CN106562783A - Electrocardio measurement method and device - Google Patents
Electrocardio measurement method and device Download PDFInfo
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- CN106562783A CN106562783A CN201610985835.6A CN201610985835A CN106562783A CN 106562783 A CN106562783 A CN 106562783A CN 201610985835 A CN201610985835 A CN 201610985835A CN 106562783 A CN106562783 A CN 106562783A
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/24—Detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof
- A61B5/316—Modalities, i.e. specific diagnostic methods
- A61B5/318—Heart-related electrical modalities, e.g. electrocardiography [ECG]
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/0002—Remote monitoring of patients using telemetry, e.g. transmission of vital signals via a communication network
- A61B5/0004—Remote monitoring of patients using telemetry, e.g. transmission of vital signals via a communication network characterised by the type of physiological signal transmitted
- A61B5/0006—ECG or EEG signals
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/72—Signal processing specially adapted for physiological signals or for diagnostic purposes
- A61B5/7203—Signal processing specially adapted for physiological signals or for diagnostic purposes for noise prevention, reduction or removal
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/72—Signal processing specially adapted for physiological signals or for diagnostic purposes
- A61B5/7225—Details of analog processing, e.g. isolation amplifier, gain or sensitivity adjustment, filtering, baseline or drift compensation
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Abstract
The invention discloses an electrocardio measurement method and device. The electrocardio measurement method comprises following steps: receiving at least two electrocardio active charge signals sent by at least two electrocardio measurement probes through wireless transmission mode; converting the at least two electrocardio active charge signals into synchronized electrocardio active charge signals; and calculating electrocardio signals of human bodies according to the synchronized electrocardio active charge signals. According to the method and device of the invention, through receiving electrocardio active charge signals sent by electrocardio measurement probes through wireless transmission mode and then performing synchronization process on the signals to obtain real electrocardio signals. There is no need to employ lead wires so that high quality electrocardio signals can be obtained with reduced interference on normal activities for people and without additional mechanical noise and the method and device have high reliability.
Description
Technical field
The present invention relates to medical instruments field, and in particular to a kind of electrocardio measuring method and device.
Background technology
Electrocardiosignal is projection of the cardiac electrophysiology activity in human body surface, and specifically, K, Na, Ga ion is in cardiac pacing
Cell enters or discharges cell membrane different activity cycle, so as to produce potential difference along the different directions of cell, here it is the heart
The origin of electricity.All of Cardiac pacing cell stacks up as power supply little one by one, along specific direction, shows
Periodically potential change, is exactly projection of the electrocardio in body surface different directions.The projection of these different directions is recorded, just
Cardiac electrical change and conductive process can be described.
Existing cardiographic detector device is converted into cardiac electrical ion current by external electrode, such as Ag-AgCl electrodes
Electronic current, so as to be adapted to using current electronic circuit technology measurement, record.In order to preferably record electrocardiosignal, and then
The technologies such as electrocardio in Welson, right leg drive are developed, and strict difinition measurement signal correspondence electrocardio have been put by electrode
In the projection of body surface, so as to constitute " lead " system of electrocardiosignal.It is " conventional 12 using most universal electrocardio measurement lead system
Lead ".As Fig. 1 shows the connected mode of conventional 12 leads of electrocardio measurement.Extremity (left wrist LA, right wrist RA, left lower limb LL, right lower limb
RL electrode) constitutes limb lead, wherein left wrist LA, right wrist RA, left lower limb LL signals are after into cardiographic detector device, by spy
Fixed resistor network constitutes Welson central points, and the electrode signal of all measurements is all cardiac electrical potential in the electrode and Welson
Difference；Accordingly, above-mentioned measurement signal synthesizes right leg drive signal by amplification, shaping etc., is loaded on right lower limb RL, reduces altogether
Impact of the mould signal to measuring；In addition with 6 electrodes positioned at chest, corresponding measurement electrocardiosignal is in directions such as levels
Projection and conduction condition.These above-mentioned measurement signals are collectively formed so-called " conventional 12 leads ".
It is similar with " conventional 12 leads ", the also electrometric lead system of other hearts, but change anyway, employing
The electronic current that the ion current of electrocardiosignal is converted to measuring circuit is constant by Ag-AgCl electrodes.And at least need
Two electrode wires constitute measuring loop.The two electrodes need to be distributed in the corresponding body surface end in heart both sides, need longer
Electrode signal line.Because this reason, " tranquillization " cardiac electrical measuring method is used for the occasion such as kinestate or long-time monitoring,
Just there are many unconformable places.Wherein guard for electrocardio measurement signal require it is relatively low, using " conventional 12 leads " connection
When, the electrode of limb lead uses the end of trunk not in the end of limbs；Measure cardiac electrical under some kinestates
When, using the electrode cable of embedded clothing；Etc..
Fig. 2 shows a kind of scale with electrocardio measurement function.Measurement requirement tested personnel's handss hold handle, light foot
Step down in specific region.Fig. 3 is shown by the cardiac electrical intelligent terminal's occupation mode of shell on the back electrode measurement.Need in measurement process
The specific finger for wanting the both hands of tested personnel holds electrode.
Above-mentioned these schemes on other occasions, can be used for cardiac electrical measurement.But in liberation measurement process
The both hands of measurand, or even limbs, not any improvement.During measurement, the both hands or extremity of tested personnel
It is required for the physical location given according to instrument and equipment to fix, and voluntary movement is unable in measurement process.This is because,
The measuring principle that these measuring principles are all changed using ion current-electronic current, in order to obtain stable measurement electric current, it is necessary to
Using at least two electrode signal lines：If this holding wire can hinder tested personnel using flexible circuit conductor, long wire
Motion；If this signal adopts fixed electrode position, the extremity of tested personnel are also just consolidated by the relative position of fixed electrode
It is fixed.
The content of the invention
The technical problem to be solved in the present invention is that the conducting wire that existing electrocardio measuring apparatus are used easily limits quilt
The normal activity of survey personnel, is not suitable for long-term monitoring measurement, so as to provide a kind of electrocardio measuring method and device.
A kind of one side of the embodiment of the present invention, there is provided electrocardio measuring method, including：Receive the measurement of at least two electrocardios
At least two electrocardio-activity charge signals popped one's head in by wireless transmission method transmission；By at least two electrocardio-activities electric charge
Signal is converted into synchronous electrocardio-activity charge signal；And human body is calculated according to the synchronous electrocardio-activity charge signal
Electrocardiosignal.
Alternatively, at least two electrocardio-activities charge signal is converted into into synchronous electrocardio-activity charge signal bag
Include：Power frequency component is extracted respectively from least two electrocardio-activities charge signal；From at least two electrocardio-activity electricity
A reference signal is selected in lotus signal, in calculating power frequency component in other electrocardio-activity charge signals and the reference signal
Power frequency component time migration；According to the time migration by described other electrocardio-activity charge signals and the reference signal
It is synchronous, obtain the synchronous electrocardio-activity charge signal.
Alternatively, a reference signal is selected from least two electrocardio-activities charge signal, other electrocardios are calculated
The time migration of the power frequency component in the power frequency component in movable charge signal and the reference signal includes：Select power frequency component
The minimum electrocardio-activity charge signal of start-phase as the reference signal；According in other electrocardio-activity charge signals
The phase offset of the power frequency component in power frequency component and the reference signal, is calculated the time migration.
Alternatively, at least two electrocardios work that at least two electrocardio measuring probes are sent by wireless transmission method is being received
Before dynamic charge signal, methods described includes：Send at least two electrocardios measuring probe and start collection signal, wherein,
The collection signal that starts carries out the collection of electrocardio-activity charge signal for controlling at least two electrocardios measuring probe.
Alternatively, at least two electrocardios measuring probe is gathered from the collection signal that starts is received to enabling signal
Time interval less than or equal to power frequency component cycle 1/10th.
Alternatively, the sample rate of at least two electrocardios measuring probe is 10 times of work frequency.
A kind of one side of the embodiment of the present invention, there is provided pressure electrocardio measuring device, including：Receiving unit, for receiving extremely
At least two electrocardio-activity charge signals that few two electrocardio measuring probes are sent by wireless transmission method；Conversion unit, uses
In at least two electrocardio-activities charge signal is converted into into synchronous electrocardio-activity charge signal；And computing unit, use
In the electrocardiosignal that human body is calculated according to the synchronous electrocardio-activity charge signal.
Alternatively, the conversion unit includes：Extraction module, for from least two electrocardio-activities charge signal
Power frequency component is extracted respectively；Computing module, for one to be selected from least two electrocardio-activities charge signal with reference to letter
Number, calculate the time migration of the power frequency component in power frequency component in other electrocardio-activity charge signals and the reference signal；
Synchronization module, for according to the time migration that described other electrocardio-activity charge signals are synchronous with the reference signal, obtains
To the synchronous electrocardio-activity charge signal.
Alternatively, the computing module includes：Submodule is selected, for the heart for selecting the start-phase of power frequency component minimum
Electrical activity charge signal is used as the reference signal；Calculating sub module, for the work in other electrocardio-activity charge signals
The phase offset of the power frequency component in frequency signal and the reference signal, is calculated the time migration.
Alternatively, also include：Transmitting element, for sending at least two electrocardios measuring probe collection letter is started
Number, wherein, the collection signal that starts carries out electrocardio-activity charge signal for controlling at least two electrocardios measuring probe
Collection.
According to embodiments of the present invention, by receiving the electrocardio-activity electricity that electrocardio measuring probe is sent by wireless transmission method
Lotus signal, then these signals synchronize process, to be calculated real electrocardiosignal, without the need for adopting conducting wire, therefore
High-quality electrocardiosignal can be obtained while reducing and mankind's normal activity is disturbed, and not produce extra machinery and be made an uproar
Sound, reliability are high.
Description of the drawings
By the more detailed description to embodiment of the present invention mode in accompanying drawing, above-mentioned and other purposes, the spy of the present invention
The advantage of seeking peace will be apparent from, wherein, identical reference number typically represents the phase in illustrated embodiments of the invention mode
Same part.
Fig. 1 shows the electrocardio measurement connection figure of conventional 12 leads；
Fig. 2 shows a kind of scale with electrocardio measurement function；
Fig. 3 is shown by the cardiac electrical intelligent terminal's occupation mode of shell on the back electrode measurement；
Fig. 4 shows a kind of measurable cardiac electrical intelligent spire lamella principle；
Fig. 5 shows a kind of schematic diagram of electrocardio measuring probe of the embodiment of the present invention；
Fig. 6 shows a kind of structural representation of electric charge induction detector of the embodiment of the present invention；
Fig. 7 shows a kind of schematic diagram of amplifying circuit of the embodiment of the present invention
Fig. 8 shows the schematic diagram of another kind of electrocardio measuring probe of the embodiment of the present invention；
Fig. 9 shows a kind of schematic diagram of electrocardio measuring system of the embodiment of the present invention；
Figure 10 shows a kind of flow chart of electrocardio measuring method of the embodiment of the present invention；
Figure 11 shows the electrometric Hz noise model of the heart；
Figure 12 shows a kind of schematic diagram of pressure electrocardio measuring device of the embodiment of the present invention；
Figure 13 shows a kind of schematic diagram of example left finesse signal of the embodiment of the present invention；
Figure 14 has shown out a kind of schematic diagram of example left finesse signal of the embodiment of the present invention；
Figure 15 is shown and the schematic diagram for obtaining "false" electrocardiosignal is directly processed using measurement signal；
Figure 16 shows a power frequency component extracted using the embodiment of the present invention；
Figure 17 shows the electrocardiosignal recovered after power frequency component synchronization.
Specific embodiment
The preferred embodiment of the present invention is described more fully with reference to the accompanying drawings, shows that the present invention's is excellent in the accompanying drawings
Select embodiment.However, the present invention may be realized in various forms and should not be construed and limited by embodiments set forth here.
Conversely, thesing embodiments are provided so that the present invention is more thorough and complete, also, convey the scope of the invention to completely
Those skilled in the art.
Before the embodiment of the present invention is introduced, a kind of the equivalent of electrocardio measuring electrode ion current-electronic current is first introduced
Model, as shown in figure 4, in order to measure electrocardiosignal, except the conversion regime of ion current-electronic current, can also be using electricity
Lotus sensor direct measurement particular body portion, such as acral ionic charge signal.The survey of acral optional position
The corresponding ionic charge signal of amount electrocardio does not rely on the measurement of other optional positions, so as to possess removal electrocardio measurement lead
The primary condition of line.
Based on above-mentioned primary condition, the electrocardio measuring method of the embodiment of the present invention provide a kind of electrocardio measuring probe and
Electrocardio measuring system, but the electrocardio measuring method of present example is not limited in the electrocardio measuring probe and electrocardio measurement system
Use on system, a kind of optional electrocardio measuring probe and system are only provided here.
As shown in figure 5, the electrocardio measuring probe includes：Electric charge induction detector 10, for detecting corresponding human body
Electrocardio-activity charge signal；Signal processor 20, is connected with electric charge induction detector 10, for by electrocardio-activity charge signal
It is processed into digital signal；Wireless transceiver 30, for digital signal to be sent to electrocardio processing terminal by wireless transmission method,
Wherein, electrocardio processing terminal is according to the signal generation human ecg signal for receiving；Microcontroller 40, with signal processor 20 and
Wireless transceiver 30 connects respectively, digital signal is sent to electrocardio by wireless transmission method for controlling wireless transceiver 30
Processing terminal.
In the electrocardio measuring probe using the embodiment of the present invention, the side of electric charge induction detector 10 can be attached to
Body measurements, for example, wrist, ankle etc..Each electrocardio measuring probe is used to measure the electrocardio-activity electric charge of corresponding position
Signal, specifically, has electric charge induction detector 10 to carry out signals collecting, then passes the electrocardio-activity charge signal for collecting
Transporting to signal processor 20 carries out signal processing, for example amplification, filtering, analog-to-digital conversion etc..Signal processor 20 is by after process
Signal is sent to microcontroller 40, is controlled wireless transceiver 30 by microcontroller 40 and is sent the signal to electrocardio processing terminal, is used
In generation electrocardiosignal.
In the embodiment of the present invention, electrocardio measuring probe carries out data biography with electrocardio processing terminal by wireless transmission method
It is defeated, without the need for adopting conducting wire, therefore high-quality electrocardiosignal can be obtained while reducing and mankind's normal activity is disturbed,
And it is high not produce extra mechanical noise, reliability.
It should be noted that the wireless transceiver of the embodiment of the present invention can carry antenna, it would however also be possible to employ external antenna,
Wireless signal after to launch coding.
Alternatively, above-mentioned signal processor 20 includes：Amplifying circuit, for being amplified place to electrocardio-activity charge signal
Reason；Filter, for being amplified process to electrocardio-activity charge signal；Analog-digital converter, for electrocardio-activity electric charge to be believed
Number it is converted into digital signal.
Wherein, signal is amplified and Filtering Processing is to improve the quality of the signal for collecting, it is ensured that electrocardio is surveyed
The reliability of amount.Because the signal for collecting is usually analogue signal, analogue signal is converted into by numeral by analog-digital converter
Signal, is capable of identify that in order to microcontroller and processes.
It should be noted that in above-described embodiment, electrocardio-activity charge signal is sent to before electrocardio processing terminal,
In the every processing procedure carried out to electrocardio-activity charge signal, the signal after process can still react the letter of electrocardio-activity
Number.
Alternatively, as shown in fig. 6, electric charge induction detector 10 includes：Metal plate, is connected with amplifying circuit；Screen layer,
Cover on metal plate, for shielding skin surface beyond electric charge.The metal plate good for design shielding, when a spacing
From it is interior there is electric charge when, the electric charge on metal plate surface can be redistributed, so as to realize the detection of electric charge.
Alternatively, as shown in fig. 7, amplifying circuit includes：Operational amplifier, input in the same direction is connected with metal plate, together
When be also grounded by resistance R3, reverse input end is connected by resistance R2 with outfan, is also grounded by electric capacity C1.In order to have
Preferably charge detection sensitivity, using high input impedance, the instrumentation amplifier of high-amplification-factor, i.e. operational amplifier.Correspondence
The structure of Fig. 7, the measurement of human body electrocardio electric charge, wherein, resistance R3 may be up to 10G ohms.Alternatively, electrocardio measuring probe
It is arranged on wrist strap or watch.Wrist strap can be worn in wrist, it is also possible to be worn on ankle.The electrocardio for realizing body surface is lived
Move corresponding charge detection, use two or more, such as two wrists and two ankles, the synchronization of charge signal
Measurement, it is possible to carry out measuring for electrocardiosignal.
In order to improve the portability of electrocardio measuring probe, as shown in figure 8, the electrocardio measuring probe of the present embodiment also includes：
Battery 50, for powering to electric charge induction detector 10, signal processor 20, wireless transceiver 30 and microcontroller 40.
In order to realize removing the purpose of conducting wire, can be by the electrocardio-activity charge signal digitized for collecting, by nothing
Line transmission means is the charge measurement signals of two wrists, or even two ankles and more multipoint charge measurement signals, with
Digitized form is dealt on receiver, receiver or is placed on the body of tested personnel, or is placed on and is closed apart from patient
Reason communication distance is somewhere, then can just remove the on line between charge measurement probe.
The another aspect of the embodiment of the present invention, additionally provides a kind of electrocardio measuring system, as shown in figure 9, the electrocardio measurement
System includes：At least two electrocardio measuring probe 100, for detecting the electrocardio-activity charge signal of corresponding human body；
Electrocardio processing terminal 200, with least two electrocardio measuring probes 100 by being wirelessly connected, for according at least two electrocardios
The electrocardio-activity charge signal that measuring probe 100 is detected generates human ecg signal.
Further, electrocardio processing terminal similarly includes：Wireless transceiver and microcontroller, wherein, wireless transceiver
For receiving the electrocardio-activity charge signal of electrocardio measuring probe transmission；Microcontroller is connected with wireless transceiver, for basis
The electrocardio-activity charge signal that wireless transceiver is received generates human ecg signal.
Alternatively, in order to ensure the portability of electrocardio measuring system, electrocardio processing terminal also includes：Battery, for centripetal
The wireless transceiver and microcontroller of electrical measuring systems is powered.
A kind of electrocardio measuring method that the embodiment of the present invention is provided, can be used for the electrocardio measuring system without lead, mainly
Performed by electrocardio processing terminal, specifically, as shown in Figure 10, the method includes：
Step S101, is received at least two electrocardio measuring probes and is lived by least two electrocardios that wireless transmission method sends
Dynamic charge signal.
Electrocardio-activity charge signal is collected by electrocardio measuring probe, wherein, each electrocardio measuring probe is gathered
To an electrocardio-activity charge signal, electrocardio processing terminal is sent to by wireless transmission method.
At least two electrocardio-activity charge signals are converted into synchronous electrocardio-activity charge signal by step S102.
It is asynchronous between the electrocardio-activity charge signal collected due to each electrocardio measuring probe, therefore, electrocardio process is eventually
Termination is received after multiple electrocardio-activity charge signals, and these electrocardio-activity charge signals are synchronized into process, is converted into same
The electrocardio-activity charge signal of step, in order to obtain electrocardiosignal.
In the electrocardio measuring system without lead, the signal digitized of electrocardio measuring probe collection depends on local clock
System, in other words, is sent to the charge signal of the corresponding parts of body of electrocardio-activity without conducting wire electrocardio processing terminal
It is nonsynchronous, these digitized signals directly process just nonsensical, cannot get corresponding electrocardiosignal.
Step S103, according to synchronous electrocardio-activity charge signal the electrocardiosignal of human body is calculated.
For synchronous electrocardio-activity charge signal, the electrocardiosignal of human body is calculated using modes such as subtraction process.
According to embodiments of the present invention, by receiving the electrocardio-activity electricity that electrocardio measuring probe is sent by wireless transmission method
Lotus signal, then these signals synchronize process, to be calculated real electrocardiosignal, without the need for adopting conducting wire, therefore
High-quality electrocardiosignal can be obtained while reducing and mankind's normal activity is disturbed, and not produce extra machinery and be made an uproar
Sound, reliability are high.
In order that the electrocardio processing terminal of the embodiment of the present invention obtains synchronous electrocardio-activity charge signal, can be using very
Multimode.Such as：
1), the clock of electrocardio measuring probe digitized conversion adopts wireless mode synchronization, rather than using local crystal oscillator.
This mode can cause the radio communication power consumption of electrocardio measuring probe, electrocardio processing terminal to increase, and shorten running hours
Between, even result in time of measuring and do not reach basic requirement, or being accomplished by measured personnel carries more jumbo battery；Survey
The circuit auxiliary circuit of amount probe is more aided in, and at least needs the synchronised clock of KHz levels；In finite interval, it is impossible to by being permitted
But two or more personnel measure, or require more complicated system simultaneously；
2), the clock of electrocardio measuring probe digitized conversion is solved by the way of wireless synchronisation and phase-locked local ring.
The wireless synchronization clock signal of electrocardio processing terminal need not always exist in measurement process, however it is necessary that certain hour is long
Degree, the high-precision locking synchronization clock of clock for changing local digital.This scheme is compared with 1), reduces radio communication
Require and power consumption, it is also possible to solved by way of timesharing in finite interval, the interference problem of multiple personnel's measurements, but
The digitized clock of charge measurement probe can be extremely complex.
There is Hz noise (being also power line interference) in view of the normal environment residing for popular feeling electrical measurement activity.Figure 11
Show the electrometric Hz noise model of the heart, exist in the electrocardiosignal of measurement 50Hz (China etc.) or 60Hz (U.S.,
Japan etc.) signal.For same environment, same human body, same time period measurement, the power frequency of body surface diverse location is believed
Number frequency has the concordance of height.Power frequency component in by isolating electric charge electrocardio-activity charge signal, it is possible to achieve most
The synchronization of the electrocardio-activity charge signal of low cost.
For this purpose, in a kind of optional embodiment, above-mentioned steps S102 turn at least two electrocardio-activity charge signals
Turning to synchronous electrocardio-activity charge signal includes：Power frequency component is extracted respectively from least two electrocardio-activity charge signals；
A reference signal is selected from least two electrocardio-activity charge signals, the power frequency in other electrocardio-activity charge signals is calculated
The time migration of the power frequency component in signal and reference signal；According to time migration is by other electrocardio-activity charge signals and refers to
Signal synchronization, obtains synchronous electrocardio-activity charge signal.
Based on the concordance of power frequency component, in the present embodiment, after electrocardio-activity charge signal is received, therefrom extract
Go out power frequency component, to synchronize to electrocardio-activity charge signal using the time migration between power frequency component, its power consumption is more
It is low, it is therefore not necessary to increase hardware cost.
Further, a reference signal is selected from least two electrocardio-activity charge signals, other electrocardios is calculated and is lived
The time migration of the power frequency component in the power frequency component in dynamic charge signal and reference signal includes：Select the starting of power frequency component
The minimum electrocardio-activity charge signal of phase place is used as reference signal；Power frequency component in other electrocardio-activity charge signals with
The phase offset of the power frequency component in reference signal, is calculated time migration.
When being synchronized using power frequency component, it is preferred to use the minimum electrocardio-activity electric charge of power frequency component initial phase is made
For reference signal, in this, as synchronous benchmark, can be according to the phase offset of power frequency component, when obtaining actual collection
Between offset, and then realize the synchronization of signal.
Alternatively, in the present embodiment, before step S101, method includes：Send at least two electrocardio measuring probes
Start collection signal, wherein, starting collection signal at least two electrocardio measuring probes of control carries out electrocardio-activity electric charge letter
Number collection.
The triggering of electrocardio measuring probe is triggered by electrocardio processing terminal, specifically, using broadcast mode to all of electricity
Lotus measuring terminals send startup collection signal；Electrocardio measuring probe is according to the startup collection signal enabling measurement for receiving and adopts
Collection, for more preferable synchronizing signal, it is desirable to which electrocardio measuring probe is measured the time of collection from broadcast singal is received to startup
Every control within the 1/10 of power frequency component cycle, such as 50Hz power, its 1/10th be 2ms, this is for current
Microprocessor system be easily done.Electrocardio measuring probe starts measurement collection and sends out the measurement result after digitized
Give electrocardio processing terminal.Electrocardio measuring probe will be with very high quantified precision, such as 21～24 bits, and this is for physiology
For signal, this kind of analog-digital converter application is commonplace, and power consumption is very low.
Electrocardio processing terminal therefrom extracts power frequency component according to the signal of each electrocardio measuring probe for receiving, and intends
Close out power frequency component.In order to preferably realize this data processing, the signal sampling rate of electrocardio measuring probe is in work frequency
10 times, that is, 500Hz or more than.This is also the rational index of comparison for current physiological signal analog-digital converter.
According to the power frequency component for extracting, the signal of arbitrary electrocardio measuring probe collection can be selected as reference, be calculated
The deviation of other charge detection terminal signaling power frequency components, what this deviateed reflection is exactly asynchronous between each road signal.Choosing
The minimum charge detection terminal of start-phase is selected as reference, so the signal of other charge detection terminals, can be according to power frequency
The phase offset of signal, obtains actual acquisition time skew.Using the moment point of reference charge detecting terminal, to other electric charges
The data of detecting terminal carry out interpolation processing, obtain the multichannel charge measurement signals of " synchronization ".
On this basis, it is possible to obtain real signal.So far, leading between electrocardio measuring probe is not only eliminated
On line, and synchro measure is realized, such that it is able to go out electrocardiosignal using the data recovery of each charge measurement terminal.
The embodiment of the present invention additionally provides a kind of pressure electrocardio measuring device, and the device can be used for performing the embodiment of the present invention
Electrocardio measuring method, can specifically have above-mentioned center electric treatment terminal to realize, as shown in figure 12, the device includes：Receive single
Unit 121, conversion unit 122 and computing unit 123.
Receiving unit 121 is used to receive at least two electrocardio measuring probes are sent by wireless transmission method at least two
Electrocardio-activity charge signal.
Electrocardio-activity charge signal is collected by electrocardio measuring probe, wherein, each electrocardio measuring probe is gathered
To an electrocardio-activity charge signal, receiving unit 121 is sent to by wireless transmission method.
Conversion unit 122 is used to at least two electrocardio-activity charge signals to be converted into synchronous electrocardio-activity electric charge letter
Number.
It is asynchronous between the electrocardio-activity charge signal collected due to each electrocardio measuring probe, therefore, conversion unit 122
After multiple electrocardio-activity charge signals are received, these electrocardio-activity charge signals are synchronized into process, be converted into same
The electrocardio-activity charge signal of step, in order to obtain electrocardiosignal.
In the electrocardio measuring system without lead, the signal digitized of electrocardio measuring probe collection depends on local clock
System, in other words, is sent to the charge signal of the corresponding parts of body of electrocardio-activity without conducting wire electrocardio processing terminal
It is nonsynchronous, these digitized signals directly process just nonsensical, cannot get corresponding electrocardiosignal.
Computing unit 123 is used to calculate the electrocardiosignal of human body according to synchronous electrocardio-activity charge signal.
For synchronous electrocardio-activity charge signal, the electrocardiosignal of human body is calculated using modes such as subtraction process.
According to embodiments of the present invention, by receiving the electrocardio-activity electricity that electrocardio measuring probe is sent by wireless transmission method
Lotus signal, then these signals synchronize process, to be calculated real electrocardiosignal, without the need for adopting conducting wire, therefore
High-quality electrocardiosignal can be obtained while reducing and mankind's normal activity is disturbed, and not produce extra machinery and be made an uproar
Sound, reliability are high.
In a kind of optional embodiment, above-mentioned conversion unit includes：Extraction module, for living from least two electrocardios
Extract power frequency component in dynamic charge signal respectively；Computing module, for selecting one from least two electrocardio-activity charge signals
Individual reference signal, the time for calculating power frequency component in power frequency component in other electrocardio-activity charge signals and reference signal is inclined
Move；Synchronization module, for according to time migration that other electrocardio-activity charge signals are synchronous with reference signal, obtains the synchronous heart
Electrical activity charge signal.
Based on the concordance of power frequency component, in the present embodiment, after electrocardio-activity charge signal is received, therefrom extract
Go out power frequency component, to synchronize to electrocardio-activity charge signal using the time migration between power frequency component, its power consumption is more
It is low, it is therefore not necessary to increase hardware cost.
Further, computing module includes：Submodule is selected, for the electrocardio for selecting the start-phase of power frequency component minimum
Movable charge signal is used as reference signal；Calculating sub module, for the power frequency component in other electrocardio-activity charge signals
With the phase offset of the power frequency component in reference signal, time migration is calculated.
When being synchronized using power frequency component, it is preferred to use the minimum electrocardio-activity electric charge of power frequency component initial phase is made
For reference signal, in this, as synchronous benchmark, can be according to the phase offset of power frequency component, when obtaining actual collection
Between offset, and then realize the synchronization of signal.
Alternatively, in the present embodiment, device also includes：Transmitting element, for sending at least two electrocardio measuring probes
Start collection signal, wherein, starting collection signal at least two electrocardio measuring probes of control carries out electrocardio-activity electric charge letter
Number collection.
The triggering of electrocardio measuring probe is triggered by transmitting element, specifically, is surveyed to all of electric charge using broadcast mode
Amount terminal sends startup collection signal；Electrocardio measuring probe is according to the startup collection signal enabling measurement for receiving and gathers, and is
More preferable synchronizing signal, it is desirable to which electrocardio measuring probe is from receiving broadcast singal to the time interval controls for starting measurement collection
Within the 1/10 of power frequency component cycle, such as 50Hz power, its 1/10th be 2ms, this is for current micro- place
Reason device system is easily done.Electrocardio measuring probe starts measurement collection and the measurement result after digitized is sent to into the heart
Electric treatment terminal.Electrocardio measuring probe will be with very high quantified precision, such as 21～24 bits, and this comes for physiological signal
Say, this kind of analog-digital converter application is commonplace, and power consumption is very low.
Electrocardio processing terminal therefrom extracts power frequency component according to the signal of each electrocardio measuring probe for receiving, and intends
Close out power frequency component.In order to preferably realize this data processing, the signal sampling rate of electrocardio measuring probe is in work frequency
10 times, that is, 500Hz or more than.This is also the rational index of comparison for current physiological signal analog-digital converter.
By taking two electrocardio measuring probes as an example, Figure 13 to Figure 17 to show and recover electrocardiosignal using the method for the present invention
Process.Figure 13 shows a left finesse signal using charge measurement terminal of the present invention.Figure 14 show an employing this
The right finesse signal of bright charge measurement terminal.Figure 15 is shown directly to be processed using charge measurement terminal measurement signal and obtains "false"
Electrocardiosignal.By this process, it will be seen that cannot get significant electrocardiosignal during different measurement.Figure 16
Show a power frequency component extracted using charge measurement terminal signaling of the present invention.Figure 17 is shown through power frequency component synchronization
The electrocardiosignal recovered afterwards.
By the change present invention, belong within the spirit and principles in the present invention, any modification for being made, equivalent are replaced
Change, improve, should be included within the scope of the present invention.
Claims (10)
1. a kind of electrocardio measuring method, it is characterised in that include：
Receive at least two electrocardio-activity charge signals that at least two electrocardio measuring probes are sent by wireless transmission method；
At least two electrocardio-activities charge signal is converted into into synchronous electrocardio-activity charge signal；And
The electrocardiosignal of human body is calculated according to the synchronous electrocardio-activity charge signal.
2. electrocardio measuring method according to claim 1, it is characterised in that by least two electrocardio-activities electric charge letter
Number being converted into synchronous electrocardio-activity charge signal includes：
Power frequency component is extracted respectively from least two electrocardio-activities charge signal；
A reference signal is selected from least two electrocardio-activities charge signal, other electrocardio-activity charge signals are calculated
In power frequency component and the reference signal in power frequency component time migration；
It is according to the time migration that described other electrocardio-activity charge signals are synchronous with the reference signal, obtain the synchronization
Electrocardio-activity charge signal.
3. electrocardio measuring method according to claim 2, it is characterised in that from least two electrocardio-activities electric charge letter
A reference signal is selected in number, the work in power frequency component in other electrocardio-activity charge signals and the reference signal is calculated
The time migration of frequency signal includes：
The minimum electrocardio-activity charge signal of the start-phase of power frequency component is selected as the reference signal；
The phase offset of the power frequency component in the power frequency component in other electrocardio-activity charge signals and the reference signal,
It is calculated the time migration.
4. the electrocardio measuring method according to any one of claims 1 to 3, it is characterised in that receiving at least two electrocardios
Before at least two electrocardio-activity charge signals that measuring probe is sent by wireless transmission method, methods described includes：
Send at least two electrocardios measuring probe and start collection signal, wherein, the collection signal that starts is used to control
At least two electrocardios measuring probe carries out the collection of electrocardio-activity charge signal.
5. electrocardio measuring method according to claim 4, it is characterised in that at least two electrocardios measuring probe is from connecing
Receive described startup and gather 1/10th of the cycle that signal is less than or equal to power frequency component to the time interval that enabling signal is gathered.
6. electrocardio measuring method according to claim 4, it is characterised in that at least two electrocardios measuring probe is adopted
Sample rate is 10 times of work frequency.
7. a kind of pressure electrocardio measuring device, it is characterised in that include：
Receiving unit, is lived for receiving at least two electrocardio measuring probes by least two electrocardios that wireless transmission method sends
Dynamic charge signal；
Conversion unit, at least two electrocardio-activities charge signal to be converted into into synchronous electrocardio-activity charge signal；
And
Computing unit, for calculating the electrocardiosignal of human body according to the synchronous electrocardio-activity charge signal.
8. pressure electrocardio measuring device according to claim 7, it is characterised in that the conversion unit includes：
Extraction module, for extracting power frequency component respectively from least two electrocardio-activities charge signal；
Computing module, for selecting a reference signal from least two electrocardio-activities charge signal, calculates other hearts
The time migration of the power frequency component in the power frequency component in electrical activity charge signal and the reference signal；
Synchronization module, for according to the time migration that described other electrocardio-activity charge signals are same with the reference signal
Step, obtains the synchronous electrocardio-activity charge signal.
9. pressure electrocardio measuring device according to claim 8, it is characterised in that the computing module includes：
Submodule is selected, the electrocardio-activity charge signal for selecting the start-phase of power frequency component minimum is believed as the reference
Number；
Calculating sub module, for the power frequency in the power frequency component in other electrocardio-activity charge signals and the reference signal
The phase offset of signal, is calculated the time migration.
10. the pressure electrocardio measuring device according to any one of claim 7 to 9, it is characterised in that also include：
Transmitting element, for sending at least two electrocardios measuring probe collection signal is started, wherein, it is described to start collection
Signal carries out the collection of electrocardio-activity charge signal for controlling at least two electrocardios measuring probe.
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