CN101406394B - LCD screen electro-cardio R-R interval left-aligning wave-by-wave display device - Google Patents
LCD screen electro-cardio R-R interval left-aligning wave-by-wave display device Download PDFInfo
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- CN101406394B CN101406394B CN2008101221148A CN200810122114A CN101406394B CN 101406394 B CN101406394 B CN 101406394B CN 2008101221148 A CN2008101221148 A CN 2008101221148A CN 200810122114 A CN200810122114 A CN 200810122114A CN 101406394 B CN101406394 B CN 101406394B
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Abstract
The invention discloses a liquid crystal screen electrocardio R-R interval left alignment wave continuous display method and a device. The method comprises the following steps: using an electrocardio record display system device controlled by a singlechip or a microcontroller to sample electrocardio data and intelligently identify R waves or abnormalities of an electrocardio wave group. On the basis of identifying the R waves, the method allows an electrocardiogram to be displayed into R-R interval electrocardio waveform curves with left aligned R waves by controlling that each frame display starts from the uniform position of one point prior to each R wave, and ensures that an R-R interval electrocardio wave group curve is sufficiently displayed on a display area of a small liquid crystal screen, and a waveform is detailed and comparable and the arrhythmia problem is intuitive; and a normal electrocardio waveform displays quickly, and pauses when encountering a problem, and an abnormal electrocardiowave form is identified by people. Due to the particularity of the display method, a circuit for preventing an electrocardio base line from moving up and down and deviating is arranged in the device. The method is particularly applied to small liquid crystal display screens for household mini-electrocardio monitors.
Description
Technical field
The present invention relates to Medical Instruments electrocardiogram display packing, especially relate to a kind of liquid crystal display screen electrocardio R-R interval left-justify by ripple display packing and device.
Background technology
Electrocardiographic application has twenty or thirty year history, the particularly computer technology develop rapidly over past ten years, the system that constitutes the electrocardiographic recording demonstration with single-chip microcomputer (being microcontroller again), the non-volatile internal memory of high power capacity FLASH, LCD LCDs, charging lithium ion battery and the integrated instrument amplifier IC of high-performance is very ripe, typical.But their shown electrocardiograms still are a lot of continuous electrocardio ripple curve on the similar electrocardiogram paper, as seeing on be everlasting hospital ward or TV.This simple displaying mode is just very impracticable on the pocket electrocardioscanner of domestic class, the LCD screen is too little or resolution is not enough, cause very little, the crucial ecg wave form feature of electrocardio ripple curve to lack inadequately because of resolution, particularly Chang Yong arrhythmia problem is difficult to intuitively find out.
Summary of the invention
The object of the present invention is to provide a kind of liquid crystal display screen dynamically to show electrocardiogram methods and device thereof by ripple, a frame frame ecg wave form curve that makes demonstration just in time is left-Aligned one by one electrocardio R-R interval.Limited LCDs dot matrix fully is used for only showing the R-R interval electrocardio wave group of an amplification; With the electrocardiographic recording display device of single-chip microcomputer or the microprocessor controls electrocardio situation that can note abnormalities easily, and keep display halt to allow the people see clearly, to remember.
The technical solution adopted for the present invention to solve the technical problems is:
1. the ripple display packing is pursued in liquid crystal display screen electrocardio R-R interval left-justify:
With the electrocardiographic recording display device of single-chip microcomputer or the microprocessor controls electrocardiogram (ECG) data of sampling, discern R ripple or abnormal conditions in the electrocardio wave group intelligently; The step of this method is as follows:
1) LCDs is shown the ecg wave form curve with a frame one frame ground, every frame only shows 1.2 seconds ecg wave form curve in detail, on the basis of identification R ripple, by controlling the unified position of every frame demonstration from the R ripple, 2 R ripples just in time appear normal range, i.e. R-R interval wave group, the left side R ripple of next frame is exactly the right R ripple of previous frame, be to see complete left side R ripple clearly in the practicality, the R ripple on the left side is fixed on the 5mm place on display screen limit, the position of the right R ripple is with changing before and after the heartbeat speed: when heartbeat was fast, the right R ripple was taken back; When heartbeat was slow, the right R ripple took over, and simultaneously instant heart rate numerical value also shows on the upper left side;
2) to the normal ecg wave form of heartbeat in 60～100 times/minute scopes, a very fast frame one frame ground shows and skips, when any improper ecg wave form or heartbeat heart rate occurring and exceed normal range, show on the screen and keep suspending, allow the people see improper ecg wave form attitude clearly, if it is that instrument can identify for which kind of electrocardiogram problem, then directly below show with literal, the ecg wave form situation near the scope is a bit looked in continue to see the back by button decision then or search forward, and improper electrocardio ripple is adopted simply frame by frame display mode continuously.
Because whole screen only shows the ecg wave form curve of 1.2 seconds R-R interval wave groups, to the electrocardiosignal baseline fluctuate up and down depart from extremely responsive, the physical activity amplitude big a bit or when antiperspirant being arranged on one's body summer the electrode degree of tightness change and will cause waveform to deflect away from outside the display screen up or down, baseline stability circuit or equivalent software control algorithm must be arranged, disclosed herein is a kind of efficiently and simply practical circuit, principle is that output with ecg amplifier is through resistance, feed back to the reverse input end of ecg amplifier behind the capacitor filtering, and resistance is subjected to single-chip microcomputer or microprocessor controls: numerical value was little when needle position misalignment was serious; Baseline becomes the resistance increasing of steady back gradually to reduce the electrocardio sampled data distortion that the baseline stability circuit causes.
More than 1), 2) the described display mode of step is commonly used in the replayed section of electrocardiographic recording, if heart real time monitoring also will be with above 1), 2) the described display mode of step, pause when then encountering problems can not be oversize, and use audible alarm, heart real time data during pause still are recorded in the internal memory automatically, in order to subsequent playback.
2. the ripple display device is pursued in liquid crystal display screen electrocardio R-R interval left-justify:
Comprise instrument amplifier IC, active low-pass filter and 50Hz trap anti-jamming circuit, A/D conversion, single-chip microcomputer or microcontroller, high capacity memory and LCDs; Instrument amplifier IC output links to each other with active low-pass filter and 50Hz trap anti-jamming circuit input, active low-pass filter and the output of 50Hz trap anti-jamming circuit link to each other with A/D conversion input, A/D conversion output is connected with single-chip microcomputer or microcontroller, and single-chip microcomputer or microcontroller are connected with LCDs with the high capacity memory respectively by bus.Instrument amplifier IC has increased the baseline stability negative-feedback circuit, concrete connection is: the outfan of instrument amplifier IC is told one tunnel low-pass filter circuit through first resistance R 1, the second resistance .R2 and capacitor C 1 formation, and its output is connected to the inverting input of instrument amplifier IC through the 3rd resistance R 3, first resistance R 1 is digital regulation resistance or the cmos analog switch that is subjected to single-chip microcomputer or microprocessor controls.
The beneficial effect that the present invention has is:
1) the every frame of liquid crystal display screen shows a R-R interval electrocardio wave group figure as wide as possible, and the form details can be seen clearly;
2) utilizing LCDs rightly is that dynamic display spare comes a dynamic frame frame ground to show one by one R-R interval electrocardio wave group curve, and each frame has unified left-Aligned demonstration starting point, makes the comparability of the electrocardio ripple that shows frame by frame on having had intuitively.If rock behind the R wavefront of the right and illustrate obviously that greatly then arrhythmia is serious; Accidental one or two improper ripple can make the people pinpoint the problems very soon in eclipsed ordinary wave almost.
3) running into abnormal conditions can pause or report to the police, and allowing the people see that electrode gets loose clearly still is improper ecg wave form attitude, and very fast user has just been known problematic ecg wave form.
Therefore, this electrocardio explicit representation allows non-electrocardio doctor's ordinary people also can see to there emerged a general situation very intuitively, is specially adapted to the little LCDs on the pocket electrocardioscanner of domestic class.
Description of drawings
Fig. 1 is that electrocardio R-R interval left-justify is by ripple display packing sketch map.
Fig. 2 is the electrocardiographic recording display device principle of compositionality block diagram of typical single-chip microcomputer or microprocessor controls.
Fig. 3 is a baseline stability negative-feedback circuit schematic diagram.
The specific embodiment
The invention will be further described below in conjunction with drawings and Examples.
With the electrocardiographic recording display device of single-chip microcomputer or the microprocessor controls electrocardiogram (ECG) data of sampling, discern R ripple or abnormal conditions in the electrocardio wave group intelligently.The identification of R ripple has several different methods, wherein according to the obvious characteristic of R ripple: slope, amplitude all are maximum, and other each ripple in the wave group, therefore declare slope, amplitude maximum be exactly the R ripple be simple basic skills, and be easy to realize, comprise also that certainly R-R interval calculation, the improper heartbeat of detection all can realize by the electrocardiographic recording display device of single-chip microcomputer or microprocessor controls.
As shown in Figure 1, the step of this method is as follows:
1) LCDs is shown the ecg wave form curve with a frame one frame ground, every frame only shows 1.2 seconds ecg wave form curve in detail, on the basis of identification R ripple, by controlling every frame demonstration shifts to an earlier date any since a R ripple unified position (5mm), 2 R ripples just in time appear normal range, i.e. a R-R interval wave group.The left side R ripple of next frame is exactly the right R ripple of previous frame.For seeing complete left side R ripple clearly, the R ripple on the left side is fixed on the 5mm place on display screen limit, shown in (A) among Fig. 1, (B), (C) in the practicality.The position of the right R ripple is with changing before and after the heartbeat speed: when heartbeat was fast, the right R ripple was taken back; When heartbeat was slow, the right R ripple took over, and the comparability on the ecg wave form of Xian Shiing has just had intuitively so frame by frame illustrates obviously that greatly then arrhythmia is serious if rock behind the R wavefront of the right; Accidental one or two improper ripple also can allow the people see that the back is with deep impression in the almost eclipsed ordinary wave on the position.The instant heart rate numerical value of being calculated by single-chip microcomputer or microcontroller simultaneously also shows in the fixed position, upper left side;
2) to the normal ecg wave form of heartbeat in 60～100 times/minute scopes, a very fast frame one frame ground shows also to be skipped, shown in (A) among Fig. 1, (B), (C).When any improper ecg wave form or heartbeat heart rate occurring and exceed normal range, show the maintenance time-out screen on, allow the people see improper ecg wave form attitude clearly, shown in (D) among Fig. 1, (E), (F), (G).If which kind of electrocardiogram problem can identify be to device, then directly below show the literal that occurs as below among Fig. 1 (D), (E) with literal.The ecg wave form situation near the scope is a bit looked in continue to see the back by button decision then or search forward, and improper electrocardio ripple is adopted simply frame by frame display mode continuously.
The upper left numerical value of every screen is instant heart rate (inferior/minute); The bottom-right numerical value of every screen is respectively accumulative total to current improper and normal heartbeat number.
Because whole screen only shows the ecg wave form curve of 1.2 seconds R-R interval wave groups, to the electrocardiosignal baseline fluctuate up and down depart from extremely responsive, the physical activity amplitude big a bit or when antiperspirant being arranged on one's body summer the electrode degree of tightness change and will cause waveform to deflect away from outside the display screen up or down, special baseline stability circuit or equivalent software control algorithm must be arranged, disclosed herein is a kind of efficiently and simply practical circuit, principle is that output with ecg amplifier (being exactly instrument amplifier IC) is through resistance, feed back to the reverse input end of ecg amplifier behind the capacitor filtering again, and resistance is subjected to single-chip microcomputer or microprocessor controls: numerical value was little when needle position misalignment was serious; Baseline becomes the resistance increasing of steady back gradually to reduce the electrocardio sampled data distortion that the baseline stability circuit causes.
More than 1), 2) the described display mode of step is commonly used in the replayed section of electrocardiographic recording, if heart real time monitoring also will be with above 1), 2) the described display mode of step, pause when then encountering problems can not be oversize, and use audible alarm, heart real time data during pause still are recorded in the internal memory automatically, in order to subsequent playback.
Every frame only shows the numerical value commonly used that 1.2 seconds ecg curves are the little liquid crystal display screens of 132X65LCD, the higher display screen of laterally counting suitably is lengthened to more than 1.5 seconds also is fine, this moment, plural R-R interval wave group (promptly seeing the R ripple more than three) can appear in one frame.
As shown in Figure 2, a kind of liquid crystal display screen electrocardio R-R interval left-justify is by the ripple display device, many places just of the present invention are called the electrocardiographic recording display device of single-chip microcomputer or microprocessor controls, comprise instrument amplifier IC (being ecg amplifier in medical domain), active low-pass filter and 50Hz trap anti-jamming circuit, A/D conversion, single-chip microcomputer or microcontroller, high capacity memory and LCDs.Instrument amplifier IC output is gone into end with active low-pass filter and 50Hz trap anti-jamming circuit and is linked to each other, active low-pass filter and the output of 50Hz trap anti-jamming circuit link to each other with A/D conversion input, A/D conversion output is connected with single-chip microcomputer or microcontroller, and single-chip microcomputer or microcontroller are connected with LCDs with the high capacity memory respectively by bus.
As shown in Figure 3, instrument amplifier IC has increased baseline stability negative-feedback circuit (said special baseline stability circuit promptly), concrete connection is: the outfan of instrument amplifier IC is told one tunnel low-pass filter circuit through resistance R 1 .R2 and capacitor C 1 formation, and its output is connected to the inverting input of instrument amplifier IC through resistance R 3.And resistance R 1 is subjected to single-chip microcomputer or microprocessor controls: numerical value was little when needle position misalignment was serious; The steady back resistance R 1 that baseline becomes gradually strengthens to reduce the electrocardio sampled data distortion that the baseline stability circuit causes.R1 is digital regulation resistance or cmos analog switch in the practicality.
This scheme theoretically, when frequency was very low, the common mode rejection ratio of instrument amplifier can non-constant, had in fact destroyed the typical structure of instrument amplifier, so others does not go to use.But in fact the low frequency part of electrocardiosignal is exactly a baseline (gain does not require), only requires that it is stabilized in the middle and lower part of screen as soon as possible, and promptly gain is near 0 when frequency is very low, and this moment, the common mode inhibition ratio was inoperative already.When real work, R1 is dynamic: when heart electrode rigidly connects on one's body or during loose contact, incoming level changes suddenly, it is saturated or the bottom is saturated to cause showing that curve is biased to the top, this moment, R1 was with less resistance, make electrocardiogram be stabilized to the middle and lower part of screen as early as possible to produce strong negative feedback, waveform has bigger distortion to manage certainly; (notice that electrocardio input here is to use the electric capacity isolated DC) after electrocardiogram is stabilized to the screen middle and lower part gradually, the resistance of transferring big R1 automatically is to reduce the electrocardiogram distortion that this negative feedback causes.
The electrocardiographic recording display device of single-chip microcomputer that the present invention is directed to or microprocessor controls generally all is little power consumption system, with the power supply of charging lithium ion battery, isolates fully with the strongly disturbing electrical network of 50Hz power frequency is arranged.If will transmit data with the equipment OLRT of the power supply that gets access to grid, online such as computer, must use up the isolation digital communication.Under such condition, the anti-common mode disturbances of ecg amplifier requires significantly to reduce, and driven-right-leg circuit commonly used has not been wanted yet.
Above-described all method steps and schematic diagram obviously all are the most basic, and location and specification difference according to product in the practicality can have multiple equivalent deformation.In the protection domain of spirit of the present invention and claim, any modification and change to the present invention makes all fall into protection scope of the present invention.
Claims (1)
1. liquid crystal display screen electrocardio R-R interval left-justify comprises instrument amplifier IC, active low-pass filter and 50Hz trap anti-jamming circuit, A/D conversion, single-chip microcomputer or microcontroller, high capacity memory and LCDs by the ripple display device; Instrument amplifier IC output links to each other with active low-pass filter and 50Hz trap anti-jamming circuit input, active low-pass filter and the output of 50Hz trap anti-jamming circuit link to each other with A/D conversion input, A/D conversion output is connected with single-chip microcomputer or microcontroller, and single-chip microcomputer or microcontroller are connected with LCDs with the high capacity memory respectively by bus; It is characterized in that: instrument amplifier IC has increased the baseline stability negative-feedback circuit, concrete connection is: the outfan of instrument amplifier IC is told one tunnel low-pass filter circuit through first resistance R 1, second resistance R 2 and capacitor C 1 formation, and its output is connected to the inverting input of instrument amplifier IC through the 3rd resistance R 3, first resistance R 1 is digital regulation resistance or the cmos analog switch that is subjected to single-chip microcomputer or microprocessor controls; This display device is with single-chip microcomputer or the microprocessor controls electrocardiogram (ECG) data of sampling, R ripple or abnormal conditions in the identification electrocardio wave group of intelligence, and:
1) LCDs is shown the ecg wave form curve with a frame one frame ground, every frame only shows 1.2 seconds ecg wave form curve in detail, on the basis of identification R ripple, by controlling the unified position of every frame demonstration from the R ripple, 2 R ripples just in time appear normal range, i.e. R-R interval wave group, the left side R ripple of next frame is exactly the right R ripple of previous frame, be to see complete left side R ripple clearly in the practicality, the R ripple on the left side is fixed on the 5mm place on display screen limit, the position of the right R ripple is with changing before and after the heartbeat speed: when heartbeat was fast, the right R ripple was taken back; When heartbeat was slow, the right R ripple took over, and simultaneously instant heart rate numerical value also shows on the upper left side;
2) to the normal ecg wave form of heartbeat in 60～100 times/minute scopes, a very fast frame one frame ground shows and skips, when any improper ecg wave form or heartbeat heart rate occurring and exceed normal range, show on the screen and keep suspending, allow the people see improper ecg wave form attitude clearly, if it is that device can identify for which kind of electrocardiogram problem, then directly below show with literal, the ecg wave form situation near the scope is a bit looked in continue to see the back by button decision then or search forward, and improper electrocardio ripple is adopted simply frame by frame display mode continuously.
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| CN102599904A (en) * | 2012-03-08 | 2012-07-25 | 珠海迈德豪医用科技有限公司 | Electrocardiogram detection displaying method |
| CN103364715B (en) * | 2012-04-09 | 2016-04-13 | 孕龙科技股份有限公司 | Signal display method |
| CN104013390B (en) * | 2014-06-09 | 2016-08-24 | 宁波瑞诺医疗科技有限公司 | Pulse detection control method |
| CN108309280A (en) * | 2018-02-11 | 2018-07-24 | 许少辉 | The signal intensifier circuit of electrocardiograph |
| CN113040778B (en) * | 2019-12-26 | 2022-07-29 | 华为技术有限公司 | Diagnostic report generation method and device, terminal equipment and readable storage medium |
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| CN2036404U (en) * | 1988-06-04 | 1989-04-26 | 河北省电子技术研究所 | Dynamic intelligence electro-cardio-monitor |
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| CN2036404U (en) * | 1988-06-04 | 1989-04-26 | 河北省电子技术研究所 | Dynamic intelligence electro-cardio-monitor |
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