CN104639579B - A kind of method and system carrying out sensor network energy transmission using body surface channel - Google Patents
A kind of method and system carrying out sensor network energy transmission using body surface channel Download PDFInfo
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- CN104639579B CN104639579B CN201310556493.2A CN201310556493A CN104639579B CN 104639579 B CN104639579 B CN 104639579B CN 201310556493 A CN201310556493 A CN 201310556493A CN 104639579 B CN104639579 B CN 104639579B
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Abstract
The invention discloses a kind of method and system that sensor network energy transmission is carried out using body surface channel, the method include the steps that 1) passive sensor of the setting without battery with person under test, the electrode of the passive sensor are set to person under test's body surface or internal；Sensor controller is set on the body of the person under test, and the sensor controller is equipped with battery and electrode, and the electrode of sensor control is set on person under test's body surface；2) remote wireless control end sends signal to the sensor controller, starts the sensor controller；3) sensor controller sends carrier energy to the passive sensor by its electrode for being affixed on person under test's body surface；4) carrier energy passes through the body surface transmission of the person under test to the electrode of the passive sensor；5) carrier energy is converted to operating voltage and provides the energy for itself by the passive sensor.The present invention has the characteristics that efficiency of transmission is high, convenience safety is good, at low cost, applied widely.
Description
Technical field
The present invention relates to a kind of method and system that sensor network energy transmission is carried out using body surface channel, can be applied to
The sensor network of animal including humans or wearable medical monitoring system, using body surface channel to being affixed on skin
The method and apparatus that the energy of the transmitter transmitting on surface is transmitted, and is collected in terminal to energy.
Background technique
Sensor network and wearable medical monitoring system being good for due to its animal in collection including humans
Important function in health data, disease forecasting and early diagnosis, is always an important topic in medical electronics application study.
Based on low cost, the Radio Transmission Technology and system schema of low-power consumption facilitate patient and adopt in real time in routine work, life
The basic life parameters for collecting body alleviate inadequate resource by the aspectant interrogation time between reducing doctors and patients to improve efficiency
Contradiction.For other animals, then facilitate every sign of human observer real-time monitoring animal, improve working efficiency, reduces
Work difficulty.
Sensor network is made of the wearable sensors and Network Central Controller of multiplicity, and sensor detects temperature,
The virtual signals such as heart rate, Network Central Controller collect storage and processing signal.Sensor can be distributed in each position of animal,
Usual sensor can be divided into three classes: it is active, it is semi-active, and it is passive.Active sensor and semi-active sensor be battery powered into
Row work.The presence of chemical cell can generate several disadvantages: 1. increase the weight and volume of single-sensor；It can 2. reducing
By property and limit its service life；3. increasing device cost.And there is large number of patient for directly contacting on the skin
There is also conflicts for chemical cell, inevitably there is also chemical cell chemical spills, the danger such as react with biological tissue
Danger.And passive sensor is powered by external power supply, and the problem present on is avoided, therefore, passive sensor for
Future is widely applied in the presence of very big advantage.
Traditional passive sensor by far field antenna or near field antenna receive radiofrequency signal be circuit provide signal with
Energy, such as Fig. 1, the mechanism that near field antenna transmits energy is electromagnetic coupling, and distance is shorter；The transmission range of far field antenna is longer,
But the aerial decaying of electromagnetic wave is proportional to 1/d3(, and wherein d represents distance of the purpose to launch point to receiving point), energy damage
Consumption is very fast, this is a severe problem for energy transmission transfer efficiency.
Benton Calhoun professor research group once did super low-power consumption human body sensor network (Fan Zhang,
Brian Otis, Benton Calhoun, " A Batteryless19 μ W MICS/ISM-Band Energy Harvesting
Body Area Sensor Node SoC ", ISSCC2012, SESSION17), by way of far-field emission provides energy
Realize junction sensor passive, but biggish path attenuation makes the energy hole of entire sensor in microwatt magnitude,
Limit the realization of sensor complex function.
To sum up, a kind of channel is needed to improve the performance of whole system compared with the energy transmission scheme of small path attenuation characteristic.
Summary of the invention
The present invention provides a kind of method and system that sensor network energy transmission is carried out using body surface channel.Body surface channel
Refer to the medium and channel of energy and signal using the biosphere of skin surface and nearly skin surface as transmission, is with human body
Example, as shown in Figure 2.It is skin corium under the cuticula and epidermis of human body, it has higher conductivity that body surface is believed
The path attenuation in road is smaller, and lesser path attenuation will greatly improve the efficiency of transmission of energy, compared to other wireless transmission sides
Formula, so that transmission range is farther in the case where transmission power is fixed, or in the case where receiving the identical situation of power, it is only necessary to smaller
Transmission power.Test results are shown in figure 3, as seen from the figure, in 10MHz to 100MHz frequency range, when the energy of transmitting signal
One timing of amount, the energy received using traditional antenna transmission are much smaller than the energy received by body surface channel, and
With the increase of transmission range, the energy attenuation very little received by body surface channel.
The technical solution of the present invention is as follows:
A method of sensor network energy transmission being carried out using body surface channel, the steps include:
1) electrode of passive sensor of the setting without battery with person under test, the passive sensor is set to the person under test
Body surface or
In vivo；Sensor controller is set on the body of the person under test, and the sensor controller is equipped with battery and electricity
Pole,
The electrode of sensor control is set on person under test's body surface；
2) remote wireless control end sends signal to the sensor controller, starts the sensor controller；
3) sensor controller is sent to the passive sensor by its electrode for being affixed on person under test's body surface and is carried
Wave energy；
4) carrier energy passes through the body surface transmission of the person under test to the electrode of the passive sensor；
5) carrier energy is converted to operating voltage and provides the energy for itself by the passive sensor.
Further, the body surface channel is the skin corium of the person under test；The frequency range of the carrier energy be 10MHz~
100MHz。
Further, the electrode of the electrode of the passive sensor and the sensor controller passes through the body surface channel
Connection；The electrode is the electrode for coating elargol or the electrode with miniature pinpoint array.
Further, the passive sensor includes the rectified current for the carrier energy to be converted to DC voltage
Road.
Further, the passive sensor is the portable vitro passive sensor of the person under test or to be implanted into this to be measured
The intracorporal passive sensor of person.
Further, the sensor controller includes power amplifier and impedance matching circuit；The sensor control
The electrode of device is connect by the impedance matching circuit with the power amplifier.
Further, the measuring signal that the remote wireless control end sends over is passed through institute by the sensor controller
It states body surface channel and is sent to the passive sensor；The passive sensor acquires the letter of the person under test according to the measuring signal
Number, and signal collected is sent to the sensor controller by the body surface channel；Then the sensor control
Device sends it to the remote wireless control end.
A kind of system carrying out sensor network energy transmission using body surface channel, it is characterised in that including long distance wireless control
End processed, sensor controller for being set to person under test and passive without battery with person under test for being set to
Sensor；The electrode of the passive sensor is set to person under test's body surface or internal, wherein the remote wireless control end passes through nothing
Line communication mode and the sensor controller communicate to connect, the sensor controller be equipped with battery and for be set to this to
The electrode of survey person's body surface；When work, body surface channel and the passive biography of the electrode of the sensor controller by the person under test
Sensor communication connection.
To achieve the goals above, principle schematic diagram of the present invention is as shown in figure 4, using body surface channel to being affixed on skin surface
Sensor controller transmitting the energy method and apparatus being transmitted, and energy is collected in terminal, including energy
Emit reception interface and energy-transmission channel.The function at energy transmitting interface be by transmitter emitted energy signal, and can
With the modulation intelligence on energy signal, amplified by power amplifier, via impedance matching network and is affixed on skin surface
Emission electrode is by energy to input body surface channel as far as possible with small loss.Input energy meets human-body safety standard, can
Under the premise of receiving enough energy, supply current will not generate injury to human body or animal.Energy acceptance interface is to be affixed on skin
The electrode detection of skin surface or the passive sensor to implant, to the energy signal of distal end, will be collected by body surface transmission
The energy arrived receives energy and supply circuit completion by passive sensor receiving electrode by matching network, loss as small as possible
Signal acquisition, transmission, storage and other monitoring functions.Body surface channel is contact of the electrode with skin with the exchange interface of system
Place, transmission medium connection emission electrode and receiving electrode of the body surface channel as energy signal, completion sensor and controller
Signal path connection.
Compared with prior art, the present invention has the difference of essence on energy supply channel.Advantages of the present invention and product
Pole effect is as follows:
1) efficiency of transmission is high: compared to the power supply mode that conventional passive sensor uses air passage, the present invention is great
Efficiency of transmission is improved, so that transmission range is farther in the case where transmission power is fixed, or is receiving the identical feelings of power
Under condition, it is only necessary to lesser transmission power.For biologic applications, it means that it is opposite that feedback efficiency is collected in system information processing
The raising answered.Substantially increase the performance of whole system.
2) convenience safety is good: can be expired simultaneously for junction sensor using body surface channel energy transmission mode
Foot obtains biggish energy supply and does not use chemical cell, reduces the volume and weight of junction sensor.And it eliminates
The chemical cell that direct and skin is in contact, avoids potential risks.Due to higher efficiency of transmission, the energy of transmission can be with
It is opposite to reduce, meet human body and animal body to the safety standard of electric current, guarantees the safety of human body and animal body.
3) at low cost: to eliminate the presence of battery, the cost of individual node sensor greatly reduces.
4) applied widely: various types of electrodes can be used in the contact interface of sensor and skin, can be placed in biology
Each position of body.It, can greater efficiency transmission signal as long as channel exists.
Detailed description of the invention
Fig. 1 tradition receives radiofrequency signal by antenna and provides the schematic diagram of signal and energy for circuit.
Fig. 2 body surface is for radio channel schematic diagram.
Power by taking arm as an example and antenna is for electrical test data comparison schematic diagram by body surface channel by Fig. 3.
The wearable medical monitoring system schematic diagram that Fig. 4 is powered based on body surface.
Fig. 5 the specific embodiment of the present invention schematic diagram.
Specific embodiment
Below by embodiment and in conjunction with attached drawing, the present invention is described in detail.
The present embodiment is a kind of electrocardiogram (ECG) system powered using body surface channel.Traditional electrocardiogram needs
16 electrodes, are connected by electrical wiring on recording assay device, and detecting step is cumbersome, and many lines are brought not to patient
Just, unlikely accomplish real-time detection, family's use is also almost impossible.
Using the technology of this paper, electrocardio real-time monitoring system such as Fig. 5 of novel wireless power and wireless signal transmission
It is shown.The controller for containing battery with electrode that this system is worn on human body by one, 16 are integrated with microsensor
Circuit but without battery, passive sensor with electrode and Remote Data Analysis controlling terminal constitute.Wherein, it is worn on
Controller on human body can send control command and energy to microsensor via body surface channel by electrode, with
And data are sent to Remote Data Analysis controlling terminal by antenna；Microsensor is received by electrode and is sent by controller
Order and energy, acquisition electrocardiosignal simultaneously by electrode via body surface transmission to controller；Remote Data Analysis
Controlling terminal sends order to the controller with electrode being worn on human body by antenna and receives what it was sended over
Patient or doctor et al. are analyzed and showed to data-signal, as diagnosis basis.The Electrodes of passive sensor are smaller
It is better, existing electrode can be continued to use, either using the electrode (increasing conductivity) for coating elargol or with miniature needle point battle array
The electrode of column (the dead skin layer that miniature needle point can penetrate human epidermal reaches skin corium, increases conductivity).
The course of work of this system are as follows:
(1) Remote Data Analysis controlling terminal starts to measure electrocardio by antenna to the controller transmission being worn on human body
The order of signal；
(2) controller being worn on human body has received order, and the electrode by being attached to human epidermal by antenna,
The carrier energy of measuring command and certain amplitude is sent to microsensor；
(3) body surface channel is smaller for the decaying of the signal of specific band, and the microsensor without containing battery is logical
It crosses electrode and is collected into the sufficiently large measuring command and carrier energy sent from controller, by rectification circuit by carrier wave energy
Quantitative change is DC voltage, provides the energy for microsensor work, and handle the measuring command received by related circuit；
(4) microsensor (for passive sensor 1 and 2 as shown in Figure 5) acquires human ecg signal by electrode, and
By electrode, the controller being worn on human body is sent to via body surface channel；
(5) controller being worn on human body receives the return signal of microsensor by electrode, passes via antenna
Give Remote Data Analysis controlling terminal；
(6) Remote Data Analysis controlling terminal is received by antenna from the micro- of the controller transmission being worn on human body
The signal that type sensor detects is presented to patient or doctor etc. by data processing.
Since microsensor does not contain battery, only electrode and micro integrated circuit, its volume can be made small,
It is attached on human skin, due to not having electric wire to be connected, human body can be with voluntary activity.The controller being worn on human body only contains electricity
Pond, antenna and control chip, total volume is also not too large, can tie up in the large arm of people or loins.Teledata point
Analysis controlling terminal can then cooperate computer, and the terminals such as smart phone use, and record and analyze in real time, shared data.This system is free of
Live wire, power supply and signal transmission will not bring discomfort by body surface and wireless mode to measured, and measured can be with
It move freely, monitoring system can work at any time, bring great convenience to measured.
Above-described embodiment is not intended to limit the invention merely to illustrate the principle of technical solution of the present invention, all at this
Made any same variation and modification, are within the scope of protection of the invention within the spirit and principle of invention.
Claims (7)
1. a kind of method for carrying out sensor network energy transmission using body surface channel, the steps include:
Remote wireless control end sends signal to sensor controller, starts the sensor controller；The sensor control
Device is arranged with person under test, is equipped with battery and electrode, and the electrode is set on person under test's body surface；
The sensor controller sends control command and carrier energy to passive sensor by the electrode；The passive biography
The electrode of sensor is set to person under test's body surface or internal, and the passive sensor is free of battery；
The control command and carrier energy pass through the body surface transmission of the person under test to the electrode of the passive sensor；
The passive sensor, which receives control command and the carrier energy is converted to operating voltage, provides the energy for itself；Institute
The signal of passive sensor person under test according to the control signal acquisition is stated, and by the signal of the person under test described in
Body surface channel is sent to the sensor controller；The signal of the person under test is sent to described remote by the sensor controller
Journey wireless control end；
The body surface channel is the skin corium of the person under test；The frequency range of the carrier energy is 10MHz~100MHz.
2. the method as described in claim 1, it is characterised in that the electrode is to coat the electrode of elargol or with microneedle
The electrode of sharp array.
3. method according to claim 2, it is characterised in that the passive sensor includes for turning the carrier energy
It is changed to the rectification circuit of DC voltage；The passive sensor is vitro passive sensor or the implantation intracorporal plant of person under test
Enter formula passive sensor.
4. the method as described in claim 1, it is characterised in that the sensor controller includes power amplifier and impedance
With circuit；The electrode of the sensor controller is connect by the impedance matching circuit with the power amplifier.
5. a kind of system for carrying out sensor network energy transmission using body surface channel, it is characterised in that including remote wireless control
End, the sensor controller being set to person under test and the passive sensor without battery being set to person under test；Institute
The electrode for stating passive sensor is set to person under test's body surface or in vivo, for receiving control command and carrier energy, and by institute
It states carrier energy and is converted to operating voltage and provide the energy for itself, wherein the electrode of the passive sensor and the sensor
The electrode of controller is connected by the body surface channel；The body surface channel is the skin corium of the person under test；The carrier energy
Frequency range be 10MHz~100MHz；Mode and the sensor controller are logical by wireless communication at the remote wireless control end
Letter connection, the sensor controller are equipped with battery and the electrode for being set to person under test's body surface, the sensor control
Device sends control command and carrier energy to the passive sensor by the electrode.
6. system as claimed in claim 5, it is characterised in that the electrode is to coat the electrode of elargol or with microneedle
The electrode of sharp array.
7. system as claimed in claim 5, it is characterised in that the passive sensor includes for turning the carrier energy
It is changed to the rectification circuit of DC voltage；The sensor controller includes power amplifier and impedance matching circuit；The sensing
The electrode of device controller is connect by the impedance matching circuit with the power amplifier.
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| CN100563553C (en) * | 2004-11-04 | 2009-12-02 | L&P100有限公司 | Armarium |
| AT506185B1 (en) * | 2008-01-09 | 2012-01-15 | Nanoident Technologies Ag | DETECTION DEVICE FOR VITAL SIGNS |
| CN201446077U (en) * | 2009-05-26 | 2010-05-05 | 常州碳酸钙有限公司 | Strickling board type flour sieving machine |
| BR112012017166A2 (en) * | 2009-12-23 | 2016-03-15 | Delta Dansk Elektronik Lys Og Akustik | monitoring device |
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Non-Patent Citations (2)
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| 植入医学电器的体导电能量供给技术;吴明鹏;《中国优秀硕士学位论文全文数据库工程科技Ⅱ辑C030-40》;20110430;正文第1-85页 |
| 植入器件体导电能量传递电磁场模型的分析与仿真;谢迪;《中国优秀硕士学位论文全文数据库信息科技辑I136-336》;20091231;正文第1-70页 |
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