CN105686825A

CN105686825A - Double-stage wearable household electrocardiocorder and method thereof

Info

Publication number: CN105686825A
Application number: CN201610128914.5A
Authority: CN
Inventors: 冯靖祎; 郑骏; 李顶立; 楼理纲; 毛彬; 王吉鸣; 吕颖莹
Original assignee: Zhejiang University ZJU
Current assignee: Zhejiang University ZJU
Priority date: 2016-03-07
Filing date: 2016-03-07
Publication date: 2016-06-22

Abstract

The invention discloses a double-stage wearable household electrocardiocorder and a method thereof. The electrocardiocorder comprises a shell, a bipolar lead electrode, a signal filtering, amplifying and conditioning circuit and a CPU, wherein the bipolar lead electrode, the signal filtering, amplifying and conditioning circuit and the CPU are arranged in the shell. The microprocessor is further connected with a memory card. The shell is provided with a switch/emergency button and an indicator lamp. A power module and a charge circuit are further arranged in the shell. The bipolar lead electrode is connected with the signal filtering, amplifying and conditioning circuit. The signal filtering, amplifying and conditioning circuit, the switch/emergency button, the indictor lamp, the memory card and a data communication module are connected with the CPU. The signal filtering, amplifying and conditioning circuit, the CPU, the switch/emergency button, the indicator lamp, the memory card and the data communication module are connected with the power module. The charge circuit is connected with the power module. The electrocardiocorder is convenient to operate and suitable for household use; by means of a fixing mode in which patches and binding belts are adopted, it can be avoided that motion interference is caused when a user moves to drag a lead wire.

Description

The wearable domestic electrocardiorecorder of twin-stage and method thereof

Technical field

The present invention relates to medical instruments field, be specifically related to a kind of wearable domestic electrocardiorecorder of twin-stage and method thereof。

Background technology

Cardiovascular disease is one of disease that in the world today, the threat mankind are the most serious, and its M & M exceedes neoplastic disease and leaps to the first。Because the time of this disease form of expression and morbidity inconsistent, so in existing medical model and system, prevention and the diagnosis and treatment of cardiovascular disease there is also inconvenience。So, the family of high-risk group gets involved the important method being to prevent cardiovascular disease early stage。The electrocardiographic recording equipment developing family easy-to-use is to aid in solving the effective ways of above contradiction。

Current existing dynamic electrocardiogram recording instrument adopts the mode that conducting wire connects human body to gather electrocardiosignal, and small product size is big, quality weight, and complicated operation carries inconvenience。In use procedure, easily involve conducting wire during motion, cause electrode delamination or loose contact, thus causing interference signal, and being likely to misjudged one-tenth abnormal electrocardiogram signal, affecting clinical diagnosis largely。

Summary of the invention

It is an object of the invention to solve problems of the prior art, and a kind of wearable domestic electrocardiorecorder of twin-stage is provided。

For achieving the above object, adopt the following technical scheme that

A kind of wearable domestic electrocardiorecorder of twin-stage, including: housing and be arranged on the bipolar lead electrode in described housing, modulate circuit, CPU processor are amplified in signal filtering；Described microprocessor has been also respectively connected with storage card；Described housing is provided with switch/danger button and display lamp；Power module, charging circuit it is additionally provided with in described housing；Described bipolar lead electrode amplifies modulate circuit with described signal filtering and is connected, and described signal filtering amplification modulate circuit, switch/danger button, display lamp, storage card, data communication module are connected with described CPU processor respectively；Described signal filtering amplification modulate circuit, CPU processor, switch/danger button, display lamp, storage card, data communication module are connected with power module；Described charging circuit is connected with power module。

As preferably, described bipolar lead electrode is directly buckled in electrocardio electrode plate, for being connected with human body by electrocardio electrode plate。

As preferably, the wearable domestic electrocardiorecorder of described twin-stage is fixed on human body by self-adhesive elastic bandage and adjusts link position。

As preferably, being additionally provided with acceleration transducer in described housing, described acceleration transducer is connected respectively with CPU processor and power module, for sensing the kinestate change of human body。

As preferably, after described switch/danger button is pressed, the nearly 3 minutes interior electrocardiogram (ECG) datas that bipolar lead electrode monitors write storage card in the way of preferential, and are transmitted to the Internet by data communication module synchronization。

As preferably, described signal filtering is amplified modulate circuit and is included a preamplifier and two grades of amplification band-pass circuits, the amplification of described preamplifier is 3 times, the amplification of two grades of amplification band-pass circuits is 80 times, band connection frequency is 0.5-100Hz, to remove baseline drift in signal and high-frequency noise, and electrocardiosignal is made to be amplified to the amplitude that applicable CPU processor gathers。

As preferably, described charging circuit adopts MAX1555 charging chip, described power module is divided into two-way by after reduction voltage circuit 1, one tunnel for for CPU processor, display lamp, storage card, data communication module for power supply, another road further by after reduction voltage circuit 2 for amplifying modulate circuit energising for signal filtering；Described reduction voltage circuit 1 is for the 3.7V power voltage step down that provided by power module to 3.3V；Described reduction voltage circuit 2 is for the 3.3V power voltage step down that provided by reduction voltage circuit 1 to 3.0V, it is suppressed that owing to the noise introducing power module that modulate circuit energising causes, the signal to noise ratio of raising electrocardiosignal are amplified in signal filtering。

Another object of the present invention is to provide a kind of electrocardiogram (ECG) data recording method using described electrocardiorecorder, comprise the steps:

1) user starts record by button, and CPU processor reads the temporal information of real-time clock, as the time reference of this record；

2) signal data that CPU processor collection exports from electrocardiosignal modulate circuit, places the data into relief area；

3) if relief area is not filled up, then the 2nd is returned) step continuation collection signal data；

4) if relief area is filled, buffered data is write storage card；

5) data of CPU processor synchronous acquisition acceleration transducer, if recognizing motion disturbance signals, then automatically to synchronous acquisition to electrocardiosignal carry out interference labelling；

6) if the electrocardiogram (ECG) data record of electrocardiorecorder is not over, then the 2nd is returned) step；If record end, CPU processor stops data collection。

The invention has the beneficial effects as follows:

1, the present invention adopts two crosslinking electrodes to be directly buckled in this electrocardiorecorder of the mode in electrocardio electrode plate to be directly connected with human body。Operate more convenient, be suitable for family and use；

2, present configuration is compact, and small and exquisite merrily and lightheartedly paster adds the fixed form of restraining, can avoid involving conducting wire during user movement and the motion artifacts that causes；

3, the invention provides a kind of use portable, easy, can the DCG Recorder of wirelessly transmitting data, within continuous more than 24 hours, user's electrocardio-activity situation can be continued to monitor, enable users to by shirtsleeve operation, understand cardiac health whenever and wherever possible。

4, the present invention adopts button, user can labelling from press after danger button 3 minutes interior electrocardiogram (ECG) datas in the way of preferential record or synchronous transfer to the Internet。

Accompanying drawing explanation

Fig. 1 is the structural schematic block diagram of the wearable domestic electrocardiorecorder of twin-stage；

Fig. 2 is the wearing schematic diagram of the wearable domestic electrocardiorecorder of twin-stage；

Fig. 3 is the workflow diagram of the wearable domestic electrocardiorecorder of twin-stage；

Fig. 4 is the structural representation of CPU processor in the embodiment of the present invention；

Fig. 5 is the circuit theory diagrams of embodiment of the present invention center telecommunications modulate circuit；

Fig. 6 is the theory diagram of power module in the embodiment of the present invention。

Detailed description of the invention

Below in conjunction with accompanying drawing, the present invention is described in further detail, to make those skilled in the art can implement the present invention according to this with reference to description word and corresponding accompanying drawing。

A kind of wearable domestic electrocardiorecorder of twin-stage, including: housing and be arranged on the bipolar lead electrode 1 in described housing, modulate circuit 2, CPU processor 3 are amplified in signal filtering；Described microprocessor has been also respectively connected with storage card 5；Described housing is provided with switch/danger button 6 and display lamp 7；Power module 8, charging circuit 9 it is additionally provided with in described housing；Described bipolar lead electrode 1 amplifies modulate circuit 2 with described signal filtering and is connected, and described signal filtering is amplified modulate circuit 2, switch/danger button 6, display lamp 7, storage card 5, data communication module 4 and is connected with described CPU processor 3 respectively；Described signal filtering amplification modulate circuit 2, CPU processor 3, switch/danger button 6, display lamp 7, storage card 5, data communication module 4 are connected with power module 8；Described charging circuit 9 is connected with power module 8。

Consider that the convenience that family uses, bipolar lead electrode 1 can adopt directly to be buckled in electrocardio electrode plate, for being connected with human body by electrocardio electrode plate。It addition, the wearable domestic electrocardiorecorder of twin-stage can be fixed on human body by self-adhesive elastic bandage and adjust link position。Being also provided with acceleration transducer in housing, described acceleration transducer is connected respectively with CPU processor 3 and power module 8, for sensing the kinestate change of human body, reduces motion artifacts。

Switch/danger button 6 can pass through to arrange multiple keystroke pattern and realize switching on and shutting down, enters the functions such as emergency mode。After described switch/danger button 6 is pressed, the nearly 3 minutes interior electrocardiogram (ECG) datas that bipolar lead electrode 1 monitors write storage card 5 in the way of preferential, and by data communication module 4 synchronous transfer to the Internet。

Described signal filtering is amplified modulate circuit 2 and is included a preamplifier and two grades of amplification band-pass circuits, the amplification of described preamplifier is 3 times, the amplification of two grades of amplification band-pass circuits is 80 times, band connection frequency is 0.5-100Hz, to remove baseline drift in signal and high-frequency noise, and electrocardiosignal is made to be amplified to the amplitude that applicable CPU processor 3 gathers。

Described charging circuit 9 adopts MAX1555 charging chip, described power module 8 is divided into two-way by after reduction voltage circuit 1, one tunnel is for powering for CPU processor 3, display lamp 7, storage card 5, data communication module 4, and another road is used for amplifying modulate circuit 2 for signal filtering and is energized after passing through reduction voltage circuit 2 further；Described reduction voltage circuit 1 is for the 3.7V power voltage step down that provided by power module 8 to 3.3V；Described reduction voltage circuit 2 is for the 3.3V power voltage step down that provided by reduction voltage circuit 1 to 3.0V, it is suppressed that owing to the noise introducing power module 8 that modulate circuit 2 energising causes, the signal to noise ratio of raising electrocardiosignal are amplified in signal filtering。

4) if relief area is filled, buffered data is write storage card；

It is specifically described the wearable domestic electrocardiorecorder of twin-stage of the present invention by the examples below。In the present embodiment, the technical characteristic of non-particular determination is all as hereinbefore。

Embodiment 1

The SMD dynamic electrocardiogram recording instrument of one disclosed by the invention, its housing periphery length is less than 100mm, and width is less than 60mm, and thickness is less than 20mm, and complete machine weight is less than 40g。

Fig. 1 is the structural schematic block diagram of the wearable domestic electrocardiorecorder of twin-stage of the present invention, and described SMD dynamic electrocardiogram recording instrument includes: modulate circuit 2, CPU processor 3 are amplified in bipolar lead electrode 1, signal filtering；Described microprocessor has been also respectively connected with storage card 5；Described housing is provided with switch/danger button 6, display lamp 7；Power module 8, charging module 9 it is additionally provided with in described housing；Described bipolar lead electrode 1 amplifies modulate circuit 2 with described signal filtering and is connected, and described data communication module 4, storage card 5, button 6, display lamp 7 are connected with described microprocessor 3 respectively；Described heart signal filtering is amplified modulate circuit 2, microprocessor 3, is connected with power module 8 according to communication module 4, storage card 5, switch and danger button 6, display lamp 7；Described charging circuit 9 is connected with power module 8。

Power module is that recorder is powered, bipolar lead electrode connects human body and modulate circuit is amplified in signal filtering, body surface ecg is transmitted to signal filtering and amplifies the input of modulate circuit, signal filtering is amplified modulate circuit and electrocardiosignal is amplified, after filtering, the A/D modular converter input of single-chip microcomputer is arrived in output, signal filtering is amplified the right leg drive output of modulate circuit and is taken back human body by bipolar lead electrode, the single-chip microcomputer electrocardiogram (ECG) data to collecting carries out buffer-stored, when buffered data reaches a certain amount of, single-chip microcomputer writes the data to memory card in bursts, user is by switching and danger button 6, display lamp 7 and single-chip microcomputer interact operation, realize the beginning/function such as stopping and emergent record of record。Data in storage card can pass through wireless transport module or USB communication module sends to receiving terminal。

ECG signal collection is adopted modular design, is mainly amplified modulate circuit by the sensor that leads of front end, signal filtering and A/D sample circuit forms。The primary frequency range of human ecg signal is 0.05～100Hz, and amplitude is about 0～4mV, and signal is very faint。Simultaneously electrocardiosignal is generally contaminated with other bioelectrical signals, in addition the external interference of electromagnetic field based on 50Hz Hz noise so that relatively by force, measuring condition is more complicated for electrocardio noise background。What therefore the selection of device showed is extremely important, it is desirable to device error is only small, and stable work in work。

Fig. 5 is the circuit theory diagrams of the electrocardiosignal modulate circuit of the present invention。Filtering and amplifying circuit includes a preamplifier (such as instrument amplifier U2 and the resistance R1 circuit formed) and two grades of amplification band-pass circuits (such as operational amplifier U3A, U3B, electric capacity C1, C11, the circuit that resistance R2, R6, R9 form), the amplification of preamplifier is 3 times, the amplification of two grades of amplification band-pass circuits is 80 times, band connection frequency is 0.5-100Hz, to remove baseline drift in signal and high-frequency noise, and electrocardiosignal is made to be amplified to the amplitude that applicable microprocessor gathers。The reference voltage that voltage references U6 produces is as the signal reference ground of electrocardiosignal modulate circuit, voltage with reference to ground is advisable with the half of the microprocessor A/D reference voltage changed, instrument amplifier in foregoing circuit can adopt the INA333 of TI company, operational amplifier can adopt the TLV2452 of TI company, and voltage references can adopt the REF2912 of TI company。

Specifically, its work process is: the faint electrocardiosignal that first cardiac diagnosis lead collection comes is amplified by pre-amplification circuit, and application right leg drive is to suppress the driving of common mode disturbances, shielding line to eliminate lead-in wire interference。Power Management Design should apply to the application scenario of low-voltage, low-power consumption。Realize higher common mode rejection ratio, temperature stability, amplification band width, the features such as noise coefficient is little。Signal after amplification is filtered, 50Hz trap carries out secondary amplification after processing again。Filtering adopts high (low) bandpass filter circuit of voltage controlled voltage source second order, disturbs signal for the myoelectricity etc. eliminated beyond 0.05Hz～100Hz frequency band, and all the other higher hamonic waves in power frequency also can be filtered out。Meanwhile, active pair of T rejector circuit is adopted to suppress 50Hz Hz noise further。

If Fig. 4, AT89C51 are a kind of with the low-voltage of 4K byte FLASH memory (FPEROM FlashProgrammableandErasableReadOnlyMemory), high-performance CMOS 8 bit CPU processor, it is commonly called as single-chip microcomputer。AT89C2051 is a kind of single-chip microcomputer with 2K byte Flash-Programmable erasable read-only memory。The erasable read-only memory of single-chip microcomputer can be wiped 1000 times repeatedly。

LPC213X is based on the microcontroller of 16/32 ARM7TDMI-S (TM) CPU of real-time simulation and tracking。Less encapsulation and extremely low power consumption make LPC213X be highly suitable for the soft modem sound discrimination of communication gate protocol converter and low side imaging technique, there is provided between the buffer empty met for them and impayable process function, be particularly well-suited to Industry Control and portable medical system。

The mentality of designing of charging circuit by peripheral circuit built to charging requirement meet。The program has the excellent specific properties such as high voltage, high electric current and high efficiency, and is integrated with reverse leakage current protection and internal loop compensation electric current。Its encapsulation is small and exquisite, not only can save plate level space but also can significantly shorten the design time。Fig. 6 is the theory diagram of power module in the present embodiment, the circuit of this power module includes charging circuit and reduction voltage circuit two parts, charging circuit adopts high safe and reliable chip, the MAX1555 charging chip of Maxim company can be adopted, it is little that this chip has encapsulation volume, conversion efficiency is high, it is necessary to the feature that peripheral cell is few。The 3.7V power voltage step down that 1 battery of reduction voltage circuit provides is microprocessor, button, display lamp, storage card and data communication module for power supply to 3.3V, the DVCC of output。The 3.3V that reduction voltage circuit 1 provides is dropped to 3.0V by reduction voltage circuit 2, suppress to be introduced the noise of power supply by digital circuits section, the AVCC of output provides the power supply of low noise for electrocardiosignal modulate circuit, improve the signal to noise ratio of electrocardiosignal, reduction voltage circuit should select the good LDO of the linearity, such as the low voltage difference blood pressure lowering chip TPS77030 of TI company。

Fig. 2, the wearable domestic electrocardiorecorder of described twin-stage is connected with electrode patch, gluing and be fixed on the human body midclavicular line such as figure and the position of nipple center line, described self-adhesion restraining winds with one circuit through left shoulder and right arm oxter and strengthens fixing by wearable for twin-stage domestic electrocardiorecorder。

As it is shown on figure 3, the wearable domestic electrocardiorecorder of twin-stage is after charging being fixed on human body assigned position, length presses switch/danger button 3 seconds, and power supply indicator is bright, and monitor is started working；The electrocardiosignal write storage card gathered；Such as the command signal without switch/danger button, continuation gathers electrocardiosignal write storage；When instantaneous click switch/danger button 1 time, 3 minutes interior electrocardiogram (ECG) datas after this command signal of labelling, open wireless connections simultaneously and upload this flag data；When pressing switch/danger button 3 seconds, quit work and can manual transmission data。

As shown in table 1, described twin-stage wearable domestic electrocardiorecorder is positioned over same normal person with tradition Holter and is simulated experiment, records data such as table 1 after 24 hours。Abnormal 2 situations of heart rate are less than 1%。Other statistical datas represent that twin-stage wearable domestic electrocardiorecorder alternative tradition Holter uses as the family of cardiovascular disease。

The wearable domestic electrocardiorecorder of table 1 twin-stage and tradition Holter contrast test

Claims

1. the wearable domestic electrocardiorecorder of twin-stage, it is characterised in that including: housing and the bipolar lead electrode (1) being arranged in described housing, signal filtering amplification modulate circuit (2), CPU processor (3)；Described microprocessor has been also respectively connected with storage card (5)；Described housing is provided with switch/danger button (6) and display lamp (7)；Power module (8), charging circuit (9) it is additionally provided with in described housing；Described bipolar lead electrode (1) is amplified modulate circuit (2) with described signal filtering and is connected, and described signal filtering amplification modulate circuit (2), switch/danger button (6), display lamp (7), storage card (5), data communication module (4) are connected with described CPU processor (3) respectively；Described signal filtering amplification modulate circuit (2), CPU processor (3), switch/danger button (6), display lamp (7), storage card (5), data communication module (4) are connected with power module (8)；Described charging circuit (9) is connected with power module (8)。

2. the wearable domestic electrocardiorecorder of twin-stage according to claim 1, it is characterised in that: described bipolar lead electrode (1) is directly buckled in electrocardio electrode plate, for being connected with human body by electrocardio electrode plate。

3. the wearable domestic electrocardiorecorder of twin-stage according to claim 1, it is characterised in that: the wearable domestic electrocardiorecorder of described twin-stage is fixed on human body by self-adhesive elastic bandage and adjusts link position。

4. the wearable domestic electrocardiorecorder of twin-stage according to claim 1, it is characterized in that: in described housing, be additionally provided with acceleration transducer, described acceleration transducer is connected respectively with CPU processor (3) and power module (8), for sensing the kinestate change of human body。

5. the wearable domestic electrocardiorecorder of twin-stage according to claim 1, after it is characterized in that described switch/danger button (6) is pressed, the nearly 3 minutes interior electrocardiogram (ECG) datas that bipolar lead electrode (1) monitors write storage card (5) in the way of preferential, and by data communication module (4) synchronous transfer to the Internet。

6. the wearable domestic electrocardiorecorder of twin-stage according to claim 1, it is characterized in that: described signal filtering is amplified modulate circuit (2) and included a preamplifier and two grades of amplification band-pass circuits, the amplification of described preamplifier is 3 times, the amplification of two grades of amplification band-pass circuits is 80 times, band connection frequency is 0.5-100Hz, to remove baseline drift in signal and high-frequency noise, and electrocardiosignal is made to be amplified to the amplitude that applicable CPU processor (3) gathers。

7. the wearable domestic electrocardiorecorder of twin-stage according to claim 1, it is characterized in that: described charging circuit (9) adopts MAX1555 charging chip, described power module (8) is by being divided into two-way after reduction voltage circuit 1, one tunnel is for powering for CPU processor (3), display lamp (7), storage card (5), data communication module (4), and another road is further by being used for after reduction voltage circuit 2 as signal filtering amplification modulate circuit (2) energising；Described reduction voltage circuit 1 is for the 3.7V power voltage step down that provided by power module (8) to 3.3V；Described reduction voltage circuit 2 is for the 3.3V power voltage step down that provided by reduction voltage circuit 1 to 3.0V, it is suppressed that owing to the noise of the introducing power module (8) that modulate circuit (2) energising causes, the signal to noise ratio of raising electrocardiosignal are amplified in signal filtering。

8. the electrocardiogram (ECG) data recording method using electrocardiorecorder described in claim 1, it is characterised in that comprise the steps:

4) if relief area is filled, buffered data is write storage card；