CN103501037A - Percutaneous wireless charging device with frequency modulation and amplitude modulation function applied to implantation type medical instrument - Google Patents
Percutaneous wireless charging device with frequency modulation and amplitude modulation function applied to implantation type medical instrument Download PDFInfo
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- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 claims description 2
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Abstract
The invention provides a percutaneous wireless charging device with a frequency modulation and amplitude modulation function applied to an implantation type medical instrument. A flat coil with an internally implanted coaxial magnetic core is utilized in vitro, and a hollow coil is utilized in vivo, so that the charging of the implantation type medical instrument from the vitro to the vivo is realized, the control on the optimal working point of a system is realized by modulating emission frequency and amplitude in a closed-loop control manner, the influence of too high temperature of an vivo implantation type medical instrument on the human body caused by low charging efficiency is prevented, and meanwhile the vitro charger can ensure that the heat does not exceed a danger threshold of the human body through a circuit design.
Description
Technical field
The present invention relates to the wireless charging device through skin with FMAM function for implantation medical equipment, belong to the implantation medical equipment technical field.
Background technology
The implantation medical equipment kind is various, have wide range of applications, and existing implantable medical product adopts the lithium primary cell of high-energy-density to be powered more in the market, and the life-span is mostly shorter.In recent years, along with the development of wireless technology and lithium rechargeable batteries technology, exploitation longer chargeable implantation medical equipment product of life-span has become the main flow trend of future development.
In implantation medical equipment patients with implantation body, and the isolation of the tissue such as skin is arranged between external charging device, need to adopt through skin wireless charging mode.This charging modes, generally based on the electromagnetic coupled principle, utilizes the penetration by electromagnetic fields human body skin to the implantation medical equipment transferring energy.Implantation medical equipment is generally used the Titanium sealing of biocompatibility, formed stronger electromagnetic shielding, yet, because there are the impacts such as eddy current effect in titanium shell in the electromagnetic coupled process, very easily cause the problem of vivo implantation type Medical Instruments heating in charging process.The coil and the circuit that are difficult to the titanium enclosure to implanting in charging process are accurately located, and have the problem because inside and outside device contraposition is crossed partially or the initial period contraposition overlong time of charging causes that the vivo implantation type Medical Instruments is generated heat and increased.For the contraposition problem, US20110022125 adopts the rotating eccentricity magnetic core to adjust the contraposition relation of inside and outside device, US20130023958 adopts the relative position of the inside and outside device of a plurality of sensor coil detection bodies and carry out the contraposition demonstration on screen, and the method that WO9918879 adopts Hall element to measure magnetic field intensity is carried out the contraposition prompting; For heating problem, thereby US2013105115 utilizes phase-change material to absorb heat suppresses instrument temperature rise increase, US5991665 utilizes cooling fan to carry out temperature control, and US20110022125 carries out the closed-loop control of temperature feedback by adjusting transmitting power and duty ratio.Yet, in above scheme,, there is the slow-footed problem of governing response in the inside and outside device wireless communication cycle limit of contraposition governing speed acceptor, simultaneously, extra sensor assembly or radiating module can bring the problem of system hardware structure complexity.In addition, the vivo implantation type Medical Instruments in different contrapositions position, the different charging stage, can cause the best operating point difference of wireless charging device through skin, charge efficiency is also different, and then causes in body the device heating also different.
For addressing the above problem, can realize the rapid-aligning of inside and outside device by directly monitoring external charged state (as emission current), thereby avoid because of the long problem that causes inside and outside device contraposition low-response of system communication cycle.In skin wireless charging technology, the frequency of emitted energy and amplitude are the most critical parameters of charging system, the frequency optimum traffic point of charging system generally is positioned near the system resonance frequency, regulating the optimization that can realize charge efficiency in conjunction with best effort amplitude point controls, therefore, need to be based on through skin radio communication closed loop feedback, controlling through the skin wireless charging system and be operated in the efficiency optimization point, be best operating point, thereby at utmost reduce the heating that brings the vivo implantation type Medical Instruments because charge efficiency is low.
Summary of the invention
For the deficiencies in the prior art, the purpose of this invention is to provide a kind of wireless charging device through skin with FMAM function that can meet the implantation medical equipment requirement, realize that by closed-loop control different charging stages, different contrapositions position charging system are operated in best operating point, and then realize external the highlyest to charge efficiency in body, avoid the body internal heat generation to surpass prescribed limits.
In order to realize the foregoing invention purpose, the present invention adopts following technical scheme:
A kind of through the skin wireless charging system, comprise receiving system in external emitter and body, wherein
Described external emitter comprises charging part, external antenna part, the first state monitoring apparatus and first control device;
Described charging part comprises charging drive unit, communication drivers device and signal of communication processing unit;
Described external antenna part comprises shell, external communication coil unit, external charge coil unit and electrical connection arrangement; The driving signal of telecommunication that described charging drive unit produces is sent to described external charge coil unit by described electrical connection arrangement, and described communication drivers device is connected with described external communication coil unit by described electrical connection arrangement with the signal of communication processing unit;
Described the first state monitoring apparatus can detect the operating state of described external communication coil unit and described external charge coil unit, and the data that measure are sent to described first control device;
In described body, receiving system comprises electrical power storage section, internal antenna section, the second state monitoring apparatus and second control device;
Described internal antenna section comprises communication coil unit and energy receiving coil unit in body; Described energy receiving coil unit receives the energy of described external charge coil unit emission with the resonance coupled modes;
Described the second state monitoring apparatus can detect the operating state of described electrical power storage section, and the data that measure are sent to described second control device;
Described second control device is sent to described first control device by the data of the operating state of described electrical power storage section by communication coil unit, external communication unit in body; Described first control device can be determined frequency and the amplitude of the described driving signal of telecommunication of best operating point, makes described charging system have maximum charge efficiency at described best operating point.
Described through the skin wireless charging system according to above technical scheme, wherein, described external communication coil unit comprises a flat coil, and with the flat magnetic core of its coaxial arrangement.
Described through the skin wireless charging system according to above technical scheme, wherein, described electrical power storage section comprises lithium ion battery.
Described through the skin wireless charging system according to above technical scheme, wherein, described the first state monitoring apparatus comprises:
Temperature sensor, for measuring the temperature of charging process heating panel;
The emission current transducer, for measuring the electric current of described charging drive unit.
Described through the skin wireless charging system according to above technical scheme, wherein, described emission current transducer is current transformer.
Described through the skin wireless charging system according to above technical scheme, wherein, described temperature sensor comprises the thermistor of a negative temperature coefficient, be welded on the border circular areas of electric crossover board, and be fixed on the middle circular groove position of the below heating panel of described external charge coil unit, measure the temperature of heating panel in charging process;
Described through the skin wireless charging system according to above technical scheme, the operating state of the described electrical power storage section that wherein, described the second state monitoring apparatus detects comprises one or more in following group: the skin temperature of receiving system in charging current, cell voltage, rectifying and wave-filtering voltage and described body.
Described through the skin wireless charging system according to above technical scheme, wherein, described first control device makes at first described charging drive unit be operated in default initial fixed transmission frequency f when the frequency of the described driving signal of telecommunication of determining described best operating point and amplitude
0with emission amplitude A
0;
Carry out subsequently the adjusting of optimum transmitting frequency point, by increasing tranmitting frequency or reducing tranmitting frequency and calculate the charge efficiency under current emission parameter, when current charge efficiency is maximum, finish the adjusting of tranmitting frequency;
Launched subsequently again the adjusting of amplitude, by increase, launch amplitude or reduce the emission amplitude and calculate the charge efficiency under current emission parameter, when current charge efficiency is maximum, finished the adjusting of emission amplitude; System enters best operating point the vivo implantation type Medical Instruments is charged.
Compared with prior art, the present invention has following beneficial effect:
(1) external emission current monitoring, but not feed back to judge coupling position through the skin radio communication, can realize the Best Coupling contraposition of the inside and outside device of body fast, and the contraposition process time that reduces to charge is long and cause the heating of vivo implantation type Medical Instruments to increase;
(2) can realize the best effort point control based on the charge efficiency optimisation strategy by the information feedback of the inside and outside charged state of body, improve charge efficiency, improve reliability and fail safe;
(3) in the situation that different contrapositions position or different charging stage can be adjusted tranmitting frequency and amplitude automatically, to guarantee that system works is at best operating point, effectively control the heating of vivo implantation type Medical Instruments in safety limit;
The accompanying drawing explanation
Fig. 1 is overall schematic of the present invention
Fig. 2 is the construction package schematic diagram of antenna part
Fig. 3 is the assembly scheme of installation of antenna part
Fig. 4 is the inside and outside device contraposition of body schematic diagram
Fig. 5 is external charger function module diagram
Fig. 6 is that closed loop feedback is controlled schematic diagram
Fig. 7 is external charger workflow schematic diagram
Embodiment
Below in conjunction with accompanying drawing, implantation medical equipment of the present invention is described in detail with the execution mode of the wireless charging device through skin with FMAM function.
As shown in Figure 1, the wireless charging device through skin with FMAM function for implantation medical equipment of the present invention, be comprised of external charger and vivo implantation type Medical Instruments 50; Wherein external charger is comprised of live part 10 and antenna part 14.Antenna part 14 comprises that external charge coil 11, external communication coil 12, external charge coil 11 and external communication coil 12 share flat magnetic core 13 etc., and implantation medical equipment titanium shell 50 inside comprise communication coil 52, charging control circuit 53, rechargeable battery 54 etc. in energy receiving coil 51, body.
The external charge coil 11 of built-in flat magnetic core 13 and energy receiving coil 51 are realized the electromagnetic energy transfer through skin 30 and titanium shell 50 by electromagnetic coupled.The energy receiving coil 51 implanted is hollow flatwise coil, the less-restrictive of external charge coil 11 and flat magnetic core 13, tranmitting frequency by adjusting external charge coil and emission amplitude etc., make system works at best operating point, raising is through the charge efficiency of skin wireless charging system, thus the heating of reduction vivo implantation type Medical Instruments.In external communication coil 12 and body, communication coil 52 carries out the bi-directional of body, interior external information by the electromagnetic coupled mode.
As shown in Figure 2, for the antenna part 14 of the wireless charging device through skin with FMAM function of implantation medical equipment, by the thermistor 17 of shell 16, external charge coil 11, external communication coil 12, flat magnetic core 13, electric crossover board 15, negative temperature coefficient, heating panel 18 etc., formed; The side that its housing 16 is pressed close to human body skin is embedded with heating panel 18, is beneficial to the heat conduction of vivo implantation type Medical Instruments 50.Electric crossover board 15 is flexible circuit board, and the FR-4 reinforcement is done by the section of end office (EO) be connected with live part 10, and other end border circular areas is welded with the thermistor 17 of negative temperature coefficient, and is fixed in the center circular groove of heating panel.Wherein, the inductance value of can the control agent outer charge coil 11 of the use of magnetic core 13 and external communication coil 12, the number of turn etc. and through the closely-related parameter of skin wireless charging efficiency, to improve coupling efficiency.The flat magnetic core 13 of the described device of the application and external charge coil 11 do not exist heating to exceed the problem of the normal range (NR) that people's physical efficiency bears, without adopting the special material heat radiation, safe and simple.The thermistor 17 of the shell embedded heating panel 18 of 16 1 side and negative temperature coefficient, can be beneficial to the heat radiation of vivo implantation type Medical Instruments and the monitoring of human skin tissue temperature.When the thermistor 17 of negative temperature coefficient monitors the human skin tissue temperature, surpass beyond safe range, external charger cuts off charging operations, can stop in time the heating of vivo implantation type Medical Instruments, to guarantee the thermal safety of human skin tissue.
As shown in Figure 3, each component mounting position for the antenna part 14 of the wireless charging device through skin with FMAM function of implantation medical equipment is, the border circular areas end that is welded with negative tempperature coefficient thermistor 17 of electric crossover board 15 is fixed in the circular groove of heating panel 18 center, settle the flat magnetic core 13 with the shell concentric on the border circular areas of electric crossover board 15, external charge coil 11 and external communication coil 12 share built-in flat magnetic core 13 and are placed in flat magnetic core 13 peripheries, external charge coil 11 is placed between flat magnetic core 13 and external communication coil 12, electric crossover board 15 local reinforcement ends are placed near the connecting line exit position with live part 10, realize external charge coil 11, the electronic circuit of external communication coil 12 and negative tempperature coefficient thermistor 17 and the electrical connection of live part 10.Antenna part 14 each assemblies all are placed in the same side of shell 16, wherein, external charge coil 11, external communication coil 12, the thermistor 17 of negative temperature coefficient, flat magnetic core 13 grades all are adhesively fixed on shell 16 downside inwalls by powerful double faced adhesive tape, shell 16 upper inside walls have structure muscle frame, be bonded with the about 2mm foam of thickness on the muscle frame, further strengthen the outer charge coil 11 of fixed body, external communication coil 12, flat magnetic core 13 positions of grade in shell 16, electric crossover board 15 is fixed by screws on shell 16 downside inwall muscle framves, external charge coil 11, external communication coil 12, the connecting lead wire of thermistor 17 grades of negative temperature coefficient is electrically connected with live part 10 by electric crossover board 15 switchings.
As shown in Figure 4, the axial line that A0 is external charger antenna part 10, the axial line that A1 is implantation medical equipment energy receiving coil 51.When antenna part 10 and implantation medical equipment shell 50 centering, A0 and A1 are not overlapping position, A0 and A1 when different contraposition positions, the efficiency of transmission difference, in body, the heating of device is also different.During different contrapositions position, external charge coil 11 is different with the coupling coefficient of energy receiving coil 51, and it is the size of emission current that the size of coupling coefficient is reflected on external charger operating state, and coupling coefficient is larger, the load that is mapped to the energy transmitting terminal is larger, thereby emission current is less.In the charge initiation incipient stage, can be monitored external emission current and come the outer charge coil 11 of control agent and energy receiving coil 51 to be in best centering position, A0 and A1 approach the contraposition position while overlapping.
Figure 5 shows that external charger function module diagram.External charger comprises live part 10 and antenna part 14, wherein, antenna part 14 is comprised of external charge coil 11, external communication coil 12 and negative tempperature coefficient thermistor 17 etc., and live part 10 is comprised of microcontroller 20, charging resonant capacitance 21, communication resonant capacitance 22, communication processing circuit 23, emission current instrument transformer and treatment circuit 24 thereof, processes temperature signal circuit 25, drive amplification circuit 26 etc.Communication resonant capacitance 22 forms with external communication coil 12 the bidirectional information transmission that the resonant tank of communicate by letter realizes that body is inside and outside, and charging resonant capacitance 21 and external charge coil 11 form the charging resonant tanks to be realized externally in body, installing the function of charging.The reception signal that communication processing circuit 23 receives on external communication coil 12, after the demodulation process such as second order bandpass filtering 27, signal amplification circuit 28, waveform shaping circuit 29, signal passes to microcontroller 20 and carries out the processing of device transmission information in body and the control of working state of system, the emission current detection signal of emission current instrument transformer and treatment circuit 24 reception & disposal charging resonant tanks thereof, the signal after processing passes to the judgement that microcontroller 20 carries out the inside and outside device contraposition of body position.The temperature signal that processes temperature signal circuit 25 reception & disposal negative tempperature coefficient thermistors 17 transmit, the mode of by the resistance of externally connecting, carrying out electric resistance partial pressure obtain temperature variant can be by the voltage signal of microcontroller reception & disposal, voltage signal after processing passes to microcontroller 20 and carries out the monitoring of human body skin surface temperature, when monitor temperature surpasses the human-body safety limit value, system will be suspended the thermal safety of charging process with guarantor soma, in monitor temperature is got back to the monitoring defined threshold, system will restart charging process and continue the vivo implantation type Medical Instruments is charged.Drive amplification circuit 26 inputs receive the drive control signal of microcontroller 20, and carry out power amplification, control communication resonant tank and charging resonant tank effectively to drive, wherein the driving chip in drive amplification circuit 26 all adopts the full-bridge topology of controlling with adaptive dead zone to drive chip.Microcontroller 20 receives the information monitoring feedback of ex vivo, outer operating state, according to the efficiency optimization strategy, exports corresponding drive control signal.
Figure 6 shows that closed loop feedback control schematic diagram.Vivo implantation type Medical Instruments 50 through the skin radio communication to the operating state in external charger carrier, comprise charging current in body, rectifying and wave-filtering voltage, cell voltage, the information such as titanium shell temperature, charging resonant circuit 31 is comprised of charging resonant capacitance 21 and external charge coil 11, emission current on charging resonant circuit 31 feeds back external emission current information via emission current instrument transformer and treatment circuit 24 thereof to microcontroller 20, microcontroller 20 receives voltage in external emission current feedback and body, electric current, the feedacks such as temperature, carry out the calculating of system tranmitting frequency and amplitude, and then export corresponding drive control signal.
The monitoring feedback of external emission current, be used to refer to the good and bad state of contraposition position of the energy receiving coil 51 of current external charger antenna part 14 and vivo implantation type Medical Instruments, when external emission current hour, the energy receiving coil 51 of external charger antenna part 14 and vivo implantation type Medical Instruments enters best contraposition position.After the charging contraposition finishes, external charger and vivo implantation type Medical Instruments are obtained charge information in body through the skin radio communication, calculate the charge efficiency under current state, carry out the adjustment of tranmitting frequency based on the efficiency optimization principle.After adjusting to the optimum frequency working point, charge efficiency can't further be optimized, now launched the adjustment of amplitude, guarantee that the vivo implantation type Medical Instruments charges normal under prerequisite the emission amplitude of carrying out under the efficiency optimization strategy and controls, reach the charge efficiency optimum point, now, be operated in best operating point through the skin wireless charging system.
Figure 7 shows that external charger workflow schematic diagram.After external charger start, the contraposition of on the LCD screen of live part 10, display reminding being charged starts, but, by the good and bad situation of portable antenna part 14 Real Time Observation charger screen contraposition positions, position, when screen display contraposition position is good, can select to enter the beginning charging operations, after the charging contraposition finishes, to carry out the adjusting of best operating point controls, the original charge device is operated in the initial fixed transmission frequency f of systemic presupposition _ 0 and emission amplitude A_0, the first step is carried out the adjusting of optimum transmitting frequency point, by increasing tranmitting frequency or reducing tranmitting frequency and calculate the charge efficiency under current emission parameter, when current charge efficiency is maximum, finish the adjusting of tranmitting frequency, enter the adjusting of second step emission amplitude, launch amplitude or reduce the emission amplitude and calculate the charge efficiency under current emission parameter by increase, when current charge efficiency is maximum, finish the adjusting of emission amplitude, system enters best operating point the vivo implantation type Medical Instruments is charged.
When lithium rechargeable batteries enters the different charging stages (preliminary filling stage, constant-current phase, constant-voltage phase), in body, device is mapped to external equivalent load difference, now, control by the restarting systems best operating point, guarantee that system works, at the high recharge efficiency environment, at utmost reduces the heating of vivo implantation type Medical Instruments.Simultaneously, the vivo implantation type Medical Instruments is built-in with thermistor monitoring titanium shell temperature, when monitoring titanium shell temperature over the setting secure threshold, in body, device passes to device outside by communication by alarm signal, device outside is by of short duration automatic cut-out charging process, and regularly carry out the monitoring of vivo implantation type Medical Instruments state, proceed again the startup of charging process after entering safe condition, to guarantee safe and reliable the carrying out of charging process.
Aforesaid way is the preferred embodiment of the present invention, for those skilled in the art, on basis at implantation medical equipment disclosed by the invention with the wireless charging device through skin with FMAM function, be easy to expect being applied to various instrument systems, and be not limited only to the described system configuration of the specific embodiment of the invention, therefore previously described mode is just preferred, and does not have restrictive meaning.
Claims (8)
1. one kind through the skin wireless charging system, comprises receiving system in external emitter and body, wherein
Described external emitter comprises charging part, external antenna part, the first state monitoring apparatus and first control device;
Described charging part comprises charging drive unit, communication drivers device and signal of communication processing unit;
Described external antenna part comprises shell, external communication coil unit, external charge coil unit and electrical connection arrangement; The driving signal of telecommunication that described charging drive unit produces is sent to described external charge coil unit by described electrical connection arrangement, and described communication drivers device is connected with described external communication coil unit by described electrical connection arrangement with the signal of communication processing unit;
Described the first state monitoring apparatus can detect the operating state of described external communication coil unit and described external charge coil unit, and the data that measure are sent to described first control device;
In described body, receiving system comprises electrical power storage section, internal antenna section, the second state monitoring apparatus and second control device;
Described internal antenna section comprises communication coil unit and energy receiving coil unit in body; Described energy receiving coil unit receives the energy of described external charge coil unit emission with the resonance coupled modes;
Described the second state monitoring apparatus can detect the operating state of described electrical power storage section, and the data that measure are sent to described second control device;
Described second control device is sent to described first control device by the data of the operating state of described electrical power storage section by communication coil unit, external communication unit in body; Described first control device can be determined frequency and the amplitude of the described driving signal of telecommunication of best operating point, makes described charging system have maximum charge efficiency at described best operating point.
2. according to claim 1ly through the skin wireless charging system, it is characterized in that, described external communication coil unit comprises a flat coil, and with the flat magnetic core of its coaxial arrangement.
3. according to claim 1ly through the skin wireless charging system, it is characterized in that, described electrical power storage section comprises lithium ion battery.
4. according to claim 1ly through the skin wireless charging system, it is characterized in that, described the first state monitoring apparatus comprises:
Temperature sensor, for measuring the temperature of charging process heating panel;
The emission current transducer, for measuring the electric current of described charging drive unit.
5. according to claim 4ly through the skin wireless charging system, it is characterized in that, described emission current transducer is current transformer.
6. according to claim 4 through the skin wireless charging system, it is characterized in that, described temperature sensor comprises the thermistor of a negative temperature coefficient, be welded on the border circular areas of electric crossover board, and be fixed on the middle circular groove position of the below heating panel of described external charge coil unit, measure the temperature of heating panel in charging process.
7. according to claim 1 through the skin wireless charging system, it is characterized in that, the operating state of the described electrical power storage section that described the second state monitoring apparatus detects comprises one or more in following group: the skin temperature of receiving system in charging current, cell voltage, rectifying and wave-filtering voltage and described body.
8. according to claim 1 through the skin wireless charging system, it is characterized in that, described first control device makes at first described charging drive unit be operated in default initial fixed transmission frequency f when the frequency of the described driving signal of telecommunication of determining described best operating point and amplitude
0with emission amplitude A
0;
Carry out subsequently the adjusting of optimum transmitting frequency point, by increasing tranmitting frequency or reducing tranmitting frequency and calculate the charge efficiency under current emission parameter, when current charge efficiency is maximum, finish the adjusting of tranmitting frequency;
Launched subsequently again the adjusting of amplitude, by increase, launch amplitude or reduce the emission amplitude and calculate the charge efficiency under current emission parameter, when current charge efficiency is maximum, finished the adjusting of emission amplitude; System enters best operating point the vivo implantation type Medical Instruments is charged.
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| CN105148402A (en) * | 2015-08-03 | 2015-12-16 | 北京品驰医疗设备有限公司 | Charging type implantable medical device having protection and limiting functions |
| CN105433946A (en) * | 2015-12-31 | 2016-03-30 | 苏州景昱医疗器械有限公司 | Wireless charging and positioning device and method |
| CN105680574A (en) * | 2015-12-30 | 2016-06-15 | 苏州景昱医疗器械有限公司 | Wireless charger capable of prompting position adjustment, prompting method and chargeable implantable medical equipment |
| CN107376121A (en) * | 2017-09-01 | 2017-11-24 | 清华大学 | Percutaneous wireless charging system and method with transmission power adaptation regulatory function |
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| CN110797954A (en) * | 2019-09-27 | 2020-02-14 | 北京品驰医疗设备有限公司 | Implanted medical equipment and charging alignment method thereof |
| CN111247710A (en) * | 2017-10-26 | 2020-06-05 | 松下电器（美国）知识产权公司 | Communication system and communication method |
| CN118473107A (en) * | 2024-07-12 | 2024-08-09 | 西安电掣风云智能科技有限公司 | In-vivo wireless energy transmission system and control method thereof |
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| CN100386916C (en) * | 2006-04-28 | 2008-05-07 | 清华大学 | Wireless charging device through skin in use for implantation type medical treatment instrument |
| CN101917070A (en) * | 2010-07-02 | 2010-12-15 | 罗倩倩 | Embedded medical power supply circuit |
| CN101980412B (en) * | 2010-09-27 | 2013-01-30 | 清华大学 | Percutaneous closed-loop control charging device for implantation type medical treatment instrument |
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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 |
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Address after: 102200 5th floor, building 1, No.1, Xingchang Road, Nanshao Town, Changping District, Beijing Patentee after: Beijing Pinchi Medical Equipment Co.,Ltd. Country or region after: China Patentee after: TSINGHUA University Address before: 102200 5th floor, building 1, No.1, Xingchang Road, Nanshao Town, Changping District, Beijing Patentee before: BEIJING PINS MEDICAL Co.,Ltd. Country or region before: China Patentee before: TSINGHUA University |