CN201537319U - EMG feedback electric stimulator - Google Patents

Abstract

Translated fromChinese

本实用新型提供了一种肌电反馈式电刺激仪，它包括电源管理模块、微处理器、语音录放控制模块、信号灯控制模块、触控式可编程模块、肌电信号处理及反馈模块、波形调制模块、刺激电流检测及过电流保护模块和波形驱动模块。本实用新型应用语音及信号灯作为指导，提示患者主动参与训练，促使患者主动参与康复治疗，并对患者主动诱发的肌电信号进行无创测量、特征值提取，当自发肌电信号达到设定的肌电诱发值时，装置产生电刺激作用于患者肌肉，实现了康复治疗过程的智能化。

The utility model provides a myoelectric feedback type electric stimulator, which includes a power management module, a microprocessor, a voice recording and playback control module, a signal light control module, a touch programmable module, a myoelectric signal processing and feedback module, a waveform Modulation module, stimulation current detection and overcurrent protection module and waveform driving module. The utility model uses voice and signal lights as guidance to prompt patients to actively participate in training, urges patients to actively participate in rehabilitation treatment, and performs non-invasive measurement and feature value extraction on the myoelectric signals actively induced by patients. When the spontaneous myoelectric signals reach the set muscle When the electrical evoked value is lower, the device generates electrical stimulation to act on the patient's muscles, realizing the intelligence of the rehabilitation treatment process.

Description

The myoelectric feedback electric stimulating instrument

Technical field

This utility model relates to a kind of medical apparatus and instruments, relates in particular to a kind of myoelectric feedback electric stimulating instrument that helps weak muscle strength patient rehabilitation.

Background technology

Cerebrovascular is the commonly encountered diseases of China, has 70-80% to leave in various degree dysfunction in the patient of existence approximately, wherein most important the unusual of motor function that comprise.At the early stage dyskinesia that occurs of patients with cerebrovascular disease, carry out the low-frequency electrostimulating therapy by the electronic stimulation device, can excite that muscle is passive to have the rhythm and pace of moving things to shrink, thereby strengthen muscular blood circulation and nutrition supply, promote nerve excitability and motor function recovery.

By the method muscle strength reinforcing of electricity irritation, existing relevant patent.Provided a kind of functional electric stimulation system and method thereof as patent 200510065043.9, patent 02830155.2 has designed a kind of portable electronic stimulation device, and patent 200620039948.9 has provided a kind of signal formula functional electric stimulation instrument.But these patents are all paid attention to single electricity irritation, do not guide the patient initiatively to participate in treatment and training, are easy to cause patient's maincenter imbalance, cause the spasm of Antagonistic muscle, cause the failure of training.

The utility model content

The purpose of this utility model is exactly in order to provide a kind of myoelectric feedback electric stimulating instrument that can guide the patient initiatively to participate in and treat and train.

In order to achieve the above object, this utility model has adopted following technical scheme: a kind of myoelectric feedback electric stimulating instrument comprises that power management module, microprocessor, speech recording and reproducing control module, signal lights control module, touch programmable module, electromyographic signal processing and feedback module, waveform modulated module, stimulating current detect and overcurrent protection module and drive waveform module; Power management module is converted to external D.C. regulated power supply or cell voltage the required electric pressure of each electricity consumption module and outputs to each electricity consumption module; A plurality of outfans of microprocessor connect the input of speech recording and reproducing control module, signal lights control module and waveform modulated module respectively, and microprocessor also detects and two-way connection of overcurrent protection module input and output with stimulating current with touch programmable module, electromyographic signal processing and feedback module; Another outfan of electromyographic signal processing and feedback module connects another input of waveform modulated module; Another outfan of waveform modulated module connects another input of stimulating current detection and overcurrent protection module; Another outfan of stimulating current detection and overcurrent protection module connects the input of drive waveform module; The drive waveform module is provided with two output channels.

Described electromyographic signal is handled and feedback module comprises that myoelectricity pickoff electrode, signal pickup circuit, eigenvalue extract circuit and feedback control circuit; The outfan of myoelectricity pickoff electrode connects the input of signal pickup circuit; The outfan connection features value of signal pickup circuit is extracted the input of circuit; Eigenvalue extracts an input of the outfan connection microprocessor of circuit; The input of feedback control circuit connects an outfan of microprocessor; Eigenvalue extracts the characteristic quantity that circuit is exported tested electromyographic signal, and by microprocessor itself and default myoelectricity is brought out value and compare, and by the output of feedback control circuit control electric stimulating instrument, wherein, myoelectricity brings out value can realize the self adaptation adjusting.

Described myoelectricity pickoff electrode is the bikini pickoff electrode, comprising a reference signal electrode.

Described signal pickup circuit is linked in sequence by preamplifier, high pass filter, low pass filter, 50Hz wave trap and post-amplifier and forms, the input of preamplifier connects the outfan of myoelectricity pickoff electrode, and the outfan connection features value of post-amplifier is extracted the input of circuit.

Described speech recording and reproducing control module is recorded the hint instructions of different language, and is play by procedure auto-control in therapeutic process.

Be provided with the signal lamp of flicker by different way in the described signal lights control module.

Myoelectric feedback electric stimulating instrument of the present utility model have following advantage and and characteristics:

1, by voice and signal lights the patient is carried out audition, visual cues, instruct the patient initiatively to participate in treatment according to instruction, with consciousness inducing myoelectric potential signal, and to the signal of telecommunication of motion muscle group carry out non-invasive measurement, eigenvalue extracts, compare by eigenvalue and preset value patient's inducing myoelectric potential, control the output of electric stimulating instrument, thereby realized the intellectuality of rehabilitation.

2, this utility model electric stimulating instrument is portable, two groups of independence output channels are arranged, in treatment, can monitor the size of each passage stimulating current in real time, be presented on the LCD, if stimulating current is excessive, can cuts off the output of electric stimulating instrument by microprocessor control unit, and give the alarm, remind doctor or patient to note, thereby improve the safety of using.

3, the hint instructions of different language can be recorded, and, country variant and the geographic needs of different dialects can be satisfied by the broadcast of hint instructions in the procedure auto-control therapeutic process; Simultaneously, be equipped with the signal lamp of different flashing modes, thus in audition and visually instruct the patient by operational order initiatively participate in the treatment.

4, adopting bikini surface myoelectric pickoff electrode that the signal of telecommunication of patient moving muscle group is carried out noinvasive picks up, and carry out that follow-up signal is handled and the eigenvalue extraction, compare by eigenvalue and preset value, by the output of microprocessor control electric stimulating instrument patient's inducing myoelectric potential.Preset value can be adjusted by the touch screen human-computer interaction interface by the practical situation of doctor according to the patient; Perhaps carry out the self adaptation adjustment by instrument.

5, this utility model is designed to touch-screen type man-machine interaction mode, fixed prescription pattern and free programming mode can be provided, be convenient to the doctor and select different fixed prescriptions for use according to the different state of an illness, or by the touch man-machine interaction stimulus parameter is set accurately, control accuracy height, motility are good.Simultaneously, dynamically show the various parameters in the electronic stimulation process, comprise remaining time, stimulating current size of treatment cycle etc.

Description of drawings

Fig. 1 is a block diagram of the present utility model.

Fig. 2 is that the electromyographic signal in this utility model is handled and the structural representation of feedback module.

Fig. 3 is the topology diagram that eigenvalue extracts circuit.

Fig. 4 is the SPI communication interface figure of speech chip.

The specific embodiment

Referring to Fig. 1, Fig. 2; this utility model myoelectric feedback electric stimulating instrument comprises thatpower management module 1,microprocessor 2, speech recording and reproducingcontrol module 3, signallights control module 4, touchprogrammable module 5, electromyographic signal processing andfeedback module 6, waveform modulatedmodule 7, stimulating current detect andovercurrent protection module 8 and drive waveform module 9.Power management module 1 is converted to external D.C. regulated power supply or cell voltage the required electric pressure of each electricity consumption module and outputs to each electricity consumption module; A plurality of outfans ofmicroprocessor 2 connect the input of speech recording and reproducingcontrol module 3, signallights control module 4 and waveform modulatedmodule 7 respectively, andmicroprocessor 2 also handles with touchprogrammable module 5, electromyographic signal andfeedback module 6 detects and two-way connection ofovercurrent protection module 8 input and output with stimulating current.Another input of another outfan connection waveform modulatedmodule 7 of mould .6 is handled and fed back to electromyographic signal; Another outfan of waveform modulatedmodule 7 connects another input of stimulating current detection andovercurrent protection module 8; Another outfan of stimulating current detection andovercurrent protection module 8 connects the input ofdrive waveform module 9;Drive waveform module 9 is provided with two output channels 101,102.

Electromyographic signal in this utility model is handled andfeedback module 6 comprises that myoelectricity pickoff electrode 61, signal pickup circuit 62, eigenvalue extract circuit 63 and feedback control circuit 64.Myoelectricity pickoff electrode 61 wherein is the bikini pickoff electrode, comprising a reference signal electrode.Signal pickup circuit 62 is linked in sequence by preamplifier 621, high pass filter 622, low pass filter 623,50Hz wave trap 624 and post-amplifier 625 and forms, the input of preamplifier 621 connects the outfan of myoelectricity pickoff electrode 61, and the outfan connection features value of post-amplifier 625 is extracted the input of circuit 63.Eigenvalue extracts an input of theoutfan connection microprocessor 2 of circuit 63; The input of feedback control circuit 64 connects an outfan ofmicroprocessor 2; Eigenvalue extracts the characteristic quantity that circuit is exported tested electromyographic signal, and by microprocessor itself and default myoelectricity is brought out value and compare, and by the output of feedback control circuit control electric stimulating instrument, wherein, myoelectricity brings out value can realize the self adaptation adjusting.

Operation principle of the present utility model is that power management module is converted to the required electric pressure of each circuit module with external D.C. regulated power supply or cell voltage.Microprocessor obtains under the touch programmable module parameter that is provided with that passes, and the stimulating current value that detects is uploaded to the touch programmable module shows in real time; Drive the speech recording and reproducing control module according to operating process and finish corresponding prompt instruction broadcast in the therapeutic process, simultaneously, drive the signal lights flashing mode that the signal lights control module realizes different instruction, and read the myoelectricity eigenvalue that initiatively brings out by the patient that electromyographic signal is handled and feedback module detects, the output of control stimulus waveform is coordinated each functional module according to the treatment procedure true(-)running.Behind the electric stimulating instrument power-up initializing, at first read and leave E in²The stimulus parameter of the various fixed prescriptions among the PROM, chosen when a certain fixed prescription, send interrupt requests by the touch programmable module, microprocessor obtains the numbering of chosen prescription, and from E²Read corresponding prescribed parameters among the PROM.The electromyographic signal that the patient initiatively brings out is handled through characteristic extracting module, when the myoelectricity eigenvalue that records reaches preset value, microprocessor control boost pulse produces circuit and generates required stimulus waveform in the prescription, outputs to stimulating electrode by drive waveform module and booster transformer.And for freely programming the treatment pattern, the operator can accurately be provided with various stimulus parameters, by microprocessor and the communication of touch programmable module, obtains the parameter of setting, produces corresponding pulse.The pulse output adopts optocoupler or solid-state relay to isolate from electric with patient's electrodes in contact and boost pulse generation circuit, with the safety of guaranteeing to use.

The amplitude range that this utility model is considered electromyographic signal between the 5mV, certainly will be subjected to the common mode disturbances of diversity of settings noise and other electro-physiological signals of human body at 2 μ V; Secondly, the contact impedance between surface electrode and the skin is than higher, and the electromyographic signal source is the signal source of a high internal resistance, has therefore designed the preamplifier of high cmrr, low noise, low drift, high input impedance.

Through amplification and filtered electromyographic signal, be an alternate electrical signal, if this signal is gathered in real time, need higher sample frequency, and the data volume of gathering is very huge, this gives data storage and handles and also brought very big difficulty.For reducible data collection and processing, design eigenvalue and extracted circuit, the method that has adopted signal characteristic quantity to extract need not dynamic waveform is gathered in real time.The interference that is subject to outside noise owing to the amplitude of signal is fluctuateed, and jitter, poor repeatability, poor anti jamming capability have adopted virtual value (RMS) detection scheme based on Δ ∑ technology, extracts the virtual value characteristic quantity of electromyographic signal.Eigenvalue extracts the topological structure of circuit referring to Fig. 3.Wherein, Δ ∑ manipulator is as divider, and a simple polarity switch is used as multiplier, the result of calculation that is input as multiplier of low pass filter LPF, and LPF obtains the virtual value that on average forms of this value and exports.

Adopt rms signal eigenvalue extracting method, the electromyographic signal that frequency range mainly is distributed in 10Hz to 500Hz is converted to level signal, comes the quantitative measurement patient initiatively to participate in training and the surface electromyogram signal that brings out with this.Microprocessor reads this level signal, compares with preset value then, and the output of control electric stimulation therapeutic apparatus, thus realize intellectual rehabilitation.

In order to realize the sound prompt function of electric stimulating instrument, and can record the hint instructions of different language, this utility model has designed the speech recording and reproducing control module.The pattern of speech recording and reproducing control module is designed to all operations and must controls by chip microprocessor, and operational order realizes by the SPI serial communication interface.The SPI shift register of chip microprocessor is in the action of the trailing edge of clock, latchs the data of MOSI pin at rising edge clock, at trailing edge data delivered to the MISO pin.In design, adopt software simulation method,, realize the transfer of data between single-chip microcomputer and the speech chip by software program simulation SPI communication sequential based on the single-chip processor i/o mouth.The hardware circuit diagram design of SPI interface is referring to Fig. 4.Wherein, the effective slave of P1.0 simulation SPI low level selecting side, the serial clock output lead of P1.1 simulation SPI, the main equipment data output end of P1.2 simulation SPI, P1.3 simulation main equipment data input pin.P1.4 is operated in I/O mouth status poll mode.

Each therapeutic process of this utility model electric stimulating instrument all is made up of a plurality of stimulation cycle, and each thorn flyback cycle comprises that mainly initiatively inducing myoelectric potential stage, treatment output stage and relaying loosen the stage.After therapeutic instrument powers on, at first carry out the initialization of each functional module, on the LCD touch screen, show interface of main menu then, wait for that the doctor carries out the selection or the parameter setting of treatment prescription.Stimulus parameter comprises treatment total time, stimulation time, intermittent time, stimulation pulsewidth, stimulus frequency, stimulus intensity, myoelectricity threshold value.Behind selected treatment prescription, click the start button on the interface, this instrument sends phonetic order and signal lights flicker, the prompting patient enters the initiatively inducing myoelectric potential stage, when bringing out value, patient's myoelectricity reaches the myoelectricity threshold value, promptly export corresponding stimulus waveform and act on patient's muscle according to the stimulus parameter of setting, enter the treatment output stage, reach stimulation time when treatment time, instrument stops output, enters relaying and loosens the stage, and the time of loosening the stage when relaying reaches the intermittent time, instrument then reappears voice and signal lights prompting, begins electronic stimulation of following one-period.In first active inducing myoelectric potential stage, if the electromyographic signal that the patient brings out can't reach the myoelectricity threshold value in the section sometime all the time, instrument then can reduce a grade with the myoelectricity threshold value automatically after the prompting of " ticking " sound, reach threshold value up to the inducing myoelectric potential value, and amended myoelectricity threshold value is upgraded on touch screen in real time.When therapeutic process reaches default treatment total time, instrument stops output automatically, and sends Tip Sound.

This utility model application voice and signal lights are as guidance, the prompting patient initiatively participates in training, impel the patient initiatively to participate in rehabilitation, and the electromyographic signal that the patient initiatively brings out is carried out non-invasive measurement, eigenvalue extract, when the myoelectricity that reaches setting when spontaneous electromyographic signal brings out value, device produces electricity irritation and acts on patient's muscle, has realized the intellectuality of rehabilitation process.This utility model volume is little, safe and reliable, cheap.

Claims (6)

1. a myoelectric feedback electric stimulating instrument is characterized in that: comprise that power management module, microprocessor, speech recording and reproducing control module, signal lights control module, touch programmable module, electromyographic signal processing and feedback module, waveform modulated module, stimulating current detect and overcurrent protection module and drive waveform module; Power management module is converted to external D.C. regulated power supply or cell voltage the required electric pressure of each electricity consumption module and outputs to each electricity consumption module; A plurality of outfans of microprocessor connect the input of speech recording and reproducing control module, signal lights control module and waveform modulated module respectively, and microprocessor also detects and two-way connection of overcurrent protection module input and output with stimulating current with touch programmable module, electromyographic signal processing and feedback module; Another outfan of electromyographic signal processing and feedback module connects another input of waveform modulated module; Another outfan of waveform modulated module connects another input of stimulating current detection and overcurrent protection module; Another outfan of stimulating current detection and overcurrent protection module connects the input of drive waveform module; The drive waveform module is provided with two output channels.

2. myoelectric feedback electric stimulating instrument as claimed in claim 1 is characterized in that: described electromyographic signal is handled and feedback module comprises that myoelectricity pickoff electrode, signal pickup circuit, eigenvalue extract circuit and feedback control circuit; The outfan of myoelectricity pickoff electrode connects the input of signal pickup circuit; The outfan connection features value of signal pickup circuit is extracted the input of circuit; Eigenvalue extracts an input of the outfan connection microprocessor of circuit; The input of feedback control circuit connects an outfan of microprocessor; Eigenvalue extracts the characteristic quantity that circuit is exported tested electromyographic signal, and by microprocessor itself and default myoelectricity is brought out value and compare, and by the output of feedback control circuit control electric stimulating instrument, wherein, myoelectricity brings out value can realize the self adaptation adjusting.

3. myoelectric feedback electric stimulating instrument as claimed in claim 2 is characterized in that: described myoelectricity pickoff electrode is the bikini pickoff electrode, comprising a reference signal electrode.

4. myoelectric feedback electric stimulating instrument as claimed in claim 2, it is characterized in that: described signal pickup circuit is linked in sequence by preamplifier, high pass filter, low pass filter, 50Hz wave trap and post-amplifier and forms, the input of preamplifier connects the outfan of myoelectricity pickoff electrode, and the outfan connection features value of post-amplifier is extracted the input of circuit.

5. myoelectric feedback electric stimulating instrument as claimed in claim 1 is characterized in that: described speech recording and reproducing control module is recorded the hint instructions of different language, and is play by procedure auto-control in therapeutic process.

6. myoelectric feedback electric stimulating instrument as claimed in claim 1 is characterized in that: be provided with the signal lamp of flicker by different way in the described signal lights control module.

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