CN103239222A - Electrocardio signal acquisition device and method - Google Patents
Electrocardio signal acquisition device and method Download PDFInfo
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- CN103239222A CN103239222A CN201310134282XA CN201310134282A CN103239222A CN 103239222 A CN103239222 A CN 103239222A CN 201310134282X A CN201310134282X A CN 201310134282XA CN 201310134282 A CN201310134282 A CN 201310134282A CN 103239222 A CN103239222 A CN 103239222A
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- 238000012545 processing Methods 0.000 claims abstract description 31
- 238000001514 detection method Methods 0.000 claims abstract description 25
- 238000006243 chemical reaction Methods 0.000 claims abstract description 13
- 230000003321 amplification Effects 0.000 claims abstract description 11
- 238000003199 nucleic acid amplification method Methods 0.000 claims abstract description 11
- 230000000661 pacemaking effect Effects 0.000 claims description 47
- 230000000747 cardiac effect Effects 0.000 claims description 14
- 238000003745 diagnosis Methods 0.000 claims description 14
- 230000003750 conditioning effect Effects 0.000 claims description 7
- 230000008878 coupling Effects 0.000 claims description 5
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- 230000004899 motility Effects 0.000 description 4
- 230000002093 peripheral effect Effects 0.000 description 4
- 230000002452 interceptive effect Effects 0.000 description 3
- 230000006793 arrhythmia Effects 0.000 description 2
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- A61B5/24—Detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof
- A61B5/316—Modalities, i.e. specific diagnostic methods
- A61B5/318—Heart-related electrical modalities, e.g. electrocardiography [ECG]
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Abstract
An electrocardio signal acquisition device comprises an electrocardio guiding couplet, a front integration module, and a main control module. The electrocardio guiding couplet is used for guiding detected electrocardio signals into the acquisition device, the front integration module is used for subjecting the electrocardo signals to impedance matching, amplification, pacemaker detection, guiding couplet shedding and analogue-to-digital conversion and the like, and the main control module is used for controlling the front integration module, and subjecting the electrocardo signals to digital filtering and dominant point recognition according to processing signals of the front integration module; and the front integration module is an ASIC (application-specific integrated circuit). The invention further provides an electrocardio signal acquisition method.
Description
Technical field
The present invention relates to a kind of harvester and acquisition method of electrocardiosignal, particularly, the present invention relates to a kind of harvester and acquisition method that has adopted the electrocardiosignal of ASIC special IC.
Background technology
Electrocardiogram is one of most important bio-electrical information of human body.Electrocardiosignal is a kind of periodic electricity physiological signal, passes to body surface through tissue, produces potential difference at body surface.Clinically, can come out and depict as curve with the potential difference measurement that various instrument and equipments produce body surface, to form electrocardiogram.The electrocardiosignal measuring method of body surface normally adopts the electrode that is attached to the body surface ad-hoc location to obtain faint electrocardiosignal, and after by cardiac diagnosis lead-line above-mentioned faint electrocardiosignal being sent into the electrocardio pre-process circuit and is handled, be converted into digital signal through the A/D digitized, and send into MCU, carry out identification and the processing of Characteristics of electrocardiogram point by MCU, the electrocardiosignal after will handling and identify at last sends host computer to and shows.
Traditional electrocardiogram acquisition system and device have adopted discrete components and parts that electrocardiosignal is gathered, and have comprised that mainly prime holding circuit, electric knife suppress circuit, front end impedance matching circuit, identification circuit, main amplifying circuit, pace-making testing circuit, high-pass filtering circuit, second amplifying circuit, low-pass filter circuit, driven-right-leg circuit, A/D change-over circuit and the MCU circuit composition of coming off leads.Because the discrete component that adopts is realized, inevasiblely used a large amount of integrated circuits, components and parts such as resistance and electric capacity, cause the volume of this device big, the power consumption height, design shortcomings such as complicated motility is low, because integrated circuit, the diversity of resistance and capacitance component individuality, it is (typical in common mode rejection ratio to have caused each parameter of leading of electrocardiogram and index to have diversity, input impedance etc.), resistance and the excessive variation that also causes front-end filtering circuit filtering characteristic easily of the capacitance difference opposite sex, filter Electrocardiographic useful signal, lost the diagnostic value of ECG signal.
Summary of the invention
In view of this, be necessary to provide a kind of electrocardiogram signal acquisition device with degree of precision and signal to noise ratio.
In addition, also be necessary to provide a kind of corresponding ecg signal acquiring method.
A kind of electrocardiogram signal acquisition device comprises:
Cardiac diagnosis lead is used for importing the electrocardiosignal that detects;
Preposition integration module, be used for to described electrocardiosignal carry out impedance matching, amplification, pace-making detect, lead come off, processing such as mould/number conversion;
Main control module is used for the described preposition integration module of control, and according to the processing signals of described preposition integration module described electrocardiosignal is carried out digital filtering, characteristic point identification;
It is characterized in that: described preposition integration module is application-specific integrated circuit ASIC.
Described preposition integration module comprises:
Impedance matching unit is used for information source internal impedance and the subsequent conditioning circuit load impedance of described electrocardiosignal are carried out impedance matching;
Amplifying unit is used for amplifying through the electrocardiosignal of described impedance matching unit coupling.
Described preposition integration module comprises the pace-making detecting unit, is used for that described electrocardiosignal is carried out pace-making and detects processing, and provide the pace-making detection signal according to described pace-making detection processing to described main control module.
Described preposition integration module comprises the detecting unit that comes off that leads, be used for detections that come off of leading of described electrocardiosignal, and according to described lead to come off detect processing and provide the detection signal that comes off that leads to described main control module.
Described digital filtering comprises that low-pass filtering treatment, high-pass filtering are handled and/or the trap of 50/60HZ is handled.
A kind of ecg signal acquiring method comprises:
The preposition integration module of initialization and depositor thereof;
Receive electrocardiosignal;
With described preposition integration module to described electrocardiosignal carry out impedance matching, amplification, pace-making detect, lead come off, processing such as mould/number conversion;
Processing according to described preposition integration module is carried out digital filtering, characteristic point identification to described electrocardiosignal;
It is characterized in that: described preposition integration module is application-specific integrated circuit ASIC.
Described with described preposition integration module to described electrocardiosignal carry out impedance matching, amplification, pace-making detect, lead come off, the step of processing such as mould/number conversion comprises:
Information source internal impedance and the subsequent conditioning circuit load impedance of described electrocardiosignal are carried out impedance matching;
To amplifying through the electrocardiosignal of described impedance matching unit coupling.
Described with described preposition integration module to described electrocardiosignal amplify, pace-making detects, lead come off, the step of processings such as mould/number conversion further comprises: described electrocardiosignal is carried out pace-making detects and handle, and detect according to described pace-making and to handle generation pace-making detection signal.
Described with described preposition integration module to described electrocardiosignal amplify, pace-making detects, lead come off, the step of processings such as mould/number conversion further comprises: to detections that come off of leading of described electrocardiosignal, and according to described lead to come off detect the processing generation detection signal that comes off that leads.
Described digital filtering comprises that low-pass filtering treatment, high-pass filtering are handled and/or the trap of 50/60HZ is handled.
Electrocardiogram signal acquisition device of the present invention and acquisition method have reduced the volume of electrocardiogram signal acquisition device by the mode of the alternative traditional components and parts of integrated special IC, have reduced the power consumption of system, can also reduce the design cost of system simultaneously.In addition, electrocardiogram signal acquisition device of the present invention adopts the mode of digital filtering filtering interfering to increase reliability and the motility of system design, has avoided causing owing to resistance and electric capacity difference the distortion of the inconsistent electrocardiosignal that causes of filtering characteristic.
Description of drawings
Fig. 1 is the modular structure figure of the electrocardiogram signal acquisition device of the embodiment of the invention;
Fig. 2 is the circuit diagram that electric knife shown in Figure 1 suppresses a kind of embodiment of module 106;
Fig. 3 is the modular structure figure of a kind of embodiment of preposition integration module 108 shown in Figure 1;
Fig. 4 is the flow chart of the ecg signal acquiring method of embodiment of the present invention.
The specific embodiment
As shown in Figure 1, the electrocardiogram signal acquisition device 10 of one embodiment of the present invention comprises that cardiac diagnosis lead 102, protection module 104, electric knife suppress module 106, preposition integration module 108, main control module 110, interface module 112 and power module 114.
The electrode that cardiac diagnosis lead 102 is used for linking to each other with object body surface to be detected links to each other, so that electrode is introduced described electrocardiogram signal acquisition device 10 to carry out subsequent treatment by the electrocardiosignal that body surface was detected.
Electric knife suppresses module 106 and links to each other with protection module 104, is used for filtering the high frequency clutter that brings for the influence of electrocardiosignal owing to other surgical apparatuses such as electric knifes of the electrocardiosignal of gathering.Shown in Figure 2 is the circuit diagram that electric knife suppresses module 106 in a kind of embodiment.In this embodiment, electric knife suppresses module 106 and has comprised two rank RC filter circuits, and wherein the capacitance of the resistance value of R1 and R2, C1 and C2 system is adapted to the waveform characteristic of electric knife high-frequency signal and arranges.In other optional embodiments, it can also be other filtering modes that are adapted to electric knife high frequency waves characteristic that this electric knife suppresses module 106.
As shown in Figure 3, a kind of preposition integration module 08 of embodiment comprises impedance matching unit 302, right lower limb driver element 304, main amplifying unit 306, pace-making detecting unit 308, detecting unit 310, secondary amplifying unit 312 and the A/D converter 314 of coming off leads.
Impedance matching unit 302 suppresses module 106 with electric knife and links to each other, and is used for carrying out corresponding impedance matching according to information source internal impedance and the subsequent conditioning circuit load impedance of described electrocardiosignal, and the load impedance of described electrocardiosignal is mated.Electrocardiosignal through impedance matching unit 302 coupling bufferings is delivered to right lower limb driver element 304 and main amplifying unit 306.Right lower limb driver element 304 is recycled to object to be detected with the electrocardiosignal that receives, and is generally right lower limb, thereby can eliminates because object to be detected disturbs as the power frequency that the interfering signal reception sources brings.Main amplifying unit 306 is used for the electrocardiosignal that impedance matching is finished is led amplification.The electrocardiosignal of having carried out main amplification through main amplifying unit 306 divide three the tunnel deliver to pace-making detecting unit 308 respectively, detecting unit 310 and the secondary amplifying unit 312 of coming off leads.Pace-making detecting unit 308 is used for the pace-making feature of electrocardiosignal is detected, and whether the detecting unit 310 that comes off of leading comes off from object to be detected for detection of cardiac diagnosis lead 102.Secondary amplifying unit 312 is used for that the electrocardiosignal of having passed through main amplification is carried out secondary and amplifies.Described pace-making detecting unit 308, described lead to come off offer main control module 110 after detecting unit 310, described secondary amplifying unit 312 handled electrocardiosignaies all are converted to digital signal by A/D converter 314.
Example ground, described main control module 110 can determine whether to occur the pace-making state according to the pace-making detection signal, and goes pacing signal to handle accordingly for described electrocardiosignal when determining the pace-making state to have occurred.Example ground, described main control module 110 also carries out the identification of QRS ripple, ST section and arrhythmia by difference threshold method, Wavelet Transform, neutral net method of identification, template matching method etc. to described electrocardiosignal.
The operation principle of this electrocardiogram signal acquisition device 10 is: at first initialization main control module 110 and each peripheral hardware resource after powering on, described main control module 110 be by the interface of described special use, as spi bus, and the internal register of the described preposition integration module 108 of initialization.In optional embodiment, described internal register has comprised cardiac diagnosis lead, the pace-making depositor such as detection that comes off that detects, leads.After initialization was finished, described main control module 110 waited for that described preposition integration module 108 returns handshake data.Then, described main control module 110 beginnings regularly receive the packet that described preposition integration module 108 sends.Example ground, described packet can comprise electrocardiogram (ECG) data, pace-making status data and the status data etc. that comes off that leads.Described main control module 110 has judged whether to lead according to the data of described packet and has come off and the pace-making status data.If defining to lead comes off, 110 of described main control modules generate and send the sign that comes off that leads; If define the pace-making state, 110 of main control modules go pacing signal to handle to the electrocardiosignal that receives, and after finishing dealing with, carry out the filtering of electrocardiosignal and the identification of characteristic point, send the data finish dealing with at last, and offer host computer by interface module 112 and show.
The electrocardiogram signal acquisition device of above embodiment according to the present invention, substitute the mode of traditional components and parts by integrated special IC, reduce the volume of electrocardiogram signal acquisition device, reduced the power consumption of system, can also reduce the design cost of system simultaneously.Experiment shows that module volume, power consumption and the cost of the electrocardiogram signal acquisition device of above embodiment can reduce 1/2,2/5 and 1/3 respectively according to the present invention.By the electrocardiogram signal acquisition device of the above embodiment of the present invention, make the microminiaturization of ecg signal acquiring and portability become possibility.Simultaneously, because integrated electrocardiogram signal acquisition device has reduced the use of integrated circuit, resistance and electric capacity, improved each EGC parameter index consistency of leading.In addition, electrocardiogram signal acquisition device of the present invention adopts the digital filter filtering interfering, has increased reliability and the motility of system design, has avoided causing owing to resistance and electric capacity difference the distortion of the inconsistent electrocardiosignal that causes of filtering characteristic.
Figure 4 shows that the flow process of the ecg signal acquiring method of one embodiment of the present invention, below in conjunction with electrocardiogram signal acquisition device shown in Figure 1 described ecg signal acquiring method described that described ecg signal acquiring method comprises:
Step 402, each peripheral hardware of initialization main control module 110 and main control module 110.
Step 404, main control module 110 sends initialization command to preposition integration module 108, with the described preposition integration module 108 of initialization.Example ground, the process of the described preposition integration module 108 of initialization comprises its inner impedance matching unit 302 of initialization, right lower limb driver element 304, main amplifying unit 306, pace-making detecting unit 308, detecting unit 310, the secondary amplifying unit 312 etc. of coming off lead.
Step 406 is waited for the handshake data that receives described preposition integration module 108.
Step 408 judges according to the handshake data that preposition integration module 108 returns whether described preposition integration module normally starts.If normally do not start, then described main control module 110 reconfigures primary data and sends primary data to described preposition integration module 108, with the described preposition integration module 108 of initialization.
Step 410, cardiac diagnosis lead 102 receives the electrocardiosignal of object to be detected.
Step 412,104 pairs of described electrocardiosignaies of described protection module protect processing, 106 pairs of described electrocardiosignaies of described electric knife inhibition module to carry out electric knife and suppress processing.The high-pressure section that is used for removing the electrocardiosignal of introducing is handled in protection, in order to avoid high-voltage signal wherein is introduced into the damage that causes subsequent conditioning circuit in the subsequent module.A kind of possible situation is that when carrying out defibrillation for object to be detected, object to be detected will be introduced high pressure, needs described protection to handle the protection that removes high pressure.The high frequency clutter that electric knife suppress to handle be used for filters the electrocardiosignal of gathering because other surgical apparatuses such as electric knife bring for the influence of electrocardiosignal.
Step 414,108 pairs of electrocardiosignaies of preposition integration module are carried out pre-process.Example ground, described pre-process comprise that impedance matching, amplification, pace-making detect, detection, the mould/number conversion etc. of coming off of leading.Wherein, preposition integration module is application-specific integrated circuit ASIC (Application Specific Integrated Circuit).
Step 416, main control module 110 are handled leading of the gained detection signal that comes off according to preposition integration module 108 and are judged whether cardiac diagnosis lead 102 comes off.
Step 418 if main control module 110 determines that in the judged result of step 416 cardiac diagnosis lead 102 comes off, then sends the cardiac diagnosis lead Status Flag that comes off, and offers host computer by interface module 112 and shows.
Step 420, if the judged result of main control module 110 determines that cardiac diagnosis lead 102 does not come off, then the pace-making status signal of handling gained according to preposition integration module 108 judges whether to exist the pace-making state.
Step 422, if main control module 110 determines to exist the pace-making state in the judged result of step 416, set pace-making sign then, and go pacing signal to handle to carrying out described electrocardiosignal.
Step 424,110 pairs of electrocardiosignaies of main control module are carried out the identification of filtering and characteristic point, and the generating feature data.Alternatively, described Filtering Processing comprises that mainly low-pass filtering treatment, high-pass filtering are handled and the trap of 50/60HZ is handled.In optional embodiment, described low-pass filtering can adopt 2 rank Butterworth filters to carry out the filtering that cut-off frequency is 20HZ, 40HZ and 150HZ; Described high pass filter can adopt 2 rank Chebyshev filters to carry out the filtering of 0.05HZ, 0.5HZ and 1HZ; Described 50/60HZ trap is used for eliminating better filtering gibbs concussion afterwards, and example ground can adopt comb filtering to carry out described trap and handle.Example ground, described characteristic point identification is by difference threshold method, Wavelet Transform, neutral net method of identification, template matching method etc. described electrocardiosignal to be carried out the identification of QRS ripple, ST section and arrhythmia.
Step 426, electrocardiosignal, characteristic point data that described main control module 110 is sent show.
The ecg signal acquiring method of above embodiment according to the present invention by the mode of the alternative traditional components and parts of integrated circuit, has reduced the volume of ecg signal acquiring system, has reduced the power consumption of system, can also reduce the design cost of system simultaneously.Experiment shows that module volume, power consumption and the cost of the electrocardiogram signal acquisition device of above embodiment can reduce 1/2,2/5 and 1/3 respectively according to the present invention.By the ecg signal acquiring method of the above embodiment of the present invention, make the microminiaturization of ecg signal acquiring and portability become possibility.Simultaneously, because integrated ecg signal acquiring method has reduced the use of decentralized processing, improved each EGC parameter index consistency of leading.In addition, ecg signal acquiring method of the present invention adopts digital filtering to increase reliability and the motility of system, has avoided causing owing to resistance and electric capacity difference the distortion of the inconsistent electrocardiosignal that causes of filtering characteristic.
The above embodiment has only expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to claim of the present invention.Should be pointed out that for the person of ordinary skill of the art without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (10)
1. electrocardiogram signal acquisition device comprises:
Cardiac diagnosis lead is used for importing the electrocardiosignal that detects;
Preposition integration module, be used for to described electrocardiosignal carry out impedance matching, amplification, pace-making detect, lead come off, processing such as mould/number conversion;
Main control module is used for the described preposition integration module of control, and according to the processing signals of described preposition integration module described electrocardiosignal is carried out digital filtering, characteristic point identification;
It is characterized in that: described preposition integration module is application-specific integrated circuit ASIC.
2. electrocardiogram signal acquisition device as claimed in claim 1, it is characterized in that: described preposition integration module comprises:
Impedance matching unit is used for information source internal impedance and the subsequent conditioning circuit load impedance of described electrocardiosignal are carried out impedance matching;
Amplifying unit is used for amplifying through the electrocardiosignal of described impedance matching unit coupling.
3. electrocardiogram signal acquisition device as claimed in claim 2, it is characterized in that: described preposition integration module comprises the pace-making detecting unit, be used for that described electrocardiosignal is carried out pace-making and detect processing, and provide the pace-making detection signal according to described pace-making detection processing to described main control module.
4. electrocardiogram signal acquisition device as claimed in claim 2, it is characterized in that: described preposition integration module comprises the detecting unit that comes off that leads, be used for detections that come off of leading of described electrocardiosignal, and according to described lead to come off detect processing and provide the detection signal that comes off that leads to described main control module.
5. electrocardiogram signal acquisition device as claimed in claim 1 is characterized in that: described digital filtering comprises that low-pass filtering treatment, high-pass filtering are handled and/or the trap of 50/60HZ is handled.
6. ecg signal acquiring method comprises:
The preposition integration module of initialization and depositor thereof;
Receive electrocardiosignal;
With described preposition integration module to described electrocardiosignal amplify, pace-making detects, lead come off, processing such as mould/number conversion;
Processing according to described preposition integration module is carried out digital filtering, characteristic point identification to described electrocardiosignal;
It is characterized in that: described preposition integration module is application-specific integrated circuit ASIC.
7. ecg signal acquiring method as claimed in claim 6 is characterized in that: described with described preposition integration module to described electrocardiosignal amplify, pace-making detects, lead come off, the step of processing such as mould/number conversion comprises:
Information source internal impedance and the subsequent conditioning circuit load impedance of described electrocardiosignal are carried out impedance matching;
To amplifying through the electrocardiosignal of described impedance matching unit coupling.
8. electrocardiogram signal acquisition device as claimed in claim 7, it is characterized in that: described with described preposition integration module to described electrocardiosignal carry out impedance matching, amplification, pace-making detect, lead come off, the step of processings such as mould/number conversion further comprises: described electrocardiosignal is carried out pace-making detects and handle, and detect according to described pace-making and to handle generation pace-making detection signal.
9. electrocardiogram signal acquisition device as claimed in claim 7, it is characterized in that: described with described preposition integration module to described electrocardiosignal carry out impedance matching, amplification, pace-making detect, lead come off, the step of processings such as mould/number conversion further comprises: to detections that come off of leading of described electrocardiosignal, and according to described lead to come off detect the processing generation detection signal that comes off that leads.
10. ecg signal acquiring method as claimed in claim 6 is characterized in that: described digital filtering comprises that low-pass filtering treatment, high-pass filtering are handled and/or the trap of 50/60HZ is handled.
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| CN201310134282XA CN103239222A (en) | 2013-04-17 | 2013-04-17 | Electrocardio signal acquisition device and method |
| PCT/CN2013/082024 WO2014169550A1 (en) | 2013-04-17 | 2013-08-22 | Electrocardiograph signal collecting device and collecting method |
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