CN106137192A - A kind of body impedance measurement devices and bioelectrical impedance analysis instrument thereof - Google Patents
A kind of body impedance measurement devices and bioelectrical impedance analysis instrument thereof Download PDFInfo
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- CN106137192A CN106137192A CN201610597869.8A CN201610597869A CN106137192A CN 106137192 A CN106137192 A CN 106137192A CN 201610597869 A CN201610597869 A CN 201610597869A CN 106137192 A CN106137192 A CN 106137192A
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- detecting electrode
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- electrode unit
- measuring circuit
- operational amplifier
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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
- A61B5/05—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
-
- A—HUMAN NECESSITIES
- 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
-
- 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
-
- 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
- A61B5/7221—Determining signal validity, reliability or quality
-
- 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
Abstract
The invention discloses a kind of body impedance measurement devices and bioelectrical impedance analysis instrument thereof, relate to human body component detection technique field, body impedance measurement devices therein includes: detecting electrode unit, measuring circuit unit, analog switch unit and signal gathering unit；Detecting electrode unit is connected with measuring circuit unit, and measuring circuit unit is connected with signal gathering unit by analog switch unit；Detecting electrode unit and human contact, be provided with operational amplifier in output detections electric current, measuring circuit unit, for being amplified processing to detection electric current.The body impedance measurement devices of the present invention and bioelectrical impedance analysis instrument thereof, operational amplifier can be used to be amplified processing to detection electric current, useful signal can be amplified, operational amplifier has high input impedance and low output impedance, and the impact of upper limb and lower limb can be overcome when carrying out the impedance detection of trunk, make measurement result more accurate, it is possible to obtain biological component data more accurately.
Description
Technical field
The present invention relates to human body component detection technique field, particularly relate to a kind of body impedance measurement devices and human body becomes
Divide analyser.
Background technology
Human body is made up of moisture, protein, fat and mineral etc., and these four material is the basic one-tenth of composition human body
Point, the balance between them is extremely important to health.Bioelectrical impedance analysis instrument is the side that one measures bio-electrical impedance (BIA)
Method determines the instrument of human body component.It uses faint, human body sensory less than alternating constant current, by human body hands, foot with
Electrode connects, and measures the impedance value of each ingredient of human body.Body fat mass in human body is electrical insulator, and muscle moisture is relatively
Many, for easy conductive body, if fat content is many, muscle is few, and when electric current passes through, biochemistry resistance value is of a relatively high；Otherwise, biochemical electricity
Resistance is relatively low.By information above, the mathematical model according to all ages and classes, sex and different crowd can be with quantitative analysis
Human body component.The human body component that bioelectrical impedance analysis instrument records has: intracellular fluid, extracellular fluid, total water, body fat, body egg
In vain, 8 kinds of compositions such as muscle, lean body mass and mineral.At present, employing bio-electrical impedance detection side usual to human body impedance measuring
Method, bio-electrical impedance detection method is a method measuring the impedance operator that human body demonstrates under different a-c cycles.
But owing to the uncertainty of contact impedance and the impedance of extremity and trunk of human body numerically exist sizable difference,
The impedance detected is the most unstable, and its accuracy is the lowest.
Summary of the invention
In view of this, the technical problem that the invention solves the problems that is to provide a kind of body impedance measurement devices and human body thereof
Analytical instrument.
According to an aspect of the present invention, it is provided that a kind of body impedance measurement devices, including: detecting electrode unit, electricity is measured
Road unit, analog switch unit and signal gathering unit；Described detecting electrode unit is connected with measuring circuit unit, described measurement
Circuit unit is connected with described signal gathering unit by analog switch unit；Described detecting electrode unit and human contact, use
It is provided with operational amplifier, for described detection electric current is amplified in output detections electric current, described measuring circuit unit
Process.
Alternatively, measuring circuit unit includes: the first measuring circuit；Described first measuring circuit includes: the first computing is put
Big device；First detecting electrode unit is connected with the positive input terminal of described first operational amplifier, described first operational amplifier
Outfan is connected with described analog switch unit by circuit, and the negative input end of described first operational amplifier is with described circuit even
Connect.
Alternatively, described first detecting electrode unit includes: right hand detecting electrode unit and right crus of diaphragm detecting electrode unit；The
The quantity of one measuring circuit is 2,2 described first measuring circuits and described right hand detecting electrode unit and right crus of diaphragm detecting electrode
Unit is that one_to_one corresponding is arranged.
Alternatively, described measuring circuit unit includes: the second measuring circuit；Described second measuring circuit includes: the second fortune
Calculate amplifier, the first resistance, the second resistance, the first analog switch；Second detecting electrode unit and described second operational amplifier
Positive input terminal connect, described first resistance and described second resistant series, form the first electronic circuit, described second operation amplifier
The outfan of device is connected with described analog switch unit by the second electronic circuit；One end ground connection of described first electronic circuit, another
End is connected with the second electronic circuit；The is drawn on described first electronic circuit and between described first resistance and the second resistance
One switching branches, on described first electronic circuit and be positioned at described second resistance and the first electronic circuit and the connection on the second sub-road
Second switch branch road is drawn between point；One end of described first analog switch connects with the negative input end of described second operational amplifier
Connecing, the other end is connected with described first switching branches or second switch branch road.
Alternatively, described second detecting electrode unit includes: left hand detecting electrode unit and left foot detecting electrode unit；The
The quantity of two measuring circuits is 2,2 described second measuring circuits and described left hand detecting electrode unit and left foot detecting electrode
Unit is that one_to_one corresponding is arranged.
Alternatively, described detecting electrode unit includes: the first detecting electrode, the second detecting electrode；Described first detection electricity
Pole and described second detecting electrode all with human contact, described first detecting electrode output measure electric current, described second detection electricity
Pole acquisition testing signal also exports described detection electric current.
Alternatively, including sinusoidal detection signal generator module；Described sinusoidal signal generator module produces and is applied to institute
State the sine-shaped measurement electric current on the first detecting electrode.
Alternatively, the frequency of described measurement electric current includes: 1kHz, 5kHz, 50kHz, 250kHz, 500kHz, 1000kHz.
Another aspect according to present aspect, it is provided that a kind of bioelectrical impedance analysis instrument, including: human body impedance as above is surveyed
Amount device.
Alternatively, the quantity of described detecting electrode unit is 4；Wherein, 2 described detecting electrode unit are fixed on human body
Analytical instrument hold on handle, 2 described detecting electrode unit are fixed on the pedal of bioelectrical impedance analysis instrument.
The body impedance measurement devices of the present invention and bioelectrical impedance analysis instrument thereof, can use operational amplifier to detection electricity
Stream carries out processing and amplifying, it is possible to amplify useful signal, reduces effect of noise, and operational amplifier has high input impedance and low
Output impedance, the contact impedance due to human body and electrode slice can be overcome and the impact that produces so that measurement result is more accurate
Really.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
In having technology to describe, the required accompanying drawing used is briefly described, it should be apparent that, the accompanying drawing in describing below is only
Some embodiments of the present invention, for those of ordinary skill in the art, on the premise of not paying creative work, also
Other accompanying drawing can be obtained according to these accompanying drawings.
Fig. 1 is the module composition schematic diagram of an embodiment of the body impedance measurement devices according to the present invention；
Fig. 2 is the schematic diagram of human body equivalent impedance model；
Fig. 3 is the schematic diagram of another embodiment of the body impedance measurement devices according to the present invention.
Detailed description of the invention
With reference to the accompanying drawings the present invention is described more fully, the exemplary embodiment of the present invention is wherein described.Under
Face will combine the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, aobvious
So, described embodiment is only a part of embodiment of the present invention rather than whole embodiments.Based on the reality in the present invention
Execute example, all other embodiments that those of ordinary skill in the art are obtained under not making creative work premise, all belong to
In the scope of protection of the invention.Below in conjunction with each figure and embodiment, technical scheme is carried out many descriptions.
" first ", " second " hereinafter etc., for distinguishing on describing, do not have other special implication.
As it is shown in figure 1, the present invention provides a kind of body impedance measurement devices, including: detecting electrode unit 110, measurement electricity
Road unit 111, analog switch unit 112 and signal gathering unit 113.Detecting electrode unit 110 is with measuring circuit unit 111 even
Connecing, measuring circuit unit 111 is connected with signal gathering unit 113 by analog switch unit 112.
Detecting electrode unit 110 and human contact, be provided with fortune in output detections electric current, measuring circuit unit 111
Calculate amplifier, for being amplified processing to detection electric current.Detecting electrode unit 110 can have multiple, can detect multiple portion
Position also exports multiple detection electric current.Measuring circuit unit 111 can also have multiple, and the control by analog switch unit 112 can
With the detection current input signal collecting unit 113 that one or more measuring circuit unit 111 are amplified.
The body impedance measurement devices of above-described embodiment, can use operational amplifier that detection electric current is amplified place
Reason, it is possible to amplify useful signal, decrease carry out bio-electrical impedance detection time interference noise impact, increase signals collecting can
By property.
Operational amplifier refers to have a signal output port (Out) and homophase, anti-phase two high impedance input
High-gain direct-coupling voltage amplification unit.Feedback resistance refers to that the value of outfan is passed after the conversion of feedback network by impact
Pass input thus affect the resistance of the character of legacy network.Analog switch refers to make analogue signal pass through or blocks
Circuit.
Human body impedance equivalent model is as in figure 2 it is shown, end points that both hands both feet are four voltage detecting.The human body resistance of the present invention
Anti-measurement apparatus uses 5 sections of methods to carry out bio-electrical impedance detection, for the right upper extremity of human body, left upper extremity, trunk, right lower extremity, a left side
Lower limb, measuring circuit unit 111 chooses the measuring circuit of different amplification, it is possible to the limb section different for human body selects
The detection of property.
As it is shown on figure 3, measuring circuit unit includes: the first measuring circuit.First measuring circuit includes: the first operation amplifier
Device UB.The positive input terminal of the first detecting electrode unit and the first operational amplifier UB connects.Analog switch unit includes: the 3rd mould
Intend switch SW3 and the 4th analog switch SW4.Signal gathering unit 113 is acquired according to the signal at S+ and S-two ends and divides
The impedance of the analysis different limb sections to draw human body.The outfan of the first operational amplifier UB passes through circuit and the 3rd analog switch
SW3 connects, and the negative input end of the first operational amplifier UB is connected with circuit, and i.e. when detection, the first operational amplifier UB's is negative
The outfan of input and the first operational amplifier UB is in being directly connected to state.
The quantity of the first detecting electrode unit or the position of detection can be configured according to demand.Such as, the first detection
Electrode unit includes: right hand detecting electrode unit 32 and right crus of diaphragm detecting electrode unit 34.2 identical first can be arranged measure
Circuit, 2 the first measuring circuits are arranged with right hand detecting electrode unit 32 and right crus of diaphragm detecting electrode unit 34 one_to_one corresponding respectively,
The right hand, right crus of diaphragm can be carried out impedance detection.The most just selected by analog switch SW3, SW4, negative pole, making 2 first surveys
The detection electric current of amount circuit conveying is by S+ and S-two ends, and signal gathering unit 113 is carried out according to the signal at S+ and S-two ends
Gather and analyze, to draw the different limb section impedances of human body.
In one embodiment, measuring circuit unit includes: the second measuring circuit.Second measuring circuit includes: the second fortune
Calculate amplifier UA, the first resistance R1, the second resistance R2, the first analog switch SW1.Second detecting electrode unit and the second computing are put
The positive input terminal of big device UA connects, the first resistance R1 and the second resistance R2 series connection, forms the first electronic circuit.Second operational amplifier
The outfan of UA is connected with analog switch SW3 by the second electronic circuit.
One end ground connection of the first electronic circuit, the other end and the second electronic circuit connect.On the first electronic circuit and be positioned at first
The first switching branches 36 is drawn between resistance R1 and the second resistance R2.On the first electronic circuit and be positioned at the second resistance R2 and
Second switch branch road 35 is drawn between the junction point on one electronic circuit and the second sub-road.One end and second of first analog switch SW1
The negative input end of operational amplifier UA connects, and the other end connects with the first switching branches 36 or second switch branch road 35.When first
The analog switch SW1 other end and the first switching branches 36 connect, and form difference channel.
The quantity of the second detecting electrode unit or the position of detection can be configured according to demand.Such as, the second detection
Electrode unit includes: left hand detecting electrode unit 31 and left foot detecting electrode unit 33.2 identical second can be arranged measure
Circuit, 2 the second measuring circuits are arranged with left hand detecting electrode unit 31 and left foot detecting electrode unit 33 one_to_one corresponding respectively,
Left hand, left foot can be carried out impedance detection.Such as, left foot detecting electrode unit 33 also connects the second measuring circuit, and second
Measuring circuit includes: operational amplifier UC, resistance R3 and R4, analog switch SW2, and connected mode is identical.
2 the second measuring circuits are connected with left hand detecting electrode unit 31 and left foot detecting electrode unit 33 respectively, pass through
Analog switch SW1, SW2 are the most just selecting, negative pole, make the detection electric current of 2 the second measuring circuit conveyings by S+ and S-two
End, signal gathering unit 113 is according to the signal at S+ and S-two ends being acquired and analyzed draw the different limb sections resistance of human body
Anti-.
Human body is a complex with electrical characteristics, and it is vulnerable to external interference, therefore to needs when detecting
Signal is amplified and interference is decayed.But due to the uncertainty of contact impedance of human body and extremity and body
Numerically there is sizable difference in dry impedance.The trunk impedance of human body is between 15-35 ohm, and the impedance of extremity exists
Between 150-500 ohm.Therefore, for the right upper extremity of human body, left upper extremity, trunk, right lower extremity, left lower extremity etc., can choose not
Measure with the circuit of amplification.
Operational amplifier UA, UB, UC, UD have high input impedance and extremely low output impedance, and well frequency
Rate characteristic, the most preferably ensure that integrity when signal passes through analog switch.Resistance R2 and R4 is feedback resistance, wherein,
The amplification of R2/R1=R4/R3=signal, the amplification of signal can be configured according to concrete design requirement, example
As for 10 etc..
When detecting extremity impedance, the other end of analog switch SW1 and SW2 is connected with second switch branch road 35 so that put
Big multiple is 1.When detecting trunk, the other end and first switching branches 36 of analog switch SW1 and SW2 connect, and form difference
Circuit, is incorporated into feedback resistance R2, R4 in amplifying circuit, and now circuit is 10 to the amplification of signal.
Body impedance measurement devices in above-described embodiment, operational amplifier is with high input impedance and extremely low output
Impedance, selects feedback resistance when carrying out trunk detection by analog switch, forms difference channel, can carry out detection signal
Amplify, when carrying out extremity impedance detection, detection signal is put and is twice.
Detecting electrode unit includes: the first detecting electrode, the second detecting electrode.First detecting electrode and the second detecting electrode
All contacting with human body (hands, foot), electric current, the second detecting electrode acquisition testing signal are measured in the first detecting electrode output.First inspection
Surveying the driving electric current being applied to load (human body) of electrode output, have the advantages that current values is constant, the constant of electric current is beneficial to
Eliminate external disturbance.Impedance signal, as signals collecting end, is sampled, is collected by the second detecting electrode, and its input impedance is more
Greatly, anti-interference is the strongest.
Sinusoidal detection signal generator module produces the sine-shaped measurement electric current being applied on the first detecting electrode, adopts
Apply the of short duration AC signal of the controlled about 100-500 μ A of size with constant-current source to human body, be used for gathering human body impedance.Measure
The frequency of electric current includes: 1kHz, 5kHz, 50kHz, 250kHz, 500kHz, 1000kHz.Use multi-frequency measurement circuit, surveying
Amount mixes multi-frequency, it is possible to cover the whole frequencies needed for the outer composition of human body cell and cellular content measurement so that survey
Amount result is more accurate.The stability of result that this bioelectrical impedance analysis instrument measures, accuracy, repeatability is used all to be far superior to
The result of traditional product.
In one embodiment, the present invention provides a kind of bioelectrical impedance analysis instrument, including: human body impedance measuring dress as above
Put.The quantity of detecting electrode unit is 4；Wherein, what 2 detecting electrode unit were fixed on bioelectrical impedance analysis instrument holds handle
On, 2 detecting electrode unit are fixed on the pedal of bioelectrical impedance analysis instrument.
The body impedance measurement devices of above-described embodiment offer and bioelectrical impedance analysis instrument thereof, can use operational amplifier
It is amplified processing to detection electric current, it is possible to amplify useful signal, decreases the shadow of interference noise during bio-electrical impedance detection
Ringing, make the reliability of signals collecting strengthen, operational amplifier, can owing to having high input impedance and extremely low output impedance
To overcome the impact produced due to human body and the contact impedance of electrode slice；Pass through analog switch when carrying out trunk detection simultaneously
Select feedback resistance to form difference channel, detection signal can be amplified, overcome the impact of upper limb and lower limb so that measure
Result is more accurate, it is possible to obtain biological component data more accurately.
The method and system of the present invention may be achieved in many ways.Such as, can pass through software, hardware, firmware or
Software, hardware, any combination of firmware realize the method and system of the present invention.Said sequence for the step of method is only
In order to illustrate, the step of the method for the present invention is not limited to order described in detail above, says the most especially
Bright.Additionally, in certain embodiments, the present invention also can be embodied as the program recorded in the recording medium, these programs include
For realizing the machine readable instructions of the method according to the invention.Thus, the present invention also covers storage for performing according to this
The record medium of the program of bright method.
Description of the invention is given for example with for the sake of describing, and is not exhaustively or by the present invention
It is limited to disclosed form.Many modifications and variations are obvious for the ordinary skill in the art.Select and retouch
Stating embodiment is in order to the principle of the present invention and actual application are more preferably described, and enables those of ordinary skill in the art to manage
Solve the present invention thus design the various embodiments with various amendments being suitable to special-purpose.
Claims (10)
1. a body impedance measurement devices, it is characterised in that including:
Detecting electrode unit, measuring circuit unit, analog switch unit and signal gathering unit；
Described detecting electrode unit is connected with described measuring circuit unit, described measuring circuit unit by analog switch unit with
Described signal gathering unit connects；Described detecting electrode unit and human contact, for output detections electric current, described measuring circuit
Unit is provided with operational amplifier, for described detection electric current being amplified process.
2. device as claimed in claim 2, it is characterised in that:
Measuring circuit unit includes: the first measuring circuit；Described first measuring circuit includes: the first operational amplifier；
First detecting electrode unit is connected with the positive input terminal of described first operational amplifier, described first operational amplifier defeated
Going out end to be connected with described analog switch unit by circuit, the negative input end of described first operational amplifier is with described circuit even
Connect.
3. device as claimed in claim 2, it is characterised in that:
Described first detecting electrode unit includes: right hand detecting electrode unit and right crus of diaphragm detecting electrode unit；First measuring circuit
Quantity be 2,2 described first measuring circuits are one by one with described right hand detecting electrode unit and right crus of diaphragm detecting electrode unit
It is correspondingly arranged.
4. device as claimed in claim 1 or 2, it is characterised in that:
Described measuring circuit unit includes: the second measuring circuit；Described second measuring circuit includes: the second operational amplifier,
One resistance, the second resistance, the first analog switch；
Second detecting electrode unit is connected with the positive input terminal of described second operational amplifier, described first resistance and described second
Resistant series, forms the first electronic circuit, and the outfan of described second operational amplifier is left with described simulation by the second electronic circuit
Pass unit connects；One end ground connection of described first electronic circuit, the other end and the second electronic circuit connect；At described first electronic circuit
Upper and draw the first switching branches between described first resistance and the second resistance, on described first electronic circuit and be positioned at
Second switch branch road is drawn between the junction point on described second resistance and the first electronic circuit and the second sub-road；
One end of described first analog switch is connected with the negative input end of described second operational amplifier, the other end and described first
Switching branches or second switch branch road connect.
5. device as claimed in claim 4, it is characterised in that:
Described second detecting electrode unit includes: left hand detecting electrode unit and left foot detecting electrode unit；Second measuring circuit
Quantity be 2,2 described second measuring circuits are one by one with described left hand detecting electrode unit and left foot detecting electrode unit
It is correspondingly arranged.
6. device as claimed in claim 1, it is characterised in that:
Described detecting electrode unit includes: the first detecting electrode, the second detecting electrode；
Described first detecting electrode and described second detecting electrode all with human contact, described first detecting electrode output measure electricity
Stream, described second detecting electrode acquisition testing signal also exports described detection electric current.
7. device as claimed in claim 6, it is characterised in that including:
Sinusoidal detection signal generator module；Described sinusoidal signal generator module produces and is applied on described first detecting electrode
Sine-shaped measurement electric current.
8. device as claimed in claim 7, it is characterised in that including:
The frequency of described measurement electric current includes: 1kHz, 5kHz, 50kHz, 250kHz, 500kHz, 1000kHz.
9. a bioelectrical impedance analysis instrument, it is characterised in that including:
Body impedance measurement devices as described in any one of claim 1 to 8.
10. bioelectrical impedance analysis instrument as claimed in claim 9, it is characterised in that:
The quantity of described detecting electrode unit is 4；
Wherein, what 2 described detecting electrode unit were fixed on bioelectrical impedance analysis instrument holds on handle, 2 described detecting electrode lists
Unit is fixed on the pedal of bioelectrical impedance analysis instrument.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610597869.8A CN106137192A (en) | 2016-07-27 | 2016-07-27 | A kind of body impedance measurement devices and bioelectrical impedance analysis instrument thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610597869.8A CN106137192A (en) | 2016-07-27 | 2016-07-27 | A kind of body impedance measurement devices and bioelectrical impedance analysis instrument thereof |
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| CN106137192A true CN106137192A (en) | 2016-11-23 |
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| CN201610597869.8A Pending CN106137192A (en) | 2016-07-27 | 2016-07-27 | A kind of body impedance measurement devices and bioelectrical impedance analysis instrument thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107582055A (en) * | 2017-09-26 | 2018-01-16 | 歌尔科技有限公司 | A kind of bio-impedance analog meter |
| CN112914576A (en) * | 2020-09-30 | 2021-06-08 | 世耳医疗科技(上海)有限公司 | Human body bioelectricity detection circuit, detection system and detection method |
| CN109171722B (en) * | 2018-10-09 | 2024-03-12 | 深圳市优创亿科技有限公司 | Bioimpedance measurement circuit, bioimpedance measurement method and wearable device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107582055A (en) * | 2017-09-26 | 2018-01-16 | 歌尔科技有限公司 | A kind of bio-impedance analog meter |
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| CN109171722B (en) * | 2018-10-09 | 2024-03-12 | 深圳市优创亿科技有限公司 | Bioimpedance measurement circuit, bioimpedance measurement method and wearable device |
| CN112914576A (en) * | 2020-09-30 | 2021-06-08 | 世耳医疗科技(上海)有限公司 | Human body bioelectricity detection circuit, detection system and detection method |
| CN112914576B (en) * | 2020-09-30 | 2024-03-22 | 世耳医疗科技(上海)有限公司 | Human body bioelectricity detection circuit, detection system and detection method |
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