CN102961132B - Wireless surface electromyographic signal pickup device and method and front-end compression method - Google Patents
Wireless surface electromyographic signal pickup device and method and front-end compression method Download PDFInfo
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Abstract
The invention discloses a wireless surface electromyographic signal pickup device and method and a front-end compression method. The device specifically comprises a wireless receiving terminal and a plurality of active wireless surface sensors which are in wireless communication with the wireless receiving terminal, wherein the active wireless surface sensors are used for high-fidelity pickup of surface electromyographic signals, and quantifying and transmitting the surface electromyographic signals, and the wireless receiving terminal is used for receiving the surface electromyographic signals picked up by the active wireless surface sensor and sending the signals to terminal equipment. The device solves the problem that the traditional wireless surface electromyographic signal acquisition device has a large amount of data, and the differential absolute value moving average algorithm is used by the front ends of the active wireless sensors to effectively compress the wireless transmission data amount, so that the support for the extension of channel number acquired by the active sensors is provided, and simultaneously, the time support for retransmission of lost packets is provided, and thus the ability of wireless peripheral object interference resistance and electromagnetic interference resistance is improved.
Description
Technical field
The present invention relates to physiological signal pickup technology field, in particular, relate to a kind of wireless surface myoelectric signal pick device, method and front end compression method.
Background technology
Physiological signal interactive device gathers the physiological signals such as electromyographic signal, brain signal or electroneurographic signal, by identifying the characteristic information of this kind of signal, judge the intention of human brain, wherein, electromyographic signal, as a kind of electro-physiological signals produced with muscular movement, is widely used in the fields such as clinical human body medical diagnosis on disease, sports medical science and rehabilitation engineering at present.Compared with traditional implanted electromyographic signal, surface electromyogram signal obtained at skin surface conductive electrode docile, its characteristic information can directly reflect that human action is intended to, and has the substantivity of sensed activation, therefore can combine with mechanical arm and form myoelectric limb.In addition, the non-invasive characteristic of surface electromyogram signal, also by as man-machine interface, is applied to the various aspects such as interactive entertainment amusement, sign language automatic translation, electrical equipment control, operational commanding.
Surface electromyogram signal superposes by the single muscle fiber action potential pulse that muscle fiber is formed the motor potential formed over time and space, and the feature of its signal is superposed by the high-frequency impulse in multiple audiorange to be formed.Surface myoelectric collecting part is divided into wired surface myoelectric and wireless surface myoelectricity according to the feature of communication.Because wired surface myoelectric is to the dependence of cable, affect the wearable of surface myoelectric and portable application to a great extent, in order to solve its wearable and portable application, wireless surface myoelectricity obtains development to a certain degree.At present, what multiple wireless surface myoelectricity adopted is topological structure, the tele-release of each sensor integrated meter facial muscle is large, the function of analog digital conversion and wireless transmit, the whole myoelectricity data gathered are sent to the receptor of specifying by custom protocol, this full initial data surface myoelectric acquisition system is mainly used for nerve and muscle damage and rehabilitation research, its fatal shortcoming is that the data volume of full original data transmissions is very large, limit acquisition channel expansion, also limit wireless transmission distance simultaneously, and the anti-electromagnetic interference capability of system.
Therefore, a kind of wireless surface myoelectric signal pick device, method and front end compression method are provided, effectively reduce wirelessly transmitting data amount, to expand acquisition channel and to expand wireless transmission distance, the anti-electromagnetic interference capability of raising system is those skilled in the art's problem demanding prompt solutions.
Summary of the invention
In view of this, the invention provides a kind of wireless surface myoelectric signal pick device, method and front end compression method, to overcome in prior art because full original data transmissions data volume is very large, the expansion of restriction acquisition channel, also limit wireless transmission distance simultaneously, and the problem of the anti-electromagnetic interference capability of system.
For achieving the above object, the invention provides following technical scheme:
A kind of wireless surface myoelectric signal pick device, for the front end compression wireless surface myoelectric signal pickup of action recognition, this device comprises: radio receiving terminal and the multiple active radio surface probes be connected with described radio receiving terminal radio communication, wherein,
Described active radio surface probe effects on surface electromyographic signal carries out the pickup of high-fidelity, and is carried out quantizing and transmitting by described surface electromyogram signal;
Described radio receiving terminal receives the described surface electromyogram signal of described active radio surface probe pickup, and is sent to terminal unit.
Wherein, described active radio surface probe is specifically made up of non-polarized high-purity filamentary silver, high pass instrumentation amplifier, bandpass amplifier, built-in mould number converter low-power scm, the first radio frequency transceiving module, battery module and battery management module,
Described non-polarized high-purity filamentary silver obtains surface electromyogram signal by being adjacent to skin, the high gain amplifier formed through described high pass instrumentation amplifier and described bandpass amplifier carries out the high impedance coupling of described surface electromyogram signal, small signals amplification and the pseudo-trace countermeasure Processing for removing that moves, obtain the analogue signal that amplitude is relatively high, described built-in mould number converter low-power scm converts described analogue signal to digital signal and buffer memory, and compression process is carried out to described digital signal, control described first radio frequency transceiving module and the described digital signal after compression is sent to described radio receiving terminal.
Wherein, described radio receiving terminal comprises: the second radio frequency transceiving module, and described radio receiving terminal receives the described digital signal of described active radio surface probe transmission by described second radio frequency transceiving module.
Preferably, described non-polarized high-purity filamentary silver is cylindrical, arranges according to parallel three pole pole technologies.
Preferably, the spacing between three pole bars of described non-polarized high-purity filamentary silver is 5cm-15cm, and wherein any one pole bar all can be used as ground electrode, and other two pole bars are connected with the positive inverting input of described high pass instrumentation amplifier.
On the basis of above-mentioned disclosed a kind of wireless surface myoelectric signal pick device, the invention also discloses a kind of wireless surface myoelectric signal pick-up method, for the front end compression wireless surface myoelectric signal pickup of action recognition, the method comprises:
A1, active radio surface probe obtain surface electromyogram signal by the non-polarized high-purity filamentary silver being adjacent to skin;
The high pass instrumentation amplifier of A2, described active radio surface probe and bandpass amplifier form high gain amplifier and carry out the high impedance coupling of described surface electromyogram signal, small signals amplification and the pseudo-trace countermeasure Processing for removing that moves, and obtain the analogue signal that amplitude is relatively high;
The built-in mould number converter low-power scm of A3, described active radio surface probe converts described analogue signal to digital signal and buffer memory, and compression process is carried out to described digital signal, control described first radio frequency transceiving module and the described digital signal after compression is sent to described radio receiving terminal;
A4, described radio receiving terminal receive the described surface electromyogram signal of described active radio surface probe pickup, and are sent to terminal unit.
The invention also discloses a kind of front end compression method, it is characterized in that, for the front end compression wireless surface myoelectric signal pickup of action recognition, the method comprises:
S1, the numerical value after signal quantization is carried out differential process;
S2, the data obtained after described differential process to be taken absolute value, and cumulative summation is carried out to described absolute value;
S3, the cumulative summing value that described cumulative summation obtains is fixed the average of window or shifting processing;
S4, described value structure that is average or shifting processing is carried out buffer memory.
Preferably, the described differential process concrete grammar in described step S1 is:
Current quantisation numerical value is deducted a upper quantized values, preserve current quantisation numerical value, for lower subdifferential process is prepared simultaneously.
Preferably, described step S3 is specially:
Count quantizing number of times or differential process or cumulative number;
When counting reaches stationary window data volume, described cumulative summing value is processed divided by stationary window size of data;
When stationary window data volume meets the n power of 2, on average adopt shifting processing.
Known via above-mentioned technical scheme, compared with prior art, the invention discloses a kind of wireless surface myoelectric signal pick device, method and front end compression method, this device specifically comprises: radio receiving terminal and the multiple active radio surface probes be connected with described radio receiving terminal radio communication, wherein, described active radio surface probe effects on surface electromyographic signal carries out the pickup of high-fidelity, and is carried out quantizing and transmitting by described surface electromyogram signal; Described radio receiving terminal receives the described surface electromyogram signal of described active radio surface probe pickup, and is sent to terminal unit.This device overcomes the large problem of the data volume of conventional wireless surface myoelectric harvester, differential absolute value rolling average compression algorithm is carried out by active radio sensor front end, effectively have compressed wirelessly transmitting data amount, for the port number expansion of active sensor collection provides support, support for packet loss retransmits the time that provides simultaneously, improve the ability of the interference of anti-wireless peripheral object and electromagnetic interference.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments of the invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to the accompanying drawing provided.
The structural representation of Fig. 1 a kind of wireless surface myoelectric signal pick device disclosed in the embodiment of the present invention;
The structural representation of active radio surface probe in Fig. 2 a kind of wireless surface myoelectric signal pick device disclosed in the embodiment of the present invention;
Fig. 3 is the geometrized structure graph of non-polarized high-purity silver filament bar;
The flow chart of Fig. 4 a kind of wireless surface myoelectric signal pick-up method disclosed in the embodiment of the present invention;
The flow chart of Fig. 5 a kind of front end compression method disclosed in the embodiment of the present invention;
The characteristic effect figure of Fig. 6 a kind of front end compression method disclosed in the embodiment of the present invention.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
The invention discloses a kind of wireless surface myoelectric signal pick device, method and front end compression method, this device specifically comprises: radio receiving terminal and the multiple active radio surface probes be connected with radio receiving terminal radio communication, wherein, active radio surface probe effects on surface electromyographic signal carries out the pickup of high-fidelity, and is carried out quantizing and transmitting by surface electromyogram signal; Radio receiving terminal receives the surface electromyogram signal of active radio surface probe pickup, and is sent to terminal unit.This device overcomes the large problem of the data volume of conventional wireless surface myoelectric harvester, differential absolute value rolling average compression algorithm is carried out by active radio sensor front end, effectively have compressed wirelessly transmitting data amount, for the port number expansion of active sensor collection provides support, support for packet loss retransmits the time that provides simultaneously, improve the ability of the interference of anti-wireless peripheral object and electromagnetic interference.This front end compression method, not only achieves data compression, completes surface electromyogram signal feature extraction tasks simultaneously, the task of feature extraction is given multiple active radio sensor, decreases the operand of action recognition processor.
Referring to accompanying drawing 1, is the structural representation of a kind of wireless surface myoelectric signal pick device disclosed by the invention.The invention discloses a kind of wireless surface myoelectric signal pick device, for the front end compression wireless surface myoelectric signal pickup of action recognition, this device comprises: radio receiving terminal 101 and the multiple active radio surface probes 102 be connected with described radio receiving terminal 101 radio communication, wherein, described active radio surface probe 102 effects on surface electromyographic signal carries out the pickup of high-fidelity, and is carried out quantizing and transmitting by described surface electromyogram signal; Described radio receiving terminal 101 receives the described surface electromyogram signal of described active radio surface probe 102 pickup, and is sent to terminal unit.
The invention discloses a kind of wireless surface myoelectric signal pick device, this device specifically comprises: radio receiving terminal and the multiple active radio surface probes be connected with radio receiving terminal radio communication, wherein, active radio surface probe effects on surface electromyographic signal carries out the pickup of high-fidelity, and is carried out quantizing and transmitting by surface electromyogram signal; Radio receiving terminal receives the surface electromyogram signal of active radio surface probe pickup, and is sent to terminal unit.This device overcomes the large problem of the data volume of conventional wireless surface myoelectric harvester, differential absolute value rolling average compression algorithm is carried out by active radio sensor front end, effectively have compressed wirelessly transmitting data amount, for the port number expansion of active sensor collection provides support, support for packet loss retransmits the time that provides simultaneously, improve the ability of the interference of anti-wireless peripheral object and electromagnetic interference.
Refer to accompanying drawing 2, the structural representation of active radio surface probe in a kind of wireless surface myoelectric signal pick device disclosed in the embodiment of the present invention.The structure of concrete described active radio surface probe comprises: non-polarized high-purity filamentary silver, high pass instrumentation amplifier, bandpass amplifier, built-in mould number converter low-power scm, radio frequency transceiving module, lithium battery and power management module are formed, and the annexation of modules refers to accompanying drawing 2.
The workflow of each active sensor is that non-polarized high-purity silver silk obtains surface electromyogram signal by being close to skin, then the high gain amplifier through being made up of high pass instrumentation amplifier and bandpass amplifier carries out skin high impedance coupling, small signals amplification, and obtain the relatively high analogue signal of amplitude after the process such as pseudo-trace countermeasure elimination of moving, complete analogue signal by built-in mould number converter low-power scm again and convert digital signal to and buffer memory, single-chip microcomputer carries out compression process to the digital signal after conversion, last Single-chip Controlling radio frequency transceiving module sends the digital signal after compression.The compression of single-chip microcomputer is the process of surface electromyogram signal feature extraction.
Multiple active radio sensor forms surface electromyogram signal pickup array, and each active radio sensor needs the task of carrying out to be pickup, amplifies, quantizes and compression.Then radio receiving terminal is sent to by custom protocol wireless network or bluetooth, wireless terminal utilizes the packed data with surface electromyogram signal characteristic information to control domestic electric appliances controller, PC or mechanical hand, forms artificial limb or the body sense controller of the control of belt surface electromyographic signal.
The bulk supply of active radio sensor is provided by lithium battery, then carries out voltage stabilizing and under-voltage management through power management module.The digital circuit that the object of voltage stabilizing is analog circuit for amplifier is formed, single-chip microcomputer is core and the radio circuit that 2.4G wireless chip is formed provide the power supply of low noise, comprise positive and negative regulated power supply, wherein, high pass instrumentation amplifier adopts positive negative bipolar Power supply, and bandpass amplifier and single-chip microcomputer and radio transceiver part are powered by unipolarity positive supply.In addition, near the acp chip power pin of each functional module, all place a decoupling capacitor, avoid its power supply crosstalk.
The instrumentation amplifier that high pass instrumentation amplifier adopts three amplifiers integrated, the embodiment of its high pass is the gain control end adopting the mode of resistance and capacitances in series to access three amplifier instrumentation amplifiers.Bandpass amplifier is the Butterworth band pass filter circuit adopting single amplifier single power supply.Two amplifiers band filter with second order high pass and single order low pass in series, high pass cut off frequency is set to 10Hz, and low-pass cut-off frequencies is set to 500Hz.The high-pass filtering characteristic that amplifier embodies can suppress to move the noise jamming that pseudo-track causes effectively, and the characteristic value signal for subsequent data compression provides the analogue signal of high s/n ratio.
The single-chip microcomputer of active radio sensor adopts the built-in AD type of low-power consumption, pays the utmost attention to MSP430 series and STM320 series.Single-chip microcomputer by spi bus or self-defined bus and radio frequency chip communication, the snakelike layout of antenna employing PCB of radio frequency chip.Radio frequency transceiving module with other functional modules on same circuit board, also can become plate separately, by flexible winding displacement and microcontroller communication.
The pickoff electrode of active radio sensor adopts cylindrical non-polarized high-purity filamentary silver, arranges according to parallel three pole pole technologies.As shown in Figure 3, pole bar 1,2,3 is arranged in parallel, the spacing between them at 5cm-15cm, prioritizing selection 10cm.Any one pole bar in three pole bars all can be used as ground electrode, and two other electrode is directly connected with the positive inverting input of the instrumentation amplifier of accompanying drawing 2.
The invention discloses a kind of wireless surface myoelectric signal pick device, this device specifically comprises: radio receiving terminal and the multiple active radio surface probes be connected with radio receiving terminal radio communication, wherein, active radio surface probe effects on surface electromyographic signal carries out the pickup of high-fidelity, and is carried out quantizing and transmitting by surface electromyogram signal; Radio receiving terminal receives the surface electromyogram signal of active radio surface probe pickup, and is sent to terminal unit.This device overcomes the large problem of the data volume of conventional wireless surface myoelectric harvester, differential absolute value rolling average compression algorithm is carried out by active radio sensor front end, effectively have compressed wirelessly transmitting data amount, for the port number expansion of active sensor collection provides support, support for packet loss retransmits the time that provides simultaneously, improve the ability of the interference of anti-wireless peripheral object and electromagnetic interference.
On the basis of embodiment disclosed in the invention described above, refer to accompanying drawing 4, a kind of flow chart of wireless surface myoelectric signal pick-up method disclosed in the embodiment of the present invention.The embodiment of the invention also discloses a kind of wireless surface myoelectric signal pick-up method, for the front end compression wireless surface myoelectric signal pickup of action recognition, the method concrete steps comprise:
Steps A 1, active radio surface probe obtain surface electromyogram signal by the non-polarized high-purity filamentary silver being adjacent to skin.
The high pass instrumentation amplifier of steps A 2, active radio surface probe and bandpass amplifier form high gain amplifier and carry out the high impedance coupling of surface electromyogram signal, small signals amplification and the pseudo-trace countermeasure Processing for removing that moves, and obtain the analogue signal that amplitude is relatively high.
The built-in mould number converter low-power scm of steps A 3, active radio surface probe converts analogue signal to digital signal and buffer memory, and compression process is carried out to digital signal, control described first radio frequency transceiving module and the digital signal after compression is sent to radio receiving terminal.
Steps A 4, radio receiving terminal receive the surface electromyogram signal of active radio surface probe pickup, and are sent to terminal unit.
The invention discloses a kind of wireless surface myoelectric signal pick-up method, the method overcome the problem that the data volume of conventional wireless surface myoelectric harvester is large, differential absolute value rolling average compression algorithm is carried out by active radio sensor front end, effectively have compressed wirelessly transmitting data amount, for the port number expansion of active sensor collection provides support, support for packet loss retransmits the time that provides simultaneously, improve the ability of the interference of anti-wireless peripheral object and electromagnetic interference.
For method disclosed in embodiment, because it is corresponding with device disclosed in embodiment, so description is fairly simple, relevant part illustrates see device section.
On the basis of above-mentioned disclosed a kind of wireless surface myoelectric signal pick device and method, refer to accompanying drawing 5, the flow chart of a kind of front end compression method disclosed in the embodiment of the present invention.The invention also discloses a kind of front end compression method, for the front end compression wireless surface myoelectric signal pickup of action recognition, after active radio sensor starts collection, AD conversion analogue signal obtains the numerical value quantized, single-chip microcomputer carries out data compression, and the method concrete steps comprise:
Step S1, the numerical value after signal quantization is carried out differential process.
Current quantisation numerical value is deducted a upper quantized values, preserve current quantisation numerical value, for lower subdifferential process is prepared simultaneously.
Step S2, the data obtained after described differential process to be taken absolute value, and cumulative summation is carried out to described absolute value.
Step S3, the cumulative summing value that described cumulative summation obtains is fixed the average of window or shifting processing.
Count quantizing number of times or differential process or cumulative number;
When counting reaches stationary window data volume, described cumulative summing value is processed divided by stationary window size of data;
When stationary window data volume meets the n power of 2, on average adopt shifting processing.
Step S4, described value structure that is average or shifting processing is carried out buffer memory.
The compression ratio of this surface electromyogram signal Data Frontend compression method is fixed window size, and top-priority window size is 128.After each active radio sensor of wireless front end compressive surfaces electromyographic signal pick device carries out data compression according to the method, then carry out packed data time sharing transmissions.This method not only achieves data compression, completes surface electromyogram signal feature extraction tasks simultaneously, and as shown in Figure 6, compression ratio is 128 to its characteristic effect extracted, and the line of black is the later signal of compression, Lycoperdon polymorphum Vitt be primary signal.
Disclosed in the embodiment of the present invention, a kind of front end compression method, not only achieves data compression, completes surface electromyogram signal feature extraction tasks simultaneously, the task of feature extraction is given multiple active radio sensor, decreases the operand of action recognition processor.
In sum: the invention discloses a kind of wireless surface myoelectric signal pick device, method and front end compression method, this device specifically comprises: radio receiving terminal and the multiple active radio surface probes be connected with radio receiving terminal radio communication, wherein, active radio surface probe effects on surface electromyographic signal carries out the pickup of high-fidelity, and is carried out quantizing and transmitting by surface electromyogram signal; Radio receiving terminal receives the surface electromyogram signal of active radio surface probe pickup, and is sent to terminal unit.This device overcomes the large problem of the data volume of conventional wireless surface myoelectric harvester, differential absolute value rolling average compression algorithm is carried out by active radio sensor front end, effectively have compressed wirelessly transmitting data amount, for the port number expansion of active sensor collection provides support, support for packet loss retransmits the time that provides simultaneously, improve the ability of the interference of anti-wireless peripheral object and electromagnetic interference.This front end compression method, not only achieves data compression, completes surface electromyogram signal feature extraction tasks simultaneously, the task of feature extraction is given multiple active radio sensor, decreases the operand of action recognition processor.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the present invention.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein can without departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (6)
1. a wireless surface myoelectric signal pick device, it is characterized in that, for the front end compression wireless surface myoelectric signal pickup of action recognition, this device comprises: radio receiving terminal and the multiple active radio surface probes be connected with described radio receiving terminal radio communication, wherein
Described active radio surface probe effects on surface electromyographic signal carries out the pickup of high-fidelity, and is carried out quantizing and transmitting by described surface electromyogram signal;
Described active radio surface probe is specifically made up of non-polarized high-purity filamentary silver, high pass instrumentation amplifier, bandpass amplifier, built-in mould number converter low-power scm, the first radio frequency transceiving module, battery module and battery management module,
Described non-polarized high-purity filamentary silver obtains surface electromyogram signal by being adjacent to skin, the high gain amplifier formed through described high pass instrumentation amplifier and described bandpass amplifier carries out the high impedance coupling of described surface electromyogram signal, small signals amplification and the pseudo-trace countermeasure Processing for removing that moves, obtain analogue signal, described built-in mould number converter low-power scm converts described analogue signal to digital signal and buffer memory, and compression process is carried out to described digital signal, control described first radio frequency transceiving module and the described digital signal after compression is sent to described radio receiving terminal,
When described built-in mould number converter low-power scm carries out data compression, numerical value after signal quantization is carried out differential process, the data obtained after described differential process are taken absolute value, and cumulative summation is carried out to described absolute value, the cumulative summing value that described cumulative summation obtains is fixed the average of window or shifting processing, finally described value structure that is average or shifting processing is carried out buffer memory;
Wherein the cumulative summing value that described cumulative summation obtains is fixed the average of window or shifting processing is specially: quantification number of times or differential process or cumulative number are counted, when counting reaches stationary window data volume, described cumulative summing value is processed divided by stationary window size of data, when stationary window data volume meets the n power of 2, on average adopt shifting processing;
Described radio receiving terminal receives the described surface electromyogram signal of described active radio surface probe pickup, and is sent to terminal unit.
2. device according to claim 1, it is characterized in that, described radio receiving terminal comprises: the second radio frequency transceiving module, and described radio receiving terminal receives the described digital signal of described active radio surface probe transmission by described second radio frequency transceiving module.
3. device according to claim 1, is characterized in that, described non-polarized high-purity filamentary silver is cylindrical, arranges according to parallel three pole pole technologies.
4. device according to claim 3, it is characterized in that, spacing between three pole bars of described non-polarized high-purity filamentary silver is 5cm-15cm, and wherein any one pole bar all can be used as ground electrode, and other two pole bars are connected with the positive inverting input of described high pass instrumentation amplifier.
5. a front end compression method, is characterized in that, for the front end compression wireless surface myoelectric signal pickup of action recognition, the method comprises:
S1, the numerical value after signal quantization is carried out differential process;
S2, the data obtained after described differential process to be taken absolute value, and cumulative summation is carried out to described absolute value;
S3, the cumulative summing value that described cumulative summation obtains is fixed the average of window or shifting processing;
Be specially:
Count quantizing number of times or differential process or cumulative number;
When counting reaches stationary window data volume, described cumulative summing value is processed divided by stationary window size of data;
When stationary window data volume meets the n power of 2, on average adopt shifting processing;
S4, described value structure that is average or shifting processing is carried out buffer memory.
6. method according to claim 5, is characterized in that, the described differential process concrete grammar in described step S1 is:
Current quantisation numerical value is deducted a upper quantized values, preserve current quantisation numerical value, for lower subdifferential process is prepared simultaneously.
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| CN106137188A (en) * | 2015-04-10 | 2016-11-23 | 青岛智拓智能科技有限公司 | A kind of electromyographic signal transmission method and system |
| EP3120764A1 (en) | 2015-07-23 | 2017-01-25 | Universitat Politècnica De Catalunya | Portable device and method for measuring electromyographic signals of an user |
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| 表面肌电信号检测和处理中若干关键技术研究;赵章琰;《信息科技辑》;20101015;正文第9页第2-3段、第11页第3段、第20页第2段、第35页第3-4段、第58页第3段、第59页倒数第1段至第60页第1-2段、第80页倒数第1段至第81页第1段以及附图7.4 * |
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