CN205268157U - Non -contact heart electric sensor and wearable multichannel electrocardio sampling underwear thereof - Google Patents
Non -contact heart electric sensor and wearable multichannel electrocardio sampling underwear thereof Download PDFInfo
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- CN205268157U CN205268157U CN201521034699.XU CN201521034699U CN205268157U CN 205268157 U CN205268157 U CN 205268157U CN 201521034699 U CN201521034699 U CN 201521034699U CN 205268157 U CN205268157 U CN 205268157U
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Abstract
Non -contact heart electric sensor and wearable multichannel electrocardio sampling underwear thereof relates to human body or the human respectively measurement of the biological electricity signal of part, especially relates to a wearable multichannel electrocardio sampling underwear that is used for electrocardiography's sensor and uses this sensor, and heart electric sensor includes that the detecting element who forms at the PCB intralamellar part enlargies the module with the electrocardiosignal of subsides dress on the PCB board, the bottom wiring layer of PCB board divides detection electrode into and encircles detection electrode's shield ring, the jogged joint shield ring of crossing along the shield ring equipartition forms three -dimensional shielding cavity with the shielding layer, detection electrode acquires the electrocardiosignal with non - contact through the capacitance coupling. A plurality of solitary small -size non -contact heart electric sensor distribute inboardly at electrocardio sampling underwear to multichannel differential input mode is connected to electrocardio appearance host computer, and in the daily electromagnetic environment who has the radio signal interference, the electrocardiosignal of gathering has the professional medical electrocardio appearance tradition measurement mode's that can compare signal quality.
Description
Technical field
The utility model relates to the measurement of the bioelectrical signals of human body or human body each several part, particularly relates to a kind of sensor for electrocardiogram(ECG art and uses the wearable hyperchannel electrocardio sampling underwear of this sensor.
Background technology
The pathology of heart is a process slowly, and normal people is difficult to aware the subtle change of heart. And often having property sudden, of short duration and very big danger, therefore patient also must conveniently carry out cardioelectric monitor in real time. Real-time monitoring and early warning are carried out for some high-risk client need, thus avoids dangerous generation. But, existing consumer electrocardio product still cannot obtain the electrocardiosignal of similar specialty dynamic hyperchannel electrocardio instrument (such as Holter), and the electrocardiosignal of similar Holter is only the Medicine standard of diagnosis heart disease and cardiac physiology. At present in North America, have there are some consumer products relevant to electrocardio in Europe and market, China's Mainland, such as export real-time heart rate, the i.e. intelligent watch of every minute beats, brassiere formula or pectoral girdle formula heart rate instrument, estimate that the one hand of heart rate refers to optics heart rate instrument by blood by pulse change, it may also be useful to the both hands that each finger in left and right obtains electrocardiosignal refer to electrocardio instrument, and use a traditional wet electrodes to obtain the single passage electrocardio instrument etc. of electrocardiosignal in chest. Relative to the high cost of the Renminbi ten thousand yuan of levels medical electrocardio instrument (Holter) of specialty, the consumer electrocardio product of these hundreds of to thousands of units levels is more suitable for ordinary populace undoubtedly, and their easy donning is better than Holter with the feature that can output signal in real time, thus can greatly improve the popular understanding to self health of heart. In the consumer product that these electrocardios are relevant, the only exportable heart real time signal of latter two, thus closest to Holter. But, owing to both hands refer to that electrocardio instrument needs user to use both hands just can complete record, affect daily life and the work of user, so discrete electrocardiosignal can only be obtained, and be limited by electrode and be positioned at finger, away from heart, its quality of output signals is limited. And single passage electrocardio instrument is limited at immunity from interference, such as cannot effectively catch heartbeat and the clear electrocardiosignal of monitoring when moving user. It thus is seen that all cannot obtain high quality hyperchannel electrocardiosignal due to these consumer products, its information medical science physiological significance obtained is limited, is still not enough to for diagnosing heart disease and monitoring cardiac physiology.
Chinese invention patent " a kind of Novel intelligent electrocardiogram test healthcare apparatus " (patent of invention number: ZL201010539911.3 Authorization Notice No.: CN102462494B) discloses a kind of Novel intelligent electrocardiogram test healthcare apparatus, electrocardiosignal is obtained by biological electrode, electrocardiosignal is amplified by employing signal processing chip, A/D changes, the process such as suppression, ac filter, electrocardio filtering and contact detection of drifting about, and obtains high-quality electrocardio collection of illustrative plates. The computer software analysis treatment unit being connected and installed on PC, notebook computer, online basis, mobile telephone by communication interface module carrys out record analysis ecg wave form for clinical examination reference, has the functions such as test heartbeat, pressure detection, pressure of relaxing interaction, electrocardiogram(ECG medical monitoring, identification, mood test. This technical scheme adopts two variable threshold method (i.e. crest threshold value and trough threshold value) to carry out judging and processing. But, in strongly disturbing situation, the horizontal baseline of such as acquired signal is unstable, containing obvious flesh electrical signal, or cause because moving electron device noise time, this threshold method obviously cannot ensure to catch the efficiency of electrocardiosignal. In addition, the threshold method seizure moment usually can not be accurate. Because under noise jamming, threshold value can not clear embodiment relative to the position of R ripple, namely distance R ripple is relatively far away sometimes, and sometimes relatively near, such rhythm of the heart estimates there is very big error. Even if threshold value can be arranged again, complicated and harsh practical situation also cannot be met.
Chinese invention patent " mobile terminal of a kind of noncontact formula cardioelectric monitor and cardioelectric monitor method " (patent of invention number: ZL201110328284.3 Authorization Notice No.: CN102512153B) discloses a kind of mobile terminal and the cardioelectric monitor method of noncontact formula cardioelectric monitor, and this cardioelectric monitor method comprises: mobile terminal gathers, by noncontact formula mode, the signal comprising electrocardiogram (ECG) data; Described mobile terminal the electrocardiogram (ECG) data in described signal is carried out denoising and and other data separating process; Described mobile terminal goes out electrocardiogram (ECG) data from the extracting data after separating treatment; The electrocardiogram (ECG) data extracted is sent to appointment receiving equipment by mobile radio networks by described mobile terminal. The prior art scheme adopts the method for little wave conversion, first filters noise, then reconstructs electrocardiosignal. Thus reduce noise cleverly to the impact catching heartbeat. But, owing to filter and reconstruction can bring certain influence to original signal, this may cause electrocardiosignal distortion, so that cannot obtain high quality electrocardiosignal, it is difficult to for diagnosing heart disease and monitoring cardiac physiology.
Chinese invention patent " a kind of noncontact formula EGC sensor and application thereof " (patent of invention number: ZL201210128390.1 Authorization Notice No.: CN102657524B) discloses a kind of noncontact formula EGC sensor, adopt circular double-face pcb board electrode, a face is provided with three districts, electrical isolation between three districts, center circle district is sensing chip, outwards it is provided with annular shadow zone and annular ground wire district successively, another face is also provided with three districts, center circle is Fu Tong district, deposited copper zone center is provided with and comprises preamplifier, the paster welding zone of front end filter, periphery, Fu Tong district is annular ground wire district, the region that sensing chip and adjacent annular shadow zone are jointly shared and Shang Futong district, another face are symmetrical, annular ground wire district on two faces is symmetrical, the output terminal of preamplifier is connected with annular Ji Futong district, shadow zone respectively, the ground end of preamplifier is connected with the annular ground wire district on two faces respectively, the input of preamplifier connects the output of sensing chip. double-sided PCB board positioning of electrode shields the uncovered end of box at circular metal, be provided with sensing chip one facing to uncovered, be provided with Fu Tong district one facing to shielding box inner chamber. the sensing chip of this technical scheme is exposed, it is necessary to wear a underwear by user or T-shirt reaches " insulation " relatively. owing to clothes is under certain conditions (as user's perspire or air are moist), its insulation degree will reduce (even lower to K ohm level) greatly, the method for this technical scheme the electric insulation in non-critical meaning. in electrocardio is measured, skin and electrode contact not only can cause polarizing voltage, and there is polarization resistance in the contact between electrode and skin, the movement of measured's health also can cause polarization resistance impedance value to change, polarization resistance can be regarded as whole Circuits System source resistance, carrying out dividing potential drop with the input resistance of pre-amplification circuit, the polarization resistance of change also can cause the dividing potential drop output of pre-amplification circuit to play pendulum.
Chinese invention patent application " remote ecg monitoring and fault diagnosis system " (application for a patent for invention number: 201510096714.1 publication numbers: CN104644159A) discloses a kind of monitoring diagnosis system, comprise for gathering and the electrocardio-data collection unit of electrocardiosignal can be stored, described electrocardio-data collection unit with for receiving and the mobile terminal carrying out electrocardiosignal display be connected, described mobile terminal is connected with ecg analysis platform by network; The electrocardiosignal of mobile terminal transmission can be carried out analyzing and processing by ecg analysis platform. In order to system miniatureization, above-mentioned prior art all adopts and stores or the storage of little capacity this locality without local, or use low precision to record the data processing method of (reduce data store pressure) in short-term, or the electrocardiogram (ECG) data collected wirelessly is transferred to external reception device storage also. But, if user present position exceeds wireless signal covers region, or on-the-spot serious interference, above-mentioned prior art is easy to cause the permanent loss of data, it is difficult to ensure the integrity of real time data.
On the other hand, traditional wet electrode adopts passive design, its volume and installation area all less (diameter about 1cm), but not contact electrode adopts active devises usually, volume and installation area are all relatively big, add the difficulty that electrode is laid, reduce users'comfort. In addition, the input resistance of noncontact formula electrode is G ohm level, neighbourhood noise is very responsive, very easily cause back end signal conditioning circuit saturated, therefore, how to reduce the volume of noncontact formula electrode and area is installed, improve the shield effectiveness of electrode, improving the signal to noise ratio of input ecg signal, promotion signal quality is also the technical problem that wearable real time multi-channel noncontact formula electrocardio instrument must solve.
Practical novel content
The purpose of this utility model is to provide a kind of EGC sensor for wearable real time multi-channel noncontact formula electrocardio instrument, it is possible to low cost obtains to be possessed information medical science physiological significance, can be used in diagnosis heart disease and monitor the high quality hyperchannel electrocardiosignal of cardiac physiology.
The utility model solves the problems of the technologies described above the technical scheme adopted:
A kind of noncontact formula EGC sensor, for wearable real time multi-channel noncontact formula electrocardio instrument, it is characterised in that:
Described EGC sensor is made up of one piece of circular pcb board in independent 4 layer, it is included in the measuring element that 4 layers of circular pcb board inside are formed, and it is mounted on electrocardiosignal amplification module and the four-core unitor of 4 layers of circular pcb board layer top layer wiring layer, described electrocardiosignal amplification module is connected to described measuring element, the output terminal of described electrocardiosignal amplification module, is coupled through signal conductor via four-core and is connected to electrocardio instrument main frame; The second layer of described 4 layers of circular pcb board all applies copper and forms screen layer; Described 4 layers of circular pcb board third layer are interior wiring layer, and power supply and signal for EGC sensor inside connect;
Described measuring element adopts multi-layer PCB technique to be formed, and is made up of the three-dimensional mask chamber of detecting electrode and encirclement detecting electrode: the bottom wiring layer of described 4 layers of circular pcb board is divided into the detecting electrode being positioned at pcb board center and the shield ring around detecting electrode; Some the cross holes uniform along shield ring connect shield ring and screen layer, form the three-dimensional mask chamber of cage modle three-dimensional arrangement; The outside surface entirety of described bottom wiring layer covers welding resistance insulation layer, forms the high resistance electrical isolation between detecting electrode and human body skin, and described detecting electrode obtains electrocardiosignal by condenser coupling in a non contact fashion;
Described detecting electrode is connected to the in-phase input end of electrocardiosignal amplification module by stopping condenser; Described three-dimensional mask chamber is connected to the reverse input terminus of electrocardiosignal amplification module by resistance, to eliminate external interference signal to the impact of detecting electrode.
The one preferably technical scheme of noncontact formula EGC sensor of the present utility model, it is characterized in that the diameter of described 4 layers of circular pcb board is 2.8cm, described detecting electrode is the annular Fu Tong district of diameter 2.5cm, described shield ring is the annular Fu Tong district of width 1.4mm, leaves the clearance for insulation of 0.1mm between described detecting electrode and shield ring.
A kind of better technical scheme of noncontact formula EGC sensor of the present utility model, it is characterized in that described four-core unitor is 3.5mm four-core audio frequency socket, the output terminal of described electrocardiosignal amplification module can reach 50cm audio signal wires by length and be connected to electrocardio instrument main frame.
Another object of the present utility model is to provide a kind of wearable hyperchannel electrocardio sampling underwear using above-mentioned noncontact formula EGC sensor, solves low cost and obtains the technical problem possessing information medical science physiological significance, can be used in diagnosing the high quality hyperchannel electrocardiosignal of heart disease and monitoring cardiac physiology. The present invention solves the problems of the technologies described above the technical scheme adopted:
A kind of wearable hyperchannel electrocardio sampling underwear using above-mentioned noncontact formula EGC sensor, comprise at least 3 EGC sensors being placed in and being connected to electrocardio instrument main frame, it is characterised in that: described EGC sensor is connected to the electrocardio sampling unit of electrocardio instrument main frame by four-core unitor; Described electrocardio sampling unit is connected and composed by instrument amplifier and eight channel modulus converters of each electrocardiosignal passage; The instrument of each electrocardiosignal passage amplifier connects in multichannel Differential Input mode, by the hyperchannel electrocardiosignal that EGC sensor obtains, send the signal processing unit of electrocardio instrument main frame to, wherein, first EGC sensor, as shared difference negative pole, is connected in parallel with the inverting input of the instrument amplifier of each road independence electrocardiosignal passage; All the other each EGC sensors, as each road independence electrocardiosignal passage difference positive pole, are connected respectively to the in-phase input end of the instrument amplifier of each electrocardiosignal passage; From each road electrocardiosignal of EGC sensor, through instrument with, after amplifier high power differential amplification, being sent to the corresponding analog input passage of eight channel modulus converters respectively, electrocardio sampled signal is converted to numerary signal.
The one preferably technical scheme of wearable hyperchannel electrocardio of the present utility model sampling underwear, characterized by further comprising the warning unit on the middle top being configured in elasticity dress material front, described warning unit comprises the mini microphone and alarm button that are connected to electrocardio instrument main frame, carry out the speech signal of typing oneself by pinning alarm button in emergency circumstances wearer, and send alert message to the intelligent terminal connected by electrocardio instrument main frame, or pass through public data communication network by alarm message Auto broadcast to client service center or medical first aid center.
A kind of better technical scheme of wearable hyperchannel electrocardio of the present utility model sampling underwear, it is characterised in that described electrocardio sampling underwear configures the EGC sensor described in 6; Described electrocardio sampling unit comprises 6 instrument amplifiers connected in multichannel Differential Input mode; Described EGC sensor configures according to the ECG electrode position of routine, to obtain the hyperchannel electrocardiosignal of the medical electrocardio instrument of similar specialty.
The beneficial effects of the utility model are:
1, noncontact formula EGC sensor of the present utility model adopts the measuring element formed in pcb board inside, substantially reduce the volume of sensor and area is installed, wearable real time multi-channel noncontact formula electrocardio instrument can be laid in the chest space of comparable size and arrange more electrode, thus improve the spatial resolution of electrocardiosignal sampling.
2, wearable hyperchannel electrocardio of the present utility model sampling underwear, adopt multiple little size noncontact formula EGC sensor separately, with multi-channel differential input mode, the signal conductor that can be reached 50cm by length is connected to electrocardio instrument main frame, in the daily electromagnetic environment that there is the interference of the wireless signal such as mobile phone signal and WiFi, the electrocardiosignal collected has the signal quality of professional medical electrocardio instrument Holter traditional measurement mode of can comparing.
Accompanying drawing explanation
Fig. 1 is noncontact formula EGC sensor three-dimensional structure schematic diagram of the present utility model;
Fig. 2 is the structure sectional view of noncontact formula EGC sensor of the present utility model;
Fig. 3 is the sensitive surface sectional view of noncontact formula EGC sensor of the present utility model;
Fig. 4 is the chest configuration scheme schematic diagram of wearable hyperchannel electrocardio of the present utility model sampling underwear;
Fig. 5 is the waist configuration scheme schematic diagram of wearable hyperchannel electrocardio of the present utility model sampling underwear;
Fig. 6 is the shoulder configuration scheme schematic diagram of wearable hyperchannel electrocardio of the present utility model sampling underwear;
Fig. 7 is the schematic circuit diagram of the wearable real time multi-channel noncontact formula electrocardio instrument using the utility model EGC sensor;
Fig. 8 is the electrocardio instrument main frame schematic diagram of wearable real time multi-channel noncontact formula electrocardio instrument of the present utility model;
Fig. 9 is the machine learning method schema of wearable real time multi-channel noncontact formula electrocardio instrument of the present utility model;
Figure 10 is the heartbeat method of estimation schema of wearable real time multi-channel noncontact formula electrocardio instrument of the present utility model.
In figure, 1-layer top layer wiring layer, 2-electrocardiosignal amplification module, 201-prime amplifier, 202-two stage amplifier, 3-four-core unitor, 4-screen layer, wiring layer in 5-, 6-detecting electrode, 7-shield ring, 8-crosses hole, 9-welding resistance insulation layer, 10-measuring element, 20-electrocardio instrument main frame, 21-electrocardio sampling unit, 211-instrument amplifier, 212-analog to digital converter, 22-signal processing unit, 221-level one data buffer memory, 222-heartbeat capture module, 223-mass storage, 224-secondary data buffer memory, 225-Web server, 23-wireless transmission unit, 30-intelligent terminal, 40-elasticity dress material, 50-warning unit, Hs-EGC sensor H1��H6.
Embodiment
In order to technique scheme of the present utility model can be understood better, carry out describing in detail further below in conjunction with drawings and Examples.
One group of embodiment of wearable real time multi-channel noncontact formula electrocardio instrument of the present utility model is as shown in Fig. 4 to 7, it is made up of electrocardio instrument main frame 20 and k independent little size noncontact formula EGC sensor Hs, wherein s=1��k, 9 >=k >=3, described EGC sensor Hs can reach the signal conductor of 50cm by length, is connected to electrocardio instrument main frame 20 with multi-channel differential input mode; Each EGC sensor Hs is made up of 4 layers of circular pcb board of one piece of independent diameter 2.8cm; In three kinds of configuration embodiments of Fig. 4 to Fig. 6, k=6, is configured with 6 EGC sensor H1��H6 at elasticity dress material 40 chest; In three kinds of configuration embodiments of Fig. 4 to Fig. 6, described EGC sensor H1��H6 is distributed in conventional ECG electrode position, to obtain the hyperchannel electrocardiosignal of the medical electrocardio instrument (Holter) of similar specialty.
For noncontact formula EGC sensor of the present utility model an embodiment as shown in Figures 1 to 3, it is included in the measuring element 10 that 4 layers of circular pcb board inside are formed, and it is mounted on electrocardiosignal amplification module 2 and the four-core unitor 3 of 4 layers of circular pcb board layer top layer wiring layer; Described electrocardiosignal amplification module 2 is connected to described measuring element 10, and EGC sensor Hs is connected to electrocardio instrument main frame 20 by described four-core unitor 3; Described electrocardiosignal amplification module 2 and four-core unitor 3 are mounted on the layer top layer wiring layer 1 of 4 layers of circular pcb board; The second layer of described 4 layers of circular pcb board all applies copper and forms screen layer 4; Described 4 layers of circular pcb board third layer are interior wiring layer 5, and power supply and signal for EGC sensor inside connect;
Described measuring element 10 adopts multi-layer PCB technique to be formed, it is made up of the three-dimensional mask chamber of detecting electrode 6 and encirclement detecting electrode 6: the bottom wiring layer of described 4 layers of circular pcb board is divided into detecting electrode 6 and shield ring 7, described detecting electrode 6 is the circular Fu Tong district of diameter 2.5cm, is positioned at 4 layers of circular pcb board center; Described shield ring 7 is the annular Fu Tong district of width 1.4mm, is positioned in circular pcb board outer ring; The clearance for insulation of 0.1mm is left between described detecting electrode 6 and shield ring 7; Hole 8 of crossing along uniform 40 of shield ring 7 connects shield ring 7 and screen layer 4, forms the three-dimensional mask chamber of cage modle three-dimensional arrangement; According to EGC sensor of the present utility model preferred embodiment, described hole 8 excessively is the plated through-hole of diameter 3mil; The outside surface entirety of described bottom wiring layer covers welding resistance insulation layer 9, form the high resistance electrical isolation between detecting electrode 6 and human body skin, its insulation resistance > 1G ohm, described detecting electrode 6 obtains electrocardiosignal by condenser coupling in a non contact fashion; Without any direct electrical connection between the detecting electrode 6 of noncontact formula EGC sensor of the present utility model and skin, neither need to rely on skin surface to smear gel as existing wet type electrode and ensure good conductive, also do not need to rely on user to wear underwear or T-shirt reaches " insulation " relatively as the noncontact formula EGC sensor that existing sensing chip is exposed.
Described electrocardiosignal amplification module 2 comprises prime amplifier 201 and two stage amplifier 202, and described detecting electrode 6 is connected to the in-phase input end of prime amplifier 201 by stopping condenser; Described three-dimensional mask chamber is connected to the reverse input terminus of prime amplifier 201 by 10K ohmic resistance, to eliminate external interference signal to the impact of detecting electrode 6; Described prime amplifier 201 is connected to two stage amplifier 202 by electrocardiosignal wave filter. In a typical embodiment of EGC sensor of the present utility model, described electrocardiosignal wave filter is connected and composed by 0.5Hz high pass, 100Hz low-pass filtering and 50Hz trap circuit. Considering that electrocardiosignal is low frequency signal, the preferred embodiment according to Fig. 1, EGC sensor of the present utility model adopts 3.5mm four-core audio frequency socket as four-core unitor 3, replaces the miniUSB interface that CN102657524B technical scheme is used for Electrode connection. Owing to the 3.5mm four-core audio frequency socket of the class cylindrical shape of centrosymmetry is non-directional, wire plug can from 360 degree of arbitrarily angled insertion sockets, than using convenient from the miniUSB interface of a fixing angle insertion socket. The output terminal of described electrocardiosignal amplification module 2, can reach 50cm audio signal wires via four-core connection 3 by length and be connected to electrocardio instrument main frame. In order to make user ensure best wearing comfort level under different attitude, the utility model provides three kinds of sampling system distribution schemes, chest scheme as shown in Figure 4 is applicable to motion, waist scheme as shown in Figure 5 is applicable to comfort level and requires higher slight activity, shoulder scheme as shown in Figure 6 is applicable to sleep, and user can choose at random according to hobby and configure.
Three-dimensional mask cavity configuration and multi-channel differential input mode is adopted due to EGC sensor of the present utility model, can effectively eliminate external interference, significantly improve signal to noise ratio, circle pcb board diameter is reduced to 2.8cm by EGC sensor of the present utility model, the diameter comparing CN102657524B technical scheme is the circular pcb board of 3.9cm, EGC sensor area reduction of the present utility model 48.5%. By greatly reducing the volume of noncontact formula EGC sensor and install area, wearable real time multi-channel noncontact formula electrocardio instrument of the present utility model can be laid in the chest space of comparable size and arrange more electrode, to improve the spatial resolution of electrocardiosignal sampling. As Figure 4-Figure 6, EGC sensor of the present utility model can easily be built in elasticity clothing matter fabric, and is distributed in the electrocardiosignal that classical position obtains similar Holter.
As shown in Figure 7, described electrocardio instrument main frame 20 comprises electrocardio sampling unit 21, signal processing unit 22 and wireless transmission unit 23 to an embodiment of wearable real time multi-channel noncontact formula electrocardio instrument of the present utility model; K-1 instrument amplifier 211 and eight channel modulus converters 212 that described electrocardio sampling unit 21 is connected by the multichannel Differential Input mode of each electrocardiosignal passage are formed; K-1 instrument amplifier 211 connects in multichannel Differential Input mode, and wherein, first EGC sensor H1, as shared difference negative pole, is connected in parallel with the inverting input of the instrument amplifier 211 of each road independence electrocardiosignal passage; Remaining each EGC sensor H2��Hk, as k-1 road independence electrocardiosignal passage difference positive pole, is connected respectively to the in-phase input end of the instrument amplifier 211 of each electrocardiosignal passage; From each road electrocardiosignal of EGC sensor Hs, through instrument with after amplifier 211 high power (magnification > 280 times) differential amplification, it is sent to the corresponding analog input passage of eight channel modulus converters 212 respectively, sample conversion is 16bit numerary signal, is sent to signal processing unit 22 as electrocardio sampling data.
Due to the input resistance extremely high (G ohm level) of noncontact formula electrode, neighbourhood noise is very responsive, very easily cause back end signal conditioning circuit saturated. The instrument amplifier 211 of the present embodiment is the INA333 instrument difference amplifier of company of Texas Instrument, INA333 has very high common-mode rejection ratio and extremely low input offset voltage, can common mode interference that effectively filtering is mixed in the electrocardiosignal of noncontact formula electrode, fundamentally improve the signal to noise ratio of input ecg signal, promotion signal quality.
The embodiment of the electrocardio instrument main frame 20 of the wearable real time multi-channel noncontact formula electrocardio instrument according to Fig. 8, described signal processing unit 22 comprises level one data buffer memory 221, heartbeat capture module 222, mass storage 223, secondary data buffer memory 224 and Web server 225; The electrocardio sampling data that sample conversion is obtained by described electrocardio sampling unit 21 are sent to level one data buffer memory 221, and are stored into mass storage 223 as raw data; Described heartbeat capture module 222 reads electrocardio sampling data from level one data buffer memory 221, calculates heartbeat quantitative estimation value and judges to catch electrocardiosignal according to heartbeat quantitative estimation value, ecg signal data is sent to secondary data buffer memory 224; Described Web server 225 reads ecg signal data from secondary data buffer memory 224, after being converted to HTML standard form, provides online electrocardiosignal display function by wireless transmission unit 23; Described Web server 225 reads ecg signal data from mass storage 223, is provided history heartbeat data playback and original electrocardiographicdigital sampling data unload function after being converted to HTML standard form by wireless transmission unit 23.
An embodiment of the electrocardio instrument main frame 20 according to wearable real time multi-channel noncontact formula electrocardio instrument of the present utility model, described mass storage 223 adopts high integration non-volatile memory chip, its available storage is at least 2GB, it is possible to meet the requirement that high precision high sampling rate hyperchannel electrocardiosignal uninterruptedly stores for a long time; For 16bit high precision electrocardiosignal, if sampling rate is every passage 1KHz, will realizing the sampling data that 24 hours uninterruptedly store 8 passages, storage capacity at least needs 16*1000/8*3600*24*8=1382400000byte �� 1.4GB; The technical solution of the utility model achieves electrocardio samples storage and does not rely on extraneous wireless signal covering; No matter whether user present position is covered by wireless signal, and electrocardiogram (ECG) data all can not be lost.
Described wireless transmission unit 23 comprises or bluetooth, ZigBee or WiFi ad Hoc wireless network, or 2G, 3G or 4G public network; Intelligent terminal 30 only need to access Web server 225 based on HTML agreement by wireless transmission unit 23, it is not necessary to installs any special software or plug-in unit just can realize the cross-platform display of ECG data; Described intelligent terminal 30 is the cross-platform terminating unit of configuration HTML standard web browser, comprise based on Windows, Linux, Unix, the Personal Computer of any operation system platform of iOS or Android, notebook computer, smart mobile phone, intelligent mobile terminal, or the monitoring terminal of tele-medicine first-aid centre; Described web browser comprises the IE supporting HTML standard, Chrome, Firefox, Safari browser, or the application app of sing on web service.
Configuration scheme implementation example according to Fig. 4-6, wearable real time multi-channel noncontact formula electrocardio instrument of the present utility model also comprises the warning unit 50 being connected to electrocardio instrument main frame 20, described warning unit 50 is configured in the middle top of elasticity dress material 40 front, comprises a mini microphone and an alarm button; In emergency circumstances (as feel nervous, uncomfortable in chest, uncomfortable etc.) wearer of electrocardio instrument by pinning alarm button (long press, as pinned more than 3 seconds) carry out the speech signal (such as " now I feels nervous uncomfortable in chest ") of typing oneself, send alarm is to the intelligent terminal 30 (handheld device such as mobile phone and so on) connected, described intelligent terminal 30 obtaining after alarm, by the timely Auto broadcast of public data communication network to client service center or medical first aid center; User or healthcare givers can according to the time of fire alarming moment of wearing person and voice information, from the magnanimity history electrocardiogram (ECG) data of this wearer, extract the electrocardiogram (ECG) data fragment of important time point rapidly and accurately and associate with the health impression of wearer, realize efficient data search, catch aroused in interest abnormal, the premature beat of sporadic and random generation or the electrocardiogram (ECG) data of arrhythmia; (as run, take a walk, have a meal under nonemergency, take medicine), wearer is by clicking or short in alarm button, and described warning unit 50 can also be used for event or the voice record of wearer's state, is later data analysis and medical diagnosis on disease image data.
Cardioelectric monitor method for above-mentioned wearable real time multi-channel noncontact formula electrocardio instrument of the present utility model comprises the following steps:
S10: obtain n history electrocardio sampling data x from the mass storage 223 of electrocardio instrument main frame 20i, wherein, i=1 ... n, xi=[xi,1xi,2...xi,m] it is i-th sample vector, m is sample vector xiMaximal dimension, n is that sample total amount and n are much larger than m;
S20: when the exploitation of product initial stage and interim renewal, utilizes original electrocardiographicdigital sampling data xiDevelopment environment sets up sample matrix and performs machine learning program, obtain obtaining the object vector �� of minimum error values by limited iteration, it is stored in the storer of electrocardio instrument main frame 20 as constant parameter, for the weight vector that any individual any time heartbeat catches; The computing amount of this step is big, length consuming time, only performs in the computing platform of development environment during the exploitation of product initial stage and interim renewal.
S30: electrocardio instrument main frame 20 obtains sampling data x in real time by electrocardio samplingi, utilize the object vector �� prestored to calculate heartbeat quantitative estimation valueTo sampling data x in real timeiCarry out heartbeat estimation, it is achieved heartbeat catches fast, and wherein, T is matrix matrix transpose operation. Due to f (xi��) mainly comprise linear computing, calculated amount is very little, so the speed that the heartbeat of this step catches algorithm is very fast, take CPU very little, use the electrocardio instrument main frame 20 of low-power-consumption embedded CPU to have sufficient ability to complete a heartbeat every 50-100 millisecond to estimate, it is possible to when keeping original signal waveform completely, it may also be useful to simple and quick linear computing catches electrocardiosignal.
The embodiment of the heartbeat method for catching of the present utility model according to Fig. 9, described step S20 performs machine learning program according to following step:
S200: generate one vectorial with the random value of dimension with object vector ��, as the initial value of ��; According to a preferred embodiment, the numerical value of each dimension of this random value vector, based on a random value vector between 0 and 1 (with �� with dimension), is then multiplied by 0.2 and subtracts 0.1 again and generate by the initial value of this object vector ��.
S210: set up sample matrix (x in development environmenti,yi) i=1 ... n, wherein yiFor history electrocardio sampling data xiThe no judgment value for heartbeat, namely
S220: based on sample matrix (xi,yi) set up error function J (��):
Wherein,J is the dimension degree of object vector ��, constant �� for controlling iterative increment size, �� �� 1;
S230: based on sample matrix (xi,yi) set up gradient function dJ/d ��:
Work as j=0,
When j >=1;
Because object vector �� is that (total dimension degree is m to multidimensional, m > 1), so the gradient function of its correspondence is also multidimensional, namely each dimension (such as jth dimension) of gradient function is that rank of error function J (��) the based target corresponding dimension degree of vector are led partially. Meanwhile, in iterative computation process, artificial to sample vector xiAdd the dimension degree that a constant is 1, it is labeled as x0, in object vector ��, increase a corresponding x accordingly0Dimension degree b0, in returning at General Linear to the estimation of intercept. It is emphasized that b0Only use in the iterative computation for object vector ��. When calculating terminates, after finding the optimum target vector based on all samples, b0Will be removed.
S240: using error function J (��) and gradient function dJ/d �� as input, call GNCfminunc function, carries out interative computation and upgrades object vector ��:
S250: find local extreme value by the iterative algorithm of finite number of time, finally obtains obtaining the object vector ��=[b of minimum error values1b2...bm], send electrocardio instrument main frame 20 to as constant parameter and it is stored in its storer.
The embodiment of the heartbeat method for catching of the present utility model according to Figure 10, described step S30 carries out heartbeat estimation according to following step:
S300: the real-time sampling data x obtaining EGC sensor from level one data buffer memoryi, xiFor length is the array of hundreds of, wherein contain the multi-channel sampling data of length 50-100 millisecond;
S310: utilize the object vector �� prestored, calculates sampling data x in real timeiHeartbeat quantitative estimation valuey��iCalculation result between zero and one;
S320: judge heartbeat quantitative estimation value y 'iWhether it is greater than 0.5, if y 'i> 0.5, goes to step S330, otherwise goes to step S340;
S330: judge sampling data xiFor real heartbeat, heart time is sent into secondary data buffer memory, return step S300 and wait electrocardio sampling next time;
S340: judge not comprise effective heartbeat data in sampling data, return step S300 and wait electrocardio sampling next time.
In order to embody the practical novel point of core of the present utility model, above-mentioned heartbeat catches algorithm and only describes basic algorithm structure in detail. Although in above embodiment, object vector �� is 1 �� m array, and heartbeat method for catching of the present utility model is equally applicable to more complicated mathematical model, such as, for multilayer neural network, at calculating f (xi, ��) and in process, it is necessary to adding the matrix describing hidden layer, it may be multiple for therefore relating to object vector, namely from xiStarting to need to carry out successively repeatedly computing, each layer performs a matrix multiplication operation, finally obtains one based on sample xi, value heartbeat estimated result f (x between zero and onei, ��). Concrete calculation step mathematical model is different and variant, but the basic structure that heartbeat catches algorithm is the same with thinking.
Those of ordinary skill in the art will be appreciated that; above embodiment is only used to the technical solution of the utility model is described; and not it is used as restriction of the present utility model; any the above embodiment is done based on connotation of the present utility model change, modification, all by the protection domain dropping on claim of the present utility model.
Claims (6)
1. a noncontact formula EGC sensor, for wearable real time multi-channel noncontact formula electrocardio instrument, it is characterized in that: described EGC sensor is made up of one piece of circular pcb board in independent 4 layer, it is included in the measuring element that 4 layers of circular pcb board inside are formed, and it is mounted on electrocardiosignal amplification module and the four-core unitor of 4 layers of circular pcb board layer top layer wiring layer, described electrocardiosignal amplification module is connected to described measuring element, the output terminal of described electrocardiosignal amplification module, is coupled through signal conductor via four-core and is connected to electrocardio instrument main frame; The second layer of described 4 layers of circular pcb board all applies copper and forms screen layer; Described 4 layers of circular pcb board third layer are interior wiring layer, and power supply and signal for EGC sensor inside connect;
Described measuring element adopts multi-layer PCB technique to be formed, and is made up of the three-dimensional mask chamber of detecting electrode and encirclement detecting electrode: the bottom wiring layer of described 4 layers of circular pcb board is divided into the detecting electrode being positioned at pcb board center and the shield ring around detecting electrode; Some the cross holes uniform along shield ring connect shield ring and screen layer, form the three-dimensional mask chamber of cage modle three-dimensional arrangement; The outside surface entirety of described bottom wiring layer covers welding resistance insulation layer, forms the high resistance electrical isolation between detecting electrode and human body skin, and described detecting electrode obtains electrocardiosignal by condenser coupling in a non contact fashion;
Described detecting electrode is connected to the in-phase input end of electrocardiosignal amplification module by stopping condenser; Described three-dimensional mask chamber is connected to the reverse input terminus of electrocardiosignal amplification module by resistance, to eliminate external interference signal to the impact of detecting electrode.
2. noncontact formula EGC sensor according to claim 1, it is characterized in that the diameter of described 4 layers of circular pcb board is 2.8cm, described detecting electrode is the annular Fu Tong district of diameter 2.5cm, described shield ring is the annular Fu Tong district of width 1.4mm, leaves the clearance for insulation of 0.1mm between described detecting electrode and shield ring.
3. noncontact formula EGC sensor according to claim 1, it is characterized in that described four-core unitor is 3.5mm four-core audio frequency socket, the output terminal of described electrocardiosignal amplification module can reach 50cm audio signal wires by length and be connected to electrocardio instrument main frame.
4. one kind uses the wearable hyperchannel electrocardio sampling underwear of the noncontact formula EGC sensor described in claim 1,2 or 3, comprise at least 3 EGC sensors being placed in and being connected to electrocardio instrument main frame, it is characterised in that: described EGC sensor is connected to the electrocardio sampling unit of electrocardio instrument main frame by four-core unitor; Described electrocardio sampling unit is connected and composed by instrument amplifier and eight channel modulus converters of each electrocardiosignal passage; The instrument of each electrocardiosignal passage amplifier connects in multichannel Differential Input mode, by the hyperchannel electrocardiosignal that EGC sensor obtains, send the signal processing unit of electrocardio instrument main frame to, wherein, first EGC sensor, as shared difference negative pole, is connected in parallel with the inverting input of the instrument amplifier of each road independence electrocardiosignal passage; All the other each EGC sensors, as each road independence electrocardiosignal passage difference positive pole, are connected respectively to the in-phase input end of the instrument amplifier of each electrocardiosignal passage; From each road electrocardiosignal of EGC sensor, through instrument with, after amplifier high power differential amplification, being sent to the corresponding analog input passage of eight channel modulus converters respectively, electrocardio sampled signal is converted to numerary signal.
5. wearable hyperchannel electrocardio according to claim 4 sampling underwear, characterized by further comprising the warning unit on the middle top being configured in elasticity dress material front, described warning unit comprises the mini microphone and alarm button that are connected to electrocardio instrument main frame, carry out the speech signal of typing oneself by pinning alarm button in emergency circumstances wearer, and send alert message to the intelligent terminal connected by electrocardio instrument main frame, or pass through public data communication network by alarm message Auto broadcast to client service center or medical first aid center.
6. wearable hyperchannel electrocardio according to claim 4 sampling underwear, it is characterised in that described electrocardio sampling underwear configures the EGC sensor described in 6; Described electrocardio sampling unit comprises 6 instrument amplifiers connected in multichannel Differential Input mode; Described EGC sensor configures according to the ECG electrode position of routine, to obtain the hyperchannel electrocardiosignal of the medical electrocardio instrument of similar specialty.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110799096A (en) * | 2017-06-20 | 2020-02-14 | 通用电气公司 | Non-contact heart rate monitoring |
| CN111265239A (en) * | 2020-02-21 | 2020-06-12 | 孙磊 | Fetal heart detection signal processing and information extraction system and method based on proximity calculation |
| CN113974636A (en) * | 2021-11-18 | 2022-01-28 | 武汉大学 | Auxiliary inspection method for wearing of 12-lead electrocardioelectrode plate based on image target detection |
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2015
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110799096A (en) * | 2017-06-20 | 2020-02-14 | 通用电气公司 | Non-contact heart rate monitoring |
| CN110799096B (en) * | 2017-06-20 | 2022-08-02 | 通用电气公司 | Non-contact heart rate monitoring |
| CN111265239A (en) * | 2020-02-21 | 2020-06-12 | 孙磊 | Fetal heart detection signal processing and information extraction system and method based on proximity calculation |
| CN113974636A (en) * | 2021-11-18 | 2022-01-28 | 武汉大学 | Auxiliary inspection method for wearing of 12-lead electrocardioelectrode plate based on image target detection |
| CN113974636B (en) * | 2021-11-18 | 2023-07-18 | 武汉大学 | Image target detection-based 12-lead electrocardio electrode plate wearing auxiliary inspection method |
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