CN103800003B - A kind of ECG detecting method and detector - Google Patents
A kind of ECG detecting method and detector Download PDFInfo
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- CN103800003B CN103800003B CN201410026817.6A CN201410026817A CN103800003B CN 103800003 B CN103800003 B CN 103800003B CN 201410026817 A CN201410026817 A CN 201410026817A CN 103800003 B CN103800003 B CN 103800003B
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Abstract
The present invention provides a kind of ECG detecting method and detector.A kind of ECG detecting method includes the electrocardiosignal obtaining measured.Extract the characteristic parameter of the electrocardiosignal got.Default with in template base for the characteristic parameter extracted template Plays electrocardiosignal parameter is mated.Whether the match is successful to preset template Plays electrocardiosignal parameter in judging the characteristic parameter extracted and template base.If so, start credibility to calculate；If it is not, using the electrocardiosignal that gets as new default template renewal to template base in.Avoid tradition electrocardioscanner owing to the credibility of electrocardiosignal cannot be judged, and cause doctor cannot make effective diagnosis and treatment judge, the problem that false judgment even occurs time serious.
Description
Technical field
The present invention relates to medical electronics instrument field, and particularly to a kind of ECG detecting method and detector.
Background technology
In most of cardiovascular disease all relevant with arrhythmia.For ARR diagnosis, hospital
In normal method utilize electrocardiograph or holter system exactly.
Ecg wave form in the electrocardiogram function accurate recording short time, but due to the uncertainty of heart attacks,
Which substantially has bigger limitation, it is likely that cannot measure unusual waveforms.And holter system can be continuous
Record dynamic electrocardiogram information when patient long-time (about 24 hours) wears handset, then passed by network
Defeated or directly taken by patient hospital's host computer system complete analyze.But the poor real of which, handset portion
Divide and be only capable of record or transmission, there is no analytic function, patient is not had practical significance；And powerful main frame
Analysis system, expensive, ordinary people is difficult to burden.
Currently for patient individual, there is ECG detecting, the product of analytic function few, they make to suffer from
Person can monitor ecg wave form easily and store electrocardiogram (ECG) data, meets the needs of individual's cardioelectric monitor.But
In place of above product there is also some shortcomings.For convenience of measuring, above electrocardiogram equipment does not use tradition by viscous
Patch electrocardioelectrode or the method with electrocardio folder；But use gauger actively by the position such as hand or thorax abdomen
Skin is close to the metal electrode on electrocardiogram equipment surface.In actual measurement, if metal electrode is held the tightest by hand
Or it is too tight that skin of chest abdomen againsts metal electrode, and respective muscle will enter tense situation, will produce greatly
Myoelectricity disturb and be added on ecg wave form.Whereas if hold more loose or contact skin-contacting electrodes relatively
Pine, then contact impedance becomes significantly.In addition the shake of human body also can bring about greatly interference, and disturbs one big,
ECG detecting mistake and ARR erroneous judgement very likely occur.
Doctor or experienced user can be according to the ecg wave form quality on electrocardiogram equipment display screen when measuring
Adjust human body and metal electrode exposure level, thus this part user Detection results is preferable.
But, most user also do not know about the concrete connotation of various actual ecg wave form, thus cannot be carried out
Relevant posture and press the adjustment of surging, very likely there will be during measurement and disturbs largely and cause the heart
Electro-detection mistake and ARR erroneous judgement.Even if it addition, sometimes interference magnitude is the biggest, but by
Near the characteristic point just occurring in ECG detecting, remain on the detection judgement that can badly influence electrocardiogram equipment,
Give the result made mistake, the most even cannot be according only to the waveform that liquid crystal display screen shows to judge the quality of signal.
Although the electrocardiogram (ECG) data during measuring can also be stored and seek help from doctor by electrocardiogram equipment.If but
Although the electrocardiogram (ECG) data preserved receives bigger interference or interference magnitude is little but cardiac electrical characteristic point
Near be but affected, doctor also can be because making effectively sentencing according to the signal of these " contaminated "
Disconnected, thus lose the foundation of diagnosis.ECG automatic analysis detection may make mistakes and wrong report occurs, and store
Data of getting off have no knowledge about whether may be used for diagnosis, and this reduces this series products to a great extent
Practical value.
Summary of the invention
Asking of the quality of the electrocardiosignal that the present invention detects to overcome existing electrocardioscanner to judge
Topic, it is provided that a kind of ECG detecting method and detector.This ECG detecting method and detector complete common
Electrocardio is measured while function, go back synchro measure whole during the size of skin contact impedance, and according to survey
The amount quality of the Process-centric signal of telecommunication and ECG detecting, judgement experienced interference influence degree big
Little detect, and provide the credibility prompting of this ECG detecting result, i.e. credibility.User can
This ECG detecting result or the cardioelectric monitor of this section of time memory storage is judged with the size according to credibility
Data are the most credible, if can be supplied to the foundation of doctor's behaviours diagnosis and treatment.Therefore the present invention and the existing heart
Electricity product compares, and can avoid some shortcomings of existing product, as often because interference causes greatly being diagnosed to be
Mistake, and user is not known, thus reduce the situation that instrument is trusted and occur.Also can judge accordingly to protect
Whether the electrocardiogram (ECG) data left is provided that to the foundation of doctor's behaviours diagnosis and treatment, if not all right, waits until confidence value
Till high electrocardiogram (ECG) data.
To achieve these goals, the present invention provides a kind of ECG detecting method, including: obtain measured's
Electrocardiosignal.Extract the characteristic parameter of the electrocardiosignal got.By the characteristic parameter extracted and template base
Interior template Plays electrocardiosignal parameter of presetting is mated.Judge the characteristic parameter that extracts with in template base
Whether the match is successful to preset template Plays electrocardiosignal parameter.If so, start credibility to calculate；If it is not,
Using the electrocardiosignal that gets as new default template renewal to template base in.
Above-mentioned heart one electro-detection method, wherein, presets template by the characteristic parameter extracted in template base
The step that Plays electrocardiosignal parameter carries out mating includes: calculate the characteristic parameter and default template extracted
Correlation coefficient between Plays electrocardiosignal parameter, maximum with correlation coefficient and exceed corresponding to setting threshold value
Template is as matching template.
A kind of above-mentioned ECG detecting method, wherein, template base includes current template storehouse and substitute template base, carries
First the characteristic parameter got mates with the default template in current template storehouse, if the template of coupling does not exists
In current template storehouse, then mate with the default template in substitute template base.
A kind of above-mentioned ECG detecting method, wherein, ECG detecting method also include obtaining electrocardio measure electrode with
Contact impedance between the body surface of measured.Stablize when testing result characterizes the contact impedance obtained and be positioned at expectation
Time in contact impedance threshold value, the characteristic parameter extracted is preset template Plays electrocardiosignal in template base
Parameter is mated.
Corresponding with above-mentioned ECG detecting method, the present invention also provides for a kind of electrocardioscanner, including at least
Two electrocardios measure electrode, parameter extractor, template storage, controller and data processor.
Wherein, electrocardio measures electrode for obtaining the electrocardiosignal of measured.Parameter extractor telecommunications connects the heart
Electrical measurement electrode, for extracting the characteristic parameter of the electrocardiosignal got.Template storage is used for storing pre-
If template, default template is used for storing standard cardioelectric signal parameter.Controller is electrically connected with characteristic parameter
Extractor and template storage, preset the template Plays heart by the characteristic parameter extracted in template storage
Electric signal parameter mates, and judges whether that the match is successful, if so, sends a control signal to data and processes
Device；If it is not, send a control signal to template storage, using the electrocardiosignal that gets as new default mould
Plate updates in template storage.Data processor is electrically connected with controller, receives the control that controller sends
Signal, and carry out credibility calculating.
Above-mentioned a kind of electrocardioscanner, wherein, electrocardioscanner also includes impedance monitor, impedance monitor
It is electrically connected with controller, measures the contact impedance between the body surface of electrode and measured for obtaining electrocardio.
Above-mentioned a kind of electrocardioscanner, wherein, it is equal that impedance monitor includes that quantity measures electrode with electrocardio
Impedance measurement electrode and impedance control unit.
Above-mentioned a kind of electrocardioscanner, wherein, impedance measurement electrode measures electrode close to being arranged at electrocardio, makes
The detection position obtaining measured can contact electrocardio measurement electrode and impedance measurement electrode simultaneously.
Above-mentioned a kind of electrocardioscanner, wherein, impedance control unit is a comparison circuit, and the one of comparator is defeated
Entering end and be electrically connected with impedance measurement electrode, another input is electrically connected with the threshold value being made up of variable resistance and sets
Device, outfan is electrically connected with controller.
Above-mentioned a kind of electrocardioscanner, wherein, template storage includes working as front mould for store current template
Board memory and for store substitute template substitute template storage.
In sum, the present invention compared with prior art has the advantage that the ECG detecting that the present invention provides
Method and detector, by the characteristic parameter of the electrocardiosignal that extraction gets, and by itself and template base
Preset template Plays electrocardiosignal parameter to mate, find matching template, using matching template as benchmark
Calculate the credibility of the electrocardiosignal detected.User can judge this heart according to the size of credibility
Whether electro-detection result can be supplied to the foundation of doctor's behaviours diagnosis and treatment.Avoid tradition electrocardioscanner due to
The credibility of electrocardiosignal cannot be judged, and cause doctor cannot make effective diagnosis and treatment and judge, time serious even
The problem that false judgment occurs.Further, when finding matching template in template base, controller will
The electrocardiosignal detected is as in new default template renewal to template base, it is achieved the adaptive updates of template.
Additionally, during carrying out template matching, use correlation coefficient process as template matching similarity degree
Criterion.To set, threshold value is as coupling benchmark and maximum with correlation coefficient and to exceed setting threshold value institute right
The template answered, as matching template, improves matching precision, and calculating for confidence value provides accurate basis reference.
Current template storehouse and substitute template base is included by arranging template base, due to the template huge amount of template base,
The substantial amounts of calculating time can be consumed when carrying out template matching.Therefore, preferentially normal with in current template storehouse is used
Mate by template, be greatly reduced the time shared by template matching, improve detection efficiency, improve product
Performance, can preferably meet user's needs.Further, increase the measurement of contact impedance, with contact resistance
Resist the most stable and whether be positioned at expected value to characterize this inspection center's electrical measurement electrode and measured's table
Contact wellness between skin, it is to avoid owing to electrocardio measures the bad contact between electrode and the body surface of measured
And the detection with a low credibility caused, reduce the factor that impact is with a low credibility, improve the credibility of detection.Will
Impedance measurement electrode measures electrode close to being arranged at electrocardio, and the detection position of measured can contact electrocardio simultaneously and survey
Amount electrode and impedance measurement electrode, improve the certainty of measurement of impedance measurement electrode.
For above and other objects of the present invention, feature and advantage can be become apparent, cited below particularly preferably
Embodiment, and coordinate accompanying drawing, it is described in detail below.
Accompanying drawing explanation
Fig. 1 show the flow chart of the ECG detecting method that the embodiment of the present invention one provides.
Fig. 2 show the schematic block circuit diagram of the electrocardioscanner that the embodiment of the present invention one provides.
Fig. 3 show the structural representation of the electrocardioscanner that the embodiment of the present invention one provides.
Fig. 4 show the occupation mode schematic diagram of the electrocardioscanner that the present invention provides.
Fig. 5 show the schematic block circuit diagram of the electrocardioscanner that the embodiment of the present invention two provides.
Fig. 6 show the circuit diagram of the compensating module that the embodiment of the present invention two provides.
Detailed description of the invention
Embodiment one
Fig. 1 show the flow chart of the ECG detecting method that the embodiment of the present invention one provides.Fig. 2 show this
The schematic block circuit diagram of the electrocardioscanner that inventive embodiments one provides.Fig. 3 show the embodiment of the present invention one
The schematic diagram of the electrocardioscanner provided.Fig. 4 show the occupation mode of the electrocardioscanner that the present invention provides
Schematic diagram.See also Fig. 1 to Fig. 4.
The basic process of ECG detecting method is: obtains the electrocardiosignal (such as step S101) of measured, and carries
Take the characteristic parameter (such as step S102) of the electrocardiosignal got.By the characteristic parameter extracted and template base
In default template Plays electrocardiosignal parameter carry out mating (such as step S103).Then, it is judged that coupling is
No success, if so, using matching template as benchmark, calculates the credibility of the electrocardiosignal detected (such as step
Rapid S104～S105)；If it is not, using the electrocardiosignal that gets as new default template renewal to template base in
(such as step S106).Template base exports information after updating, and reminds user need to again detect (such as step
S111).Until calculating confidence value.After credibility has calculated, carry out confidence value and be correlated with
The output display (such as step S110) of ECG detecting information.Combine Fig. 1 further below, to the present embodiment
In ECG detecting method be further described.
The method starts from step S101, and this step is in order to obtain the electrocardiosignal of measured.The acquisition herein referred to
It is that two electrocardios measure electrode 1 structures by arranging at least two electrocardio measurement electrode 1 contacted with user's body surface
Become differential input, eliminate common mode disturbances, improve accuracy of detection.
Due to a normal electrocardiosignal mainly by P ripple, QRS wave and T wave component.Corresponding just have P,
The ecg characteristics points such as Q, R, S, T.In step S102, use parameter extractor 2 realize P, Q, R,
The extraction of the characteristic parameter at the characteristic points such as S.
Step S103, this step is used for selecting matching template.The selection how realizing matching template is by meter
The characteristic parameter extracted and template base are preset the correlation coefficient between template Plays electrocardiosignal parameter,
And this correlation coefficient is compared with setting threshold value, maximum with correlation coefficient and exceed corresponding to setting threshold value
Template be matching template.Specifically, such as R ripple in QRS wave during T represents the electrocardiosignal detected
Signal value at Dian, and in S is template base, parameter at corresponding R wave point in a certain default template, then
Correlation coefficient between them is:
Wherein Cov (T, S) is signal T, the covariance of S, and D (T), D (S) are then respectively the variance of T, S.
By being compared with setting threshold value by R (T, S), in the present embodiment, set threshold value as 0.9.It is computed ratio
Choose more afterwards more than the template corresponding to the maximum in the correlation coefficient of 0.9 as the electrocardiosignal got
Matching template.By choose maximum correlation coefficient corresponding to template as matching template, be greatly increased
Matching precision, the calculating for credibility provides accurate benchmark.
Step S104 for determining whether R(T, S) more than set threshold value 0.9, if having, then it is assumed that template
It is made into merit.Perform step S105, using the credibility of the electrocardiosignal that this matching template obtains as benchmark
Value.Credibility calculates can use the probability weight estimation technique, Estimation of Mean method, variance evaluation method, mean testing
The methods such as method realize.The present embodiment uses average estimation algorithm calculate confidence value, first will get
Electrocardiosignal value subtract each other with the parameter in matching template, obtain difference signal, and by this difference signal
Carry out average estimation and draw this confidence value measured.The form with percentage ratio of confidence value shows.
But, computational methods and the display mode of credibility are not limited in any way by the present invention.In other embodiments
In, credibility computational methods can be the combination of any one or several in said method or other statistics meter
Calculation method.After credibility has calculated, perform step 110, the confidence value of gained and relevant will be calculated
ECG detecting information carries out output display.But, when step S104 judges that coupling is unsuccessful, perform step
S106, using the electrocardiosignal that gets as new default template renewal to template base in, it is achieved template base
Adaptive updates, expands template base further, improves the precision of detection.Template base performs step S111 after updating,
Output information, reminds user again to detect.
But, along with the adaptive updates of template base, the template number in template base will be continuously increased.Holding
During template matching in row step S103, electrocardioscanner need to devote a tremendous amount of time the feature calculating extraction
Correlation coefficient between corresponding standard cardioelectric signal parameter in parameter and default template, detection efficiency is low, user
In-convenience in use.For avoiding the appearance of the problems referred to above, it is set to template base include current template storehouse and substitute
Template base.Owing to electrocardiosignal exists universal similarity, therefore prestore in current template storehouse 20 and commonly use
Template.The characteristic parameter extracted the first respective standard electrocardiosignal in conventional template with in current template storehouse
Parameter is mated, if mate unsuccessful again with substitute template base in default template in relevant parameter carry out
Coupling.The method using second degree matches realizes template matching, greatly adds the efficiency of coupling, improves
The detection efficiency of electrocardioscanner, improves the detection performance of electrocardioscanner.
Further, for improving accuracy of detection, the factor affecting credibility is reduced.ECG detecting method is also wrapped
Include acquisition electrocardio measurement electrode to contact with the contact impedance (step S107) between the body surface of measured and judgement
Impedance is the most stable and is positioned at expectation contact impedance threshold value (step S108).Obtain when testing result characterizes
Contact impedance stable and when being positioned at expectation contact impedance threshold value, perform step S103, the spy that will extract
Levy parameter template Plays electrocardiosignal parameter default with in template base to mate.Otherwise, measured is reminded
Check that electrocardio measures the contact condition between electrode 1 and measured's body surface, until the contact impedance detected meets
Require (step S109).Step S107～S109 is increased, it is to avoid owing to electrocardio is measured before step S103
Bad contact between electrode and the body surface of measured and the detection with a low credibility that causes, reduce impact credible
Spend low factor, improve the credibility of detection.
On the basis of the above, a kind of electrocardioscanner provided the present invention below is described.
A kind of electrocardioscanner includes that at least two electrocardio measurement electrode 1, parameter extractor 2, template are deposited
Reservoir 3, data processor 5 and controller 4.Wherein, electrocardio measures electrode 1 for obtaining measured's
Electrocardiosignal.Parameter extractor 2 is for extracting the characteristic parameter of the electrocardiosignal got.Template is deposited
Reservoir 3 is used for storing default template, and default template is used for storing standard cardioelectric signal parameter.Controller 4 points
Not electricity Xing Lianjie parameter extractor 2 and template storage 3, the characteristic parameter that extract is stored with template
Preset template Plays electrocardiosignal parameter in device 3 to mate, and judge whether that the match is successful.If so,
Send a control signal to data processor 5；If it is not, send a control signal to template storage 3, will get
Electrocardiosignal as in new default template renewal to template storage 3.Data processor 5 is electrically connected with
Controller 4, receives the control signal that controller 4 sends, and carries out credibility calculating.
A kind of electrocardioscanner includes that parameter extractor 2, parameter extractor 2 are electrically connected with electrocardio and survey
Amount electrode 1.Due to a normal electrocardiosignal mainly by P ripple, QRS wave and T wave component.Use spy
Levy parameter extractor 2 and realize the extraction of the characteristic parameter at the characteristic points such as P, Q, R, S.In the present embodiment,
Parameter extractor 2 is made up of analog-digital converter and data acquisition unit.Electrocardio can be surveyed by analog-digital converter
The analogue signal that amount electrode 1 detects is converted to digital signal, and the numeral that data acquisition unit is after conversion is believed
Required characteristic parameter is extracted in number.But, this is not limited in any way by the present invention.
A kind of electrocardioscanner includes template storage 3.Wherein, template storage 3 includes for storing current
The current template memorizer 31 of template and for storing the substitute template storage 32 of substitute template.The present embodiment
In, use can the FLASH memory of storing data permanently as template storage 3, it is ensured that template storage 3
Interior template can preserve for a long time.Additionally, template storage 3 can be additionally used in addition to being used for storing default template
Store the ecg wave form detected and detection data, it is simple to user checks in the future.
A kind of electrocardioscanner includes controller 4 and data processor 5.The feature that controller 4 will extract
Parameter with preset template Plays electrocardiosignal parameter in template storage 3 and mate, and judge whether
It is made into merit.Concrete matching process can use and calculate the characteristic parameter and default template Plays electrocardio extracted
Correlation coefficient between signal parameter, chooses correlation coefficient maximum and more than setting the template of threshold value as coupling mould
Plate.If the match is successful, controller 4 sends one and controls signal to data processor 5, and data processor 5 is carried out
Credibility calculates.Calculating sends feedback signal after completing and sends a control signal to defeated to controller 4, controller 4
Go out equipment 6, output confidence value and relevant ECG detecting information.In the present embodiment, by data processor
5 and controller 4 be integrated in same chip, this chip model is TMS320F2802.But, the present invention
This is not limited in any way.In other embodiments, data processor 5 and controller 4 can be provided separately.
And in the present embodiment, confidence value shows with the form of percentage ratio.
Further, for avoiding due to the bad contact between electrocardio measurement electrode 1 and the body surface of measured
The detection with a low credibility caused, reduces the factor that impact is with a low credibility, improves the credibility of detection.A kind of
Electrocardioscanner also includes that impedance monitor 7, impedance monitor 7 quantity measure, with electrocardio, the resistance that electrode 1 is equal
Anti-measurement electrode 71 and impedance control unit 72.In the present embodiment, it is two that electrocardio measures electrode 1,
Corresponding impedance measurement electrode 71 is also two.But, this is not limited in any way by the present invention.Impedance control
Unit 72 is comparator, and an input of comparator is electrically connected with impedance measurement electrode 71, another input electricity
Property connect the threshold setting device that is made up of variable resistance, in order to set contact impedance expectation threshold value, and comparator
Outfan be electrically connected with controller 4.In actual use, survey with electrocardio due to its body surface of different measured
It is different that amount electrode 1 contacts produced contact impedance, and measured can be in advance through repeatedly surveying when measuring
Amount obtains its body surface and contacts produced contact impedance with electrocardio measurement electrode 1, and this value is inputted threshold value
The standard that setting apparatus is measured as contact impedance.Adjustable impedance control unit 72 can meet different quilt significantly
The demand of survey person, improves the versatility of electrocardioscanner.
Owing to contact impedance is continuously increased increasing along with the distance of detection.Therefore, in the present embodiment,
Impedance measurement electrode 71 is set and measures electrode 1 close to being arranged at electrocardio so that the detection position of measured can be same
Time contact electrocardio measure electrode 1 and impedance measurement electrode 71, substantially increase accuracy of detection.Described is close
Arrange can be understood as under not overlapping cases as close possible to.Additionally, user uses different for convenience
Detection position, such as hand, head or other body part, measures electrode 1 and impedance measurement electrode by electrocardio
71 are disposed as external touch electrode.
Further, a kind of electrocardioscanner also includes ecg wave form and the controller arrived for output detections
The outut device 6 of the confidence value of output and facilitate user to control the input of duty of electrocardioscanner
Equipment 8.Wherein input equipment 8 includes switch key 81, starts to measure button 82, stop measuring button 83
And data upload 84 4 buttons of button.But, this is not limited in any way by the present invention.Specifically,
User presses and starts to measure button 82, and electrocardioscanner starts to measure electrocardiosignal and contact impedance.Work as output
When equipment output confidence value and corresponding detection data, user presses stopping and measuring button 83, terminates this
Secondary measurement.Utilizing data to upload button 84, this measurement result can be uploaded to by user by USB interface 9
On host computer.By arranging input equipment 8, the work process of electrocardioscanner and function can be selected by it
Select.
Further, for improving detection degree of accuracy, ECG detecting distorted signals is prevented.In the present embodiment,
Electrocardio is measured between electrode 1 and parameter extractor 2 and impedance measurement electrode 71 and impedance control unit 72
Between be provided with ECG's data compression device 10 and impedance signal processor 11.ECG's data compression device 10 includes the heart
Electrical signal filter 101 and ecg signal amplifier 102, and impedance signal processor 11 includes that impedance is believed
Number wave filter 111 and impedance signal amplifier 112.Filtering of ECG Signal device 101 and impedance signal wave filter
111 can filter multiple interference signal, such as Hz noise etc..Ecg signal amplifier 102 and impedance signal amplify
The electrocardiosignal detected and impedance signal can be amplified by device 112, prevent distorted signals.Preferably,
The model of ecg signal amplifier 102 and impedance signal amplifier 112 is AD623.But, the present invention couple
This is not limited in any way.
A kind of electrocardioscanner provided for a better understanding of the present invention, now makees such as its concrete work process
Lower description: open switch key 81, makes electrocardioscanner in running order.Then measured right-hand man divides
Two electrocardios of not holding with a firm grip measure electrode 1 and impedance measurement electrode 71, in order to extract electrocardiosignal and contact
Impedance.Pressing after starting to measure button 82, electrocardio is measured electrode 1 and is started to detect electrocardiosignal, impedance measurement
Electrode 71 starts to measure electrocardio and measures the contact impedance between electrode 1 and measured's body surface, and now measured should protect
Hold right-hand man's posture constant.Impedance control unit 72 judges that the contact impedance detected is the most stable and is positioned at the phase
In prestige threshold value.If it is not, send another signal to controller 4, controller 4 controls outut device 6 output warning
Information, electrocardio is measured electrode 1 and contacts situation between body surface to remind measured to check, until detect connects
Till touching the satisfied requirement of impedance.If so, impedance control unit 72 sends a signal to controller 4.Controller
4 send a control signal to outut device 6 so that it is output information, remind user both hands can be departed from electrocardio
Detector.And by the characteristic parameter extracted and the default template Plays electrocardiosignal in template storage 3
Parameter carries out mating (S103), and judges whether that the match is successful (S104).If so, a control signal is sent
To data processor 5, start credibility and calculate (S105).If it is not, controller 4 sends two control signals,
One of them sends to template storage 3, using the electrocardiosignal that gets as new default template renewal to mould
In board memory 3 (S106), it is achieved the adaptive updates of template storage 3.Another control signal sends
The information (S111) of detection need to be re-started to outut device 6 output.Data processor 5 completes credible
After degree calculates, send feedback signal to controller 4.Controller 4 sends a control signal to outut device 6, makes
Its output confidence value and corresponding ECG detecting information (S110).
Embodiment two
As shown in Figure 5 and Figure 6, the present embodiment and embodiment one and change essentially identical, difference is:
Electrocardio measures the quantity of electrode 1 and impedance measurement electrode 71 for being three.Two of which electrocardio measures electrode
1 is used for extracting electrocardiosignal, and the 3rd electrocardio is measured electrode 1 and be electrically connected with compensating module 113.Compensating module
The other end of 113 is electrically connected with the feedback end of ecg amplifier 112, ecg amplifier 112 feedback end and
The input of electrocardiosignal sets up Commom-mode feedback, offsets Hz noise to greatest extent, improves accuracy of detection.
In the present embodiment, compensating module 113 is made up of multiple feedback resistances and operational amplifier.3rd heart
Electrical measurement electrode 1 may be provided at the leg of measured.But, this is not limited in any way by the present invention.
In sum, the present invention compared with prior art has the advantage that a kind of electrocardio that the present invention provides
Detection method and detector, by the characteristic parameter of the electrocardiosignal that extraction gets, and by itself and template base
In default template in corresponding characteristic curve mate, find matching template, using matching template as base
The accurate credibility calculating the electrocardiosignal detected.User can judge this time according to the size of credibility
Whether ECG detecting result can be supplied to the foundation of doctor's behaviours diagnosis and treatment.Avoid tradition electrocardioscanner by
In judging the credibility of electrocardiosignal, and cause doctor cannot make effective diagnosis and treatment and judge, time serious very
To the problem that false judgment occurs.Further, when template base cannot find matching template, controller
Using the electrocardiosignal that detects as new default template renewal to template base in, it is achieved the self adaptation of template is more
Newly.
Additionally, during carrying out template matching, use correlation coefficient process as template matching similarity degree
Criterion.To set, threshold value is as coupling benchmark and maximum with correlation coefficient and to exceed setting threshold value institute right
The template answered, as matching template, improves matching precision, and calculating for confidence value provides accurate basis reference.
Current template storehouse and substitute template base is included by arranging template base, due to the template huge amount of template base,
The substantial amounts of calculating time can be consumed when carrying out template matching.Therefore, preferentially normal with in current template storehouse is used
Mate by template, be greatly reduced the time shared by template matching, improve detection efficiency, improve product
Performance, can preferably meet user's needs.Further, increase the measurement of contact impedance, with contact resistance
Resist the most stable and be positioned at expected value to characterize this inspection center's electrical measurement electrode 1 and measured's epidermis
Between contact wellness, it is to avoid owing to electrocardio measures the bad contact between electrode 1 and the body surface of measured
And the detection with a low credibility caused, reduce the factor that impact is with a low credibility, improve the credibility of detection.Will
Impedance measurement electrode 71 measures electrode 1 close to being arranged at electrocardio, and the detection position of measured can contact the heart simultaneously
Electrical measurement electrode 1 and impedance measurement electrode 71, improve the certainty of measurement of impedance measurement electrode 71.
Although the present invention is disclosed above by preferred embodiment, but it is not limited to the present invention, any ripe
Know this those skilled in the art, without departing from the spirit and scope of the present invention, a little change and retouching can be made, therefore
Protection scope of the present invention is when being as the criterion depending on claims scope required for protection.
Claims (3)
1. an electrocardioscanner, it is characterised in that including:
At least two electrocardio measures electrode, for obtaining the electrocardiosignal of measured；
Parameter extractor, for extracting the characteristic parameter of the electrocardiosignal got；
Template storage, is used for storing default template, and described default template is used for storing standard cardioelectric signal parameter；
Controller, it is electrically connected with described parameter extractor and template storage, default with in template storage for the characteristic parameter extracted template Plays electrocardiosignal parameter is mated, and judges whether that the match is successful, if so, data processor is sent a control signal to；If it is not, send a control signal to template storage, using the electrocardiosignal that gets as new default template renewal to template storage in；
Concrete coupling step is to calculate in the characteristic parameter and template base extracted to preset the correlation coefficient between template Plays electrocardiosignal parameter, and this correlation coefficient is compared with setting threshold value, maximum with correlation coefficient and exceed and set the template corresponding to threshold value as matching template, the computational methods of correlation coefficient are as follows:
Wherein Cov (T, S) is signal T, the covariance of S, and D (T), D (S) are then respectively the variance of T, S, T represents in the electrocardiosignal detected the signal value in QRS wave at R wave point, and in S is template base, parameter at corresponding R wave point in a certain default template；
Data processor, it is electrically connected with described controller, receive the control signal that described controller sends, and carry out credibility calculating, credibility calculates and any one in the probability weight estimation technique, Estimation of Mean method, variance evaluation method, mean value test method can be used to calculate, and confidence value shows with the form of percentage ratio；
Impedance monitor, described impedance monitor is electrically connected with described controller, measure the contact impedance between the body surface of electrode and measured for obtaining described electrocardio, described impedance monitor includes that quantity measures the equal impedance measurement electrode of electrode and impedance control unit with described electrocardio.
A kind of electrocardioscanner the most according to claim 1, it is characterised in that described impedance measurement electrode measures electrode close to being arranged at described electrocardio so that the detection position of measured can contact described electrocardio simultaneously and measure electrode and described impedance measurement electrode.
A kind of electrocardioscanner the most according to claim 1, it is characterized in that, described impedance control unit is a comparison circuit, one input of comparator is electrically connected with described impedance measurement electrode, another input is electrically connected with the threshold setting device being made up of variable resistance, and outfan is electrically connected with described controller.
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| CN106137184B (en) * | 2015-04-08 | 2019-02-12 | 四川锦江电子科技有限公司 | Electrocardiosignal QRS complex detection method based on wavelet transformation |
| CN106859632A (en) * | 2015-12-11 | 2017-06-20 | 包骏 | A kind of contactless electrocardiogram equipment of wearable real time multi-channel and its cardioelectric monitor method |
| CN106383808B (en) * | 2016-09-18 | 2019-08-02 | 时瑞科技（深圳）有限公司 | The processing system and method for heart rate electrocardiosignal |
| WO2018137300A1 (en) * | 2017-01-25 | 2018-08-02 | 华为技术有限公司 | Method and apparatus for determining quality of physiological signal |
| CN106901720A (en) * | 2017-02-22 | 2017-06-30 | 安徽华米信息科技有限公司 | The acquisition method of electrocardiogram (ECG) data, device and wearable device |
| CN106901724A (en) * | 2017-04-26 | 2017-06-30 | 河南省中医院（河南中医药大学第二附属医院） | Electrocardiogram testing device and testing method |
| CN107397547A (en) * | 2017-08-01 | 2017-11-28 | 深圳大学 | A kind of ECG typical case's heart beat template generation method and system |
| CN107647860B (en) * | 2017-08-31 | 2021-01-15 | 深圳和而泰智能控制股份有限公司 | Heart rate detection method and device, electronic equipment and storage medium |
| CN110859613B (en) * | 2019-11-20 | 2022-07-22 | 深圳市健云互联科技有限公司 | Electrocardiogram data processing device, computer device, and storage medium |
| CN111150387B (en) * | 2020-01-15 | 2021-06-08 | 深圳市邦健科技有限公司 | Electrocardiogram template matching method and device, computer equipment and storage medium |
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| CN111616696B (en) * | 2020-05-20 | 2024-07-26 | 联想(北京)有限公司 | Electrocardiosignal detection method, electrocardiosignal detection device and storage medium |
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