CN105262553B - A kind of multiple coupled type human body channel modeling method of the Wearable of Electromagnetic field - Google Patents
A kind of multiple coupled type human body channel modeling method of the Wearable of Electromagnetic field Download PDFInfo
- Publication number
- CN105262553B CN105262553B CN201510736412.6A CN201510736412A CN105262553B CN 105262553 B CN105262553 B CN 105262553B CN 201510736412 A CN201510736412 A CN 201510736412A CN 105262553 B CN105262553 B CN 105262553B
- Authority
- CN
- China
- Prior art keywords
- human body
- wearable
- model
- interface unit
- electromagnetic field
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Near-Field Transmission Systems (AREA)
Abstract
The present invention relates to a kind of multiple coupled type human body channel modeling method of Wearable of Electromagnetic field, the transmission means being combined using capacitively coupled signal, current coupling signal, first set up the electric field model of human body communication, on this basis, the communications portion of Wearable, interelectrode parasitic capacitive impedance, coupling capacitive reactances of actual measurement external environment etc. is equivalent into external circuit model, it is added in electric field model and obtains the model of Electromagnetic field.Ignore each interelectrode parasitic capacitive impedance, external environment present invention improves existing channel modeling method and couple the deficiency of capacitive reactances and Wearable circuit etc., the integrality of perfect modeling, human body channel estimation is carried out using the multiple coupled human body channel modeling method of the Wearable of Electromagnetic field, the truth of actual measurement environment can comprehensively be reflected, the characteristic of channel goodness of fit with real human body is higher.
Description
Technical field
The present invention relates to a kind of multiple coupled type human body channel modeling method of Wearable of Electromagnetic field.
Background technology
Human body communication is the propagation of electrical signals technology with human body as transmission medium, body area network especially medical treatment detection, fortune
The short-distance wireless communication fields such as dynamic monitoring, consumer electronics, soldier's monitoring are with a wide range of applications and market potential.Human body
Be established as follow-up study human body channel capacity, the human body channel of channel model are estimated, design coded system, optimization modulation system etc.
Application and development provides basis.Patent（Application number 200910081416.X）Propose a kind of finite element human body towards human body communication
Modeling method.Partes corporis humani position is carried out that geometry is abstract according to profile nature, the interior geometry of partes corporis humani position is defined, if
The electromagnetic property parameters of partes corporis humani position dielectric layer are put, connection partes corporis humani position forms complete Human-body Finite Element Model.Patent
（Application number 201410281066.2）Propose a kind of human body communication channel modeling method and system based on non-uniform dielectric.By people
Body is divided into multiple structural models and structural model is abstracted into regular geometric body by structure, and dielectric layer is carried out to structural model inside
The equivalent electrical parameter of division, the thickness of each dielectric layer of setting, and computation model.
Human body channel modeling is main based on circuit model and FEM model in above-mentioned patent, is described with equiva lent impedance
Human body channel model, illustrates the signal transfer mechanisms of human body communication, to human body communication apparatus parameter（Configuration, electricity including electrode
The position of pole and carrier frequency etc.）Optimization be it is indispensable, but circuit model can not image announcement extrinsic motivated
Distribution situation of circulation way, electric current or voltage signal of the signal in human body in each layer tissue of human body, can not distinguish
The transmitting effect of different body parts.And although the finite element modeling for being directed to human body channel can be good at rebuilding by transmission telecommunications
Number internal Potential distribution situation for causing, realizes the visualization of signal transmission, but in the actual measuring environment of human body channel, often
Have ignored each interelectrode parasitic capacitive impedance and Wearable circuit, such as Wearable internal signal sources, receiver
Deng influence of the input and output impedance to signal transmission, cause the imperfect of modeling, it is impossible to which reflection actual measurement environment is true comprehensively
Situation, the human body channel characteristic for obtaining measurement is not accurate enough.
In actual measuring environment, complete human body communication system it is main by signal source, send and receive electrode, people
Body Model, receiver composition.The electric signal that signal source is produced injects human body through sender electrode, in receiving terminal, by receiving electrode
Receive signal.Electrode is by the metal material by certain metallic plate for processing or wire and the conduction with electrolyte solution
Glue is formed, and directly and human contact, there is parasitic capacitive impedance between electrode.Interelectrode parasitic capacitive impedance is influence signal
One of key factor of transmission characteristic.When the signal frequency for being input into human body is sufficiently high, the parasitic capacitive impedance between electrode is not
It is negligible.Due to the energy exchange between tester and tested instrument, can to a certain extent change the work of measurand
State, therefore during the instrument such as connecting signal source, receiver, to consider influence of the instrument input and output impedance to accuracy of measurement.
Existing human body channel model often have ignored each interelectrode parasitic capacitive impedance and Wearable circuit,
Such as influence of the input and output impedance of Wearable internal signal sources, receiver to signal transmission, in order to overcome these not
Foot, the present invention devises a kind of multiple coupled type human body channel modeling method of Wearable of Electromagnetic field, by Wearable
Communications portion（Comprising sending module and receiver module）, interelectrode parasitic capacitive impedance, external environment coupling capacitive resistance
It is anti-to wait human external factor equivalent into external circuit model, in conjunction with the human body electric field model of construction, used according to information transfer
Different coupled modes use corresponding field road interface unit, circuit model is combined with electric field model and obtains Electromagnetic field
The multiple coupled type human body channel model of Wearable.
The content of the invention
It is an object of the invention to provide a kind of multiple coupled type human body channel modeling method of Wearable of Electromagnetic field,
The human body channel model of Electromagnetic field is set up in corresponding software, the research such as human body channel estimation, finite element simulation is carried out, can be complete
The truth of face reflection actual measurement environment, accuracy is higher；For the research of the human body characteristic of channel provides more accurate modeling side
Method, the abundant and development to human body communication theory (carrier frequency, coded system, transmission rate etc.) provides foundation.
To achieve the above object, the technical scheme is that：A kind of multiple coupled type people of the Wearable of Electromagnetic field
Body channel modeling method, comprises the following steps,
Step S1：According to the layering rule between human appearance feature and interior tissue, whole body human body or partial body are set up
Model of geometrical features, then respectively organize the corresponding electromagnetism of setting to join to the model of geometrical features of whole body human body or partial body
Number, including electrical conductivity, relative dielectric constant, magnetic conductivity；
Step S2：The communications portion of Wearable includes sending module and receiver module, and wherein sending module is by signal
Source, input impedance composition, receiver module are made up of receiver, output impedance, and consider parasitic appearance between electrode on this basis
Property impedance, external environment coupling capacitive reactances influence, by the communications portion of Wearable, interelectrode parasitic capacitive hinder
The coupling capacitive reactances of anti-, external environment is equivalent into circuit model；
Step S3：Signal transmission form is combined with current coupling using Capacitance Coupled, by equivalent capacitor type road
The electricity that the human body electric field model that interface unit sets up step S1 with equivalent current mode road interface unit is set up with step S2
Road model is combined the multiple coupled type human body channel model of Wearable for constituting Electromagnetic field；
Step S4：The Wearable current mode human body letter of the Electromagnetic field set up as step S3 using Maxwell equations
The governing equation of road model；And geometrical model as the boundary condition of human body channel model is layered using what step S1 set up, with each
Corresponding electromagnetic property is organized as the constitutive relation of human body channel model；Using the analytic method of electromagnetic field, semi analytical method or number
Value method for solving, obtain electric signal transmitted by transmitting terminal to the transmission equation of receiving terminal, calculate path loss, phase offset,
Estimate channel capacity, transmission rate, the bit error rate, and then obtain the multiple coupled type human body channel mould of Wearable of Electromagnetic field
Type.
In an embodiment of the present invention, the model of geometrical features of the whole body human body or partial body includes cylinder, ellipse
The geometrical model of spheroid, cuboid or real human body.
In an embodiment of the present invention, in step s 4, the Maxwell equations：
In formula,It is magnetic field intensity；It is free current density；It is electric displacement vector；It is electric-field intensity；It is magnetic induction intensity；It is charge density.
In an embodiment of the present invention, in step s3, according to capacitor type road interface unit and contact human skin with
It is no, described capacitor type road interface unit is divided into non-contact type road interface unit and contact-type road interface unit.
In an embodiment of the present invention, the Wearable is divided into Wearable A, Wearable B, it is described to wear
Formula device A signal transmission form is worn using Capacitance Coupled transmission means, the Wearable B signal transmission means uses electric current
Coupling transmission system.
In an embodiment of the present invention, the side that the communications portion of the Wearable A is combined with human body electric field model
Formula includes：（1）The communications portion of Wearable A is combined by non-contact type road interface unit with human body electric field model；
（2）The communications portion of Wearable A is combined by contact-type road interface unit with human body electric field model.
Compared to prior art, the invention has the advantages that：Present invention improves existing channel modeling method
Ignore each interelectrode parasitic capacitive impedance, external environment and couple the deficiency of capacitive reactances and Wearable circuit etc., it is complete
It has been apt to the integrality of modeling, human body channel has been carried out using the multiple coupled human body channel modeling method of the Wearable of Electromagnetic field and is estimated
Meter, can comprehensively reflect the truth of actual measurement environment, and the characteristic of channel goodness of fit with real human body is higher.
Brief description of the drawings
Fig. 1 is the communications portion of Wearable A of the present invention by contact-type road interface unit and human body electric field model
It is combined, the communications portion of Wearable B is combined schematic diagram by current mode road interface unit with human body electric field model.
Fig. 2 is the communications portion of Wearable A of the present invention by non-contact type road interface unit and human body electric field mould
Type is combined, the communications portion of Wearable B is combined signal by current mode road interface unit with human body electric field model
Figure.
Fig. 3 is the multiple coupled type human body channel model schematic of Wearable of Electromagnetic field of the present invention.
In figure：The communications portion of 1- Wearables A, 2- road interface unit, 211- contact-types road interface unit,
212- non-contact types road interface unit, 22- current modes road interface unit, 3- human body electric field models, 4- Wearables B's
Communications portion, the coupling capacitive reactances of 5- external environments, 6- parasitic capacitive impedances.
Specific embodiment
Below in conjunction with the accompanying drawings, technical scheme is specifically described.
As Figure 1-3, the multiple coupled type human body channel modeling method of the Wearable of a kind of Electromagnetic field of the invention.
The electric field model of whole body human body or partial body is constructed first.The model of geometrical features of whole body human body or partial body is set up, should
Human geometry's model can be abstract geometrical model, such as cylinder, spheroid or cuboid etc., or real human body
Geometrical model.It is normal to the corresponding electromagnetic parameter of each tissue setting in human geometry's characteristic model, including electrical conductivity, relative dielectric
Number, magnetic conductivity.Electromagnetic field meets Maxwell equation groups in human body：
In formulaIt is magnetic field intensity；It is free current density；It is electric displacement vector；It is electric-field intensity；It is magnetic induction intensity；It is charge density.
Secondly, the communications portion of Wearable includes sending module and receiver module, wherein sending module by signal source,
Input impedance is constituted, and receiver module is made up of receiver, output impedance, and considers parasitic capacitive resistance between electrode on this basis
The coupling capacitive reactances influence of anti-, external environment, by the communications portion of Wearable, interelectrode parasitic capacitive impedance, outer
The coupling capacitive reactances of boundary's environment is equivalent into circuit model；
Furthermore, by field road interface unit, electric field model is combined with circuit model.Wearable a-signal is transmitted
Mode uses capacitive coupling, whether field road interface unit is divided into contact-type road interface list according to contact human skin
Unit（Fig. 1 modules 211）With non-contact type road interface unit（Fig. 2 modules 212）；Wearable B signal transmission means is used
Current coupling mode, Qi Chang roads interface unit equivalent modules are as shown in Fig. 1 modules 22 and Fig. 2 modules 22.
Finally, using Maxwell equations as the governing equation of field road model；And the whole body human body to set up or partial body
Model of geometrical features as human body channel model boundary condition, using the corresponding electromagnetic property of each tissue as human body channel mould
The constitutive relation of type；Using the analytic method of electromagnetic field, semi analytical method or method of value solving, obtain electric signal and transmitted by transmitting terminal
To the transmission equation of receiving terminal, path loss, phase offset are calculated, estimate channel capacity, transmission rate, the bit error rate, obtained
The multiple coupled type human body channel model of Wearable of Electromagnetic field.
The multiple coupled type human body channel model of Wearable of Electromagnetic field is as shown in figure 3,1 and 4 represent Wearable respectively
The communications portion of device A and the communications portion of Wearable B, wherein Wearable A use capacitively coupled signal transmission side
Formula, Wearable B uses current coupling signal transmission form；212（Or can be using contact-type road interface unit 211）Represent
The field road interface unit of capacitive coupling, this is sentenced as a example by the interface unit of non-contact type road；22 expression current mode roads connect
Mouth unit；6 represent parasitic capacitive impedance；The 5 coupling capacitive reactances for representing external environment；3 represent human body electric field model.
Above is presently preferred embodiments of the present invention, all changes made according to technical solution of the present invention, produced function work
During with scope without departing from technical solution of the present invention, protection scope of the present invention is belonged to.
Claims (4)
1. the multiple coupled type human body channel modeling method of a kind of Wearable of Electromagnetic field, it is characterised in that：Including following step
Suddenly,
Step S1：According to the layering rule between human appearance feature and interior tissue, the several of whole body human body or partial body are set up
What characteristic model, then the model of geometrical features to whole body human body or partial body respectively organize the corresponding electromagnetic parameter of setting, bag
Include electrical conductivity, relative dielectric constant, magnetic conductivity；
Step S2：The communications portion of Wearable includes sending module and receiver module, and wherein sending module is by signal source, defeated
Enter impedance composition, receiver module is made up of receiver, output impedance, and consider parasitic capacitive resistance between electrode on this basis
The coupling capacitive reactances influence of anti-, external environment, by the communications portion of Wearable, interelectrode parasitic capacitive impedance, outer
The coupling capacitive reactances of boundary's environment is equivalent into circuit model；The Wearable is divided into Wearable A, Wearable B；
Step S3：Signal transmission form is combined with current coupling using Capacitance Coupled, by equivalent capacitor type road interface
The circuit mould that the human body electric field model that unit sets up step S1 with equivalent current mode road interface unit is set up with step S2
Type is combined the multiple coupled type human body channel model of Wearable for constituting Electromagnetic field；Wherein, the Wearable a-signal
Transmission means uses Capacitance Coupled transmission means, and the human body for being set up step S1 by equivalent capacitor type road interface unit
Electric field model is combined with the circuit model that step S2 sets up, and the Wearable B signal transmission means uses current coupling
Transmission means, and set up with step S2 by the human body electric field model that equivalent current mode road interface unit sets up step S1
Circuit model be combined；
Step S4：The multiple coupled type human body channel of Wearable of the Electromagnetic field set up as step S3 using Maxwell equations
The governing equation of model；And the whole body human body set up using step S1 or the model of geometrical features of partial body are used as human body channel mould
The boundary condition of type, using each corresponding electromagnetic property of tissue as the constitutive relation of human body channel model；Using the solution of electromagnetic field
Analysis method, semi analytical method or method of value solving, obtain electric signal and are transmitted by transmitting terminal to the transmission equation of receiving terminal, calculate outlet
Footpath loss, phase offset, estimation channel capacity, transmission rate, the bit error rate, and then obtain many couplings of Wearable of Electromagnetic field
Mould assembly human body channel model；
In step s3, according to capacitor type road interface unit and contact human skin whether, described capacitor type road is connect
Mouth unit is divided into non-contact type road interface unit and contact-type road interface unit；
Non-contact type road interface unit is the electrode of Wearable A, formation between external environment and human body skin
Parasitic capacitance；Contact-type road interface unit is the static electricity of the electrode with contact human skin's generation of Wearable A
Electrode potential, electrode polarization resistance and parasitic capacitance；
Described current mode road interface unit is that two electrodes of Wearable B are quiet with what contact human skin produced respectively
Only electrode potential, electrode polarization resistance and parasitic capacitance.
2. the multiple coupled type human body channel modeling method of the Wearable of a kind of Electromagnetic field according to claim 1, its
It is characterised by：The model of geometrical features of the whole body human body or partial body includes cylinder, spheroid, cuboid or true people
The geometrical model of body.
3. the multiple coupled type human body channel modeling method of the Wearable of a kind of Electromagnetic field according to claim 1, its
It is characterised by：In step s 4, the Maxwell equations：
In formula,It is magnetic field intensity；It is free current density；It is electric displacement vector；
It is electric-field intensity；It is magnetic induction intensity；It is charge density.
4. the multiple coupled type human body channel modeling method of the Wearable of a kind of Electromagnetic field according to claim 1, its
It is characterised by：The communications portion of the Wearable A includes with the mode that human body electric field model is combined：（1）Wearable sets
The communications portion of standby A is combined by non-contact type road interface unit with human body electric field model；（2）Wearable A's is logical
Letter part is combined by contact-type road interface unit with human body electric field model.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510736412.6A CN105262553B (en) | 2015-11-03 | 2015-11-03 | A kind of multiple coupled type human body channel modeling method of the Wearable of Electromagnetic field |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510736412.6A CN105262553B (en) | 2015-11-03 | 2015-11-03 | A kind of multiple coupled type human body channel modeling method of the Wearable of Electromagnetic field |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105262553A CN105262553A (en) | 2016-01-20 |
| CN105262553B true CN105262553B (en) | 2017-07-04 |
Family
ID=55102083
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510736412.6A Active CN105262553B (en) | 2015-11-03 | 2015-11-03 | A kind of multiple coupled type human body channel modeling method of the Wearable of Electromagnetic field |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105262553B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106297516A (en) * | 2016-09-28 | 2017-01-04 | 深圳先进技术研究院 | A kind of lipids detection modeling method and device |
| CN106375029B (en) * | 2016-11-19 | 2019-01-18 | 福州大学 | A kind of current coupling type human body communication transceiver aided design system and method |
| CN106972901B (en) * | 2017-03-07 | 2020-06-12 | 福州大学 | Wearable device human body channel modeling method based on multilayer transmission line model |
| CN110033684B (en) * | 2019-05-14 | 2021-05-11 | 上海电子信息职业技术学院 | Internal and external signal transmission system for medical human body model |
| CN111464206B (en) * | 2020-05-22 | 2023-11-07 | 福州大学 | Automatic impedance matching adjusting device and method for current coupling type human body communication |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101582097A (en) * | 2009-04-03 | 2009-11-18 | 北京理工大学 | Finite element human body modeling method oriented to human body communications |
| CN104104450A (en) * | 2014-06-20 | 2014-10-15 | 中国科学院深圳先进技术研究院 | Human body communication channel modeling method based on non-uniform medium and system thereof |
| CN104866657A (en) * | 2015-05-13 | 2015-08-26 | 新疆农业大学 | Human body modeling method and apparatus |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3983628B2 (en) * | 2002-08-20 | 2007-09-26 | 独立行政法人科学技術振興機構 | Simulation system with human body model including muscles |
-
2015
- 2015-11-03 CN CN201510736412.6A patent/CN105262553B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101582097A (en) * | 2009-04-03 | 2009-11-18 | 北京理工大学 | Finite element human body modeling method oriented to human body communications |
| CN104104450A (en) * | 2014-06-20 | 2014-10-15 | 中国科学院深圳先进技术研究院 | Human body communication channel modeling method based on non-uniform medium and system thereof |
| CN104866657A (en) * | 2015-05-13 | 2015-08-26 | 新疆农业大学 | Human body modeling method and apparatus |
Non-Patent Citations (4)
| Title |
|---|
| IBC System Based on near-field electrostatic coupling;Shan Chuanwen,Jin Hongxin,Jian Chunying;《2011 International Conference on Mechatronic Science,Electric Engineering and Computer》;20110822;正文第482页-第485页 * |
| Simple Eletrical Model and Initial Experiments for Intra-Body Communication;YueMing Gao;《31st Annual International Conference of the IEEE EMBS Minneapolis,Minnesota,USA》;20090906;正文第697页-第700页 * |
| 人体前臂组织各向异性的人体通信信道模型;刘益和等;《中国科技论文》;20140430;正文第417页-第419页 * |
| 用于电流耦合型人体通信的有限元模型探究;曹玉婷;《现代生物医学进展》;20090930;正文第3734页-第3737页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105262553A (en) | 2016-01-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105262553B (en) | A kind of multiple coupled type human body channel modeling method of the Wearable of Electromagnetic field | |
| CN105335564B (en) | A kind of Wearable current mode human body channel modeling method of Electromagnetic field | |
| Wang et al. | Enabling multi-angle wireless power transmission via magnetic resonant coupling | |
| Álvarez-Botero et al. | Human body communication: Channel characterization issues | |
| CN109613333A (en) | A kind of coil resonance frequency measurement method suitable for radio energy transmission system | |
| CN105426581B (en) | A kind of capacitive human body channel modeling method of the Wearable of Electromagnetic field | |
| Tan et al. | Load detection method for multiple‐receiver wireless power transfer systems | |
| Gao et al. | Transmission efficiency analysis and optimization of magnetically coupled resonant wireless power transfer system with misalignments | |
| CN104090173B (en) | The distributed field strength measurement system and method for a kind of multinode based on Bluetooth communication | |
| Hu et al. | A self-powered, high-precision and minimum-channel touch panel coupling triboelectrification and uniform resistance film | |
| Li et al. | Lightning response of a grounding system buried in multiple layers in earth using the PEEC method based on the quasi-static complex image method | |
| CN101446613B (en) | Method for detecting coupling response of transmission cables excited by plane electromagnetic waves | |
| Bhat et al. | Wireless sensor network specific low power FIR filter design and implementation on FPGA | |
| Haerinia et al. | Resonant inductive coupling as a potential means for wireless power transfer to printed spiral coil | |
| CN107391785A (en) | A kind of multi-conductor transmission lines system space electric field describes method | |
| Zang et al. | Basic analysis of coupler loss in capacitive power transfer systems | |
| CN103675202A (en) | Battery-free air quality detector based on NFC (near field communication) | |
| CN106972901B (en) | Wearable device human body channel modeling method based on multilayer transmission line model | |
| Chen et al. | Multilayer distributed circuit modeling for galvanic coupling intrabody communication | |
| Gwon et al. | Enhancement of wireless power transmission efficiency and flexibility via an optimized three-dimensional coupled magnetic resonance system with double transmitter coil | |
| CN106612014A (en) | Distribution network anti-electric-larceny monitoring device and distribution network anti-electric-larceny monitoring system | |
| CN204758517U (en) | Outer dress type salt measuring device and portable salinity sensor system | |
| Li et al. | Partial element equivalent circuit modeling and design for wireless power transfer system via magnetic resonant coupling | |
| CN205596355U (en) | Portable wireless data chain terminal | |
| Haerinia et al. | Resonant inductive coupling as a potential means for wireless power transfer to printed spiral coil |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |