CN105030230A - Electrocardiosignal collector and electrocardiogram processing system and method - Google Patents
Electrocardiosignal collector and electrocardiogram processing system and method Download PDFInfo
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Abstract
The invention discloses an electrocardiosignal collector which comprises an electrocardiographic lead, a voltage conversion device, an electrocardio collection chip, an audio frequency modulating unit and an audio frequency interface. The electrocardiographic lead is connected with the electrocardio collection chip. Electrocardio signals are detected to be input into the electrocardio collection chip. The electrocardio collection chip conducts analog front end amplification on the input electrocardio signals, low-frequency simulation signals are formed to be output to the audio frequency modulating unit. The audio frequency modulating unit conducts high-frequency modulating on the low-frequency simulation signals and outputs the low-frequency simulation signals. An electrocardiosignal collector is connected with the audio frequency input end of an external device through the audio frequency interface. The voltage conversion device is connected with the audio frequency interface, and voltage is generated according to input of the external device to supply power to the electrocardiosignal collector. The audio frequency modulating unit is connected with the audio frequency interface to output the modulated electrocardio simulation signals to the external device. According to the electrocardiosignal collector, the audio part of an intelligent terminal is fully utilized, collection and transmission of electrocardiosignals are completed, the hardware complexity of the collector is minimized, and the cost of the collector is lowered effectively.
Description
Technical field
The present invention relates to ECG signal acquisition and processing field, particularly relate to a kind of Electrocardial signal acquisition device, electrocardiogram processing system and processing method thereof.
Background technology
Electrocardiogram as a kind of noinvasive and simple detection method, plays an important role in the early screening of cardiac disorder.In recent years, along with the development of the Internet health approach, emerge many microminiature ecg signal acquiring analytical systems towards individual, family.But these systems terminal used all needs independently-powered terminal, and all need independently MCU or AD sampling module to realize gathering, realize data transmission by bluetooth, USB or other data communication methods and intelligent mobile terminal (as smart mobile phone, panel computer etc.) afterwards.At present, for the domestic art solutions of this technology, the innovative point proposed is distributed in the aspect such as mobile terminal integrated design, miniaturized design, thin design, wearable design, networking design of electrocardiogram acquisition substantially, and the cost of acquisition terminal is reduced, the aspect such as ease for use, seldom effective prioritization scheme is proposed.
Summary of the invention
According to an aspect of the present invention, provide a kind of Electrocardial signal acquisition device, this Electrocardial signal acquisition device comprises: cardiac diagnosis lead, voltage conversion device, electrocardiogram acquisition chip, voice modulation unit and audio interface, described cardiac diagnosis lead connects described electrocardiogram acquisition chip, detect electrocardiosignal and input described electrocardiogram acquisition chip, the described electrocardiosignal of described electrocardiogram acquisition chip to input carries out AFE (analog front end) amplification, form low-frequency analog signal and export described voice modulation unit to, described voice modulation unit exports after carrying out high frequency modulated to described low-frequency analog signal, wherein, Electrocardial signal acquisition device connects the audio input end of external equipment by described audio interface, described voltage conversion device connects described audio interface, according to the input formation voltage of external equipment, for Electrocardial signal acquisition device is powered, described voice modulation unit connects described audio interface, export the ECG simulator signal after modulation to described external equipment.
Electrocardial signal acquisition device of the present invention is connected with the audio input end of external equipment by arranging audio interface, realize the transmission of electrocardiosignal and utilize audio interface to power, fully multiplexing AD Acquisition Circuit, the power supply circuits of external equipment audio-frequency unit, achieve the Electrocardial signal acquisition device minimizing hardware complexity, effectively reduce the hardware cost of harvester.
In some embodiments, described voice modulation unit is pulse-modulator, comprise clock unit and Port Multiplier, described Port Multiplier connects described clock unit and described electrocardiogram acquisition chip, return pulse signal and described low-frequency analog signal carry out hybrid modulation, export the ECG simulator signal after modulation.Thus, can realize carrying out voice modulation by clock pulses to electrocardiosignal, electrocardiosignal is modulated on sound carrier, to be carried out the AD sampling of ECG simulator signal by audio input end (earphone MIC holds), make Electrocardial signal acquisition device can the audio-frequency unit of multiplexing external equipment and electrocardiogram processing system, only in ECG Acquisition Device, carry out AFE (analog front end) collection and analog-modulated, thus reduce power consumption and the hardware cost (not needing to arrange MCU or AD acquisition module) of ECG Acquisition Device.
In some embodiments, described voltage conversion device is dc-dc, described external equipment be input as the DC offset voltage that described audio input end exports described audio interface to, described dc-dc connects the MIC end of described audio interface, according to DC offset voltage formation voltage, for described Electrocardial signal acquisition device is powered; Or described voltage conversion device is rectifier transformer, described external equipment be input as the audible communication signal of telecommunication that described audio input end exports described audio interface to, described rectifier transformer connects the left or right sound channel of described audio interface, according to ac signal formation voltage, for described Electrocardial signal acquisition device is powered.Thus, the bias voltage by earphone or audio voltage output formation voltage can be realized, Electrocardial signal acquisition device is powered, Electrocardial signal acquisition device is powered without the need to independent current source, reduce hardware cost.
According to an aspect of the present invention, additionally provide a kind of electrocardiogram processing system, this system comprises Electrocardial signal acquisition device and intelligent terminal, described Electrocardial signal acquisition device comprises cardiac diagnosis lead, voltage conversion device, electrocardiogram acquisition chip, voice modulation unit and audio interface, described cardiac diagnosis lead connects described electrocardiogram acquisition chip, the electrocardiosignal of detection is inputted described electrocardiogram acquisition chip and carry out front end analogue amplification, output low frequency analogue signal is to described voice modulation unit, and described voice modulation unit carries out high frequency modulated to described low-frequency analog signal;
Described intelligent terminal comprises audio input end and ECG's data compression module, described Electrocardial signal acquisition device accesses the audio input end of described intelligent terminal by described audio interface, export the ECG simulator signal after modulation to described audio input end, described audio input end carries out AD sampling to the ECG simulator signal after the described modulation received, generate audio signal and export described ECG's data compression module to, described ECG's data compression module installation is for gathering described audio signal, carry out signal processing, and output display electro-cardiologic signal waveforms; Wherein,
Described voltage conversion device connects described audio interface, according to the output formation voltage of described audio input end, for described Electrocardial signal acquisition device is powered.
System of the present invention utilizes intelligent terminal to power for Electrocardial signal acquisition device, utilizes the ECG's data compression platform of intelligent terminal to carry out Treatment Analysis to electrocardiosignal simultaneously, exports electrocardiographic wave, for medical reference.Meanwhile, the highly standardized and modularity of the audio frequency input/output terminal of intelligent terminal, makes this system have well compatible and extensibility.
In some embodiments, described voltage conversion device is dc-dc, described dc-dc connects the MIC end of described audio interface, the DC offset voltage of described audio input end output is received by the MIC termination of described audio interface, according to described DC offset voltage formation voltage, for described Electrocardial signal acquisition device is powered.Thus, the DC offset voltage exported by the earphone portion of intelligent terminal, just can be powered for Electrocardial signal acquisition device, very convenient and practical.
In some embodiments, described voltage conversion device is rectifier transformer, described ECG's data compression module comprises voice playing unit, described voice playing unit is set to detect described audio input end, catch the headset plugging state of described audio input end, according to the insertion of earphone or the audio signal of dial-out state plays or stopping broadcasting characteristic frequency; Described rectifier transformer connects the left or right sound channel of described audio interface, is received the audio signal of the characteristic frequency of described broadcasting by the left or right sound channel of described audio interface, according to described audio signal formation voltage, for described Electrocardial signal acquisition device is powered.Thus, the connection status being detected ECG Acquisition Device by intelligent terminal can be realized, and broadcasting sine wave is powered to Electrocardial signal acquisition device.
In some embodiments, described ECG's data compression module also comprises signal gathering unit, data demodulation unit and signal filtering unit, described signal gathering unit is set to the buffer area arranging one piece of fixed size, by the sound-recording function of the described intelligent terminal voice signal from described audio signal sample fixed frequency, and the voice signal of the described fixed frequency collected is stored to described buffer area; Described data demodulation unit is set to the data reading described buffer area, carries out 1/8th samplings, and carries out the extraction of maximum data to sampled data, thus obtain electrocardiosignal to described data; Described signal filtering unit is set to carry out 100Hz low-pass filtering and the filtering of 50Hz power frequency successively, by filtered electro-cardiologic signal waveforms output display to the electrocardiosignal that described data demodulation unit is extracted.Thus, the collection to the electrocardiosignal transferring to intelligent terminal can be realized, separate mediation Filtering Processing, thus obtain satisfactory electrocardiosignal, export the electrocardiographic wave without filtering interference, for user's medical treatment reference.
According to an aspect of the present invention, additionally provide a kind of ECG treatment method, to realize collection to electrocardiographic wave, process and analysis.The method comprises:
Electrocardial signal acquisition device connects the audio input end of intelligent terminal by audio interface, receive described audio input end input and to described intelligent terminal's transmission of data signals;
Voltage conversion device according to the input formation voltage of described audio input end, for Electrocardial signal acquisition device is powered;
Electrocardiogram acquisition chip receives the electrocardiosignal that cardiac diagnosis lead detects, carry out front end analogue amplification to the electrocardiosignal of described detection, output low frequency ECG simulator signal is to voice modulation unit;
Described low frequency ECG simulator signal and clock pulses ripple are carried out hybrid modulation by voice modulation unit, export the ECG simulator signal after modulation to described audio input end;
Described audio input end receives the ECG simulator signal after described modulation, carries out AD sampling, generates audio signal.
Pass through the method, ECG Acquisition Device can be realized and intelligent terminal carries out the transmission of electrocardiogram (ECG) data by analogue signal, enable the sample circuit of the multiplexing intelligent terminal's audio-frequency unit of ECG Acquisition Device, thus make ECG Acquisition Device not need MCU or A/D module can realize object of sampling, reduce hardware complexity and the cost of ECG Acquisition Device.Meanwhile, utilize the power supply circuits part of intelligent terminal's audio-frequency unit, also make ECG Acquisition Device without the need to independent current source, thus realize ECG Acquisition Device hardware and minimize.
In some embodiments, the method also comprises:
Described intelligent terminal gathers the voice signal of fixed frequency from the audio signal of described generation, and is stored in the buffer area of setting by the voice signal of the described fixed frequency collected;
Read the data of described buffer area, 1/8th samplings are carried out to described data, and the extraction of maximum data is carried out to sampled data, obtain electrocardiosignal sequence;
100Hz low-pass filtering and the filtering of 50Hz power frequency are carried out successively, by filtered electro-cardiologic signal waveforms output display to described electrocardiosignal sequence.Thus, the collection to the electrocardiosignal being transferred to intelligent terminal, modulation and Filtering Processing can be realized, to obtain the electrocardiographic wave without filtering interference.
In some embodiments, described voltage conversion device is dc-dc or rectifier transformer, and described voltage conversion device comprises according to the input formation voltage of described audio input end:
Described dc-dc connects the MIC end of described audio interface, and the DC offset voltage exported by the audio input end of described intelligent terminal, is produced voltage, power to described Electrocardial signal acquisition device; Or
Described rectifier transformer connects the left or right sound channel of described audio interface, described intelligent terminal detects the headset plugging state of described audio input end, when detecting that earphone inserts, play the voice signal of special audio, described rectifier transformer is according to the ac signal playing special audio generation, formation voltage, powers to described Electrocardial signal acquisition device.Thus, can realize being powered to ECG Acquisition Device by the audio-frequency unit of multiplexing intelligent terminal, make ECG Acquisition Device without the need to independent current source, reduce hardware complexity and the cost of ECG Acquisition Device.
By the method, the audio input end namely by intelligent terminal provides power supply for Electrocardial signal acquisition device, realizes the collection to electrocardiosignal.Simultaneously, by electrocardiosignal is carried out hybrid modulation, make electrocardiosignal can be inputted the earphone MIC passage of intelligent terminal by sound carrier, by intelligent terminal, audio signal analyzed, demodulation, the process such as filtering, obtain the electrocardiographic wave after processing, for user.Multiplexing by intelligent terminal's audio-frequency unit, effectively reduce cost and the power consumption of Electrocardial signal acquisition device, be convenient to expansion and exploitation that people carry out intelligent terminal's ECG's data compression platform as required, the hardware achieving ECG Signal Sampling System minimizes and compatibility.
Accompanying drawing explanation
Fig. 1 is the structural representation of the Electrocardial signal acquisition device of an embodiment of the present invention;
Fig. 2 is the structural representation of the Electrocardial signal acquisition device of another embodiment of the present invention;
Fig. 3 is the frame structure schematic diagram of the electrocardiogram processing system of one embodiment of the present invention;
Fig. 4 is the schematic flow sheet of the ECG treatment method of one embodiment of the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is further detailed explanation.
Fig. 1 show schematically show the Electrocardial signal acquisition device according to one embodiment of the present invention.As shown in Figure 1, this device comprises cardiac diagnosis lead 100, electrocardiogram acquisition chip 101, voice modulation unit 102, voltage conversion device 103 and audio interface 104.Wherein, voice modulation unit 102 can be realized by clock pulses device, and its structure comprises clock unit 1021 and Port Multiplier 1020.Voltage conversion device 103 connects audio interface 104, and connected the external equipment with audio input end (earphone jack as smart mobile phone) by audio interface 104, output voltage is that electrocardiogram acquisition chip 101 and voice modulation unit 102 are powered.Cardiac diagnosis lead 100 connects electrocardiogram acquisition chip 101, electrocardiogram acquisition chip 101 connects Port Multiplier 1020, input low frequency simulation electrocardiosignal, Port Multiplier 1020 connects clock unit 1021, receive clock impulse wave, low frequency is simulated electrocardiosignal and clock pulses ripple carries out hybrid modulation, export audio interface 104 to.As shown in Figure 1, audio interface 104 standard four sections of headset plugs of adopting international standards.According to international standard, standard four sections of headset plugs comprise MIC Mike 1040, GND earth terminal 1041, R channel R1042 and L channel L1043.Voltage conversion device 103 adopts low-voltage dc-dc (as LSF0108), the MIC Mike 1040 of audio interface 104 is connected by dc-dc, the DC offset voltage that the audio input end receiving external equipment by MIC Mike 1040 exports, carry out voltage transitions, the voltage producing 2V is that electrocardiogram acquisition chip 101 and voice modulation unit 102 are powered.The voltage exported by the power supply circuits (prior art) of audio input end due to external equipment belongs to light current pressure (i.e. low-voltage), electrocardiogram acquisition chip 101 needs the analog circuit chip adopting low consumption low voltage, preferred AD8232, AFE (analog front end) amplification is carried out to the electrocardiosignal that cardiac diagnosis lead 100 detects, forms the analog signal output of low frequency to Port Multiplier 1020.Clock unit 1021 adopts clock circuit, produces the impulse wave of 2KHz, inputs to Port Multiplier 1020.Port Multiplier 1020 is by impulse wave and low-frequency analog signal mixing, complete high frequency modulated (by ECG simulator signal madulation on sound carrier), form the ECG simulator signal after modulation, exported to the audio input end of external equipment by the MIC Mike 1040 of audio interface 104, the audio sample that external equipment is carried by its audio input end can carry out AD sampling to the ECG simulator signal after the modulation of input, obtains the audio signal after sampling.
Fig. 2 show schematically show the Electrocardial signal acquisition device of another embodiment of the present invention.As shown in Figure 2, in this embodiment, voltage conversion device 103 adopts rectifier transformer, voltage conversion device 103 connects the R channel R1042 (or L channel L1043) of audio interface 104, the AC audio signal of telecommunication being received external equipment audio input end by the R channel R1042 (or L channel L1043) of audio interface 104 converts voltage to, and the voltage producing 2V is that electrocardiogram acquisition chip 101 and voice modulation unit 102 are powered.The ECG simulator signal formed after modulation is exported to the audio input end of external equipment by voice modulation unit 102 by MIC Mike 1040, external equipment can complete the AD sampling of ECG simulator signal by the audio sample that its audio input end carries.The difference of the embodiment in the embodiment in Fig. 1 embodiment and Fig. 2 embodiment, is only the difference of power supply mode.The embodiment of Fig. 1, voltage conversion device 103 selects dc-dc, and the DC offset voltage of the input of holding by utilizing the MIC of audio interface 104, for Electrocardial signal acquisition device is powered.The embodiment of Fig. 2, voltage conversion device 103 selects rectifier transformer, by the AC audio signal of telecommunication utilizing the right side (left side) sound channel of audio interface 104 to input, for Electrocardial signal acquisition device is powered.In the embodiment shown in figure 2, external equipment needs to comprise audio playing unit, and audio playing unit, by detecting the insertion of the earphone of the audio input end of external equipment or extracting state, carries out the broadcasting of specific alternating current audio frequency or stops playing.Be specially, when detecting that earphone inserts, play the sine wave of 20KHz to pass through the left and right acoustic channels of the left and right acoustic channels output AC signal of telecommunication to audio interface 104, rectifier transformer receives ac signal by the left or right sound channel of audio interface 104, produce the voltage of 2V, for Electrocardial signal acquisition device is powered.
It should be noted that, in the scope that voice modulation unit of the present invention mainly can be sampled to the audio-frequency unit of intelligent terminal in order to the low frequency ECG simulator signal madulation after being amplified front end, (the audio-frequency unit sample range that intelligent terminal carries is generally 20Hz-44.1KHz, low frequency ECG simulator signal after the amplification of front end is generally 0.05Hz-100Hz), to avoid the loss of electrocardiosignal, so voice modulation unit can be any modulation circuit or device that can realize this object, carrier frequency range of choices is 1KHz-20KHz.The pulse-modulator of the preferred 2K of the present embodiment carries out signal madulation.Electrocardiogram acquisition chip of the present invention can be any analog circuit chip with low consumption low voltage, and embodiments of the invention preferably have the AD8232 of good biological signal processing performance.
The Electrocardial signal acquisition device of the present invention's design is by utilizing the audio interface (audio frequency input, output) of external equipment, realize the power supply of harvester and the sampling of electrocardiosignal, make use of existing signal sampling hardware in external equipment (as intelligent terminal) (i.e. AD sample circuit, the power supply circuits of audio-frequency unit) to greatest extent, achieve minimizing of Electrocardial signal acquisition device hardware complexity, thus for user provides one can at the miniature Electrocardial signal acquisition device of the upper plug and play of audio interface (as earphone jack).Electrocardial signal acquisition device provided by the invention, to be connected with the intelligent terminal with audio input end by audio interface and to obtain supply voltage and carry out data transmission, without the need to independently-powered, (transmission of analogue signal can be carried out by audio interface without the need to extra MCU or A/D module, AD sampling is carried out by the audio input end of intelligent terminal), effectively reduce the hardware cost of harvester.And by multiplexing highly standardized and modular intelligent terminal's head circuit (i.e. audio-frequency unit), harvester of the present invention has good compatibility.
Fig. 3 show schematically show the electrocardiogram processing system of one embodiment of the present invention.As shown in Figure 3, this system comprises Electrocardial signal acquisition device 30 and intelligent terminal 31.Wherein, Electrocardial signal acquisition device 30 is the Electrocardial signal acquisition device shown in Fig. 1 or Fig. 2, and intelligent terminal 31 comprises earphone jack audio input end 311 and ECG's data compression module 310.According to system of the present invention, Electrocardial signal acquisition device 30 inserts the earphone jack audio input end 311 of intelligent terminal 31 by its audio interface 104, Electrocardial signal acquisition device 30 is connected with intelligent terminal 31, utilizes the audio-frequency unit of intelligent terminal 31 (handset module as smart mobile phone) power for Electrocardial signal acquisition device 30 and carry out AD sampling.The mode being Electrocardial signal acquisition device 30 power supply by the earphone jack audio input end 311 of intelligent terminal 31 comprises by earphone DC offset voltage and the audible communication signal of telecommunication, and specific implementation describes above, does not repeat them here.After Electrocardial signal acquisition device 30 connects intelligent terminal 31 energising, detecting electrocardiosignal by cardiac diagnosis lead 100 inputs to after electrocardiogram acquisition chip 101 carries out front end analogue processing and amplifying, the ECG simulator signal (by low frequency ECG simulator signal madulation on sound carrier) after modulation is formed after carrying out hybrid modulation by voice modulation unit 102, exported by the MIC Mike 1040 of audio interface 104, intelligent terminal 31 carries out AD sampling by the MIC Mike of its earphone jack audio input end 311, thus obtain the audio signal after sampling (AD sampling utilizes the existing AD sampling module of intelligent terminal's audio-frequency unit).Afterwards, intelligent terminal 31 is gathered by ECG's data compression module 310 audio signal generated, separates mediation Filtering Processing.
As shown in Figure 3, ECG's data compression module 310 comprises signal gathering unit 3103, data demodulation unit 3102 and signal filtering unit 3101.Signal gathering unit 3103 is set to the buffer area arranging one piece of fixed size in the memory space of intelligent terminal 31, (the AD standard for manual sampling frequency of consideration intelligent terminal is 44.1KHz to gather fixed frequency the audio signal obtained from sampling, different according to the standard frequency that intelligent terminal AD samples, also can be that other frequencies are as 22.1KHz) voice signal, and the voice signal of the fixed frequency collected (the preferred 44.1KHz of the present embodiment) is stored to buffer area.Data demodulation unit 3102 is set to the data reading buffer area, / 8th samplings are carried out to the data of buffer area, and the extraction of maximum data is carried out to the data after sampling, thus obtain data sequence, this data sequence is the electrocardiosignal that Electrocardial signal acquisition device 30 gathers.Signal filtering unit 3101 is set to carry out 100Hz low-pass filtering and the filtering of 50Hz power frequency successively to the data sequence obtained after demodulation (i.e. electrocardiosignal), with filtering high-frequency interferencing signal and power frequency interference signals, and by filtered electro-cardiologic signal waveforms figure output display.
As shown in Figure 3, ECG's data compression module 310 can also be set to comprise voice playing unit 3104, and the ECG's data compression module 310 comprising voice playing unit 3104 is applicable to the Electrocardial signal acquisition device 30 (Electrocardial signal acquisition device namely in the embodiment shown in corresponding diagram 2) being carried out voltage transitions by rectifier transformer.Voice playing unit 3104 is set to the earphone jack audio input end 311 detecting intelligent terminal 31, catch the headset plugging state of audio input end 311, when the insertion of earphone being detected, (to the function that the voice high-frequency signal opening intelligent terminal's player exports this functional module acquiescence close, by calling the existing power function of this module, pass ginseng according to the procedure stipulation of intelligent terminal can open, specifically can refer to the related software description of intelligent terminal.), playing fixed frequency voice signal as the sine wave of 20KHz, when detecting that earphone is transferred to, stopping playing voice signal.ECG Acquisition Device 30 connects the earphone jack audio input end 31 of intelligent terminal 31 by audio interface, and sound channel obtains the audible communication signal of telecommunication from the left or right, is changed by rectifier transformer, and the voltage producing 2V is that Electrocardial signal acquisition device 30 is powered.MIC for the audio input end by intelligent terminal carries out the technical scheme (Electrocardial signal acquisition device namely corresponding embodiment illustrated in fig. 1) that DC offset voltage is powered, ECG's data compression module 310 does not need to comprise voice playing unit 3104, the DC offset voltage that Electrocardial signal acquisition device 30 is exported by the MIC of audio input end carries out DC conversion, just can produce supply voltage.
In actual applications, Electrocardial signal acquisition device 30 connects the earphone jack audio input end 311 of intelligent terminal 31 by audio interface, obtains supply voltage and carries out ECG simulator Signal transmissions.User detects electrocardiosignal by the cardiac diagnosis lead of Electrocardial signal acquisition device 30, after the electrocardiosignal detected is carried out AFE (analog front end) amplification by electrocardiogram acquisition chip AD8232, input low frequency ECG simulator signal is to the Port Multiplier of voice modulation unit, the clock pulses of receive clock circuit while of Port Multiplier, high frequency modulated is carried out to the ECG simulator of input, and by the earphone jack audio input end of the ECG simulator signal after modulation by the MIC end input intelligent terminal of audio interface.The ECG simulator signal of AD sampling (i.e. MIC module) to input that the earphone jack audio input end of intelligent terminal is carried by it carries out AD sampling, forms audio signal.Signal gathering unit 3103 is by calling the sound-recording function of intelligent terminal, from audio signal, gather fixed frequency is that the voice signal of 44.1KHz puts into buffering, data demodulation unit 3102 pairs of buffered datas are sampled and maximum is extracted, thus realize the demodulation of the audio signal to input, obtain electrocardiosignal.Electrocardiosignal after the 3101 pairs of demodulation of signal filtering unit carries out Filtering Processing, thus obtain separating the filtered electrocardiosignal of mediation, the electro-cardiologic signal waveforms figure that just Electrocardial signal acquisition device 30 can be gathered afterwards carries out output display by the display screen of intelligent terminal 31.
It should be noted that intelligent terminal 31 can be any smart machine with MIC earphone, as mobile phone, panel computer, PC etc.The system of this invention, by the earphone MIC output offset voltage of intelligent terminal or to play fixed-audio output AC signal of telecommunication formation voltage by left and right acoustic channels be that Electrocardial signal acquisition device is powered, make use of the upper existing signals collecting hardware of intelligent terminal (i.e. the earphone power supply circuits of audio-frequency unit and AD sample circuit) to greatest extent, make not need in ECG Acquisition Device independently to arrange power supply circuits, and the transmission of ECG simulator signal is carried out by audio input end, make not need in Electrocardial signal acquisition device to arrange MCU or AD part, thus achieve the minimal hardware design of ECG Acquisition Device, reduce the hardware cost of ECG Acquisition Device.Further, due to the head circuit highly standardized and modularity (the present invention utilizes international four segment standard) of intelligent terminal, ECG Acquisition Device of the present invention can the intelligent terminal of all band MIC earphones on compatible market easily.Native system is by the APP (i.e. ECG's data compression module) of the upper exploitation of intelligent terminal, realize the audio frequency solution mediation Filtering Processing of electrocardiosignal, dissection process for electrocardiosignal provides interface and platform, ECG Acquisition Device is made only to need to carry out analog acquisition front end and analog-modulated process, reduce the power consumption (within 0.5mW) of ECG Acquisition Device greatly, by collection, the solution mediation Filtering Processing of intelligent terminal, just can demonstrate the electrocardiographic wave of needs, improve ease for use, for user bring convenient.
Fig. 4 show schematically show the ECG treatment method of one embodiment of the present invention, and as shown in Figure 4, the method comprises:
Step S401: Electrocardial signal acquisition device receives DC offset voltage or the input of the audible communication signal of telecommunication of intelligent terminal, generates 2V voltage, for electrocardiogram acquisition chip and voice modulation unit are powered.
Electrocardial signal acquisition device connects the earphone jack audio input end of intelligent terminal by audio interface, receive by dc-dc (as LSF0108) DC offset voltage that earphone MIC holds or by rectifier transformer audio reception ac signal, produce the voltage of 2V and the electrocardiogram acquisition chip AD8232 of Electrocardial signal acquisition device and voice modulation unit are powered.
Wherein, by the realization of rectifier transformer audio reception ac signal, need the headset plugging state being detected intelligent terminal's earphone jack audio input end by the APP on intelligent terminal and ECG's data compression module, if earphone insert state detected, then play the voice signal (sine wave as 20KHz) of fixed frequency, for rectifier transformer provides the audible communication signal of telecommunication to input, realize the power supply to Electrocardial signal acquisition device.If detect that earphone is dial-out state, then stop playing voice signal.
Step S402: Electrocardial signal acquisition device detects electrocardiosignal by cardiac diagnosis lead, inputs to electrocardiogram acquisition chip and carries out front end analogue processing and amplifying.
Cardiac diagnosis lead access electrocardiogram acquisition chip, as AD8232, detects electrocardiosignal input electrocardiogram acquisition chip AD8232 by sensor and carries out front end analogue processing and amplifying.It should be noted that, the chip that electrocardiogram acquisition chip also can select other many propagated sensations to enter, thus realize the multi-lead (i.e. accessible two or more electrode) of harvester.But selected electrocardiogram acquisition chip needs to be the analog voltage chip of low consumption low voltage, thus meets the requirement of the light current characteristic that audio-frequency unit is powered.
Step S403: the low-frequency analog signal after voice modulation unit receives the process of electrocardiogram acquisition chip carries out hybrid modulation, and exports intelligent terminal to.
Voice modulation unit preferred pulse manipulator, structure can comprise clock circuit and Port Multiplier, be embodied as Port Multiplier receive clock circuit input 2KHz clock pulses ripple and the process of electrocardiogram acquisition chip after low frequency simulation electrocardiosignal, impulse wave and low frequency simulation electrocardiosignal are mixed, by ECG simulator signal madulation on sound carrier, imported into the earphone MIC passage of intelligent terminal by the MIC end of audio interface, thus realize the collection (that is to say recording) of audio signal.
Step S404: the ECG simulator signal of intelligent terminal to input carries out AD sampling, obtains audio signal.
Intelligent terminal carries out AD sampling by the MIC part of its audio input end to the ECG simulator signal after the modulation of input, obtains audio digital signals.
Step S405: the voice signal gathering fixed frequency from the audio signal obtained, and be stored to buffer area.
ECG's data compression module obtains the buffer area of a fixed size from the memory area of intelligent terminal, and from the audio signal obtained, frequency acquisition is the voice signal of 44.1KHz, stored in buffer area.
Step S406: the data reading buffer area, carries out audio frequency demodulation, extracts electrocardiosignal.
ECG's data compression module reads the data in buffering, / 8th samplings are carried out to the buffered data read, and the extraction of maximum data is carried out to sampled data, obtain the data sequence extracted, this data sequence is electrocardiosignal, thus realizes the demodulation to the audio signal collected.
Step S407: Filtering Processing is carried out, output display electro-cardiologic signal waveforms to the electrocardiosignal extracted.
Electrocardiosignal after demodulation is carried out Filtering Processing by ECG's data compression module, comprises and first carries out 100Hz low-pass filtering, with filtering high-frequency interferencing signal, then the filtering of 50Hz power frequency is carried out, with filtering Hz noise, thus obtain filtered electrocardiosignal, by electro-cardiologic signal waveforms output display.
In Electrocardial signal acquisition device provided by the invention and electrocardiogram processing system and method, harvester is without the need to independently-powered, simultaneously, harvester end only needs analog acquisition front end and analog modulation circuit, concrete ECG signal treatment and analysis completes intelligent terminal, greatly reduces hardware cost and power consumption.And, complete power supply and transfer function by the earphone jack audio-frequency unit making full use of intelligent terminal simultaneously, Electrocardial signal acquisition device does not need can realize the communication with intelligent terminal by extra means of communication, Electrocardiographic process and output is carried out by the electrocardio processing platform system of intelligent terminal, the International standardization of audio-frequency unit, what make the harvester of multiplexed audio partial function and intelligent terminal has better compatibility alternately.
Above-described is only some embodiments of the present invention.For the person of ordinary skill of the art, without departing from the concept of the premise of the invention, can also make some distortion and improvement, these all belong to protection scope of the present invention.
Claims (10)
1. Electrocardial signal acquisition device, comprise: cardiac diagnosis lead, voltage conversion device, electrocardiogram acquisition chip, voice modulation unit and audio interface, described cardiac diagnosis lead connects described electrocardiogram acquisition chip, detect electrocardiosignal and input described electrocardiogram acquisition chip, the described electrocardiosignal of described electrocardiogram acquisition chip to input carries out AFE (analog front end) amplification, form low-frequency analog signal and export described voice modulation unit to, described voice modulation unit exports after carrying out high frequency modulated to described low-frequency analog signal, wherein
Electrocardial signal acquisition device connects the audio input end of external equipment by described audio interface, described voltage conversion device connects described audio interface, according to the input formation voltage of external equipment, for Electrocardial signal acquisition device is powered, described voice modulation unit connects described audio interface, exports the ECG simulator signal after modulation to described external equipment.
2. harvester according to claim 1, it is characterized in that, described voice modulation unit is pulse-modulator, comprise clock unit and Port Multiplier, described Port Multiplier connects described clock unit and described electrocardiogram acquisition chip, return pulse signal and described low-frequency analog signal carry out hybrid modulation, export the ECG simulator signal after modulation.
3. harvester according to claim 1, it is characterized in that, described voltage conversion device is dc-dc, described external equipment be input as the DC offset voltage that described audio input end exports described audio interface to, described dc-dc connects the MIC end of described audio interface, according to DC offset voltage formation voltage, for described Electrocardial signal acquisition device is powered; Or
Described voltage conversion device is rectifier transformer, described external equipment be input as the audible communication signal of telecommunication that described audio input end exports described audio interface to, described rectifier transformer connects the left or right sound channel of described audio interface, according to ac signal formation voltage, for described Electrocardial signal acquisition device is powered.
4. electrocardiogram processing system, comprise Electrocardial signal acquisition device and intelligent terminal, described Electrocardial signal acquisition device comprises cardiac diagnosis lead, voltage conversion device, electrocardiogram acquisition chip, voice modulation unit and audio interface, described cardiac diagnosis lead connects described electrocardiogram acquisition chip, the electrocardiosignal of detection is inputted described electrocardiogram acquisition chip and carry out front end analogue amplification, output low frequency analogue signal is to described voice modulation unit, and described voice modulation unit carries out high frequency modulated to described low-frequency analog signal;
Described intelligent terminal comprises audio input end and ECG's data compression module, described Electrocardial signal acquisition device accesses the audio input end of described intelligent terminal by described audio interface, export the ECG simulator signal after modulation to described audio input end, described audio input end carries out AD sampling to the ECG simulator signal after the described modulation received, generate audio signal and export described ECG's data compression module to, described ECG's data compression module installation is for gathering described audio signal, carry out signal processing, and output display electro-cardiologic signal waveforms; Wherein,
Described voltage conversion device connects described audio interface, according to the output formation voltage of described audio input end, for described Electrocardial signal acquisition device is powered.
5. system according to claim 4, wherein, described voltage conversion device is dc-dc, described dc-dc connects the MIC end of described audio interface, the DC offset voltage of described audio input end output is received by the MIC termination of described audio interface, according to described DC offset voltage formation voltage, for described Electrocardial signal acquisition device is powered.
6. system according to claim 4, wherein, described voltage conversion device is rectifier transformer, described ECG's data compression module comprises voice playing unit, described voice playing unit is set to detect described audio input end, catch the headset plugging state of described audio input end, according to the insertion of earphone or the audio signal of dial-out state plays or stopping broadcasting characteristic frequency;
Described rectifier transformer connects the left or right sound channel of described audio interface, is received the audio signal of the characteristic frequency of described broadcasting by the left or right sound channel of described audio interface, according to described audio signal formation voltage, for described Electrocardial signal acquisition device is powered.
7. the system according to claim 4 or 5 or 6, wherein, described ECG's data compression module also comprises signal gathering unit, data demodulation unit and signal filtering unit,
Described signal gathering unit is set to the buffer area arranging one piece of fixed size, by the sound-recording function of the described intelligent terminal voice signal from described audio signal sample fixed frequency, and the voice signal of the described fixed frequency collected is stored to described buffer area;
Described data demodulation unit is set to the data reading described buffer area, carries out 1/8th samplings, and carries out the extraction of maximum data to sampled data, thus obtain electrocardiosignal to described data;
Described signal filtering unit is set to carry out 100Hz low-pass filtering and the filtering of 50Hz power frequency successively, by filtered electro-cardiologic signal waveforms output display to the electrocardiosignal that described data demodulation unit is extracted.
8. ECG treatment method, comprising:
Electrocardial signal acquisition device connects the audio input end of intelligent terminal by audio interface, receive described audio input end input and to described intelligent terminal's transmission of data signals;
Voltage conversion device according to the input formation voltage of described audio input end, for Electrocardial signal acquisition device is powered;
Electrocardiogram acquisition chip receives the electrocardiosignal that cardiac diagnosis lead detects, carry out front end analogue amplification to the electrocardiosignal of described detection, output low frequency ECG simulator signal is to voice modulation unit;
Described low frequency ECG simulator signal and clock pulses ripple are carried out hybrid modulation by voice modulation unit, export the ECG simulator signal after modulation to described audio input end;
Described audio input end receives the ECG simulator signal after described modulation, carries out AD sampling, generates audio signal.
9. method according to claim 8, also comprises:
Described intelligent terminal gathers the voice signal of fixed frequency from the audio signal of described generation, and is stored in the buffer area of setting by the voice signal of the described fixed frequency collected;
Read the data of described buffer area, 1/8th samplings are carried out to described data, and the extraction of maximum data is carried out to sampled data, obtain electrocardiosignal sequence;
100Hz low-pass filtering and the filtering of 50Hz power frequency are carried out successively, by filtered electro-cardiologic signal waveforms output display to described electrocardiosignal sequence.
10. method according to claim 8, wherein, described voltage conversion device is dc-dc or rectifier transformer, and described voltage conversion device comprises according to the input formation voltage of described audio input end:
Described dc-dc connects the MIC end of described audio interface, and the DC offset voltage exported by the audio input end of described intelligent terminal, is produced voltage, power to described Electrocardial signal acquisition device; Or
Described rectifier transformer connects the left or right sound channel of described audio interface, described intelligent terminal detects the headset plugging state of described audio input end, when detecting that earphone inserts, play the voice signal of special audio, described rectifier transformer is according to the ac signal playing special audio generation, formation voltage, powers to described Electrocardial signal acquisition device.
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