Double-coil wired series relay wireless power supply artificial urinary catheterization device

Abstract

The utility model discloses a double-coil wired series relay wireless power supply artificial urinary catheterization device, which comprises an energy sending module, an energy relay module and an energy receiving module, the energy sending module is independent of a human body, and the energy relay module and the energy receiving module are arranged in the human body; the energy transmitting module, the energy relay module and the energy receiving module are wirelessly connected through magnetic resonance coupling; the energy relay module comprises a first relay coil and a second relay coil which are connected in series through a wire. The energy receiving module comprises a receiving coil and an electromagnetic valve, the energy receiving module receives energy and opens the electromagnetic valve to conduct urination operation, wireless power supply can be conducted on the implanted device, and the operation of replacing a battery on the implanted device is omitted.

Description

Technical Field

[0001] The present application relates to the field of implantable medical technology, and specifically refers to an artificial urinary catheterization device with dual-coil wired series relay and wireless power supply. Background Art

[0002] In the medical field, some patients cannot control the sphincter to urinate autonomously due to central nervous system lesions and other reasons, which causes urine retention problems. The current mainstream catheterization technology is to insert a catheter into the bladder through the urethra to drain urine, or to drain urine through a cystostomy catheter opened in the abdomen. However, both methods have some problems. For the former, since the end of the catheter will extend out of the body, long-term indwelling bacteria will invade along the inner cavity of the catheter or invade the urethra and bladder along the contact surface of the urethra-mucosa, causing infection problems, increasing the patient's pain and difficulty of care; for the latter, it may cause a series of serious consequences such as intestinal damage, repeated cystostomy infection or bladder infection.

[0003] Due to the development of implantable medical devices, the patient's urination can be controlled by implanting the device near the urethral sphincter. However, the built-in battery of the implantable device cannot provide power for a long time, so the battery of the implantable device needs to be replaced regularly. However, each battery replacement requires an operation on the patient, which increases the patient's pain and the difficulty of care. Utility Model Content

[0004] In order to overcome the deficiencies of the prior art, the utility model provides a dual-coil wired series relay wirelessly powered artificial urinary catheterization device, which can wirelessly power an implanted device and eliminate the need to replace batteries for the implanted device.

[0005] The utility model provides a double-coil wired series relay wireless power supply artificial urinary catheterization device, the double-coil wired series relay wireless power supply artificial urinary catheterization device comprises: an energy transmission module, an energy relay module and an energy receiving module, the energy transmission module is independent of the human body, the energy relay module and the energy receiving module are arranged in the human body;

[0006] The energy sending module is wirelessly connected to the energy relay module via magnetic resonance coupling, and the energy relay module is wirelessly connected to the energy receiving module via magnetic resonance coupling; the energy relay module includes a first relay coil and a second relay coil, and the first relay coil and the second relay coil are connected in series once via a wire; the first relay coil and the energy sending module are wirelessly connected to receive energy via magnetic resonance coupling, and the second relay coil and the energy receiving module are wirelessly connected to send energy via magnetic resonance coupling; the energy receiving module includes a receiving coil and a solenoid valve, and the energy receiving module receives energy and opens the solenoid valve to perform urination operation.

[0007] Further, the energy sending module includes a DC voltage unit, a full-bridge inverter, a resonant element unit and a transmitting coil, the DC voltage unit, the full-bridge inverter, the resonant element unit and the transmitting coil are connected in series in sequence through wires, the transmitting coil is wirelessly connected to the first relay coil through magnetic resonance coupling, and the transmitting coil sends energy to the first relay coil.

[0008] Furthermore, the energy relay module further includes a compensation capacitor, and the compensation capacitor is wired in series with the first relay coil and the second relay coil respectively.

[0009] Furthermore, the energy receiving module comprises a shell, inside which the receiving coil, the resonant capacitor, the rectifier bridge, the voltage stabilizer and the solenoid valve are sequentially arranged, and the solenoid valve is in the form of a cylindrical through-hole;

[0010] The shell is implanted in a urinary catheter, and the on-off of the electromagnetic valve is controlled to control urinary catheterization. The receiving coil and the second relay coil are wirelessly connected to receive energy through magnetic resonance coupling to generate high-frequency induced voltage.

[0011] Furthermore, the transmitting coil is a planar circular spiral coil, and the first relay coil is a planar circular spiral coil.

[0012] Furthermore, the second relay coil is a cylindrical solenoid coil and is arranged outside the urethra and surrounds the urethra, and the receiving coil is a cylindrical solenoid coil, which is set in the inner central area of ​​the second relay coil and arranged along the axis of the urethra.

[0013] Furthermore, the dual-coil wired series relay wirelessly powered artificial catheterization device adopts the LCC-SS topology, the energy sending module resonant circuit adopts the LCC compensation topology, the energy relay module resonant circuit adopts the dual-coil and compensation capacitor series compensation topology, and the energy receiving module resonant circuit adopts the series compensation topology.

[0014] Furthermore, the first relay coil, the compensation capacitor and the second relay coil of the energy relay module resonant circuit adopt LCL series compensation, the first relay coil is coupled with the transmitting coil, and the second relay coil is coupled with the receiving coil.

[0015] Furthermore, the length direction of the second relay coil and the receiving coil is the axial direction of the urethra, and the second relay coil and the receiving coil control the mutual inductance between the second relay coil and the receiving coil by setting the coupling length in the same direction.

[0016] Furthermore, the reflected impedance of the energy receiving module resonant circuit to the second relay coil is equal to the parasitic impedance of the energy relay module resonant circuit.

[0017] The beneficial effects of the utility model are as follows: compared with the prior art, the artificial urinary catheter device provided by the utility model does not need to lead the urinary catheter out of the body, thus avoiding the possible problem of bacterial infection. The artificial urinary catheter device provided by the utility model is equipped with an energy transmitting coil in vitro, an energy relay module with two coils in wired series is configured in the subcutaneous fat layer and the outside of the urethra tube, and an electromagnetic valve module containing a wiring coil is configured in the urethra. When urination is required, the energy transmitting coil in vitro is started, and the energy is transmitted to the receiving coil in the urethra through the energy relay module with two coils in wired series, and the electromagnetic valve is opened to urinate. That is, the system provided by the utility model generates energy by setting an energy transmitting module, and the energy relay module of the double coil receives and wirelessly powers the energy receiving module, and at the same time, an electromagnetic valve is set in the energy receiving module, and the energy receiving module receives energy to control the on and off of the electromagnetic valve, thereby controlling the urethra to urinate, reducing the patient's pain and nursing difficulty. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The technical solution and other beneficial effects of the present application will be made apparent by describing in detail the specific implementation methods of the present application in conjunction with the accompanying drawings.

[0019] Figure 1 This is a schematic structural diagram of a dual-coil wired series relay wirelessly powered artificial urinary catheterization device provided in an embodiment of the utility model.

[0020] Figure 2 This is a schematic diagram of the structure of the energy receiving module provided in an embodiment of the utility model.

[0021] Figure 3 This is a circuit structure diagram of a dual-coil wired series relay wirelessly powered artificial urinary catheterization device provided in an embodiment of the utility model.

[0022] Figure 4 This is a schematic diagram of the coil structure of a double-coil wired series relay wirelessly powered artificial urinary catheterization device provided by the present utility model. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0024] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0025] The disclosure below provides many different embodiments or examples to realize the different structures of the present application. In order to simplify the disclosure of the present application, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present application. In addition, the present application can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplification and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the various specific processes and material examples provided by the present application, but those of ordinary skill in the art can appreciate the application of other processes and / or the use of other materials.

[0026] Wireless power supply for implantable medical devices can solve the problem that batteries placed in medical devices in the body cannot provide power for a long time by wirelessly supplying power to medical devices implanted in the body. At present, wireless power transmission has been widely studied in the fields of pacemakers, cochlear implants, artificial hearts, capsule endoscopes, etc. The utility model provides a dual-coil wired series relay wireless power supply artificial catheterization device based on the catheter problem in the prior art, which can supply power to medical devices implanted in the body by wireless means.

[0027] Figure 1 This is a schematic diagram of the structure of the dual-coil wired series relay wireless power supply artificial urinary catheterization device provided by the embodiment of the utility model. Figure 1As shown, the dual-coil wired series relay wirelessly powered artificial catheterization device provided by the embodiment of the utility model includes: an energy sending module, an energy relay module and an energy receiving module, the energy sending module is independent of the body, and the energy relay module and the energy receiving module are arranged at the internal urinary catheter; the energy sending module is wirelessly connected to the energy relay module through magnetic resonance coupling, and the energy relay module is wirelessly connected to the energy receiving module through magnetic resonance coupling; the energy relay module includes a first relay coil and a second relay coil, and the first relay coil and the second relay coil are connected in series once through a wire; the first relay coil and the energy sending module are wirelessly connected to receive energy through magnetic resonance coupling, and the second relay coil and the energy receiving module are wirelessly connected to send energy through magnetic resonance coupling; the energy receiving module includes a receiving coil and a solenoid valve, and the energy receiving module receives energy and opens the solenoid valve to perform urination operation.

[0028] Specifically, the energy transmission module is arranged outside the body, and the energy transmission module includes a DC voltage unit, a full-bridge inverter, a resonant element unit and a transmitting coil. The DC voltage unit, the full-bridge inverter, the resonant element unit and the transmitting coil are connected in series in sequence through a wire, and the transmitting coil is wirelessly connected to the first relay coil through magnetic resonance coupling, and the transmitting coil transmits energy to the first relay coil. The energy transmission module is powered by a 24V DC power supply, and the energy transmission module generates high-frequency alternating current and drives a parallel resonant circuit composed of the transmitting coil and the resonant element unit, wherein the transmitting coil is used to transmit energy. The transmitting coil is a planar circular spiral coil, and is used by the first relay coil placed in the subcutaneous fat layer under the human skin when catheterization is required.

[0029] The energy relay module is arranged in the body, and the energy relay module includes a first relay coil, a second relay coil and a compensation capacitor, and the compensation capacitor is connected to the first relay coil and the second relay coil respectively. The first relay coil, the second relay coil and the compensation capacitor are connected by wire to form a series resonant circuit. The first relay coil is implanted in the subcutaneous fat by surgery, and is used to receive the energy emitted by the transmitting coil outside the body to generate a high-frequency induced voltage. The induced voltage is applied to the impedance of the series resonant circuit of the energy relay module to generate a high-frequency current, which flows through the second relay coil, and the second relay coil is placed around the urethral wall by surgery. Specifically, the first relay coil is a planar circular spiral coil, which is close to the transmitting coil outside the body; the second relay coil is a cylindrical solenoid coil, which is surgically surrounded by the upper part of the external sphincter outside the urethra.

[0030] Figure 2This is a schematic diagram of the structure of the energy receiving module provided in this embodiment.

[0031] like Figure 2 As shown, the energy receiving module includes a shell, and a receiving coil, a resonant capacitor, a rectifier bridge, a voltage regulator and the solenoid valve are connected in series in sequence inside the shell, and the solenoid valve is in the form of a cylindrical penetration; the shell is implanted in the urinary catheter, and the urinary catheter is controlled by controlling the on and off of the solenoid valve. The receiving coil and the second relay coil receive energy through wireless connection through magnetic resonance coupling to generate a high-frequency induced voltage. Specifically, the shell is a hollow cylindrical shape, and the receiving coil, the resonant capacitor, the rectifier bridge, the voltage regulator and the solenoid valve and other components are fixed in the shell. The receiving coil is a cylindrical solenoid coil, and the receiving coil is arranged in the inner center area of ​​the second relay coil. The shell is pushed into the urethra through the body and fixed at the position of the external urethral sphincter. The upper end of the shell reaches the bladder neck, and the lower end reaches below the external sphincter. The solenoid valve in the shell is in the form of a cylindrical penetration, and the solenoid valve is a normally closed type. When there is sufficient energy input from the outside, the solenoid valve opens to urinate.

[0032] The receiving coil receives the energy sent by the second relay coil and generates a high-frequency induced voltage. The induced voltage is applied to the resonant circuit of the energy receiving module to generate a high-frequency alternating current, which is rectified and filtered by a rectifier bridge to supply power to a linear regulator. The linear regulator outputs a 5V DC voltage to drive the normally closed voltage valve to open, thereby expelling urine.

[0033] Figure 3 This is a circuit structure diagram of the dual-coil wired series relay wireless power supply artificial urinary catheterization device provided in this embodiment. Figure 4 This is a schematic diagram of the coil structure of the artificial urinary catheterization device with double coils, wired series relay and wireless power supply provided in this embodiment.

[0034] like Figure 3 , Figure 4 As shown, the dual-coil wired series relay wireless power supply artificial catheterization device provided in this embodiment includes three resonant circuits, an energy transmission resonant circuit, a series dual-coil energy relay resonant circuit, and an energy receiving resonant circuit. Among them, the energy transmission resonant circuit adopts an LCC compensation topology to provide a stable voltage when the load equivalent resistance changes, the energy relay module resonant circuit adopts a dual-coil wired series compensation topology, and the energy receiving module resonant circuit adopts a series compensation topology.

[0035] Specifically, the first relay coil, the compensation capacitor and the second relay coil of the energy relay module resonant circuit adopt the LCL series compensation method, the first relay coil is coupled with the transmitting coil, and the second relay coil is coupled with the receiving coil. The length direction of the second relay coil and the receiving coil is the axial direction of the urethra, and the second relay coil and the receiving coil control the mutual inductance between the second relay coil and the receiving coil by setting the coupling length in the same direction. The dual-coil wired series relay wireless power supply artificial catheterization device provided in this embodiment adopts the optimal design method for the mutual inductance of the second relay coil and the receiving coil, so that the receiving module obtains higher efficiency and maximum energy transmission power. And by adjusting the mutual inductance of the second relay coil and the receiving coil, the reflected impedance of the energy receiving module resonant circuit to the second relay coil is equal to the parasitic impedance of the energy relay module resonant circuit, so that the energy receiving module obtains the maximum power.

[0036] like Figure 3 As shown, the transmitting coil setting of the energy sending module of the dual-coil wired series relay wireless power supply artificial urinary catheterization device provided in this embodiment includes:

[0037] The resonant circuit of the energy transmission module is preferably an LCC compensation topology. Under the condition of complete resonance, the LCC compensation topology has the characteristic of maintaining a stable output voltage even when the power at the receiving end changes. At the same time, the transmission module coil under LCC compensation has a constant current source characteristic. Even if the distance between the transmission module coil and the first coil of the relay module is large (for example, when the position where the patient places the transmission module coil is greatly offset from the position of the first coil of the relay module), it will not generate too much current, thereby ensuring the safety of the device and the patient.

[0038] In addition, the compensation coil and transmitting coil of the energy sending module both adopt a planar spiral coil structure to reduce the occupied space volume. At the same time, the two coils are placed horizontally overlapping but separated by a magnetic isolation sheet in the middle, which reduces the occupied space volume while reducing the influence of mutual inductance.

[0039] The LCC compensation of the energy transmission module resonant circuit is designed in a completely resonant way, that is, the compensation inductance L is designed. r , compensation capacitor C r , the transmitting coil inductance L1, and the transmitting coil compensation capacitor C1 satisfy:

[0040]

[0041]

[0042] Where ω is the resonant angular frequency in the resonant circuit, and the resonant coil L is rThe transmitting coil L1 is a planar circular spiral coil. r 0.1mm*15 strand Litz wire is used to wind 16 turns, the outer diameter of the coil is 32mm, and the inductance is 3.7uH. L1 is wound with 0.1mm*50 strand Litz wire in two layers, each layer has 8 turns, the outer diameter is 38mm, and the inductance is 9.4uH. According to formulas (1) and (2), the resonant compensation capacitor C is calculated respectively. r The values ​​of C1 and C2 are 255nF and 164nF respectively. Furthermore, the resonant inductor L is wrapped with a magnetic isolation sheet. r Then it is placed overlapping with the transmitting coil L1 to save space.

[0043] The receiving coil setting of the energy receiving module of the dual-coil wired series relay wireless power supply artificial urinary catheterization device provided in this embodiment includes:

[0044] The receiving coil is a cylindrical solenoid coil and is wound with a Litz wire of a smaller diameter. The receiving coil needs to be placed in the urethra, and the urethra has the characteristics of a small diameter (usually not exceeding 8mm) and a slightly longer axial length (about 20cm for male urethra and about 4-6cm for female urethra). Therefore, the receiving coil is designed to be able to place a solenoid coil along the urethra axially instead of a planar coil. In order to further wind a coil with a larger inductance in a limited space, a Litz wire with a smaller diameter is used to obtain more coil turns, preferably 0.05mm*15 strands of Litz wire. The energy receiving module resonant circuit adopts an LC series compensation design, that is, the receiving module coil inductance L4 and the transmitting coil compensation capacitor C4 are designed to meet:

[0045]

[0046] Wherein, ω is the resonant angular frequency, the receiving module coil L4 is in the form of a solenoid coil, the outer diameter of the coil is 6 mm, and its preferred winding length and inductance value need to be determined in the preferred mutual inductance M between the second relay coil and the receiving coil. 34 Then, try to get it around L4.

[0047] The first relay coil and the second relay coil of the energy relay module of the dual-coil wired series relay wireless power supply artificial urinary catheterization device provided in this embodiment are arranged as follows:

[0048] The first relay coil and the second relay coil are wired in series, the first relay coil is a planar circular spiral coil, and the second relay coil is a cylindrical solenoid coil. The relay coil in the energy relay module does not adopt the domino placement of a single coil or multiple coils of conventional wireless power transmission relay. This is because the receiving coil of the energy relay module must be placed in the urethra, and the available size in the urethra is very small, so it can only be designed as a solenoid coil with the length direction along the urethra axis. This determines that if the relay coil adopts a planar spiral coil, the plane of the planar spiral coil can only be placed horizontally with the urethra axis direction, so as to be parallel to the length direction of the solenoid coil of the energy receiving module, resulting in extremely small mutual inductance between the two, and energy cannot be transmitted wirelessly. Therefore, the energy relay module in this system adopts two coils, wherein the second relay coil adopts a cylindrical solenoid coil, which is placed outside the receiving coil and surrounds the receiving coil, and is coaxially placed with the receiving coil. The first relay coil adopts a planar circular spiral coil, and is placed parallel and coaxially with the transmitting coil. The first relay coil and the second relay coil are connected in series by wire, and then connected in series with the compensation capacitor C2 to form series compensation.

[0049] Secondly, the diameter of the Litz wire used in the first relay coil and the second relay coil is optimized. The energy transmitted from the energy relay module to the energy receiving module is proportional to the resistance in the reflected impedance reflected from the energy receiving module. 34 It is usually small (for example, about 1uH to 3uH), and the reflected impedance is also small. For this reason, it is necessary to use a Litz wire that is thicker than the Litz wire used in the coil in the energy receiving module to reduce the high-frequency resistance. For this reason, 0.1mm*15 strands of Litz wire are preferably used to make the first relay coil and the second relay coil. The resonant circuit of the energy relay module adopts an LCL series compensation design, that is, the energy relay module is designed so that the first relay coil inductance L2, the second relay coil inductance L3, and the compensation capacitor C2 satisfy:

[0050]

[0051] Wherein, ω is the resonant angular frequency. The first relay coil L2 is in the form of a planar circular spiral coil, wound with 16 turns of 0.1mm*15 strands of Litz wire, with an outer diameter of 32mm and an inductance of 3.7uH. The second relay coil L3 is in the form of a solenoid coil, with an outer diameter of 10mm. The winding length is preferably selected to be 18mm, and the inductance is 5.06uH. The resonance compensation capacitance value calculated according to formula (4) is 107nF.

[0052] The design of the mutual inductance between the second relay coil and the receiving coil includes:

[0053] For the LCC topology of the energy transmission module resonant circuit, when in full resonance and ignoring parasitic resistance, the value of the current i1 in the transmission coil L1 remains constant and is:

[0054]

[0055] In the formula, v s is the voltage in the energy transmission module, j is an imaginary unit, ω is the resonant angular frequency, L r To compensate for the inductance.

[0056] When the energy relay module resonant circuit and the energy receiving module resonant circuit are both fully resonant, their currents are

[0057]

[0058]

[0059] Where i2 is the current in the transmitting coil L2, i.e. the current in the resonant circuit of the energy relay module, ω is the resonant angular frequency, M 12 is the mutual inductance between the transmitting coil inductance L1 and the first relay coil inductance L2, i1 is the current in the transmitting coil L1, r2 is the second resistor connected in series with the first relay coil inductance L2, M 34 is the mutual inductance between the second relay coil inductance L3 and the receiving coil inductance L4, R L is the fourth resistor in the resonant circuit of the energy receiving module, r3 is the third resistor connected in series with the receiving coil inductor L4; i3 is the current in the receiving coil L4, that is, the current in the resonant circuit of the energy receiving module.

[0060] Substituting (5) and (6) into (7) yields the following equation:

[0061]

[0062] when

[0063]

[0064] When , the receiving end current i3 is the largest. When the resistance of the solenoid valve is constant, equation (9) can ensure that the receiving end obtains the maximum power, so it is required

[0065]

[0066] That is, by adjusting the self-inductance of the receiving coil of the energy receiving module (correspondingly adjusting the mutual inductance M with the second relay coil) 34), so that when the reflected impedance of the energy receiving module resonant circuit is equal to the parasitic resistance of the energy relay module resonant circuit, the maximum power can be obtained in the receiving module, thereby obtaining

[0067]

[0068] The high frequency resistances of the first relay coil L2 and the second relay coil L3 at 164kHz are 64mΩ and 222mΩ respectively. When the parasitic resistance of the resonant capacitor is ignored, r2 = 286mΩ. The selected electromagnet has a current of 100mA at 5V, so its resistance R L =50Ω, which is much larger than the parasitic resistance r3 of the energy receiving module resonant circuit. Therefore, r3 in formula (11) is ignored and calculated as

[0069]

[0070] In the formula, e is a natural constant;

[0071] After the test winding of the receiving module coil, when the length of L4 is 18mm, the inductance of L4 is 5.5uH, and the mutual inductance M 34 =3.28uH, and further calculated the resonant compensation capacitor C3 = 171nF according to formula (3), and measured its parasitic resistance r3 = 822mΩ, which is much smaller than the electromagnet resistance. Therefore, when calculating M 34 It is reasonable to ignore r3.

[0072] The dual-coil wired series relay wireless power supply artificial catheter device provided by the embodiment of the utility model installs a wireless power supply micro electromagnetic valve module in the urethra near the urethral sphincter to control the patient's urination. Compared with the prior art, there is no need to lead the catheter out of the body, avoiding possible bacterial infection problems. The system is equipped with an energy transmitting coil outside the body, a two-coil wired series relay is configured in the subcutaneous fat layer and the outside of the urethral tube in the body, and a solenoid valve module containing a wiring coil is configured in the urethra. When urination is required, the external energy transmitting coil is started, and the energy is transmitted to the receiving coil in the urethra through the two-coil wired series relay and the electromagnetic valve is opened to urinate. In this system, for this special application scenario, the external transmitting coil and the internal urethral receiving coil are respectively set to two different coil structures, namely a planar coil and a solenoid coil, while the traditional wireless energy transmission relay adopts a planar coil, which cannot achieve the problem of effective energy relay between two coils of different shapes. Therefore, the system proposes a method of using a two-coil wired series relay. The first relay coil uses a planar coil with the same structure as the external energy transmitting coil, and the second relay coil uses a solenoid coil with the same structure as the energy receiving coil in the urethra. The two relay coils are connected by wires to improve the coupling strength between the two relay coils and the transmitting coil and the receiving coil, respectively, thereby enhancing the energy transmission performance. This system also proposes a mutual inductance optimization design method for the second relay coil and the receiving coil in the urethra to address the problem of low transmission energy due to the limited size of the receiving coil in the urethra, which leads to low coupling with the second relay coil, and obtains the maximum power transmission to the receiving coil.

[0073] Although the preferred embodiments of the utility model embodiments have been described, those skilled in the art may make additional changes and modifications to these embodiments once they are aware of the basic creative concepts. Therefore, the attached claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the utility model embodiments. Finally, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or terminal device including a series of elements includes not only those elements, but also other elements that are not explicitly listed, or also includes elements inherent to such process, method, article or terminal device. In the absence of more restrictions, the elements defined by the sentence "including one..." do not exclude the existence of other identical elements in the process, method, article or terminal device including the elements.

[0074] The above is a detailed introduction to the dual-coil wired series relay wireless power supply artificial catheterization device provided in the embodiment of the present application. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the technical solution and its core idea of ​​the present application; ordinary technicians in this field should understand that: they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some of the technical features therein with equivalents; and these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of each embodiment of the present application.

Claims

1. A dual-coil wired series relay wireless power supply artificial urinary catheterization device, characterized in that: The dual-coil wired series relay wireless power supply artificial urinary catheterization device comprises: an energy transmission module, an energy relay module and an energy receiving module, wherein the energy transmission module is independent of the human body, and the energy relay module and the energy receiving module are arranged in the human body; The energy sending module is wirelessly connected to the energy relay module via magnetic resonance coupling, and the energy relay module is wirelessly connected to the energy receiving module via magnetic resonance coupling; the energy relay module includes a first relay coil and a second relay coil, and the first relay coil and the second relay coil are connected in series once via a wire; the first relay coil and the energy sending module are wirelessly connected to receive energy via magnetic resonance coupling, and the second relay coil and the energy receiving module are wirelessly connected to send energy via magnetic resonance coupling; the energy receiving module includes a receiving coil and a solenoid valve, and the energy receiving module receives energy and opens the solenoid valve to perform urination operation.

2. The double-coil wired series relay wireless power supply artificial urinary catheterization device according to claim 1, characterized in that: The energy sending module includes a DC voltage unit, a full-bridge inverter, a resonant element unit and a transmitting coil. The DC voltage unit, the full-bridge inverter, the resonant element unit and the transmitting coil are connected in series in sequence through wires. The transmitting coil is wirelessly connected to the first relay coil through magnetic resonance coupling. The transmitting coil sends energy to the first relay coil.

3. The double-coil wired series relay wireless power supply artificial urinary catheterization device according to claim 2, characterized in that: The energy relay module further includes a compensation capacitor, and the compensation capacitor is wired in series with the first relay coil and the second relay coil respectively.

4. The double-coil wired series relay wireless power supply artificial urinary catheterization device according to claim 3, characterized in that: The energy receiving module comprises a shell, inside which the receiving coil, the resonant capacitor, the rectifier bridge, the voltage stabilizer and the solenoid valve are sequentially arranged, and the solenoid valve is in the form of a cylindrical through-hole; The shell is implanted in a urinary catheter, and the on-off of the electromagnetic valve is controlled to control urinary catheterization. The receiving coil and the second relay coil are wirelessly connected to receive energy through magnetic resonance coupling to generate high-frequency induced voltage.

5. The double-coil wired series relay wireless power supply artificial urinary catheterization device according to claim 4, characterized in that: The transmitting coil is a planar circular spiral coil, and the first relay coil is a planar circular spiral coil.

6. The double-coil wired series relay wireless power supply artificial urinary catheterization device according to claim 5, characterized in that: The second relay coil is a cylindrical solenoid coil and is arranged outside the urethra to surround the urethra. The receiving coil is a cylindrical solenoid coil and is arranged in the inner central area of ​​the second relay coil and along the axis of the urethra.

7. The double-coil wired series relay wireless power supply artificial urinary catheterization device according to claim 6, characterized in that: The dual-coil wired series relay wireless power supply artificial catheterization device adopts LCC-SS topology, the energy sending module resonant circuit adopts LCC compensation topology, the energy relay module resonant circuit adopts dual coil and supplementary capacitor series compensation topology, and the energy receiving module resonant circuit adopts series compensation topology.

8. The double-coil wired series relay wireless power supply artificial urinary catheterization device according to claim 7, characterized in that: The first relay coil, the compensation capacitor and the second relay coil of the energy relay module resonant circuit adopt LCL series compensation, the first relay coil is coupled with the transmitting coil, and the second relay coil is coupled with the receiving coil.

9. The double-coil wired series relay wireless power supply artificial urinary catheterization device according to claim 7, characterized in that: The length direction of the second relay coil and the receiving coil is the axial direction of the urethra, and the mutual inductance between the second relay coil and the receiving coil is controlled by setting the coupling length in the same direction.

10. The double-coil wired series relay wireless power supply artificial urinary catheterization device according to claim 9, characterized in that: The reflected impedance of the energy receiving module resonant circuit to the second relay coil is equal to the parasitic impedance of the energy relay module resonant circuit.

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