CN107174245A - Tissue measurement method of parameters and measuring instrument - Google Patents
Tissue measurement method of parameters and measuring instrument Download PDFInfo
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- CN107174245A CN107174245A CN201610141185.7A CN201610141185A CN107174245A CN 107174245 A CN107174245 A CN 107174245A CN 201610141185 A CN201610141185 A CN 201610141185A CN 107174245 A CN107174245 A CN 107174245A
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- voltage signal
- tissue parameter
- tissue
- driving voltage
- exciting electrode
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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
- 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
Abstract
The invention discloses a kind of tissue measurement method of parameters and measuring instrument, methods described includes：To application skin surface exciting electrode to apply driving voltage signal；Obtain under the driving voltage signal, flow through the current value of the exciting electrode pair；According to the driving voltage signal, the tissue parameter computation model of the current value and setting calculates tissue parameter value, wherein, the tissue parameter computation model is built by the conductive characteristic of human body different tissues.The measuring method can simply and accurately measure the organizational parameter that human body sets position, and the measuring method cost of implementation is low, smaller by external environment influence, greatly improve Consumer's Experience.
Description
Technical field
The present embodiments relate to circuit engineering, more particularly to a kind of tissue measurement method of parameters and measurement
Instrument.
Background technology
With the development of the social economy, people's living standard is significantly improved, but this also causes fertilizer
Fat phenomenon is more and more universal, and the health problem triggered by obesity turns into the focus of social concerns.In recent years,
Determination of Total Body Fat percentage receives much concern as one of index of health status for knowing measured.However,
It not can determine that Fat Distribution, in which position of body, can not also be determined based on Determination of Total Body Fat percentage
The fat thickness at some position of body is how many on earth.Research shows that subcutaneous fat is the main of body fat
Part, therefore, measurement subcutaneous fat thickness turn into the availability indexes for estimating body fat situation, in addition,
Privileged site subcutaneous fat thickness is measured can also provide effective reference frame for body-shaping slimming.
At present, the common method of measurement fat thickness mainly has fatty slide calliper rule method, photoelectric detection method, ultrasonic wave
Detection method etc..However, fatty slide calliper rule dynamics is difficult to hold, it is necessary to which professional person could accurately measure；Photoelectricity
Detection method is easily influenceed by external factor such as ambient light and skin colors；And ultrasonic Detection Method can not be fatty thick
Spending hour accurately measures, and expensive；Thus these three methods are all unfavorable for carrying out.
The content of the invention
The present invention provides a kind of tissue measurement method of parameters and measuring instrument.Simply and accurately to measure people
Body sets the tissue parameter at position.
In a first aspect, the embodiments of the invention provide a kind of tissue measurement method of parameters, this method includes：
To application skin surface exciting electrode to apply driving voltage signal；
Obtain under the driving voltage signal, flow through the current value of the exciting electrode pair；
According to the driving voltage signal, the tissue parameter computation model of the current value and setting,
Tissue parameter value is calculated, wherein, the tissue parameter computation model passes through human body different tissues
Conductive characteristic is built.
It is preferred that, the tissue parameter computation model is specifically included：The circuit being made up of basic component
Model；
Wherein, the basic component includes：Resistance, electric capacity and inductance；The tissue parameter is calculated
The conductive features that the selection of basic component described in model passes through the tissue between the exciting electrode pair
It is determined that.
Exemplarily, the type of the tissue parameter is body fat thickness；
The tissue parameter computation model includes：By fatty electric capacity corresponding with fat thickness and at least
The circuit model that Liang Ge human bodies tissue impedance is constituted.
Further, specifically included to exciting electrode of the application in skin surface to applying driving voltage signal：
To being attached to the exciting electrode of skin surface to applying at least three ac voltage signals, wherein, difference is handed over
Stream voltage signal has different signal frequencies；
Accordingly, according to the driving voltage signal, the tissue parameter meter of the current value and setting
Model is calculated, tissue parameter value is calculated and specifically includes：
According to the impedance operator of the tissue parameter computation model, at least three ac voltage signal
And distinguish the corresponding current value from different ac voltage signals, calculate the fatty capacitance；
According to the inversely prroportional relationship of fatty electric capacity and fat thickness, the body fat thickness value is calculated.
Further, specifically included to exciting electrode of the application in skin surface to applying driving voltage signal：
To ac voltage signal of the exciting electrode to one setpoint frequency of application for being attached to skin surface；
Accordingly, according to the driving voltage signal, the tissue parameter meter of the current value and setting
Model is calculated, tissue parameter value is calculated and specifically includes：
Believed according to the alternating voltage of the impedance operator of the tissue parameter computation model, the setpoint frequency
Number and the current value corresponding with the ac voltage signal of the setpoint frequency, calculate the fatty electric capacity
Value, wherein, at least two tissues impedance is measure constant；
According to the inversely prroportional relationship of fatty electric capacity and fat thickness, the body fat thickness value is calculated.Enter one
Step ground, methods described also includes：Obtain the measuring point of user's input, and/or tissue measurement type；
Corresponding tissue parameter is chosen according to the measuring point, and/or the tissue measurement type
Computation model.
Second aspect, the embodiment of the present invention additionally provides a kind of tissue parameter measurement instrument, the measuring instrument bag
Include：
Processor, signal drive module, at least one set of exciting electrode are to, inspection leakage resistance and current detecting mould
Block；Wherein：
The processor is connected with the signal drive module, for synthesizing driving voltage signal, and will synthesis
The driving voltage signal afterwards is sent to the signal drive module；
The signal drive module with the exciting electrode to being connected, for by the driving voltage received
Signal is amplified after driving, puts on application in the exciting electrode of skin surface to upper；
The inspection leakage resistance is connected with the signal drive module, for the electricity to flowing through the exciting electrode pair
Flow valuve is sampled indirectly；
The current detection module is connected with the inspection leakage resistance and the processor, and institute is flowed through for obtaining
State the sample rate current of inspection leakage resistance and send to the processor；
The processor is additionally operable to：According to the sample rate current, the electric current for flowing through the exciting electrode pair is obtained
Value；
According to the driving voltage signal, the tissue parameter computation model of the current value and setting,
Tissue parameter value is calculated, wherein, the tissue parameter computation model passes through human body different tissues
Conductive characteristic is built.
Further, the type of the tissue parameter is body fat thickness；
The tissue parameter computation model includes：By fatty electric capacity corresponding with the fat thickness and
The circuit model that at least two tissue impedances are constituted.
Exemplarily, the processor specifically for：
At least three driving voltage signals are synthesized, and the driving voltage signal after synthesis is sent to described
Signal drive module, wherein, different ac voltage signals have different signal frequencies；
Receive what the current detection module was returned, sample rate current corresponding from different ac voltage signals；
According to the sample rate current, the current value for flowing through the exciting electrode pair is obtained；
According to the impedance operator of the tissue parameter computation model, at least three ac voltage signal
And distinguish the corresponding current value from different ac voltage signals, calculate the fatty capacitance；
According to the inversely prroportional relationship of fatty electric capacity and fat thickness, the body fat thickness value is calculated.
Exemplarily, the processor specifically for：
The driving voltage signal of a setpoint frequency is synthesized, and the driving voltage signal after synthesis is sent
To the signal drive module；
Receive what the current detection module was returned, it is corresponding with the driving voltage signal of the setpoint frequency to adopt
Sample electric current；
According to the sample rate current, the current value for flowing through the exciting electrode pair is obtained；
Believed according to the alternating voltage of the impedance operator of the tissue parameter computation model, the setpoint frequency
Number and the current value corresponding with the ac voltage signal of the setpoint frequency, calculate the fatty electric capacity
Value, wherein, at least two tissues impedance is measure constant；
According to the inversely prroportional relationship of fatty electric capacity and fat thickness, the body fat thickness value is calculated.
Further, the processor is additionally operable to：Synthesize for stimulating the massage voltage signal of muscle and nerve,
And send the massage voltage signal after synthesis to the signal drive module；
The signal drive module is additionally operable to：The massage voltage signal received is amplified after driving,
Application is put in the exciting electrode of skin surface to upper.
Further, the measuring instrument, in addition to：Wireless module and power module；
Wherein, the wireless module is connected with the processor, for realizing the processor and terminal device
Carry out data interaction；
The power module is used to be powered for the processor and modules in the measuring instrument.
The present invention to exciting electrode of the application in skin surface to application driving voltage signal, and acquisition by existing
Under the driving voltage signal, the current value of the exciting electrode pair is flowed through, finally according to the driving voltage
The tissue parameter computation model that signal, the current value and the conductive characteristic by different tissues are built,
Calculate tissue parameter value.The organizational parameter that human body sets position can be simply and accurately measured, and should
Measuring method cost of implementation is low, smaller by external environment influence, greatly improves Consumer's Experience.
Brief description of the drawings
Fig. 1 is a kind of flow chart for tissue measurement method of parameters that the embodiment of the present invention one is provided；
Fig. 2 is a kind of flow chart for tissue measurement method of parameters that the embodiment of the present invention two is provided；
Fig. 3 is a kind of structural representation for capacity plate antenna that the embodiment of the present invention two is provided；
Fig. 4 is a kind of capacitance structure schematic diagram for tissue that the embodiment of the present invention two is provided；
Fig. 5 is the human body circuit loop schematic diagram that the embodiment of the present invention two is provided；
Fig. 6 is the human body circuit loop equivalent circuit diagram one that the embodiment of the present invention two is provided；
Fig. 7 is the human body circuit loop equivalent circuit diagram two that the embodiment of the present invention two is provided；
Fig. 8 is the human body circuit loop equivalent circuit diagram three that the embodiment of the present invention two is provided；
Fig. 9 is the human body circuit loop equivalent circuit diagram four that the embodiment of the present invention two is provided；
Figure 10 is the human body circuit loop equivalent circuit diagram five that the embodiment of the present invention two is provided；
Figure 11 is a kind of structural representation for tissue parameter measurement instrument that the embodiment of the present invention four is provided.
Embodiment
The present invention is described in further detail with reference to the accompanying drawings and examples.It is understood that this
The specific embodiment of place description is used only for explaining the present invention, rather than limitation of the invention.Also need in addition
It is noted that illustrate only part related to the present invention for the ease of description, in accompanying drawing and not all knot
Structure.
It should be mentioned that some exemplary embodiment quilts before exemplary embodiment is discussed in greater detail
It is described as processing or the method described as flow chart.Although every step is described as the place of order by flow chart
Reason, but many of which step can be implemented concurrently, concomitantly or simultaneously.In addition, every step
Rapid order can be rearranged.When its step is completed, the processing can be terminated, it is also possible to
With the additional step being not included in accompanying drawing.The processing can correspond to method, function, code, son
Routine, subprogram etc..
For the ease of follow-up understanding, the realization principle of the present invention is briefly described first.In general,
The moisture of free state is electrolyte water in the electrolyte of ionic conduction, the body fluid of people in different groups in human body
Being unevenly distributed in knitting, because thering is abundant blood vessel to be full of electrolyte in skin and intramuscular, therefore
The conductance of skin and muscle is higher, and the water of free state is less in fat, therefore relatively low lead can be presented in fat
Electric rate.Therefore, if applying voltage signal on human body, different resistances can be presented in the different tissues of human body
Anti- characteristic, i.e.,：Can be human body organizational parameter by the body-tissue equivalent in the voltage signal loop applied
Computation model, for example, skin and muscle can be equivalent into resistance, fat is equivalent to electric capacity, passes through meter
The numerical value (for example, resistance value or capacitance etc.) of each circuit element in tissue computation model is calculated,
The measurement to tissue parameter can be realized indirectly.Typically, can by calculating obtained dermatopolyneuritis
With so obtain the human body organizational parameter such as moisture content of skin, by calculating obtained fatty electric capacity, can with and then
Obtain the human body organizational parameter such as fat thickness value.
I.e.：In various embodiments of the present invention, creative proposition：According to the conductive characteristic of human body different tissues
Tissue phantom is built, by applying voltage signal on position to be measured, and corresponding current value is obtained,
Can calculate in applied ac signal loop by the corresponding circuit components value of tissue parameter,
And then required tissue parameter can be measured.
Embodiment one
Fig. 1 is a kind of flow chart for tissue measurement method of parameters that the embodiment of the present invention one is provided, this reality
Example is applied to be applicable to measure tissue parameter；This method can be performed by tissue parameter measuring apparatus,
Described device can be integrated in tissue parameter measurement instrument specially to measure tissue parameter, Huo Zheye
It can be integrated in electronic massage device to extend the existing capability of electronic massage device.Referring to Fig. 1, methods described
Specifically include following steps：
Step 110, to application skin surface exciting electrode to apply driving voltage signal.
As it was previously stated, in order to measure tissue parameter, it is necessary to apply voltage to the skin surface of human body first
Signal, accordingly, can be by believing applying driving voltage to exciting electrode of the application in human skin
Number mode realize.
In the present embodiment, it is contemplated that there is the relatively low tissue of electrical conductivity in human body, typically, it is fatty.Cause
This, the driving voltage signal preferably ac voltage signal applied.
Wherein, to improve the conductive characteristic of skin, the skin surface that can be applied in each electrode is applied in advance
Conducting medium is applied, accordingly, when constructing corresponding tissue parameter computation model, it is necessary to consider simultaneously
The equivalent circuit element of conducting medium.Wherein, the conducting medium can be Signa Gel, conductive tape,
Conductive glue or conductive rubber etc. other can improve the medium of conductive characteristic.
Wherein, the application is not limited in the quantity of the exciting electrode pair of skin surface, can is a pair, also may be used
To be multipair, azygous odd number can also be, such as 3,5 etc., but cannot be independent 1
It is individual, meanwhile, the exciting electrode must be corresponding, i.e., it is necessary to have a number of exciting electrode with swashing
The positive output end for encouraging voltage signal is connected, and a number of exciting electrode and driving voltage signal is negative in addition
It is connected to output end, all exciting electrodes can not be connected with the same output end of driving voltage signal simultaneously,
For example, when applying when the quantity of the exciting electrode of skin surface is 3, can be with wherein 2 exciting electrodes
It is connected with the positive output end of driving voltage signal, remaining 1 exciting electrode is negative with driving voltage signal
It is connected to output end, or wherein 2 exciting electrodes are connected with the negative sense output end of driving voltage signal, remain
Under 1 exciting electrode be connected with the positive output end of driving voltage signal, as long as 3 exciting electrodes
It is connected i.e. with the same output end (positive output end or negative sense output end) of driving voltage signal when different
Can.
Step 120, acquisition flow through the current value of the exciting electrode pair under the driving voltage signal.
When driving voltage signal is applied to exciting electrode pair of the application in skin surface, then exciting electrode pair with
Tissue forms human body circuit loop, by obtaining under the driving voltage signal, flows through described sharp
The current value of electrode pair is encouraged, is prepared to calculate related body's organizational parameter.
Step 130, according to the driving voltage signal, the tissue parameter of the current value and setting
Computation model, calculates tissue parameter value, wherein, the tissue parameter computation model passes through human body
The conductive characteristic of different tissues is built.
As it was previously stated, by the way that the different tissues of human body to be equivalent to different circuit elements, can construct described
The tissue parameter computation model for the human body circuit loop that exciting electrode pair is formed with tissue.
One of the present embodiment preferred embodiment in, the tissue parameter computation model is specifically wrapped
Include：The circuit model being made up of basic component；
Wherein, the basic component includes：Resistance, electric capacity and inductance；The tissue parameter is calculated
The conductive features that the selection of basic component described in model passes through the tissue between the exciting electrode pair
It is determined that.In general, the tissue parameter that the conductive characteristic by human body different tissues is built is calculated
(resistance value or capacitance etc.) containing how many unknown quantity in model, can by application in skin table
The exciting electrode in face is obtained corresponding many from different driving voltage signals to repeatedly applying driving voltage signal
Individual current value, constructs equation with many unknowns group, final tissue parameter is obtained by the method for solving equations,
For the ease of calculating, the multiple ac voltage signal can preferably have different frequency values and identical
Magnitude of voltage.
A kind of tissue measurement method of parameters that the present embodiment is provided, passes through the swashing in skin surface to application
Encourage electrode pair and apply driving voltage signal, and obtain under the driving voltage signal, flow through the excitation electricity
Extremely to current value, finally according to the driving voltage signal, the tissue of the current value and setting
Parameter computation model, calculates tissue parameter value, wherein, the tissue parameter computation model passes through
The conductive characteristic of human body different tissues is built.So as to simply and accurately measure the group that human body sets position
Parameter is knitted, and the measuring method cost of implementation is low, it is smaller by external environment influence, greatly improve user's body
Test.
On the basis of the various embodiments described above, the method for the present embodiment can also include：
Obtain the measuring point of user's input, and/or tissue measurement type；
Corresponding tissue parameter is chosen according to the measuring point, and/or the tissue measurement type
Computation model.
In the preferred embodiment, can according to exciting electrode to application site (for example；Belly, hand,
Leg etc.) different human body tissue characteristics, construct different tissue parameter computation models；Can also root
According to the difference (for example, fatty capacitance, moisture content of skin etc.) of tissue measurement type, construct different
Tissue parameter computation model, the present embodiment is to this and is not limited.
Typically, the measuring point that can be actually entered according to user, and/or tissue measurement type, choosing
Corresponding tissue parameter computation model is taken, the measurement to required tissue parameter is completed.
The benefit so set is：Calculated by further refining the tissue parameter under different measurement demands
Model, can cause measurement result more to enrich, and further increase the degree of accuracy of measurement.
Embodiment two
Fig. 2 is a kind of flow chart for tissue measurement method of parameters that the embodiment of the present invention two is provided, in reality
Apply on the basis of example one, the present embodiment has carried out further optimization, by the type of the tissue parameter of measurement
Specifically it is optimized for body fat thickness；Meanwhile, the quantity of the exciting electrode pair is specifically optimized for two.
I.e.：One exciting electrode is connected with the positive output end of driving voltage signal, another exciting electrode and excitation
The negative sense output end of voltage signal is connected.
Accordingly, the tissue parameter computation model is specifically included：By fat corresponding with fat thickness
The circuit model that electric capacity and at least two tissue impedances are constituted.
In order to make it easy to understand, being summarized as follows to the construction process of the tissue parameter computation model：
As it was previously stated, conductance is higher full of electrolyte for skin and the muscle blood vessel abundant because including, and fat
The water of free state is less therefore relatively low conductance is presented in fat tissue, because fat is between skin and muscle,
Therefore the capacity plate antenna in electrophysics can be analogous to, the structure of capacity plate antenna can be participated in shown in Fig. 3, its
In, 101,102 represent that area is S conducting plate up and down respectively, and the calculation formula of capacity plate antenna is
Wherein, ε represents dielectric constant, and S is the area of conducting plate, and d is the distance between conducting plate up and down.
Human body skin, subcutaneous fat also have similar structure with muscle, referring to Fig. 4, skin 201 and muscle 202
Conducting plate above and below being respectively, middle fat 203 is then the dielectric of resistance very little, fat 203
Thickness then correspond to the distance between conducting plate in capacity plate antenna.According to the calculation formula of electric capacity, two
Individual area is in S conducting plate capacitance structure, its capacitance is inversely proportional with the distance between conducting plate
's.As shown in Figure 4, it is clear that if the size of this electric capacity can be measured, it just can indirectly calculate and obtain fat
203 thickness.
It should be noted that described by fatty electric capacity corresponding with fat thickness and at least two tissues
The determination principle for the circuit model that impedance is constituted：
When the ac voltage signal of certain frequency be applied to exciting electrode to when, that is, form such as Fig. 5 institutes
The human body circuit loop shown, wherein, exciting electrode is to being respectively 305 and 306, and exciting electrode is to 305 Hes
306 conducting medium with being applied on the contact surface of skin 303 is 304 and 307, conducting medium 304 and 307
The featured resistance of itself is defined as R1a and R1b.When the ac voltage signal of certain frequency is applied to electrode 305
With 306 on when, because circuit model is symmetrical, thus from the point of view of electrode 305, by conduction Jie
The electric current of matter 304 is divided into two-way：Electric current penetrates skin 303 and is coupled to through distribution capacity on muscle 301 all the way,
The featured resistance of corresponding skin 303 is defined as R2a and R2b；Another road electric current is directly in the He of electrode 305
The internal flow of skin 302 between 306, corresponding featured resistance is defined as R5.
The adipose tissue 302 of the lower section of electrode 305 and 306 is not complete insulator, there is electrolyte and leads
Electrical characteristics, in the place away from electrode 305 and 306, there is also conductive tissue, both conductive shapes in addition
The corresponding featured resistance of state is defined as inside R3a and R3b, the fat 302 of the lower section of electrode 305 and 306
There is Leakage Current, corresponding featured resistance is defined as R6 and R7, this resistance is with respect to other electrolyte features
Resistance, resistance compares larger.The skin 303 of the lower section of electrode 305 and 306, fat 302 and deep layer
Muscle 301 constitutes the characteristic capacitance C1a and C1b that the present invention is paid close attention to.It is applied on electrode 305 and 306
Certain frequency ac current signal after fat 302 is penetrated, can shape in electrolyte in muscle 301
Into electric current, corresponding featured resistance is defined as R8.
By above-mentioned each characteristic electron original paper extract and it is regular after, pure electricity as shown in Figure 6 can be obtained
Road model.Then, the circuit model according to resistance connection in series-parallel characteristics simplified Fig. 6, from shown in Fig. 6
In circuit diagram, it can be seen that the structure of circuit is symmetrical, thus C1b and C1a value is equal, and
Fatty electric capacity C1 value is the 1/2 of C1a and C1b, as long as therefore the value of obtaining C1a can obtain C1, and
C1a can be calculated from the half circuit model of the left side.In order to make it easy to understand, by R5 in Fig. 6, R6,
R7 and R8 are divided into equal two parts, and half therein is respectively defined as R5a, R6a, R7a and R8a,
Then, the circuit reduction shown in Fig. 6 is the circuit shown in Fig. 7, referring to Fig. 7, it is determined that under input condition,
The electric current i1 for flowing through R1a is divided into two-way i2 and i3, because i1 includes i2, is being not concerned with the numerical value of resistance,
In the case of only focusing on circuit structure, as shown in figure 8, because the electric current between the road of two-way electric current is 0,
The path of dotted line is also just not present.R1a can be replaced using equivalent two resistance R1aa and R1ab,
Ra in circuit as shown in Figure 9, figure can be obtained with abbreviation to be obtained by R1aa and R5a series connection, Rb is by R1ab
Obtained with R2a series connection.Using the method, merge other series connection and the active component in parallel shown in Fig. 9,
Simplification circuit as shown in Figure 10 may finally be obtained.In Figure 10, it is right that R2 represents all electrolyte conductions
The resistance answered；Muscle, skin in the capacitance current loop that R1 is then skin, fat and muscle are constituted
With the equivalent series resistance of the part such as conducting medium；C1 is the equivalent capacity of above-mentioned C1a and C1b series connection.
Under conditions of size, material and the constant spacing of exciting electrode, it is clear that electric capacity C1 size and the thickness of fat
There is also inverse relation for degree.
According to circuit base knowwhy, following fatty electric capacity computation model can be obtained from Figure 10：
Wherein：UabIt is consequently exerted at magnitude of voltage of the exciting electrode to upper ac voltage signal, IabIt is to measure
To the current value for flowing through exciting electrode pair；S=j* ω, ω are the signal frequencies of ac voltage signal；R1 tables
Levy the resistance of conducting medium, muscle, skin；R2 characterizes muscle, the conductive bypass separator resistance of skin, and C1 is
Fatty capacitance.
The ac voltage signal of input different frequency is can be seen that from above-mentioned fatty electric capacity computation model, due to
Distribution capacity C1 presence, can obtain the electric current I for flowing through exciting electrode pair that is of different sizes and can measuringab。
UabIt is constant voltage, size is fixed.R1, R2, C1 are fixed values.Only s and IabCan be with exchange
The frequency w of voltage signal change and change.Thus, as long as applying the alternating voltage letter of three different frequencies
Number, you can obtain three equation with three unknowns formula (wherein Iab、Uab, s size all, it is known that R1, R2, C1 not
Know), it is that can obtain R1, R2, C1 by basic equation with three unknowns formula method for solving.
Referring to Fig. 2, based on as above analyzing, the method for the present embodiment specifically may include steps of：
Step 210, to being attached to the exciting electrode of skin surface to applying at least three ac voltage signals, its
In, different ac voltage signals have different signal frequencies.
Step 220, acquisition flow through the current value of the exciting electrode pair under the driving voltage signal.
Step 230, the impedance operator according to the tissue parameter computation model, described at least three hand over
Flow voltage signal and distinguish the corresponding current value from different ac voltage signals, calculate the fat electricity
Capacitance；Wherein, at least three ac voltage signal has different frequency and identical magnitude of voltage.
Above-mentioned steps are specifically as follows：According to the ac voltage signal of three different frequencies, described three
Current value and the body fat electric capacity computation model, construct equation with three unknowns group；
By solving the equation with three unknowns group, the fatty capacitance is calculated.
Step 240, the inversely prroportional relationship according to fatty electric capacity and fat thickness, calculate the body fat thick
Angle value.
It is preferred that, fat thickness value can be calculated according to equation below：
Wherein k is setting empirical, can be measured by way of experiment, and k and electrode area into
Proportional relation.C1 is fatty capacitance, can be calculated according to step 230, and T is fat thickness value.
The tissue measurement method of parameters that the present embodiment is provided, it is special according to the conduction of human body different tissues first
Property construct body fat electric capacity computation model, by application skin surface exciting electrode to apply three
The ac voltage signal of individual different frequency, and obtain respectively under different ac voltage signals, flow through the excitation
Multiple current values of electrode pair, according to the multiple ac voltage signal, the multiple current value and described
Fatty electric capacity computation model, calculates fatty capacitance, and the fatty capacitance obtained by calculating calculates fat
Thickness value, so as to simply and accurately measure the fat thickness that human body sets position, and the measuring method
Cost of implementation is low, and smaller by external environment influence, and this method does not have the influence of operating force, can be square
Just user observes the fat thickness of itself at any time, greatly improves Consumer's Experience.
On the basis of the various embodiments described above, it will can swash to exciting electrode of the application in skin surface to applying
Voltage signal is encouraged specifically to be optimized for：To being attached to the exciting electrode of skin surface to applying the friendship of a setpoint frequency
Flow voltage signal；
Accordingly, can be by according to the driving voltage signal, the tissue of the current value and setting
Parameter computation model, calculates tissue parameter value and is specifically optimized for：
Believed according to the alternating voltage of the impedance operator of the tissue parameter computation model, the setpoint frequency
Number and the current value corresponding with the ac voltage signal of the setpoint frequency, calculate the fatty electric capacity
Value, wherein, at least two tissues impedance is measure constant；According to fatty electric capacity and fat thickness
Inversely prroportional relationship, calculate the body fat thickness value.
Tissue parameter computation model is specifically being optimized for circuit model as described in Figure 10, and for not
After the multiple test that body fat thickness is carried out with people, inventor has found：For different people, resistance R1
With resistance R2 difference and little, it therefore, it can by way of repeatedly measuring, determine R1, R2 correspondence
Empirical, therefore, can be only to being attached to skin surface during the determination of fatty electric capacity is carried out
Exciting electrode to applying the ac voltage signal of a setpoint frequency, and obtain and the friendship of the setpoint frequency
After the corresponding current value of stream voltage signal, directly according to formula：
Calculate the occurrence for obtaining fatty electric capacity.Wherein, R1 and R2 is the empirical value that multiple measurement experiment is obtained.
The benefit so set is：The computation complexity of fatty electric capacity is greatly reduced, final fat is saved
The calculating time of thickness value, the real-time for meeting tissue parameter value obtains demand.
Embodiment three
On the basis of the various embodiments described above, the present embodiment has carried out further optimization, by the human body group of measurement
The type for knitting parameter is specifically optimized for body fat thickness；It is 3 by the quantity set of exciting electrode, wherein,
Two exciting electrodes are connected with the positive output end of driving voltage signal, and an exciting electrode is believed with driving voltage
Number negative sense output end be connected.
It is understood that the implementation process base of the implementation process of the present embodiment method and second embodiment method
This is similar, and difference is essentially consisted in because what the positive output end with driving voltage signal was connected swashs for two
Encourage electrode, and be connected with the negative sense output end of driving voltage signal for an exciting electrode, therefore, institute's structure
The tissue parameter computation model made has certain difference.Typically, because the structure of circuit is no longer left
It is right symmetrical, then the Circuit simplication method in embodiment two can not be used to carry out Circuit simplication.
In the present embodiment, can take with the identical human body circuit loop model of embodiment two, such as Fig. 5 institutes
Show, simply human body circuit loop model in the present embodiment no longer has symmetry characteristic, therefore ultimately generates
Tissue parameter computation model needs to introduce extra corrected parameter, the corrected parameter compared with embodiment two
Need the parameters such as the size of the arrangement by electrode, electrode shape to determine to draw, therefore, it can pass through
The mode of many experiments, determines corrected parameter, and then determine corresponding tissue parameter computation model.
It is determined that after tissue parameter computation model in the case of three exciting electrodes, can use and reality
Apply the identical mode of example two and apply ac voltage signal, and obtain current value, and then final calculate obtains human body
Fat thickness.
Certainly, it will be appreciated by persons skilled in the art that can also according to the actual requirements, by exciting electrode
Quantity be set to 4,5 or 6 etc., and construct the human body being consistent with the quantity of exciting electrode
Organizational parameter computation model, wherein, if it is possible to certain circuit reduction is carried out, can be reduced as far as possible final
Unknown quantity in tissue parameter computation model, measuring a small amount of number of times just can finally calculate result；If
Model can not simplify, it is necessary to measure repeatedly to obtain final calculation result.
In actual applications, corresponding human body can be chosen according to the actual use exciting electrode quantity of user
Organizational parameter computation model, and then corresponding tissue parameter is calculated, the benefit so set is：Full
On the premise of the actual exciting electrode usage quantity of sufficient user, the measurement essence of tissue parameter is further improved
Degree.
Example IV
Figure 11 is a kind of structural representation for tissue parameter measurement instrument that the embodiment of the present invention four is provided,
On the basis of above-described embodiment, the measuring instrument is specifically included：
Processor 410, signal drive module 420, at least one set of exciting electrode are to 430, inspection leakage resistance 440
And current detection module 450；Wherein：
Processor 410 is connected with signal drive module 420, for synthesizing driving voltage signal, and will synthesis
The driving voltage signal afterwards is sent to signal drive module 420；Signal drive module 420 and excitation electricity
Extremely it is connected to 430, for the driving voltage signal received to be amplified after driving, puts on deposited
The exciting electrode of skin surface is attached to on 430；Examine leakage resistance 440 and the phase of signal drive module 420
Even, for being sampled indirectly to the current value for flowing through the exciting electrode pair；Current detection module 450 with
Examine leakage resistance 440 and processor 410 is connected, the sample rate current of inspection leakage resistance 440 is flowed through for obtaining simultaneously
Send to processor 410；Processor 410 is additionally operable to：According to the sample rate current, excitation electricity is flowed through in acquisition
Current value extremely to 430；According to the driving voltage signal, the tissue of the current value and setting
Parameter computation model, calculates tissue parameter value, wherein, the tissue parameter computation model passes through
The conductive characteristic of human body different tissues is built.
In the present embodiment, flow through the sample rate current of inspection leakage resistance 440 and be not equal to acquisition and flow through exciting electrode
To 430 current value, but it meets certain proportionate relationship with the current value, therefore, processor 410
, it is necessary to be set to the sample rate current after the sample rate current that current detection module 450 is gathered is obtained
After the enhanced processing of ratio, it could obtain corresponding with driving voltage signal, flow through exciting electrode to 430
Current value.
Exemplarily, the type of the tissue parameter is body fat thickness；
Correspondingly, the tissue parameter computation model includes：By fat corresponding with the fat thickness
The circuit model that electric capacity and at least two tissue impedances are constituted.
Further, processor 410 specifically can be used for：
At least three driving voltage signals are synthesized, and the driving voltage signal after synthesis is sent to described
Signal drive module 420, wherein, different ac voltage signals have different signal frequencies；Receive described
What current detection module 450 was returned, sample rate current corresponding from different ac voltage signals；Adopted according to described
Sample electric current, obtains the current value for flowing through the exciting electrode pair；According to the tissue parameter computation model
Impedance operator, at least three ac voltage signal and from different ac voltage signals distinguish it is corresponding
The current value, calculates the fatty capacitance；According to the inversely prroportional relationship of fatty electric capacity and fat thickness,
Calculate the body fat thickness value.
Further, processor 410 can be specifically additionally operable to：
The driving voltage signal of a setpoint frequency is synthesized, and the driving voltage signal after synthesis is sent
To the signal drive module 420；Receive what the current detection module 450 was returned, with the setting frequency
The corresponding sample rate current of driving voltage signal of rate；According to the sample rate current, the excitation electricity is flowed through in acquisition
Extremely to current value；According to the impedance operator of the tissue parameter computation model, the setpoint frequency
Ac voltage signal and the current value corresponding with the ac voltage signal of the setpoint frequency, calculate institute
Fatty capacitance is stated, wherein, at least two tissues impedance is measure constant；According to fatty electric capacity
With the inversely prroportional relationship of fat thickness, the body fat thickness value is calculated.
On the basis of above-mentioned technical proposal, processor 410 can be also used for：Synthesize for stimulate muscle and
The massage voltage signal of nerve, and by the massage voltage signal after synthesis to signal drive module 420；
Correspondingly, signal drive module 420 can be also used for：The massage voltage signal received is entered
After row amplification driving, application is put in the exciting electrode of skin surface to upper, human body is massaged.
Further, the measuring instrument can also include display module, be connected with processor 410, be used for showing
Fat thickness information of the family before and after massage, now processor 410 can be also used for realizing closed loop feedback, enter
The feedback check of row massage effect, while user can be visually known the fatty feelings cut self by massage
Condition, lifts Consumer's Experience.
On the basis of above-mentioned technical proposal, the measuring instrument can also include wireless module 460 and power supply mould
Block 470；
Wherein, wireless module 460 is connected with processor 410, for realizing processor 410 and terminal device
Data interaction is carried out, the distant control function to the measuring instrument by terminal device can be achieved；It is preferred that, it is described
Terminal device can be the mobile terminals such as mobile phone, and now mobile terminal device can substitute display described above
Module, it is user-friendly.
Power module 470 is used to be powered for the processor 410 and modules in the measuring instrument.
The human body that the present embodiment is provided synthesizes driving voltage signal in organizational parameter measuring instrument by processor,
And the driving voltage signal after synthesis is put on into application in the described sharp of skin surface by signal drive module
Encourage in electrode pair；Flow through multiple current values of electrode pair by current detection module measurement, and by the electric current
Value is sent to processor, processor finally according to the multiple ac voltage signal, the multiple current value with
And tissue parameter computation model, calculate tissue parameter.Therefore, the measuring instrument can be accurately fast
Tissue parameter is measured fastly, and also carries the function of electric massage, is user-friendly.
Further, the technical scheme of the present embodiment can realize that low cost improves existing electronic massage device, real
Existing massage weight-reducing and fat thickness detection, is such equipment belt to show the New function of closed loop feedback, it is possible to achieve press
The handshake for effect of rubbing.
The said goods can perform the method that any embodiment of the present invention is provided, and possess the corresponding work(of execution method
Can module and beneficial effect.
Note, above are only presently preferred embodiments of the present invention and institute's application technology principle.Those skilled in the art
It will be appreciated that the invention is not restricted to specific embodiment described here, can enter for a person skilled in the art
Row it is various it is obvious change, readjust and substitute without departing from protection scope of the present invention.Therefore, though
So the present invention is described in further detail by above example, but the present invention be not limited only to
Upper embodiment, without departing from the inventive concept, can also include other more equivalent embodiments,
And the scope of the present invention is determined by scope of the appended claims.
Claims (12)
1. a kind of tissue measurement method of parameters, it is characterised in that including：
To application skin surface exciting electrode to apply driving voltage signal；
Obtain under the driving voltage signal, flow through the current value of the exciting electrode pair；
According to the driving voltage signal, the tissue parameter computation model of the current value and setting,
Tissue parameter value is calculated, wherein, the tissue parameter computation model passes through human body different tissues
Conductive characteristic is built.
2. according to the method described in claim 1, it is characterised in that the tissue parameter computation model
Specifically include：The circuit model being made up of basic component；
Wherein, the basic component includes：Resistance, electric capacity and inductance；The tissue parameter is calculated
The conductive features that the selection of basic component described in model passes through the tissue between the exciting electrode pair
It is determined that.
3. method according to claim 2, it is characterised in that the type of the tissue parameter is
Body fat thickness；
The tissue parameter computation model includes：By fatty electric capacity corresponding with fat thickness and at least
The circuit model that Liang Ge human bodies tissue impedance is constituted.
4. method according to claim 3, it is characterised in that electric in the excitation of skin surface to application
Extremely specifically included to applying driving voltage signal：
To being attached to the exciting electrode of skin surface to applying at least three ac voltage signals, wherein, difference is handed over
Stream voltage signal has different signal frequencies；
Accordingly, according to the driving voltage signal, the tissue parameter meter of the current value and setting
Model is calculated, tissue parameter value is calculated and specifically includes：
According to the impedance operator of the tissue parameter computation model, at least three ac voltage signal
And distinguish the corresponding current value from different ac voltage signals, calculate the fatty capacitance；
According to the inversely prroportional relationship of fatty electric capacity and fat thickness, the body fat thickness value is calculated.
5. method according to claim 3, it is characterised in that electric in the excitation of skin surface to application
Extremely specifically included to applying driving voltage signal：
To ac voltage signal of the exciting electrode to one setpoint frequency of application for being attached to skin surface；
Accordingly, according to the driving voltage signal, the tissue parameter meter of the current value and setting
Model is calculated, tissue parameter value is calculated and specifically includes：
Believed according to the alternating voltage of the impedance operator of the tissue parameter computation model, the setpoint frequency
Number and the current value corresponding with the ac voltage signal of the setpoint frequency, calculate the fatty electric capacity
Value, wherein, at least two tissues impedance is measure constant；
According to the inversely prroportional relationship of fatty electric capacity and fat thickness, the body fat thickness value is calculated.
6. according to the method described in claim 1, it is characterised in that also include：
Obtain the measuring point of user's input, and/or tissue measurement type；
Corresponding tissue parameter is chosen according to the measuring point, and/or the tissue measurement type
Computation model.
7. a kind of tissue parameter measurement instrument, it is characterised in that including：Processor, signal drive module,
At least one set of exciting electrode is to, inspection leakage resistance and current detection module；Wherein：
The processor is connected with the signal drive module, for synthesizing driving voltage signal, and will synthesis
The driving voltage signal afterwards is sent to the signal drive module；
The signal drive module with the exciting electrode to being connected, for by the driving voltage received
Signal is amplified after driving, puts on application in the exciting electrode of skin surface to upper；
The inspection leakage resistance is connected with the signal drive module, for the electricity to flowing through the exciting electrode pair
Flow valuve is sampled indirectly；
The current detection module is connected with the inspection leakage resistance and the processor, and institute is flowed through for obtaining
State the sample rate current of inspection leakage resistance and send to the processor；
The processor is additionally operable to：According to the sample rate current, the electric current for flowing through the exciting electrode pair is obtained
Value；
According to the driving voltage signal, the tissue parameter computation model of the current value and setting,
Tissue parameter value is calculated, wherein, the tissue parameter computation model passes through human body different tissues
Conductive characteristic is built.
8. measuring instrument according to claim 7, it is characterised in that the type of the tissue parameter
For body fat thickness；
The tissue parameter computation model includes：By fatty electric capacity corresponding with the fat thickness and
The circuit model that at least two tissue impedances are constituted.
9. measuring instrument according to claim 8, it is characterised in that the processor specifically for：
At least three driving voltage signals are synthesized, and the driving voltage signal after synthesis is sent to described
Signal drive module, wherein, different ac voltage signals have different signal frequencies；
Receive what the current detection module was returned, sample rate current corresponding from different ac voltage signals；
According to the sample rate current, the current value for flowing through the exciting electrode pair is obtained；
According to the impedance operator of the tissue parameter computation model, at least three ac voltage signal
And distinguish the corresponding current value from different ac voltage signals, calculate the fatty capacitance；
According to the inversely prroportional relationship of fatty electric capacity and fat thickness, the body fat thickness value is calculated.
10. measuring instrument according to claim 8, it is characterised in that the processor specifically for：
The driving voltage signal of a setpoint frequency is synthesized, and the driving voltage signal after synthesis is sent
To the signal drive module；
Receive what the current detection module was returned, it is corresponding with the driving voltage signal of the setpoint frequency to adopt
Sample electric current；
According to the sample rate current, the current value for flowing through the exciting electrode pair is obtained；
Believed according to the alternating voltage of the impedance operator of the tissue parameter computation model, the setpoint frequency
Number and the current value corresponding with the ac voltage signal of the setpoint frequency, calculate the fatty electric capacity
Value, wherein, at least two tissues impedance is measure constant；
According to the inversely prroportional relationship of fatty electric capacity and fat thickness, the body fat thickness value is calculated.
11. the measuring instrument according to claim any one of 7-10, it is characterised in that the processor is also
For：Synthesize for stimulating the massage voltage signal of muscle and nerve, and by the massage voltage after synthesis
Signal is sent to the signal drive module；
The signal drive module is additionally operable to：The massage voltage signal received is amplified after driving,
Application is put in the exciting electrode of skin surface to upper.
12. measuring instrument according to claim 7, it is characterised in that also include：Wireless module and electricity
Source module；
Wherein, the wireless module is connected with the processor, for realizing the processor and terminal device
Carry out data interaction；
The power module is used to be powered for the processor and modules in the measuring instrument.
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| CN201610141185.7A CN107174245A (en) | 2016-03-11 | 2016-03-11 | Tissue measurement method of parameters and measuring instrument |
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