CN109381180A - Detectable bio-impedance and cardiac electrical wearable device, measuring system and method - Google Patents
Detectable bio-impedance and cardiac electrical wearable device, measuring system and method Download PDFInfo
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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
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- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/05—Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves
- A61B5/053—Measuring electrical impedance or conductance of a portion of the body
- A61B5/0537—Measuring body composition by impedance, e.g. tissue hydration or fat content
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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
- A61B5/48—Other medical applications
- A61B5/4869—Determining body composition
- A61B5/4872—Body fat
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- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
- A61B5/6801—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be attached to or worn on the body surface
- A61B5/6802—Sensor mounted on worn items
- A61B5/681—Wristwatch-type devices
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
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- 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
- A61B5/7235—Details of waveform analysis
- A61B5/725—Details of waveform analysis using specific filters therefor, e.g. Kalman or adaptive filters
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Abstract
The present invention discloses a kind of detectable bio-impedance and cardiac electrical wearable device, measuring system and method, the wearable device includes: shell, watchband and four electrode slices for detecting bio-impedance and ecg information, the watchband is connect with shell, two electrode slices of four electrode slices are set to the shell front, other two electrode slice is set to the back side of the shell.The present invention can be realized simultaneously the measurement function of bio-impedance and electrocardiosignal, measure bio-impedance using four electrode method, then shares three electrodes therein on this four electrodes and complete electrocardio measurement, optimize device structure, reduce equipment volume, reduces cost, while guaranteeing measurement accuracy.
Description
Technical field
The present invention relates to intelligent wearable device technical field more particularly to a kind of detectable bio-impedance and cardiac electrical wear
Wear equipment, measuring system and method.
Background technique
Obesity is set to one of ten big chronic diseases by the World Health Organization.Fat and hypertension, hyperlipidemia, hyperglycemia are simultaneously known as
" dead quartet ", is likely to become the number one killer of 21 century.Because of the diabetes of overweight and fat initiation, hypertension, angiocarpy
The diseases such as disease increase year by year and in rejuvenation trend.Continue overweight people for a long time, diabetes morbidity significantly improves.
Preventing and treating cardiovascular disease work in China's has obtained first-stage success, but still faces a severe challenge.On the whole, Chinese painstaking effort
Pipe disease illness rate and the death rate are still in ascent stage.
In view of above-mentioned fat and cardiovascular disease seriousness, find and carry out preventing and controlling to become especially as early as possible
It is important.
Currently, the main stream approach for obtaining human body component is exactly the bio-impedance by detecting human body, then pass through bio-impedance
Correlometer formula be calculated.Human body component mainly includes the information such as fat, muscle, moisture, protein.Wherein, fat percentage
It is an important indicator for judging body fat.And the electrocardiogram that electrocardiosignal is drawn has in the detection process of cardiovascular disease
There is irreplaceable role, it is simple, quick, cheap, there is higher clinical value.
Intelligence wearing product at present on the market using four electrode method measurement bio-impedance or human body component is fewer and fewer, greatly
It is mostly using eight electrode methods measurement bio-impedance or human body component, such as the Inbody Human fat balance or bioelectrical impedance analysis of South Korea
Instrument is not belonging to wearable field product using eight electrode methods, at high cost, is not easy to carry；Millet, Huawei's body fat claim to adopt
It is four electrode method, is not belonging to wearable field product, volume is big, is equally not easy to carry.
Electrocardio product on the market applied to wearable field is more, and otherness is big.24 hours dynamic electrocardiograms of hospital
Figure equipment is inconvenient to carry, and multi-electrode is connect with body, be easy to cause the discomforts such as body itch；Apple wrist-watch can detect the heart
Electric signal, but it is expensive；Other electrocardio bracelet product standards are different, and accuracy not can guarantee.
Another is it is worth noting that, want to be able to detect body fat and electrocardiosignal on one device, city at present
Not yet there is such wearable product on face.In view of the above problems, the invention proposes a kind of detectable bio-impedance and the hearts
The wearable device of electricity not only can detect human body component, but also detectable electrocardiosignal, and then detect body fat degree and pre- thought-read
Vascular diseases, it is at low cost, precision is high, easy to carry, application value with higher.
Summary of the invention
The purpose of the present invention is overcome the deficiencies of the prior art and provide a kind of detectable bio-impedance and cardiac electrical wearable
Equipment, measuring system and method.
Technical scheme is as follows: the present invention provides a kind of detectable bio-impedance and cardiac electrical wearable device,
It include: that shell, watchband and four electrode slices for detecting bio-impedance and ecg information, the watchband are connect with shell,
Two electrode slices of four electrode slices are set to the shell front, other two electrode slice is set to the back side of the shell；
Be equipped in the shell processor module, signal generating module, biological impedance module, electrocardio measurement module,
Charging module, display module and communication module, the processor module respectively with the signal generating module, biological impedance
Module, electrocardio measurement module, charging module, display module and communication module connection, the signal generator module also with it is described
The connection of biological impedance module；
Need to use four electrode slices, the bio-impedance when biological impedance module detection bio-impedance
Measurement module is connect with four electrode slices respectively, and when electrocardio measurement module measurement electrocardiosignal needs to use wherein three
A electrode slice, three electrode slices include: two electrode slices and a positive electrode slice at the back side of shell.
Analog-digital converter is equipped between the biological impedance module and the processor module, the electrocardio measures mould
Analog-digital converter is equipped between block and the processor module.
The processor module includes signal generating module；
The biological impedance module includes: voltage follower, first to fourth resistance, first to fourth capacitor,
One gating switch, the second gating switch and instrument amplification module, the input cathode of the voltage follower and its first output end
Connection, input anode are connect with the signal generating module, and the instrument amplification module has first input end, the second input
End and second output terminal, the second output terminal are connect with the processor module, the first input of the instrument amplification module
End is connect with the common end of first gating switch, and the second input terminal of the instrument amplification module is opened with second gating
The common end of pass connects, and first to fourth resistance latter end of connecting is connect with the first output end of the voltage follower,
The other end is connected to ground wire, and the first gated end of first gating switch and the first output end of the voltage follower connect
It connects, the second gated end of first gating switch is connected between second resistance and 3rd resistor, second gating switch
The first gated end be connected between first resistor and second resistance, the second gated end of second gating switch is connected to
Between three resistance and the 4th resistance, described first capacitor one end is connected between first resistor and second resistance, other end connection
To the positive electrode slice of shell, second capacitor one end is connected between second resistance and 3rd resistor, and the other end connects
It is connected to another positive electrode slice of shell, third capacitor one end is connected between 3rd resistor and the 4th resistance, another
End is connected to an electrode slice of back side of shell, and described 4th capacitor one end is connected to ground wire, and the other end is connected to back side of shell
Another electrode slice.
The electrocardio measurement module includes: the pre-amplification circuit connecting with three electrode slices and the preceding storing
The high-pass filtering circuit of big circuit connection, the 50Hz trap circuit being connect with the high-pass filtering circuit and the 50Hz trap
The main amplifying circuit of circuit connection and the low-pass filter circuit being connect with the main amplifying circuit.
The pre-amplification circuit two electrode slices with the positive another electrode slice of the shell and back side of shell respectively
Connection.
The wearable device further includes the 5th capacitor and single-touch key, and described 5th capacitor one end and shell are positive
The connection of another electrode slice, the other end and the single-touch are by key connection.
The processor module controls the signal generating module and exports the sine wave exciting signal of 50kHz to the biology
Impedance measurement module.
The wearable device is the intelligent wearable device being worn in wrist.
The present invention also provides a kind of detectable bio-impedance and cardiac electrical measuring systems, comprising: above-mentioned wearable device,
The intelligent terminal being connect with the communication module and the cloud server being connect with the intelligent terminal.
The present invention also provides a kind of detectable bio-impedance and cardiac electrical measurement methods, measure the method packet of bio-impedance
It includes:
Wearable device is worn in wrist, and makes two electrode slices and wrist of the wearable device back side of shell
It completely attaches to；
Positive two electrode slices of two fingers of an other hand and the wearable device shell are completely attached to；
Under the action of the sine wave exciting signal that signal generator generates, electric signal is made wearable by four electrode slices
Equipment and human body are formed into a loop；
In biological impedance module, to electric signal in such a way that channel switches, it is corresponding that two channels are measured respectively
The voltage of resistance, then by series circuit current principle, equation is constructed to the result of two channel measurements, and complete biology
The measurement of impedance；
Measuring cardiac electrical method includes:
Wearable device is worn in wrist, and makes two electrode slices and wrist of the wearable device back side of shell
It completely attaches to；
A positive electrode slice for one finger of an other hand and the wearable device shell is completely attached to；
By the beating for having rhythmicity of heart, so that blood circulates in vivo, described in the electric signal streams warp of generation
It is formed into a loop on three electrode slices of wearable device shell；
Electrocardio measurement module is converted into digital letter by the amplification and filtering processing to electric signal, then through analog-digital converter
Number, and be input to processor module and be analyzed and processed, the measurement of electrocardiosignal is completed, and draw corresponding electrocardiogram.
Using the above scheme, the present invention provides a kind of detectable bio-impedance and cardiac electrical wearable device, measuring system
And method, it can be realized simultaneously the measurement function of bio-impedance and electrocardiosignal, using four electrode method measurement bio-impedance, then
Share three electrodes therein on this four electrodes and complete electrocardio measurement, optimize device structure, reduce equipment volume, reduce at
This, while guaranteeing measurement accuracy.
Detailed description of the invention
Fig. 1 is the schematic diagram of the present invention detectable bio-impedance and cardiac electrical measuring system.
Fig. 2 is the connection schematic diagram of biological impedance module and electrocardio measurement module in the present invention.
Fig. 3 is the Facad structure figure of the present invention detectable bio-impedance and cardiac electrical wearable device.
Fig. 4 is the backside structure figure of the present invention detectable bio-impedance and cardiac electrical wearable device.
Specific embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
The present invention provides a kind of detectable bio-impedance and cardiac electrical wearable device referring to FIG. 1 to FIG. 4, comprising: shell
Body, watchband and four electrode slices P1, P2, P3, P4 for detecting bio-impedance and ecg information, the watchband and shell
It connects, two electrode slices P1, P2 in four electrode slices P1, P2, P3, P4 are set to the shell front, other two electrode slice
P3, P4 are set to the back side of the shell.
Processor module U1, signal generating module, biological impedance module U2, electrocardio measurement are equipped in the shell
Module U3, charging module, display module and communication module, the processor module respectively with the signal generating module, biology
Impedance measurement module, electrocardio measurement module, charging module, display module and communication module connection, the signal generator module
It is also connect with the biological impedance module, the charging module is used to provide working power, the communication to whole equipment
Module preferably uses communication to communicate, such as bluetooth approach.When the biological impedance module U2 detection bio-impedance
Need to use described four electrode slices P1, P2, P3, P4, the biological impedance module U2 respectively with four electrode slices
P1, P2, P3, P4 connection, when electrocardio measurement module U3 measurement electrocardiosignal need to use wherein three electrode slice P2, P3,
P4, described three electrode slices P2, P3, P4 include: two electrode slices P3, the P4 and a positive electrode slice at the back side of shell
P2。
Analog-digital converter is equipped between the biological impedance module U2 and the processor module U1, the electrocardio is surveyed
It measures and is equipped with analog-digital converter between the module U3 and processor module U1.The processor module includes that mould occurs for signal
Block.The biological impedance module U2 includes: voltage follower A1, first to fourth resistance Rref, Rb1, Rb2, Rb3,
One to the 4th capacitor C1, C2, C3, C4, the first gating switch S1, the second gating switch S2 and instrument amplification module U4, the electricity
The input cathode of pressure follower A1 is connect with its first output end, and input anode is connect with the signal generating module, described
Processor module controls the sine wave exciting signal that signal generating module generates a 50kHz, to provide pumping signal to described
Biological impedance module U2, the voltage follower A1 are used to improve the carrying load ability in sine-wave excitation source.The instrument
Amplification module U4 has first input end, the second input terminal and second output terminal, the second output terminal and the processor die
Block U1 connection, the first input end of the instrument amplification module U4 are connect with the common end S13 of the first gating switch S1,
The second input terminal of the instrument amplification module U4 is connect with the common end S23 of the second gating switch S2, described first to
One end is connect with the first output end of the voltage follower A1 after 4th resistance Rref, Rb1, Rb2, Rb3 series connection, and the other end connects
It is connected to ground wire, the first gated end S11 of the first gating switch S1 is connect with the first output end of the voltage follower A1,
The second gated end S12 of the first gating switch S1 is connected between second resistance R1 and 3rd resistor R2, second choosing
The the first gated end S21 for opening up pass S2 is connected between first resistor Rref and second resistance r1, the second gating switch S2
The second gated end S22 be connected between 3rd resistor R2 and the 4th resistance R3, the one end the first capacitor C1 is connected to first
Between resistance Rref and second resistance R1, the other end is connected to the positive electrode slice P1 of shell, the second capacitor C2 mono-
End is connected between second resistance R1 and 3rd resistor R2, and the other end is connected to positive another electrode slice P2 of shell, described
The one end third capacitor C3 is connected between 3rd resistor R2 and the 4th resistance R3, and the other end is connected to an electrode of back side of shell
The one end piece P3, the 4th capacitor C4 is connected to ground wire, and the other end is connected to another electrode slice P4 of back side of shell.The instrument
The effect of table amplification module U4 has two o'clock: 1, improving input resistance, reduce output resistance, improve the extraction energy to small-signal
Power；2, difference amplifier is made, for extracting the pressure drop of first resistor Rref and bio-impedance Rx.
When measuring bio-impedance, the wrist of two electrode slice P3, P4 of back side of shell and hand is touched, then with another
Two fingers of hand are in contact with positive two electrode slices P1, the P2 of shell respectively, such electrode slice P1, P2-human body-electrode
Piece P3, P4 forming circuit.
In biological impedance module U2, first to fourth capacitor C1, C2, C3, C4 plays AC coupled (separated by direct communication)
Effect.First resistor Rref is the reference resistance of known resistance value, and second resistance Rb1,3rd resistor Rb2, the 4th resistance Rb3 are
Known biasing resistor passes through biased electrical primarily to providing a fixed bias voltage to instrument amplifier U4 input terminal
In testing whether the variation of pressure can identify at this time.In Fig. 2, resistance Rx1 is two to be in contact with electrode slice P1, P2
Resistance between finger, resistance Rx2 are the skin resistance between electrode slice P3, the P4 touched with wrist, and resistance Rx is human body
Overall electrical resistance, as required bio-impedance.First gating switch S1 and the second gating switch S2 is single-pole double-throw switch (SPDT),
First gating switch S1 and the second gating switch S2 is controlled come handover measurement channel by processor module U1, measures corresponding electricity
Pressure.U4 is instrument amplifier, is mainly used for improving the extractability to small-signal, while in order to obtain first resistor Rref
With the pressure drop of resistance Rx, voltage follower A1 is in order to improve the carrying load ability of exciting signal source.
In order to measure bio-impedance, i.e. resistance Rx, pass through processor module U1 first for the public of the first gating switch S1
It holds S13 and the first gated end S11 to connect, the common end S23 of the second gating switch S2 and the first gated end S21 is connected, at this time
It can measure the voltage Uref, Uref at the both ends first resistor Rref to turn after instrument amplifier amplifies, then through analog-digital converter ADC1
At digital signal, and because first resistor Rref is known resistance, then the electric current I1 of biological impedance modular circuit can be acquired.
Then the common end S13 of the first gating switch S1 and the second gated end S12 is connected by processor module, it will
The common end S23 of second gating switch S2 and the second gated end S22 is connected, and that measure at this time is 3rd resistor Rb2 and biology resistance
The voltage Ux at the both ends all-in resistance Rs after anti-Rx is in parallel can equally be acquired after flowing through 3rd resistor Rb2 and bio-impedance Rx parallel connection
The electric current I2 of all-in resistance Rs.
Wherein, the calculation relational expression of all-in resistance Rs are as follows: Rs=(Rx*Rb2)/(Rx+Rb2).
Again due to series circuit current principle, i.e. I1=I2, equation Uref/Rref=Ux/Rs can be obtained, it will
Rs relational expression brings equation into, can find out Rx, i.e. bio-impedance Rx calculation relational expression are as follows:
Rx=(Ux*Rref*Rb2)/(Uref*Rb2-Ux*Rref), in conjunction with artificially input height, the age, weight,
Individual's parameter such as gender, can calculate the body fat of human body by correlativity formula.
Relevant calculated result is sent to extraneous intelligent terminal by communication module by processor module U1.
The electrocardio measurement module U3 include: the pre-amplification circuit U31 being connect with described three electrode slices P2, P3, P4,
The high-pass filtering circuit U32 connecting with the pre-amplification circuit U31, the 50Hz connecting with the high-pass filtering circuit U32 are fallen into
Wave circuit U33, connect with the 50Hz trap circuit U33 main amplifying circuit U34 connecting and with the main amplifying circuit U34
The low-pass filter circuit U35 connect.The pre-amplification circuit U31 respectively with the positive another electrode slice P2 of the shell and shell
Two electrode slices P3, the P4 at the back side are connected.
Pre-amplification circuit U31: the quality of the pre-amplification circuit U31 design directly affects the quality of signal, due to
The electrocardiosignal being extracted is the small-signal of unstable high internal resistance, in order to reduce the influence of singal source resistance, it is necessary to improve
Amplifier input impedance.Under normal circumstances, the internal resistance of signal source is 100k Ω, then the input impedance of amplifier should be greater than 1M Ω.
In addition, the amplitude range of electrocardiosignal is 0.5~5mV, frequency response is 0.05~100Hz, belongs to small-signal, thus what is needed puts
Big device gain is higher.The pre-amplification circuit U31 amplification factor is about 10 times.
High-pass filtering circuit U32: since electrocardiosignal is faint, multistage amplification is needed, but multistage direct-coupled direct current is put
Big device easily causes baseline drift.RC coupling circuit are used between dual-stage amplifier, are reached while isolated DC signal
The effect of high-pass filtering.
50Hz trap circuit U33: electrocardiosignal is particularly susceptible to the Hz noise of 50Hz since frequency is low, therefore needs
Inhibited with bandstop filter (i.e. 50Hz trap circuit U33).The 50Hz trap circuit U33 is the voltage-controlled voltage of second order
Source bandstop filter (the Butterwoth responds).
Main amplifying circuit U34: the amplitude very little of electrocardiosignal, generally only 1mv or so, and system carries out analog-to-digital conversion
The input voltage range of chip is 0~5V, and pre-amplification circuit U31 amplification factor is about 10 times before this, therefore entire measurement
Module also needs the main amplifying circuit U34 of one 100 amplification to amplify signal.
Low-pass filter circuit U35: there is the severe jamming higher than 100Hz high-frequency harmonic in electrocardiosignal in collection process,
Therefore the processing of low-pass filter circuit must be carried out.The low-pass filter circuit that the present invention uses is second order voltage-controlled power supply type low pass filtered
Wave device.
Measurement ecg information need to use tri- electrode slices of P2, P3, P4, share these three with biological impedance module U2
Electrode, when measuring ecg information, the wrist of electrode slice P3, P4 of back side of shell and hand is touched, then with another hand
A finger be in contact with the positive electrode slice P2 of shell, such electrode slice P2-human body-electrode slice P3, P4 forming circuit.
The electrocardiosignal come in through described three electrode slices P2, P3, P4 transmission, after the processing of above-mentioned five big circuits, stablized,
Apparent electrocardial analog signal, then after analog-digital converter ADC2 conversion, incoming processor module U1 is performed corresponding processing,
Extraneous intelligent terminal is sent to by the communication module later.
In addition, the wearable device can also include the 5th capacitor C5 and single-touch key, the 5th capacitor C5
One end is connect with the positive another electrode slice P2 of shell, and by key connection, the 5th capacitor C5 is played for the other end and the single-touch
AC coupled effect.
In the present embodiment, the wearable device is the intelligent wearable device being worn in wrist.
Referring to Fig. 1, the present invention also provides a kind of detectable bio-impedance and cardiac electrical measuring systems, comprising: above-mentioned
Wearable device, the intelligent terminal being connect with the communication module and the cloud server being connect with the intelligent terminal.
The biological impedance module U2 and the electrocardio measurement module U3 above method detect bio-impedance Rx and electrocardio
Signal, incoming processor module U1 are performed corresponding processing, and pass to cell phone application by the communication module later, and are shown detailed
Thin ecg information, while electrocardiogram is drawn, part necessary data will be passed to cloud by APP and carry out subsequent big data point
Analysis.
The present invention also provides a kind of detectable bio-impedance and cardiac electrical measurement methods, are applied in wearable device,
Specific measurement method is as follows:
1, measuring the method for bio-impedance includes: wearable device to be worn in wrist, and make the wearable device
Two electrode slices and wrist of back side of shell completely attach to.By two fingers of an other hand and the wearable device shell
Positive two electrode slices completely attach to.Under the action of the sine wave exciting signal that signal generator generates, electric signal is logical
Crossing four electrode slices is formed into a loop wearable device and human body.In biological impedance module, channel is passed through to electric signal
The mode of switching measures the voltage of two channel corresponding resistors respectively, then by series circuit current principle, to two channels
The result of measurement constructs equation, and completes the measurement of bio-impedance.
2, measuring cardiac electrical method includes: wearable device to be worn in wrist, and make the wearable device shell
Two electrode slices and wrist at the back side completely attach to；Just by a finger of an other hand and the wearable device shell
One electrode slice in face completely attaches to；By the beating for having rhythmicity of heart, so that blood circulates in vivo, generation
Electric signal streams on three electrode slices of the wearable device shell through being formed into a loop；Electrocardio measurement module passes through to electric signal
Amplification and filtering processing, then it is converted into digital signal through analog-digital converter, and be input to processor module and be analyzed and processed, it is complete
At the measurement of electrocardiosignal, and draw corresponding electrocardiogram.
Specifically, processor module passes to cell phone application by the communication module, and shows detailed ecg information, together
When draw electrocardiogram, part necessary data will be passed to cloud by APP and carry out subsequent big data analysis
In conclusion the present invention provides a kind of detectable bio-impedance and cardiac electrical wearable device, measuring system and side
Method can be realized simultaneously the measurement function of bio-impedance and electrocardiosignal, using four electrode method measure bio-impedance, then this four
Three electrodes therein are shared on a electrode and complete electrocardio measurement, are optimized device structure, are reduced equipment volume, reduce cost, together
When guarantee measurement accuracy.
The above is merely preferred embodiments of the present invention, be not intended to restrict the invention, it is all in spirit of the invention and
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within principle.
Claims (10)
1. a kind of detectable bio-impedance and cardiac electrical wearable device characterized by comprising shell, watchband and be used for
Four electrode slices of bio-impedance and ecg information are detected, the watchband is connect with shell, two electrode slices of four electrode slices
Set on the shell front, other two electrode slice is set to the back side of the shell；
Processor module, signal generating module, biological impedance module, electrocardio measurement module, charging are equipped in the shell
Module, display module and communication module, the processor module respectively with the signal generating module, biological impedance mould
Block, electrocardio measurement module, charging module, display module and communication module connection, the signal generator module also with the life
The connection of object impedance measurement module；
Need to use four electrode slices, the biological impedance when biological impedance module detection bio-impedance
Module is connect with four electrode slices respectively, needs to use wherein three electricity when the electrocardio measurement module measures electrocardiosignal
Pole piece, three electrode slices include: two electrode slices and a positive electrode slice at the back side of shell.
2. detectable bio-impedance according to claim 1 and cardiac electrical wearable device, which is characterized in that the biology
Analog-digital converter, the electrocardio measurement module and the processor die are equipped between impedance measurement module and the processor module
Analog-digital converter is equipped between block.
3. detectable bio-impedance according to claim 1 and cardiac electrical wearable device, which is characterized in that the processing
Device module includes signal generating module；
The biological impedance module includes: voltage follower, first to fourth resistance, first to fourth capacitor, the first choosing
Pass, the second gating switch and instrument amplification module are opened up, the input cathode of the voltage follower is connect with its first output end,
Its input anode is connect with the signal generating module, the instrument amplification module with first input end, the second input terminal and
Second output terminal, the second output terminal are connect with the processor module, the first input end of the instrument amplification module with
The common end of first gating switch connects, the second input terminal of the instrument amplification module and second gating switch
Common end connection, first to fourth resistance latter end of connecting is connect with the first output end of the voltage follower, another
End is connected to ground wire, and the first gated end of first gating switch is connect with the first output end of the voltage follower, institute
The second gated end for stating the first gating switch is connected between second resistance and 3rd resistor, and the first of second gating switch
Gated end is connected between first resistor and second resistance, and the second gated end of second gating switch is connected to 3rd resistor
Between the 4th resistance, described first capacitor one end is connected between first resistor and second resistance, and the other end is connected to shell
A positive electrode slice, second capacitor one end are connected between second resistance and 3rd resistor, and the other end is connected to shell
Another positive electrode slice of body, third capacitor one end are connected between 3rd resistor and the 4th resistance, other end connection
To an electrode slice of back side of shell, described 4th capacitor one end is connected to ground wire, and the other end is connected to the another of back side of shell
A electrode slice.
4. detectable bio-impedance according to claim 1 and cardiac electrical wearable device, which is characterized in that the electrocardio
Measurement module includes: the pre-amplification circuit connecting with three electrode slices, the high pass connecting with the pre-amplification circuit
Filter circuit, the 50Hz trap circuit being connect with the high-pass filtering circuit, the main amplification being connect with the 50Hz trap circuit
Circuit and the low-pass filter circuit being connect with the main amplifying circuit.
5. detectable bio-impedance according to claim 4 and cardiac electrical wearable device, which is characterized in that described preposition
Amplifying circuit is connect with two electrode slices of the positive another electrode slice of the shell and back side of shell respectively.
6. detectable bio-impedance according to claim 3 and cardiac electrical wearable device, which is characterized in that further include
Five capacitors and single-touch key, described 5th capacitor one end are connect with the positive another electrode slice of shell, the other end with it is described
Single-touch is by key connection.
7. detectable bio-impedance according to claim 3 and cardiac electrical wearable device, which is characterized in that the processing
Device module controls the signal generating module and exports the sine wave exciting signal of 50kHz to the biological impedance module.
8. detectable bio-impedance according to claim 1-7 and cardiac electrical wearable device, which is characterized in that
The wearable device is the intelligent wearable device being worn in wrist.
9. a kind of detectable bio-impedance and cardiac electrical measuring system characterized by comprising any one of claim 1-7 institute
The wearable device stated, the intelligent terminal being connect with the communication module and the cloud service being connect with the intelligent terminal
Device.
10. a kind of detectable bio-impedance and cardiac electrical measurement method, which is characterized in that the method for measuring bio-impedance includes:
Wearable device is worn in wrist, and keeps two electrode slices of the wearable device back side of shell and wrist complete
Contact；
Positive two electrode slices of two fingers of an other hand and the wearable device shell are completely attached to；
Under the action of the sine wave exciting signal that signal generator generates, electric signal makes wearable device by four electrode slices
It is formed into a loop with human body；
In biological impedance module, to electric signal in such a way that channel switches, two channel corresponding resistors are measured respectively
Voltage, then by series circuit current principle, equation is constructed to the result of two channel measurements, and complete bio-impedance
Measurement；
Measuring cardiac electrical method includes:
Wearable device is worn in wrist, and keeps two electrode slices of the wearable device back side of shell and wrist complete
Contact；
A positive electrode slice for one finger of an other hand and the wearable device shell is completely attached to；
By the beating for having rhythmicity of heart, so that blood circulates in vivo, can be worn described in the electric signal streams warp of generation
It wears and is formed into a loop on three electrode slices of apparatus casing；
Electrocardio measurement module is converted into digital signal by the amplification and filtering processing to electric signal, then through analog-digital converter, and
It is input to processor module to be analyzed and processed, completes the measurement of electrocardiosignal, and draw corresponding electrocardiogram.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
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| CN201811489648.4A CN109381180B (en) | 2018-12-06 | 2018-12-06 | Wearable device capable of detecting bioimpedance and electrocardio, measurement system and method |
| PCT/CN2019/116906 WO2020114197A1 (en) | 2018-12-06 | 2019-11-09 | Wearable device and measurement system and method capable of detecting bio-impedance and electrocardiogram |
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| CN201811489648.4A CN109381180B (en) | 2018-12-06 | 2018-12-06 | Wearable device capable of detecting bioimpedance and electrocardio, measurement system and method |
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| CN109381180B (en) | 2024-09-24 |
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