CN103501037B - The implantation medical equipment wireless charging device through skin with FMAM function - Google Patents
The implantation medical equipment wireless charging device through skin with FMAM function Download PDFInfo
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- CN103501037B CN103501037B CN201310469961.2A CN201310469961A CN103501037B CN 103501037 B CN103501037 B CN 103501037B CN 201310469961 A CN201310469961 A CN 201310469961A CN 103501037 B CN103501037 B CN 103501037B
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Abstract
The invention provides a kind of implantation medical equipment wireless charging device through skin with FMAM function, the flat coil of external employing built-in coaxial magnetic core, air core coil is adopted in body, realize charging from external to vivo implantation type Medical Instruments, tranmitting frequency and amplitude is regulated to realize the best effort point control of system by closed-loop control, prevent from causing the too high impact on human body of vivo implantation type Medical Instruments temperature because charge efficiency is low, by circuit design, external charger can ensure that there is not heating exceedes human-body safety limit value simultaneously.
Description
Technical field
The present invention relates to the wireless charging device through skin with FMAM function for implantation medical equipment, belong to implantation medical equipment technical field.
Background technology
Implantation medical equipment wide variety, have wide range of applications, the lithium primary cell of existing implantable medical product many employings high-energy-density is powered 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 life-span longer chargeable implantation medical equipment product has become the main trend of future development.
In implantation medical equipment patients with implantation body, and there is skin etc. to organize between external charging device to isolate, need to adopt through skin wireless charging mode.This charging modes, generally based on electromagnetic coupled principle, utilizes penetration by electromagnetic fields human body skin to implantation medical equipment transferring energy.Implantation medical equipment generally uses the Titanium of biocompatibility to seal, define stronger electromagnetic shielding, but there is the impacts such as eddy current effect due to titanium shell in electromagnetic coupled process, very easily cause the problem of vivo implantation type Medical Instruments heating in charging process.In charging process, the very difficult coil to the titanium enclosure implanted and circuit are accurately located, and exist because inside and outside device contraposition is crossed partially or the long problem causing the heating of vivo implantation type Medical Instruments to increase of charging initial period position aligning time.For alignment issues, US20110022125 adopts rotating eccentricity magnetic core to adjust the alignment of inside and outside device, US20130023958 adopts the relative position of device inside and outside multiple sensor coil detection bodies and carry out contraposition display on screen, and the method that WO9918879 adopts Hall element to measure magnetic field intensity carries out contraposition prompting; For heating problem, US2013105115 utilizes phase-change material to absorb heat thus suppresses instrument temperature rise to increase, US5991665 utilizes cooling fan to carry out temperature control, and US20110022125 carries out the closed-loop control of temperature feedback by adjustment transmitting power and duty ratio.But in above scheme, the inside and outside device wireless communication cycle restriction of contraposition governing speed acceptor, there is the slow-footed problem of governing response, meanwhile, extra sensor assembly or radiating module can bring the problem of system hardware structure complexity.In addition, vivo implantation type Medical Instruments is in different para postion, different charging stage, and the best operating point of wireless charging device through skin can be caused different, and charge efficiency is also different, and then causes device heating in body also different.
For solving the problem, realize the rapid-aligning of inside and outside device by directly monitoring external charged state (as emission current), thus avoid because system communication cycle length causes the problem of inside and outside device contraposition low-response.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 is generally positioned near system resonance frequencies, the optimized control that can realize charge efficiency is regulated in conjunction with best effort amplitude point, therefore, need to be operated in efficiency optimization point based on controlling through skin radio communication closed loop feedback through skin wireless charging system, i.e. best operating point, thus at utmost reduce the heating bringing vivo implantation type Medical Instruments because charge efficiency is low.
Summary of the invention
For the deficiencies in the prior art, the object of this invention is to provide a kind of wireless charging device through skin with FMAM function that can meet implantation medical equipment requirement, best operating point is operated in by closed-loop control realization different charging stage, different para postion charging system, and then realize external the highest to charge efficiency in body, avoid body internal heat generation to exceed prescribed limits.
In order to realize foregoing invention object, the present invention adopts following technical scheme:
A kind of through 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 enabled 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 enabled device is connected with described external communication coil unit by described electrical connection arrangement with signal of communication processing unit;
Described first state monitoring apparatus can detect the operating state of described external communication coil unit and described external charge coil unit, and is sent to described first control device by measuring the data obtained;
In described body, receiving system comprises electrical power storage portion, internal antenna portion, the second state monitoring apparatus and second control device;
Described internal antenna portion comprises communication coil unit and energy acceptance coil unit in body; Described energy acceptance coil unit receives the energy of described external charge coil unit transmitting with resonance coupled modes;
Described second state monitoring apparatus can detect the operating state in described electrical power storage portion, and is sent to described second control device by measuring the data obtained;
The data of the operating state in described electrical power storage portion are sent to described first control device by communication coil unit, external communication unit in body by described second control device; Described first control device can determine 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.
According to above technical scheme through skin wireless charging system, wherein, described external communication coil unit comprises a flat coil, and with the flat magnetic core of its placed coaxial.
According to above technical scheme through skin wireless charging system, wherein, described electrical power storage portion comprises lithium ion battery.
According to above technical scheme through skin wireless charging system, wherein, described first state monitoring apparatus comprises:
Temperature sensor, for measuring the temperature of heating panel in charging process;
Emission current transducer, for measuring the electric current of described charging drive unit.
According to above technical scheme through skin wireless charging system, wherein, described emission current transducer is current transformer.
According to above technical scheme through skin wireless charging system, wherein, described temperature sensor comprises the thermistor of a negative temperature coefficient, be welded on the border circular areas of electric crossover board, and the middle circle slot being fixed on the below heating panel of described external charge coil unit is put, measure the temperature of heating panel in charging process;
According to above technical scheme through skin wireless charging system, wherein, it is one or more that the operating state in described electrical power storage portion that described second state monitoring apparatus detects comprises in following group: the skin temperature of receiving system in charging current, cell voltage, rectifying and wave-filtering voltage and described body.
According to above technical scheme through skin wireless charging system, wherein, described first control device makes described charging drive unit be operated in default initial fixed transmission frequency f when determining the frequency of the described driving signal of telecommunication and the amplitude of described best operating point at first
0with transmitting amplitude A
0;
Carry out the adjustment of optimum transmitting frequency point subsequently, calculated the charge efficiency under current emission parameter by increase tranmitting frequency or reduction tranmitting frequency, when current charge efficiency is maximum, terminate the adjustment of tranmitting frequency;
Carry out the adjustment of launching amplitude more subsequently, launching amplitude and the charge efficiency calculated under current emission parameter by increasing to launch amplitude or reduce, when current charge efficiency is maximum, terminating the adjustment of launching amplitude; Namely system enters best operating point and charges to vivo implantation type Medical Instruments.
Compared with prior art, the present invention has following beneficial effect:
(1) external emission current monitoring, and non-percutaneous radio communication feedback judges coupling position, can realize the Best Coupling contraposition of the inside and outside device of body fast, reduction charging contraposition process time is long and cause the heating of vivo implantation type Medical Instruments to increase;
(2) by the information feed back of the inside and outside charged state of body, the best effort point control based on charge efficiency optimisation strategy can be realized, improve charge efficiency, improve reliability and fail safe;
(3) when different para postion or different charging stage, can automatically adjust tranmitting frequency and amplitude, to ensure that system works is at best operating point, effectively control the heating of vivo implantation type Medical Instruments within safety limit;
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 body inside and outside device contraposition schematic diagram
Fig. 5 is external charger function module diagram
Fig. 6 is that closed loop feedback controls schematic diagram
Fig. 7 is external charger operation schematic flow sheet
Embodiment
Below in conjunction with accompanying drawing, the execution mode of implantation medical equipment of the present invention with the wireless charging device through skin with FMAM function is described in detail.
As shown in Figure 1, the implantation medical equipment of the present invention wireless charging device through skin with FMAM function, is made up of external charger and vivo implantation type Medical Instruments 50; Wherein external charger is made up of live part 10 and antenna part 14.Antenna part 14 comprises external charge coil 11, external communication coil 12, external charge coil 11 and external communication coil 12 and shares flat magnetic core 13 etc., and implantation medical equipment titanium shell 50 inside comprises communication coil 52 in energy acceptance coil 51, body, charging control circuit 53, rechargeable battery 54 etc.
The external charge coil 11 of built-in flat magnetic core 13 and energy acceptance coil 51 realize the electromagnetic energy transfer through skin 30 and titanium shell 50 by electromagnetic coupled.The energy acceptance coil 51 implanted is hollow squeeze coil, the less-restrictive of external charge coil 11 and flat magnetic core 13, by adjusting the tranmitting frequency of external charge coil and launching amplitude etc., make system works at best operating point, improve the charge efficiency through skin wireless charging system, thus reduce the heating of 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 electromagnetic coupled mode.
As shown in Figure 2, the antenna part 14 with the wireless charging device through skin of FMAM function for implantation medical equipment is made up of the thermistor 17, heating panel 18 etc. of shell 16, external charge coil 11, external communication coil 12, flat magnetic core 13, electric crossover board 15, negative temperature coefficient; The side that its housing 16 presses 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 FR-4 reinforcement is done in local, the one end 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 use of magnetic core 13 can the outer charge coil 11 of control agent and external communication coil 12 inductance value, the number of turn etc. and through the closely-related parameter of skin wireless charging efficiency, to improve coupling efficiency.There is not the problem that heating exceeds the normal range (NR) that people's physical efficiency is born in the flat magnetic core 13 of device described in the application and external charge coil 11, without the need to adopting special material to dispel the heat, safe and simple.The thermistor 17 of the embedded heating panel 18 in shell 16 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.Exceed beyond safe range when the thermistor 17 of negative temperature coefficient monitors human skin tissue temperature, namely external charger cuts off charging operations, can stop the heating of vivo implantation type Medical Instruments in time, to ensure the thermal safety of human skin tissue.
As shown in Figure 3, each component mounting position for the antenna part 14 with the wireless charging device through skin of FMAM function of implantation medical equipment is, the border circular areas end being welded with negative tempperature coefficient thermistor 17 of electric crossover board 15 is fixed in the center circular groove of heating panel 18, the flat magnetic core 13 with shell concentric is settled 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 periphery, external charge coil 11 is placed between flat magnetic core 13 and external communication coil 12, electric crossover board 15 local reinforcement end is 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.The each assembly of antenna part 14 is all 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 grade to be all adhesively fixed on the downside of shell 16 on inwall by strong double-face glue, shell 16 upper inside walls has structure ledges, ledges is bonded with thickness and is about 2mm foam, the outer charge coil 11 of further reinforcement fixed body, external communication coil 12, the flat position of magnetic core 13 grade in shell 16, electric crossover board 15 to be fixed by screws on the downside of shell 16 in inwall ledges, external charge coil 11, external communication coil 12, the connecting lead wire of thermistor 17 grade of negative temperature coefficient is transferred by electric crossover board 15 and live part 10 is electrically connected.
As shown in Figure 4, A0 is the axial line of external charger antenna part 10, and A1 is the axial line of implantation medical equipment energy acceptance coil 51.When antenna part 10 and implantation medical equipment shell 50 centering, A0 and A1 be not at overlapping positions, A0 and A1 is when different para postion, and efficiency of transmission is different, and in body, the heating of device is also different.During different para postion, external charge coil 11 is different with the coupling coefficient of energy acceptance coil 51, and the size of coupling coefficient is reflected to the size for emission current in external charger operation state, and coupling coefficient is larger, the load being mapped to energy transmitting terminal is larger, thus emission current is less.In the charge initiation incipient stage, can carry out monitoring external emission current and carry out the outer charge coil 11 of control agent and energy acceptance coil 51 is in best centering position, namely A0 and A1 is close to para postion when 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 made up of external charge coil 11, external communication coil 12 and negative tempperature coefficient thermistor 17 etc., and live part 10 is made up 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 resonant tank that communicates and realizes the inside and outside bidirectional information transmission of body, and charging resonant capacitance 21 forms with external charge coil 11 resonant tank that charges and realizes external function of charging to device in body.Received signal strength on the outer communication coil 12 of communication processing circuit 23 receiving body, after the demodulation process such as second order bandpass filtering 27, signal amplification circuit 28, waveform shaping circuit 29, signal transmission carries out device in body to microcontroller 20 and sends the process of information and the control of working state of system, emission current instrument transformer and treatment circuit 24 thereof receive the emission current detection signal of process charging resonant tank, and the signal transmission after process carries out the judgement of the inside and outside device para postion of body to microcontroller 20.Processes temperature signal circuit 25 receives the temperature signal that process negative tempperature coefficient thermistor 17 transmits, the temperature variant voltage signal that can be received process by microcontroller is obtained by the mode of carrying out electric resistance partial pressure at external series resistance, voltage signal after process passes to the monitoring that microcontroller 20 carries out human skin's temperature, when monitor temperature exceedes human-body safety limit value, system will suspend charging process with the thermal safety of guarantor soma, when monitor temperature is got back in monitoring defined threshold, system will restart charging process and continue to charge to vivo implantation type Medical Instruments.Drive amplification circuit 26 input receives the drive control signal of microcontroller 20, and carry out power amplification, with effective drived control communication resonant tank and charging resonant tank, the full-bridge topology driving chip that the driving chip wherein in drive amplification circuit 26 all adopts band adaptive dead zone to control.Microcontroller 20 receives ex vivo, the information monitoring of outer operating state feedback, exports corresponding drive control signal according to efficiency optimization strategy.
Figure 6 shows that closed loop feedback controls schematic diagram.Vivo implantation type Medical Instruments 50 through 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 made up 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, the outer emission current of microcontroller 20 receiving body feeds back and voltage in body, electric current, the feedacks such as temperature, carry out the calculating of systems radiate 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 the para postion of the energy acceptance coil 51 of current external charger antenna part 14 and vivo implantation type Medical Instruments, when external emission current is minimum, namely the energy acceptance coil 51 of external charger antenna part 14 and vivo implantation type Medical Instruments enters best para postion.After charging contraposition terminates, external charger and vivo implantation type Medical Instruments obtain charge information in body through skin radio communication, calculate the charge efficiency under current state, carry out the adjustment of tranmitting frequency based on efficiency optimization principle.After adjusting to optimum frequency working point, charge efficiency cannot further be optimized, now carry out the adjustment of launching amplitude, the transmitting amplitude of carrying out under guarantee vivo implantation type Medical Instruments charges normal prerequisite under efficiency optimization strategy controls, reach charge efficiency optimum point, now, best operating point is operated in through skin wireless charging system.
Figure 7 shows that external charger operation schematic flow sheet.After external charger start, contraposition that display reminding charges by the LCD screen of live part 10 starts, can the good and bad situation of Real Time Observation charger screen para postion by portable antenna part 14 position, when screen display para postion is excellent, can select to enter beginning charging operations, after charging contraposition terminates, the regulable control of best operating point will be carried out, original charge device is operated in initial fixed transmission frequency f _ 0 of systemic presupposition and launches amplitude A_0, the first step carries out the adjustment of optimum transmitting frequency point, the charge efficiency under current emission parameter is calculated by increase tranmitting frequency or reduction tranmitting frequency, when current charge efficiency is maximum, terminate the adjustment of tranmitting frequency, enter the adjustment that second step launches amplitude, the charge efficiency under current emission parameter is calculated by increase transmitting amplitude or reduction transmitting amplitude, when current charge efficiency is maximum, terminate the adjustment of launching amplitude, system enters best operating point and charges to vivo implantation type Medical Instruments.
When lithium rechargeable batteries enters different charging stage (preliminary filling stage, constant-current phase, constant-voltage phase), in body, device is mapped to external equivalent load difference, now, by the control of restarting systems best operating point, ensure that system works is at high recharge efficiency environment, at utmost reduces the heating of vivo implantation type Medical Instruments.Simultaneously, vivo implantation type Medical Instruments is built-in with thermistor monitoring titanium shell temperature, when monitoring titanium shell temperature and exceeding setting secure threshold, in body, alarm signal is passed to device outside by communication by device, 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, after entering safe condition, proceed the startup of charging process again, to ensure 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, at implantation medical equipment disclosed by the invention with having on the basis of wireless charging device through skin of FMAM function, be easy to expect being applied to various instrument system, and the system configuration be not limited only to described by the specific embodiment of the invention, therefore previously described mode is just preferred, and does not have restrictive meaning.
Claims (6)
1., through a 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 enabled 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 enabled device is connected with described external communication coil unit by described electrical connection arrangement with signal of communication processing unit; Described charging drive unit can regulate the frequency of the described driving signal of telecommunication under the control of described first control device;
Described first state monitoring apparatus can detect the operating state of described external communication coil unit and described external charge coil unit, and is sent to described first control device by measuring the data obtained;
In described body, receiving system comprises electrical power storage portion, internal antenna portion, the second state monitoring apparatus and second control device;
Described internal antenna portion comprises communication coil unit and energy acceptance coil unit in body; Described energy acceptance coil unit receives the energy of described external charge coil unit transmitting with resonance coupled modes;
Described second state monitoring apparatus can detect the operating state in described electrical power storage portion, and is sent to described second control device by measuring the data obtained;
The data of the operating state in described electrical power storage portion are sent to described first control device by communication coil unit, external communication unit in body by described second control device; Described first control device can determine 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 first state monitoring apparatus comprises:
Temperature sensor, for measuring the temperature of heating panel in charging process;
Emission current transducer, for measuring the electric current of described charging drive unit;
Described first control device makes described charging drive unit be operated in default initial fixed transmission frequency f when determining the frequency of the described driving signal of telecommunication and the amplitude of described best operating point at first
0with transmitting amplitude A
0;
Carry out the adjustment of optimum transmitting frequency point subsequently, calculated the charge efficiency under current emission parameter by increase tranmitting frequency or reduction tranmitting frequency, when current charge efficiency is maximum, terminate the adjustment of tranmitting frequency;
Carry out the adjustment of launching amplitude more subsequently, launching amplitude and the charge efficiency calculated under current emission parameter by increasing to launch amplitude or reduce, when current charge efficiency is maximum, terminating the adjustment of launching amplitude; Namely system enters best operating point and charges to vivo implantation type Medical Instruments.
2. according to claim 1ly it is characterized in that through skin wireless charging system, described external communication coil unit comprises a flat coil, and with the flat magnetic core of its placed coaxial.
3. according to claim 1ly it is characterized in that through skin wireless charging system, described electrical power storage portion comprises lithium ion battery.
4. according to claim 1ly it is characterized in that through skin wireless charging system, described emission current transducer is current transformer.
5. according to claim 1 through 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 the middle circle slot being fixed on the below heating panel of described external charge coil unit is put, measure the temperature of heating panel in charging process.
6. according to claim 1 through skin wireless charging system, it is characterized in that, it is one or more that the operating state in the described electrical power storage portion that described second state monitoring apparatus detects comprises in following group: the skin temperature of receiving system in charging current, cell voltage, rectifying and wave-filtering voltage and described body.
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| CN105148402B (en) * | 2015-08-03 | 2018-03-20 | 北京品驰医疗设备有限公司 | Rechargeable implantable medical device with protection and restriction function |
| CN105680574B (en) * | 2015-12-30 | 2018-05-15 | 苏州景昱医疗器械有限公司 | It can prompt wireless charger, reminding method and the chargeable implantable medical devices of adjustment position |
| CN105433946B (en) * | 2015-12-31 | 2018-06-26 | 苏州景昱医疗器械有限公司 | Wireless charging positioning device and method |
| BR112018073997B1 (en) * | 2016-05-24 | 2020-01-07 | Synergia Medical | SYSTEM FOR CENTERING AN EXTERNAL ELEMENT WITH REGARD TO AN IMPLANTABLE MEDICAL DEVICE AND METHOD FOR ALIGNING AN EXTERNAL ELEMENT WITH AN IMPLANTABLE MEDICAL DEVICE IMPLANTED UNDER THE SKIN OF A PATIENT |
| US10707692B2 (en) * | 2017-01-26 | 2020-07-07 | Medtronic, Inc. | Recharge of implanted medical devices |
| US10530177B2 (en) * | 2017-03-09 | 2020-01-07 | Cochlear Limited | Multi-loop implant charger |
| CN107376121B (en) * | 2017-09-01 | 2020-11-13 | 清华大学 | Percutaneous wireless charging system and method with adaptive transmission power adjustment function |
| CN110279468B (en) * | 2017-09-15 | 2023-10-31 | 北京品驰医疗设备有限公司 | Equipment posture determining method and equipment |
| EP3703223B1 (en) * | 2017-10-26 | 2021-09-01 | Panasonic Intellectual Property Corporation of America | Communication system and communication method |
| CN110797954B (en) * | 2019-09-27 | 2021-10-22 | 北京品驰医疗设备有限公司 | Implanted medical equipment and charging alignment method thereof |
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