CN108653842B - Multi-receiving-end wireless power transmission auxiliary blood supply device with relay coil - Google Patents
Multi-receiving-end wireless power transmission auxiliary blood supply device with relay coil Download PDFInfo
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- CN108653842B CN108653842B CN201810541956.0A CN201810541956A CN108653842B CN 108653842 B CN108653842 B CN 108653842B CN 201810541956 A CN201810541956 A CN 201810541956A CN 108653842 B CN108653842 B CN 108653842B
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M60/00—Blood pumps; Devices for mechanical circulatory actuation; Balloon pumps for circulatory assistance
- A61M60/50—Details relating to control
- A61M60/508—Electronic control means, e.g. for feedback regulation
- A61M60/562—Electronic control means, e.g. for feedback regulation for making blood flow pulsatile in blood pumps that do not intrinsically create pulsatile flow
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M60/00—Blood pumps; Devices for mechanical circulatory actuation; Balloon pumps for circulatory assistance
- A61M60/10—Location thereof with respect to the patient's body
- A61M60/122—Implantable pumps or pumping devices, i.e. the blood being pumped inside the patient's body
- A61M60/126—Implantable pumps or pumping devices, i.e. the blood being pumped inside the patient's body implantable via, into, inside, in line, branching on, or around a blood vessel
- A61M60/148—Implantable pumps or pumping devices, i.e. the blood being pumped inside the patient's body implantable via, into, inside, in line, branching on, or around a blood vessel in line with a blood vessel using resection or like techniques, e.g. permanent endovascular heart assist devices
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M60/00—Blood pumps; Devices for mechanical circulatory actuation; Balloon pumps for circulatory assistance
- A61M60/40—Details relating to driving
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M2205/00—General characteristics of the apparatus
- A61M2205/82—Internal energy supply devices
Abstract
The invention provides a multi-receiving-end wireless electric energy transmission auxiliary blood supply device with a relay coil, wherein an external power supply of the blood supply device controls an external power supply, a bus capacitor, an inverter and an energy transmitting coil to be sequentially connected, the relay coil and the energy transmitting coil are in the same plane, and the relay coil is nested outside the energy transmitting coil; the receiving coils, the high-voltage rectifier bridge, the DC-DC conversion device, the maintaining capacitor and the electroactive polymer film are sequentially connected, the n receiving coils receive energy transmitted by nuclear resonance emitted by the wireless electric energy emitting device, the energy is converted into electric waves through the high-voltage rectifier bridge and transmitted to the DC-DC conversion device, and the electric waves are filtered by the maintaining capacitor and then supply power to the electroactive polymer film. The problem of traditional human supplementary blood supply device bulky, external power easily lead to bacterial infection thus threaten patient's health is solved. The power supply mode of the multiple receiving ends of the invention enables a plurality of EAP films to be implanted in the body and work simultaneously, thereby achieving the purpose of auxiliary blood supply to a plurality of blood vessels simultaneously.
Description
Technical Field
The invention relates to a human body auxiliary blood supply device, in particular to a wireless power transmission auxiliary blood supply device with a relay coil, and belongs to the field of auxiliary blood supply devices.
Background
Valves are present between the four atria (chambers) of the heart and are of critical importance in ensuring blood circulation in one direction by opening or closing the valve, preventing backflow of blood into the newly exiting chamber. For patients with severe organ failure, the heart structures cannot operate normally, and an artificial auxiliary device needs to be implanted. In the treatment process of diseases aiming at heart failure, a human body auxiliary blood supply pump is adopted in the traditional method, namely, a motor device is arranged on a main blood vessel of a heart to assist and replace the blood pumping function of the heart and supply blood to organs of the human body. However, the traditional human body auxiliary blood supply pump has a large volume, is not beneficial to installation of surgeons, has a heavy weight, and is also a burden for patients, and the most main problem is that a power supply required by a motor pump is externally arranged by externally connecting a power line through subcutaneous operation, so that bacteria or virus infection can be caused if a wound is exposed for a long time, and the life health of the patients is seriously threatened.
Disclosure of Invention
The invention solves the problems that the traditional human body auxiliary blood supply device has larger volume and the external power supply is easy to cause bacterial infection, thereby threatening the health of patients.
The invention relates to a wireless power transmission human body auxiliary blood supply device which comprises a wireless power transmitting module, a wireless power receiving module and an electroactive polymer film; the wireless electric energy transmitting module comprises an external power supply control system, a relay coil and an energy transmitting coil, wherein the external power supply control system comprises an external power supply, an inverter and a main controller, the inverter is connected in parallel with two ends of the external power supply, the main controller is connected in series with the inverter, the energy transmitting coil is connected in parallel with the inverter, the relay coil and the energy transmitting coil are in the same plane, and the relay coil is nested outside the energy transmitting coil;
the wireless power receiving module comprises a receiving coil, a high-voltage rectifier bridge, a conducting wire and a maintaining capacitor, the receiving coil, the high-voltage rectifier bridge, the maintaining capacitor and the electroactive polymer film are connected in parallel through the conducting wire respectively, the receiving coil receives energy transmitted by nuclear resonance emitted by the wireless power transmitting module, the energy is converted into electric waves through the high-voltage rectifier bridge, and the shrinkage of the electroactive polymer film is controlled after the energy is filtered by the maintaining capacitor.
Preferably, the electroactive polymer film comprises a first film, a second film and a third film, the first film, the second film and the third film are concentrically and circularly stacked, the first film and the third film are made of ferroelectric crystal polar polymers, and the second film is made of PVC polymers.
Preferably, the size of the energy transmission coil is 8cm-10 cm.
Preferably, the size of the relay energy coil is 10-12 cm.
Preferably, the core material of the lead is an aluminum metal foil, and the core material is wrapped by an insulating film.
The working principle of the invention is as follows: the wireless electric energy transmission human body auxiliary blood supply device can assist or replace a human body valve structure to work, and through applying voltage excitation to an electroactive polymer (EAP) film, the EAP film is stimulated by radial force to deform in the radial direction to complete a contraction process, so that the opening and the closing of a blood vessel are controlled. When the blood vessel is in operation, the EAP film is tightly nested in the blood vessel wall outside the heart chamber, so that the blood vessel and the EAP film are vertically placed.
The wireless power transmission human body auxiliary blood supply device has the beneficial effects that:
1) the EAP film is applied without any liquid, belongs to a dry driving system, and has the advantages of simple structure, convenient control, small volume, light weight, high system efficiency and the like.
2) The wireless power supply mode with the relay coil and multiple receiving ends has the greatest advantage that the power supply output level requirement of up to 5kV can be provided for the receiving coil, so that more selection spaces are provided for selecting materials and shapes of EAP film loads, and a wireless power supply system without the relay coil cannot achieve the high voltage output level; meanwhile, the transmission distance of the system is increased by using the relay coil, the selection range of the controllable auxiliary blood supply device is enlarged, the surgical risk of a patient is reduced, and the free movement space of the patient is enlarged.
3) The power supply mode of multiple receiving ends enables a plurality of EAP loads to be implanted in the body and work simultaneously so as to supply auxiliary blood to a plurality of blood vessels simultaneously, thereby providing a better treatment mode for a patient.
4) When the medical blood vessel wall wireless power supply works, the EAP films are tightly arranged on the outer sides of the blood vessel walls, the size is small, the wireless power receiving end is arranged in a human body, and the problem of bacterial infection caused by external power supply is solved.
Drawings
FIG. 1 is a side view of an electroactive polymer film of the present invention;
fig. 2 is a top view of an electroactive polymer film of the present invention;
FIG. 3 is a schematic view of the overall structure of the multi-receiving-end wireless power transmission auxiliary blood supply device with relay coil according to the present invention;
FIG. 4 is a schematic diagram showing the comparison of the electroactive polymer film of the present invention before and after the extrusion deformation of the blood vessel;
FIG. 5 is a schematic diagram showing the change in morphology of an electroactive polymer film in response to a change in voltage of an energy transmitting coil and an inverter driving signal according to the present invention;
FIG. 6 is a circuit diagram of the operation of the multiple receiving end implanted wireless power transmission human body auxiliary blood supply device according to the present invention;
wherein the labeling is as follows: 1-an electroactive polymer film; 101-film one; 102-film two; 103-a three-film 2-external power control system; 3-a relay coil; 4-an energy emitting coil; 5-a receiving coil; 6-conducting wire.
Detailed Description
The following description of the embodiments of the present invention will be made in detail with reference to the accompanying drawings 1 to 6:
the first embodiment is as follows: the present embodiment is explained with reference to fig. 1 to 6. The multi-receiving-end wireless electric energy transmission auxiliary blood supply device with the relay coil comprises a wireless electric energy transmitting end and a wireless electric energy receiving module; the wireless electric energy transmitting end comprises an external power supply control system 2, a relay coil 3 and an energy transmitting coil 4, the external power supply control system 2 comprises an external power supply and an inverter, the inverter is connected to two ends of the external power supply in parallel, the energy transmitting coil 4 is connected with the inverter in parallel, the relay coil 3 and the energy transmitting coil 4 are in the same plane, and the relay coil 3 is nested outside the energy transmitting coil 4;
the wireless electric energy receiving module comprises a receiving coil 5, a high-voltage rectifier bridge, a DC-DC conversion device, a conducting wire and a maintaining capacitor, wherein the receiving coil 5, the high-voltage rectifier bridge, the DC-DC conversion device, the maintaining capacitor and the electroactive polymer film 1 are respectively connected in parallel through the conducting wire 6, the receiving coil 5 receives energy transmitted by nuclear resonance emitted by the wireless electric energy emitting module, the energy is converted into electric waves through the high-voltage rectifier bridge and transmitted to the DC-DC conversion device, and the energy is filtered by the maintaining capacitor to control the shrinkage of the electroactive polymer film 1.
The external power supply is a battery, a lithium battery or a nickel-metal hydride battery and the like can be selected according to different battery type selection ranges, the voltage of the battery is 24V-36V, and the energy endurance problem can be well solved by using the external power supply; the inverter and the high-voltage rectifier are used for converting direct current and alternating current so as to achieve energy conversion; the DC-DC conversion device is used for converting the electric energy of one voltage value into the electric energy of another voltage value; the maintaining capacitor plays a role in filtering and ensures that the boosting process of the system is stable trapezoidal wave.
The normal range of the adult heart beat frequency is 60-100 beats per minute, but the average person takes the intermediate value, the frequency is most within the range of 70-90 beats per minute, if the frequency is about 1.3Hz according to 80 beats per minute, namely the direct current needs to be maintained for 0.76s, and the blood vessel is squeezed by utilizing the deformation generated by the direct current, thereby achieving the effect of blood supply. Since the EAP film belongs to a special load, the resistance and the capacitance of the system change during the power-on process and the power-off process, the capacitance of the EAP film changes from 10pF to 30pF, and the impedance changes from 1Mohm to 2.5 Mohm.
The external power supply is used as a main energy source of the system to supply direct current to the inverter, the inverter converts the direct current into high-frequency alternating current, the working frequency of the system is controlled through the LC series voltage type resonant circuit, electric energy is converted into high-frequency electromagnetic energy, and the relay coil 3 is excited to enable the relay coil 3 to resonate. The energy of the relay coil 3 is reactive energy, and the current value of the relay coil is 3-15 times of the resonance current, so that the magnetic field intensity of the system is improved, and the transmission distance and efficiency of the system are increased. The receiving coil 5 is a multi-turn inductance coil, the inductance value of the receiving coil is 1mH-80mH, magnetic energy is converted into electric energy through inductive coupling, under the condition of a fixed receiving sectional area, the magnetic flux of a system is certain, but the flux linkage of the system is related to the number of turns, namely the output induced electromotive force is a multiple of the number of turns n. The magnetic field intensity is increased by the relay coil 3, the magnetic energy is converted into electric energy by utilizing an inductive coupling structure of the receiving coil 5, wherein the receiving side belongs to multi-turn large electricityThe induction of small-sized coils, i.e. the same as in conventional transformers,
wherein U is1For relaying line 3 voltage, and U2For receiving the voltage of the coil 5, n1The number of turns of the relay coil 3, and n2The number of turns of the receiving coil 5.
The electroactive polymer film 1 comprises a first film 101, a second film 102 and a third film 103, wherein the first film 101, the second film 102 and the third film 103 are arranged in a concentric circle stacking mode, the first film 101 and the third film 103 are ferroelectric crystal polar polymers, and the second film 102 is a PVC polymer.
The electroactive polymer film 1 is divided into three layers, wherein the first film 101 and the third film 103 are ferroelectric, crystalline, polar polymers having an electronic dipole moment that is reversed when an appropriate electric field is applied; the second film 102 is a PVC polymer, due to the change of the electronic dipole moment, the film side connected to the positive power supply is contracted by providing the direct-current voltages of the upper layer and the lower layer, the original deformation is maintained by the negative electrode, so that the whole form of the EAP film 1 is changed, the regular deformation of the film can be realized through the step pulse direct-current signal, the blood vessel wall is extruded in cooperation, and blood is provided for the heart. The EAP film 1 has the main advantage of not requiring any liquid at all, belonging to a dry drive system, and has the characteristics of simple structure, convenient control, small volume, light weight, high system efficiency, and the like.
The size of the relay energy coil 3 is 12cm-16 cm.
The size of the energy transmitting coil 4 is 10cm-12 cm.
The power supply requirement of the EAP film 1 is a high-voltage direct-current power supply, high voltage is applied to the surface of the EAP film, the EAP film is broken down by the high voltage to deform and squeeze a blood vessel, so that the blood supply requirement is generated, the power supply voltage is 100V-5000V pulse direct current, the power is 5W-10W, and auxiliary devices with different voltage levels can be designed according to different blood supply requirements. The wireless energy receiving device for supplying power to the EAP film 1 needs to be arranged in a human body, and due to the special power supply requirement of the EAP film 1, a three-coil wireless power supply model, namely a multi-stage jump type wireless boosting model, is adopted by the energy transmitting coil 4, the relay coil 3 and the energy receiving coil 5, wherein the energy receiving coil 5 side adopts an induction type energy transmission mode, namely a resonance type compensation capacitor is not arranged, and the energy transmitting coil 4 and the relay coil 3 adopt a resonance type energy transmission mode and are provided with the resonance compensation capacitor. The relay coil 2 increases the transmission distance of the system, increases the selection range of the controllable auxiliary blood supply device, reduces the surgical risk of the patient and increases the free movement space of the patient.
The core material of the lead 6 is made of aluminum metal foil, and an insulating film is wrapped outside the core material.
Because EAP film 1 closely installs in a plurality of vascular walls outsides, places the wireless power receiving module of EAP film 1 power supply in human inside, so need guarantee to place the wire of human inside in and will have the security, replace traditional wire plus insulating film with aluminium system metal foil, fine prevention electric leakage plays the safety protection effect.
The specific operation process of the multi-receiving-end wireless power transmission auxiliary blood supply device with the relay coil according to the first embodiment is as follows:
an external power supply serves as a main energy source of the system to supply direct current to an inverter, the inverter converts the direct current into high-frequency alternating current and then transmits the high-frequency alternating current to a transmitting coil 3, the transmitting coil 3 converts electric energy into high-frequency magnetic energy, an energy transmitting coil 4 is coupled with a relay coil 3 to generate reactive current in the relay coil 3 and enhance a transmission magnetic field, N receiving coils 5 are respectively in inductive coupling with the transmitting coil 4 to convert the magnetic energy into the electric energy, the electric energy is converted into stable direct current voltage required by a corresponding EAP film 1 through a high-frequency rectifying filter circuit and a DC-DC conversion circuit to be supplied to a load to work, and the driving.
The above-mentioned embodiments further explain the objects, technical solutions and advantages of the present invention in detail. It should be understood that the above-mentioned embodiments are only examples of the present invention, and are not intended to limit the present invention, and that the reasonable combination of the features described in the above-mentioned embodiments can be made, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (3)
1. A multi-receiving-end wireless power transmission auxiliary blood supply device with a relay coil is characterized by comprising a wireless power transmitting module, n wireless power receiving modules and n electroactive polymer films (1), wherein n is more than or equal to 2; the wireless electric energy transmitting module comprises an external power supply control system (2), a relay coil (3) and an energy transmitting coil (4), wherein the external power supply control system (2) comprises an external power supply, a bus capacitor and an inverter, the external power supply, the bus capacitor, the inverter and the energy transmitting coil (4) are sequentially connected, the relay coil (3) and the energy transmitting coil (4) are in the same plane, and the relay coil (3) is nested outside the energy transmitting coil (4);
the n wireless power receiving modules respectively comprise a receiving coil (5), a high-voltage rectifier bridge, a DC-DC conversion device and a maintaining capacitor, the receiving coil (5), the high-voltage rectifier bridge, the DC-DC conversion device, the maintaining capacitor and the electroactive polymer film (1) are sequentially connected, the n receiving coils (5) receive energy transmitted by nuclear resonance emitted by the wireless power emitting module, the energy is converted into electric waves through the high-voltage rectifier bridge and transmitted to the DC-DC conversion device, and the electroactive polymer film (1) is controlled to shrink after filtering through the maintaining capacitor;
the electroactive polymer film (1) comprises a first film (101), a second film (102) and a third film (103), wherein the first film (101), the second film (102) and the third film (103) are concentrically arranged in a laminated mode, the first film (101) and the third film (103) are made of ferroelectric crystal polar polymers, and the second film (102) is made of PVC polymers;
and the first film (101) and the third film (103) of the electroactive polymer film (1) are both provided with aluminum metal foils for connecting with a lead, and insulating films are arranged on the peripheries of the metal foils.
2. The multiple receiving end wireless power transmission auxiliary blood supply device with relay coil according to claim 1, wherein the relay coil (3) has a size of 12cm-16 cm.
3. The multiple receiving end wireless power transmission auxiliary blood supply device with relay coil according to claim 1, wherein the size of the energy transmitting coil (4) is 10cm-12 cm.
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| CN201810541956.0A CN108653842B (en) | 2018-05-30 | 2018-05-30 | Multi-receiving-end wireless power transmission auxiliary blood supply device with relay coil |
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| CN201810541956.0A CN108653842B (en) | 2018-05-30 | 2018-05-30 | Multi-receiving-end wireless power transmission auxiliary blood supply device with relay coil |
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| CN108653842B true CN108653842B (en) | 2020-12-11 |
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| CN110548225B (en) * | 2017-12-29 | 2021-08-10 | 深圳硅基仿生科技有限公司 | Radio frequency signal detection device and retina stimulator |
| CN109603007A (en) * | 2018-12-07 | 2019-04-12 | 浙江大学 | A kind of implantation type electric stimulation device based on magnetic coupling resonance formula wireless energy transfer |
| CN113328536B (en) * | 2021-06-29 | 2023-03-28 | 哈尔滨工业大学 | Multi-relay wireless energy and data cooperative transmission system |
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