CN201127603Y

CN201127603Y - Hand-hold electrocardioscanner

Info

Publication number: CN201127603Y
Application number: CNU200720303352XU
Authority: CN
Inventors: 洪明; 张亚君; 潘卫江
Original assignee: Hangzhou Electronic Science and Technology University
Current assignee: Hangzhou Dianzi University; Hangzhou Electronic Science and Technology University
Priority date: 2007-12-27
Filing date: 2007-12-27
Publication date: 2008-10-08
Anticipated expiration: 2017-12-27

Abstract

The utility model relates to a portable ECG monitor. The prior ECG monitor is not suitable for family use due to inconvenient portability and comparatively high cost. The shell body of the portable ECG monitor is provided with a liquid crystal display screen, a switch button, a start button, a stop button, a data-uploading button and a USB port, and the side of the shell body is provided with a left-hand electrocardio-electrode and a right-hand electrocardio-electrode. A microprocessor together with a FLASH memory and a functional key circuit which are connected with the signal of the microprocessor are arranged inside the shell body. A difference amplifying circuit, a band-pass filter circuit, a cophase amplifying circuit and an A/D converting circuit are connected in series in sequence, wherein, the signal output end of the A/D converting circuit is connected with the microprocessor, and the difference amplifying circuit is respectively connected with the left-hand electrocardio-electrode and the right-hand electrocardio-electrode. With a hand contact electrode mode adopted to gather electrocardiosignals, the portable ECG monitor has convenient measuring mode and is suitable for family and long-term stable monitoring and detection.

Description

A kind of hand-held electrocardio detector

Technical field

This utility model belongs to medical electronics technique with the apparatus field, particularly a kind of portable, in real time show ecg wave form, have electrocardio analysis automatically, measuring ability and data storage function, and the electrocardioscanner of arrhythmia diagnostic function.

Background technology

Cardiovascular diseases's serious harm people's health, and great majority are all relevant with arrhythmia in the cardiovascular disease.In order to make diagnosis, just need utilize patient's electrocardiogram to arrhythmia.Its ultimate principle is: the current potential that heart is subjected to himself to produce stimulates, and the excitement that makes sinuatrial node produce turns to the myocardial cell of atrium and ventricle successively, and this faint bio electricity can come out in person surface measurement, i.e. electrocardiosignal.When we constitute the loop and just obtain electrocardiosignal after processing and amplifying at body surface with two or three electrodes.

Modal detection mode is utilized electrocardiograph exactly in the hospital, it can critically write down the ecg wave form in a period of time, but owing to cardiopathicly have a uncertainty, unusual waveforms might not occur when measuring with electrocardiograph, this mode has certain limitation.Also utilize dynamic monitor system to obtain ecg information, as holter.Patient long-time (about 24 hours) wears handset, and dynamic electrocardiogram information under the continuous record is brought back hospital and by host computer system electrocardiogram (ECG) data analyzed; Perhaps when the user does not feel like oneself, note electrocardiogram, again it is uploaded by PC or phone; Or directly take hospital and give the doctor as diagnosis basis.The shortcoming of this mode is: real-time is poor, and the handset part only can show, writes down or transmit, and does not have analytic function.Certainly electrocardiosignal can be analyzed, be detected to the main frame of monitor system, but because it is too expensive, common patient can't be born at all.

Have in the market that electrocardio detects, the product of analytic function mainly is the monitor system towards hospital, and at patient individual, only can write down, store electrocardio but not with the product of analytic function.And most patient is not understood the concrete connotation of various actual ecg wave forms, can only seek help from the doctor, thereby reduced the practical value of this monitoring series products to a great extent, this also is that the electrocardio product is failed as electric sphygmomanometer, opens a major reason of family market.

In addition, when using electrocardiograph or electrocardiogram monitor in the hospital, in order to guarantee to extract electrocardiosignal preferably, normally adopt on chest lead mode or extremity lead mode external special electrode (as the Ag-Agcl electrode) or diligently electrical terminal clamp wrist and ankle; Link through the line that leads then.But will greatly influence the activity of user in this practical application, and can feel both inconvenient, also be unfavorable for monitoring steady in a long-term, also increase the measurement cost simultaneously.

Summary of the invention

The purpose of this utility model is exactly at the deficiencies in the prior art, and a kind of hand-held electrocardio detector is provided.This electrocardioscanner substitutes common chest lead with the hand contact electrode as the mode of electrocardiogram acquisition or extremity lead, and greatly facilitates cardiac electrical measurement.Detector adopts the high speed microprocessor that has the internal hardware multiplier simultaneously, can finish digital signal processing algorithm fast, has realized real-time demonstration, analysis, has detected and judge common ARR function.

For achieving the above object, this utility model has adopted following technical scheme:

The hand-held electrocardio detector comprises housing, and housing is provided with LCDs, switch key, begins to measure button, stops to measure button, data upload button, USB interface, and the housing side is provided with left hand electrocardioelectrode and right hand electrocardioelectrode.Be provided with microprocessor and the FLASH memorizer that is connected with microprocessor signals, function button circuit in the housing.Differential amplifier circuit, bandwidth-limited circuit, in-phase amplification circuit and A/D change-over circuit are connected in proper order, and wherein the signal output part of A/D change-over circuit is connected with microprocessor, and differential amplifier circuit is connected with right hand electrocardioelectrode with the left hand electrocardioelectrode respectively.LCDs is connected with microprocessor respectively with USB interface.Switch key, begin to measure button, stop to measure button and be connected with the function button circuit respectively with the data upload button.

Microprocessor in this utility model adopts the high speed microprocessor that has the internal hardware multiplier, is mature technology, can obtain by purchase, for example TMS320F2802.Function button circuit in this utility model, differential amplifier circuit, bandwidth-limited circuit, in-phase amplification circuit, A/D change-over circuit and FLASH memorizer all adopt mature technology.Inventive point of the present utility model is above each parts are made up, and provides a kind of hands contact, portable hand-held electrocardio detector.

This utility model utilizes hand contact electrode mode to gather electrocardiosignal.Because thereby cardiac electrical collection must have two different parts of at least two electrode contact body surfaces to constitute differential input, could realize after handling through a series of amplifying circuit, filter circuit then, for instance, after an electrode had been positioned at the human body left hand, another electrode just should place the right hand.For convenience, often adopt the scheme of two electrodes, also can adopt three or more electrode scheme in order to improve capacity of resisting disturbance sometimes, to constitute feedback circuit.In this utility model, adopt the mode of hand contact electrode to constitute differential input, promptly touch two or more contact electrocardioelectrodes that are located on the detector, obtain electrocardiosignal by hand skin.

The electrocardiosignal that extracts by electrocardioelectrode, amplify through differential amplifier circuit, remove High-frequency Interference and low frequency baseline drift by bandwidth-limited circuit then, deliver to the final stage in-phase amplification circuit again and be amplified in the 3V scope, after the A/D change-over circuit is sent into microprocessor.Microprocessor is by being solidificated in software wherein, the real-time ecg wave form that on liquid crystal display screen, shows, finish analysis simultaneously, detect and judge common arrhythmia electrocardiosignal, last detector is kept at the data of gathering and the result of detection in the FLASH memorizer, is convenient to transferring and checking in the future.

This utility model is compared with existing electrocardio product, metering system is convenient, be fit to family and monitoring detection steady in a long-term, employing has the high speed microprocessor of internal hardware multiplier, arithmetic speed is faster, can show, analyze and judge common arrhythmia in real time, can also be by USB interface with data upload to PC.

Description of drawings

Fig. 1 is a surface structure sketch map of the present utility model;

Fig. 2 is a structural representation of the present utility model.

The specific embodiment

As shown in Figure 1, the hand-held electrocardio detector comprises housing, housing is provided with liquid crystal display screen 1, switch key 4, begins to measure button 3, stops to measure button 2, data upload button 6, USB interface 7, and the housing side is provided with left hand electrocardioelectrode 8 and right hand electrocardioelectrode 5.

As shown in Figure 2, microprocessor 14 links to each other with liquid crystal display screen 1, FLASH memorizer 13, function button circuit 15, USB interface 7, A/D change-over circuit 12.Function button circuit 15 is connecting switch key 4 respectively, is beginning to measure button 3, is stopping to measure button 2 and data upload button 6, utilizes above four buttons, the operation of operation detection instrument.Differential amplifier circuit 9, bandwidth-limited circuit 10, in-phase amplification circuit 11 and the 12 order series connection of A/D change-over circuit, wherein the signal output part of A/D change-over circuit 12 is connected with microprocessor 14, and differential amplifier circuit 9 is connected with right hand electrocardioelectrode 5 with left hand electrocardioelectrode 8 respectively.Touch left hand electrocardioelectrode 8 and right hand electrocardioelectrode 5 respectively with the left hand and the right hand during use, extract electrocardiosignal.This electrocardiosignal is through differential amplifier circuit 9 filtering common mode disturbances, then through the baseline drift of bandwidth-limited circuit 10 with removal High-frequency Interference and low frequency, delivering to final stage in-phase amplification circuit 11 again is amplified to signal in the 3V scope, be converted into digital signal by A/D change-over circuit 12 at last, read by microprocessor 14.Microprocessor 14 control liquid crystal display screens 1 show ecg wave form in real time, finish in real time simultaneously the electrocardiosignal of gathering is analyzed and detected, detector provides the result of judgement automatically after measuring process finishes, automatically the data of gathering and the result of detection are kept in the FLASH memorizer 13 simultaneously, are convenient to transferring and checking in the future.Can preserve electrocardiogram (ECG) data and the result of long period in the FLASH memorizer continuously, meet the needs of long-time monitoring and detection.Simultaneously for ease of data management, user can also be by USB interface 7 with the data upload of storage to PC.

The concrete using method of detector is as follows:

Open switch key 4, make detector in running order.The user left hand left hand electrocardioelectrode 8 of holding with a firm grip then, the right hand is pinned right hand electrocardioelectrode 5, the electrocardioelectrode 8 of can certainly the right hand holding with a firm grip, left hand is pinned electrocardioelectrode 5, and electrocardiosignal just can be extracted out like this.Press begin to measure button 3 after, begin to detect electrocardiosignal, should keep right-hand man's posture constant this moment, measure to finish until this time.After extracting ground electrocardiosignal passing through the effect of differential amplifier circuit, bandwidth-limited circuit and final stage amplifying circuit successively, by sending into microprocessor behind the A/D change-over circuit digitized.Liquid crystal display screen 1 will show the ecg wave form that collects in real time and show detected heart rate numerical value this moment, when press stop to measure button 2 after, this time measured and finished, detector shows the result who this time detects automatically, and automatically initial data is saved in the FLASH memorizer with relevant result, user can be by data upload button 6 with the data upload PC.

Claims

1, a kind of hand-held electrocardio detector, comprise housing, it is characterized in that housing is provided with LCDs, switch key, begins to measure button, stops to measure button, data upload button, USB interface, the housing side is provided with left hand electrocardioelectrode and right hand electrocardioelectrode; Be provided with microprocessor and the FLASH memorizer that is connected with microprocessor signals, function button circuit in the housing; Differential amplifier circuit, bandwidth-limited circuit, in-phase amplification circuit and A/D change-over circuit are connected in proper order, and wherein the signal output part of A/D change-over circuit is connected with microprocessor, and differential amplifier circuit is connected with right hand electrocardioelectrode with the left hand electrocardioelectrode respectively; LCDs is connected with microprocessor respectively with USB interface, switch key, begins to measure button, stops to measure button and be connected with the function button circuit respectively with the data upload button.