CN106253498A - A kind of implanted adaptive wireless electric energy transmission system - Google Patents
A kind of implanted adaptive wireless electric energy transmission system Download PDFInfo
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- CN106253498A CN106253498A CN201610708571.XA CN201610708571A CN106253498A CN 106253498 A CN106253498 A CN 106253498A CN 201610708571 A CN201610708571 A CN 201610708571A CN 106253498 A CN106253498 A CN 106253498A
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Abstract
The invention discloses a kind of implanted adaptive wireless electric energy transmission system, including external energy transmitter module, energy i (in vivo) collection module and self adaptation feedback control loop；Described external energy transmitter module includes power amplification circuit, signal source and driving, transmitting coil；Described power amplification circuit uses D class, and is voltage switch type；Described self adaptation feedback control loop mainly includes internal information gathering, vivo and vitro radio communication, external energy hole；Whole feedback arrangement is made up of internal feedback and two loops of system feedback；Described energy i (in vivo) collection module includes receiving coil, coupling electric capacity, full-wave rectifier filter, PWM module and LSK modulation circuit.The present invention proposes a kind of implanted adaptive wireless electric energy transmission system, can meet the continual power demands of implanted equipment, also make the transmission of energy have controllability, it is to avoid the transmission of excess energy.
Description
Technical field
The present invention relates to radio energy transmission system field, specifically a kind of implanted adaptive wireless electric energy transmission is
System.
Background technology
The continuous progress of electronic technology, manufacturing technology and bio-medical technology, promotes the mankind that medical research is real with clinic
Trample and shift a new height onto.Implantable medical device is electronic manufacturing technology and the combining, by surgical operation etc. of medical science
After mode implants, may be used for the change of long term monitoring body physiological parameter, it is achieved under life entity nature physiological status
Measurement real-time, accurate and control, assist diagnosis, treat some disease, even replace some function weak or lose organ,
It highlights day by day in the effect of the aspect such as biological study, medical diagnosis.Along with the raising of people's living standard, its application is the most day by day
Universal, such as cardiac pacemaker, artificial cochlea, artificial retina, capsule endoscope etc..
And for implanted equipment, stable, the efficient and safety supply of energy is very key problem.Traditional way
It is integrated disposable high energy density cells in implanted equipment, if capsule endoscope is frequently with the lithium battery of bulky capacitor, nickel
Cadmium cell is powered.Although the capacity that the development of modern science and technology makes battery constantly expands, but for powerful implantation equipment,
Such as artificial heart etc., traditional implants the electric energy that battery system cannot provide long-term.Limited battery life means battery
Periodicity substitute, the Operation Fee of this costliness has increased the weight of the financial burden of patient undoubtedly, and the volume implanting battery also counteracts that
The miniaturization paces of implantable medical device.
Energy can be supplied to internal implanted electronic equipment through skin by wireless energy transfer continuously, solves
Having determined and needed to change the problem of battery, meanwhile, its output also can meet the requirement of Implanted medical system, is therefore more come
The most implantable medical electronic systems use.The basis of current wireless energy transmission is near-field interaction coupled wave theory, but traditional
Mutual Inductance Coupling structure there is efficiency of transmission and increase the shortcoming declined rapidly with distance, received the power supply energy of recovery with distance
There is substantially fluctuation in change, is easily caused organisms tissue injury, and the excess energy owing to receiving can make human temperature
Degree raises, even harm people soma, and the electromagnetic radiation of excess also can cause the discomfort of human body, and realizes upper substantial amounts of discrete
Element too increases the difficulty implanted.
Summary of the invention
It is an object of the present invention to provide one and can meet the continual power demands of implanted equipment, also make the transmission of energy
There is controllability, it is to avoid the implanted adaptive wireless electric energy transmission system of the transmission of excess energy.
In order to solve above-mentioned technical problem, the technical solution used in the present invention is:
A kind of implanted adaptive wireless electric energy transmission system, collects mould including external energy transmitter module, energy i (in vivo)
Block and self adaptation feedback control loop；
Described external energy transmitter module includes power amplification circuit, signal source and driving, transmitting coil；Described power is put
Big circuit uses D class, and is voltage switch type；
Described feedback loop mainly includes internal information gathering, vivo and vitro radio communication, external energy hole；Whole feedback
Structure is made up of internal feedback and two loops of system feedback；
Described energy i (in vivo) collection module include receiving coil, coupling electric capacity, full-wave rectifier filter, PWM module with
And LSK modulation circuit.
Further, it is additionally provided with repeating coil, constitutes, with transmitting coil and receiving coil, the form that three-winding couples, protect
Card medium and long distance external energy transmitter module transmits with the energy of energy i (in vivo) collection module.
The invention has the beneficial effects as follows:
The present invention proposes a kind of implanted adaptive wireless electric energy transmission system, can meet implanted equipment uninterrupted
Power demands, also make the transmission of energy have controllability, it is to avoid the transmission of excess energy.
Accompanying drawing explanation
The present invention is further detailed explanation with detailed description of the invention below in conjunction with the accompanying drawings.
Fig. 1 is that implanted adaptive wireless electric energy of the present invention transmits system fundamental block diagram.
Fig. 2 is class-D amplifier structural representation of the present invention.
Fig. 3 is that three-winding of the present invention couples schematic diagram.
Fig. 4 is self adaptation feedback control loop fundamental block diagram.
Fig. 5 is energy i (in vivo) collection module schematic diagram of the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing, embodiments of the invention are described in detail, but the present invention can be defined by the claims
Implement with the multitude of different ways covered.
As Figure 1-5, the open a kind of implanted adaptive wireless electric energy transmission system of the present invention, it is characterised in that bag
Include external energy transmitter module, energy i (in vivo) collection module and self adaptation feedback control loop；
Described external energy transmitter module includes power amplification circuit, signal source and driving, transmitting coil；Described power is put
Big circuit uses D class, and is voltage switch type；
Described self adaptation feedback control loop mainly includes internal information gathering, vivo and vitro radio communication, external energy hole；
Whole feedback arrangement is made up of internal feedback and two loops of system feedback；
Described energy i (in vivo) collection module include receiving coil, coupling electric capacity, full-wave rectifier filter, PWM module with
And LSK modulation circuit.
Being additionally provided with repeating coil, described repeating coil couples with transmitting coil, receiving coil three-winding, it is ensured that middle long distance
In vitro outer energy transmitter module transmits with the energy of energy i (in vivo) collection module.
The design of each main modular described in detail below and working mechanism
1, power amplification circuit
Power amplification circuit is the core of external transmitter module, and its structure affects whole wireless energy to a great extent
The efficiency of amount transmission system and transmission characteristic, also determine the selection of drive circuit in transmitter module simultaneously.At present, at wireless energy
In amount transmission system, power amplification circuit typically uses D class or E class power amplification circuit to realize, and native system uses D class.
Although comparing class-D amplifier, E class A amplifier A is more widely used in wireless energy transfer system, especially exists
Under relatively-stationary application scenario, this kind of transmitter and receiver circuit such as wireless charging position, E class has relative class-D amplifier more really
High efficiency, but in the application of embedded system, the present invention uses the structure of D-type power amplifier to be more suitable for.
First, under the applied environment of embedded system, receive circuit and be often kept in motion or load instantaneous change, this
Time receive circuit and reflex to the load of radiating circuit and can immediately change, and the optimum working efficiency of E class A amplifier A is to need driving
Could realize in the case of dynamic signal dutyfactor, electric capacity and load parameter one_to_one corresponding, otherwise the efficiency of system declines quickly.
The working condition of class-D amplifier is then the most relevant to the parameter of switching tube, does not change, as long as choosing properly with load change
Switching tube, just can ensure that higher efficiency.
Secondly, impact on the difficulty of selection in " normalized power fan-out capability "." normalized power output energy
Power ", i.e. output and the ratio of device maximum voltage amp product.Under identical output, opening of E class A amplifier A structure
Close pipe and will need to bear the electricity stress of 3 times of D class formations.
Again, from the implementation of feedback control, the control of E class A amplifier A structure such as emitted energy to be realized,
Need immediately adjust supply voltage, tank capacitance when load change and drive signal dutyfactor, launch merit with realization regulation
During rate, system still works at optimum conditions, and class-D amplifier has only to adjust supply voltage and just can realize feedback control, greatly
Simplify greatly the complexity of feedback circuit.
Finally, an advantage of its relative class-D amplifier of E class A amplifier A is that its switching speed is fast, but implanted without
In heat input transmission system, safety is the problem that must take into, too high frequency can strengthen human body to radiation absorption thus
Injuring human body, this just limits the upper limit of switching frequency, and in confined switching frequency range, class-D amplifier structure can
To meet requirement.
The structure of voltage switch type class-D amplifier.Two switching tubes are connected between power supply and ground, and at excitation source signal
Control lower whorl conductance lead to so that A point generation square-wave signal, and owing to load circuit resonance is in the frequency of excitation source signal,
The electric current finally flowing into load is sinusoidal current.Two pipes are all operated on off state, and when it turns on, drain-source current is big,
But the voltage at drain-source two ends is almost nil；When pipe disconnects, although the voltage of its drain-source voltage is close to supply voltage, but does not has
Electric current flows through, therefore its switching power loss is the least, and theoretically zero.
Based on this, the wireless energy transfer system designed by the present invention, the power amplifier of its external transmitter module selects D
Class A amplifier A structure.Power amplifier and the drive circuit thereof of final body outer mold piece are as it can be seen, class-D amplifier is voltage switch
Type, because using upper and lower tubular construction, drive circuit uses transformer-coupled mode, the transformer coupled work that both can play isolation
With, it is to avoid two-part interfering, its ambipolar driving voltage can also accelerate the extraction speed of electric charge, makes up D class and puts
The inferior position that big device switching speed is not enough.And in order to reduce probability and the raising driving force that two pipes simultaneously turn on, drive circuit
Use biphase not overlap signal as drive source, then via complementary push-pull structure drive the above-mentioned transformer coupled loop mentioned.
2, three-winding coupled structure
Traditional Mutual Inductance Coupling transmission means can only ensure high efficiency of transmission in the maximum sized scope of coil, in medium and long distance
On efficiency of transmission decline rapidly with the increase of distance.The appearance of strong magnetic coupling theory solves the problem of this respect, and it is permissible
It is being several times as much as in the range of coil full-size realizing the transmission of efficient energy, but it is needing the resonator of a pair high q-factor, and
In the case of high efficiency, the reception power of load is the lowest.
" the strong magnetic coupling district " that strong magnetic coupling arrangement is constituted can guarantee that the high efficiency of transmission of energy.And divide from the angle of circuit
Analysis, is because resonator and has high q-factor, so the potentiation that Q-value is to system transfers efficiency.
The present invention, on the basis of Mutual Inductance Coupling two loop construction, adds the repeating coil of a high q-factor, weakens load right
The impact of coupling coil quality factor, this may improvement system efficiency of transmission in medium and long distance, i.e. one three-winding of formation
Structure.
Coupled structure is the key component of whole wireless energy transfer system, and it decides the efficiency of transmission of whole system.
On the basis of considering the constraint of actual implanted environment and human safety, determine operating frequency, coil selection, coil partly
The parameter such as footpath and the number of turn.
3, self adaptation feedback control loop
Self adaptation feedback control loop is the important component part of wireless energy transfer system, does not has feedback control, the energy of excess
Amount transmission may cause the damage of tissue.Feedback control loop is mainly by internal information gathering, vivo and vitro radio communication, external
The part composition such as energy hole.Whole feedback arrangement is made up of internal feedback and two loops of system feedback.Internal feedback control loop
The voltage that recovered by sampling thus control the electric current in load rapidly, shortcoming is that range of accommodation is limited.System feedback
Loop, by the internal voltage recovered of sampling, is transferred to external, then carries out emitted energy through MCU and numerical control regulated power supply
Controlling, its range of accommodation is wide, but response speed is slow.Two feedback control loops combine, and just can realize quickly and on a large scale anti-
Feedback controls, and need not the complicated circuits such as ADC.
4, energy i (in vivo) collecting circuit
Based on analysis above, energy i (in vivo) collection module mainly includes receiving coil, coupling electric capacity, all wave rectification filter
Ripple, PWM module and LSK modulation circuit, and in order to provide stable power supply to supply to load, the voltage of rectifying and wave-filtering is also
Need by a linear voltage regulator powering load again.
The environment of implanted limits the area of internal circuit, if system uses discrete component to build, then and its volume
The hugest with power consumption, which increase the difficulty of implantation.Therefore, the present invention determines to utilize IC design one to include line
Property the module such as source of stable pressure, PWM, band-gap reference energy recover and power management chip, it is achieved in wireless energy transfer body
The single-chip integrated of system.The system framework of whole three-winding adaptive wireless energy transmission system, including power amplification circuit,
Three-winding structure, self adaptation feedback control loop and energy i (in vivo) are collected and Power generation circuit.Based on implanted applied environment
Consider, devise the driving with class-D amplifier as core and power amplification circuit, greatly reduce answering of self adaptation feedback control loop
Miscellaneous degree, its relatively low electricity stress also improves the safety of system simultaneously.Simultaneously in order to reduce Kelvin effect and kindred effect
Impact, this chapter uses litz wire can increase the net sectional area of coil to the coil making in coupled structure, its winding method,
Reducing the AC impedance of coil, this improves the efficiency of transmission of system further.In order to propose the safety of high energy transmission, carry
Go out the feedback control technology of a kind of combination PWM and LSK, on the basis of not increasing considerably internal circuit complexity, it is achieved
Quick, feedback control on a large scale to energy.
Invention described above embodiment, is not intended that limiting the scope of the present invention.Any in the present invention
Spirit and principle within amendment, equivalent and the improvement etc. made, should be included in the claim protection model of the present invention
Within enclosing.
Claims (2)
1. an implanted adaptive wireless electric energy transmission system, it is characterised in that include external energy transmitter module, internal energy
Amount collection module and self adaptation feedback control loop；
Described external energy transmitter module includes power amplification circuit, signal source and driving, transmitting coil；Described power amplification electricity
Road uses D class, and is voltage switch type；
Described self adaptation feedback control loop mainly includes internal information gathering, vivo and vitro radio communication, external energy hole；Whole
Feedback arrangement is made up of internal feedback and two loops of system feedback；
Described energy i (in vivo) collection module includes receiving coil, coupling electric capacity, full-wave rectifier filter, PWM module and LSK
Modulation circuit.
Implanted adaptive wireless electric energy transmission system the most according to claim 1, it is characterised in that be additionally provided with junction line
Circle, described repeating coil couples with transmitting coil, receiving coil three-winding, it is ensured that medium and long distance external energy transmitter module and body
The energy transmission of self-energy collection module.
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| CN201610708571.XA CN106253498A (en) | 2016-08-23 | 2016-08-23 | A kind of implanted adaptive wireless electric energy transmission system |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106774582A (en) * | 2017-02-13 | 2017-05-31 | 许昌学院 | A kind of power circuit for being applied to organism implant system |
| CN108649708A (en) * | 2018-05-30 | 2018-10-12 | 哈尔滨工业大学 | A kind of wireless power supply system of the dynamic heartbeat model- following control based on artificial blood supply thin-film material |
| CN108653842A (en) * | 2018-05-30 | 2018-10-16 | 哈尔滨工业大学 | A kind of more receiving terminal wireless power transmissions auxiliary blood supply device of tape relay coil |
| CN108671298A (en) * | 2018-05-30 | 2018-10-19 | 哈尔滨工业大学 | A kind of wireless power transmission human body auxiliary blood supply device |
| CN108686274A (en) * | 2018-05-30 | 2018-10-23 | 哈尔滨工业大学 | A kind of more receiving terminal implantation type wireless electric energy transmission people's body auxiliary blood supply devices |
| CN108686275A (en) * | 2018-05-30 | 2018-10-23 | 哈尔滨工业大学 | A kind of annular auxiliary blood supply device of wireless power |
| CN108721719A (en) * | 2018-05-30 | 2018-11-02 | 哈尔滨工业大学 | A kind of human body auxiliary blood supply device based on the transmission of resonance type wireless electric energy |
| CN108736578A (en) * | 2018-05-30 | 2018-11-02 | 哈尔滨工业大学 | It is a kind of can wireless power electric wheelchair system |
| CN108904906A (en) * | 2018-05-30 | 2018-11-30 | 哈尔滨工业大学 | A kind of wireless power supply type heart assistance blood supply device |
| CN109698539A (en) * | 2018-12-30 | 2019-04-30 | 北京品驰医疗设备有限公司 | A kind of power supply unit and implanted spinal stimulator of implanted equipment |
| CN110624146A (en) * | 2018-05-30 | 2019-12-31 | 哈尔滨工业大学 | Wireless power supply' S supplementary blood supply unit of S-shaped |
| CN111398724A (en) * | 2020-04-20 | 2020-07-10 | 杭州电子科技大学温州研究院有限公司 | Detection method of implanted integrated coil for wireless power supply |
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| CN102832722A (en) * | 2012-08-31 | 2012-12-19 | 华南理工大学 | Implanted self-adaptive wireless source transmission method and system |
| CN105375650A (en) * | 2015-12-16 | 2016-03-02 | 东南大学 | Repeating coil design method for three coil structure middle distance wireless energy transmission system |
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| CN102157989A (en) * | 2011-03-28 | 2011-08-17 | 东南大学 | Closed loop wireless energy supply system for implantable medical electronic device |
| CN102832722A (en) * | 2012-08-31 | 2012-12-19 | 华南理工大学 | Implanted self-adaptive wireless source transmission method and system |
| CN105375650A (en) * | 2015-12-16 | 2016-03-02 | 东南大学 | Repeating coil design method for three coil structure middle distance wireless energy transmission system |
Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106774582B (en) * | 2017-02-13 | 2018-11-09 | 许昌学院 | A kind of power circuit applied to organism implant system |
| CN106774582A (en) * | 2017-02-13 | 2017-05-31 | 许昌学院 | A kind of power circuit for being applied to organism implant system |
| CN108671298B (en) * | 2018-05-30 | 2020-12-11 | 哈尔滨工业大学 | Human body auxiliary blood supply device adopting wireless power transmission |
| CN110624146A (en) * | 2018-05-30 | 2019-12-31 | 哈尔滨工业大学 | Wireless power supply' S supplementary blood supply unit of S-shaped |
| CN108686274A (en) * | 2018-05-30 | 2018-10-23 | 哈尔滨工业大学 | A kind of more receiving terminal implantation type wireless electric energy transmission people's body auxiliary blood supply devices |
| CN108686275A (en) * | 2018-05-30 | 2018-10-23 | 哈尔滨工业大学 | A kind of annular auxiliary blood supply device of wireless power |
| CN108721719A (en) * | 2018-05-30 | 2018-11-02 | 哈尔滨工业大学 | A kind of human body auxiliary blood supply device based on the transmission of resonance type wireless electric energy |
| CN108736578A (en) * | 2018-05-30 | 2018-11-02 | 哈尔滨工业大学 | It is a kind of can wireless power electric wheelchair system |
| CN108653842A (en) * | 2018-05-30 | 2018-10-16 | 哈尔滨工业大学 | A kind of more receiving terminal wireless power transmissions auxiliary blood supply device of tape relay coil |
| CN108904906A (en) * | 2018-05-30 | 2018-11-30 | 哈尔滨工业大学 | A kind of wireless power supply type heart assistance blood supply device |
| CN108649708B (en) * | 2018-05-30 | 2021-02-12 | 哈尔滨工业大学 | Wireless power supply system based on artificial blood supply film material for dynamic heartbeat following control |
| CN108671298A (en) * | 2018-05-30 | 2018-10-19 | 哈尔滨工业大学 | A kind of wireless power transmission human body auxiliary blood supply device |
| CN108904906B (en) * | 2018-05-30 | 2021-01-08 | 哈尔滨工业大学 | Wireless power supply type heart auxiliary blood supply device |
| CN108686274B (en) * | 2018-05-30 | 2020-12-11 | 哈尔滨工业大学 | Multi-receiving-end implanted wireless electric energy transmission human body auxiliary blood supply device |
| CN108653842B (en) * | 2018-05-30 | 2020-12-11 | 哈尔滨工业大学 | Multi-receiving-end wireless power transmission auxiliary blood supply device with relay coil |
| CN108649708A (en) * | 2018-05-30 | 2018-10-12 | 哈尔滨工业大学 | A kind of wireless power supply system of the dynamic heartbeat model- following control based on artificial blood supply thin-film material |
| CN109698539B (en) * | 2018-12-30 | 2021-01-05 | 北京品驰医疗设备有限公司 | Power supply device of implantable equipment and implantable spinal cord stimulator |
| CN109698539A (en) * | 2018-12-30 | 2019-04-30 | 北京品驰医疗设备有限公司 | A kind of power supply unit and implanted spinal stimulator of implanted equipment |
| CN111398724A (en) * | 2020-04-20 | 2020-07-10 | 杭州电子科技大学温州研究院有限公司 | Detection method of implanted integrated coil for wireless power supply |
| CN111398724B (en) * | 2020-04-20 | 2021-12-21 | 杭州电子科技大学温州研究院有限公司 | Detection method of implanted integrated coil for wireless power supply |
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Application publication date: 20161221 |