CN102488511A - 3G (The 3rd Generation Telecommunication) electro-cardio monitoring system - Google Patents
3G (The 3rd Generation Telecommunication) electro-cardio monitoring system Download PDFInfo
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Abstract
The invention discloses a 3G (The 3rd Generation Telecommunication) electro-cardio monitoring system, which comprises an electro-cardio signal acquisition module, a front amplification circuit, a band-pass filter circuit, a main amplification circuit, a 50Hz trap circuit, a DSP (Digital Signal Processor) micro-processor, an LCD (Liquid Crystal Display) module and a 3G module, wherein real-time acquisition and transmission: medical information of patients, such as electro-cardio, breath, temperature, heart rate and the like, is acquired in real time and transmitted and stored in a database by utilizing a 3G network; real-time monitoring and alarming: electro-cardio data is automatically analyzed and early warned in real time, a reference is provided for preventing and curing, the system actively gives an alarm to nurses and doctors on duty in the event of meeting emergencies, and precious save time is gained for the emergencies; 3G wireless data transmission: continuous monitoring of physical information, such as electro-cardio and the like, for 24 h, is provided for patients, and the patients can move freely; and real-time diagnosis and analysis: medical workers can transfer medical electro-cardio data of the patients in real time and analyze and diagnose states of illnesses with the help of an electronic medical record, and instructions of the doctors can be sent to a monitoring instrument to guide treatment and salvation.
Description
Technical field
The present invention relates to a kind of 3G cardioelectric monitor system, belong to technical field of medical instruments.
Background technology
At present; ECG monitor is the classical conventional instrument that hospital generally uses, and it is safe in utilization, can be in real time, accurately, the variation of the basic electric-physiology parameter of detection of dynamic patient for a long time; And can write down exactly and analyze and Realtime Alerts, for treating and rescue to provide effectively, medical personnel help.
Perfect along with 3G network utilizes it to realize moving health supervision, also will become an important use point.
Summary of the invention
Technical problem to be solved by this invention is that the deficiency to prior art provides a kind of 3G cardioelectric monitor system, adopts following technical scheme:
A kind of 3G cardioelectric monitor system comprises ecg signal acquiring module, pre-amplification circuit, bandwidth-limited circuit, main amplifying circuit, 50Hz trap circuit, DSP microprocessor and LCD display module and 3G module;
Said ecg signal acquiring module comprises electrode and buffering amplifying circuit, driven-right-leg circuit, screen layer drive circuit; Said electrode comprises right breast top electrode, left abdomen bottom electrode and right abdomen bottom electrode, and right breast top electrode and left abdomen bottom electrode are electrocardiosignal sampling electrode, and right abdomen bottom electrode is right lower limb drive electrode; Right breast top electrode and left abdomen bottom electrode connect buffer amplifier circuit respectively, and buffer amplifier circuit is isolated the input electrode signal; Driven-right-leg circuit is used to eliminate the interchange that when electrocardio detects, forms to be disturbed, and reduces the common-mode voltage of human body, improves signal to noise ratio, and electrode links to each other with the amplifier earth terminal through resistance during connection; The screen layer drive circuit is used to the DM EMI signal that suppresses to introduce;
The ecg signal acquiring module is the electrocardiosignal of 10uV-4mV to the pre-amplification circuit output amplitude; Pre-amplification circuit is used for carrying out preposition amplification to the electrocardiosignal of buffer amplifier circuit output, and the gain of pre-amplification circuit is designed to 10 times, is the electrocardiosignal of 100uv-40mV to the bandwidth-limited circuit output amplitude; Bandwidth-limited circuit is used for rejection frequency less than 0.05Hz; Interfering signal greater than 100Hz; The useful component of electrocardiosignal is separated the useful electrocardiosignal in the main amplifying circuit reference frequency output is the 0.05Hz-100Hz scope from the signal that collects; The main amplifying circuit circuit is used for the main gain of electrocardiosignal and amplifies, and gain is designed to 1-100 doubly, is the signal of 10mV-4V to 50Hz notch filter circuit output amplitude; The 50Hz notch filter circuit is used for filtering 50Hz power frequency to be disturbed, and does not have interferential electrocardiosignal to the output of DSP microprocessor; The DSP microprocessor is used to realize A/D data acquisition, digital filtering, simultaneously the LCD display module is shown control, and the 3G module is communicated control; The 3G module is used for being real-time transmitted to hospital's receiving terminal to the electrocardiosignal that collects.
Gather in real time transmission: gather patient's medical information such as electrocardio, breathing, body temperature, heart rate in real time, utilize the 3G network transmission and store the data base into.
Real-time monitoring alarm: heart real time data analysis and early warning, for prevention and treatment provide reference, meet accident and initiatively report to the police to nurse on duty and doctor, win the rescue time of preciousness for accident.
Utilize the 3G wireless data transmission: for patient provides the monitoring of 24 hours physiologic informations such as successive electrocardio, the patient can move freely.
Real-time diagnosis is analyzed: medical personnel can transfer the patient medical electrocardiogram (ECG) data in real time, in conjunction with electronic health record, the state of an illness are made analysis and diagnosis.Doctor's instruction can be sent back to monitor, guiding treatment and relief.
Description of drawings
Fig. 1 is the theory diagram of system of the present invention;
Fig. 2 is a buffer amplifier circuit;
Fig. 3 is a driven-right-leg circuit;
Fig. 4 is the screen layer drive circuit;
Fig. 5 is a bandwidth-limited circuit;
Fig. 6 is the 50Hz trap circuit.
The specific embodiment
Below in conjunction with specific embodiment, the present invention is elaborated.
With reference to figure 1,3G cardioelectric monitor system comprises ecg signal acquiring module, pre-amplification circuit, bandwidth-limited circuit, main amplifying circuit, 50Hz trap circuit, DSP microprocessor and LCD display module and 3G module.
Said ecg signal acquiring module comprises electrode and buffering amplifying circuit, driven-right-leg circuit, screen layer drive circuit.Said electrode comprises right breast top electrode, left abdomen bottom electrode and right abdomen bottom electrode; All adopt the surface to be coated with dismountable disposable soft electrode of AgCl; And on electrode, scribble the high-quality conductive paste; Right breast top electrode and left abdomen bottom electrode are electrocardiosignal sampling electrode, and right abdomen bottom electrode is right lower limb drive electrode.
Right breast top electrode and left abdomen bottom electrode connect buffer amplifier circuit respectively, and buffer amplifier circuit can be isolated the input electrode signal; Driven-right-leg circuit is used to eliminate the interchange that when electrocardio detects, forms to be disturbed, and reduces the common-mode voltage of human body, improves signal to noise ratio, and electrode links to each other with the amplifier earth terminal through resistance during connection; The DM EMI signal that screen layer drive circuit (with driven-right-leg circuit and connect) is used to suppress to introduce (since the incomplete symmetry of components and parts, the distributed constant that circuit board exists).After this three road signal compiles, be the electrocardiosignal of 10uV-4mV to the pre-amplification circuit output amplitude; Pre-amplification circuit is used for carrying out preposition amplification to the electrocardiosignal of buffer amplifier circuit output, and the gain of pre-amplification circuit is designed to 10 times, is the electrocardiosignal of 100uv-40mV to the bandwidth-limited circuit output amplitude; Bandwidth-limited circuit is used for rejection frequency less than 0.05Hz; Interfering signal greater than 100Hz; The useful component of electrocardiosignal is separated the useful electrocardiosignal in the main amplifying circuit reference frequency output is the 0.05Hz-100Hz scope from the signal that collects; The main amplifying circuit circuit is used for the main gain of electrocardiosignal and amplifies, and gain is designed to 1-100 doubly, is the signal of 10mV-4V to 50Hz notch filter circuit output amplitude; The 50Hz notch filter circuit is used for filtering 50Hz power frequency to be disturbed, and does not have interferential electrocardiosignal to the output of DSP microprocessor; The DSP microprocessor is used to realize A/D data acquisition, digital filtering, simultaneously the LCD display module is shown control, and the 3G module is communicated control.The 3G module is used for being real-time transmitted to hospital's receiving terminal to the electrocardiosignal that collects.Hospital's receiving terminal is made up of control and monitor console and information management system.Control and monitor console is based on Visual Basic.net platform construction; Major function is to receive, handle, preserve from mobile unitary data through 3G module and IP binding technology, and will be current shows confession doctor reference with the user's of monitoring center connection physiological data.Information management system mainly is made up of electronic medical record system, mainly comprises functions such as information typing, inquiry and Information Statistics, analysis, provides convenience for the doctor manages patient's data.
The lithium battery power supply module is used to above each module and provides+the 5V regulated power supply.The LCD display module is selected the 320x240 graph lcd module for use, is used in this locality showing in real time the electrocardiosignal that collects.
With reference to figure 2, buffer amplifier circuit is the pith of electrocardiogram acquisition input circuit, is actually an impedance transducer, in circuit, plays buffer action.In order to reduce input noise, in the design, each amplifier has identical common mode rejection ratio (CMRR), and amplifier is selected high precision operating amplifier OPA4277 for use, has ultralow offset voltage 10uA, ultralow imbalance offset voltage ± 0.1uV, and bias current is 1nA to the maximum.The buffer amplifier circuit design is as shown in Figure 3, and the signal that electrocardioelectrode collects among Fig. 3 is received amplifier OPA4277 in-phase end through 100K resistance, and amplifier send next stage to handle signal as voltage follower.
With reference to figure 3, driven-right-leg circuit is because human body picks up the 50Hz alternating voltage under normal conditions through various channels; Will when electrocardio detect, in signal, form to exchange and disturb like this, be everlasting more than several volts; In order to eliminate this interference, adopt driven-right-leg circuit usually.Electrode links to each other with the amplifier earth terminal through resistance during wiring, can reduce the common-mode voltage of human body greatly.It is an essential link during electrocardiosignal is extracted that right lower limb drives, and extracts the common-mode noise that mixes in the original electrocardiographicdigital signal, after amplifying through the one-level paraphase; Turn back to human body again, make their mutual superposition, thereby reduce the absolute value of human body common mode disturbances; Improve signal to noise ratio, it can disturb the power frequency of 50Hz and be reduced to 1% once, and can the 50Hz useful signal in the electrocardiosignal not removed; Compare with the method for right lower limb ground connection, right lower limb Driving technique is better to suppressing to exchange interference effect.
With reference to figure 4, the screen layer drive circuit suppresses because components and parts are not exclusively symmetrical, the distributed constant that circuit board exists, the DM EMI signal of introducing.Adopt the screen layer drive circuit, drive screen layer with common-mode voltage itself and neutralize, so that cross-over connection common mode fluctuation above that is reduced to zero.
Pre-amplification circuit is the whole system key for design; Amplitude is little, frequency is low because the electrocardiosignal of human body has, be subject to disturb, unstable, characteristics such as randomness is strong; Feasible design to the electrocardio amplifying circuit has proposed extremely strict requirement; Especially the selection of amplifier is very important, several aspects such as need move during selective amplifier from gain, frequency response, input impedance, common mode rejection ratio, noise, source and take all factors into consideration.
1. gain
The electrocardiosignal amplitude range is 10Uv-4mV, and the conventional design of ecg amplifier gain requires electrocardio when normal input, and when promptly being input as 1mV, output level reaches about 1V.So the total magnification of ecg amplifier is very high, be chosen as about 1000 times.When circuit design,, further improve common mode rejection ratio, require amplifying circuit should divide multistage realization for suppressing the null offset of circuit.In native system, the gain controlling of signal is accomplished by the amplifier section of pre-amplification circuit, main amplifying circuit, trap circuit jointly.During circuit design, the gain of preamplifier is designed to 10 times, and the main amplifier gain is designed to 1-100 doubly, and the trap amplifier gain is manually adjustable, and the fine setting when being used as the 1mV calibration normally is 4-54 times.
2. frequency response
Because the spectral range of human ecg signal is 0.05Hz-100Hz; So the design ecg amplifier is in this frequency range; In order to reduce unwanted out-of-band noise; Electrocardiosignal is compressed passband with high pass and low pass filter, must design the interferential trap circuit of anti-50Hz power frequency simultaneously, and the electrocardiosignal of waiting until so just has reliable diagnostic and is worth.
3. input impedance
The design of ecg amplifier input impedance depend on the impedance operator of tested human body, employed electrode type and with the contact surface of human body; Ecg amplifier is connected with human body through electrode; Look to the human body direction from amplifier input terminal; Comprise that electrode, conductive paste, skin, tissue fluid have formed genertor impedance to the heart outer wall, this source impedance can be regarded as by resistance string parallel resistor and electric capacity and form.Under the situation of low frequency, this source impedance is a pure resistance.Because the electrocardiosignal source impedance has the characteristic of high impedance, and electrocardiosignal is small and weak signal, therefore, requires the input of ecg amplifier to have high-impedance behavior.Otherwise after the source impedance dividing potential drop, the signal of ecg amplifier input is just fainter, and the signal source overload can occur and make electrocardiosignal produce distortion.
For these reasons, the prestage of ecg signal amplifier all adopts the differential amplifier circuit structure mostly, uses the most generally with being in parallel differential amplifier circuit, three promptly usually said amplifier instrument amplifiers.Native system has adopted the core devices of the instrument amplifier AD620 of AD company as the electrocardiosignal preamplifier.
With reference to figure 5, native system has designed the bandwidth-limited circuit of 0.05-100Hz, and 5-1 is a low pass circuit, and 5-2 is a high pass circuit, with the useful component of electrocardiosignal from collecting to such an extent that separate the signal.
With reference to figure 6, the 50Hz trap circuit adopts improved double T rc active filter, and amplifier is selected the low noise operational amplifier TLC2254 of low-power consumption for use.
The TMS32OF2812 digital signal processor; TM S32 OF 2812 is a 32 fixed point high-speed dsp chips of the up-to-date release of TI company; Adopt 8 grades of instruction pipelines; Monocycle 32x32 bit mac function, maximum speed can be carried out 1.50 hundred million instructions (150MIPS) each second, has guaranteed the rapidity and the real-time of control and signal processing.Also integrated abundant external resource on the IMS32OF2812 sheet in addition; Comprise 16 tunnel 12 ADC; 16 road PWM output, 3 32 general purpose timers, 16 Flash memories of 128k, 18kRAM memory, the peripheral expansion module (PIE) that interrupts can be supported 45 peripheral interruptions, and has McBSP; SPI, interfaces such as the CAN bus of SCI and expansion.TMS32OF2812 also supports the external storage expansion of maximum 1M.TMS32OF2812 supports C/C+ ten programming languages, and the C compile efficiency of its C language optimized device can reach 0%, also has virtual floating-point mathematics function library to provide support, and can shorten the construction cycle of mathematical operation and control sequence greatly.TMS32OF2812 is highly suitable for application rivers such as Electric Machine Control, power supply design, Design of Smart Sensor., at first to gather large-scale engineering machinery when being carried out condition monitoring and fault diagnosis the signal of each pick off.CAN (co ntorlera eranetwork) bus have good reliability, link simple, support advantage [21 such as processed; Therefore we have selected the master/slave distributed metering system based on the CAN bus; And developed intelligent CAN node based on TMS32OF2812; It has the defeated people of 10 tunnel analog quantitys, and 4 road digital quantities are failed the people, not only can carry out data acquisition according to the order of center processing main frame; The functions such as value warning, digital filtering, m conversion of making a noise can also be realized, the computational load of center processing main frame can be alleviated greatly.
The 3G wireless communication module; The LC6311 that native system is selected for use is a TD-SCDMA&GSM (GPRS) dual-mode wireless module; Support that the inter-network automatic seamless switches between TD-SCDMA and gsm system; Under the TD-SCDMA standard, support up-downgoing asymmetric data transmittability, the up-downgoing message transmission rate can reach 384kbps respectively; Support UART and two kinds of communication interfaces of USB, use more conveniently and flexible, can satisfy the demand of different main control devices; Adopt the ultrathin design of 2.9mm assembling height, it can conveniently be applied in smart mobile phone and the Various types of data card, inner integrated H.324 protocol stack makes the function of visual telephone realize more simple; Inner integrated ICP/IP protocol can conveniently connect Internet.
Should be understood that, concerning those of ordinary skills, can improve or conversion, and all these improvement and conversion all should belong to the protection domain of accompanying claims of the present invention according to above-mentioned explanation.
Claims (1)
1. a 3G cardioelectric monitor system is characterized in that, comprises ecg signal acquiring module, pre-amplification circuit, bandwidth-limited circuit, main amplifying circuit, 50Hz trap circuit, DSP microprocessor and LCD display module and 3G module;
Said ecg signal acquiring module comprises electrode and buffering amplifying circuit, driven-right-leg circuit, screen layer drive circuit; Said electrode comprises right breast top electrode, left abdomen bottom electrode and right abdomen bottom electrode, and right breast top electrode and left abdomen bottom electrode are electrocardiosignal sampling electrode, and right abdomen bottom electrode is right lower limb drive electrode; Right breast top electrode and left abdomen bottom electrode connect buffer amplifier circuit respectively, and buffer amplifier circuit is isolated the input electrode signal; Driven-right-leg circuit is used to eliminate the interchange that when electrocardio detects, forms to be disturbed, and reduces the common-mode voltage of human body, improves signal to noise ratio, and electrode links to each other with the amplifier earth terminal through resistance during connection; The screen layer drive circuit is used to the DM EMI signal that suppresses to introduce;
The ecg signal acquiring module is the electrocardiosignal of 10uV-4mV to the pre-amplification circuit output amplitude; Pre-amplification circuit is used for carrying out preposition amplification to the electrocardiosignal of buffer amplifier circuit output, and the gain of pre-amplification circuit is designed to 10 times, is the electrocardiosignal of 100uv-40mV to the bandwidth-limited circuit output amplitude; Bandwidth-limited circuit is used for rejection frequency less than 0.05Hz; Interfering signal greater than 100Hz; The useful component of electrocardiosignal is separated the useful electrocardiosignal in the main amplifying circuit reference frequency output is the 0.05Hz-100Hz scope from the signal that collects; The main amplifying circuit circuit is used for the main gain of electrocardiosignal and amplifies, and gain is designed to 1-100 doubly, is the signal of 10mV-4V to 50Hz notch filter circuit output amplitude; The 50Hz notch filter circuit is used for filtering 50Hz power frequency to be disturbed, and does not have interferential electrocardiosignal to the output of DSP microprocessor; The DSP microprocessor is used to realize A/D data acquisition, digital filtering, simultaneously the LCD display module is shown control, and the 3G module is communicated control; The 3G module is used for being real-time transmitted to hospital's receiving terminal to the electrocardiosignal that collects.
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Cited By (9)
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| CN103120592A (en) * | 2012-11-29 | 2013-05-29 | 中国人民解放军第四军医大学 | Heart sound electronic auscultation and intelligent health analysis system |
| CN103315736A (en) * | 2013-05-27 | 2013-09-25 | 大连民族学院 | Electrocardiograph monitoring system based on personal computer (PC) |
| CN103390100A (en) * | 2013-07-10 | 2013-11-13 | 山东大学齐鲁医院 | 3G wireless communication-based colostomy complication remote diagnosis system |
| CN105125207A (en) * | 2015-09-22 | 2015-12-09 | 吉林大学 | Mobile electrocardiogram monitoring terminal |
| WO2016112514A1 (en) * | 2015-01-15 | 2016-07-21 | 深圳市三木通信技术有限公司 | Method and system for data collection and operation of portable mobile medical terminal |
| CN105982660A (en) * | 2014-12-11 | 2016-10-05 | 邹朝圣 | Electrocardio sensing system |
| CN110141217A (en) * | 2019-06-05 | 2019-08-20 | 南京市江宁医院 | Wireless electrocardiograph |
| CN110251361A (en) * | 2019-06-21 | 2019-09-20 | 安徽工程大学 | A kind of rehabilitation treatment bed |
| CN112568906A (en) * | 2019-09-29 | 2021-03-30 | Oppo广东移动通信有限公司 | Detection circuit, wearable device detection method and wearable device |
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| CN103120592A (en) * | 2012-11-29 | 2013-05-29 | 中国人民解放军第四军医大学 | Heart sound electronic auscultation and intelligent health analysis system |
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| CN110141217A (en) * | 2019-06-05 | 2019-08-20 | 南京市江宁医院 | Wireless electrocardiograph |
| CN110141217B (en) * | 2019-06-05 | 2022-06-07 | 南京市江宁医院 | Wireless electrocardiograph |
| CN110251361A (en) * | 2019-06-21 | 2019-09-20 | 安徽工程大学 | A kind of rehabilitation treatment bed |
| CN112568906A (en) * | 2019-09-29 | 2021-03-30 | Oppo广东移动通信有限公司 | Detection circuit, wearable device detection method and wearable device |
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Application publication date: 20120613 |