CN103315721A - Human physiology signal acquisition and processing method and system based on MIC interface - Google Patents
Human physiology signal acquisition and processing method and system based on MIC interface Download PDFInfo
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- CN103315721A CN103315721A CN2013101947714A CN201310194771A CN103315721A CN 103315721 A CN103315721 A CN 103315721A CN 2013101947714 A CN2013101947714 A CN 2013101947714A CN 201310194771 A CN201310194771 A CN 201310194771A CN 103315721 A CN103315721 A CN 103315721A
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Abstract
The invention discloses a human physiology signal acquisition and processing method. The human physiology signal acquisition and processing method comprises the steps of performing amplification and regulation of acquired human physiology signals, performing voice frequency amplitude modulation to all of human physiology signals, performing superposition of modulated human physiology signals to form a composite voice frequency signal, sampling the composite voice frequency signal input into an MIC port and converting the composite voice frequency signal into a digital signal, utilizing a digital band-pass filter group to perform band-pass filtering of the digital signal and decomposing composite signals on a frequency band to be modulating signals of the human physiology signals, performing envelope detection reduction of decomposed modulating signals to obtain low-frequency human physiology signals and finishing acquisition, analysis and processing. The invention further discloses a corresponding human physiology signal acquisition and processing system. By means of the human physiology signal acquisition and processing method and system, multiple human physiology signals are modulated in a frequency division mode and then are composited to form a voice frequency signal, and accordingly universalized processing can be achieved. In addition, a built-in sound card takes the place of a data acquisition card, so that the cost is compressed, architecture is simplified, and the method and system is convenient to achieve.
Description
Technical field
The invention belongs to the signal collection and analysis process field, be specifically related to a kind of acquiring and processing method and system of physiology signal.
Background technology
People are to the physiology signal growing interest such as pulse, blood pressure, electrocardio of oneself, in order to reduce medical treatment cost, make large-scale Medical Instruments miniaturization, domestic, portability, make things convenient for kinsfolk's autognostic and monitoring, many Medical Instruments all provide mobile home version one for family's demand, the physiology signal oneself detecting instrument that large quantities of family health cares such as electric sphygmomanometer, portable electrocardiograph, oxygen saturation measurement instrument are used occurred.
These domestic Medical Instruments generally are comprised of physiology signal measuring transducer and display analysis main frame two parts.Be subjected to the low price of Household instrument and cheaply restriction, the display analysis host machine part is generally with single-chip microcomputer+little liquid crystal board realization, and the demonstration of instrument, analysis, writing function are limited.At present, for demonstration, analysis, the writing function that strengthens instrument, the domestic Medical Instruments begins to replace single-chip microcomputer as the information processing core with mobile phone or computer generation, shows the physiological signal that gathers, and the diagnosis advisory opinion is provided.One of them key link is that the physiological signal collection is transferred to mobile phone or computer.
Computer, mobile phone can not directly receive the analogue signal of human body physiological signal measurements sensor, general way is to be equipped with a data capture card to them, be digital signal with the physiology signal collection of analog quantity form, then transfer data to computer or mobile phone by pci bus or usb bus.
Can realize that smart mobile phone or home computer as the demonstration of information processing core to physiological signal, exist certain defect and room for improvement although do like this: the first, supporting capture card has increased product cost, can compress; The second, the specialized inconvenient operation general population of capture card uses, and probe is should be able to plug and play best; The 3rd, from human body to the signal condition module again to capture card again to mobile phone or computer, whole scheme connection is numerous and diverse; The 4th, existing equipment, no matter be with single-chip microcomputer or with mobile phone or computer as the processes and displays core, each road physiological signal independently can only be gathered transmission, line efficiency is low.
Summary of the invention
Above defective and Improvement requirement for prior art, the invention provides a kind of collection and processing method and system of physiology signal, its purpose is by multichannel physiology signal frequency modulation is synthesized one road MIC signal, be input to portable set by the MIC interface and carry out the acquisition and processing analysis, solve thus present physiology signal collection and analytical equipment complex circuit, can't multichannel gather simultaneously and use the problem of carrying inconvenience.
According to one aspect of the present invention, a kind of collection and processing method of physiology signal is provided, its equipment that the multichannel physiology signal input of sensor acquisition can be had the MIC interface carries out Treatment Analysis, it is characterized in that, and the method comprises:
S1: every road multichannel physiology signal that will gather amplifies conditioning;
S2: each passerby's body physiological signal is carried out the audio frequency which amplitude modulation, and wherein the frequency of the modulated carrier of every road signal is different;
S3: each the passerby's body physiological signal after will modulating is superposed to one road composite audio signal, and itself and MIC interface are coordinated, thereby being input in the equipment by the MIC interface;
S4: by equipment this composite signal of inputting from the MIC mouth is sampled, and be converted to digital signal;
S5: utilize the digital band-pass filter group that described digital signal is carried out bandpass filtering, composite audio signal is decomposed into from the frequency band the modulation signal of each corresponding passerby's body physiological signal;
S6: each the road modulation signal after decomposing is carried out the envelope detection reduction, obtain the physiology signal of each road low frequency, can finish gathering and analyzing and processing through the analyzing and processing of described equipment.
As present invention further optimization, the mid frequency of each wave filter is corresponding one by one with the frequency of described modulated carrier respectively in the described digital band-pass filter group.
As present invention further optimization, the reduction of the physiology signal of described each road low frequency realizes by the digital envelope detection mode.
As present invention further optimization, described to sampling by the sound card realization of described equipment from this composite signal of MIC mouth input.
As present invention further optimization, described equipment can be smart mobile phone, computer or panel computer.
As present invention further optimization, the wave filter in the described band-pass filter group can be the FIR wave filter.
According to another aspect of the present invention, a kind of collection and processing system of physiology signal is provided, be used for the multichannel physiology signal of sensor acquisition is received to carry out Treatment Analysis by the MIC interface, it is characterized in that, this system comprises:
Amplify conditioning unit, the multichannel physiology signal that is used for gathering amplifies respectively and nurses one's health;
Modulating unit is used for each passerby's body physiological signal is carried out the audio frequency which amplitude modulation, and wherein, the frequency of the modulated carrier of every road signal is different;
Recombiner unit, each the passerby's body physiological signal after being used for modulating is superposed to one road composite audio signal, and this composite audio signal and MIC interface are coordinated, thereby transmitting by the MIC interface;
Sampling unit, it is used for the composite audio signal that transmits from the MIC interface is sampled, and is converted to digital signal;
The filtering resolving cell, it is by utilizing the digital band-pass filter group that described digital signal is carried out bandpass filtering, described composite audio signal is decomposed into from the frequency band the modulation signal of each corresponding passerby's body physiological signal;
The demodulation analysis unit, it is used for each the road modulation signal after decomposing is carried out the envelope detection reduction, obtains each passerby's body physiological signal carrying out analyzing and processing, thereby finishes acquisition and processing.
As present invention further optimization, the mid frequency of each wave filter is corresponding one by one with the frequency of described modulated carrier respectively in the described digital band-pass filter group.
As present invention further optimization, the wave filter in the described band-pass filter group can be the FIR wave filter.
Among the present invention, can be with electrocardiosignal for example, pulse signal, the multichannel physiology signal frequency modulation such as oxygen saturation signal synthesize the signal of one road MIC standard, then the MIC mouth by mobile phone or computer carries out the signal transmission, the method that data acquisition and multiple signals extract and analyze, its purpose is that multi-channal physiological is complex as one road signal to be transmitted, frequency division multiplexing, improve line efficiency, carry sound card with mobile phone or computer simultaneously and replace special data collecting card to carry out data acquisition, solve thus the technical problem that must be equipped with extra data collecting card in physiological signal is converted to digital quantity by analog quantity the process.
Among the present invention, computer, interior of mobile phone band a sound card (data acquisition unit), can by mike to acoustical signal measure, analysis, record.For this reason, imagination is designed to form with the mike compatibility with the physiology signal measuring transducer, so just can pass through the MIC interface, physiology signal is collected in computer, the mobile phone analyze.
Owing to the sound card of computer, mobile phone designs for collected sound signal, its effective frequency passband is 20 hertz～20K hertz.And the signal frequencies such as pulse, electrocardio, hear sounds are very low, only have several hertz or tens hertz, and signal attenuation is very large during by the sound card modulate circuit.For this reason, the present invention adopts analogue signal which amplitude modulation technology, the physiology signal of low frequency is modulated to the audio signal that sound card can detect, then carry out signals collecting, last digital demodulation of carrying out amplitude modulated signal in computer, mobile phone with software obtains required low frequency physiology signal.
The present invention is modulated at different frequency bands by frequency multiplexing technique with signals such as pulse, electrocardio, hear sounds, with one road MIC interface, transmits simultaneously the multichannel physiology signal.For example, once realize three electrocardiosignaies measurements of leading.
Among the present invention, first each passerby's body physiological signal is amplified conditioning, then, use such as the carrier signal of the different frequency in the audiorange such as 1500 hertz, 3000 hertz, 6000 hertz each passerby's body physiological signal is carried out which amplitude modulation.Then, the multichannel physiology signal is superposed to the composite human body physiological signal of one road MIC electric interfaces standard, to be used for that the composite human body physiological signal is input to computer or smart mobile phone by the microphone jack of computer or smart mobile phone.
When physiology signal, a kind of digital demodulation and extracting mode with each passerby's body physiological signal in the composite human body physiological signal of digital band pass filtering and digital envelope detection realization proposed then.Its step is as follows:
At first, by sound card the composite human body physiological signal of MIC mouth input is sampled, and be converted to digital signal.Secondly, with one group of bandwidth be 200 hertz, mid frequency one to one, for example 1500 hertz, 3000 hertz, 6000 hertz digital band-pass filter group is carried out bandpass filtering to digital signal, and the modulation signal that will be aliasing in each passerby's body physiological signal together from the frequency band decomposes and comes.
Then, the modulation signal of each passerby's body physiological signal carried out the digital envelope detection that realizes with Hilbert transform, reduction obtains the physiology signal of each road low frequency.
Among the present invention, take full advantage of the soft and hardware resource of computer, mobile phone, only need to design the physiology signal sensor by the MIC standard, just can directly they be linked in computer, the mobile phone and analyze, sound card with mobile phone or built-in computer replaces external special data collecting card, compress cost, simplified framework, and convenient the realization.Simultaneously, adopt amplitude-modulated transmission method, can be with the modulation of multichannel physiology signal frequency division, resynthesis one road signal, a holding wire frequency division multiplexing, efficient is high.
Description of drawings
Fig. 1 is the collection of the physiology signal in the embodiment of the invention and the schematic flow sheet of processing method.
Fig. 2 is with the compound FB(flow block) of multichannel physiology signal that is input into the MIC interface in the embodiment of the invention.
Fig. 3 is the demodulation decomposition process schematic diagram of multichannel physiology signal compound in the embodiment of the invention.
Fig. 4 is the conditioning FB(flow block) that is used for the multichannel physiology signal of input MIC interface in the embodiment of the invention.
Fig. 5 is the electrocardiosignal Modulation and Amplitude Modulation schematic diagram that is used for input MIC interface in the embodiment of the invention, and wherein (a) is the Modulation and Amplitude Modulation principle schematic, (b) is the signal generating circuit block diagram, (c) is the Modulation and Amplitude Modulation circuit block diagram.
Fig. 6 is the compound schematic diagram of electrocardiosignal that is used for input MIC interface in the embodiment of the invention, and wherein (a) is schematic diagram, (b) is the circuit block diagram of specific implementation.
The specific embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, is not intended to limit the present invention.
Collection and the processing method of the physiology signal of the present embodiment specifically comprise the steps:
(1) each passerby's body physiological signal is amplified conditioning,
(2) use such as the carrier signal of the different frequency in the audiorange such as 1500 hertz, 3000 hertz, 6000 hertz each passerby's body physiological signal is carried out which amplitude modulation.
(3) the multichannel physiology signal is superposed to the composite human body physiological signal of one road MIC electric interfaces standard, to be used for that the composite human body physiological signal is input to computer or smart mobile phone by the microphone jack of computer or smart mobile phone.
Behind the input equipment, by digital demodulation and the extracting mode of each passerby's body physiological signal in the composite human body physiological signal of realizing with digital band pass filtering and digital envelope detection.Its step is as follows:
(4) by sound card the composite human body physiological signal of MIC mouth input is sampled, and be converted to digital signal.
(5) with one group of bandwidth for example be 200 hertz, mid frequency one to one, for example 1500 hertz, 3000 hertz, 6000 hertz digital band-pass filter group is carried out bandpass filtering to digital signal, and the modulation signal that will be aliasing in each passerby's body physiological signal together from the frequency band decomposes and comes.
(6) modulation signal of each passerby's body physiological signal is carried out the digital envelope detection that realizes with Hilbert transform, reduction obtains the physiology signal of each road low frequency.
The collection of a kind of physiology signal in the present embodiment and processing system are used for multichannel physiology signal to sensor acquisition and receive by the MIC interface and carry out Treatment Analysis, it is characterized in that, this system comprises:
Amplify conditioning unit, the multichannel physiology signal that is used for gathering amplifies respectively and nurses one's health;
Modulating unit is used for each passerby's body physiological signal is carried out the audio frequency which amplitude modulation, and wherein, the frequency of the modulated carrier of every road signal is different;
Recombiner unit, each the passerby's body physiological signal after being used for modulating is superposed to one road composite audio signal, and this composite audio signal and MIC interface are coordinated, thereby transmitting by the MIC interface;
Sampling unit, it is used for the composite audio signal that transmits from the MIC interface is sampled, and is converted to digital signal;
The filtering resolving cell, it is by utilizing the digital band-pass filter group that described digital signal is carried out bandpass filtering, described composite audio signal is decomposed into from the frequency band the modulation signal of each corresponding passerby's body physiological signal;
The demodulation analysis unit, it is used for each the road modulation signal after decomposing is carried out the envelope detection reduction, and will obtain each passerby's body physiological signal and carry out analyzing and processing, gathers and analyzing and processing thereby finish.
Fig. 1 is the smart mobile phone multi-lead electrocardiograph the general frame of a MIC interface as an example of the electrocardio detection example in the present embodiment.The electrocardiosignal of multi-lead synthesizes the signal of one road MIC electrical code through signal condition, Modulation and Amplitude Modulation, signal composite quilt, then be plugged on the mobile phone by the MIC interface, at last with the virtual instrument software on the mobile phone to compound multi-lead electrocardiosignal gather, demodulation, demonstration and analysis.
Fig. 2 is the multichannel physiology signal measuring probe design frame chart of MIC interface in the present embodiment.First each road body physiological signal is amplified respectively and filtering, then carry out the amplitude adjustment with different carrier signals, synthesize at last one road composite human body physiological signal.The physiology signals such as electrocardio, pulse, blood oxygen saturation are low frequency signal, and highest frequency component is also with regard to tens hertz.When realizing that with frequency multiplexing technique a MIC passage transmits the multichannel physiology signal, higher about 10 times than modulated signals by carrier frequency, the audio available reference carrier wave for example is roughly 1 KHz to 20 KHz; Sound card is commonly used sample frequency 44 KHz, and by 1/5 reliable signal frequency band, the sound carrier interval is reduced to 1 KHz to 8 KHz; Physiology signal bandwidth by 100 hertz; Therefore, can use such as 1000 hertz, 2000 hertz, 3000 hertz, 4000 hertz etc. as carrier wave, can realize nearly eight tunnel physiology signal transmission.
Fig. 3 is compound multichannel physiology signal software demodulation block diagram in the present embodiment.With sound card the composite human body physiological signal is sampled first, be converted into digital signal; Then for example be 200 hertz with one group of bandwidth, mid frequency is that 1000 hertz, 2000 hertz, 3000 hertz, 4000 hertz etc. band-pass filter group decomposes signal; At last each filtered bandpass signal is carried out digital envelope detection with Hilbert transform, just can demodulate each passerby's body physiological signal.Thereby realize showing, analyzing as the domestic Medical Instruments with smart mobile phone, computer the purpose of main frame.Wave filter in the band-pass filter group is selected the FIR wave filter, can go out each filter coefficient with the design of filter tool design among the Matlab first, and the filtration module that then filter coefficient is write virtual instrument software is just passable; Hilbert transform in the digital envelope detection then can be called the FFT function and be realized.
Fig. 4-the 6th, the electrocardio probe designs circuit diagram of the MIC interface as an example of the electrocardio detection example in the present embodiment, the measuring probes such as blood oxygen, pulse can be determined with reference to this.
Wherein Fig. 4 is the circuit block diagram of amplification and filtration module.The representative value of human ecg signal amplitude is 1 millivolt, here by three grades of amplifications, signal is amplified for example 1000 times, to satisfy the MIC electrical code; Adopt in addition the difference input mode, instrument amplifies with instrument, removes common-mode noise; The frequency band of filter circuit is for example 0.5 hertz to 100 hertz, is used for the filtering human body and rocks high frequency interference such as waiting the low-frequency disturbance that causes and electromagnetic noise; In addition, be provided with a for example notch filter of 50 hertz, the power supply that is used for 50 hertz of filterings disturbs.
Fig. 5 is circuit block diagram and the specific implementation circuit diagram of signal amplitude modulation module in the present embodiment.By changing signal generator peripheral circuit resistance capacitance value, can carrier frequency be set to for example 1000 hertz, 2000 hertz, 3000 hertz etc.Then led in each road conditioned electrocardiosignal and corresponding frequency band carrier multiplication are carried out Modulation and Amplitude Modulation.
Fig. 6 is circuit block diagram and the specific implementation circuit diagram of signal composite module in the present embodiment.By adder, each road electrocardiosignal is synthesized the signal of one road MIC electrical code.In circuit, add clamp circuit, avoid the composite signal amplitude to surpass the sound card maximum range, damage sound card.For guaranteeing compound physiological signal amplitude in the sound card maximum range, before summation, the amplitude of each road signal should be controlled within the ideal range.Along with the number that leads, the increase of composite signal number, the amplitude of each road signal is wanted corresponding reduction.
Those skilled in the art will readily understand; the above only is preferred embodiment of the present invention; not in order to limiting the present invention, all any modifications of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. the collection of a physiology signal and processing method, it can have the multichannel physiology signal input of sensor acquisition in the equipment of MIC interface and carries out Treatment Analysis, it is characterized in that, and the method comprises:
S1: the multichannel physiology signal of sensor acquisition is amplified respectively and nurse one's health;
S2: each passerby's body physiological signal is carried out the audio frequency which amplitude modulation, and wherein, the frequency of the modulated carrier of every road signal is different;
S3: each the passerby's body physiological signal after will modulating is superposed to one road composite audio signal, and itself and MIC interface are coordinated, thereby being input in the equipment by the MIC interface;
S4: the described equipment with MIC interface is sampled to this composite audio signal of inputting from its MIC interface, and is converted to digital signal;
S5: utilize the digital band-pass filter group that described digital signal is carried out bandpass filtering, described composite audio signal is decomposed into from the frequency band the modulation signal of each corresponding passerby's body physiological signal;
S6: each the road modulation signal after decomposing is carried out the envelope detection reduction, obtain each passerby's body physiological signal, can carry out analyzing and processing.
2. the collection of physiology signal according to claim 1 and processing method is characterized in that, the mid frequency of each wave filter is corresponding one by one with the frequency of described modulated carrier respectively in the described digital band-pass filter group.
3. the collection of physiology signal according to claim 1 and 2 and processing method is characterized in that, the sound card of the equipment by the described MIC of having interface of sampling from the composite audio signal of described MIC interface input is realized.
4. the collection of each described physiology signal and processing method is characterized in that according to claim 1-3, and described equipment can be smart mobile phone, PC or panel computer.
5. the collection of each described physiology signal and processing method is characterized in that according to claim 1-4, and the wave filter in the described band-pass filter group can be the FIR wave filter.
6. the collection of a physiology signal and processing system are used for the multichannel physiology signal of sensor acquisition is received to carry out Treatment Analysis by the MIC interface, it is characterized in that, this system comprises:
Amplify conditioning unit, be used for multichannel physiology signal with sensor acquisition and amplify respectively and nurse one's health;
Modulating unit is used for each passerby's body physiological signal is carried out the audio frequency which amplitude modulation, and wherein, the frequency of the modulated carrier of every road signal is different;
Recombiner unit, each the passerby's body physiological signal after being used for modulating is superposed to one road composite audio signal, and this composite audio signal and described MIC interface are coordinated, thereby transmitting by the MIC interface;
Sampling unit, it is used for the composite audio signal that transmits from the MIC interface is sampled, and is converted to digital signal;
The filtering resolving cell, it utilizes the digital band-pass filter group that described digital signal is carried out bandpass filtering, described composite audio signal is decomposed into from the frequency band the modulation signal of each corresponding passerby's body physiological signal;
The demodulation analysis unit, it is used for each the road modulation signal after decomposing is carried out the envelope detection reduction, obtains each passerby's body physiological signal, thereby to carry out analyzing and processing.
7. the collection of a kind of physiology signal according to claim 6 and processing system is characterized in that, the mid frequency of each wave filter is corresponding one by one with the frequency of described modulated carrier respectively in the described digital band-pass filter group.
8. according to claim 6 or the collection of 7 described a kind of physiology signals and processing system, it is characterized in that, the wave filter in the described band-pass filter group can be the FIR wave filter.
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| CN110248591A (en) * | 2017-01-04 | 2019-09-17 | 皇家飞利浦有限公司 | For sensing the sensor device and method of the physiologic information of object |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015079359A1 (en) * | 2013-11-27 | 2015-06-04 | Harinath Garudadri | Ambulatory diagnostic device and method thereof |
| CN105873513A (en) * | 2013-11-27 | 2016-08-17 | 哈里纳特·加鲁达德里 | Ambulatory diagnostic device and method thereof |
| US10758132B2 (en) | 2013-11-27 | 2020-09-01 | Harinath Garudadri | Ambulatory diagnostic device and method thereof |
| US11583192B2 (en) | 2013-11-27 | 2023-02-21 | Harinath Garudadri | Sensor signal modulation |
| CN103750823A (en) * | 2014-01-13 | 2014-04-30 | 孙冰 | Pulse feeling instrument utilizing intelligent terminal to remotely feel pulse and method for utilizing terminal to remotely feel pulse |
| CN103750823B (en) * | 2014-01-13 | 2016-08-17 | 孙冰 | Pulse-taking instrument that a kind of intelligent terminal of utilization remotely feels the pulse and method thereof |
| CN103892813A (en) * | 2014-03-09 | 2014-07-02 | 浙江大学 | Human physiological parameter monitoring device |
| CN105355211A (en) * | 2014-08-18 | 2016-02-24 | 北京信威通信技术股份有限公司 | Noise reduction method for single-ended MIC common-mode noise |
| CN110248591A (en) * | 2017-01-04 | 2019-09-17 | 皇家飞利浦有限公司 | For sensing the sensor device and method of the physiologic information of object |
| CN110248591B (en) * | 2017-01-04 | 2022-05-31 | 皇家飞利浦有限公司 | Sensor device and method for sensing physiological information of a subject |
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Application publication date: 20130925 |