CN104382583B - A kind of 18 harvester leading electrocardiosignal and methods thereof - Google Patents
A kind of 18 harvester leading electrocardiosignal and methods thereof Download PDFInfo
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- CN104382583B CN104382583B CN201410633655.2A CN201410633655A CN104382583B CN 104382583 B CN104382583 B CN 104382583B CN 201410633655 A CN201410633655 A CN 201410633655A CN 104382583 B CN104382583 B CN 104382583B
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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
- A61B5/25—Bioelectric electrodes therefor
- A61B5/279—Bioelectric electrodes therefor specially adapted for particular uses
- A61B5/28—Bioelectric electrodes therefor specially adapted for particular uses for electrocardiography [ECG]
- A61B5/282—Holders for multiple electrodes
-
- 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
- A61B5/30—Input circuits therefor
Abstract
The present invention relates to electrocardiograph technical field, be specifically related to a kind of 18 harvester leading electrocardiosignal and methods thereof, pass through 15 lead signals acquisition channels and a reference signal acquisition channel including: human body signal, after respectively obtain 15 tunnel lead signals；It is connected to multi-gain amplification unit on lead signals acquisition channel, for all lead signals being processed and gain amplification, obtains 14 tunnel electrocardiosignaies；Being connected to AD conversion unit on this multi-gain amplification unit, this 14 tunnel electrocardiosignal is changed by AD conversion unit, obtains 14 tunnel electrocardiographicdigital digital signals；Being connected to ECG's data compression unit in AD conversion unit, ECG's data compression unit, for 14 tunnel electrocardiographicdigital digital signals are carried out computing, obtains 18 and leads electrocardiosignal.Present invention achieves the synchronous acquisition leading electrocardiogram (ECG) data to 18, overcome prior art can not lead ecg wave form to 18 and carry out the problem of synchronous acquisition, improve the accuracy of signals collecting.
Description
Technical field
The present invention relates to electrocardiograph technical field, be specifically related to a kind of 18 harvester leading electrocardiosignal and methods thereof。
Background technology
Electrocardiograph is the diagnostic medical device of the electrocardiographic examination of a kind of routine, existing electrocardiograph its according to recorder output number of channels divide generally comprise: single track, three roads, six roads and 12 road electrocardiographs etc.；And 12 road electrocardiographs are one the most advanced in prior art, it generally comprises 12 leads, and it is respectively as follows: limbs
I
Lead
,
Limbs
II
Lead
,
Limbs
III
Lead
,
Pressurization
AVR
Lead
,
Pressurization
AVL
Lead
,
Pressurization
AVF
Lead
,
Chest lead
V1
~
V6
Electrocardiosignal, provide necessary diagnostic message for clinician.Under normal circumstances, 12 conventional leads can meet the demand of diagnosis for heart disease clinically, but when patient suffers from merging right ventricular infarction, advise clinically recommending when AIMI increasing to Right chest lead (
V3R
~
V5R
) detect.When patient is associated with myocardial infarction or acute coronary syndrome, because some treatments depend on
ST
The evidence raised of section, clinically suggestion increase rear wall led (
V7
~
V9
) detect.
And in existing technology, also do not have can gather simultaneously and analyze the 18 electrocardio equipment led for clinic.Under current technical conditions, 12 lead electrocardiograph do not support 18 lead electrocardio sampling.If really to utilize 12 to lead electrocardiograph to obtain 18 and lead electrocardiosignal, it is necessary to be divided into double sampling, carrying out the 12 of standard for the first time and lead electrocardio sampling, obtain standard 12 lead electrocardiogram (ECG) data, second time keeps the electrode of limb lead motionless, is led by breast V1 ~ V6 Electrode move respectively Right chest lead ( V3R ~ V5R ) and rear wall lead ( V7 ~ V9 ) corresponding position, obtain extra Right chest lead and electrocardiogram (ECG) data that rear wall leads, then by clinician, the electrocardiosignal of double sampling is integrated, carry out clinical diagnosis.But the electrocardiosignal being obtained by is time sharing sampling, doctor needs again to lay electrode before carrying out sampling for the second time, and this needs to expend the regular hour, it is contemplated that the time interval of double sampling can reach 5S Above, and front and back double sampling obtain 18 to lead electrocardiosignal be not the electrocardiosignal synchronized.Due to front and back's double sampling, to have the regular hour poor, and the waveform of front and back's double sampling can not be mapped from the time by doctor, and this ecg wave form sampled at twice can only have certain reference significance, and this brings the biggest inconvenience to the diagnosis of clinician。
Summary of the invention
For overcoming drawbacks described above, the purpose of the present invention is i.e. to provide a kind of 18 harvester leading electrocardiosignal and methods thereof.
It is an object of the invention to be achieved through the following technical solutions:
The present invention is a kind of 18 harvesters leading electrocardiosignal, including: 15 lead signals acquisition channels and a reference signal acquisition channel, described 15 lead signals acquisition channels are respectively as follows: three limb lead acquisition channels, six chest lead acquisition channels, three Right chest lead acquisition channels, three rear walls lead acquisition channel；Described lead signals acquisition channel for the human body signal gathered on position corresponding thereto and carries out pretreatment to this human body signal, respectively obtains 15 lead signals；Described reference signal acquisition channel is connected with the differential filtering circuit in described 15 lead signals acquisition channels respectively, for providing reference signal for differential filtering circuit；
Connect on described lead signals acquisition channel and have multi-gain amplification unit, described multi-gain amplification unit using the lead signals on a limb lead acquisition channel as reference signal, remaining 14 lead signals and described reference signal carry out calculation process, and carry out gain amplification, obtain 14 tunnel electrocardiosignaies；
Connect on described multi-gain amplification unit and have AD conversion unit, described 14 tunnel electrocardiosignaies are carried out Parallel transformation by described AD conversion unit, obtaining 14 tunnel electrocardiographicdigital digital signals, described 14 tunnel electrocardiographicdigital digital signals include: six tunnel chest lead signals, three road Right chest lead signals, three road rear wall lead signals, the first limb lead signal, the second limb lead signal；
Intentionally electric signal processing unit is connected in described AD conversion unit, described ECG's data compression unit is for obtaining 14 tunnel electrocardiographicdigital digital signals in described multi-gain amplification unit, and first, second limb lead signal in 14 tunnel electrocardiographicdigital digital signals is carried out computing, obtain three bearings lead signals and three road augmented-lead signals, obtain 18 and lead electrocardiosignal.
Further, described lead signals acquisition channel includes: the lead signals harvester that is sequentially connected with, protection circuit, low-pass filter circuit, buffering discharge circuit, differential filtering circuit；
Described lead signals harvester is arranged on human body, for being acquired human body signal；
Described protection circuit is used for protecting late-class circuit the most breakdown；
Described low-pass filter circuit is for filtering the interference signal in human body signal；
Described buffering discharge circuit is for improving the input impedance in all human body signals；
Described differential filtering circuit is connected with described multi-gain amplification unit, for being filtered human body signal.
Further, described reference signal acquisition channel includes: the reference signal harvester that is sequentially connected with, reference signal protection circuit, reference signal driver element,
Described reference signal harvester is arranged on human body, for being acquired human body signal；
Described reference signal protection circuit is used for protecting late-class circuit the most breakdown；
Described reference signal driver element connects with differential filtering circuit and its output head grounding, for providing reference signal for differential filtering circuit.
Further, present invention additionally comprises: lead-fail detector detector unit,
Described lead-fail detector detector unit is connected with described ECG's data compression unit and described low-pass filter circuit respectively, for the signal input state of 15 lead signals acquisition channels of detection.
Further, described ECG's data compression unit connects and has printing and output unit, described printing to be connected with outside host computer and printer with output unit, send to host computer for leading electrocardiosignal by obtained from ECG's data compression unit 18, and
/
Or drive printer to lead the waveform corresponding to electrocardiosignal to 18 and print.
Further, it is provided with signal quality indicating circuit between described ECG's data compression unit and described printing and output unit, described signal quality indicating circuit judges for the quality that the 18 of ECG's data compression unit is led electrocardiosignal, and controls display lamp display current signal quality state.
The present invention is a kind of 18 harvesters leading electrocardiosignal, including: 15 lead signals acquisition channels and a reference signal acquisition channel, described 15 lead signals acquisition channels are respectively as follows: first, second, third limb lead acquisition channel, six chest lead acquisition channels, three Right chest lead acquisition channels, three rear walls lead acquisition channel；Described lead signals acquisition channel for the human body signal gathered on position corresponding thereto and carries out pretreatment to this human body signal, respectively obtains 15 lead signals；Described reference signal acquisition channel is connected with the differential filtering circuit in described 15 lead signals acquisition channels respectively, for providing reference signal for differential filtering circuit；
Connect on described lead signals acquisition channel and have multi-gain amplification unit, described multi-gain amplification unit using the lead signals on the first limb lead acquisition channel as reference signal, remaining 14 lead signals and described reference signal carry out calculation process, and carry out gain amplification, obtain 14 tunnel electrocardiosignaies；And the lead signals between second, third limb lead acquisition channel is carried out computing, obtains the 15th tunnel electrocardiosignal:
Connect on described multi-gain amplification unit and have AD conversion unit, 15 tunnel electrocardiosignaies are carried out Parallel transformation by described AD conversion unit, obtaining 15 tunnel electrocardiographicdigital digital signals, described 15 tunnel electrocardiographicdigital digital signals include: six tunnel chest lead signals, three road Right chest lead signals, three road rear wall lead signals, three leg body lead signals；
Intentionally electric signal processing unit is connected in described AD conversion unit, described ECG's data compression unit is for obtaining 15 tunnel electrocardiographicdigital digital signals in described multi-gain amplification unit, and the limb lead signal in 15 tunnel electrocardiographicdigital digital signals is carried out computing, obtain three road augmented-lead signals, obtain 18 and lead electrocardiosignal.
A kind of ecg signal acquiring method applying as above 18 harvesters leading electrocardiosignal of the present invention, including:
Utilize 16 signal sampling channels that the human body signal on relevant position is acquired, and the human body signal collected using one of them signal sampling channel is as reference signal, remaining 15 human body signal contrasts with this reference signal, and carries out pretreatment, respectively obtains 15 lead signals；Described 15 lead signals are respectively as follows: three limb lead signals, six chest lead signals, three Right chest lead signals, three rear wall lead signals；
Using a limb lead signal as reference signal, remaining 14 lead signals and described reference signal carry out calculation process and amplify with gain, obtain 14 tunnel electrocardiosignaies；
Described 14 tunnel electrocardiosignaies are carried out Parallel transformation, obtaining 14 tunnel electrocardiographicdigital digital signals, described 14 tunnel electrocardiographicdigital digital signals include: six tunnel chest lead signals, three road Right chest lead signals, three road rear wall lead signals, the first limb lead signal, the second limb lead signal；
First, second limb lead signal is carried out computing, obtains three bearings lead signals and three road augmented-lead signals, thus form 18 and lead electrocardiosignal.
Further, described utilize 16 signal sampling channels that the human body signal on relevant position is acquired, and the human body signal collected using one of them signal sampling channel is as reference signal, remaining 15 human body signal contrasts with this reference signal, and carry out pretreatment, respectively obtain 15 lead signals and also include:
By 16 lead signals acquisition electrodes, human body signal is acquired, obtains 16 human body signals；
Using a human body signal in 16 human body signals as reference signal, remaining 15 human body signal contrasts with this reference signal, obtains 15 input signals；
Each input signal is carried out low-pass filtering, to filter the interference signal in input signal；
After having carried out low-pass filtering, improve the input impedance of input signal, then carry out differential filtering, obtain 15 lead signals.
Further, described formation 18 includes after leading electrocardiosignal:
Lead electrocardiosignal quality to judge 18, when signal quality is preferable, control display lamp display current signal quality state.
The present invention a kind of 18 leads the harvester of electrocardiosignal, on the basis of it leads electrocardiograph original 12, increases by three road Right chest lead passages
,
Lead passage with three road rear walls, obtain at least ten four lead signals, then according to certain algorithm carries out computing to the above-mentioned signal led, obtain real 18 and lead electrocardiosignal so that electrocardiograph disposably gathers out 18 and leads ecg wave form；Achieve the synchronous acquisition leading electrocardiogram (ECG) data to 18, overcome prior art can not lead ecg wave form to 18 and carry out the problem of synchronous acquisition, improve the accuracy of signals collecting.
Accompanying drawing explanation
For ease of explanation, the present invention is described in detail by following preferred embodiment and accompanying drawing.
Figure
1
The logic schematic diagram of one embodiment of harvester of electrocardiosignal is led for the present invention 18；
Figure
2
The logic schematic diagram of another embodiment of harvester of electrocardiosignal is led for the present invention 18；
Figure
3
The logic schematic diagram of another embodiment of harvester of electrocardiosignal is led for the present invention 18；
Figure
4
The operation principle schematic diagram of the ecg signal acquiring method of 18 harvesters leading electrocardiosignal is applied for the present invention.
Detailed description of the invention
In order to make the purpose of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is described in more detail.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
Refer to Fig. 1 to Fig. 2, the present invention is a kind of 18 harvesters leading electrocardiosignal, including: 15 lead signals acquisition channels 210 and a reference signal acquisition channel 211, described 15 lead signals acquisition channels 210 are respectively as follows: three limb lead acquisition channels, six chest lead acquisition channels, three Right chest lead acquisition channels, three rear walls lead acquisition channel；Described lead signals acquisition channel for the human body signal gathered on position corresponding thereto and carries out pretreatment to this human body signal, respectively obtains 15 lead signals；Described reference signal acquisition channel 211 is connected with the differential filtering circuit in described 15 lead signals acquisition channels 219 respectively, for providing reference signal for differential filtering circuit；
Described three limb lead acquisition channels are respectively as follows: left upper extremity LA acquisition channel, right upper extremity RA acquisition channel, left lower extremity LL acquisition channel, described six chest lead acquisition channels are respectively as follows: breast and lead V1～V6 acquisition channel, described three Right chest lead acquisition channels are respectively as follows: Right chest lead V3R～V5R acquisition channel, and described three rear walls acquisition channel that leads is respectively as follows: rear wall and leads V7～V9 acquisition channel；
Connect on described lead signals acquisition channel 210 and have multi-gain amplification unit 307, described multi-gain amplification unit 307 using the lead signals on a limb lead acquisition channel as reference signal, remaining 14 lead signals and described reference signal carry out calculation process, and carry out gain amplification, obtain 14 tunnel electrocardiosignaies；Such as: participate in computing as reference level, wherein to the calculating of each lead signals all can use the lead signals of right upper extremity RA acquisition channel: I=LA-RA；II=LL-RA.
Lead signals is after differential filtering circuit 306, and gain amplifying circuit 307 carries out parallel processing to 14 tunnel lead signals.The input of ten four path parallel amplifiers is connected respectively to cardiac diagnosis lead-line, and outfan is then connected respectively to ten four path parallel digital to analog converters.The hardware configuration of ten described four path parallel amplifiers is the same, and has identical hardware gain, and this gain is program control, and can be adjusted by software.By controlling the gain of amplifier, electrocardiosignal is amplified to suitable voltage range, it is ensured that amplifier also will not be saturated under maximum polarizing voltage.Ten four-way amplifiers use the framework that direct currents amplify, and remove exchange Rhizoma Nelumbinis and electric capacity, after the hardware of such ecg amplifier is saturated, it is possible to recovery ecg wave form quickly.
Described multi-gain amplification unit
307
Upper connection has AD conversion unit
308
, described AD conversion unit
308
Described 14 tunnel electrocardiosignaies being carried out Parallel transformation, obtains 14 tunnel electrocardiographicdigital digital signals, described 14 tunnel electrocardiographicdigital digital signals are respectively as follows: chest lead
V1
Signal, chest lead
V2
Signal, chest lead
V3
Signal, chest lead
V4
Signal, chest lead
V5
Signal, chest lead
V6
Signal, Right chest lead
V3R
Signal, Right chest lead
V4R
Signal, Right chest lead
V5R
Signal, rear wall lead
V7
Signal, rear wall lead
V8
Signal, rear wall lead
V9
Signal, the first limb lead signal, the second limb lead signal；In the two-way limb lead signal of described first, second limb lead signal, it can arbitrarily be chosen, limbs
I
Lead signals, limbs
II
Lead signals, limbs
III
Any two-way electrocardiographicdigital digital signals in lead signals, respectively as first, second limb lead signal；First limb lead signal chooses limbs in the present embodiment
I
Lead signals, the second limb lead signal chooses limbs
II
Lead signals；
Described AD conversion unit
308
Upper connection intentionally electric signal processing unit
309
, described ECG's data compression unit
309
For obtaining described multi-gain amplification unit
307
In 14 tunnel electrocardiographicdigital digital signals, and first, second limb lead signal in 14 tunnel electrocardiographicdigital digital signals is carried out computing, obtains three bearings lead signals, augmented-lead
AVR
Signal, augmented-lead
AVF
Signal, augmented-lead
AVL
Signal, obtains 18 and leads electrocardiosignal；This three bearings lead signals is limbs in the present embodiment
III
Lead signals.Described ECG's data compression unit
309
In its circular be: limbs
III
Lead and pass through limbs
II
Lead and deduct limbs
I
Lead and obtain, augmented-lead
AVR
Pass through limbs
I
Lead and limbs
II
Lead after summation, be then multiplied by negative one divided by 2 and obtain.Augmented-lead
AVF
Pass through limbs
II
Lead and limbs
III
Lead after summation, obtain divided by 2.Augmented-lead
AVL
Pass through limbs
I
Lead and deduct limbs
III
After leading, obtain divided by 2.Wherein:
I=LA-RA
,
II=LL-RA
；
Carrying out computing according to above-mentioned formula, can obtain in addition to 14 lead four electrocardiosignaies of leading, aforementioned four is led and limbs
I
Lead
,
Limbs
II
Lead
,
Chest lead
V1
~
V6,
Right chest lead
V3R
~
V5R,
Rear wall leads
V7
~
V9
Together, constitute complete 18 to lead electrocardiosignal.Above-mentioned computing and sample-synchronous are carried out, and can obtain 18 by once sampling and lead electrocardiosignal.
Existing twelve-lead electrocardiogram machine includes eight acquisition channels, it may be assumed that limb lead I, limb lead II, and breast leads V1～V6；The present invention is six acquisition channels on the basis of twelve-lead electrocardiogram machine, i.e. increases Right chest lead V3R～V5R, and rear wall leads V7～V9, to realize 18 collections leading electrocardiosignal.
Further, described lead signals acquisition channel includes: the lead signals harvester 301 that is sequentially connected with, protection circuit 302, low-pass filter circuit 303, buffering discharge circuit 305, differential filtering circuit 306；
Described lead signals harvester 301 is arranged on human body, for being acquired human body signal；
Described protection circuit 302 is mainly made up of high-pressure discharge tube protective circuit 302 and low pressure clamp diode, is used for protecting late-class circuit the most breakdown；
Described low-pass filter circuit 303 is mainly made up of resistance and capacitances in series, owing to the human body signal of input comprises electrocardio useful signal and interference signal, low pass filter is used to limit the bandwidth of input signal, suppression High-frequency Interference and pulse, such as EFT(Fast electrical Pulse Train), ESD(Electro-Staticdischarge) and radiation disturbance etc., making that electrocardio useful signal is zero-decrement to be passed through, it is for filtering the interference signal in human body signal；
Described buffering discharge circuit 305 is for improving the input impedance in all human body signals；Owing to human body source impedance is big and weak output signal, when gathering human body signal, conducting wire electrode and human contact's impedance may make source impedance bigger, produce interference greatly for faint ecg signal acquiring.The way eliminating high source impedance influences is exactly that board uses more high input impedance.This part circuit uses buffering amplifier to realize high input impedance, improves driving force simultaneously.
Described differential filtering circuit 306 is connected with described multi-gain amplification unit 307, for being filtered human body signal.Owing to the low-pass filter circuit 303 of front end is limited by Resistance Thermal Noise and input impedance, the cut-off frequency of filtering can not reach the lowest, so carrying out differential filtering after buffering.According to nyquist sampling rate, cut-off frequency is less than 0.5 sampling rate, prevents high-frequency signal aliasing from forming noise.
Further, reference signal acquisition channel includes: the reference signal harvester 314 that is sequentially connected with, reference signal protection circuit 315, reference signal driver element 304,
Described reference signal harvester 314 is arranged on human body, and for being acquired human body signal, this reference signal harvester 314 is right lower extremity (RL) acquisition electrode；
Described reference signal protection circuit 315 is used for protecting late-class circuit the most breakdown；
Described reference signal driver element 304 connects with differential filtering circuit 306 and its output head grounding, for providing reference signal for differential filtering circuit 306, its human body signal also is not involved in subsequent conditioning circuit calculating, for reference only level, it is possible to eliminate the common-mode signal of human body.
Further, present invention additionally comprises: lead-fail detector detector unit 310,
Described lead-fail detector detector unit 310 is connected with described ECG's data compression unit 309 and described low-pass filter circuit 303 respectively, for the signal input state of 15 lead signals acquisition channels of detection.
Further, connect on described ECG's data compression unit 309 and have printing and output unit 311, described printing is connected with outside host computer and printer with output unit 311, send to host computer for leading electrocardiosignal by obtained from ECG's data compression unit 309 18, and/or driving printer is led the waveform corresponding to electrocardiosignal and printed 18.Print the ECG Data Transmission Based that collects with output unit 311 by USB interface to host computer 312.Such as computer etc..Its data transfer mode can also be serial ports, network interface, WIFI or bluetooth etc., it is not limited to USB interface.When doctor selects printed report, 18 can be gone out with isochronous printing and lead cardiac electrical diagnosis report.It should be explicitly made clear at this point, this report be parallel print 18 lead ecg wave form, provide diagnosis basis for doctor.
Further, it is provided with signal quality indicating circuit 313 between described ECG's data compression unit 309 and described printing and output unit 311, described signal quality indicating circuit 313 judges for the quality that the 18 of ECG's data compression unit 309 is led electrocardiosignal, and controls display lamp display current signal quality state.When signal quality is preferable, it controls LED light display current signal quality state, in order to current signal quality is judged and prints by user, it is to avoid print signal quality is poor when.
Refer to Fig. 3, when lead signals acquisition channel quantity of the present invention is more, limbs III lead signals can be directly acquired by it, itself particularly as follows:
A kind of 18 harvesters leading electrocardiosignal, including: 15 lead signals acquisition channels 210 and a reference signal acquisition channel 211, described 15 lead signals acquisition channels 210 are respectively as follows: first, second, third limb lead acquisition channel, six chest lead acquisition channels, three Right chest lead acquisition channels, three rear walls lead acquisition channel；Described lead signals acquisition channel for the human body signal gathered on position corresponding thereto and carries out pretreatment to this human body signal, respectively obtains 16 lead signals；Described reference signal acquisition channel 211 is connected with the differential filtering circuit in described 15 lead signals acquisition channels 219 respectively, for providing reference signal for differential filtering circuit；
Described lead signals acquisition channel
210
Upper connection has multi-gain amplification unit
307
, described multi-gain amplification unit
307
Using the lead signals on the first limb lead acquisition channel as reference signal, remaining 14 lead signals and described reference signal carry out calculation process, and carry out gain amplification, obtain 14 tunnel electrocardiosignaies；The calculating of each road signal output can use the first limb lead acquisition channel, i.e. right upper extremity (
RA
) lead signals that collected of the acquisition channel that leads participates in computing as reference level, such as:
I=LA-RA
；
II=LL-RA
Therefore, at differential filtering circuit
306
Outfan is
14
Road cardiac diagnosis lead signal, and the lead signals between second, third limb lead acquisition channel is carried out computing, obtains the 15th tunnel electrocardiosignal: the second limb lead acquisition channel and three bearings lead acquisition channel, i.e. left lower extremity (
LL
) lead with left upper extremity (
LA
) lead through protection circuit, low pass circuit, buffer amplifier circuit enters differential filtering circuit after processing
3062
In, wherein
LL
Lead the positive pole as differential filtering,
LA
Lead the negative pole as differential filtering, and the two is made after the recovery and i.e. can get the 15th tunnel electrocardiosignal, i.e. limbs
III
Lead.
Described multi-gain amplification unit
307
Upper connection has AD conversion unit
308
, described AD conversion unit
308
Described 15 tunnel electrocardiosignaies being carried out Parallel transformation, obtains 15 tunnel electrocardiographicdigital digital signals, described 15 tunnel electrocardiographicdigital digital signals are respectively as follows: chest lead
V1
Signal, chest lead
V2
Signal, chest lead
V3
Signal, chest lead
V4
Signal, chest lead
V5
Signal, chest lead
V6
Signal, Right chest lead
V3R
Signal, Right chest lead
V4R
Signal, Right chest lead
V5R
Signal, rear wall lead
V7
Signal, rear wall lead
V8
Signal, rear wall lead
V9
Signal, limbs
I
Lead signals, limbs
II
Lead signals, limbs
III
Lead signals.
Described AD conversion unit
308
Upper connection intentionally electric signal processing unit
309
, described ECG's data compression unit
309
For obtaining described multi-gain amplification unit
307
In 15 tunnel electrocardiographicdigital digital signals, and the limb lead signal in 15 tunnel electrocardiographicdigital digital signals is carried out computing, obtains three road augmented-lead signals: augmented-lead
AVR
Signal, augmented-lead
AVF
Signal, augmented-lead
AVL
Signal, thus obtain 18 and lead electrocardiosignal.
Refer to figure
4
, a kind of ecg signal acquiring method applying as above 18 harvesters leading electrocardiosignal of the present invention, including:
101.
Gather human body signal
Utilize 16 signal sampling channels that the human body signal on relevant position is acquired, by 16 lead signals acquisition electrodes, human body signal is acquired, obtain 16 human body signals；
Using a human body signal in 16 human body signals as reference signal, remaining 15 human body signal contrasts with this reference signal, obtains 15 input signals；
102.
Low-pass filtering
Each input signal is carried out low-pass filtering, to filter the interference signal in input signal；
103.
Buffering amplifier
After having carried out low-pass filtering, 15 input signals use buffering amplifier improve input impedance.Owing to human body source impedance is big and weak output signal, when gathering electrocardiosignal, conducting wire electrode and human contact's impedance may make source impedance bigger, produce interference greatly for faint ecg signal acquiring.The way eliminating high source impedance influences is exactly that board uses more high input impedance.This part circuit uses buffering amplifier to realize high input impedance, improves driving force simultaneously.
104.
Differential filtering
Owing to low-pass filtering is limited by Resistance Thermal Noise and input impedance, the cut-off frequency of filtering can not reach the lowest, so carrying out differential filtering after buffering.According to nyquist sampling rate, cut-off frequency is less than
0.5
Sampling rate, prevents high-frequency signal aliasing from forming noise；Obtain 15 lead signals
Described 15 lead signals are respectively as follows: three limb lead signals, six chest lead signals, three Right chest lead signals, three rear wall lead signals；
105.
Gain is amplified
Using a limb lead signal as reference signal, remaining 14 lead signals and described reference signal carry out calculation process and amplify with gain, obtain 14 tunnel electrocardiosignaies；
106.
14 road Parallel transformation
Described 14 tunnel electrocardiosignaies are carried out Parallel transformation, obtaining 14 tunnel electrocardiographicdigital digital signals, described 14 tunnel electrocardiographicdigital digital signals include: six tunnel chest lead signals, three road Right chest lead signals, three road rear wall lead signals, the first limb lead signal, the second limb lead signal；
107.
Produce 18 and lead electrocardiosignal
First, second limb lead signal is carried out computing, obtains three bearings lead signals and three road augmented-lead signals, thus form 18 and lead electrocardiosignal.Circular is: limbs
III
Lead and pass through limbs
II
Lead and deduct limbs
I
Lead and obtain, augmented-lead
AVR
Pass through limbs
I
Lead and limbs
II
Lead after summation, be then multiplied by negative one divided by 2 and obtain.Augmented-lead
AVF
Pass through limbs
II
Lead and limbs
III
Lead after summation, obtain divided by 2.Augmented-lead
AVL
Pass through limbs
I
Lead and deduct limbs
III
After leading, obtain divided by 2.Wherein:
I=LA-RA
,
II=LL-RA
；
Carrying out computing according to above-mentioned formula, can obtain in addition to 14 lead four electrocardiosignaies of leading, aforementioned four is led and limbs
I
Lead
,
Limbs
II
Lead
,
Chest lead
V1
~
V6,
Right chest lead
V3R
~
V5R,
Rear wall leads
V7
~
V9
Together, constitute complete 18 to lead electrocardiosignal.
108.
Signal quality indicates
Lead electrocardiosignal quality to judge 18, when signal quality is preferable, control display lamp display current signal quality state；So that current signal quality is judged by user.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all any amendment, equivalent and improvement etc. made within the spirit and principles in the present invention, should be included within the scope of the present invention。
Claims (10)
1. the harvester leading electrocardiosignal, it is characterized in that, including: 15 lead signals acquisition channels and a reference signal acquisition channel, described 15 lead signals acquisition channels are respectively as follows: three limb lead acquisition channels, six chest lead acquisition channels, three Right chest lead acquisition channels, three rear walls lead acquisition channel；Described lead signals acquisition channel for the human body signal gathered on position corresponding thereto and carries out pretreatment to this human body signal, respectively obtains 15 lead signals；Described reference signal acquisition channel is connected with the differential filtering circuit in described 15 lead signals acquisition channels respectively, for providing reference signal for differential filtering circuit；
Connect on described lead signals acquisition channel and have multi-gain amplification unit, described multi-gain amplification unit using the lead signals on a limb lead acquisition channel as reference signal, remaining 14 lead signals and described reference signal carry out calculation process, and carry out gain amplification, obtain 14 tunnel electrocardiosignaies；
Connect on described multi-gain amplification unit and have AD conversion unit, described 14 tunnel electrocardiosignaies are carried out Parallel transformation by described AD conversion unit, obtaining 14 tunnel electrocardiographicdigital digital signals, described 14 tunnel electrocardiographicdigital digital signals include: six tunnel chest lead signals, three road Right chest lead signals, three road rear wall lead signals, the first limb lead signal, the second limb lead signal；
Intentionally electric signal processing unit is connected in described AD conversion unit, described ECG's data compression unit is for obtaining 14 tunnel electrocardiographicdigital digital signals in described multi-gain amplification unit, and first, second limb lead signal in 14 tunnel electrocardiographicdigital digital signals is carried out computing, obtain three bearings lead signals and three road augmented-lead signals, obtain 18 and lead electrocardiosignal.
The most according to claim 1 18 harvesters leading electrocardiosignal, it is characterised in that described lead signals acquisition channel includes: the lead signals harvester that is sequentially connected with, protection circuit, low-pass filter circuit, buffering discharge circuit, differential filtering circuit；
Described lead signals harvester is arranged on human body, for being acquired human body signal；
Described protection circuit is used for protecting late-class circuit the most breakdown；
Described low-pass filter circuit is for filtering the interference signal in human body signal；
Described buffering discharge circuit is for improving the input impedance in all human body signals；
Described differential filtering circuit is connected with described multi-gain amplification unit, for being filtered human body signal.
The most according to claim 2 18 harvesters leading electrocardiosignal, it is characterised in that described reference signal acquisition channel includes: the reference signal harvester that is sequentially connected with, reference signal protection circuit, reference signal driver element,
Described reference signal harvester is arranged on human body, for being acquired human body signal；
Described reference signal protection circuit is used for protecting late-class circuit the most breakdown；
Described reference signal driver element connects with differential filtering circuit and its output head grounding, for providing reference signal for differential filtering circuit.
The most according to claim 3 18 harvesters leading electrocardiosignal, it is characterised in that also include: lead-fail detector detector unit,
Described lead-fail detector detector unit is connected with described ECG's data compression unit and described low-pass filter circuit respectively, for the signal input state of 15 lead signals acquisition channels of detection.
The most according to claim 4 18 harvesters leading electrocardiosignal, it is characterized in that, connect on described ECG's data compression unit and have printing and output unit, described printing is connected with outside host computer and printer with output unit, send to host computer for leading electrocardiosignal by obtained from ECG's data compression unit 18, and/or driving printer is led the waveform corresponding to electrocardiosignal and printed 18.
The most according to claim 5 18 harvesters leading electrocardiosignal, it is characterized in that, it is provided with signal quality indicating circuit between described ECG's data compression unit and described printing and output unit, described signal quality indicating circuit judges for the quality that the 18 of ECG's data compression unit is led electrocardiosignal, and controls display lamp display current signal quality state.
7. the harvester leading electrocardiosignal, it is characterized in that, including: 15 lead signals acquisition channels and a reference signal acquisition channel, described 15 lead signals acquisition channels are respectively as follows: first, second, third limb lead acquisition channel, six chest lead acquisition channels, three Right chest lead acquisition channels, three rear walls lead acquisition channel；Described lead signals acquisition channel for the human body signal gathered on position corresponding thereto and carries out pretreatment to this human body signal, respectively obtains 15 lead signals；Described reference signal acquisition channel is connected with the differential filtering circuit in described 15 lead signals acquisition channels respectively, for providing reference signal for differential filtering circuit；
Connect on described lead signals acquisition channel and have multi-gain amplification unit, described multi-gain amplification unit using the lead signals on the first limb lead acquisition channel as reference signal, remaining 14 lead signals and described reference signal carry out calculation process, and carry out gain amplification, obtain 14 tunnel electrocardiosignaies；And the lead signals between second, third limb lead acquisition channel is carried out computing, obtains the 15th tunnel electrocardiosignal:
Connect on described multi-gain amplification unit and have AD conversion unit, 15 tunnel electrocardiosignaies are carried out Parallel transformation by described AD conversion unit, obtaining 15 tunnel electrocardiographicdigital digital signals, described 15 tunnel electrocardiographicdigital digital signals include: six tunnel chest lead signals, three road Right chest lead signals, three road rear wall lead signals, three leg body lead signals；
Intentionally electric signal processing unit is connected in described AD conversion unit, described ECG's data compression unit is for obtaining 15 tunnel electrocardiographicdigital digital signals in described multi-gain amplification unit, and the limb lead signal in 15 tunnel electrocardiographicdigital digital signals is carried out computing, obtain three road augmented-lead signals, obtain 18 and lead electrocardiosignal.
8. the ecg signal acquiring method applying as claimed in claim 1 18 harvesters leading electrocardiosignal, it is characterised in that including:
Utilize 16 signal sampling channels that the human body signal on relevant position is acquired, and the human body signal collected using one of them signal sampling channel is as reference signal, remaining 15 human body signal contrasts with this reference signal, and carries out pretreatment, respectively obtains 15 lead signals；Described 15 lead signals are respectively as follows: three limb lead signals, six chest lead signals, three Right chest lead signals, three rear wall lead signals；
Using a limb lead signal as reference signal, remaining 14 lead signals and described reference signal carry out calculation process and amplify with gain, obtain 14 tunnel electrocardiosignaies；
Described 14 tunnel electrocardiosignaies are carried out Parallel transformation, obtaining 14 tunnel electrocardiographicdigital digital signals, described 14 tunnel electrocardiographicdigital digital signals include: six tunnel chest lead signals, three road Right chest lead signals, three road rear wall lead signals, the first limb lead signal, the second limb lead signal；
First, second limb lead signal is carried out computing, obtains three bearings lead signals and three road augmented-lead signals, thus form 18 and lead electrocardiosignal.
The ecg signal acquiring method of the harvester of electrocardiosignal is led in application the most according to claim 8 as claimed in claim 1 18, it is characterized in that, described utilize 16 signal sampling channels that the human body signal on relevant position is acquired, and the human body signal collected using one of them signal sampling channel is as reference signal, remaining 15 human body signal contrasts with this reference signal, and carry out pretreatment, respectively obtain 15 lead signals and also include:
By 16 lead signals acquisition electrodes, human body signal is acquired, obtains 16 human body signals；
Using a human body signal in 16 human body signals as reference signal, remaining 15 human body signal contrasts with this reference signal, obtains 15 input signals；
Each input signal is carried out low-pass filtering, to filter the interference signal in input signal；
After having carried out low-pass filtering, improve the input impedance of input signal, then carry out differential filtering, obtain 15 lead signals.
The ecg signal acquiring method of the harvester of electrocardiosignal is led in application the most according to claim 9 as claimed in claim 1 18, it is characterised in that described formation 18 includes after leading electrocardiosignal:
Lead electrocardiosignal quality to judge 18, when signal quality is preferable, control display lamp display current signal quality state.
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| CN109009075B (en) * | 2017-11-16 | 2023-03-24 | 天津天堰科技股份有限公司 | Electrocardio monitoring system and method |
| CN109984740A (en) * | 2018-01-03 | 2019-07-09 | 四川锦江电子科技有限公司 | A kind of device and method positioning ecg characteristics in body surface ECG data |
| CN108175404B (en) * | 2018-01-11 | 2023-08-01 | 成都心吉康科技有限公司 | Electrocardiosignal acquisition device and method for inhibiting touch interference |
| CN109567791A (en) * | 2019-01-30 | 2019-04-05 | 南京邮电大学 | A kind of low-power consumption electrocardiogram signal acquisition circuit |
| CN110090013B (en) * | 2019-04-30 | 2023-11-14 | 潍坊医学院 | Electrocardiosignal acquisition method and acquisition circuit based on navel reference electrode |
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| US20110004088A1 (en) * | 2009-05-13 | 2011-01-06 | Kurt Paul Grossman | The ecg shirt |
| EP2497418A1 (en) * | 2011-03-10 | 2012-09-12 | Koninklijke Philips Electronics N.V. | Current protection for electrode-based monitoring systems |
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