CN113180676A - Portable multi-lead electrocardiogram acquisition system and method based on capacitive coupling electrode - Google Patents
Portable multi-lead electrocardiogram acquisition system and method based on capacitive coupling electrode Download PDFInfo
- Publication number
- CN113180676A CN113180676A CN202110593873.8A CN202110593873A CN113180676A CN 113180676 A CN113180676 A CN 113180676A CN 202110593873 A CN202110593873 A CN 202110593873A CN 113180676 A CN113180676 A CN 113180676A
- Authority
- CN
- China
- Prior art keywords
- unit
- electrode
- electrocardio
- operational amplifier
- lead
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000008878 coupling Effects 0.000 title claims abstract description 80
- 238000010168 coupling process Methods 0.000 title claims abstract description 80
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 80
- 238000000034 method Methods 0.000 title claims abstract description 10
- 238000012545 processing Methods 0.000 claims abstract description 41
- 238000006243 chemical reaction Methods 0.000 claims abstract description 26
- 230000005540 biological transmission Effects 0.000 claims abstract description 20
- 230000003321 amplification Effects 0.000 claims abstract description 14
- 238000003199 nucleic acid amplification method Methods 0.000 claims abstract description 14
- 239000003990 capacitor Substances 0.000 claims description 24
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 6
- 229910052802 copper Inorganic materials 0.000 claims description 6
- 239000010949 copper Substances 0.000 claims description 6
- 230000001360 synchronised effect Effects 0.000 claims description 6
- 229910000679 solder Inorganic materials 0.000 claims description 3
- 238000005253 cladding Methods 0.000 claims description 2
- 239000011248 coating agent Substances 0.000 claims description 2
- 238000000576 coating method Methods 0.000 claims description 2
- 238000001914 filtration Methods 0.000 claims description 2
- 239000000853 adhesive Substances 0.000 abstract description 4
- 230000001070 adhesive effect Effects 0.000 abstract description 4
- 230000007774 longterm Effects 0.000 abstract description 4
- 238000005070 sampling Methods 0.000 description 6
- 208000024172 Cardiovascular disease Diseases 0.000 description 5
- 238000012544 monitoring process Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000004891 communication Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 150000003071 polychlorinated biphenyls Chemical class 0.000 description 3
- 239000003292 glue Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- LAXBNTIAOJWAOP-UHFFFAOYSA-N 2-chlorobiphenyl Chemical compound ClC1=CC=CC=C1C1=CC=CC=C1 LAXBNTIAOJWAOP-UHFFFAOYSA-N 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- 206010028980 Neoplasm Diseases 0.000 description 1
- 101710149812 Pyruvate carboxylase 1 Proteins 0.000 description 1
- 229910021607 Silver chloride Inorganic materials 0.000 description 1
- 206010040880 Skin irritation Diseases 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- HKZLPVFGJNLROG-UHFFFAOYSA-M silver monochloride Chemical compound [Cl-].[Ag+] HKZLPVFGJNLROG-UHFFFAOYSA-M 0.000 description 1
- 230000036556 skin irritation Effects 0.000 description 1
- 231100000475 skin irritation Toxicity 0.000 description 1
Images
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
- A61B5/6801—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be attached to or worn on the body surface
- A61B5/6802—Sensor mounted on worn items
- A61B5/6804—Garments; Clothes
-
- 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
-
- 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
-
- 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
Abstract
The invention discloses a portable multi-lead electrocardiosignal acquisition system and method based on a capacitive coupling electrode, wherein the coupling electrocardioelectrode is not in direct contact with the skin, a gap capacitive coupling electrocardiosignal is formed between the coupling electrocardiosignal acquisition system and the skin, a signal processing unit is used for obtaining a common-mode interference signal according to the received signal, the compared signal is converted by an A/D (analog/digital) conversion unit and is output by a transmission unit, meanwhile, the common-mode interference signal led out by the signal processing unit is superposed by a right leg driving unit and is fed back to a human body through an inverting amplification circuit to form feedback, and the acquisition mode based on the capacitive coupling electrode is adopted, so that the long-term acquisition of the multi-lead electrocardiosignal can be realized, and the auxiliary of conductive adhesive is not needed in the use process. The double-layer PCB board is a circular PCB board, the outer ring of the coupling electrode is provided with a concentric shielding ring which is arranged at an interval with the coupling electrode, and a gap capacitance coupling electrocardiosignal can be formed between the double-layer PCB board and the skin without sticking the skin.
Description
Technical Field
The invention belongs to an electrocardio acquisition system, and particularly relates to a portable multi-lead electrocardio acquisition system and method based on a capacitive coupling electrode.
Background
With the increasing aging degree of the social population in China, the prevalence of cardiovascular diseases becomes more and more obvious, and the urban life with fast pace, high intensity and great pressure also enables the cardiovascular diseases to be in a young state. At present, the number of patients suffering from cardiovascular diseases is 2.9 hundred million, which accounts for about 20 percent of the population in China, and the mortality rate of cardiovascular diseases is still the top, which is far higher than that of tumors and other diseases, and is still increasing.
Electrocardiographic (ECG) monitoring is used clinically to detect the severity and origin of cardiovascular disease in most patients. The electrocardio-electrode is an important component of the electrocardio-acquisition equipment and can be divided into a wet electrode and a dry electrode according to the principle. At present, most of large medical units adopt wet-type AgCl electrodes, and the electrodes are often used together with conductive adhesive in order to reduce contact resistance in the use process, so that the defects of complex preparation, skin irritation, easy falling off in the long-term monitoring process and the like exist. In order to meet the new medical requirements of future health monitoring and rehabilitation diagnosis and treatment, the dry electrode attracts attention of people. The dry electrode mainly adopts an impedance dry electrode, the metal electrode is directly contacted with the skin to transmit signals, the current signal extraction only stays in a single-channel acquisition mode, the defects of high signal-to-noise ratio and easy interference exist, and the signal processing precision is low; and equipment structure is bigger, carries inconveniently to can't effectively realize long-time monitoring.
Disclosure of Invention
The invention aims to provide a portable multi-lead electrocardio acquisition system and method based on capacitive coupling electrodes, so as to overcome the defects of the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme:
a portable multi-lead electrocardio acquisition system based on a capacitive coupling electrode comprises a coupling electrocardio unit, a signal processing unit, a right leg driving unit, an A/D conversion unit and a transmission unit, wherein the coupling electrocardio electrode comprises two PCBs arranged in parallel and a coupling electrode arranged between the two PCBs, one side of one layer of the PCB is provided with a two-stage amplifying circuit, the output end of the two-stage amplifying circuit is connected with a signal processing unit, the signal processing unit obtains a common-mode interference signal according to the received signal, the received signal is compared with a reference electrode signal to obtain a chest lead electrocardiosignal, the compared signals are converted by the A/D conversion unit and output by the transmission unit, the right leg driving unit is connected with the signal processing unit, and the common-mode interference signals are superposed and fed back to the human body through the electrode by the inverting amplification circuit.
Furthermore, the double-layer PCB board is a circular PCB board, and the outer ring of the coupling electrode is provided with concentric shielding rings which are arranged at intervals with the coupling electrode.
Furthermore, an insulating solder mask layer and copper clad on the top layer are arranged on the PCB provided with the two-stage amplifying circuit, the two-stage amplifying circuit comprises a first-stage instrument operational amplifier and a second-stage general operational amplifier, and a level conversion circuit is connected between the first-stage instrument operational amplifier and the second-stage general operational amplifier.
Further, the primary instrument operational amplifier 5 comprises a primary instrument operational amplifier A01, a resistor R01, a capacitor C01 and a diode RbiasThe reverse input end of the first-level instrument operational amplifier A01 is connected with one end of a resistor R01, the other end of the resistor R01 is connected with a concentric shielding ring, and the same-direction input end of the first-level instrument operational amplifier A01 is connected with one end of a capacitor C01 and a diode RbiasNegative pole of (2), diode RbiasThe positive electrode of the capacitor C01 is connected with the top copper cladding layer, and the other end of the capacitor C01 is connected with the coupling electrode;
the level conversion circuit comprises a capacitor C02 and a resistor R02, wherein one end of the capacitor C02 is connected with the reverse input end of the first-level instrument operational amplifier A01 and the output end of the first-level instrument operational amplifier A01; one end of the resistor R02 is connected with the other end of the capacitor C02, and the other end of the resistor R02 is grounded;
the second-stage general operational amplifier comprises a second-stage general operational amplifier A02 and a resistor R04, wherein one end of the resistor R04 is connected with the output end of the second-stage general operational amplifier A02; the non-inverting input end of the second-stage general operational amplifier A02 is connected with one end of the resistor R02 and the other end of the capacitor C02, and the inverting input end of the second-stage general operational amplifier A02 is connected with the other end of the resistor R04; the other end of the resistor R04 is a signal output end.
Furthermore, the signal processing unit comprises a differential circuit and a three-level filter circuit, wherein the input end of the differential circuit is connected with the coupling electrocardio unit and is used for carrying out unit gain difference on the capacitive coupling electrocardio signal acquired by the channel coupling electrocardio unit and the electrocardio signal of the reference electrode and simultaneously leading out common mode interference of the channel coupling electrocardio unit, and the three-level filter circuit is used for filtering the differential signal to obtain the chest lead electrocardio signal.
Furthermore, the right leg driving unit superposes common mode interference signals led out by the differential circuits on all channels in the signal processing unit and feeds the common mode interference signals back to the human body through the electrodes by the inverting amplification circuit.
Further, the electrocardiogram collecting vest is further included, the electrocardiogram collecting vest adopts an elastic structure, an elastic band is arranged on the outer ring of the electrocardiogram collecting vest, and a chest lead coupling electrocardiogram unit is arranged between the elastic band and the electrocardiogram collecting vest.
Furthermore, the A/D conversion unit is a multi-channel synchronous data acquisition circuit, and is connected with the multi-channel coupled electrocardio unit and the signal processing unit which are connected in parallel.
Furthermore, a sampling holder is arranged between the A/D conversion unit and a channel formed by each group of coupling electrocardio units and the signal processing unit.
A multi-lead electrocardio acquisition method based on a multi-lead electrocardio acquisition system comprises the following steps:
s1, the coupling electrocardio unit is attached to the outer side of the human body in a wearable mode;
and S2, collecting the coupled electrocardiosignals by using the coupled electrocardio unit after being electrified, transmitting the coupled electrocardiosignals to the signal processing unit, obtaining common-mode interference signals by using the signal processing unit according to the received signals, comparing the received signals with reference electrode signals to obtain chest lead electrocardiosignals, converting the compared signals by the A/D conversion unit and outputting the signals by the transmission unit, and simultaneously superposing the common-mode interference signals led out by the signal processing unit by the right leg driving unit and feeding back the common-mode interference signals to the human body by the electrode through the inverting amplification circuit to form feedback.
Compared with the prior art, the invention has the following beneficial technical effects:
the invention relates to a portable multi-lead electrocardiosignal acquisition system based on a capacitive coupling electrode, which is characterized in that the coupling electrocardiosignal is not in direct contact with the skin through the coupling electrocardio electrode, a gap capacitive coupling electrocardiosignal is formed between the coupling electrocardiosignal acquisition system and the skin, a common-mode interference signal is obtained by utilizing a signal processing unit according to the received signal, the compared signal is converted through an A/D (analog/digital) conversion unit and is output through a transmission unit, meanwhile, the common-mode interference signal led out by the signal processing unit is superposed through a right leg driving unit and is fed back to a human body through an inverse amplification circuit through an electrode to form feedback, and the acquisition mode based on the capacitive coupling electrode is adopted, so that the long-term acquisition of the multi-lead electrocardiosignal can be realized, and the acquisition mode does not need the assistance of conductive adhesive in the use process.
Furthermore, the double-layer PCB is a circular PCB, the outer ring of the coupling electrode is provided with a concentric shielding ring which is arranged at an interval with the coupling electrode, so that a gap capacitance coupling electrocardiosignal can be formed between the coupling electrode and the skin, and the skin does not need to be attached.
Furthermore, the multi-electrode arrangement can realize the portable acquisition of standard 12-lead electrocardio and the portable acquisition of multi-lead electrocardio.
Furthermore, the elastic electrocardio acquisition vest is adopted, the coupling electrocardio unit is not in direct contact with the skin, conductive adhesive assistance is not needed, and the measurement preparation is simple; the design of a signal processing circuit is optimized, the volume and the weight of an acquisition system are greatly reduced, and the comfort and the portability of long-term monitoring are favorably ensured; and data are transmitted by adopting wireless Bluetooth communication, so that traditional wired acquisition is avoided, and the application scene of electrocardio acquisition is widened.
Drawings
Fig. 1 is a schematic structural diagram of a coupled electrocardiograph unit according to an embodiment of the present invention.
Fig. 2 is a schematic view of an installation structure of a coupled electrocardiograph unit according to an embodiment of the present invention.
Fig. 3 is a schematic diagram of a signal processing structure of a single channel in a signal processing unit according to an embodiment of the present invention.
Fig. 4 is a schematic structural diagram of a right leg driving unit according to an embodiment of the present invention.
Fig. 5 is a schematic diagram of a connection structure of the a/D conversion unit and the transmission unit in the embodiment of the present invention.
In the figure, 1, a PCB (printed circuit board), 2, a concentric shielding ring, 3, a coupling electrode, 4, a top layer copper coating, 5, a differential operational amplifier for a primary instrument, 6, a secondary general operational amplifier, 7, an electrocardio acquisition vest, 8, an elastic band, 9, an RA electrode, 10, an LA electrode, 11, an RL electrode, 12, an LL electrode, 13, a V1 electrode, 14, a V2 electrode, 15, a V3 electrode, 16, a V4 electrode, 17, a V5 electrode, 18, a V6 electrode, 19, a signal processing unit, an A/D conversion unit and a Bluetooth wireless transmission module
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings:
as shown in figure 1, a portable multi-lead electrocardio-acquisition system based on a capacitive coupling electrode comprises a coupling electrocardio-unit, a signal processing unit, a right leg driving unit, an A/D conversion unit and a transmission unit, wherein the coupling electrocardio-electrode comprises two PCB boards 1 arranged in parallel and a coupling electrode 3 arranged between the two PCB boards 1, one side of one PCB board is provided with a two-stage amplifying circuit, the output end of the two-stage amplifying circuit is connected with the signal processing unit and is used for amplifying and transmitting the capacitive coupling electrocardio-signal acquired by the coupling electrode 3 to the signal processing unit, the signal processing unit obtains a common-mode interference signal according to the received signal, compares the received signal with a reference electrode signal to obtain a chest lead electrocardio-signal, converts the compared signal through the A/D conversion unit and outputs the converted signal through the transmission unit as shown in figure 4, the right leg driving unit is connected with the signal processing unit and used for superposing common mode interference signals led out by the signal processing unit and feeding back the common mode interference signals to a human body through the RL electrode 11 by the inverting amplification circuit.
Specifically, as shown in fig. 1, a double-layer PCB 1 is a circular PCB, a coupling electrode 3 is disposed between the double-layer PCBs 1, a concentric shielding ring 2 disposed at an interval from the coupling electrode 3 is disposed on an outer ring of the coupling electrode 3, a distance between the concentric shielding ring 2 and the coupling electrode 3 is 1.5mm, a ring width is 1mm, a diameter of the coupling electrode is 25mm, and an electrocardiosignal is capacitively coupled by forming a gap with skin; wherein, the PCB board provided with the two-stage amplifying circuit is provided with an insulating solder mask layer and a top copper-clad layer 4, and the top copper-clad layer 4 is a signal ground of the coupling electrode 3. The two-stage amplifying circuit comprises a first-stage instrument operational amplifier 5 and a second-stage general operational amplifier 6, and a level conversion circuit is connected between the first-stage instrument operational amplifier 5 and the second-stage general operational amplifier 6; the amplification factor of the first-level instrument operational amplifier 5 is 50 times, the amplification factor of the second-level general operational amplifier 6 is 20 times, and the total amplification factor is 1000 times.
The primary instrument operational amplifier 5 comprises a primary instrument operational amplifier A01, a resistor R01, a capacitor C01 and a diode RbiasThe reverse input end of the first-level instrument operational amplifier A01 is connected with one end of a resistor R01, the other end of the resistor R01 is connected with the concentric shielding ring 2, and the same-direction input end of the first-level instrument operational amplifier A01 is connected with one end of a capacitor C01 and a diode RbiasNegative pole of (2), diode RbiasThe positive electrode of the capacitor C01 is connected with the top copper clad layer 4, and the other end of the capacitor C01 is connected with the coupling electrode 3;
the level conversion circuit comprises a capacitor C02 and a resistor R02, wherein one end of the capacitor C02 is connected with the reverse input end of the first-level instrument operational amplifier A01 and the output end of the first-level instrument operational amplifier A01; one end of the resistor R02 is connected with the other end of the capacitor C02, and the other end of the resistor R02 is grounded;
the second-stage general operational amplifier 6 comprises a second-stage general operational amplifier A02 and a resistor R04, wherein one end of the resistor R04 is connected with the output end of the second-stage general operational amplifier A02; the non-inverting input end of the second-stage general operational amplifier A02 is connected with one end of the resistor R02 and the other end of the capacitor C02, and the inverting input end of the second-stage general operational amplifier A02 is connected with the other end of the resistor R04; the other end of the resistor R04 is a signal output end. The primary instrument operational amplifier 5 and the secondary general operational amplifier 6 have low bias current and low noise, and improve the data acquisition precision.
As shown in fig. 3, the signal processing unit includes a differential circuit and a three-stage filter circuit, wherein an input end of the differential circuit is connected to the coupling electrocardiograph unit, and is configured to perform unit gain difference between the capacitively coupled electrocardiograph signal acquired by the channel coupling electrocardiograph unit and the electrocardiograph signal of the reference electrode (RA electrode 9), and simultaneously introduce common mode interference of the channel coupling electrocardiograph unit; the three-stage filter circuit comprises a 4-stage active Butterworth high-pass filter, a double T-shaped notch filter and a 4-stage active Butterworth low-pass filter which are sequentially connected in series, the lower limit frequency of the three-stage filter circuit is 0.1Hz, the upper limit frequency of the three-stage filter circuit is 200Hz, the notch frequency of the three-stage filter circuit is 50Hz, and the gain in a pass band range is kept at 0 dB; eight-channel signal acquisition is adopted, namely eight coupling electrocardiounits are connected, and a signal processing unit realizes signal processing of 8 channels, as shown in fig. 2, channel coupling electrodes (coupling electrocardiounits) corresponding to 8 channels are respectively an LA electrode 10, an LL electrode 12, a V1 electrode 13, a V2 electrode 14, a V3 electrode 15, a V4 electrode 16, a V5 electrode 17 and a V6 electrode 18; the operational amplifier and the differential amplifier are both powered by bipolar +/-3V.
The electrocardio collecting vest 7 is characterized by further comprising an electrocardio collecting vest 7, the electrocardio collecting vest 7 is of an elastic structure, a cushion layer such as a cotton layer is arranged in the electrocardio collecting vest, an elastic band 8 is arranged on a chest lead of the electrocardio collecting vest 7 at present, a chest lead coupling electrocardio unit (V1-V6 electrode) is arranged between the elastic band 8 and the electrocardio collecting vest 7, and the rest electrodes are adhered to the electrocardio vest through insulating glue; the application adopts a parallel structure of a plurality of coupled electrocardio units; 1-8 paths of coupling electrocardiounits can be adopted according to the situation; as shown in figure 2, 10 coupled electrocardio units are fixed on an electrocardio acquisition vest 7 by insulating glue according to electrocardiogram chest leads, and the 10 coupled electrocardio units form 8 input channels.
As shown in fig. 5, the a/D conversion unit is a multi-channel synchronous data acquisition circuit, and specifically adopts an 8-channel synchronous data acquisition circuit to realize synchronous acquisition of 8-channel output signals in the signal unit; by adopting a time-sharing conversion system, 8 analog signal input channels are respectively provided with a sampling holder (S/H), and all the channels share one A/D converter. The single chip microcomputer is used for the analog switch of the multiplexer to access each path of the sampling holders to the A/D converter in a time-sharing mode for control, and synchronous sampling of 8 paths of signals is achieved. The A/D converter has 12 bits, the sampling rate is not lower than 5kHz, and the sampling precision is 0.1 mV.
The transmission unit adopts a wired transmission or wireless transmission module, and directly transmits signals to a signal receiving system through a cable by utilizing wired transmission, and the signal receiving system is a computer or a background control system. The wireless transmission module adopts a Bluetooth wireless transmission module, is controlled by a singlechip, specifically adopts a Bluetooth 4.0 low-power module, has a serial port communication baud rate of 9600bit/s, has a highest transmission rate of 1Mbps and has an effective transmission distance of 20 meters.
When acquiring electrocardiosignals, a measurer only needs to install a 3V button battery, put on the elastic electrocardio acquisition vest, finely adjust the position of the electrode and tighten the elastic band, and then the chest lead electrocardio signals can be measured; the capacitive coupling electrocardio-electrodes are not in direct contact with the skin, the electrocardiosignals are capacitively coupled through gaps formed between the capacitive coupling electrocardio-electrodes and the skin, 8-channel electrocardio-signals can be synchronously acquired by arranging 10 coupling electrodes, and the standard 12-lead electrocardio-signals can be further obtained based on the operational relationship between leads; signals in each channel are amplified 1000 times by a two-stage amplifying circuit on a channel coupling electrode and input into a signal processing unit, are contrasted with a reference electrode, and sequentially pass through a differential circuit and a three-stage filter circuit; and finally, the output signals of the 8 channels pass through an A/D conversion circuit and a Bluetooth communication module to obtain the output standard 12-lead electrocardiosignals.
Claims (10)
1. A portable multi-lead electrocardio-acquisition system based on a capacitive coupling electrode is characterized by comprising a coupling electrocardio unit, a signal processing unit, a right leg driving unit, an A/D conversion unit and a transmission unit, wherein the coupling electrocardio-electrode comprises two PCB boards (1) which are arranged in parallel and a coupling electrode (3) which is arranged between the two PCB boards (1), one side of one layer of the PCB is provided with a two-stage amplifying circuit, the output end of the two-stage amplifying circuit is connected with a signal processing unit, the signal processing unit obtains a common-mode interference signal according to the received signal, the received signal is compared with a reference electrode signal to obtain a chest lead electrocardiosignal, the compared signals are converted by the A/D conversion unit and output by the transmission unit, the right leg driving unit is connected with the signal processing unit, and the common-mode interference signals are superposed and fed back to the human body through the electrode by the inverting amplification circuit.
2. The portable multi-lead electrocardio-acquisition system based on the capacitive coupling electrode as claimed in claim 1, wherein the double-layer PCB (1) is a circular PCB, and the outer ring of the coupling electrode (3) is provided with a concentric shielding ring (2) which is arranged at an interval with the coupling electrode (3).
3. The portable multi-lead electrocardio acquisition system based on the capacitive coupling electrode is characterized in that an insulating solder mask layer and a copper coating (4) on the top layer are arranged on a PCB provided with a two-stage amplification circuit, the two-stage amplification circuit comprises a first-stage instrument operational amplifier (5) and a second-stage general operational amplifier (6), and a level conversion circuit is connected between the first-stage instrument operational amplifier (5) and the second-stage general operational amplifier (6).
4. The portable multi-lead ECG collection system based on capacitive coupling electrode as claimed in claim 3, wherein the primary instrument operational amplifier 5 comprises a primary instrument operational amplifier A01, a resistor R01, a capacitor C01 and a diode RbiasThe reverse input end of the first-level instrument operational amplifier A01 is connected with one end of a resistor R01, the other end of the resistor R01 is connected with a concentric shielding ring (2), and the same-direction input end of the first-level instrument operational amplifier A01 is connected with one end of a capacitor C01 and a diode RbiasNegative pole of (2), diode RbiasThe positive electrode of the capacitor C01 is connected with the top copper cladding layer (4), and the other end of the capacitor C01 is connected with the coupling electrode (3);
the level conversion circuit comprises a capacitor C02 and a resistor R02, wherein one end of the capacitor C02 is connected with the reverse input end of the first-level instrument operational amplifier A01 and the output end of the first-level instrument operational amplifier A01; one end of the resistor R02 is connected with the other end of the capacitor C02, and the other end of the resistor R02 is grounded;
the secondary general operational amplifier (6) comprises a secondary general operational amplifier A02 and a resistor R04, wherein one end of the resistor R04 is connected with the output end of the secondary general operational amplifier A02; the non-inverting input end of the second-stage general operational amplifier A02 is connected with one end of the resistor R02 and the other end of the capacitor C02, and the inverting input end of the second-stage general operational amplifier A02 is connected with the other end of the resistor R04; the other end of the resistor R04 is a signal output end.
5. The portable multi-lead electrocardiogram acquisition system based on capacitive coupling electrodes as claimed in claim 1 wherein the signal processing unit comprises a differential circuit and a three-stage filter circuit, the input end of the differential circuit is connected to the coupled electrocardiogram unit for performing unit gain difference between the capacitively coupled electrocardiogram signal acquired by the channel coupled electrocardiogram unit and the electrocardiogram signal of the reference electrode and simultaneously introducing common mode interference of the channel coupled electrocardiogram unit, the three-stage filter circuit is used for filtering the differentiated signals to obtain chest lead electrocardiogram signals.
6. The portable multi-lead electrocardio-acquisition system based on the capacitive coupling electrode as claimed in claim 5, wherein the right leg driving unit superposes the common mode interference signals led out by the differential circuits on all channels in the signal processing unit and feeds back the common mode interference signals to the human body through the electrode by the inverting amplification circuit.
7. The portable multi-lead electrocardio acquisition system based on the capacitive coupling electrode is characterized by further comprising an electrocardio acquisition vest (7), wherein the electrocardio acquisition vest (7) adopts an elastic structure, an elastic band (8) is arranged on the outer ring of the electrocardio acquisition vest (7), and a chest lead coupling electrocardio unit is arranged between the elastic band (8) and the electrocardio acquisition vest (7).
8. The portable multi-lead electrocardiograph acquisition system based on the capacitive coupling electrode according to claim 1, wherein the a/D conversion unit is a multi-channel synchronous data acquisition circuit, and the a/D conversion unit is connected with the multi-channel coupled electrocardiograph unit and the signal processing unit in parallel.
9. The portable multi-lead electrocardiographic acquisition system based on capacitive coupling electrodes according to claim 8 wherein a sample holder is disposed between the a/D conversion unit and the channel formed by each set of coupled electrocardiographic units and signal processing unit.
10. A multi-lead electrocardiographic acquisition method based on the multi-lead electrocardiographic acquisition system according to claim 1, characterized by comprising the steps of:
s1, the coupling electrocardio unit is attached to the outer side of the human body in a wearable mode;
and S2, collecting the coupled electrocardiosignals by using the coupled electrocardio unit after being electrified, transmitting the coupled electrocardiosignals to the signal processing unit, obtaining common-mode interference signals by using the signal processing unit according to the received signals, comparing the received signals with reference electrode signals to obtain chest lead electrocardiosignals, converting the compared signals by the A/D conversion unit and outputting the signals by the transmission unit, and simultaneously superposing the common-mode interference signals led out by the signal processing unit by the right leg driving unit and feeding back the common-mode interference signals to the human body by the electrode through the inverting amplification circuit to form feedback.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110593873.8A CN113180676A (en) | 2021-05-28 | 2021-05-28 | Portable multi-lead electrocardiogram acquisition system and method based on capacitive coupling electrode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110593873.8A CN113180676A (en) | 2021-05-28 | 2021-05-28 | Portable multi-lead electrocardiogram acquisition system and method based on capacitive coupling electrode |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113180676A true CN113180676A (en) | 2021-07-30 |
Family
ID=76986241
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110593873.8A Pending CN113180676A (en) | 2021-05-28 | 2021-05-28 | Portable multi-lead electrocardiogram acquisition system and method based on capacitive coupling electrode |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113180676A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113662553A (en) * | 2021-08-03 | 2021-11-19 | 复旦大学 | Non-contact cardiopulmonary signal measurement system |
| CN113925514A (en) * | 2021-09-28 | 2022-01-14 | 西安交通大学 | Portable multi-lead ECG acquisition system and data processing method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102090885A (en) * | 2010-12-03 | 2011-06-15 | 浙江大学 | Multichannel human body skin potential acquiring system |
| CN202699135U (en) * | 2012-04-27 | 2013-01-30 | 东南大学 | A wireless wearable electrocardiogram chest belt based on non-contact electrodes |
| CN103815899A (en) * | 2014-03-07 | 2014-05-28 | 华中科技大学 | Non-contacting electrocardio electrode module and electrocardiogram detector |
| JP2018094412A (en) * | 2016-12-14 | 2018-06-21 | 国立大学法人 名古屋工業大学 | Wearable biological sensor and noise cancel circuit |
| CN109171702A (en) * | 2018-07-05 | 2019-01-11 | 廖优义 | A kind of measuring device and measurement method of contactless electrocardiosignal |
| CN109805922A (en) * | 2019-01-24 | 2019-05-28 | 复旦大学 | Contactless electrocardio measuring system |
-
2021
- 2021-05-28 CN CN202110593873.8A patent/CN113180676A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102090885A (en) * | 2010-12-03 | 2011-06-15 | 浙江大学 | Multichannel human body skin potential acquiring system |
| CN202699135U (en) * | 2012-04-27 | 2013-01-30 | 东南大学 | A wireless wearable electrocardiogram chest belt based on non-contact electrodes |
| CN103815899A (en) * | 2014-03-07 | 2014-05-28 | 华中科技大学 | Non-contacting electrocardio electrode module and electrocardiogram detector |
| JP2018094412A (en) * | 2016-12-14 | 2018-06-21 | 国立大学法人 名古屋工業大学 | Wearable biological sensor and noise cancel circuit |
| CN109171702A (en) * | 2018-07-05 | 2019-01-11 | 廖优义 | A kind of measuring device and measurement method of contactless electrocardiosignal |
| CN109805922A (en) * | 2019-01-24 | 2019-05-28 | 复旦大学 | Contactless electrocardio measuring system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113662553A (en) * | 2021-08-03 | 2021-11-19 | 复旦大学 | Non-contact cardiopulmonary signal measurement system |
| CN113925514A (en) * | 2021-09-28 | 2022-01-14 | 西安交通大学 | Portable multi-lead ECG acquisition system and data processing method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108378844A (en) | A kind of portable cardiac detection device and cardioelectric monitor system based on electronics epidermis | |
| CN113180676A (en) | Portable multi-lead electrocardiogram acquisition system and method based on capacitive coupling electrode | |
| KR20110004660A (en) | Apparatus for measuring physiological signals | |
| CN108113660B (en) | Portable multi-biological signal amplifier | |
| CN203354539U (en) | Portable electrocardio multi-lead monitoring device | |
| CN102415878A (en) | Life physical sign monitoring device | |
| CN103908241B (en) | Sleep and respiration detection method, device | |
| CN102488511A (en) | 3G (The 3rd Generation Telecommunication) electro-cardio monitoring system | |
| CN105054923A (en) | Electrocardiogram detection device | |
| CN113040777B (en) | Multimode physiological signal sensor interface chip, detector and brain state monitor | |
| WO2018129718A1 (en) | Device and method for use in detecting electrocardio signals | |
| CN102488510A (en) | Wireless body surface bioelectricity collection device | |
| CN204744156U (en) | Guardianship device based on wireless biomedical sensing | |
| CN205041429U (en) | Portable electrocardio and heart sound signal acquisition equipment | |
| CN112022101A (en) | Implanted brain-computer interface based on human body medium information and energy transmission | |
| CN115192005A (en) | Portable electrocardiogram and seismogram combined acquisition system and data processing method | |
| CN113229822A (en) | Portable multi-lead electroencephalogram acquisition system based on capacitive coupling electrode | |
| Chien et al. | Microcontroller-based wireless recorder for biomedical signals | |
| CN105054961A (en) | Portable electrocardio and heart sound signal collection equipment | |
| CN205054167U (en) | Narrow harmless diagnostic system of coronary | |
| CN205338943U (en) | Wireless long -distance electrocardio monitoring system | |
| CN204813872U (en) | Heart electric detection means | |
| CN206197932U (en) | Intelligence based on PPG and ECG is without Tail cuff blood pressure health monitoring wrist-watch | |
| CN215227727U (en) | Portable multi-lead electroencephalogram acquisition system based on capacitive coupling electrode | |
| Yang et al. | A multi-parameter bio-electric ASIC sensor with integrated 2-wire data transmission protocol for wearable healthcare system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |