CN106725431A - One kind is used for ecg signal acquiring processing system - Google Patents
One kind is used for ecg signal acquiring processing system Download PDFInfo
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- CN106725431A CN106725431A CN201611238537.7A CN201611238537A CN106725431A CN 106725431 A CN106725431 A CN 106725431A CN 201611238537 A CN201611238537 A CN 201611238537A CN 106725431 A CN106725431 A CN 106725431A
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- 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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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/24—Detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof
- A61B5/316—Modalities, i.e. specific diagnostic methods
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/72—Signal processing specially adapted for physiological signals or for diagnostic purposes
- A61B5/7203—Signal processing specially adapted for physiological signals or for diagnostic purposes for noise prevention, reduction or removal
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/72—Signal processing specially adapted for physiological signals or for diagnostic purposes
- A61B5/7225—Details of analog processing, e.g. isolation amplifier, gain or sensitivity adjustment, filtering, baseline or drift compensation
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/72—Signal processing specially adapted for physiological signals or for diagnostic purposes
- A61B5/7235—Details of waveform analysis
- A61B5/725—Details of waveform analysis using specific filters therefor, e.g. Kalman or adaptive filters
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
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- Heart & Thoracic Surgery (AREA)
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- Computer Vision & Pattern Recognition (AREA)
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- Psychiatry (AREA)
- Power Engineering (AREA)
- Cardiology (AREA)
- Measurement And Recording Of Electrical Phenomena And Electrical Characteristics Of The Living Body (AREA)
Abstract
It is used for ecg signal acquiring processing system the invention discloses one kind, including buffer stage, pre-differential amplifier circuit, 50HZ trap circuits, voltage amplification module, low-pass filter circuit, level adjustment circuit, isolation circuit, digital signal processor, interface module and display module, buffer stage output end is sequentially connected pre-differential amplifier circuit, 50HZ trap circuits, voltage amplification module, low-pass filter circuit, level adjustment circuit, isolation circuit, digital signal processor, interface module and display module, buffer stage input connection input signal.Ecg signal acquiring processing system of the present invention optimizes design to whole system, can overcome some difficulties that electrocardiosignal is commonly encountered in extracting, and preamplifier is had common-mode rejection ratio higher such that it is able to the electrocardiosignal that preferably amplification detection goes out.
Description
Technical field
It is specifically a kind of to be used for ecg signal acquiring processing system the present invention relates to a kind of signal processing system.
Background technology
Electrocardiosignal be by cardiomotility produce and be present in all the time central nervous system autonomous potential activity, contain
There is abundant heart activity information, be cardiac studies, physiological Study, the important means of clinical heart medical diagnosis on disease.By to the heart
Electric signal is recorded, and to provide the foundation of clinical data and diagnosis, therefore the extraction of electrocardiosignal has very important facing
Bed meaning.
Current ecg signal acquiring treatment is primarily present problems with：Electrocardiosignal is very faint, and typically only 50 μ V are left
The right side, amplitude range is 5 μ V~100 μ V, therefore it requires that gain amplifier is more much higher than general instrument；Electrocardiosignal frequency is low,
Its scope is general, and in 0.5Hz~35Hz, this causes that the selection of the low-frequency cutoff of amplifier is extremely difficult, when dry by spike
Disturb or lead switch when, easily there is clogging in amplifier；There is the powerful background such as power frequency 50Hz and polarizing voltage
Interference, wherein power frequency 50Hz interference is main to be existed in common mode form, and amplitude is larger, so ecg signal amplifier must have very
Common-mode rejection ratio high, and the presence of polarizing voltage interference prevents the forward gain of ecg amplifier from excessive；Due to human body
It is a high internal resistance signal source, internal resistance is up to tens kilo-ohms or even hundreds of kilo-ohms, and its internal impedance is both easy to change, again may be used
Each branch road of energy is uneven, so, the input impedance of ecg signal amplifier must be more than several megaohms.
It can be seen that, to design high-quality ecg signal acquiring processing system, it is desirable to solve the variety of problems of the above, this makes
There is bigger difficulty in the design for obtaining ecg signal acquiring processing system.
The content of the invention
It is used for ecg signal acquiring processing system it is an object of the invention to provide one kind, with solving above-mentioned background technology
The problem of proposition.
To achieve the above object, the present invention provides following technical scheme：
One kind is used for ecg signal acquiring processing system, including buffer stage, pre-differential amplifier circuit, 50HZ traps electricity
Road, voltage amplification module, low-pass filter circuit, level adjustment circuit, isolation circuit, digital signal processor, interface module and
Display module, it is characterised in that buffer stage output end is sequentially connected pre-differential amplifier circuit, 50HZ trap circuits, voltage and puts
Big module, low-pass filter circuit, level adjustment circuit, isolation circuit, digital signal processor, interface module and display module,
Buffer stage input connects input signal；The input signal is electrocardiosignal；The isolation circuit uses LOC110 linear lights
Coupling is controlled.
As further scheme of the invention：The low-pass filter circuit uses Butterworth type third-order filter.
Compared with prior art, the beneficial effects of the invention are as follows：Ecg signal acquiring processing system of the present invention is to whole system
System optimizes design, can overcome some difficulties that electrocardiosignal is commonly encountered in extracting, and has preamplifier higher
Common-mode rejection ratio such that it is able to the electrocardiosignal that preferably amplification detection goes out.
Brief description of the drawings
Fig. 1 is the schematic block circuit diagram of ecg signal acquiring processing system.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
Fig. 1 is referred to, in the embodiment of the present invention, one kind is used for ecg signal acquiring processing system, including buffer stage, preposition
Differential amplifier circuit, 50HZ trap circuits, voltage amplification module, low-pass filter circuit, level adjustment circuit, isolation circuit, number
Word signal processor, interface module and display module, buffer stage output end are sequentially connected pre-differential amplifier circuit, 50HZ traps
Circuit, voltage amplification module, low-pass filter circuit, level adjustment circuit, isolation circuit, digital signal processor, interface module
And display module, buffer stage input connection input signal；The input signal is electrocardiosignal；The isolation circuit is used
LOC110 linear optical couplings are controlled；The low-pass filter circuit uses Butterworth type third-order filter.
Operation principle of the invention is：Fig. 1 is referred to, buffering is set between input signal and pre-differential amplifier circuit
Level primarily to realize input impedance higher, level adjustment circuit be in order to meet A/D converter input range the need for,
50HZ trap circuits are used to filter the interference signal of AC mains introducing, and isolation circuit further improves the stabilization of signal,
Digital signal processor is contrasted the signal of input with the electrocardiosignal curve of normal person, and by normal electrocardiosignal with
The electrocardiosignal images outputting for detecting is to display module；Low pass filter is responsible for suppression broadband noise and resists in front of the adc
The dual role of aliasing, both require that the passband of low pass filter is as flat as possible, and The faster the better for speed of roll-offing, to obtain
Signal to noise ratio higher, according to this feature, from Butterworth type third-order filter.
Ecg signal acquiring processing system of the present invention optimizes design to whole system, and electrocardiosignal can be overcome to extract
In be commonly encountered some are difficult, make preamplifier that there is common-mode rejection ratio higher such that it is able to which preferably amplification detection goes out
Electrocardiosignal.
It is obvious to a person skilled in the art that the invention is not restricted to the details of above-mentioned one exemplary embodiment, Er Qie
In the case of without departing substantially from spirit or essential attributes of the invention, the present invention can be in other specific forms realized.Therefore, no matter
From the point of view of which point, embodiment all should be regarded as exemplary, and be nonrestrictive, the scope of the present invention is by appended power
Profit requires to be limited rather than described above, it is intended that all in the implication and scope of the equivalency of claim by falling
Change is included in the present invention.Any reference in claim should not be considered as the claim involved by limitation.
Moreover, it will be appreciated that although the present specification is described in terms of embodiments, not each implementation method is only wrapped
Containing an independent technical scheme, this narrating mode of specification is only that for clarity, those skilled in the art should
Specification an as entirety, the technical scheme in each embodiment can also be formed into those skilled in the art through appropriately combined
May be appreciated other embodiment.
Claims (2)
1. it is a kind of to be used for ecg signal acquiring processing system, including buffer stage, pre-differential amplifier circuit, 50HZ trap circuits,
Voltage amplification module, low-pass filter circuit, level adjustment circuit, isolation circuit, digital signal processor, interface module and display
Module, it is characterised in that buffer stage output end is sequentially connected pre-differential amplifier circuit, 50HZ trap circuits, voltage amplification mould
Block, low-pass filter circuit, level adjustment circuit, isolation circuit, digital signal processor, interface module and display module, buffering
Level input connection input signal；The input signal is electrocardiosignal；The isolation circuit uses LOC110 linear optical coupling controls
System.
2. ecg signal acquiring processing system according to claim 1, it is characterised in that the low-pass filter circuit is used
Butterworth type third-order filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611238537.7A CN106725431A (en) | 2016-12-28 | 2016-12-28 | One kind is used for ecg signal acquiring processing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611238537.7A CN106725431A (en) | 2016-12-28 | 2016-12-28 | One kind is used for ecg signal acquiring processing system |
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| Publication Number | Publication Date |
|---|---|
| CN106725431A true CN106725431A (en) | 2017-05-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611238537.7A Pending CN106725431A (en) | 2016-12-28 | 2016-12-28 | One kind is used for ecg signal acquiring processing system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109199370A (en) * | 2018-09-21 | 2019-01-15 | 北京机械设备研究所 | A kind of EEG signals amplifying device and method |
| CN116859289A (en) * | 2023-09-04 | 2023-10-10 | 国网江苏省电力有限公司常州供电分公司 | Ground fault detection device for direct current system of transformer substation |
-
2016
- 2016-12-28 CN CN201611238537.7A patent/CN106725431A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109199370A (en) * | 2018-09-21 | 2019-01-15 | 北京机械设备研究所 | A kind of EEG signals amplifying device and method |
| CN109199370B (en) * | 2018-09-21 | 2021-08-13 | 北京机械设备研究所 | Electroencephalogram signal amplification device and method |
| CN116859289A (en) * | 2023-09-04 | 2023-10-10 | 国网江苏省电力有限公司常州供电分公司 | Ground fault detection device for direct current system of transformer substation |
| CN116859289B (en) * | 2023-09-04 | 2023-11-14 | 国网江苏省电力有限公司常州供电分公司 | Ground fault detection device for direct current system of transformer substation |
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170531 |
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| WD01 | Invention patent application deemed withdrawn after publication |