CN203369903U - Small premature beat detection device - Google Patents
Small premature beat detection device Download PDFInfo
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- CN203369903U CN203369903U CN201320457301.8U CN201320457301U CN203369903U CN 203369903 U CN203369903 U CN 203369903U CN 201320457301 U CN201320457301 U CN 201320457301U CN 203369903 U CN203369903 U CN 203369903U
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Abstract
The utility model relates to a small premature beat detection device. The small premature beat detection device comprises an active electrocardio-electrode and a processing device which can be in communication with the active electrocardio-electrode, wherein the active electrocardio-electrode is attached to the position, near the heart, of the human body, collects, adjusts and switches electrocardio-signals and sends the electrocardio-signals into the processing device through an interface circuit to be detected and processed, and the processing device sends out state signals. The small premature beat detection device is low in power consumption, high in reliability and small in size, electrocardio data acquisition, electrocardio data processing, electrocardio data automatic detection and electrocardio data storage can be completed, and real-time monitoring for premature beats can be achieved, and the small premature beat detection device can be used for rapidly and accurately detecting the premature beats.
Description
Technical field
This utility model relates to a kind of medical apparatus and instruments, particularly a kind of microminiature premature beat checkout gear.
Background technology
Send exciting caused heartbeat by ectopic pacemaker, when its time of occurrence, than the basic rhythm of the heart (majority is sinus rhythm), do sth. in advance the person, be called premature beat or premature beat, be called for short premature beat.Premature beat is very important clinically a kind of arrhythmia.
Premature beat is the most common in ectopic cardiac rhythm, and its incidence rate accounts for 3.6～5% in general census of the population, in the asymptomatic youngster of participating in air force's health check-up, also accounts for 1.5～2.4%, accounts for 2.3～27.2% and do not wait in general hospital patient.BleiterShi with ambulatory electrocardiogram to 1108 people (wherein 98% for walking about or the outpatient of work and life as usual), make 10 hours Continuous Observations and find that only 11% rhythm of the heart is fully normal, 60% ventricular arrhythmia (wherein great majority are ventricular premature contraction) occurs, and 18% supraventricular arrhythmia (great majority are supraventricular premature beat) occurs.Someone estimates, almost premature beat was all once occurring in life for everyone.In various arrhythmia, the relative incidence rate of premature beat accounts for 12.3～27.2%, is only second to sinus arrhythmia (accounting for 43.6～69.4%) and occupies second.Premature beat is found in from fetus until the old man at advanced age, and more rare below 10 years old.The incidence rate of premature beat increased with the age.
Premature beat can be asymptomatic, also can cause the sensation of cardiopalmus discomfort, and a few peoples' symptom is comparatively obvious, so that increase the nervous and worried of patient.Most premature beat only occurs once in a while, but some premature beat occurs or lasting for years repeatedly, affects patient's live and work.Pathologic premature beat comprises in the medicines such as Folium Digitalis Purpureae, quinidine, antimony agent or electrolyte disturbance due to the abnormal caused body fluid premature beat of this material concentration in body fluid and the caused organic premature beat of organic heart disease.Premature beat may be premature beat tachycardia, ventricular flutter and vibration tendency (being called aura premature beat) but and threat to life, prognosis is active treatment in time seriously.
Although developed all kinds of premature beat checkout gears, as existing monitor also automatically detects and warning function with premature beat, in actual applications, because equipment is larger, carry inconvenience, so miniaturization, low-power consumption are the developing direction of premature beat checkout gear.
The utility model content
Be for the present premature beat checkout gear problem of Portable belt not for the problems referred to above this utility model, proposed a kind of small-sized premature beat checkout gear, volume is small and exquisite, is convenient for carrying.
To achieve these goals, this utility model can be used following technical side:
This utility model provides a kind of small-sized premature beat checkout gear, by active electrocardioelectrode and blood processor two parts, formed, active electrocardioelectrode is attached near human heart, blood processor can be communicated by letter with active electrocardioelectrode, it is characterized in that: active electrocardioelectrode is comprised of EGC sensor, amplifier, wave filter, analog-to-digital conversion module, transmission interface circuit and the first power supply circuits, and blood processor is by the receiving interface circuit, form with reference to electrocardio module, premature beat detection module, display module, memory module, sound alarm circuit, optical alarm circuit and the second power supply circuits, wherein, EGC sensor is measured the electrocardiosignal that gathers the patient, from the outfan of EGC sensor sends to amplifier electrocardiosignal is amplified, the outfan of amplifier connects the input of wave filter, device filtering direct current after filtering, High-frequency Interference and power frequency component, the outfan of wave filter connects analog-to-digital conversion module, then after converting digital signal to via analog-to-digital conversion module, send to the transmission interface circuit, output to blood processor through the transmission interface circuit again, the first power supply circuits are given each circuit supply of active electrocardioelectrode, the signal of the active electrocardioelectrode output that the receiving interface circuit receives from the transmission interface circuit and all send the premature beat detection module with reference to the signal of electrocardio module, premature beat detection module and display module, memory module harmony is connected with optical alarm circuit, the input of premature beat detection module is connected with the receiving interface circuit with reference electrocardio module simultaneously, outfan while and the display module of premature beat detection module, memory module, the input of sound alarm circuit and optical alarm circuit is connected, reference input with reference to the electrocardio module with reference to cardiechema signals access premature beat detection module compares, and will after the comparison process signal, by data, send respectively display module, memory module, sound alarm circuit and optical alarm circuit, the second power supply circuits and premature beat detection module, with reference to the electrocardio module, display module, memory module, sound alarm circuit and optical alarm circuit connect, give each circuit supply of blood processor, the premature beat detection module is calculated and filter function by chip microcontroller, by the interference component elimination in digital electrocardiosignal, and employing probability density function method, according to the probability density function curve shape of distance between two points after the electrocardiosignal phase space reconfiguration and extract characteristic parameter, utilize the comparison of characteristic parameter to detect premature beat, memory module has eliminated for storing the digital electrocardiosignal of disturbing.
The small-sized premature beat checkout gear that this utility model is related, wave filter is comprised of band filter and notch filter, before and after two wave filter, connect, the sequencing connected is not limit, band filter adopts unlimited gain multiple feedback type filter circuit except direct current and high frequency, and the notch filter circuit is selected the active filter filtering power frequency component with twin-T network.
Further, the filter function of premature beat detection module is the reference cardiechema signals accessed according to reference electrocardio module and utilizes the MLMS algorithm to carry out the composition disturbed in filtering numeral electrocardiosignal.
Further, the transmission interface circuit adopts shielded cable to be connected with the receiving interface circuit.
The effect of utility model and effect
Small-sized premature beat checkout gear provided by the utility model, function is strong, low in energy consumption, reliability is high, the whole system volume is small and exquisite, realized portable requirement, can complete electrocardiogram acquisition, processing, detection and data storage automatically, can also realize the real-time monitoring of premature beat, be conducive to the premature beat detection and enter into family.
The accompanying drawing explanation
Fig. 1 is the small-sized premature beat structure of the detecting device of this utility model schematic block diagram.
Fig. 2 is amplifier circuit figure in the small-sized premature beat checkout gear of this utility model.
Fig. 3 is band pass filter circuit figure in the small-sized premature beat checkout gear of this utility model.
Fig. 4 is notch filter circuit figure in the small-sized premature beat checkout gear of this utility model.
Fig. 5 is the chip schematic diagram of premature beat detection module in the small-sized premature beat checkout gear of this utility model.
Fig. 6 is acoustic alarm module circuit diagram in the small-sized premature beat checkout gear of this utility model.
Fig. 7 is light alarm module circuit diagram in the small-sized premature beat checkout gear of this utility model.
The specific embodiment
Below in conjunction with accompanying drawing, the preferred embodiment of the small-sized premature beat checkout gear related to this utility model elaborates, but this utility model is not limited in this embodiment.In order to make the public have thoroughly and understand this utility model, in following preferred embodiment of the present utility model, describe detail in detail.Fig. 1 is the small-sized premature beat structure of the detecting device of this utility model schematic block diagram.
As shown in Figure 1, small-sized premature beat checkout gear 100 comprises active electrocardioelectrode 101, the blood processor 102 that can communicate by letter with active electrocardioelectrode, active electrocardioelectrode 101 is attached near human heart, EGC sensor 1011 is measured the electrocardiosignal that gathers the patient, after sending 1012 pairs of electrocardiosignaies of amplifier to be amplified, device 1013 is by direct current, High-frequency Interference and power frequency component elimination after filtering, then after converting digital signal to via analog-to-digital conversion module 1014, send in blood processor 102 and carry out Check processing by interface circuit 1015, send status signal.
Active electrocardioelectrode can be attached to human body surface, usually can be worn on patient's chest or back, and it comprises EGC sensor 1011, amplifier 1012, wave filter 1013, analog-to-digital conversion module 1014, transmission interface circuit 1015 and the first power supply circuits 1016.EGC sensor 1011 is for measuring the electrocardiosignal that gathers the patient, because electrocardio is the faint signal of telecommunication, so the electrocardiosignal that must collect EGC sensor is amplified.
Analog-to-digital conversion module 1014 is connected to the outfan of wave filter 1013, for filtered signal being carried out to analog digital conversion to obtain the digitized electrocardiosignal.This analog-to-digital conversion module can adopt the super low-power consumption MSP430-1471 of TI company to realize, this chip has 12 A/D, can directly realize the digitized processing of electrocardiosignal.
Blood processor comprises receiving interface circuit 1021, with reference to electrocardio module 1023, premature beat detection module 1022, display module 1024, memory module 1025, acoustic alarm module 1028, light alarm module 1027 and the second power supply circuits.The digital electrocardiosignal that receiving interface circuit 1021 sends for receiving transmission interface circuit 1015, this transmission interface circuit 1015 adopts shielded cable to be connected with receiving interface circuit 1021.Eliminate electrocardio and disturb required reference signal for providing with reference to electrocardio module 1023.The input of premature beat detection module 1022 is connected with receiving interface circuit 1021 with reference electrocardio module 1023 simultaneously, it is for the interference component of the digital electrocardiosignal of eliminating access, the digital electrocardiosignal that it receives the receiving interface circuit according to adaptive algorithm and the reference cardiechema signals accessed with reference to electrocardio module 1023 give comparison and Filtering Processing, to eliminate the interference component in digital electrocardiosignal.
Fig. 2 is amplifier circuit figure in the small-sized premature beat checkout gear of this utility model.
As shown in Figure 2, amplifier 1012 amplifier OP2177 are for to hold floatingly, and another amplifier OP2177 is driven-right-leg circuit, and AD8221/0 is difference amplifier.Amplifying circuit 1012 is connected to the outfan of EGC sensor 1011, carries out the difference sampling for the electrocardiosignal that EGC sensor 1011 is collected, in the present embodiment, sample rate is 250, sampling resolution is 12Bits, and bandwidth is 25-100Hz, and elementary amplification is 20 times.
Fig. 3 is band pass filter circuit figure in the small-sized premature beat checkout gear of this utility model.
As shown in Figure 3, filter circuit 1013 is connected to the outfan of amplifying circuit 1012, for filtering direct current, High-frequency Interference and power frequency component.This filter circuit 1013 comprises band filter 1013a and notch filter 1013b, and the sequencing that both connect is not limit, and that is to say can be first by band filter 1013a filtering direct current and high frequency, then by notch filter 1013b filtering power frequency; Also can be first by after notch filter 1013b filtering 50Hz power frequency, carrying out again bandpass filtering.As shown in Figure 3, band filter 1013a is connected with EGC sensor 1011 outfans and for filtering direct current and High-frequency Interference, and this band filter 1013a adopts unlimited gain multiple feedback type filter circuit.It is to have in theory unlimited gain operational amplifier by one to compose the filter circuit formed with multiple feedback, the basic structure of the unlimited gain multiple feedback second order bandwidth-limited circuit consisted of single operational amplifier.Unlimited gain multiple feedback type filter circuit is not owing to there is no positive feedback, therefore stability is high.Amplifier adopts the LM324 of TI company, a road of four high guaily unit.The relevant parameter of band filter is:
Passband gain is:
Mid frequency is:
Quality factor is:
Fig. 4 is notch filter circuit figure in the small-sized premature beat checkout gear of this utility model.
Wherein,
From double-T shaped wave trap was different in the past, this circuit is introduced amplifier U2 and is formed positive feedback, to reduce resistance band, makes near the amplitude on the both sides of stopband center frequency increase.The value of R1, R2, C1, C2 can be determined by mid frequency f0.
when f0=50Hz, C and R get respectively O.068 μ F and 47k Ω; During f0=100Hz, C and R get respectively O.068 μ F and 24k Ω.
The chip schematic diagram that Fig. 5 is premature beat detection module in the small-sized premature beat checkout gear of this utility model.
As shown in Figure 5, this premature beat detection module 1022 adopts the BlackfinBF533 chip of ADI company, this chip has powerful data processing function, can easily complete the complicated calculations such as self adaptation electrocardio noise cancelling alorithm, the digital electrocardiosignal that the receiving interface circuit receives is sent into the primary input end of BlackfinBF533 chip, and is sent into the reference input of BlackfinBF533 chip by the reference cardiechema signals of reference electrocardio module 1023 accesses.Because initial electrocardiosignal is gathered by chest surface skin, this initial electrocardiosignal is mixed with a lot of interference the such as electromyographic signal, and the frequency spectrum between electrocardiosignal and interference has a wide range of overlapping, uses common filtering method effectively it not to be eliminated.Therefore, the BLACKFINBF533 chip adopts MLMS algorithm filtering electrocardio interference component, and the electrocardiosignal even gathered is:
Wherein, b
jcollection value for signal center's electricity composition;
for the electrocardio composition transmitted by body wall;
random noise for the primary input end.And the electrocardiosignal of reference input access gathers from apex of the heart position, for:
x
j=h
j+n
j （2）
Wherein, h
jfor electrocardio reference signal collection value; n
jfor the noise in reference signal.
If n
j,
and b
jfor incoherent mutually, and they and h
j,
also uncorrelated, the fundamental equation that can obtain thus self-adapted noise elimination sound device is:
e
j=d
j-y
j （3）
Determine y
jequation by the adaptive algorithm adopted, determined.Adopt the MLMS algorithm, its recurrence equation is:
e
j=d
j-W
j-1 TX
j （4）
G
j=2μ/[1+2μX
j TX
j] （5）
W
j=W
j-1+G
je
jX
j （6）
W in formula
jfor j self adaptation weight vector constantly.If it is p rank vectors, establish
W
j=[W
j0,W
j1,......,W
j,p-1]
T
And X
jfor the input signal vector of sef-adapting filter, for: X
j=[X
j, X
j-1..., X
j-(p-1)]
t.
In premature beat detection module 1022, the electrocardiosignal filtering disturb after, adopt the probability density function method, according to the probability density function curve shape of distance between two points after the electrocardiosignal phase space reconfiguration and extract characteristic parameter k
n, utilize characteristic parameter k
ncan accurately detect premature beat.
Fig. 6 is acoustic alarm module circuit diagram in the small-sized premature beat checkout gear of this utility model.
As shown in Figure 6, in small-sized premature beat checkout gear 100, premature beat detection module 1022 is connected with acoustic alarm module 1026, and the emitter stage that is connected an audion by a buzzer or loudspeaker is realized warning function.
Fig. 7 is light alarm module circuit diagram in the small-sized premature beat checkout gear of this utility model.
As shown in Figure 7, in small-sized premature beat checkout gear 100, premature beat detection module 1022 is connected with light alarm module 1027, by the Light-Emitting Diode of an Opposite direction connection, realizes warning function.
In addition, blood processor also be provided with for the monitoring button of the electrocardio for user operation and with this electrocardio monitoring button, is connected and according to push button signalling by filtering the electrocardiosignal of interference component or the handover module that the electrocardiosignal that accessed by the receiving interface circuit offers display module etc.
To sum up, this utility model microminiature premature beat checkout gear adopts the processing of circuit electrocardiogram (ECG) data of low-power consumption miniaturization, its circuit function is strong, low in energy consumption, reliability is high, and adopt the probability density function method, according to the probability density function curve shape of distance between two points after the electrocardiosignal phase space reconfiguration and extract characteristic parameter k
n, utilize characteristic parameter k
ncan accurately detect premature beat.The whole system volume is very small and exquisite, has realized portable requirement, can complete automatic detection, the data storage of electrocardiogram acquisition, processing, premature beat, and the real-time monitoring and the warning that realize premature beat.
Claims (4)
1. a small-sized premature beat checkout gear, be comprised of active electrocardioelectrode and blood processor two parts, and active electrocardioelectrode is attached near human heart, and blood processor can be communicated by letter with active electrocardioelectrode, it is characterized in that:
Described active electrocardioelectrode is comprised of EGC sensor, amplifier, wave filter, analog-to-digital conversion module, transmission interface circuit and the first power supply circuits; And
Described blood processor is by the receiving interface circuit, form with reference to electrocardio module, premature beat detection module, display module, memory module, sound alarm circuit, optical alarm circuit and the second power supply circuits;
Wherein, EGC sensor measure to gather patient's electrocardiosignal, and from the outfan of EGC sensor sends to amplifier described electrocardiosignal is amplified, the outfan of amplifier connects the input of wave filter, through described wave filter filtering direct current, High-frequency Interference and power frequency component
The outfan of described wave filter connects analog-to-digital conversion module, then after converting digital signal to via analog-to-digital conversion module, send to described transmission interface circuit, output to blood processor through the transmission interface circuit again, the first power supply circuits are given each circuit supply of active electrocardioelectrode
The signal of the active electrocardioelectrode output that the receiving interface circuit receives from the transmission interface circuit and all send the premature beat detection module with reference to the signal of electrocardio module, the premature beat detection module is connected with optical alarm circuit with display module, memory module harmony, the input of described premature beat detection module is connected with the receiving interface circuit with reference electrocardio module simultaneously, the outfan of premature beat detection module is connected with the input of display module, memory module, sound alarm circuit and optical alarm circuit simultaneously
The described reference input of described premature beat detection module that accesses with reference to cardiechema signals with reference to the electrocardio module, and will send respectively display module, memory module, sound alarm circuit and optical alarm circuit by data after processing signals after filtering, the second power supply circuits are with the premature beat detection module, be connected with reference to electrocardio module, display module, memory module, sound alarm circuit and optical alarm circuit, give each circuit supply of blood processor
Described premature beat detection module is calculated and filter function by chip microcontroller, by the interference component elimination in digital electrocardiosignal, and employing probability density function method, according to the probability density function curve shape of distance between two points after the electrocardiosignal phase space reconfiguration and extract characteristic parameter, utilize the comparison of characteristic parameter to detect premature beat, described memory module has eliminated for storing the digital electrocardiosignal of disturbing.
2. small-sized premature beat checkout gear according to claim 1 is characterized in that:
Wherein, described wave filter is comprised of band filter and notch filter, before and after two wave filter, connect, the sequencing connected is not limit, band filter adopts unlimited gain multiple feedback type filter circuit except direct current and high frequency, and described notch filter circuit is selected the active filter filtering power frequency component with twin-T network.
3. small-sized premature beat checkout gear according to claim 1 is characterized in that:
Wherein, the filter function of described premature beat detection module is the reference cardiechema signals accessed according to reference electrocardio module and utilizes the MLMS algorithm to carry out the composition disturbed in filtering numeral electrocardiosignal.
4. small-sized premature beat checkout gear according to claim 1 is characterized in that:
Wherein, described transmission interface circuit adopts shielded cable to be connected with the receiving interface circuit.
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|---|---|---|---|
| CN201320457301.8U CN203369903U (en) | 2013-07-30 | 2013-07-30 | Small premature beat detection device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320457301.8U CN203369903U (en) | 2013-07-30 | 2013-07-30 | Small premature beat detection device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105024669A (en) * | 2015-08-14 | 2015-11-04 | 成都易思科科技有限公司 | Active low-pass filter circuit using 4580 operation amplifier |
-
2013
- 2013-07-30 CN CN201320457301.8U patent/CN203369903U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105024669A (en) * | 2015-08-14 | 2015-11-04 | 成都易思科科技有限公司 | Active low-pass filter circuit using 4580 operation amplifier |
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140101 Termination date: 20140730 |
|
| EXPY | Termination of patent right or utility model |