CN101482773A - Multi-channel wireless surface myoelectric signal collection apparatus and system - Google Patents
Multi-channel wireless surface myoelectric signal collection apparatus and system Download PDFInfo
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Abstract
The present invention discloses a multi-channel wireless surface electromyography signal transmitter. The technical solution is that the multi-channel wireless surface electromyography signal transmitter comprises the following components: a signal collecting module which is used for collecting the surface electromyography signal; and a modulating transmitting module which is used for modulating the surface electromyography signal collected by the signal collecting module and transmits the modulated surface electromyography signal through a wireless transmission mode. The surface electromyography signal is analog signal. The invention also discloses a multi-channel wireless surface electromyography signal receiver, a display and a system thereof. The multi-channel wireless surface electromyography signal transmitter according to the technical solution of the invention has the advantages of miniaturization, high precision, low noise, low power consumption, easy wearing, easy carrying, elimination of industrial frequency interference, and settlement of problems existing in the prior art.
Description
Technical field
The present invention relates to surface electromyogram signal acquisition technique field in the man-machine interaction, be specifically related to a kind of multi-channel wireless surface myoelectric signal collection apparatus and system.
Background technology
At present, based on SEMG (Surface ElectroMyoGraphy, surface electromyogram signal) man-machine interactive system of signal is discerned different gesture motion by the surface electromyogram signal that myoelectric sensor collects on corresponding muscle group, because recognition result not only can reflect stretching of joint state in the wrong and intensity, can also reflect in real time hand in the gesture complete process shape, position, towards and movable information, aspect gesture identification, has special advantages, therefore be used in multiple computer interface control, in fields such as artificial limb, consumer electronics and video-game control.
In the Surface Electromyography Signal Acquisition System that can be used for the gesture input, because described system is as the interface of man-machine interaction input, need to embody the portability and the naturality of man-machine interaction, require myoelectric sensor can not be gathered environmental limit, have characteristics such as wearable, low-power consumption and volume are little; In addition, because the amplitude of surface electromyogram signal is smaller, be generally tens microvolts to the hundreds of microvolt, like this to discerning based on the gesture motion of surface electromyogram signal and during with the recognition result control peripheral devices, just requiring to adopt the low noise myoelectric sensor of high precision to obtain the surface electromyogram signal of high s/n ratio.
In order to improve recognition effect, adopt hyperchannel SEMG acquisition technique based on the gesture motion of surface electromyogram signal more.The myoelectric sensor that uses mostly is commercial company greatly and produces, and is not that to aim at man-machine interaction designed, is generally wireline equipment, as Delsys surface myoelectric detecting and analysing system and Bagnoli line style surface myoelectric acquisition system is arranged.These wireline equipments have guaranteed the quality of acquired signal, and use in the laboratory that is fit to all researchs.
But wired surface myoelectric is gathered this mode and have not convenient property in the realization of man-machine interaction, mainly shows:
(1) when the collection surface electromyographic signal, to bind the electrode that much has long line on experimenter's the upper arm, this not only makes collecting device seem that too fat to move being not easy to dress, and when the auxiliary gesture action recognition input of other position muscle groups need be moved significantly, the gesture input that wired connection makes the experimenter be not easy to move significantly;
(2) easily producing power frequency disturbs: because surface electromyogram signal is very faint, but under many circumstances, in the laboratory environment of mains-supplied and computer display process surface electromyogram signal, the current potential of human body may exist sizable power frequency (the domestic 50Hz of being) voltage difference with the current potential of gathering with computer ground connection, disturbs so adopt power frequency notch filter to suppress power frequency usually.Yet the effective frequency range of surface electromyogram signal is 20Hz～1000Hz, comprise the 50Hz composition, therefore adopting trapper is not optimal scheme, and it makes wired surface myoelectric acquisition system also remove effective 50Hz surface electromyogram signal composition when removing the power frequency interference.
At the problem that wired surface myoelectric collection exists, associated companies and research institution release wireless myoelectricity acquisition system, and the main thought of its design provides mobility.Myomonitor IV wireless surface myoelectric signal acquisition system as the production of Delsys company, this system both available wireless transmission manner also can carry out collection, pre-service and the storage of surface electromyogram signal with the mode that the SD card is made the data storer, is suitable for the gesture input action under the mobile environment.Yet, though this mode has realized the Radio Transmission Technology between surface electromyogram signal acquisition electrode and signal Processing storage area and the PC, but be wired connection between the acquisition electrode of this equipment, signal Processing and the memory function module, some the time still exist and be not easy to dress and be not easy to the problem of gesture motion input significantly.Also having a kind of wireless surface myoelectric signal sensor at present is that collecting part, analog to digital conversion part, microcontroller part and radiating portion are all integrated, and will send digital signal by Wireless transmission mode through analog-to-digital surface electromyogram signal after receiving the synchronizing signal of receiving end.This integration mode gesture can increase the volume of sensor, can not satisfy microminiaturized requirement sometimes; And need consider the problem of signal Synchronization emission when adopting digital data transmission.
Summary of the invention
In view of above-mentioned existing in prior technology problem, the purpose of this invention is to provide a kind of multi-channel wireless surface myoelectric signal collection apparatus and system, have microminiaturization, high precision low noise, low-power consumption and wearable easily portable characteristics.
The objective of the invention is to be achieved through the following technical solutions:
The invention provides a kind of multi-channel wireless surface myoelectric signal emitter, described device comprises:
Signal acquisition module is used for the collection surface electromyographic signal;
The modulate emission module is used for the described surface electromyogram signal that described signal acquisition module collects is modulated, and the described surface electromyogram signal after the modulation is launched by Wireless transmission mode; Described surface electromyogram signal is a simulating signal.
Further, described modulate emission module specifically comprises:
Frequency modulation unit is used for according to the quality of described surface electromyogram signal and the requirement of receive frequency the frequency of described surface electromyogram signal being modulated;
Voltage regulation unit is used to described frequency modulation unit that burning voltage is provided, so that the frequency stabilization of described surface electromyogram signal frequency modulation emission;
Transmitter unit is used for the described surface electromyogram signal after the described frequency modulation unit modulation is sent with Wireless transmission mode.
Further, described signal acquisition module specifically comprises:
Collecting unit is used for the collection surface electromyographic signal;
Reference electrode is used to described collecting unit to gather described surface electromyogram signal reference voltage is provided, so that the voltage of the described surface electromyogram signal that collects is within the common-mode input range of amplifier.
Further, described collecting unit adopts the linear differential electrode of silvery, so that surface electromyogram signal is gathered.
Further, described device also comprises the amplification filtering module, is used for that the described surface electromyogram signal that described signal acquisition module collects is carried out amplification filtering and handles, so that the described surface electromyogram signal of described modulate emission module after will handling launched.
Further, described device also comprises power module, is used to described emitter to power.
The invention provides a kind of multi-channel wireless surface myoelectric signal receiving trap, described device comprises:
The receiving demodulation module is used to receive the surface electromyogram signal by after the modulation of wireless transmission method emission, and described surface electromyogram signal is carried out demodulation; Described surface electromyogram signal is a simulating signal;
Micro controller module, after being used for the described surface electromyogram signal after the demodulation of described receiving demodulation module carried out analog-to-digital conversion process, and with the described surface electromyogram signal output after the described processing, so that described surface electromyogram signal is handled.
Further, described micro controller module specifically comprises:
Signal processing unit, the described surface electromyogram signal that is used for receiving carries out analog-to-digital conversion process;
Signal output unit is used for and will exports by the mode of wireless or wire transmission through the described surface electromyogram signal after the analog-to-digital conversion process.
The invention provides a kind of multi-channel wireless surface myoelectric signal display device, described device comprises:
Memory module is used to receive and store by wireless transmission method and sends, through the surface electromyogram signal after the analog to digital conversion;
Display module is used for the described surface electromyogram signal with described memory module preservation, shows by corresponding mode.
The invention provides a kind of multi-channel wireless surface myoelectric signal acquisition system, described system comprises:
As the described a kind of multi-channel wireless surface myoelectric signal emitter of above-mentioned technical scheme;
As the described a kind of multi-channel wireless surface myoelectric signal receiving trap of above-mentioned technical scheme;
And, comprise as the described a kind of multi-channel wireless surface myoelectric signal display device of above-mentioned technical scheme.
Beneficial effect of the present invention:
In the technical scheme of the present invention, radiating portion in the Surface Electromyography Signal Acquisition System is separated with receiving unit, radiating portion and collecting part are set together, receiving unit and signal processing are set together, storage and display part are arranged on the PC end, can really accomplish to gather radiating portion and receiving unit wireless transmission, can guarantee that not only this electrode can be used for the input of any amplitude gesture motion, difficult wearing and not portable embarrassment have been avoided, and can reduce the volume of pick-up transducers significantly, realize that emitter can stick on any interested muscle group skin surface with double faced adhesive tape medically and carry out surface electromyogram signal collection and emission, thereby realize the microminiaturization and the wearable property of this acquisition system.
Adopt the device that transmits and receives of the present invention, the modulation signal that receives at receiving unit is a simulating signal, so not only need not consider the stationary problem of signal at transmitting terminal, only need unify control with the clock of microcontroller at receiving unit gets final product, and radiating portion separates fully with the PC grounded part, solve the problem that power frequency is disturbed effectively, kept effective 50Hz surface electromyogram signal composition;
In the simulating signal that signal acquisition part divides emission to modulate, need not carry out analog to digital conversion, signal processing can be separated with the collection radiating portion like this, further dwindled the volume of collection and radiating portion;
Adopt this mode that transmits and receives of the present invention, can be at the stable voltage that voltage regulation unit is partly exported so that the surface electromyogram signal that collects with signal acquisition module is modulated on the stable frequency, and the modulate emission module is as long as carry out the modulation of frequency with different stable magnitudes of voltage, just can realize the stable modulation of surface electromyogram signal different frequency, thereby realize the collection of multichannel wireless surface myoelectric signal easily.
Description of drawings
Fig. 1 is the embodiment of the invention one a described multi-channel wireless surface myoelectric signal emitter simplified structure synoptic diagram;
Fig. 2 is the fundamental diagram of voltage regulation unit described in the embodiment of the invention one;
Fig. 3 is the fundamental diagram of amplification filtering module described in the embodiment of the invention one;
Fig. 4 is the embodiment of the invention one a described multi-channel wireless surface myoelectric signal emitter back side simplified structure synoptic diagram;
Fig. 5 is the embodiment of the invention two described multi-channel wireless surface myoelectric signal receiving trap simplified structure synoptic diagram;
Fig. 6 is the embodiment of the invention three described multi-channel wireless surface myoelectric signal display device simplified structure synoptic diagram;
Fig. 7 is the embodiment of the invention four described wireless multi-channel surface myoelectric signal acquiring system simplified structure synoptic diagram.
Embodiment
Technical solutions according to the invention are by separating radiating portion in the wireless surface myoelectric signal acquisition system fully with receiving unit, wireless penetration and microminiaturization between the each several part in the wireless surface myoelectric signal acquisition system have been realized, thereby solved the embarrassment when moving the gesture input significantly, overcome wired acquisition system and easily produced the power frequency interference problem, had wearable and portable characteristics.
Radiating portion adopts the wireless transmit mode of simulating signal in technical solutions according to the invention, uses unified clock to carry out analog-to-digital conversion process at receiving unit, can consider the stationary problem of signal emission; On the problem of simulating signal emission, emphasis has considered how to stablize the problem of modulating frequency, different transmitter modules is modulated on the different stabilized frequencies, thus the collection of realization multi-channel wireless surface myoelectric signal.
Understanding for the ease of to technical scheme of the present invention is elaborated below in conjunction with embodiment.
Embodiment one:
As shown in Figure 1, a kind of multi-channel wireless surface myoelectric signal emitter of the present invention, described device comprises:
Signal acquisition module S11 is used for the collection surface electromyographic signal;
Modulate emission module S12 after being used for the described surface electromyogram signal that described signal acquisition module collects modulated, launches the described surface electromyogram signal after the modulation by Wireless transmission mode; Described surface electromyogram signal is a simulating signal.
Particularly, described modulate emission module specifically comprises:
Frequency modulation unit S121 is used for according to the quality of described surface electromyogram signal and the requirement of receive frequency the frequency of described surface electromyogram signal being modulated;
Voltage regulation unit S122 is used to described frequency modulation unit that burning voltage is provided, so that the frequency stabilization of described surface electromyogram signal frequency modulation emission;
Transmitter unit S123 is used for the described surface electromyogram signal after the described frequency modulation unit modulation is sent with Wireless transmission mode.
As shown in Figure 2, be the fundamental diagram of voltage regulation unit;
The modulate emission module comprises frequency modulation unit, voltage regulation unit and transmitter unit, owing to will guarantee the quality of received signal and determine distinguish the surface electromyogram signal of each passage, the surface electromyogram signal that collects stably need be modulated to emission again after the different frequencies.Control by the voltage and the external inductance value of frequency modulation unit because of the transmission frequency of the surface electromyogram signal of gathering again, so need the voltage regulation unit that the Select Error scope is little, precision is high.
Described in the present embodiment voltage regulation unit can the little voltage stabilizing chip of Select Error scope, such as the voltage stabilizing chip TPS79333 of Ti company, selects modulating frequency with the partial pressure value of its stable voltage.If will realize the collection of multi-channel wireless surface myoelectric signal, as long as the magnitude of voltage of the voltage stabilizing chip on each piece emitting electrode plate is got different partial pressure value provides modulated terminal for modulation chip voltage, can be modulated to different frequencies, simplify the process of design greatly.Mainly consider when selecting the frequency modulation chip: surface electromyogram signal is modulated to broadcast band 88MHz～108MHz, and this frequency range is used for biomedical telemetry power, and is generally all very little, and human body is not had injury.Can adopt the frequency modulation chip MAX2606 of Maxim company in the present embodiment, the scope of its input voltage is 2.7V～5.5V, considers to make the distance of emission far away as far as possible, can set input voltage higher, and can select input voltage in the present embodiment is 5V.
Particularly, described signal acquisition module specifically comprises:
Collecting unit S111 is used for the collection surface electromyographic signal;
Reference electrode S112 is used to described collecting unit to gather described surface electromyogram signal reference voltage is provided, so that the voltage of the described surface electromyogram signal that collects is within the common-mode input range of amplifier.
Specifically, collecting unit described in the embodiment of the invention adopts the linear differential electrode of silvery, so that surface electromyogram signal is gathered.Can adopt the differential electrode that is twisted into by two strands of filamentary silvers in the present embodiment, finish the detection of signal, the wherein per share length that is 1mm by 10 diameters is that the filamentary silver of 10mm twists into.Adopt differential electrode can improve signal to noise ratio (S/N ratio), improve the signals collecting quality.
Specifically, described emitter also comprises amplification filtering module S13, be used for that the described surface electromyogram signal that described signal acquisition module collects is carried out amplification filtering and handle, so that the described surface electromyogram signal of described modulate emission module after will handling launched.
In the present embodiment, the amplification filtering module comprises instrument amplifier and filtering circuit, owing to wish to collect high-quality signal, the choice criteria of instrument amplifier is the amplifier of encapsulation of difference input, high input impedance, high cmrr, low current noise and suitable input voltage range (selection of amplifier input voltage sees the power circuit part for details) little (by the microminiaturization decision of electrode) and Gain Adjustable.
In the present embodiment, described amplification filtering module can adopt with low input current noise
High cmrr (〉 100dB), high input impedance (100G Ω) and input voltage range be ± 2.3～± the operational amplifier chip AD8221 of 18V is the amplification filtering function that main amplification filtering circuit is realized faint surperficial surface electromyogram signal, because the effective frequency range of surface electromyogram signal is 20Hz～1000Hz, the cutoff frequency of filtering circuit is roughly 20Hz～1000Hz, can realize with bandpass filter, perhaps low-pass filter and Hi-pass filter be combined and realize.In the present embodiment, " bandpass filter " of the low-pass filter formation of the Hi-pass filter of employing 20Hz and 1000Hz realizes.
In order to improve the signal to noise ratio (S/N ratio) of signal, on the pcb board layout, consider with GND pin (6 pin) line of AD8221 with signal input part (1 pin and 4 pin) around, differential electrode is just surrounded by corresponding common mode terminal like this, the induction of magnetic field electric field will be added on the common mode terminal of differential electrode simultaneously, owing to adopt the operational amplifier of high cmrr, so can suppress noise well.The inductance on the positive supply module and the Cfly of negative power end are easy to be coupled into noise, therefore as far as possible away from input end, can consider to be placed on the low order end of described emitter in the present embodiment.
Layout is from right to left successively in Fig. 1: power module, signal acquisition module, amplification filtering module and frequency modulation transmitter module, from the amplification filtering to frequency modulation, launch, signal by strong to weak, turn left from the right side and to discharge successively.Like this strong and weak signals is separated, thereby can prevent that strong signal place is coupled to the amplifier self-excitation that causes at the weak signal place by distribution parameter, improve the quality of acquired signal.
Shown in Fig. 3, be the schematic diagram of amplification filtering circuit application in emitter of the present invention;
Differential electrode is connected on the positive and negative signal input part of instrument amplifier, and R1 and C1 are connected on the gain adjustment end of AD8221, and the resistance that R1 adjusts as gain on the one hand together constitutes the single order Hi-pass filter with C1 on the other hand.Because will realize the microminiaturization of electrode, the encapsulation of its element should be as far as possible little, consider that at present the maximum value of electric capacity 0805 encapsulation on the market is 10 μ F, and the cutoff frequency of Hi-pass filter is about 20Hz, by being by frequency formula
As can be known, the resistance value of R1 is R1 〉=0.8K Ω, also will consider the voltage range of choice of R1 as gain adjustment resistance simultaneously, guarantee to gain after the amplification, and the surface electromyogram signal that collects can not transship.The R2 of output terminal and C2 constitute low-pass first order filter, if guarantee the low-pass filter that constitutes by R2 and C2 by frequency be
About get final product.
Specifically, described device also comprises power module S14, is used to described emitter to power.
Power module described in the embodiment of the invention one comprises positive supply part and negative supply part, for frequency modulation transmitter module and amplification filtering module provide power supply.Because the present invention is a system with one power, so adopt the electric power system of symmetry, determine that by the input voltage of frequency modulation transmitter module positive voltage is 5V in the present embodiment, then Dui Cheng negative supply voltage is-5V.General little, the capacious battery preferred lithium of volume polymer battery can be selected the big as far as possible lithium polymer battery of the little capacity of volume in the present embodiment, discharges and recharges repeatedly.Selection can be with normal working voltage the lithium polymer battery about 3.7V be converted to 5V and-switching power source chip of 5V, and because Switching Power Supply is operated in the high frequency on off operating mode, need choose ripple is not very big switching power source chip (amplitude of surface electromyogram signal is smaller), in the present embodiment, because the Power Supply Rejection Ratio (PSRR) of instrument amplifier is higher, and the RC wave filter has very high power supply to suppress ability when 20KHz, system is not very high to the ripple rejection ratio requirement of power supply, but the ripple of supply voltage can be sensed responsive input end by distribution parameter, in order to obtain reasonable effect, supply voltage only allows the ripple of tens of mV, this requires not high concerning power supply, for example the ripple of the negative switching power source chip that can select in the present embodiment is 20mV, does not influence the circuit result of use.Can select positive switching power source chip in the present embodiment, with the voltage transitions of lithium polymer battery is 5V, can select charge pump chip, with the voltage transitions of 5V be-5V, the voltage of ± 5V provides generating positive and negative voltage for amplifier AD8221, this shows that amplifier will select both-end voltage and input voltage range to contain ± amplifier of 5V, the input voltage range of AD8221 in the present embodiment is ± 2.3～± 18V, meet the demands.
As shown in Figure 4, be the structural representation at the present embodiment one described multi-channel wireless surface myoelectric signal emitter back side.Reference electrode in the signal acquisition module can guarantee that the voltage range of input signal is within the common-mode input range of amplifier, guarantee the quality of the surface electromyogram signal that collects, described reference electrode can be provided with by mode external or that be arranged on the transmitter module, in the present embodiment reference electrode is made on the PCB of transmitter module, black has partly plated metal, connects GND, as the reference electrode, can reduce line like this, further realize the wireless penetration of surface myoelectric acquisition system.
Embodiment two:
As shown in Figure 5, the invention provides a kind of multi-channel wireless surface myoelectric signal receiving trap, described device comprises:
Receiving demodulation module S21 is used to receive the surface electromyogram signal by after the modulation of wireless transmission method emission, and described surface electromyogram signal is carried out demodulation; Described surface electromyogram signal is a simulating signal;
Micro controller module S22, after being used for the described surface electromyogram signal after the demodulation of described receiving demodulation module carried out analog-to-digital conversion process, and with the described surface electromyogram signal output after the described processing, so that described electromyographic signal is handled.
Specifically, described micro controller module specifically comprises:
Signal processing unit S221, the described surface electromyogram signal that is used for receiving carries out analog-to-digital conversion process;
Signal output unit S222 is used for and will exports by wired or wireless transmission manner through the described surface electromyogram signal after the analog-to-digital conversion process.
With the micro controller module is core, in the present embodiment, can select C8051F320, this chip controls receiving demodulation module receives modulation signal, and receiving demodulation can adopt the receiving demodulation module that is widely used in consumer electronics audio-visual products, household electrical appliance etc. on the market, in the present embodiment, can select the TEA5767 receiver module, this receiver module is integrated highly sensitive low noise amplifier has high stability, and built-in FM demodulator can be saved outside frequency discriminator; Frequency range is 87.5MHz～108MHz, low-power consumption, ultra-small volume.A TEA5767 receiving demodulation module can be by setting PLL value selective reception frequency.When microcontroller C8051F320 control polylith receiving demodulation module, can realize the collection of multi-channel wireless surface myoelectric signal by the modulation signal that different PLL values receives different frequency is set.Certainly when selecting the different modulating frequency, note avoiding identical or extremely close with the frequency in radio station with the different branch pressure voltage of voltage stabilizing chip.
Micro controller module mainly is that the surface electromyogram signal that will receive carries out analog to digital conversion, and exports by wireless transmission or wire transmission mode, for example: communicate by USB interface or bluetooth and PC.Because the clock frequency of its conversion all derives from the clock frequency of microcontroller, so its conversion is synchronous, do not need the stationary problem of considering that additionally signal receives.
When selecting micro controller module, need with reference to following content:
(1) owing to is the acquisition system of multi-channel wireless surface electromyographic electrode, require microcontroller that abundant I/O interface should be arranged, its less important A/D conversion, sampling resolution that need be certain of carrying out, because the amplitude of surface electromyogram signal is less, therefore to adopt 〉=10 ADC.
(2) owing to will communicate with PC, so microcontroller is preferably with USB (universal serial bus) (USB) function control device, and interface makes things convenient for the transmission of data and PC, and can be the receiver module power supply by USB interface.
(3) volume is less.
Consider from above three aspects, in the present embodiment, can select the core of microcontroller C8051F320 as receiver module.It has abundant I/O port, and 17 passages of real 10 200ksps are single-ended/difference ADC, adapt to multichannel wireless surface myoelectricity acquisition system; The general series buss function controller; Volume is less.
Embodiment three:
As shown in Figure 6, the invention provides a kind of multi-channel wireless surface myoelectric signal display device, described device comprises:
Memory module S31 is used to receive and store by wireless or wired transmission mode and sends, through the surface electromyogram signal after the analog to digital conversion;
Display module S32 is used for the described surface electromyogram signal with described memory module preservation, shows by corresponding mode.
Embodiment four:
As shown in Figure 7, the invention provides a kind of multi-channel wireless surface myoelectric signal acquisition system, described system comprises:
As the described a kind of multi-channel wireless surface myoelectric signal emitter S55 of above-mentioned technical scheme;
As the described a kind of multi-channel wireless surface myoelectric signal receiving trap S66 of above-mentioned technical scheme;
And, comprise as the described a kind of multi-channel wireless surface myoelectric signal display device S77 of above-mentioned technical scheme.
In view of the principle of each component devices among the embodiment four such as the technical scheme unanimity described in the embodiment one, two, three, so do not give unnecessary details at this.
According to the embodiment of technical scheme of the present invention, can produce the significant benefit that is better than existing wired Surface Electromyography Signal Acquisition System.For example when the auxiliary gesture input of other position muscle groups need be moved significantly, can not be subjected to the restriction of wired acquisition system, experimenter's action significantly very neatly, and can not gathered environmental limit, can realize the interior mobility of 10m distance; When the ground connection of gathering environment was in bad order, embodiments of the present invention can shield the 50Hz power frequency effectively and disturb, and improved the signal to noise ratio (S/N ratio) of acquired signal.And, the radiating portion and the receiving unit of acquisition system are separated fully, make acquisition electrode microminiaturized more; Adopt the wireless transmit of simulating signal, when receiving, can consider the stationary problem of signal.In this embodiment other benefits and advantage are conspicuous for the those skilled in the art that instructed by the present invention.
The above; only for the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claim.
Claims (10)
1, a kind of multi-channel wireless surface myoelectric signal emitter is characterized in that, comprising:
Signal acquisition module is used for the collection surface electromyographic signal;
The modulate emission module is used for the described surface electromyogram signal that described signal acquisition module collects is modulated, and the described surface electromyogram signal after the modulation is launched by Wireless transmission mode; Described surface electromyogram signal is a simulating signal.
2, emitter according to claim 1 is characterized in that, described modulate emission module specifically comprises:
Frequency modulation unit is used for according to the quality of described surface electromyogram signal and the requirement of receive frequency the frequency of described surface electromyogram signal being modulated;
Voltage regulation unit is used to described frequency modulation unit that burning voltage is provided, so that the frequency stabilization of described surface electromyogram signal frequency modulation emission;
Transmitter unit is used for the described surface electromyogram signal after the described frequency modulation unit modulation is sent with Wireless transmission mode.
3, emitter according to claim 1 is characterized in that, described signal acquisition module specifically comprises:
Collecting unit is used for the collection surface electromyographic signal;
Reference electrode is used to described collecting unit to gather described surface electromyogram signal reference voltage is provided, so that the voltage of the described surface electromyogram signal that collects is within the common-mode input range of amplifier.
4, emitter according to claim 1 is characterized in that, described collecting unit adopts the linear differential electrode of silvery, so that surface electromyogram signal is gathered.
5, emitter according to claim 1, it is characterized in that, described device also comprises the amplification filtering module, be used for that the described surface electromyogram signal that described signal acquisition module collects is carried out amplification filtering and handle, so that the described surface electromyogram signal of described modulate emission module after will handling launched.
6, emitter according to claim 1 is characterized in that, described device also comprises power module, is used to described emitter to power.
7, a kind of multi-channel wireless surface myoelectric signal receiving trap is characterized in that, described device comprises:
The receiving demodulation module is used to receive the surface electromyogram signal by after the modulation of wireless transmission method emission, and described surface electromyogram signal is carried out demodulation; Described surface electromyogram signal is a simulating signal;
Micro controller module, after being used for the described surface electromyogram signal after the demodulation of described receiving demodulation module carried out analog-to-digital conversion process, and with the described surface electromyogram signal output after the described processing, so that described surface electromyogram signal is handled.
8, receiving trap according to claim 7 is characterized in that, described micro controller module specifically comprises:
Signal processing unit, the described surface electromyogram signal that is used for receiving carries out analog-to-digital conversion process;
Signal output unit is used for and will exports by wireless or wired transmission mode through the described surface electromyogram signal after the analog-to-digital conversion process.
9, a kind of multi-channel wireless surface myoelectric signal display device is characterized in that, described device comprises:
Memory module is used to receive and store by wireless or the wire transmission mode transmission, through the surface electromyogram signal after the analog to digital conversion;
Display module is used for the described surface electromyogram signal with described memory module preservation, shows by corresponding mode.
10, a kind of multi-channel wireless surface myoelectric signal acquisition system is characterized in that, described system comprises:
As the described a kind of multi-channel wireless surface myoelectric signal emitter of claim 1-6;
As claim 7,8 described a kind of multi-channel wireless surface myoelectric signal receiving traps;
And, comprise a kind of multi-channel wireless surface myoelectric signal display device as claimed in claim 9.
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| CN101862189A (en) * | 2010-06-13 | 2010-10-20 | 天津大学 | Myoelectricity functional electric stimulation interference filtering method |
| CN102151133A (en) * | 2011-03-04 | 2011-08-17 | 上海理工大学 | Portable respiratory muscle electric collecting device |
| CN102319069A (en) * | 2011-09-15 | 2012-01-18 | 常州市钱璟康复器材有限公司 | Surface myoelectric detection device |
| CN101930285B (en) * | 2009-11-23 | 2012-07-18 | 上海交通大学 | Handwriting recognition method based on surface electromyographic signal |
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| CN110916657A (en) * | 2019-11-05 | 2020-03-27 | 浙江大学 | Wireless charging type multi-channel wireless surface electromyographic signal acquisition system |
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