CN2174162Y - Dynamic cardioelectric monitoring instrument - Google Patents

Abstract

The utility model relates to a dynamic electrocardiograph analytic technique, in particular to a dynamic electrocardiograph monitor, composed of two parts that is a host machine and a branch machine. The host machine is composed of a CPU, a data memory, a communication interface, a digital-to-analog converter, an analog channel and a display device. The branch machine comprises an analogue signal amplifying circuit, a filter circuit, an analogue-to-digital converting circuit, a CPU, the communication interface, the data memory, etc. The branch machine is used for carrying out the record and the analysis of the electrocardiograph datum carried by the patients. The host machine extracts the datum by the branch machine, and then the doctor makes a diagnosis to the state of an illness. The machine overcomes the problem of high cost and long analysis time of the Hotor monitor, etc. The dynamic electrocardiograph monitor can be used for the human body's electrocardiograph monitoring and the state of an illness diagnosis of various hospitals and patients.

Description

Dynamic cardioelectric monitoring instrument

This utility model relates to the dynamic electrocardiogram analytical technology, particularly a kind of dynamic electrocardioscanner.

At present, the dynamic electrocardiogram analytical technology is to adopt tape or quasiconductor that the electrocardiosignal of patient's whole day is given record, the part electrocardiosignal that reference value is arranged will be extracted then after the recorded employing computer analysis, under area of computer aided, finish diagnosis, the equipment that this method adopts is called the Hotor(monitor), Hotor system cost costliness, and occupy with the time of microcomputer longer when analyzing, generally more than 50 minutes, in addition, patient must be responsible for finishing by special doctor when carrying out the electrocardiosignal record to hospital.

The purpose of this utility model provides a kind of with low cost, and is easy to use, and patient can oneself write down effective ecg information at any time, and short dynamic electrocardiogram recorder analyser of MICROCOMPUTER PROCESSING time.

Dynamic electrocardiogram recorder analyser described in the utility model is made up of main frame and extension set two parts, main frame and extension set are separate, simultaneously, main frame can extract necessary information from extension set, in order to the operation according to the doctor information under the analytic record of regaining is exported.Wherein, above-mentioned extension set comprises analogue signal amplification, filtering, analog digital conversion, communication interface, CPU, data memory, control logic etc.The electrocardiosignal of being gathered by human body is behind high-impedance preamplifier, carry out filtering through band filter and low pass filter again, realization is to the interferential decay of power frequency, and filtering High-frequency Interference effectively, at this moment, filtered signal, is stored data by software by cpu central processing unit through analog digital conversion, simultaneously, finish multilamellar filtering by software to signal, layering is discerned, and finally extracts each eigenvalue of electrocardiosignal, in order to judge whether pathological changes takes place, if morbidity becomes, five seconds electrocardiogram before and after then writing down, and send warning, simultaneously to there being related parameter to handle; Control logic is after by software various electrocardiosignaies being judged, sends instruction by CPU and makes peripheral logic chip produce actuation of an alarm.Host machine part is by CPU, data memory, communication interface, digital-to-analogue conversion and analog channel and display device are formed, main frame is with after extension set is connected, accept the various information that extension set sends with the form of data, and deposit data memory in, finish analogue signal output or show and printer output by software.

Because this utility model has adopted modern advanced person's the electronic technology and the chips such as low-cost CPU, data memory of mass selling in the market, so it is with low cost, simultaneously, date processing to relevant parameter is to be finished by the extension set that patient carries, so need not the post processing of carrying out consuming time behind the data fetch of main frame to extension set, saved the time, this lacks than the Hotor system is consuming time; When extension set is gathered relevant data, directly finish by patient, easy to use.

Followingly this utility model is further described with reference to accompanying drawing.

Fig. 1 is the theory diagram of this utility model extension set.

Fig. 2 is the theory diagram of this utility model main frame.

Fig. 3 is this utility model filter circuit schematic diagram

Fig. 4 is this utility model data holding circuit schematic diagram

Fig. 5 is the program principle block diagram of this utility model extension set

Fig. 6 is the program principle block diagram of this utility model extension set

Referring to Fig. 1, the electrocardiosignal of being gathered by human body is behind the preamplifier of high impedance, gain improves about 100 times, pass through the 50Hz band elimination filter and the 70HZ low pass filter of particular design then, respectively electrocardiosignal is carried out filtering, with about 30 times of power frequency interference attenuation, and filtering High-frequency Interference effectively, at this moment, will carry out analog digital conversion through the signal of filtering, pass through software, finish the storage of data by CPU, and relevant data is sent into data memory, simultaneously, realize transmission between data and the main frame by communication interface in extension set, control logic is sent instruction by CPU and peripheral logic chip is produced report to the police.

Referring to Fig. 2, by the data that communication interface is imported into from extension set, CPU sends data into data memory by software control, simultaneously data is imported analog channel after digital-to-analogue conversion, convert analogue signal output to, also data can be shown by display device or printing equipment prints.

Referring to Fig. 3 because the electrocardiosignal of amplifying through amplifier has High-frequency Interference and power frequency is disturbed, must decay to its two kinds of interference, this utility model specialized designs a kind of active filter with high-performance filter circuit, by R ₂, R ₉, C ₁, C ₂, C ₃And A ₁, A ₂Form 50Hz band elimination filter and 70Hz low pass filter, can be with 30 times of power frequency interference attenuation, R ₇, R ₈, C ₄, C ₅Form second order filter, can suppress the interference of higher hamonic wave effectively, the upper frequency limit that makes complete machine is 70Hz, integrated circuit A ₁, A ₂Adopt μ A741 model.

Referring to Fig. 4, when preventing that power source voltage Vcc from dropping into to a certain degree, the loss of data that produces, this utility model has adopted the data holding circuit of particular design to the data memory of extension set and main frame, and it adopts elements such as simple diode, audion to constitute.As supply voltage V _CCJust often, D ₁, D ₂, D ₄Conducting, supply voltage directly are added on the data memory, and the chip selection signal of CPU passes through D ₂, D ₄Directly choose data memory.

As supply voltage V _CCWhen dropping into to a certain degree, T ₁Conducting, backup battery V _BAKMake D ₃, D ₅Conducting, the sheet choosing that is added to data memory is held

, because D is arranged ₁, D ₂, D ₄Isolation, backup battery U _BAKCan add on the data memory with very faint power supply, thereby data are kept, RAM adopts 62256 models.

Referring to Fig. 5,, judge it is playback or record data then at first to system initialization, if playback then with the main frame hook, is accepted Host Command, carry out transfer of data, if image data then waited in record, deposit relief area in, the back is judged data according to being provided with, if reach set ultimate value, warning is set then; Otherwise then data are carried out fixing operation, be about to buffer pointer after data take out, the parameter according to the storage portions pointer writes storage portions with it, after enter diagnosis and identification module, return waiting state at last.

Referring to Fig. 6, connect machine with extension set after, at first be taken into initial data, then data are carried out filtering, next judges whether the electrocardiosignal test initialization is finished, if the electrocardiosignal initialization is finished, then electrocardiosignal is judged, otherwise it is initialization is carried out in detection to electrocardiosignal, then carries out abnormality judging program, if unusual, then carrying out state of an illness diagnosis and result judges, final program finishes, and the result is not unusual, then EP (end of program).

Claims (3)

1, a kind of dynamic electrocardioscanner, comprise analog circuit and digital circuit, it is characterized in that it is made of main frame and extension set two parts, main frame comprises that CPU, data memory, communication interface, digital-to-analogue conversion, analog channel and display device constitute, data memory, communication interface, display device, D/A converting circuit are connected with CPU respectively, after D/A converting circuit, connect analog channel, for simulation output; Extension set comprises analogue signal amplification, filter circuit, analog digital conversion, CPU, communication interface, data memory, control logic, analog digital conversion, communication interface, data memory, control logic are connected with CPU respectively, be connected with filter circuit at the analog to digital conversion circuit front end, this filter circuit is connected with amplifying circuit of analog signal simultaneously, and amplifying circuit of analog signal receives the electrocardiosignal from human body.

2, monitor according to claim 1 is characterized in that described filter circuit is connected in sequence by a band elimination filter and a low-cut filter.

3, monitor according to claim 1 is characterized in that a data holding circuit is arranged on the data memory in the described extension set, and it is by peripheral cell D ₃, D ₅, R ₁₁, R ₁₂, C ₈Constitute D with crystal triode ₃, D ₅Be connected the sheet choosing end of memory

And between the base electrode of crystal triode.

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