CN105496400A - Portable multilead wireless electrocardiogram monitoring apparatus and method - Google Patents

Abstract

The invention provides a portable multilead wireless electrocardiogram monitoring apparatus and method, comprising an electrocardiogram acquisition module, a controller and a terminal apparatus; the electrocardiogram acquisition module is used for acquiring human body electrocardiogram signals in real time; the controller comprises a data processing module, a wireless communication module and a power module; the terminal apparatus receives disposed real-time electrocardiogram signal data transmitted by the controller through the wireless communication module or a communication interface unit, storing the data through a built-in storage module, and displaying through a built-in display screen electrocardiogram waveform corresponding to the processed real-time electrocardiogram signals. By using sensor technology in connection with embedded technology and wireless communication technology, the portable multilead wireless electrocardiogram monitoring apparatus is given small size, portability, low cost and operational simplicity, and this apparatus is powered via a battery, displays electrocardiograms through a cellphone, and displays the data on a computer and enables information teletransmission via a network.

Description

Portable multi-lead wireless electrocardiograph monitoring Apparatus and method for

Technical field

The present invention relates to Based Intelligent Control and technical field of medical equipment, particularly a kind of portable multi-lead wireless electrocardiograph monitoring Apparatus and method for.

Background technology

Cardiovascular death number accounts for the first place of the total cause of death of urban and rural residents, inherited genetic factors, meals are unreasonable, smoking, drink and lack the bad life habits such as motion, cause cardio-cerebal blood vessel diseases dangerous factor fashion trend obvious, the ill people's sum of cardiovascular and cerebrovascular disease is in growing trend.

Cardiopathic outbreak has randomness and danger, and cardiac needs the long-term heart paying close attention to oneself, regularly or at any time asks the help of doctor.Therefore, setting up the long distance monitoring and Rescue System that effectively extend to beyond hospital, is the effective way improving Prevention of cardiovascular disease level.The hardware condition that China's long distance monitoring relies on improving just progressively, the popularizing of mobile communication technology, common computer communication network is moved towards family for monitoring from hospital and is provided strong technical support, illustrates wide prospect.

Electrocardiograph is one of important instrument of diagnosis of heart disease, can provide ecg wave form the most intuitively for doctor.Medical institutions generally use multi-lead (maximum 18 lead) electrocardiograph.The each ripple of multi-lead electrocardiogram energy synchronous recording energy objective expression, section and interval, can to early rich, tachycardia, preexcitation syndrome, bundle-branch block and fascicular block etc. position Diagnosis and differential diaggnosis; By electrocardiogram (ECG) data stored in data base, the statistical procedures of various electrical quantity can be carried out, for clinical treatment and research work bring great convenience.

Although multi-lead electrocardiograph spreads to basic medical unit, also spread to family far away, trace it to its cause, mainly equipment volume is huger, carries inconvenience, operation more complicated.Cause Consumer's Experience not good, this family greatly hindering multi-lead ECG detecting equipment popularizes.

China Patent Publication No. is CN102488511A, this patent of invention discloses a kind of 3G cardioelectric monitor system, 3G wireless data transmission is utilized to solve the monitoring providing the physiologic informations such as 24 hours continuous print electrocardios for patient, the problem that patient can move freely, but this 3G cardioelectric monitor system bulk is huger, carry inconvenience, operation more complicated, this family greatly hindering ECG detecting equipment popularizes.

Summary of the invention

Object of the present invention is intended at least solve one of described technological deficiency.

For this reason, one object of the present invention is to propose a kind of portable multi-lead wireless electrocardiograph monitoring equipment with ECG signal sampling and process, signal characteristic abstraction and data transmission.

To achieve these goals, the embodiment of one aspect of the present invention provides a kind of portable multi-lead wireless electrocardiograph monitoring equipment, comprising: electrocardiogram acquisition module, controller, terminal unit;

Described electrocardiogram acquisition module is used for Real-time Collection human ecg signal, described electrocardiogram acquisition module comprises conducting wire, chest crosslinking electrode inhales ball, brothers' folder, described conducting wire is connected with controller by the plug that leads, and inhales ball and brothers respectively press from both sides and be connected by contact with chest crosslinking electrode;

Described controller comprises data processing module, wireless communication module, power module, described controller is for controlling described electrocardiogram acquisition module work situation, receive and process described heart real time signal, control described wireless communication module and the heart real time signal wireless after process is transferred to terminal unit, and carry out power source charges by built-in communication interface unit to power module, carry out Data Over Cable transmission with described terminal unit;

The heart real time signal that described data processing module arrives for receiving electrocardiogram acquisition module acquires, is undertaken amplifying and Filtering Processing by heart real time signal;

Described wireless communication module is used for the heart real time Signal transmissions after by process to described terminal unit;

Described power module is used for powering to electrocardiogram acquisition module, controller;

Described terminal unit receives the heart real time signal data after the process that controller transmitted by wireless communication module or communication interface unit, and stored by built-in memory module, and by the ecg wave form corresponding to the heart real time signal after built-in display screen display process.

Further, described data processing module comprises ARM one-chip computer module, communication interface unit, button and LED display circuit;

Described ARM one-chip computer module is for receiving and processing the heart real time signal that electrocardiogram acquisition module acquires arrives;

Described communication interface unit is used for power source charges and the transmission of the data between controller and terminal unit;

Described button and LED display circuit comprise the power supply indicator being used to indicate power supply status and the wireless connections display lamp being used to indicate radio communication connection status, described power supply indicator is connected with described power module, and described wireless connections display lamp is connected with described wireless communication module.

Further, described data processing module also comprises anti-jamming circuit, and the heart real time signal after process is adopted low pass filter process, with the high-frequency signal in the heart real time signal after filtering process by described anti-jamming circuit.

Further, described wireless communication module at least comprises following one: WIFI communication unit, bluetooth-communication unit, 3G/4G communication unit.

Further, the terminal unit of described outside comprises: personal computer or mobile terminal.

Further, described controller also comprises: battery backup system, and described battery backup system is used for by described communication interface unit to described power module charging.

Further, described controller also comprises lead-fail detector testing circuit, described lead-fail detector testing circuit is connected with described conducting wire with described data processing module, for detecting the electrocardiosignal whether received from described conducting wire, if not, judge that described conducting wire comes off, send alarm to described data processing module.

Further, described alarm at least comprises following one: the prompting of auditory tone cues, display lamp, short message prompt.

A kind of portable multi-lead wireless electrocardiograph monitoring method, is characterized in that, comprise the steps:

Self-inspection is carried out after described controller energising;

Setting up with terminal unit of described controller communicates, and judges whether conducting wire comes off by the lead-fail detector testing circuit of described controller, if conducting wire comes off, then sends alarm;

Described electrocardiogram acquisition module acquires human body heart real time signal is also transferred to described controller;

Described controller to described electrocardiogram acquisition module acquires to human ecg signal carry out date processing, and by by process after heart real time Signal transmissions to terminal unit;

Heart real time signal after process stores by described terminal unit, by the ecg wave form corresponding to the heart real time signal after built-in display screen display process, if electrocardiogram (ECG) data is abnormal, sends alarm, and is sent by warning message.

Portable multi-lead wireless electrocardiograph monitoring Apparatus and method for of the present invention, has following beneficial effect:

(1) the present invention is by electrocardiogram acquisition module acquires multi-lead electrocardiosignal, electrocardiosignal is by wireless communication module (bluetooth or WIFI) and terminal unit (mobile phone A PP, notebook or desktop computer) interconnected, shown and record electrocardiosignal by APP software or notebook software.Achieve people's electrocardiogram (ECG) data history store and emergency situation time ecg information real-time Transmission and subsequently by the issue of attending doctor's doctor's advice information, point-of-care personnel are facilitated to process patient's state of an illness, this Systems Theory achieves the functional requirement that patient's electrocardiogram (ECG) data is monitored at any time, cloud service platform can set up user's large data electrocardio archives, and the Population Health monitoring for patients and healthy population has great strategic significance.

(2) the present invention carries out the display of multi-lead electrocardiogram (ECG) data, storage and playback by wireless communication module (bluetooth mode or WIFI pattern) on terminal unit (mobile phone or computer screen), design collection reaches 18 most and leads, the object reaching the real-time storage to people's multi-lead electrocardiogram (ECG) data, monitoring and initial stage heart disease prevention and diagnose.

(3) the present invention utilizes sensor technology to be combined with embedded technology and wireless communication technique, make portable multi-lead wireless electrocardiograph monitoring equipment components and parts used few, volume is little, be easy to carry, cost is low, simple to operate, adopt battery powered, show electrocardiogram by mobile phone, data shown on computers simultaneously and by real-time performance information remote transmitting, for vast heart disease adaptation population, there is great positive effect.

(4) portable multi-lead wireless electrocardiograph monitoring equipment of the present invention had not only been applicable to hospital but also had been applicable to family and individual has the function such as bio-signal acquisition and process, signal characteristic abstraction and data transmission, can realize to human ecg signal non-invasive monitoring, have movable operation, easy to use, support long time continuous working, intelligent display diagnostic result, abnormal physiological condition to report to the police and the feature such as wireless data transmission.

(5) portable multi-lead wireless electrocardiograph monitoring equipment of the present invention adopts the design of wireless communication module and communication interface unit, the transmission of wireless and wired double data can be realized, can also be powered to power module by communication interface unit (USB communication interface), its range of application is very wide.

(6) the present invention adds anti-jamming circuit in hardware designs, makes radio communication substantially not by the impact of external interference in program operation process, the real-time of whole system and good stability.

The aspect that the present invention adds and advantage will part provide in the following description, and part will become obvious from the following description, or be recognized by practice of the present invention.

Accompanying drawing explanation

Above-mentioned and/or additional aspect of the present invention and advantage will become obvious and easy understand from accompanying drawing below combining to the description of embodiment, wherein:

Fig. 1 is the schematic diagram of portable multi-lead wireless electrocardiograph monitoring equipment of the present invention;

Fig. 2 is the structured flowchart of portable multi-lead wireless electrocardiograph monitoring equipment of the present invention;

Fig. 3 is the circuit theory diagrams of ARM one-chip computer module of the present invention;

Fig. 4 is the circuit theory diagrams of electrocardiogram acquisition circuit of the present invention;

Fig. 5 is the circuit theory diagrams of simulation electronic switching switch circuit of the present invention;

Fig. 6 is the circuit theory diagrams of wireless communication module of the present invention (when selecting Bluetooth communication);

Fig. 7 is the workflow diagram of portable multi-lead wireless electrocardiograph monitoring equipment of the present invention.

Detailed description of the invention

Be described below in detail embodiments of the invention, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Be exemplary below by the embodiment be described with reference to the drawings, be intended to for explaining the present invention, and can not limitation of the present invention be interpreted as.

The present invention proposes a kind of portable multi-lead wireless electrocardiograph monitoring equipment, this equipment designs the collection of a battery powered portable multi-lead electrocardiogram, display and storage system according to Micro Energy Lose sensor technology, single-chip microcomputer and computer technology, it shows electrocardiogram by mobile phone, data shown on computers simultaneously and by real-time performance information remote transmitting, for vast heart disease adaptation population, there is great positive effect.

The fast development of microprocessor technology is the control of body-worn medical real-time, system optimization, service life and the research direction such as security of system and reliability raising provide support.Embedded microprocessor has low-power consumption, Resources on Chip enriches, be widely used and cost performance high, can meet the requirements such as Medical Instruments high-performance, low-power consumption now better, the support of its operating system platform to offer the best guarantee to tele-medicine development for body-worn medical.

The small-sized Wearable multi-lead electrocardiogram monitoring terminal that the present invention had not only been applicable to hospital but also had been applicable to family and individual has the function such as bio-signal acquisition and process, signal characteristic abstraction and data transmission, can realize to human ecg signal non-invasive monitoring, have movable operation, easy to use, support long time continuous working, intelligent display diagnostic result, abnormal physiological condition to report to the police and the feature such as wireless data transmission.

Portable multi-lead wireless electrocardiograph monitoring equipment of the present invention has designed just in above-mentioned technical foundation.

Embodiment

As shown in Figure 1, a kind of portable multi-lead wireless electrocardiograph monitoring equipment of the embodiment of the present invention, comprising: electrocardiogram acquisition module 2, controller 1, terminal unit 3 (personal computer or mobile terminal).

Particularly, electrocardiogram acquisition module 2 is for Real-time Collection human ecg signal, wherein, brothers' folder that electrocardiogram acquisition module 2 comprises conducting wire, is worn on the chest crosslinking electrode of human chest suction ball, is worn on human body brothers place, chest crosslinking electrode is inhaled ball conducting wire and is connected with controller 1 by the plug that leads, and inhales ball and brothers respectively press from both sides and be connected by contact with chest crosslinking electrode.

Wherein, with reference to figure 4-5, electrocardiogram acquisition module 2 comprises electrocardiogram acquisition circuit and simulation electronic switching switch circuit, and electrocardiogram acquisition circuit is wherein completed by BMD101 chip, and BMDl01 is that third generation bio signal detects and equipment in processing blades.It has advanced analog front circuit and Digital Signal Processing structural simulation front-end circuit powerful flexibly by low noise amplifier, induction apparatus come off circuit and ADC composition, BMDl01 has extremely low system noise and high-gain, the electrocardiosignal of microvolt to millivolt can be gathered, then after the proprietary algorithms process of NeuroSky, digital signal is converted into by ADC, store to facilitate user, treatments B MDl01 needs few peripheral circuit, but in order to reach best collection effect, the present invention devises extra PI type filter circuit to power pack, power supply ripple is reduced to suppress common mode disturbances, adopt 3 passage heart real time signals drainage pattern simultaneously, the high performance analog switch S GM3002 that difference is led in the collection employing simulation electronic switching switch circuit of electrocardiosignal switches.

Particularly, with reference to figure 2, controller 1 comprises data processing module, wireless communication module 6 (WIFI communication or Bluetooth communication), power module 9; For controlling electrocardiogram acquisition module work situation, receive and process heart real time signal, control wireless communication module 6 (WIFI communication or Bluetooth communication) and the heart real time signal wireless after process is transferred to terminal unit 3 (personal computer or mobile terminal), in addition, controller 1 also comprises communication interface unit 5 (USB communication interface), power source charges can be carried out to power module 9 by built-in communication interface unit 5 (USB communication interface), Data Over Cable transmission is carried out with terminal unit 3

Wherein, data processing module comprises ARM one-chip computer module 8, communication interface unit (USB communication interface) 5, button and LED display circuit 7, button and LED display circuit 7 comprise the power supply indicator being used to indicate power supply status and the wireless connections display lamp being used to indicate radio communication connection status, power supply indicator is connected with power module 9, wireless connections display lamp is connected with wireless communication module, for receiving the heart real time signal that electrocardiogram acquisition module 2 collects, heart real time signal is carried out amplifying and Filtering Processing, wherein also comprise buzzer and alarm sound is provided, LED provides and runs and connect instruction, button is responsible for start and wireless connections operation.

As the circuit theory diagrams that Fig. 3 is ARM one-chip computer module 8, ARM single-chip microcomputer is the core of whole monitoring terminal, comprises CPU, RAM, ROM and input/output interface.In the selection of processor, need the factor considering the aspects such as its volume, power consumption, performance.Terminal needs to realize data transmission and man-machine interaction, requires that treatment tool is for powerful process and operational capability, for minimizing peripheral cell quantity and volume select the processor with A/D translation function as far as possible.Comprehensive above factor, select STM32F103 chip as CPU, this processor, based on ARM kernel, possesses 32 bit arithmetic abilities, has the interfaces such as UART, GPIO, USB, is conveniently connected with other modules.There is nearly 128Kflash and 20KRAM, general embedded system requirement can be met, power source supplying voltage 2.0-3.6VDC, be applicable to battery powered, core cpu supply voltage is 3.3V, nearly 80 I/O ports, and port supply voltage is 3.3V, passive crystal oscillator is the highest can reach 72Mhz, and holding state electric current can reach 10uA once.

Its middle controller 1 also utilizes embedded software program to complete sampling, send the functions such as electrocardiosignal.

Partially embedded program is as follows:

In addition, data processing module also comprises anti-jamming circuit, and the heart real time signal after process is adopted low pass filter process, with the high-frequency signal in the heart real time signal after filtering process by anti-jamming circuit.

Communication interface unit 5 can adopt USB interface to realize charging and data-transformation facility.

Wherein, wireless communication module 6 for by process after heart real time Signal transmissions to terminal unit 3, at least comprise following one: WIFI communication unit, bluetooth-communication unit.With reference to figure 6, wherein bluetooth-communication unit Bluetooth function is mainly used in the link of terminal and other computers or mobile phone, adopts HC-06 module.

In addition, controller 1 also comprises battery backup system 4 and lead-fail detector testing circuit.Battery backup system 4, for being charged to power module 9 by communication interface unit 5 (USB communication interface), adopts TP4057 chip as chargeable lithium cell charging chip.TP4057 is that a complete single-unit lithium ion battery charged pool both positive and negative polarity reverse connecting protection adopts the linear charger of constant current/constant voltage.Its SOT encapsulates and makes TP4057 become the ideal chose of portable use with less outer member number.TP4057 can be applicable to USB power source and adaptor power supplies work.Owing to have employed inner PMOSFET framework, add anti-down charging circuit, so do not need external sense resistor and isolating diode.Thermal feedback can regulate charging current, to be limited chip temperature under high-power operation or high ambient temperature condition.Charging voltage is fixed on 4.2V, and charging current carries out outer setting by a resistor;

Lead-fail detector testing circuit is connected with conducting wire with data processing module, for detecting the electrocardiosignal whether received from conducting wire, if not, judge that conducting wire comes off, send alarm (alarm at least comprises following one: the prompting of auditory tone cues, display lamp, short message prompt) to data processing module.

In whole work process, power module 9 is for powering to electrocardiogram acquisition module 2, controller 1, and wherein power circuit mainly adopts AS1360 and LM2576 to carry out filtering and voltage stabilizing to externally fed;

In addition, terminal unit 3 receives the heart real time signal data after the process that controller 1 transmitted by wireless communication module 6 (WIFI communication or Bluetooth communication) or communication interface unit 5 (USB communication interface), and stored by built-in memory module, and by the ecg wave form corresponding to the heart real time signal after built-in display screen display process; Wherein terminal unit 3 comprises: personal computer or mobile terminal (mobile phone A PP or panel computer).

An alternative embodiment of the invention also provides a kind of multi-lead wireless electrocardiograph monitoring method, with reference to figure 7, comprises the steps:

Step S501: startup self-detection, carries out self-inspection after controller energising;

Step S502: connect terminal unit, setting up with terminal unit of controller communicates, and performs step S508;

Step S503: data acquisition, electrocardiogram acquisition module by the human body heart real time Signal transmissions that collects to controller;

Step S504: date processing, controller to electrocardiogram acquisition module acquires to human ecg signal carry out date processing, and be transferred to terminal unit;

Step S505: data store, the heart real time signal after process stores by terminal unit, by the ecg wave form corresponding to the heart real time signal after built-in display screen display process, if electrocardiogram (ECG) data is abnormal, performs step S506;

Step S506: emergency alarm, controller sends alarm signal, and performs step S507;

Step S507: receives information and transmission, receives and sends warning message;

Step S508: lead-fail detector detects, and judges whether conducting wire comes off, if conducting wire comes off, then to sending alarm by lead-fail detector testing circuit.

Below multi-lead electrocardiogram acquisition technology is described:

Human body is a conductor, and heart wall shrinks the millivolt level action potential caused makes electric current be transmitted to whole human body by heart, and the electric current propagated produces different electromotive forces at the different parts of human body, can be drawn by electrode in skin surface induction.In order to intactly record the electrical activity situation of heart, 18 kinds of differences in horizontal and vertical direction are led and are noted down, namely I, II, III, aVR, aVL, aVF, V1, V2, V3, V4, V5, V6, V3R, V4R, V5R, V7, V8, V9 lead, amount to 18 and lead.16 electrodes must be laid during measurement on human body, be respectively: right hand electrode VR, left hand electrodes VL, right lower limb electrode RL, left lower limb electrode VF, left chest 6 electrode C1-C6, right breast C3R-C5R, left breast back part V7-V9.According to GB, can synthetic standards multi-lead electrocardiogram by these electrodes, synthesis mode is as follows:

(1) standard limb lead:

Leads I=VL-VR;

Leads I I=VF-VR;

Leads I II=VF-Vl;

(2) augmented unipolar limb lead:

aVR＝VR-(VL+VF)/2；

aVL＝VL-(VR+VF)/2；

aVF＝VF-(VL+VR)/2；

(3) conventional chest lead:

Breast leads Vi=Ci mono-(VR+VL+VF)/3, and in formula, VR, VL, VF and Ci (1-6) represent the current potential of right arm, left arm, left lower limb and thoracic wall.

Based on V6 leads, derive out V7, V8, V9 to left back by certain angle lead, in order to detect the positive rear wall myocardial ischemia of left ventricle, degree of impairment; Based on V1 leads, derive out V3R, V4R, V5R tri-to right back by certain angle lead, in order to detect myocardium of right ventricle ischemia, degree of impairment.

Standard multi-lead electrocardiogram can comprise and leading as follows:

Ⅰ、Ⅱ、Ⅲ、aVR、aVL、aVF、V1、V2、V3、V4、V5、V6、V4R、V5R、V6R、V7、V8、V9

Wherein:

Bipolar limb lead	I II III
		Unipolar extremity lead	aVR aVL aVF
One pole precordial leads	V1 V2 V3 V4 V5 V6
		Right chest lead	V3R、V4R、V5R
Left back thoracic wall leads	V7、V8、V9

Each concrete function of controller is described below

(1) data acquisition

Data acquisition is the key in software function, and STM32F103 is realized by application call SPI program, and hardware drives

Dynamic program is the interface between operating system nucleus and hardware circuit, and application program realizes the control to hardware by call driver.After driver has been write, need to use cross-compiler to compile driver.

(2) data prediction

The baseline drift caused by reasons such as drift, temperature drift, contact resistance variations can make electrocardiosignal produce distortion, but ST, PT section concentration of energy in electrocardiosignal is at low frequency, while removal baseline drift, need the obvious distortion of waveform as far as possible avoiding the sections such as ST section.

The method removing baseline drift conventional has: medium filtering, high-pass filtering, moving average filtering, interpolation fitting, adaptive-filtering etc., and in treatment effect, median filtering method effect is better and calculating is simple.

(3) data store

The electrocardiogram (ECG) data obtained of sampling reduces interference after pretreatment, first needs to be stored in the temporary file in Flash and then sends.The meaning stored not only is the loss of data preventing the reason such as jitter, wireless switching from causing.Adopt continuous acquisition, be interrupted the power consumption that the mode sent can also reduce the modules such as bluetooth, thus reduce the power consumption of whole embedded hardware system.

Size of data

Device coding

Data type

Data content

Ecg information data structure

(4) lead-fail detector detects

Portable patient monitor terminal adopts window comparator as lead-fail detector testing circuit, the every 1s of system detects an input signal, detect that level change is then thought to lead to come off, trigger buzzer and LED warning, prompting patient notes and is reported to the police by lead-fail detector being sent to APP end.

Size of data

Device coding

Data type

Current time

Lead-fail detector data structure

(5) low power dissipation design

Embedded system hardware circuit adopts battery powered, and stand-by time is an important indicator.Power consumption is relevant with the ruuning situation of equipment, and the device that in embedded hardware system, power dissipation ratio is larger is bluetooth or WIFI communication module, have employed continuous acquisition, is interrupted the mode of transmission to reduce the power consumption of module.

A large amount of interference is had to exist in actual environment, in order to avoid signal disturbing, hardware designs adds anti-jamming circuit, software design adds automated wireless linker after going offline, add the rational design of hardware and software of monitoring terminal, in program operation process, radio communication is not substantially by the impact of external interference, the real-time of whole system and stability have good performance, in experimentation, system seldom goes offline, and can re-start from being dynamically connected when signal is good after going offline within the several seconds.

(6) Digital Signal Analysis and Processing

Heart rate is an important physical signs of heart, usually by RR interval analytical calculation.Second-order algorithm calculates the rhythm of the heart, and have the advantages that accuracy is high, amount of calculation is little, be suitable for cloud service system, this algorithm comprises Signal Pretreatment, threshold calculations, inspection policies three part.After detecting R ripple, accurately can not only calculate heart rate, P ripple, QRS wave group and ST section can also be located according to time window, rounded analysis is carried out to ecg information.For data characteristics herein, this algorithm needs to carry out certain improvement.

(7) signal processing

Although monitoring terminal have employed a large amount of circuit to reduce interference, in order to be conducive to signal analysis, also need to carry out digital filtering.In addition, because difference algorithm is to high-frequency signal responsive especially [40], need to adopt low pass filter to remove high-frequency signal.Finally, need to carry out second differnce computing by formula.Y(n)＝X(n)-2X(n-1)+X(n-2)

(8) threshold calculations

Using second differnce computing as the foundation differentiating R ripple, needing in internal memory, set up 3 relief areas, is raw data buffer, second differnce relief area and R crest value relief area respectively.Data in relief area are run according to the order of " first in first out ".Initial data and second differnce relief area, containing the information of 5s time span, are preserved about 10 and have been detected the position of R ripple and corresponding second differnce minimum in R crest value relief area.

In raw data buffer, using the signal of 1s duration as 1 unit, the data of initial 5 unit time are learnt by oneself, calculate the amplitude of the second differnce minimum point of each unit, then using 0.7 times of the median in 5 minimums as detection initial value.

Whenever 1 R ripple being detected, refresh R wave datum buffering, the minimum of this R ripple and its correspondence is pressed into relief area.After 10 R wave-wave peaks being detected, second differnce value corresponding in relief area gets 0.7 times of median as new detection threshold.

When algorithm enters flyback process, detection threshold is reduced to 0.4 times of currency, if R ripple detected, size before being restored to, proceeds to detect.Mainly the impact on difference value is disturbed in order to prevent as examination criteria using median.

Inspection policies is as follows:

If 1 second differnce minimum meets the following conditions, just can think that it corresponds to 1 R ripple: amplitude is less than detection threshold; More than the time of 200ms in the minimum corresponding with previous R ripple; Prove it is not because artefact causes.

After minimum being detected, just can determine the crest location of the R-Wave of ECG Signal of its correspondence.By R crest value testing result, RR interval can be extrapolated easily, judge heart rate situation.

Typical arrhythmia is described below:

Bradycardia: average heart rate is less than 40 beats/min;

Tachycardia: average heart rate is greater than 120 beats/min;

Stop fighting: in 3s, do not occur R ripple;

Leakage is fought: the normal RR-intervals of spacing more than 1.5 times of current R ripple and a upper R ripple.

Developing based on multi-lead radio electrocardiographicmonitoring monitoring terminal is a complicated job, wherein, the signal pre-processing circuit of monitoring terminal extracts the electrocardiosignal of frequency range at 0.05-106Hz by methods such as amplification, filtering, amplifies 1000 times and sends into sample circuit after lifting.Embedded hardware system comprises processor, peripheral circuit, human-computer interaction module and wireless communication module.Embedded software program completes sampling, sends the functions such as electrocardiosignal.

Medical for multi-lead professional cardiac monitoring equipment can be introduced family by smart mobile phone or home computer display terminal by the present invention, and wireless communication technique advantage ensure that the stable high-speed transfer of signal, in addition, and bluetooth or WIFI module power is the highest is no more than 50mW.In the radiation of people's growing interest to the current era of health effect, for large radio transmitted power, there is obvious advantage.In order to improve the cruising time of portable terminal, various ways is adopted to reduce power consumption at software view, as controlled wireless communication module discontinuous.The coordinated operation of whole system fully demonstrates feasibility in electrocardio transmitting procedure and advance, realizes the monitoring of comprehensive multi-lead, reaches medical institutions' cardiac monitoring level.

Portable multi-lead wireless electrocardiograph monitoring Apparatus and method for of the present invention, has following beneficial effect:

(1) the present invention is by electrocardiogram acquisition module acquires multi-lead electrocardiosignal, electrocardiosignal is by wireless communication module (bluetooth or WIFI) and terminal unit (mobile phone A PP, notebook or desktop computer) interconnected, shown and record electrocardiosignal by APP software or notebook software.Achieve people's electrocardiogram (ECG) data history store and emergency situation time ecg information real-time Transmission and subsequently by the issue of attending doctor's doctor's advice information, point-of-care personnel are facilitated to process patient's state of an illness, this Systems Theory achieves the functional requirement that patient's electrocardiogram (ECG) data is monitored at any time, cloud service platform can set up user's large data electrocardio archives, and the Population Health monitoring for patients and healthy population has great strategic significance.

(2) the present invention carries out the display of multi-lead electrocardiogram (ECG) data, storage and playback by wireless communication module (bluetooth mode or WIFI pattern) on terminal unit (mobile phone or computer screen), design collection reaches 18 most and leads, the object reaching the real-time storage to people's multi-lead electrocardiogram (ECG) data, monitoring and initial stage heart disease prevention and diagnose.

(3) the present invention utilizes sensor technology to be combined with embedded technology and wireless communication technique, the components and parts used are few, the components and parts of large volume are not used yet, make the volume of portable multi-lead wireless electrocardiograph monitoring equipment little, be easy to carry, simple to operate, adopt battery powered, show electrocardiogram by mobile phone, data shown on computers simultaneously and by real-time performance information remote transmitting, for vast heart disease adaptation population, there is great positive effect.

(4) portable multi-lead wireless electrocardiograph monitoring equipment of the present invention had not only been applicable to hospital but also had been applicable to family and individual has the function such as bio-signal acquisition and process, signal characteristic abstraction and data transmission, can realize to human ecg signal non-invasive monitoring, have movable operation, easy to use, support long time continuous working, intelligent display diagnostic result, abnormal physiological condition to report to the police and the feature such as wireless data transmission.

(5) portable multi-lead wireless electrocardiograph monitoring equipment of the present invention adopts the design of wireless communication module and communication interface unit (USB communication interface), the transmission of wireless and wired double data can be realized, can also be powered to power module by communication interface unit (USB communication interface), its range of application is very wide.

(6) the present invention adds anti-jamming circuit in hardware designs, software design adds automated wireless linker after going offline, add the rational design of hardware and software of monitoring terminal, in program operation process, radio communication is not substantially by the impact of external interference, the real-time of whole system and stability have good performance, in experimentation, system seldom goes offline, and can re-start from being dynamically connected when signal is good after going offline within the several seconds.

In the description of this description, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present invention or example.In this manual, identical embodiment or example are not necessarily referred to the schematic representation of above-mentioned term.And the specific features of description, structure, material or feature can combine in an appropriate manner in any one or more embodiment or example.

Although illustrate and describe embodiments of the invention above, be understandable that, above-described embodiment is exemplary, can not be interpreted as limitation of the present invention, those of ordinary skill in the art can change above-described embodiment within the scope of the invention when not departing from principle of the present invention and aim, revising, replacing and modification.Scope of the present invention is by claims extremely equivalency.

Claims (9)

1. a portable multi-lead wireless electrocardiograph monitoring equipment, is characterized in that, comprising: electrocardiogram acquisition module, controller, terminal unit;

Described electrocardiogram acquisition module is used for Real-time Collection human ecg signal, described electrocardiogram acquisition module comprises conducting wire, chest crosslinking electrode inhales ball, brothers' folder, described conducting wire is connected with controller by the plug that leads, and inhales ball and brothers respectively press from both sides and be connected by contact with chest crosslinking electrode;

Described controller comprises data processing module, wireless communication module, power module, described controller is for controlling described electrocardiogram acquisition module work situation, receive and process described heart real time signal, control described wireless communication module and the heart real time signal wireless after process is transferred to terminal unit, and carry out power source charges by built-in communication interface unit to power module, carry out Data Over Cable transmission with described terminal unit;

The heart real time signal that described data processing module arrives for receiving electrocardiogram acquisition module acquires, is undertaken amplifying and Filtering Processing by heart real time signal;

Described wireless communication module is used for the heart real time Signal transmissions after by process to described terminal unit;

Described power module is used for powering to electrocardiogram acquisition module, controller;

Described terminal unit receives the heart real time signal data after the process that controller transmitted by wireless communication module or communication interface unit, and stored by built-in memory module, and by the ecg wave form corresponding to the heart real time signal after built-in display screen display process.

2. a kind of portable multi-lead wireless electrocardiograph monitoring equipment as claimed in claim 1, it is characterized in that, described data processing module comprises ARM one-chip computer module, communication interface unit, button and LED display circuit;

Described ARM one-chip computer module is for receiving and processing the heart real time signal that electrocardiogram acquisition module acquires arrives;

Described communication interface unit is used for power source charges and the transmission of the data between controller and terminal unit;

Described button and LED display circuit comprise the power supply indicator being used to indicate power supply status and the wireless connections display lamp being used to indicate radio communication connection status, described power supply indicator is connected with described power module, and described wireless connections display lamp is connected with described wireless communication module.

3. a kind of portable multi-lead wireless electrocardiograph monitoring equipment as claimed in claim 1 or 2, it is characterized in that, described data processing module also comprises anti-jamming circuit, heart real time signal after process is adopted low pass filter process, with the high-frequency signal in the heart real time signal after filtering process by described anti-jamming circuit.

4. a kind of portable multi-lead wireless electrocardiograph monitoring equipment as claimed in claim 1, it is characterized in that, described wireless communication module at least comprises following one: WIFI communication unit, bluetooth-communication unit, 3G/4G communication unit.

5. a kind of portable multi-lead wireless electrocardiograph monitoring equipment as claimed in claim 1, it is characterized in that, the terminal unit of described outside comprises: personal computer or mobile terminal.

6. a kind of portable multi-lead wireless electrocardiograph monitoring equipment as described in any one of claim 2-5, it is characterized in that, described controller also comprises: battery backup system, and described battery backup system is used for by described communication interface unit to described power module charging.

7. a kind of portable multi-lead wireless electrocardiograph monitoring equipment as claimed in claim 1, it is characterized in that, described controller also comprises lead-fail detector testing circuit, described lead-fail detector testing circuit is connected with described conducting wire with described data processing module, for detecting the electrocardiosignal whether received from described conducting wire, if not, judge that described conducting wire comes off, send alarm to described data processing module.

8. a kind of portable multi-lead wireless electrocardiograph monitoring equipment as claimed in claim 7, it is characterized in that, described alarm at least comprises following one: the prompting of auditory tone cues, display lamp, short message prompt.

9. a portable multi-lead wireless electrocardiograph monitoring method, is characterized in that, comprise the steps:

Self-inspection is carried out after described controller energising;

Setting up with terminal unit of described controller communicates, and judges whether conducting wire comes off by the lead-fail detector testing circuit of described controller, if conducting wire comes off, then sends alarm;

Described electrocardiogram acquisition module acquires human body heart real time signal is also transferred to described terminal unit;

Described controller to described electrocardiogram acquisition module acquires to human ecg signal carry out date processing, and by by process after heart real time Signal transmissions to terminal unit;

Heart real time signal after process stores by described terminal unit, by the ecg wave form corresponding to the heart real time signal after built-in display screen display process, if electrocardiogram (ECG) data is abnormal, sends alarm, and is sent by warning message.