CN103099615A - Method and device for eliminating exercise electrocardiosignal interference - Google Patents
Method and device for eliminating exercise electrocardiosignal interference Download PDFInfo
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Abstract
The invention relates to a method and a device for eliminating exercise electrocardiosignal interference. The method includes the following steps: collecting exercise electrocardiosignals and exercise reference signals; carrying out amplification and lowpass filtering on fixed gain of collected exercise electrocardiosignals; carrying out analog-digital conversion on amplified and lowpass filtered exercise electrocardiosignals and obtaining digital exercise electrocardiosignals; judging exercise interference degree of the digital exercise electrocardiosignals, and obtaining the exercise interference degree; carrying out self-adaptive elimination on the exercise electrocardiosignals and the exercise reference signals according to the exercise interference degree, and obtaining the exercise electrocardiosignals without interference. According to the method and the device, even when the exercise interference degree is very high, good exercise electrocardiosignals can still be obtained through offset of the exercise electrocardiosignals and the exercise reference signals, and accuracy and stability of eliminating exercise electrocardiosignal interference are improved.
Description
Technical field
The present invention relates to a kind of method and device that electrocardiosignal is disturbed of eliminating, be specifically related to a kind of method and apparatus that exercise ECG disturbs of eliminating.
Background technology
At present, the ST section of exercise ECG waveform is the important indicator of assess cardiac sports load, and therefore in the exercise ECG measuring process, the distortion that reduces exercise ECG waveform ST section is extremely important.Typical exercise ECG DATA REASONING scheme has two kinds, the first motion measurement scheme is dull and stereotyped walking or road-work, its advantage is that everybody can do, shortcoming is that the experimenter needs ceaselessly walking or running, cause the electrocardiographic wave baseline fluctuation that collects large, sometimes the ST section of almost illegible ecg wave form even.The second motion measurement scheme is treadmill movement, the advantage of treadmill movement scheme is experimenter's upper body held stationary relatively, therefore the electrocardiographic wave baseline that monitors is more steady, shortcoming be can be not by bike people's lower limb can very fast fatigue, the overall movement quantity not sufficient can not reach the target heart of setting.Comprehensive above 2 points, due to the motion scheme that adopts treadmill, the experimenter is not easy to reach target heart, and therefore present main flow exercise ECG testing scheme still adopts the scheme of treadmill exercise.
The testing scheme of treadmill exercise requires experimenter's ceaselessly motion in the process of measuring, and is convenient to make experimenter's heart rate to reach setting value.Due to human body when the strenuous exercise, the ecg wave form baseline drift that collects is larger, and the degree of exercise ECG waveform baseline drift is subjected to the movement velocity of human body and the impact of motion mode and frequency difference between each one, so measurement device need to reduce motion artifacts to the impact of exercise ECG waveform.In the human motion process, a large amount of irregular interference that superposeed on the ecg wave form that collects can have a strong impact on software to the analysis of ST section.Traditional method is to set the mutually different digital filter of a series of cut-off frequencies, is respectively the high-pass digital filter of 0.5Hz or 1Hz such as the setting cut-off frequency, the motion artifacts in the filtering exercise electrocardiogram signal.When the motion artifacts amplitude was larger, the digital filter that the selective cut-off frequency is higher carried out filtering to exercise electrocardiogram signal.But the interfering signal that causes due to human motion, its frequency is not what fix, and its highest frequency is easy to surpass the cut-off frequency of high pass filter, cause high pass filter bad to the filter effect of interfering signal, the effectively baseline drift in filtering exercise ECG waveform, the digital filter of crossing higher cutoff frequency also can cause the ST section serious distortion of exercise ECG waveform, further causes occurring relatively large deviation with ST section waveform morphology, amplitude as evaluation index; Therefore prior art exists anti-movement effects poor, in the exercise ECG measuring process, experimenter strenuous exercise, the exercise electrocardiogram signal waveform is drift up and down significantly, if adopt the low digital filter of cut-off frequency, baseline drift in can't filtering exercise ECG waveform, the signal in also just can't the filtering exercise electrocardiogram signal disturbs; If adopt the higher digital filter of cut-off frequency, cause the ST section distortion of ecg wave form, affect follow-up ST piecewise analysis, make analysis result have relatively large deviation.
Summary of the invention
For overcoming defects, the technical problem to be solved in the present invention namely is to provide a kind of method and device that exercise electrocardiogram signal disturbs of eliminating;
The objective of the invention is to be achieved through the following technical solutions:
A kind of method of eliminating the exercise electrocardiogram signal interference of the present invention comprises the steps: to gather exercise electrocardiogram signal and motion reference signal; To amplifying and low-pass filtering treatment of the exercise electrocardiogram signal fixed gain that gathers; Exercise electrocardiogram signal after amplification and low-pass filtering treatment is carried out analog-to-digital conversion process, obtain the exercise electrocardiogram signal of numeral; Exercise electrocardiogram signal to numeral carries out the judgement of motion artifacts width, the size of judgement motion artifacts amplitude; According to the size of motion artifacts amplitude, exercise electrocardiogram signal and motion reference signal are carried out the self adaptation elimination, obtain the exercise electrocardiogram signal of filtering interfering; Wherein, when judgement motion artifacts amplitude is large, exercise electrocardiogram signal and reference signal are carried out the self adaptation elimination; Described to exercise electrocardiogram signal and the motion reference signal carry out the step that self adaptation eliminates and comprise: the motion reference signal that gathers is divided into the identical motion reference signal output of two-way; Motion reference signal to one tunnel carries out the phase shift conversion, the motion reference signal after acquisition phase shift conversion; Another road motion reference signal is carried out delay disposal, and the motion reference signal after making this road motion reference signal and carrying out the phase shift conversion is synchronizeed and is exported; Again this two-way motion reference signal is weighted summation and processes, obtain to estimate the motion reference signal; The exercise electrocardiogram signal that gathers is divided into the identical exercise electrocardiogram signal output of two-way; One road exercise electrocardiogram signal is carried out QRS complex wave Check processing; Another road exercise electrocardiogram signal is carried out delay disposal, the exercise electrocardiogram signal that makes this road with estimate the motion reference signal and synchronize and export; Exercise electrocardiogram signal after delay disposal is asked poor processing with estimating the motion reference signal, obtain the exercise electrocardiogram signal of filtering interfering.
A kind of method of eliminating the exercise electrocardiogram signal interference after wherein obtaining the exercise electrocardiogram signal of numeral, comprises that also the exercise electrocardiogram signal to mathematics carries out high-pass filtering processing and low-pass filtering treatment.
A kind ofly eliminate the method that exercise electrocardiogram signal disturbs, wherein said size to the motion artifacts width judges and comprises digital exercise electrocardiogram signal is carried out bandpass filtering treatment, obtains the motion artifacts signal; The motion artifacts signal in a period of time being carried out the signal summation that adds up, obtain the interference magnitude value; Interference magnitude value and the interference magnitude threshold value of presetting are compared the size of judgement motion artifacts amplitude; During greater than default interference magnitude threshold value, judge that the motion artifacts amplitude is large when the interference magnitude value; During less than default interference magnitude threshold value, judge that the motion artifacts amplitude is little when the interference magnitude value.
A kind ofly eliminate the method that exercise electrocardiogram signal disturbs, wherein when the motion artifacts amplitude of judgement exercise electrocardiogram signal hour, directly obtain exercise electrocardiogram signal.
A kind of method of eliminating the exercise electrocardiogram signal interference, wherein said to exercise electrocardiogram signal and the motion reference signal carry out the step that self adaptation eliminates and also comprise, upgrade according to the weight coefficient of asking the poor result of processing and QRS complex wave Check processing result that weighted sum is processed.
a kind of device of eliminating the exercise electrocardiogram signal interference, comprise the exercise ECG collecting unit that gathers exercise electrocardiogram signal, gather the reference signal collecting unit of motion reference signal, exercise electrocardiogram signal is amplified and low-pass filtering treatment and the amplification and the low-pass filter unit that are connected with the exercise ECG collecting unit, the exercise electrocardiogram signal of simulation is converted to the exercise electrocardiogram signal of numeral and the AD conversion unit that is connected with amplification and low-pass filter unit, the size of the interference magnitude of exercise electrocardiogram signal is judged and the interference magnitude judging unit that is connected with AD conversion unit and according to the size of interference magnitude, exercise electrocardiogram signal and motion reference signal are carried out the self adaptation elimination and eliminate the unit with the signal adaptive that the reference signal collecting unit is connected with the interference magnitude judging unit respectively, wherein, described signal adaptive is eliminated the unit and is comprised exercise electrocardiogram signal shunt module, motion reference signal shunt module, QRS complex wave detection module, the first Postponement module, the second Postponement module, phse conversion module, asks differential mode piece and weighted sum module, described exercise electrocardiogram signal shunt module is used for exercise electrocardiogram signal is divided into the identical exercise electrocardiogram signal output of two-way, described motion reference signal shunt module is used for the motion reference signal is divided into the identical motion reference signal output of two-way, described QRS complex wave detection module is connected with described exercise electrocardiogram signal shunt module, is used for one road exercise electrocardiogram signal is carried out QRS complex wave Check processing, described the first Postponement module is connected with described exercise electrocardiogram signal shunt module, is used for the exercise electrocardiogram signal on another road is carried out delay disposal, described phse conversion module is connected with described motion reference signal shunt module, is used for one tunnel motion reference signal is carried out the phase shift conversion, described the second Postponement module is connected with described motion reference signal shunt module, is used for another road motion reference signal is carried out delay disposal, described weighted sum module is connected with described the second Postponement module and described phse conversion module respectively, is used for that two-way motion reference signal is weighted summation and processes, and obtains to estimate the motion reference signal, the described differential mode piece of asking is connected with described the first Postponement module and weighted sum module respectively, asks poor processing for the exercise electrocardiogram signal after delay disposal with estimating the motion reference signal, obtains the exercise electrocardiogram signal of filtering interfering.
A kind of device of eliminating the exercise electrocardiogram signal interference wherein also comprises between AD conversion unit and interference magnitude judging unit for digital exercise electrocardiogram signal being carried out the filter processing unit of high-pass filtering and low-pass filtering treatment.
A kind of device of eliminating the exercise electrocardiogram signal interference, wherein said interference magnitude judging unit comprises bandpass filtering treatment module, integral processing module and interference magnitude judge module; Described bandpass filtering treatment module is connected with described AD conversion unit, is used for digital exercise electrocardiogram signal is carried out bandpass filtering treatment, obtains the motion artifacts signal; Described integral processing module is connected with described bandpass filtering treatment module, and being used for adds up to sue for peace to the motion artifacts signal in a period of time processes, and obtains the interference magnitude value; Described interference magnitude judge module is connected with described integral processing module, is used for interference magnitude value and the interference magnitude threshold value of presetting are compared the size of judgement motion artifacts amplitude.
A kind of device of eliminating the exercise electrocardiogram signal interference, wherein said signal adaptive are eliminated the unit and are also comprised described right value update module; Described right value update module is connected with described QRS complex wave detection module, described differential mode piece and the described weighted sum module asked respectively, is used for upgrading according to difference signal and the QRS complex wave Check processing result weight coefficient to the weighted sum module.
A kind of device of eliminating the exercise electrocardiogram signal interference, wherein said exercise ECG collecting unit is cardiac diagnosis lead-line; Described reference signal collecting unit is acceleration transducer.
The invention provides a kind of method and apparatus that exercise electrocardiogram signal disturbs of eliminating, by being set, acceleration transducer gathers the human motion reference signal, utilize the baseline drift signal in motion reference signal and exercise ECG waveform to have identical variation tendency, realize the motion reference signal can be adaptive with exercise electrocardiogram signal in the baseline drift interfering signal offset, thereby the exercise electrocardiogram signal after the motion artifacts that is eliminated; Wherein the present invention is compared with the prior art, the advantage that has and beneficial effect are: 1, adopt acceleration transducer, the motion reference signal of Real-time Collection human body utilizes the baseline drift interfering signal in motion reference signal and exercise electrocardiogram signal, can obtain exercise electrocardiogram signal preferably; 2, default interference magnitude threshold value and interference value threshold value compares, and can judge preferably and whether carry out adaptive Interference Cancellation; Accuracy and the stability of Interference Cancellation have been improved; Even 3, a kind of method that exercise electrocardiogram signal disturbs and device eliminated of the present invention is when the motion artifacts amplitude is very large, still can be by the counteracting of exercise electrocardiogram signal and motion reference signal, obtain exercise electrocardiogram signal preferably, with convenient follow-up analyzing and processing for ecg wave form.
Description of drawings
In order to be easy to explanation, the present invention is done to describe in detail by following preferred embodiment and accompanying drawing.
Fig. 1 is a kind of flow chart of eliminating the exercise electrocardiogram signal interference method of the present invention;
Fig. 2 is a kind of minute flow chart of eliminating the exercise electrocardiogram signal interference method of the present invention;
Fig. 3 is a kind of integral module schematic diagram of eliminating the exercise electrocardiogram signal countermeasure set of the present invention;
Fig. 4 is a kind of concrete module diagram of eliminating the exercise electrocardiogram signal countermeasure set of the present invention;
Fig. 5 is a kind of submodule schematic diagram of eliminating the exercise electrocardiogram signal countermeasure set of the present invention;
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.
See also Fig. 1, the invention provides a kind of method that exercise electrocardiogram signal disturbs of eliminating, specifically comprise the steps:
Step 101: gather motion reference signal and exercise electrocardiogram signal;
Detailed process is: gather the exercise electrocardiogram signal of human body and gather the motion reference signal by the reference signal collecting unit by the exercise ECG collecting unit; Wherein this exercise ECG collecting unit is cardiac diagnosis lead-line; This reference signal collecting unit is acceleration transducer.
Step 102: exercise electrocardiogram signal is amplified and low-pass filtering treatment;
Detailed process is: exercise electrocardiogram signal is fixed the amplification of gain, and the exercise electrocardiogram signal after amplifying is carried out low-pass filtering treatment, eliminate the interference of high frequency noise; Wherein this exercise electrocardiogram signal is analogue signal.
Step 103: exercise electrocardiogram signal is carried out analog digital conversion and Filtering Processing;
Detailed process is: exercise electrocardiogram signal is carried out analog-to-digital conversion process, and the exercise electrocardiogram signal that is about to simulation is converted to the exercise electrocardiogram signal of numeral; And the exercise electrocardiogram signal of numeral is carried out high-pass filtering and low-pass filtering treatment, thereby the low frequency in elimination digital moving electrocardiosignal and the interference of high frequency noise.
Step 104: motion artifacts amplitude judgement;
Detailed process is: the exercise electrocardiogram signal to numeral carries out the judgement of motion artifacts width, the size of judgement motion artifacts amplitude; The preferred motion artifacts amplitude of present embodiment determining step is: at first, to carrying out bandpass filtering treatment through the digital moving electrocardiosignal after analog digital conversion and Filtering Processing, obtain the motion artifacts signal, namely be the motion artifacts signal by the exercise electrocardiogram signal after bandpass filtering treatment; Motion artifacts signal in a period of time is carried out integral processing, obtain the interference magnitude value, namely integral processing comprises the motion artifacts signal is carried out the signal summation that adds up, and the result of summation is the interference magnitude value; This interference magnitude value and the interference magnitude threshold value of presetting are compared the size of judgement motion artifacts amplitude; During greater than default interference magnitude threshold value, judge that the motion artifacts amplitude is large when the interference magnitude value; During less than default interference magnitude threshold value, judge that the motion artifacts amplitude is little when the interference magnitude value.
Step 105: exercise electrocardiogram signal and motion reference signal are carried out the self adaptation elimination;
Detailed process is: when the motion artifacts amplitude that judges exercise electrocardiogram signal is large, need exercise electrocardiogram signal and motion reference signal are carried out the self adaptation elimination.
Step 106: obtain final electrocardiosignal;
Detailed process is: when the motion artifacts amplitude hour of judgement exercise electrocardiogram signal, be through the digital moving electrocardiosignal after analog digital conversion and Filtering Processing the final electrocardiosignal of obtaining; When the motion artifacts amplitude that judges exercise electrocardiogram signal was large, exercise electrocardiogram signal and motion reference signal carried out the result after self adaptation is eliminated, and are final electrocardiosignal.
Please refer to Fig. 2, wherein a kind of specific implementation of eliminating the step 105 of the method that exercise electrocardiogram signal disturbs of the present invention is step by step:
Step 151: the motion reference signal that gathers is divided into two-way;
Detailed process is: the motion reference signal that gathers is divided into the identical motion reference signal output of two-way.
Step 152: one tunnel motion reference signal is carried out the phase shift conversion, and delay disposal is carried out on another road;
Detailed process is: one tunnel motion reference signal is carried out the phase shift conversion, and present embodiment is preferably carried out 90 degree phase shift conversion, the motion reference signal after acquisition phase shift conversion to the motion reference signal to this road; Again another road motion reference signal is carried out delay disposal so that this road motion reference signal with carry out the phase shift conversion after the motion reference signal synchronize and export.
Step 153: this two paths of signals is weighted summation processes, obtain to estimate signal;
Detailed process is: two-way motion reference signal is weighted summation processes, obtain to estimate motion reference signal and output.
Step 154: exercise electrocardiogram signal is divided into two-way;
Detailed process is: the exercise electrocardiogram signal that gathers is divided into the identical exercise electrocardiogram signal output of two-way.
Step 155: one road exercise electrocardiogram signal is carried out the QRS complex wave detect, delay disposal is carried out on another road;
Detailed process is: one road exercise electrocardiogram signal is carried out QRS complex wave Check processing, the exercise electrocardiogram signal after obtaining to detect; Again another road exercise electrocardiogram signal is carried out delay disposal, the exercise electrocardiogram signal that makes this road with estimate the motion reference signal and synchronize and export.
Step 156: exercise electrocardiogram signal is asked poor processing with estimating signal, obtain difference signal;
Detailed process is: the exercise electrocardiogram signal after delay disposal is asked poor processing with estimating the motion reference signal, obtain difference signal; Again with this difference signal through after a while stabilized treatment, obtain the exercise electrocardiogram signal of filtering interfering;
Step 157: weight coefficient is upgraded;
Detailed process is: according to the difference signal and the QRS complex wave Check processing result that obtain, the weight coefficient that weighted sum is processed upgrades.
Step 106: obtain final electrocardiosignal;
Detailed process is: obtain the exercise electrocardiogram signal of filtering interfering, this electrocardiosignal is the exercise electrocardiogram signal of final output.
See also Fig. 3, the invention provides a kind of device that exercise electrocardiogram signal disturbs of eliminating, comprising: exercise ECG collecting unit 30, amplification and low-pass filter unit 31, analog digital conversion and filter unit 32, interference magnitude judging unit 33, reference signal collecting unit 34, signal adaptive are eliminated unit 35 and electrocardiosignal acquiring unit 37; Described exercise ECG collecting unit 30 gathers the exercise electrocardiogram signal of human body, and this exercise ECG collecting unit is cardiac diagnosis lead-line; Described amplification and low-pass filter unit 31 are connected with described exercise ECG collecting unit 30, are used for exercise electrocardiogram signal is amplified and low-pass filtering treatment; Described analog digital conversion and filter unit 32 are connected with described amplification and low-pass filter unit 31, are used for exercise electrocardiogram signal is carried out analog-to-digital conversion process, the exercise electrocardiogram signal of simulation are converted to the exercise electrocardiogram signal of numeral; And the exercise electrocardiogram signal of numeral is carried out high-pass filtering and low-pass filtering treatment; Described interference magnitude judging unit 33 is connected with described analog digital conversion and filter unit 32, is used for the size of the interference magnitude of exercise electrocardiogram signal is judged.Described reference signal collecting unit 34 is eliminated unit 35 with signal adaptive and is connected, be used for gathering the motion reference signal, wherein the reference signal collecting unit is generally acceleration transducer, and this acceleration transducer can gather the motion reference signal of simulation usually, also can gather the motion reference signal of numeral; And the motion reference signal demand that gathers simulation is processed through analog-converted, is converted to the digital moving reference signal; Described signal adaptive is eliminated unit 35 and is connected with described interference magnitude judging unit 33, is used for the size according to interference magnitude, and exercise electrocardiogram signal and motion reference signal are carried out the self adaptation elimination; Described electrocardiosignal acquiring unit 37 eliminates unit 35 with described signal adaptive respectively and interference magnitude judging unit 33 is connected, and is used for the size according to interference magnitude, obtains electrocardiosignal.
See also Fig. 4, a kind of device that exercise electrocardiogram signal disturbs of eliminating provided by the invention, wherein amplification comprises amplification module 311 and low-pass filtering treatment module 312 with single 31 yuan of low-pass filtering; Described amplification module 30 is connected with exercise ECG collecting unit 311, is used for the exercise electrocardiogram signal that gathers is fixed the processing and amplifying of gain, and wherein amplification module is preferably amplifier; Described low-pass filtering treatment module 312 is connected with described amplification module 311, is used for the exercise electrocardiogram signal after processing and amplifying is carried out low-pass filtering treatment; Described analog digital conversion and filter unit 32 comprise module converts module 321 and Filtering Processing module 322; Described analog-to-digital conversion module 321 is connected with low-pass filtering treatment module 312, is used for exercise electrocardiogram signal is carried out analog digital conversion, and the skimulated motion electrocardiosignal is converted to the digital moving electrocardiosignal; Described Filtering Processing module 322 is connected with described analog-to-digital conversion module 321, is used for the digital moving electrocardiosignal after conversion is carried out high-pass filtering and low-pass filtering treatment; Wherein carrying out high-pass filtering and low-pass filtering treatment uses high pass filter and low pass filter to process usually, and high pass filter is preferably the lower high pass filter of cut-off frequency, be conducive to like this remove the background signal of slow variation, low pass filter is mainly the bandwidth for the constrained motion electrocardiosignal simultaneously, thereby reduces the noise of exercise electrocardiogram signal; Described interference magnitude judging unit 33 comprises bandpass filtering treatment module 331, integral processing module 332 and interference magnitude judge module 333; Described bandpass filtering treatment module 331 is connected with described analog digital conversion and filter unit 32, is used for obtaining the motion artifacts signal to carrying out bandpass filtering treatment through the digital moving electrocardiosignal after analog digital conversion and Filtering Processing; Described integral processing module 332 is connected with described bandpass filtering treatment module 331, and being used for adds up to sue for peace to the motion artifacts signal in a period of time processes, and obtains the interference magnitude value; Described interference magnitude judge module 333 is connected with described integral processing module 332, is used for interference magnitude value and the interference magnitude threshold value of presetting are compared the size of judgement motion artifacts amplitude; During greater than default interference magnitude threshold value, judge that the motion artifacts amplitude is large when the interference magnitude value; During less than default interference magnitude threshold value, judge that the motion artifacts amplitude is little when the interference magnitude value; When judgement motion artifacts amplitude hour, electrocardiosignal acquiring unit 37 directly obtains exercise electrocardiogram signal.
See also Fig. 5, a kind of device that exercise electrocardiogram signal disturbs of eliminating provided by the invention, wherein signal adaptive elimination unit 35 comprises exercise electrocardiogram signal shunt module 350, motion reference signal shunt module 351, QRS complex wave detection module 352, the first Postponement module 353, the second Postponement module 354, phse conversion module 355, asks differential mode piece 356, weighted sum module 357 and right value update module 358; Described signal adaptive is eliminated the self adaptation elimination that unit 35 is used for carrying out according to motion artifacts amplitude size exercise electrocardiogram signal and motion reference signal, is that the shutdown signal self adaptation is eliminated unit 35 when judgement motion artifacts amplitude is little; When judgement motion artifacts amplitude is greatly that the enabling signal self adaptation is eliminated unit 35; Described exercise electrocardiogram signal shunt module 350 is used for exercise electrocardiogram signal is divided into the identical exercise electrocardiogram signal output of two-way; Described motion reference signal shunt module 351 is used for the motion reference signal is divided into the identical motion reference signal output of two-way; Described QRS complex wave detection module 352 is connected with described exercise electrocardiogram signal shunt module 350, is used for one road exercise electrocardiogram signal is carried out QRS complex wave Check processing; Described the first Postponement module 353 is connected with described exercise electrocardiogram signal shunt module 350, is used for the exercise electrocardiogram signal on another road is carried out delay disposal; Described phse conversion module 355 is connected with described motion reference signal shunt module 351, is used for one tunnel motion reference signal is carried out the phase shift conversion; Described the second Postponement module 354 is connected with described motion reference signal shunt module 351, is used for another road motion reference signal is carried out delay disposal, and the motion reference signal after making this road motion reference signal and carrying out the phase shift conversion is synchronizeed and exported; Described weighted sum module 357 is connected with described the second Postponement module 354 and described phse conversion module 355 respectively, is used for that two-way motion reference signal is weighted summation and processes, and obtains to estimate the motion reference signal; The described differential mode piece 356 of asking is connected with described the first Postponement module 353 and weighted sum module 357 respectively, be used for after delay disposal exercise electrocardiogram signal with estimate the motion reference signal and ask poor and process, obtain difference signal, export after stabilized treatment after a while; Described right value update module 358 is connected with described QRS complex wave detection module 352, described differential mode piece 356 and the described weighted sum module 357 asked respectively, is used for upgrading according to difference signal and the QRS complex wave Check processing result weight coefficient to the weighted sum module.
Wherein, exercise electrocardiogram signal comprises QRS wave band and non-QRS wave band, carries out Check processing at the QRS wave band by QRS complex wave detection module 352; And QRS complex wave detection module 352 has identical delay with the first Postponement module 353, and namely the exercise electrocardiogram signal on this road can be exported with synchronizeing by the electrocardiosignal of the first Postponement module 353.Then the exercise electrocardiogram signal after processing through QRS complex wave detection module 352 exports right value update module 358 to; And at non-QRS wave band, right value update module 358 is obtained difference signal, then with obtain QRS complex wave Check processing result, weight coefficient is upgraded, so that better pursuit movement interfering signal.
The invention provides a kind of elimination exercise electrocardiogram signal interference method and device, by being set, acceleration transducer gathers the human motion reference signal, utilize the baseline drift signal in motion reference signal and exercise ECG waveform to have identical variation tendency, realize the motion reference signal can be adaptive with exercise electrocardiogram signal in the baseline drift interfering signal offset, thereby the exercise electrocardiogram signal after the motion artifacts that is eliminated; Wherein the present invention is compared with the prior art, the advantage that has and beneficial effect are: 1, adopt acceleration transducer, the motion reference signal of Real-time Collection human body utilizes the baseline drift interfering signal in motion reference signal and exercise electrocardiogram signal, can obtain exercise electrocardiogram signal preferably; 2, default interference magnitude threshold value and interference value threshold value compares, and can judge preferably and whether carry out adaptive Interference Cancellation; Accuracy and the stability of Interference Cancellation have been improved; Even 3, a kind of method that exercise electrocardiogram signal disturbs and device eliminated of the present invention is when the motion artifacts amplitude is very large, still can be by the counteracting of exercise electrocardiogram signal and motion reference signal, obtain exercise electrocardiogram signal preferably, with convenient follow-up analyzing and processing for ecg wave form.
The above is only 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, is equal to and replaces and improvement etc., within all should being included in protection scope of the present invention.
Claims (10)
1. eliminate the method that exercise electrocardiogram signal disturbs for one kind, comprise the steps:
Gather exercise electrocardiogram signal and motion reference signal;
To amplifying and low-pass filtering treatment of the exercise electrocardiogram signal fixed gain that gathers;
Exercise electrocardiogram signal after amplification and low-pass filtering treatment is carried out analog-to-digital conversion process, obtain the exercise electrocardiogram signal of numeral;
Exercise electrocardiogram signal to numeral carries out the judgement of motion artifacts width, the size of judgement motion artifacts amplitude;
According to the size of motion artifacts amplitude, exercise electrocardiogram signal and motion reference signal are carried out the self adaptation elimination, obtain the exercise electrocardiogram signal of filtering interfering;
It is characterized in that, when judgement motion artifacts amplitude is large, exercise electrocardiogram signal and reference signal are carried out the self adaptation elimination; Described to exercise electrocardiogram signal and the motion reference signal carry out the step that self adaptation eliminates and comprise: the motion reference signal that gathers is divided into the identical motion reference signal output of two-way; Motion reference signal to one tunnel carries out the phase shift conversion, the motion reference signal after acquisition phase shift conversion; Another road motion reference signal is carried out delay disposal, and the motion reference signal after making this road motion reference signal and carrying out the phase shift conversion is synchronizeed and is exported; Again this two-way motion reference signal is weighted summation and processes, obtain to estimate the motion reference signal; The exercise electrocardiogram signal that gathers is divided into the identical exercise electrocardiogram signal output of two-way; One road exercise electrocardiogram signal is carried out QRS complex wave Check processing; Another road exercise electrocardiogram signal is carried out delay disposal, the exercise electrocardiogram signal that makes this road with estimate the motion reference signal and synchronize and export; Exercise electrocardiogram signal after delay disposal is asked poor processing with estimating the motion reference signal, obtain the exercise electrocardiogram signal of filtering interfering.
2. a kind of method that exercise electrocardiogram signal disturbs of eliminating according to claim 1, is characterized in that, after obtaining the exercise electrocardiogram signal of numeral, comprises that also the exercise electrocardiogram signal to mathematics carries out high-pass filtering processing and low-pass filtering treatment.
3. a kind of method that exercise electrocardiogram signal disturbs of eliminating according to claim 1 and 2, is characterized in that, described size to the motion artifacts width judges and comprises digital exercise electrocardiogram signal is carried out bandpass filtering treatment, obtains the motion artifacts signal; The motion artifacts signal in a period of time being carried out the signal summation that adds up, obtain the interference magnitude value; Interference magnitude value and the interference magnitude threshold value of presetting are compared the size of judgement motion artifacts amplitude; During greater than default interference magnitude threshold value, judge that the motion artifacts amplitude is large when the interference magnitude value; During less than default interference magnitude threshold value, judge that the motion artifacts amplitude is little when the interference magnitude value.
4. a kind of method that exercise electrocardiogram signal disturbs of eliminating according to claim 1, is characterized in that, when the motion artifacts amplitude of judgement exercise electrocardiogram signal hour, directly obtains exercise electrocardiogram signal.
5. a kind of method that exercise electrocardiogram signal disturbs of eliminating according to claim 1, it is characterized in that, described to exercise electrocardiogram signal and the motion reference signal carry out the step that self adaptation eliminates and also comprise, upgrade according to the weight coefficient of asking the poor result of processing and QRS complex wave Check processing result that weighted sum is processed.
6. device of realizing elimination exercise electrocardiogram signal interference method claimed in claim 1, comprise the exercise ECG collecting unit that gathers exercise electrocardiogram signal, gather the reference signal collecting unit of motion reference signal, exercise electrocardiogram signal is amplified and low-pass filtering treatment and the amplification and the low-pass filter unit that are connected with the exercise ECG collecting unit, the exercise electrocardiogram signal of simulation is converted to the exercise electrocardiogram signal of numeral and the AD conversion unit that is connected with amplification and low-pass filter unit, the size of the interference magnitude of exercise electrocardiogram signal is judged and the interference magnitude judging unit that is connected with AD conversion unit and according to the size of interference magnitude, exercise electrocardiogram signal and motion reference signal are carried out the self adaptation elimination and eliminate the unit with the signal adaptive that the reference signal collecting unit is connected with the interference magnitude judging unit respectively, it is characterized in that,
Described signal adaptive is eliminated the unit and is comprised exercise electrocardiogram signal shunt module, motion reference signal shunt module, QRS complex wave detection module, the first Postponement module, the second Postponement module, phse conversion module, asks differential mode piece and weighted sum module; Described exercise electrocardiogram signal shunt module is used for exercise electrocardiogram signal is divided into the identical exercise electrocardiogram signal output of two-way; Described motion reference signal shunt module is used for the motion reference signal is divided into the identical motion reference signal output of two-way; Described QRS complex wave detection module is connected with described exercise electrocardiogram signal shunt module, is used for one road exercise electrocardiogram signal is carried out QRS complex wave Check processing; Described the first Postponement module is connected with described exercise electrocardiogram signal shunt module, is used for the exercise electrocardiogram signal on another road is carried out delay disposal; Described phse conversion module is connected with described motion reference signal shunt module, is used for one tunnel motion reference signal is carried out the phase shift conversion; Described the second Postponement module is connected with described motion reference signal shunt module, is used for another road motion reference signal is carried out delay disposal; Described weighted sum module is connected with described the second Postponement module and described phse conversion module respectively, is used for that two-way motion reference signal is weighted summation and processes, and obtains to estimate the motion reference signal; The described differential mode piece of asking is connected with described the first Postponement module and weighted sum module respectively, asks poor processing for the exercise electrocardiogram signal after delay disposal with estimating the motion reference signal, obtains the exercise electrocardiogram signal of filtering interfering.
7. a kind of device that exercise electrocardiogram signal disturbs of eliminating according to claim 6, it is characterized in that, also comprise between AD conversion unit and interference magnitude judging unit for digital exercise electrocardiogram signal being carried out the filter processing unit of high-pass filtering and low-pass filtering treatment.
8. according to claim 6 or 7 described a kind of devices that exercise electrocardiogram signal disturbs of eliminating, is characterized in that, described interference magnitude judging unit comprises bandpass filtering treatment module, integral processing module and interference magnitude judge module; Described bandpass filtering treatment module is connected with described AD conversion unit, is used for digital exercise electrocardiogram signal is carried out bandpass filtering treatment, obtains the motion artifacts signal; Described integral processing module is connected with described bandpass filtering treatment module, and being used for adds up to sue for peace to the motion artifacts signal in a period of time processes, and obtains the interference magnitude value; Described interference magnitude judge module is connected with described integral processing module, is used for interference magnitude value and the interference magnitude threshold value of presetting are compared the size of judgement motion artifacts amplitude.
9. a kind of device that exercise electrocardiogram signal disturbs of eliminating according to claim 6, is characterized in that, described signal adaptive is eliminated the unit and also comprised described right value update module; Described right value update module is connected with described QRS complex wave detection module, described differential mode piece and the described weighted sum module asked respectively, is used for upgrading according to difference signal and the QRS complex wave Check processing result weight coefficient to the weighted sum module.
10. a kind of device that exercise electrocardiogram signal disturbs of eliminating according to claim 6, is characterized in that, described exercise ECG collecting unit is cardiac diagnosis lead-line; Described reference signal collecting unit is acceleration transducer.
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