrumentation amplifier 14 joins, the reference potential end of reference electrode and instrumentation amplifier joins, the copper layer 15 that covers of the screen layer of three-core cable line and conditioning module circuit 11 joins, signal is through after the elementary amplification of instrumentation amplifier 14, pass through respectively again every straight high-pass filtering, 50Hz power frequency interference trap trap, second-order low-pass filter, the amplification of main amplifying circuit, remove the noise in the signal, signal is amplified effectively, become the normal voltage signal that can be discerned by capture card, native system can amplify 3500～4000 times to signal.The power supply of conditioning module is provided by power module circuitry 13, the structural representation of power module circuitry 13 as shown in Figure 3, initial power supply signal is provided by pci data capture card 6, pass through power supply ripple filtering module 16 again, removing the ripple that exists in the power supply disturbs, power supply after the processing+9V is through modular converter 17, the negative supply of output-9V, and can be conditioning module circuit 11 provides+power supply of 9V and-9V.The signal condition module can be worked in bigger signal amplification range.Through the conditioned normal voltage signal of signal condition module 11, be input to the analogue signal input channel of data collecting card 6 by collection terminal 5 and cable 7, carry out the analog digital conversion of signal, to convert the digital signal that computer 10 can be handled to, in computer 10, use pattern development software LabVIEW 9.0 development system softwares, finish myoelectricity data acquisition, processing, demonstration, analysis and storage.Analytical applications in order to follow-up study.

Claims

1. multi-channel surface myoelectric acquisition analysis system, it is characterized in that, comprise several passages, the three-core shielding cable, Signal connector, signal processor, cable, data collecting card, communication interface and computer, each passage comprises an anelectrode, a reference electrode, a negative electrode, anelectrode, reference electrode, negative electrode is attached at the surface of muscle, the direction of three electrode attachings is parallel with the meat fiber direction, three electrode signals of each passage are by the three-core shielding cable, Signal connector is sent in the corresponding input port of signal processor, signal processor output after the data collecting card deal with data, is arrived computer analysis through communication interface by cable.

2. according to the described multi-channel surface myoelectric acquisition analysis system of claim 1, it is characterized in that, described signal processor comprises the conditioning module circuit, power module and collection terminal, power module provides power supply for each conditioning module circuit, the collection terminal is that the lead-out terminal of signal processor is connected with cable, the conditioning module circuit comprises instrumentation amplifier successively, every straight high-pass filtering circuit, the 50Hz power frequency is disturbed trap circuit, the second-order low-pass filter circuit, main amplifying circuit, the differential input end anode of electrode anode signal and instrumentation amplifier joins, the differential input end negative terminal of electrode negative signal and instrumentation amplifier joins, the reference potential end of reference electrode and instrumentation amplifier joins, and the copper layer that covers of the screen layer of three-core cable line and conditioning module circuit joins.