CN206183266U - Human impedance measuring device and human body component analyzer thereof - Google Patents
Human impedance measuring device and human body component analyzer thereof Download PDFInfo
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- CN206183266U CN206183266U CN201620800136.5U CN201620800136U CN206183266U CN 206183266 U CN206183266 U CN 206183266U CN 201620800136 U CN201620800136 U CN 201620800136U CN 206183266 U CN206183266 U CN 206183266U
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Abstract
The utility model discloses a human impedance measuring device and human body component analyzer thereof relates to body composition and detects technical field, and human impedance measuring device wherein includes: detection electrode unit, measurement circuit unit, analog switch unit and signal acquisition element, the detection electrode unit is connected with measurement circuit unit, and measurement circuit unit passes through the analog switch unit and is connected with signal acquisition element, detection electrode unit and people's physical contact for output measuring current is provided with operational amplifier among the measurement circuit unit, is used for enlargeing the processing to measuring current. The utility model discloses a human impedance measuring device and human body component analyzer thereof can adopt operational amplifier to enlarge the processing to measuring current, can enlarge the effective signal, and operational amplifier possess high input impedance and low output impedance to can overcome the influence of upper limbs and low limbs when carrying out truncal impedance detection, make measuring result more accurate, can obtain more accurate organism and become the subdata.
Description
Technical field
The utility model is related to human body component detection technique field, more particularly to a kind of body impedance measurement devices and its people
Body composition analysis instrument.
Background technology
Human body is made up of moisture, protein, fat and mineral matter etc., these four materials be constitute human body it is basic into
Point, the balance between them is extremely important to health.Bioelectrical impedance analysis instrument is the side of one kind measurement bio-electrical impedance (BIA)
Method determines the instrument of human body component.It using faint, human body sensory less than alternating constant current, by human body hand, foot with
Electrode is connected, and measures the impedance value of each part of human body.Body fat mass in human body is electrical insulator, and muscle moisture compared with
It is many, be easy conductive body, if fat content is more, muscle is few, electric current by when biochemical resistance value it is of a relatively high；Conversely, 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 is measured 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 matter.At present, to the usual use bio-electrical impedance detection side of human body impedance measuring
Method, bio-electrical impedance detection method is the method for the impedance operator that a measurement human body shows under different a-c cycles.
But because numerically there is sizable difference in the impedance of the uncertainty and four limbs and trunk of the contact impedance of human body,
The impedance for detecting is often very unstable, and its accuracy is also very low.
Utility model content
In view of this, a technical problem to be solved in the utility model be to provide a kind of body impedance measurement devices and its
Bioelectrical impedance analysis instrument.
According to one side of the present utility model, there is provided a kind of body impedance measurement devices, including：Detecting electrode unit, survey
Amount circuit unit, analog switch unit and signal gathering unit；The detecting electrode unit is connected with measuring circuit unit, described
Measuring circuit unit is connected by analog switch unit with the signal gathering unit；The detecting electrode unit connects with human body
Touch, for exporting detection electric current, operational amplifier is provided with the measuring circuit unit, for being carried out to the detection electric current
Enhanced processing.
Alternatively, measuring circuit unit includes：First measuring circuit；First measuring circuit includes：First computing is put
Big device；First detecting electrode unit is connected with the positive input terminal of first operational amplifier, first operational amplifier
Output end is connected by circuit with the analog switch unit, and negative input end and the circuit of first operational amplifier connect
Connect.
Alternatively, the 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 first measuring circuits and the right hand detecting electrode unit and right crus of diaphragm detecting electrode
Unit is set to correspond.
Alternatively, the measuring circuit unit includes：Second measuring circuit；Second measuring circuit includes：Second fortune
Calculate amplifier, first resistor, second resistance, the first analog switch；Second detecting electrode unit and second operational amplifier
Positive input terminal connection, the first resistor connect with the second resistance, the first sub-circuit of formation, second operation amplifier
The output end of device is connected by the second sub-circuit with the analog switch unit；One end ground connection of first sub-circuit is another
End is connected with the second sub-circuit；Is drawn on first sub-circuit and between the first resistor and second resistance
One switching branches, on first sub-circuit and positioned at the connection on the second resistance and the first sub-circuit and the second sub- road
Second switch branch road is drawn between point；One end of first analog switch connects with the negative input end of second operational amplifier
Connect, the other end is connected with the first switch branch road or second switch branch road.
Alternatively, the 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 second measuring circuits and the left hand detecting electrode unit and left foot detecting electrode
Unit is set to correspond.
Alternatively, the detecting electrode unit includes：First detecting electrode, the second detecting electrode；The first detection electricity
Pole and second detecting electrode all with human contact, first detecting electrode output measurement electric current, the second detection electricity
Pole acquisition testing signal simultaneously exports the detection electric current.
Alternatively, including sinusoidal detection signal generator module；The sinusoidal signal generator module is produced and is applied to institute
State the measurement electric current of the sinusoidal waveform on the first detecting electrode.
Alternatively, the frequency of the measurement electric current includes：1kHz、5kHz、50kHz、250kHz、500kHz、1000kHz.
According to the another aspect of present aspect, there is provided a kind of bioelectrical impedance analysis instrument, including：Human body impedance as described above is surveyed
Amount device.
Alternatively, the quantity of the detecting electrode unit is 4；Wherein, 2 detecting electrode units are fixed on human body
On the holding handle of analytical instrument, 2 detecting electrode units are fixed on the pedal of bioelectrical impedance analysis instrument.
Body impedance measurement devices of the present utility model and its bioelectrical impedance analysis instrument, can be using operational amplifier to inspection
Survey electric current and be amplified treatment, useful signal can be amplified, reduce the influence of noise, operational amplifier possesses input impedance high
With low output impedance, the influence that can be overcome the contact impedance due to human body and electrode slice and produce so that measurement result is more
Plus it is accurate.
Brief description of the drawings
In order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art, below will be to embodiment
Or the accompanying drawing to be used needed for description of the prior art is briefly described, it should be apparent that, drawings in the following description are only
Only it is some embodiments of the present utility model, for those of ordinary skill in the art, is not paying creative labor
Under the premise of, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is the module composition schematic diagram according to one embodiment of body impedance measurement devices of the present utility model；
Fig. 2 is the schematic diagram of human body equivalent impedance model；
Fig. 3 is the schematic diagram of another embodiment according to body impedance measurement devices of the present utility model.
Specific embodiment
The utility model is described more fully with reference to the accompanying drawings, wherein illustrating exemplary reality of the present utility model
Apply example.Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is carried out clearly
Chu, it is fully described by, it is clear that described embodiment is only a part of embodiment of the utility model, rather than whole realities
Apply example.Based on the embodiment in the utility model, those of ordinary skill in the art institute under the premise of creative work is not made
The all other embodiment for obtaining, belongs to the scope of the utility model protection.With reference to each figure and embodiment to this reality
Many descriptions are carried out with new technical scheme.
" first ", " second " hereinafter etc. is to be distinguished in description, not other special implications.
As shown in figure 1, the utility model provides a kind of body impedance measurement devices, including：Detecting electrode unit 110, survey
Amount circuit unit 111, analog switch unit 112 and signal gathering unit 113.Detecting electrode unit 110 and measuring circuit unit
111 connections, measuring circuit unit 111 is connected by analog switch unit 112 with signal gathering unit 113.
Detecting electrode unit 110 and human contact, for exporting detection electric current, are provided with fortune in measuring circuit unit 111
Amplifier is calculated, for being amplified treatment to detection electric current.Detecting electrode unit 110 can have multiple, can detect multiple portions
Position simultaneously exports multiple detection electric currents.Measuring circuit unit 111 can also have multiple, can by the control of analog switch unit 112
With the detection current input signal collecting unit 113 for amplifying one or more measuring circuit units 111.
The body impedance measurement devices of above-described embodiment, can be amplified place using operational amplifier to detection electric current
Reason, useful signal can be amplified, reduce carry out bio-electrical impedance detect when interference noise influence, increase signal acquisition can
By property.
Operational amplifier refers to a signal output port (Out) and same phase, anti-phase two high impedance inputs
High-gain direct-coupling voltage amplification unit.Feedback resistance refers to influence the value of output end by being passed after the conversion of feedback network
Pass the resistance of input, property so as to influence legacy network.Analog switch refers to that analog signal can be made to pass through or blocking
Circuit.
Human body impedance equivalent model is as shown in Fig. 2 both hands both feet are four end points of voltage detecting.People of the present utility model
Body impedance measurement device carries out bio-electrical impedance detection using 5 sections of methods, right upper extremity, left upper extremity for human body, trunk, bottom right
Limb, left lower extremity, measuring circuit unit 111 choose the measuring circuit of different amplification, can be directed to the different limb section of human body and enter
The detection of row selectivity.
As shown in figure 3, measuring circuit unit includes：First measuring circuit.First measuring circuit includes：First operation amplifier
Device UB.First detecting electrode unit is connected with the positive input terminal of the first operational amplifier UB.Analog switch unit includes：3rd mould
Intend switch SW3 and the 4th analog switch SW4.Signal gathering unit 113 is acquired and divides according to the signal to S+ and S- two ends
Analyse to draw the impedance of the different limbs section of human body.The output end of the first operational amplifier UB passes through circuit and the 3rd analog switch
SW3 is connected, and the negative input end of the first operational amplifier UB is connected with circuit, i.e., in detection, the first operational amplifier UB's is negative
The output end of input and the first operational amplifier UB is in be directly connected to state.
The quantity of the first detecting electrode unit or the position of detection can be configured according to demand.For example, the first detection
Electrode unit includes：Right hand detecting electrode unit 32 and right crus of diaphragm detecting electrode unit 34.2 identicals first can be set to measure
Circuit, 2 the first measuring circuits correspond with right hand detecting electrode unit 32 and right crus of diaphragm detecting electrode unit 34 set respectively,
Impedance detection can be carried out to the right hand, right crus of diaphragm.Selected suitably just by analog switch SW3, SW4, negative pole makes 2 first surveys
By S+ and S- two ends, signal gathering unit 113 is carried out the detection electric current of amount circuit conveying according to the signal to S+ and S- two ends
Collection and analysis, to draw the different limbs section impedance of human body.
In one embodiment, measuring circuit unit includes：Second measuring circuit.Second measuring circuit includes：Second fortune
Calculate amplifier UA, first resistor R1, second resistance R2, the first analog switch SW1.Second detecting electrode unit is put with the second computing
The positive input terminal connection of big device UA, first resistor R1 connects with second resistance R2, forms the first sub-circuit.Second operational amplifier
The output end of UA is connected by the second sub-circuit with analog switch SW3.
One end ground connection of the first sub-circuit, the other end is connected with the second sub-circuit.On the first sub-circuit and positioned at first
First switch branch road 36 is drawn between resistance R1 and second resistance R2.On the first sub-circuit and positioned at second resistance R2 and
Second switch branch road 35 is drawn between the tie point on one sub-circuit and the second sub- road.One end and second of first analog switch SW1
The negative input end connection of operational amplifier UA, the other end is connected with first switch branch road 36 or second switch branch road 35.When first
The analog switch SW1 other ends are connected with first switch branch road 36, form difference channel.
The quantity of the second detecting electrode unit or the position of detection can be configured according to demand.For example, the second detection
Electrode unit includes：Left hand detecting electrode unit 31 and left foot detecting electrode unit 33.2 identicals second can be set to measure
Circuit, 2 the second measuring circuits correspond with left hand detecting electrode unit 31 and left foot detecting electrode unit 33 set respectively,
Impedance detection can be carried out to left hand, left foot.For example, left foot detecting electrode unit 33 is also connected with the second measuring circuit, 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 selection are suitable just, negative pole, the detection electric current of 2 the second measuring circuit conveyings is passed through S+ and S- two
End, signal gathering unit 113 is acquired according to the signal to S+ and S- two ends and analyzes to draw the different limbs section resistance of human body
It is anti-.
Human body is a complex with electrical characteristics, and it is vulnerable to external interference, therefore needs when to detecting
Signal is amplified and interference is decayed.But due to the uncertainty and four limbs and body of the contact impedance of human body
Numerically there is sizable difference in dry impedance.Between 15-35 ohm, the impedance of four limbs exists for the trunk impedance of human body
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
Measured with the circuit of multiplication factor.
Operational amplifier UA, UB, UC, UD have high input impedance and extremely low output impedance, and frequency well
Rate characteristic, therefore integrality when preferably ensure that signal by analog switch.Resistance R2 and R4 are feedback resistance, wherein,
The multiplication factor of R2/R1=R4/R3=signals, the multiplication factor of signal can be configured according to specific design requirement, example
Such as it is 10.
When four limbs impedance is detected, 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 trunk is detected, the other end of analog switch SW1 and SW2 is connected with first switch branch road 36, forms difference
Circuit, feedback resistance R2, R4 are incorporated into amplifying circuit, and now circuit is 10 to the multiplication factor of signal.
Body impedance measurement devices in above-described embodiment, operational amplifier carries high input impedance and extremely low output
Impedance, is being carried out selecting feedback resistance by analog switch when trunk is detected, forms difference channel, and detection signal can be carried out
Amplify, when four limbs impedance detection is carried out, detection signal is put and is twice.
Detecting electrode unit includes：First detecting electrode, the second detecting electrode.First detecting electrode and the second detecting electrode
All contacted with human body (hand, foot), the first detecting electrode output measurement electric current, the second detecting electrode acquisition testing signal.First inspection
Survey electrode output the driving current for being applied to load (human body), with current values it is constant the characteristics of, the constant of electric current is beneficial to
Eliminate external disturbance.Second detecting electrode is sampled to impedance signal, collected as signal acquisition terminal, and its input impedance is got over
Greatly, anti-interference is stronger.
Sinusoidal detection signal generator module produces the measurement electric current of the sinusoidal waveform being applied on the first detecting electrode, adopts
Apply the of short duration AC signal of the controllable about 100-500 μ A of size to human body with constant-current source, for gathering human body impedance.Measurement
The frequency of electric current includes：1kHz、5kHz、50kHz、250kHz、500kHz、1000kHz.Using multi-frequency measurement circuit, surveying
Mix multi-frequency in amount, the whole frequencies needed for the outer composition of human body cell and cellular content measurement can be covered so that survey
Amount result is more accurate.The stability of the result measured using this bioelectrical impedance analysis instrument, accuracy, repeatability are far superior to
The result of traditional product.
In one embodiment, the utility model provides a kind of bioelectrical impedance analysis instrument, including：As above human body impedance is surveyed
Amount device.The quantity of detecting electrode unit is 4；Wherein, 2 detecting electrode units are fixed on the holding of bioelectrical impedance analysis instrument
On handle, 2 detecting electrode units are fixed on the pedal of bioelectrical impedance analysis instrument.
Body impedance measurement devices and its bioelectrical impedance analysis instrument that above-described embodiment is provided, can use operational amplifier
Treatment is amplified to detection electric current, useful signal can be amplified, reduce the shadow of interference noise when bio-electrical impedance is detected
Ring, making the reliability of signal acquisition strengthens, and operational amplifier, can due to possessing high input impedance and extremely low output impedance
The influence produced with overcoming the contact impedance due to human body and electrode slice；Carrying out when trunk is detected by analog switch simultaneously
Difference channel is formed from feedback resistance, detection signal can be amplified, overcome the influence of upper limbs and lower limb so that measurement
Result is more accurate, can obtain more accurate biological component data.
Method and system of the present utility model may be achieved in many ways.For example, can be by software, hardware, firmware
Or any combinations of software, hardware, firmware realize method and system of the present utility model.The step of for method it is above-mentioned
Order is not limited to order described in detail above merely to illustrate, the step of method of the present utility model, unless with it
Its mode is illustrated.Additionally, in certain embodiments, also the utility model can be embodied as recording journey in the recording medium
Sequence, these programs are included for realizing the machine readable instructions according to method of the present utility model.Thus, the utility model also covers
Lid storage is used to perform the recording medium of the program according to method of the present utility model.
Description of the present utility model is given for the sake of example and description, and is not exhaustively or by originally
Utility model is limited to disclosed form.Many modifications and variations are for the ordinary skill in the art obvious.
Selection and description embodiment are, in order to more preferably illustrate principle of the present utility model and practical application, and to make the common skill of this area
Art personnel are it will be appreciated that the utility model is suitable to the various embodiments with various modifications of special-purpose so as to design.
Claims (10)
1. a kind of body impedance measurement devices, it is characterised in that including：
Detecting electrode unit, measuring circuit unit, analog switch unit and signal gathering unit；
The detecting electrode unit is connected with the measuring circuit unit, the measuring circuit unit by analog switch unit with
The signal gathering unit connection；The detecting electrode unit and human contact, for exporting detection electric current；The measuring circuit
Operational amplifier is provided with unit, for being amplified treatment to the detection electric current.
2. device as claimed in claim 1, it is characterised in that：
Measuring circuit unit includes：First measuring circuit；First measuring circuit includes：First operational amplifier；
First detecting electrode unit is connected with the positive input terminal of first operational amplifier, first operational amplifier it is defeated
Go out end to be connected with the analog switch unit by circuit, negative input end and the circuit of first operational amplifier connect
Connect.
3. device as claimed in claim 2, it is characterised in that：
The 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 first measuring circuits and the right hand detecting electrode unit and right crus of diaphragm detecting electrode unit are for one by one
It is correspondingly arranged.
4. device as claimed in claim 1 or 2, it is characterised in that：
The measuring circuit unit includes：Second measuring circuit；Second measuring circuit includes：Second operational amplifier,
One resistance, second resistance, the first analog switch；
Second detecting electrode unit is connected with the positive input terminal of second operational amplifier, the first resistor and described second
Resistant series, form the first sub-circuit, and the output end of second operational amplifier is opened by the second sub-circuit with the simulation
Close unit connection；One end ground connection of first sub-circuit, the other end is connected with the second sub-circuit；In first sub-circuit
It is upper and first switch branch road is drawn between the first resistor and second resistance, on first sub-circuit and it is located at
Second switch branch road is drawn between the tie point on the second resistance and the first sub-circuit and the second sub- road；
One end of first analog switch is connected with the negative input end of second operational amplifier, the other end and described first
Switching branches or second switch branch road are connected.
5. device as claimed in claim 4, it is characterised in that：
The second detecting electrode unit includes：Left hand detecting electrode unit and left foot detecting electrode unit；Second measuring circuit
Quantity be 2,2 second measuring circuits and the left hand detecting electrode unit and left foot detecting electrode unit are for one by one
It is correspondingly arranged.
6. device as claimed in claim 1, it is characterised in that：
The detecting electrode unit includes：First detecting electrode, the second detecting electrode；
First detecting electrode and second detecting electrode all with human contact, first detecting electrode output measurement electricity
Stream, the second detecting electrode acquisition testing signal simultaneously exports the detection electric current.
7. device as claimed in claim 6, it is characterised in that including：
Sinusoidal detection signal generator module；The sinusoidal signal generator module is produced and is applied on first detecting electrode
Sinusoidal waveform measurement electric current.
8. device as claimed in claim 7, it is characterised in that including：
The frequency of the measurement electric current includes：1kHz、5kHz、50kHz、250kHz、500kHz、1000kHz.
9. a kind of 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 the detecting electrode unit is 4；
Wherein, 2 detecting electrode units are fixed on the holding handle of bioelectrical impedance analysis instrument, 2 detecting electrode lists
Unit is fixed on the pedal of bioelectrical impedance analysis instrument.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620800136.5U CN206183266U (en) | 2016-07-27 | 2016-07-27 | Human impedance measuring device and human body component analyzer thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620800136.5U CN206183266U (en) | 2016-07-27 | 2016-07-27 | Human impedance measuring device and human body component analyzer thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106137192A (en) * | 2016-07-27 | 2016-11-23 | 北京四海华辰科技有限公司 | A kind of body impedance measurement devices and bioelectrical impedance analysis instrument thereof |
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2016
- 2016-07-27 CN CN201620800136.5U patent/CN206183266U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106137192A (en) * | 2016-07-27 | 2016-11-23 | 北京四海华辰科技有限公司 | A kind of body impedance measurement devices and bioelectrical impedance analysis instrument thereof |
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