Shock wave generation method and shock wave system

Abstract

The invention provides a shock wave generating method. The shock wave generating method comprises the following steps that a boosting module charges an energy storage capacitor; when the voltage of the energy storage capacitor reaches a set value, the boosting module stops charging the energy storage capacitor, and the energy storage capacitor charges the energy relay capacitor and the shock wave electrode; when the voltage at the two ends of the shock wave electrode reaches the breakdown voltage of the shock wave electrode, the energy relay capacitor stops charging and discharges to the shock wave electrode, the energy storage capacitor continues to discharge to the shock wave electrode, and the shock wave electrode discharges, breaks down and releases shock waves. The invention further provides a shock wave system for implementing the shock wave generation method. The peak value and the pulse width of the pulse current formed by the circuit where the shock wave electrode is located when the shock wave electrode releases shock waves are improved, namely, the pulse energy of the pulse current is improved, so that the shock wave energy released by the shock waves released by the shock wave electrode is effectively improved, and dependence of the shock wave energy on an electrode structure is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of hydraulic-electric shock waves, and in particular to a shock wave generating method and a shock wave system. Background Art

[0002] Liquid-electric shock wave technology is widely used in the treatment of extracorporeal kidney lithotripsy, peripheral vascular calcification, coronary artery stent implantation and pain relief (such as muscle pain). The existing liquid-electric shock wave system includes an energy storage capacitor arranged in a high-voltage pulse power supply and a shock wave electrode electrically connected to the energy storage capacitor. The shock wave electrode is charged by the energy storage capacitor. When the voltage at both ends of the shock wave electrode reaches the breakdown voltage of the shock wave electrode, the shock wave electrode discharges, breaks down and releases a shock wave. The existing liquid-electric shock wave system cannot form a pulse current with a higher peak value, so it cannot release a shock wave with a higher intensity.

[0003] Currently, there is no workaround for this issue. Summary of the invention

[0004] In view of this, the present invention provides a shock wave generating method and a shock wave system. By setting an energy relay capacitor, the peak value of the pulse current when releasing the shock wave is increased, so that the shock wave electrode releases a shock wave with greater intensity, which can greatly improve the therapeutic effect of a single effective shock wave. At the same time, the heat loss of the shock wave electrode in the pre-breakdown stage is reduced, the melting loss of the shock wave electrode is effectively reduced, and the number of times the shock wave electrode releases effective shock waves is effectively increased, thereby achieving the ultimate treatment purpose.

[0005] The present invention provides the following technical solution: a shock wave generating method, comprising the following steps:

[0006] The boost module charges the energy storage capacitor;

[0007] When the voltage of the energy storage capacitor reaches the set value, the boost module stops charging the energy storage capacitor, and the energy storage capacitor charges the energy relay capacitor and the shock wave electrode;

[0008] When the voltage across the shock wave electrode reaches the breakdown voltage of the shock wave electrode, the energy relay capacitor stops charging and discharges to the shock wave electrode, and the energy storage capacitor continues to discharge to the shock wave electrode, and the shock wave electrode discharges, breaks down and releases the shock wave.

[0009] A shock wave system is used to implement the shock wave generation method, comprising a high-voltage pulse power supply, a shock wave guide tube and an energy relay capacitor; the high-voltage pulse power supply comprises a power module and a switch-type electronic component, the power module comprises a boost module and an energy storage capacitor electrically connected to each other; the shock wave guide tube comprises a shock wave electrode, the power module, the shock wave electrode and the switch-type electronic component are electrically connected; one end of the energy relay capacitor is electrically connected to one end of the shock wave electrode, and the other end of the energy relay capacitor is electrically connected to the other end of the shock wave electrode.

[0010] Compared with the prior art, the beneficial effects that can be achieved by at least one of the above-mentioned technical solutions adopted in the embodiments of this specification include at least the following: the present invention improves the peak value and pulse width of the pulse current formed by the circuit where the shock wave electrode is located when the shock wave electrode releases the shock wave, that is, improves the pulse energy of the pulse current, thereby effectively improving the shock wave energy released by the shock wave electrode, and avoiding the dependence of the shock wave energy on the electrode structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0012] Figure 1 It is a schematic diagram of the circuit principle of the prior art solution;

[0013] Figure 2 It is a schematic diagram of equipment connection of the technical solution of the present invention;

[0014] Figure 3 is a schematic diagram of the circuit principle of the first embodiment of the first implementation mode of the present invention;

[0015] Figure 4 is a schematic diagram of the circuit principle of the second embodiment of the first embodiment of the present invention;

[0016] Figure 5 is a schematic diagram of the circuit principle of the third embodiment of the first embodiment of the present invention;

[0017] Figure 6 is a schematic diagram of the circuit principle of the fourth embodiment of the first embodiment of the present invention;

[0018] Figure 7 is a schematic diagram of the circuit principle of the fifth embodiment of the first embodiment of the present invention;

[0019] Figure 8 is a schematic diagram of the circuit principle of the sixth embodiment of the first embodiment of the present invention;

[0020] Fig. 9 is a schematic diagram of the circuit principle of the seventh embodiment of the first embodiment of the present invention;

[0021] Fig.10 is a schematic diagram of the circuit principle of the first embodiment of the second implementation mode of the present invention;

[0022] Fig.11 is a schematic diagram of the circuit principle of a second example of the second implementation mode of the present invention;

[0023] Fig.12 is a schematic diagram of the circuit principle of the third embodiment of the second implementation mode of the present invention;

[0024] Fig.13 is a schematic diagram of the circuit principle of the fourth embodiment of the second embodiment of the present invention;

[0025] Fig.14 is a schematic diagram of the circuit principle of the fifth embodiment of the second embodiment of the present invention;

[0026] Fig.15 is a schematic diagram of the circuit principle of the first embodiment of the third implementation mode of the present invention;

[0027] Fig.16 is a schematic diagram of the circuit principle of the second embodiment of the third embodiment of the present invention;

[0028] Fig.17 is a schematic diagram of the circuit principle of a third example of the third implementation mode of the present invention;

[0029] Fig.18 is a schematic diagram of the circuit principle of the fourth embodiment of the third embodiment of the present invention;

[0030] Fig.19 is a schematic diagram of the circuit principle of a fifth embodiment of the third embodiment of the present invention;

[0031] Fig. 20 is a schematic diagram of the circuit principle of the first embodiment of the fourth implementation mode of the present invention;

[0032] Fig.21 is a schematic diagram of the circuit principle of the second embodiment of the fourth embodiment of the present invention;

[0033] Fig. 22 is a schematic diagram of the circuit principle of the third embodiment of the fourth implementation mode of the present invention;

[0034] Fig.23 is a schematic diagram of a circuit principle of a fourth example of a fourth implementation mode of the present invention;

[0035] Fig.24is a schematic diagram of the circuit principle of the fifth embodiment of the fourth embodiment of the present invention;

[0036] Fig.25 is a schematic diagram of the circuit principle of the first embodiment of the fifth implementation mode of the present invention;

[0037] Fig.26 is a schematic diagram of the circuit principle of the second embodiment of the fifth embodiment of the present invention;

[0038] Fig. 27 is a schematic diagram of the circuit principle of the third embodiment of the fifth implementation mode of the present invention;

[0039] Fig.28 It is a schematic diagram of the circuit principle of the sixth embodiment of the present invention.

[0040] Fig.29 It is a schematic diagram of the circuit principle of the seventh embodiment of the present invention.

[0041] Reference numerals in the figure: 10, high-voltage pulse power supply; 11, boost module; 12, control module; 20, connection component; 30, shock wave guide tube; 31, shock wave electrode; 100, high-voltage pulse power supply; 101, boost module; 102, control module; 200, connection component; 300, shock wave guide tube; 301, shock wave electrode. DETAILED DESCRIPTION

[0042] The embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0043] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0044] The shock wave electrode is equivalent to a capacitor when it is not broken down, and is equivalent to an inductor after the discharge breakdown. When the intensity of a single shock wave is large enough, the impact of the single shock wave can loosen or crack the calcified lesion tissue in the treated area, that is, the single shock wave has a therapeutic effect, and the single shock wave is referred to as an effective shock wave in this article. A single discharge breakdown of a shock wave electrode can release an effective shock wave, and the single discharge breakdown is referred to as an effective discharge breakdown in this article.

[0045] In order to achieve the discharge breakdown of the shock wave electrode to release a shock wave with a therapeutic effect, the existing liquid-electric shock wave system is electrically connected with a switch-type component in the discharge circuit. The energy storage capacitor charges the shock wave electrode when the switch-type component is disconnected, and discharges when the switch-type component is connected. When the voltage at both ends of the shock wave electrode reaches its breakdown voltage, the shock wave electrode discharges and breaks down to form a shock wave. When other conditions such as the shock wave electrode structure and voltage are basically the same, the intensity of the shock wave is positively correlated with the peak value of the pulse current. It can be seen that the intensity of the shock wave released by the existing liquid-electric shock wave system is positively correlated with the peak value of the pulse current that the switch-type component can pass. GDT (GasDischarge Tube, gas discharge tube) is selected as a switch-type electronic component by the existing liquid-electric shock wave system because of its large current capacity, small static capacitance, and small voltage at both ends after conduction, in order to form a shock wave of greater intensity. The junction capacitance of GDT is low; in the disconnected state, it is equivalent to an open circuit with a large resistance; after breakdown, it is equivalent to a short circuit, and a large current can pass through, with a small voltage drop.

[0046] like Figure 1 As shown, the existing liquid-electric shock wave system generally includes a high-voltage pulse power supply 100 and a shock wave catheter 300. The high-voltage pulse power supply 100 includes at least a boost module 101 and an energy storage capacitor C0 (hereinafter referred to as C0) electrically connected to each other. The high-voltage pulse power supply 100 further includes a control module 102 electrically connected to the boost module 101 and used to control the opening and closing of the boost module 101, and a rectifier diode D0 (hereinafter referred to as D0) electrically connected to the boost module 101 and C0 and used to convert alternating current into direct current and limit the flow of current. The high-voltage pulse power supply 100 also includes a gas discharge tube GDT0 (hereinafter referred to as GDT0) electrically connected to each other and a current limiting resistor R0 (hereinafter referred to as R0) used to adjust the freewheeling size of GDT0. The shock wave catheter 300 includes a shock wave electrode 301, which is located at the treatment end of the shock wave catheter 300. The shock wave electrode 301 is electrically connected to C0 and GDT0 through a connecting component 200 (commonly used as a connecting cable). In the figure, R10 is the equivalent resistance for connecting the negative electrode in the connecting component 200, and R20 is the equivalent resistance for connecting the positive electrode in the connecting component 200, which does not reflect the internal resistance of the high-voltage pulse power supply 100 and the shock waveguide tube 300. Among them, the control module 102 can adopt the existing microcontroller DSP (Digital Signal Processing, digital signal processing technology) chip, MCU (Microcontroller Unit, micro control unit), FPGA (Field Programmable Gate Array, field programmable logic gate array), and the common control module 102 on the market that can control the boost module 101 can be used.

[0047] The single discharge breakdown process of the shock wave electrode 301 is divided into two stages. In the initial state, the GDT0 and the boost module 101 are both in the disconnected state.

[0048] Phase 1: Charging. The control module 102 controls the boost module 101 to start, and the boost module 101 charges C0, and the voltage at both ends of C0 continues to increase. The voltage at both ends of C0 is divided by the shock wave electrode 301, R0 and GDT0, and there is no current in the circuit where the shock wave electrode 301 and GDT0 are located.

[0049] The second stage: pre-breakdown and release of shock wave. When the voltage across the shock wave electrode 301 reaches its breakdown voltage and the voltage across GDT0 reaches its discharge voltage, the control module 102 controls the boost module 101 to disconnect. At the same time, the shock wave electrode 301 and GDT0 are both broken down and turned on, and the internal resistance of the shock wave electrode 301 and the internal resistance of GDT0 are both extremely low. The electric energy in C0 is released to the shock wave electrode 301 and GDT0 in the direction of the arrow in the figure, and a pulse current is formed in the circuit. When the voltage across GDT0 drops below its discharge voltage, GDT0 is disconnected, the shock wave is released, and the entire liquid-electric shock wave system returns to its initial state. In this process, through the pulse current flowing through the shock wave electrode 301, the electric energy released by C0 to the shock wave electrode 301 and the electric energy stored in the shock wave electrode 301 during the charging stage are converted into a large amount of heat energy and mechanical energy, and a large amount of heat and shock waves carrying mechanical energy are released through the discharge breakdown of the shock wave electrode 301.

[0050] In the stage of pre-breakdown and release of shock wave, C0 is discharged through the discharge circuit composed of C0, connection assembly 200, shock wave electrode 301, R0 and GDT0. When shock wave electrode 301 discharges, breaks down and releases shock wave, the greater the energy of the pulse current flowing through shock wave electrode 301, the greater the mechanical energy carried by shock wave, and the better the therapeutic effect of shock wave. Although gas discharge tube can generate a large energy shock wave through a large current, its on and off are not controlled, that is, the pulse width of pulse current cannot be controlled, and because its working principle is air breakdown conduction, its service life is short, so that the existing liquid-electric shock wave system cannot release enough shock waves, which limits the therapeutic effect of shock wave. In recent years, switch-type components have also appeared SCR (Silicon Controlled Rectifier, silicon-controlled rectifier), MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor, metal-oxide semiconductor field effect transistor) and IGBT (Insulate-Gate Bipolar Transistor, insulated gate bipolar transistor). Among them, SCR can only control its conduction but not its shutdown. The current that MOSFET can withstand is much smaller than that of IGBT. IGBT is favored because of its short switching time and ability to withstand high power. However, the current that IGBT discrete components can withstand generally does not exceed 100A, making it difficult to generate large shock wave energy. If you want to achieve large shock wave energy, you need to use IGBT modules or MOSFET modules, both of which are large and expensive, which poses challenges to cost saving and miniaturization design.

[0051] Based on this, the present application provides a shock wave generating method, comprising the following steps:

[0052] Step 1: Energy storage stage, the energy storage capacitor stores energy; the boost module 11 charges the energy storage capacitor C1;

[0053] Step 2: In the charging stage, the energy relay capacitor and the shock wave electrode are charged; when the voltage of the energy storage capacitor C1 reaches the set value, the boost module 11 stops charging the energy storage capacitor C1, and the energy storage capacitor C1 charges the energy relay capacitor C2 and the shock wave electrode 31;

[0054] Step 3: In the release phase, the shock wave electrode pre-breaks down and releases the shock wave; when the voltage across the shock wave electrode 31 reaches the breakdown voltage of the shock wave electrode 31, the shock wave electrode 31 discharges and breaks down, the energy relay capacitor C2 stops charging and discharges to the shock wave electrode 31, and the energy storage capacitor C1 continues to discharge to the shock wave electrode 31, and the shock wave electrode 31 discharges and breaks down and generates a shock wave.

[0055] Compared with the prior art, the shock wave generating method provided by the embodiment of the present invention sets an energy relay capacitor C2 as an energy node between the energy storage capacitor C1 and the shock wave electrode 31, so that the energy storage capacitor C1 first charges the energy relay capacitor C2 and the shock wave electrode 31, and then both the energy storage capacitor C1 and the energy relay capacitor C2 discharge to the shock wave electrode 31. Through the energy storage effect of the energy relay capacitor C2, a pulse current with high amplitude and long pulse width is realized in the circuit in which the energy storage capacitor C1 and the energy relay capacitor C2 discharge to the shock wave electrode 31, so that the shock wave electrode 31 can release a shock wave with higher energy; at the same time, in the pre-breakdown stage of the shock wave electrode 31, through the shunting effect of the energy relay capacitor C2, the loss of the shock wave electrode 31 due to melting and ablation can be effectively reduced, and the service life of the shock wave electrode 31 is effectively extended, so that the shock wave electrode 31 can release a sufficient number of shock waves to achieve a better therapeutic effect.

[0056] In the charging stage of step 2, i.e., the stage in which the energy storage capacitor C1 charges the energy relay capacitor C2 and the shock wave electrode 31, a portion of the electric energy of the energy storage capacitor C1 is stored in the shock wave electrode 31 through the current, and another portion of the electric energy is stored in the energy relay capacitor C2 through the current. Compared with the prior art, the current flowing through the shock wave electrode 31 is effectively reduced through the energy storage and shunting of the energy relay capacitor C2, thereby effectively reducing the electric energy lost by the shock wave electrode 31 at this stage.

[0057] The energy storage capacitor C1 continues to charge the shock wave electrode 31 until reaching the release stage of step 3, where the shock wave electrode pre-breaks down and discharges and breaks down until a shock wave carrying mechanical energy is released.

[0058] When the voltage at both ends of the shock wave electrode 31 reaches the breakdown voltage of the shock wave electrode 31, the shock wave electrode 31 enters the pre-breakdown stage, at which time, the shock wave electrode 31 begins to melt and ablate. Due to the shunting of the energy relay capacitor C2, the current flowing through the shock wave electrode 31 is effectively reduced. Therefore, the electric energy consumed by the shock wave electrode 31 in the pre-breakdown stage is reduced, and the heat energy converted into the shock wave electrode 31 by the consumed electric energy is also reduced accordingly. The loss of the shock wave electrode 31 caused by the melting and ablation of the heat energy is also reduced, which prolongs the service life of the shock wave electrode 31. Therefore, in step 3, through the shunting of the energy relay capacitor C2, not only the electric energy lost on the shock wave electrode 31 is further effectively reduced, but also the service life of the shock wave electrode 31 can be effectively extended. Among them, the service life of the shock wave electrode 31 refers to the number of effective shock waves released by the discharge breakdown of the shock wave electrode 31. An effective shock wave refers to a shock wave that has a therapeutic effect on the tissue to be treated.

[0059] The shock wave electrode 31 quickly passes through the pre-breakdown and enters the discharge breakdown. It is known from the prior art that the moment when the shock wave electrode 31 discharges and breaks down is equivalent to inductance, causing the electric energy of the energy storage capacitor C1 to be completely released to the shock wave electrode 31. At the same time, the energy relay capacitor C2 stops charging and starts to discharge to the shock wave electrode 31. In the process in which both the energy storage capacitor C1 and the energy relay capacitor C2 discharge to the shock wave electrode 31, compared with the prior art, more electric energy is released to the shock wave electrode 31, so that the circuit where the shock wave electrode 31 is located instantly forms a pulse current with a higher peak value and a larger pulse width. As a result, the shock wave electrode 31 can convert more electric energy into mechanical energy, so that the shock wave electrode 31 releases a shock wave carrying a larger mechanical energy, which effectively improves the therapeutic effect of the shock wave. Further, in a specific embodiment, the present invention also includes the following steps:

[0060] When the voltage of the energy relay capacitor C2 reaches at least the breakdown voltage of the shock wave electrode 31 , the voltage across both ends of the shock wave electrode 31 reaches the breakdown voltage of the shock wave electrode 31 .

[0061] When one end of the shock wave electrode 31 is electrically connected to one end of the energy relay capacitor C2, and the other end of the shock wave electrode 31 is electrically connected to the other end of the energy relay capacitor C2, the voltage across the shock wave electrode 31 and the voltage across the energy relay capacitor C2 are almost equal. Considering that due to the resistance of the connecting wires in the circuit, the voltage of the energy relay capacitor C2 at least reaches the breakdown voltage of the shock wave electrode 31, that is, when the voltage of the energy relay capacitor C2 reaches or exceeds the breakdown voltage of the shock wave electrode 31, the voltage across the shock wave electrode 31 can reach the breakdown voltage of the shock wave electrode 31, as described above, at this time, the energy relay capacitor C2 stops charging and discharges to the shock wave electrode 31, and the energy storage capacitor C1 continues to discharge to the shock wave electrode 31, and the shock wave electrode 31 discharges, breaks down and releases a shock wave, which carries a large mechanical energy and has a good therapeutic effect.

[0062] Further, in another specific embodiment, when the voltage of the energy relay capacitor C2 reaches at least the sum of the breakdown voltage of the shock wave electrode 31 and the breakdown voltage of the voltage limiting protection component, the voltage across the shock wave electrode 31 reaches the breakdown voltage of the shock wave electrode 31 .

[0063] The shock wave electrode 31 can be further electrically connected to the voltage-limiting protection component, that is, one end or the other end of the shock wave electrode 31 is electrically connected to one end or the other end of the voltage-limiting protection component. The shock wave electrode 31 and the voltage-limiting protection component electrically connected to each other have one end electrically connected to one end of the energy relay capacitor C2, and the other end electrically connected to the other end of the energy relay capacitor C2. At this time, the voltage across the energy relay capacitor C2 is almost equal to the sum of the voltage across the shock wave electrode 31 and the voltage across the voltage-limiting protection component. Considering the resistance of the connecting wires and the like in the circuit, when the voltage of the energy relay capacitor C2 at least reaches the sum of the breakdown voltage of the shock wave electrode 31 and the breakdown voltage of the voltage-limiting protection component, that is, when the voltage of the energy relay capacitor C2 reaches or exceeds the sum of the breakdown voltage of the shock wave electrode 31 and the breakdown voltage of the voltage-limiting protection component, the voltage at both ends of the shock wave electrode 31 can reach the breakdown voltage of the shock wave electrode 31. As mentioned above, at this time, the energy relay capacitor C2 stops charging and discharges to the shock wave electrode 31, and the energy storage capacitor C1 continues to discharge to the shock wave electrode 31. The shock wave electrode 31 discharges, breaks down, and releases a shock wave, which carries a large mechanical energy and has a good therapeutic effect. Compared with the previous specific embodiment, the current in the circuit where the shock wave electrode 31 is located is further reduced, the power loss on the shock wave electrode 31 is also further reduced, and the service life of the shock wave electrode 31 is further extended. Moreover, due to the presence of the voltage-limiting protection component, the voltage across the energy relay capacitor C2 is effectively increased, and the electric energy stored in the energy relay capacitor C2 is also effectively increased. In the process in which the energy storage capacitor C1 and the energy relay capacitor C2 are both discharged to the shock wave electrode 31, the shock wave electrode 31 is able to convert more electric energy into mechanical energy, further increasing the mechanical energy carried by the shock wave released by the shock wave electrode 31, even if the shock wave further has a better therapeutic effect. The shock wave generation method of the present invention can effectively increase the peak value of the pulse current flowing through the shock wave electrode 31 when the shock wave electrode 31 discharges and breaks down to release the shock wave, so that a high-energy shock wave is formed when the shock wave electrode 31 discharges and breaks down, thereby improving the therapeutic effect of the shock wave, and can extend the service life of the shock wave electrode 31, so that the shock wave electrode 31 can release a sufficient number of shock waves with therapeutic effects to achieve the ultimate therapeutic purpose.

[0064] like Figures 2 to 29As shown, the present application also provides a shock wave system for implementing the aforementioned shock wave generating method, comprising a high-voltage pulse power supply 10, a shock wave guide tube 30 and an energy relay capacitor C2 (referred to herein as C2); the high-voltage pulse power supply 10 comprises a power supply module and a switching type electronic component, the power supply module comprises a boost module 11 and an energy storage capacitor C1 (referred to herein as C1) electrically connected to each other; the shock wave guide tube 30 comprises a shock wave electrode 31; the power supply module, the shock wave electrode 31 and the switching type electronic component are electrically connected; one end of the energy relay capacitor C2 is electrically connected to one end of the shock wave electrode 31, and the other end of the energy relay capacitor C2 is electrically connected to the other end of the shock wave electrode 31.

[0065] Among them: the boost module 11 and the energy storage capacitor C1 electrically connected to each other means that one end of the boost module 11 is electrically connected to one end of C1, and the other end of the boost module 11 is electrically connected to the other end of C1; the power module, the shock wave electrode 31 and the switching type electronic components are electrically connected, which means that the three are electrically connected to the same single circuit. It should be noted that the electrical connection referred to in this article refers to a way of connecting electrical equipment or components to each other through wires, cables or other types of wires to achieve current transmission and signal exchange. It can be permanent or detachable, depending on the type of connector used and the application scenario.

[0066] The shock wave system provided by the embodiment of the present invention can implement the aforementioned shock wave generating method, and can effectively increase the peak value of the pulse current flowing through the shock wave electrode 31 when the shock wave electrode 31 discharges and breaks down to release the shock wave, so that a high-energy shock wave is formed when the shock wave electrode 31 discharges and breaks down, thereby improving the therapeutic effect of the shock wave, and can extend the service life of the shock wave electrode 31, so that the shock wave electrode 31 can release a sufficient number of shock waves with therapeutic effects to achieve the ultimate therapeutic purpose.

[0067] Preferably, the capacitance value of the energy relay capacitor C2 is greater than or equal to the equivalent capacitance value of the shock wave electrode 31 and less than the capacitance value of the energy storage capacitor C1.

[0068] Because the discharge breakdown of the liquid-electric shock wave electrode is an ionization process, and the breakdown voltage of the shock wave electrode is a range value, not a fixed value. Within the range of the shock wave electrode breakdown voltage, if the voltage at both ends of the shock wave electrode is higher, the ionization time required for the shock wave electrode discharge breakdown is shorter, and if the voltage at both ends of the shock wave electrode is lower, the ionization time required for the shock wave electrode discharge breakdown is longer. Therefore, if the capacitance value of C2 is too large, for example, greater than or equal to the capacitance value of C1, on the one hand, the charging of the shock wave electrode 31 will be relatively slow, and on the other hand, C2 will divide too much electric energy so that the shock wave electrode 31 discharges and breaks down at a relatively low breakdown voltage. Although the shock wave electrode 31 can still release a shock wave carrying a large mechanical energy, the peak value of the pulse current of the shock wave electrode 31 during the discharge and breakdown will be relatively low, so the mechanical energy carried by the shock wave will also be relatively low; at the same time, the capacitance value of C2 cannot be too small, for example, less than the equivalent capacitance value of the shock wave electrode 31, which will result in that when the shock wave electrode 31 discharges and breaks down, the electric energy stored in C2 is less than the electric energy stored in the shock wave electrode 31, and the mechanical energy carried by the shock wave released by the shock wave electrode 31 is limited. By adjusting the capacitance value of the energy relay capacitor C2, the characteristics of the shock wave can be optimized, so that it can adapt to different treatment needs or application scenarios, and improve the flexibility and effectiveness of treatment. From the above, it can be seen that the capacitance value of the energy relay capacitor C2 has an optimal value. When the capacitance value of the energy relay capacitor C2 is the optimal value, the shock wave released by the discharge and breakdown of the shock wave electrode 31 can carry the maximum mechanical energy, that is, the shock wave released by the discharge and breakdown of the shock wave electrode 31 has the maximum intensity.

[0069] Thus, the shock wave generating method further includes adjusting the value of the energy relay capacitor C2 to change the pulse width of the pulse current:

[0070] When the value of the energy relay capacitor C2 decreases, the pulse width of the generated pulse current shortens;

[0071] When the value of the energy relay capacitor C2 increases, the pulse width of the generated pulse current increases.

[0072] The equivalent capacitance in this article refers to the capacitance value of two or more capacitors when they are connected in a circuit. In a combination of capacitors in series or parallel, a single equivalent capacitance value can be obtained through a specific calculation method. This value can represent the total energy storage effect of the entire capacitor combination. In practical applications, the concept of equivalent capacitance helps to simplify the analysis of complex circuits.

[0073] like Figures 3 to 29 As shown, the high-voltage pulse power supply 10 in the embodiment of the present invention further includes a rectifier diode D1 electrically connected between the boost module 11 and the energy storage capacitor C1, which is used to convert alternating current into direct current and limit the current flow direction; and / or,

[0074] The high-voltage pulse power supply 10 further includes a current-limiting resistor R3 electrically connected to the switch-type electrical component and used to adjust the freewheeling current of the switch-type component; and / or,

[0075] The switch-type electronic components are IGBT, GDT, SCR or MOSFET. If there are other controllable electronic switches suitable for the embodiments of the present application, when they are applied to the circuits of the embodiments of the present application, they still belong to the protection scope of the present application. In the process of the shock wave system releasing a large number of shock waves, the switch-type components (such as GDT, IGBT, SCR, MOSFET) will be frequently turned on and off, causing the boost module 11 to generate a lot of high-frequency noise (electromagnetic waves) when working. The high-frequency noise radiates outward and causes serious electromagnetic interference to the surrounding electronic equipment. The energy relay capacitor C2 is electrically connected to the boost module 11 and the switch-type electronic components, and can absorb the high-frequency signal components generated by the boost module 11 due to the conduction and shutdown of the switch-type electronic components, greatly reducing the high-frequency noise radiated outward, and has the technical effect of reducing high-frequency noise and electromagnetic interference.

[0076] like Figures 3 to 29 As shown, the shock wave system in the embodiment of the present invention further includes a connecting component 20, through which the shock wave guide tube 30 is electrically connected to the high-voltage pulse power supply 10; R1, R11, R12, R2, R21 and R22 shown in the figure are equivalent resistances of different connecting parts of the connecting component 20; and,

[0077] like Figures 3 to 9 As shown, the energy relay capacitor C2 is arranged at the high-voltage pulse power supply 10, and is electrically connected to the power supply module and the switch-type components, and the energy relay capacitor C2 is electrically connected to the shock wave electrode 31 through the connecting component 20; or,

[0078] like Figures 10 to 24 As shown, the energy relay capacitor C2 is arranged at the connection component 20; through the connection component 20, the energy relay capacitor C2 is electrically connected to the power module and the switch type components, and the energy relay capacitor C2 is electrically connected to the shock wave electrode 31 through the connection component 20; wherein, Figures 10 to 14 C2 is set near the high voltage pulse power supply 10. Figures 15 to 19 C2 is arranged in the middle of the connecting assembly 20. Figure 20 to Figure 24 C2 is disposed adjacent to the shock wave guide tube 30; or,

[0079] like Figure 25 to Figure 29 As shown, the energy relay capacitor C2 is arranged at the shock wave guide tube 30; through the connecting assembly 20, the energy relay capacitor C2 and the shock wave electrode 31 which are electrically connected to each other are electrically connected to the power module and the switch type components.

[0080] In the shock wave system, the high voltage pulse power source 10 needs to be connected to the shock wave electrode 31 through its own wire, the connecting assembly 20 (usually a connecting cable, whose resistances are R1 and R2 respectively) and the wire in the shock wave guide tube 30. The parasitic impedance of the connecting assembly 20 and the wire in the shock wave guide tube 30 will weaken the current in the circuit, especially weaken the pulse current generated when the shock wave is released, thereby reducing the shock wave energy. Therefore, the shorter the connecting assembly 20 and the wire in the shock wave guide tube 30 between the energy relay capacitor C2 and the shock wave electrode 31, the smaller the parasitic resistance, the smaller the weakening effect of the parasitic resistance on the pulse current generated when the shock wave is released, the greater the mechanical energy carried by the shock wave released by the shock wave electrode 31 during discharge breakdown, and the greater the therapeutic effect of the shock wave.

[0081] The main purpose of moving the position of the energy relay capacitor C2 is to improve the energy utilization rate, thereby increasing the energy of the middle wave. The principle is to transfer the influence of the loop impedance from the discharge period of the energy relay capacitor C2 to the charging period, and the generation of shock waves is mainly in the discharge period. The increase in the impedance during the charging period does not affect the final energy release (just slightly prolong the charging time), while the impedance during the discharge period directly affects the discharge current. The size of the discharge current will directly affect the release of shock wave energy. The impedance of the discharge loop becomes smaller and the discharge current becomes larger, so this transfer can effectively increase the shock wave energy.

[0082] Therefore, the shock wave generating method of the present application also includes the following steps: adjusting the position of the energy relay capacitor C2 so that the energy relay capacitor C2 is arranged close to the shock wave electrode 31, so that the present application can generate a shock wave with greater energy and further improve the therapeutic effect of the shock wave.

[0083] The shock wave system also includes a voltage-limiting protection component, which is electrically connected to both the energy relay capacitor C2 and the shock wave electrode 31; wherein the voltage-limiting protection component is in an off state when the voltage at both ends does not reach the breakdown voltage, and is in an on state when the voltage at both ends reaches the breakdown voltage. Figures 4 to 9 , Figures 10 to 14 , Figures 16 to 19 , Figure 21 to Figure 24 and Figure 26 to Figure 29 As shown, the shock wave electrode 31 is further electrically connected to the voltage-limiting protection component, that is, one end or the other end of the shock wave electrode 31 is electrically connected to one end or the other end of the voltage-limiting protection component. The shock wave electrode 31 and the voltage-limiting protection component electrically connected to each other have one end electrically connected to one end of the energy relay capacitor C2, and the other end electrically connected to the other end of the energy relay capacitor C2. At this time, the voltage across the energy relay capacitor C2 is almost equal to the sum of the voltage across the shock wave electrode 31 and the voltage across the voltage-limiting protection component.

[0084] Preferably, the voltage-limiting protection component is a gas discharge tube or a varistor.

[0085] "Varistor" is a resistor device with nonlinear volt-ampere characteristics, mainly used to clamp voltage when the circuit is subjected to overvoltage, absorbing excess current to protect sensitive devices. The English name is "Voltage Dependent Resistor", abbreviated as "VDR", or "Varistor".

[0086] When the energy relay capacitor C2 is set in the high voltage pulse power supply 10:

[0087] like Figure 4 and Figure 5 As shown, when the gas discharge tube GDT1 (herein referred to as GDT1) is arranged in the high voltage pulse power supply 10, the GDT1 is electrically connected to any position between the energy relay capacitor C2 and the connection component 20;

[0088] like Figure 6 and Figure 7 As shown, the GDT1 is disposed in the connection component 20 and is electrically connected to any position of the connection component 20;

[0089] like Figure 8 and Fig. 9 As shown, the GDT 1 is disposed in the shock wave guide tube 30 and is electrically connected to any position between the connection assembly 20 and the shock wave electrode 31 .

[0090] When the energy relay capacitor C2 is disposed in the connection component 20 and close to the high voltage pulse power supply 10:

[0091] like Fig.11 and Fig.12 As shown, GDT1 is arranged on the connection component 20, and is electrically connected to any position on the connection component 20, and can be arranged adjacent to the energy relay capacitor C2 as shown in the figure, or can be arranged adjacent to the shock wave guide tube 30 which is not shown in the figure;

[0092] like Fig.13 and Fig.14 As shown, the GDT 1 is disposed in the shock wave guide tube 31 and is electrically connected to any position between the connection assembly 20 and the shock wave electrode 31 .

[0093] When the energy relay capacitor C2 is disposed in the middle of the connecting component 20:

[0094] like Fig.16 and Fig.17 As shown, the GDT1 is disposed in the connection assembly 20 and electrically connected to any position between the energy relay capacitor C2 and the shock wave guide tube 30;

[0095] like Fig.18 and Fig.19 As shown, the GDT 1 is disposed in the shock wave guide tube 31 and is electrically connected to any position between the connection assembly 20 and the shock wave electrode 31 .

[0096] When the energy relay capacitor C2 is disposed in the connection assembly 20 and adjacent to the shock wave guide tube 30:

[0097] like Fig.21 and Fig. 22 As shown, the GDT1 is disposed in the connection assembly 20 and electrically connected to any position between the energy relay capacitor C2 and the shock wave guide tube 30;

[0098] like Fig.23 and Fig.24 As shown, the GDT 1 is disposed in the shock wave guide tube 30 and is electrically connected to any position between the connection assembly 20 and the shock wave electrode 31 .

[0099] When the energy relay capacitor C2 is disposed in the shock wave guide tube 30:

[0100] like Figures 26 to 27 As shown, the GDT 1 is disposed in the shock wave guide tube 30 and is electrically connected to any position between the connection assembly 20 and the shock wave electrode 31).

[0101] All GDT1 can be replaced by varistors, such as Fig.28 As shown, Fig.26 The GDT1 in the figure is replaced by the varistor VDR1. All IGBT1 can also be replaced by other available switching components, such as Fig.29 As shown, Fig. 27 The IGBT1 is replaced by the air discharge tube GDT2, and the control module 12 here is only used to control the opening and closing of the boost module 11.

[0102] The three stages of the working process of the shock wave system of the present application are described below with reference to the accompanying drawings.

[0103] by Figure 3 For example, the boost module 11, the rectifier diode D1 and the energy storage capacitor C1 form an energy storage circuit, C2, R3 and IGBT1 form a charging circuit, the charging circuit is electrically connected to both ends of the energy storage capacitor C1, the circuit where the shock wave electrode 31 and the connecting component 20 are located is a discharge circuit, and the discharge circuit is electrically connected to both ends of C2. In the initial state, IGBT1 and the boost module 11 are both in the disconnected state.

[0104] Phase 1: Energy storage phase, energy storage capacitor stores energy. The control module 12 controls the boost module 11 to turn on, and through the energy storage circuit, the boost module 11 charges the energy storage capacitor C1, and the voltage across the energy storage capacitor C1 continues to increase to achieve energy storage of the energy storage capacitor C1. Since IGBT1 is in the disconnected state, the voltage across the charging circuit and the discharge circuit are equal to the voltage across the energy storage capacitor C1 and there is no current.

[0105] The second stage: charging stage, the energy relay capacitor and the shock wave electrode are charged. When the voltage across the energy storage capacitor C1 reaches the set value, the voltage across the charging circuit and the discharge circuit also reaches the set value; the control module 12 controls the boost module 11 to disconnect, and the boost module 11 stops charging the energy storage capacitor C1; at the same time, the control module 12 controls the IGBT1 to turn on, and current is formed in the charging circuit and the discharge circuit, and the energy storage capacitor C1 starts to charge the energy relay capacitor C2 and the shock wave electrode 31.

[0106] The third stage: the release stage, the shock wave electrode pre-breaks down and releases the shock wave. The energy storage capacitor C1 continues to charge the energy relay capacitor C2 and the shock wave electrode 31. The voltage at both ends of the shock wave electrode 31 continues to rise until the voltage at both ends of the shock wave electrode 31 is close to its breakdown voltage. The shock wave electrode 31 enters the pre-breakdown state. At this time, the shock wave electrode 31 begins to ablate and consumes electrical energy; until the voltage at both ends of the shock wave electrode 31 reaches its breakdown voltage, the shock wave electrode 31 discharges and breaks down to release the shock wave. The shock wave electrode 31 is equivalent to an inductor. The energy storage capacitor C1 continues to discharge to the shock wave electrode 31 through the arrow direction of the outer circle shown in the figure. At the same time, the energy relay capacitor C2 stops charging and starts to discharge to the shock wave electrode 31 through the arrow direction of the inner circle shown in the figure. A pulse current with a higher peak value is instantly formed on the discharge circuit, so that the shock wave electrode 31 releases a shock wave carrying a large mechanical energy and a large amount of heat. At the same time, the voltage in the charging circuit and the discharge circuit drops rapidly, IGBT1 is disconnected, and the entire shock wave system returns to the initial state.

[0107] In the pre-breakdown stage, the more electric energy the energy relay capacitor C2 divides from the energy storage capacitor C1, that is, the greater the current flowing through the energy relay capacitor C2, the less electric energy the shock wave electrode 31 divides from the energy storage capacitor C1, that is, the smaller the current flowing through the shock wave electrode 31, the less electrode ablation and electric energy consumption of the shock wave electrode 31, and the longer the service life of the shock wave electrode 31. Figure 3 , Fig.10 , Fig.15 , Fig. 20 , Fig.25In the different embodiments shown, in the shock wave release stage, C1 is discharged through the loop formed by C1, the connecting component 20, the shock wave electrode 31 and the IGBT, and C2 is discharged through the loop formed by C2, the connecting component 20 and the shock wave electrode 31, and there is no IGBT impedance in the discharge loop of C2. The shock wave energy depends on the electric energy released by C1 and C2 to the shock wave electrode 31, and no longer depends on the electric energy accumulated on the shock wave electrode 31. Therefore, the shock wave system of the present application can release shock waves carrying greater mechanical energy, thereby having a stronger therapeutic effect.

[0108] In addition, the positive electrode of the shock wave electrode 31 and the negative electrode of the shock wave electrode 31 are connected to the boost module 11, and the shock wave electrode 31 enters the pre-breakdown stage. Electrons accumulate at the negative electrode of the shock wave electrode 31 until the electrons accumulated at the negative electrode of the shock wave electrode 31 make the potential of the positive electrode of the shock wave electrode 31 close to the critical value of the discharge breakdown. Electrons continue to accumulate at the negative electrode of the shock wave electrode 31, and the potential of the positive electrode of the shock wave electrode 31 reaches the critical value of the discharge breakdown, and the shock wave electrode 31 enters the discharge breakdown stage. During the discharge breakdown process, electrons move from the negative electrode of the shock wave electrode 31 to the positive electrode of the shock wave electrode 31 to generate an arc. In order to increase the shock wave energy released by the shock wave formed by the discharge breakdown of the shock wave electrode 31, the structure of the shock wave electrode 31 is usually that the exposed area of ​​the negative electrode is larger than the exposed area of ​​the positive electrode, so that electrons accumulate at the negative electrode of the shock wave electrode 31. On the contrary, if the structure of the shock wave electrode 31 is such that the exposed area of ​​the positive electrode is larger than the exposed area of ​​the negative electrode, it is not conducive to the accumulation of electrons at the negative electrode of the shock wave electrode 31, and a high-energy shock wave cannot be generated during discharge. Since the energy relay capacitor C2 is introduced, the accumulation of electrons is achieved by the energy relay capacitor C2, and the accumulation effect of electrons on the shock wave electrode 31 is much smaller than that of the energy relay capacitor C2, thereby weakening the influence of the polarity of the shock wave electrode 31.

[0109] The present invention has at least the following beneficial effects:

[0110] 1) reducing the current flowing through the shock wave electrode 31 in the pre-breakdown stage, thereby reducing the energy consumption and electrode ablation in the pre-breakdown stage and extending the service life of the shock wave electrode 31;

[0111] 2) Increasing the energy released by the shock wave electrode 31 during the shock wave release phase, thereby significantly increasing the mechanical energy carried by the shock wave and improving the therapeutic effect of the shock wave;

[0112] 3) The mechanical energy carried by the shock wave depends on the electrical energy released to the shock wave electrode 31 by the energy storage capacitor C1 and the energy relay capacitor C2, and no longer depends on the electrical energy accumulated on the shock wave electrode 31, so that the mechanical energy carried by the shock wave is no longer limited by the structural design of the shock wave electrode 31, and at the same time, the influence of the polarity of the shock wave electrode 31 on the mechanical energy carried by the shock wave is weakened;

[0113] 4) Reduce the influence of parasitic impedance on pulse current when releasing shock wave. The closer the distance between energy relay capacitor C2 and shock wave electrode 31 is, the smaller the influence of parasitic impedance is.

[0114] 5) The energy relay capacitor C2 can absorb the high-frequency signal components generated by the boost module 11 due to the on and off of the switch-type electronic components, greatly reducing the high-frequency noise radiated outward, and has the technical effect of reducing high-frequency noise and electromagnetic interference.

[0115] The above is only a specific embodiment of the present invention, and cannot be used to limit the scope of the invention. Therefore, the replacement of equivalent components, or equivalent changes and modifications made according to the scope of protection of the patent of the present invention, should still fall within the scope of this patent. In addition, the technical features of the present invention can be freely combined with each other, with each other, and with each other.

Claims

1. A shock wave generating method, characterized in that: The following steps are involved: The boost module charges the energy storage capacitor; When the voltage of the energy storage capacitor reaches the set value, the boost module stops charging the energy storage capacitor, and the energy storage capacitor charges the energy relay capacitor and the shock wave electrode; When the voltage across the shock wave electrode reaches the breakdown voltage of the shock wave electrode, the energy relay capacitor stops charging and discharges to the shock wave electrode, and the energy storage capacitor continues to discharge to the shock wave electrode, and the shock wave electrode discharges, breaks down and releases the shock wave.

2. The shock wave generating method according to claim 1, characterized in that: Further comprising the steps of: When the voltage of the energy relay capacitor reaches at least the breakdown voltage of the shock wave electrode, the voltage across the shock wave electrode reaches the breakdown voltage of the shock wave electrode; or, When the voltage of the energy relay capacitor reaches at least the sum of the breakdown voltage of the shock wave electrode and the breakdown voltage of the voltage-limiting protection component, the voltage across the shock wave electrode reaches the breakdown voltage of the shock wave electrode.

3. A shock wave system for implementing the shock wave generating method according to any one of claims 1 to 2, characterized in that: It includes a high-voltage pulse power supply, a shock wave guide tube and an energy relay capacitor; the high-voltage pulse power supply includes a power module and switch-type electronic components, the power module includes a boost module and an energy storage capacitor electrically connected to each other; the shock wave guide tube includes a shock wave electrode, and the power module, the shock wave electrode and the switch-type electronic components are electrically connected; one end of the energy relay capacitor is electrically connected to one end of the shock wave electrode, and the other end of the energy relay capacitor is electrically connected to the other end of the shock wave electrode.

4. The shock wave system according to claim 3, characterized in that The capacitance value of the energy relay capacitor is greater than or equal to the equivalent capacitance value of the shock wave electrode and less than the capacitance value of the energy storage capacitor.

5. The shock wave system according to claim 4, characterized in that The capacitance value of the energy relay capacitor is an optimal value. When the capacitance value of the energy relay capacitor is an optimal value, the shock wave released by the discharge breakdown of the shock wave electrode has a maximum intensity.

6. The shock wave system according to claim 3, characterized in that: The high-voltage pulse power supply further includes a rectifier diode electrically connected between the boost module and the energy storage capacitor; and / or, The high-voltage pulse power supply further includes a current-limiting resistor electrically connected to the switch-type electrical component; and / or, The switch type electronic component is IGBT, GDT, SCR or MOSFET.

7. The shock wave system according to claim 3, characterized in that The shock wave system also includes a connecting component, through which the shock wave guide tube is electrically connected to the high-voltage pulse power supply; as well as, The energy relay capacitor is arranged in the high-voltage pulse power supply and is electrically connected to the power supply module and the switch-type components, and the energy relay capacitor is electrically connected to the shock wave electrode through a connecting component; or, The energy relay capacitor is arranged on the connection assembly; the energy relay capacitor is electrically connected to the power module and the switch type components through the connection assembly, and the energy relay capacitor is electrically connected to the shock wave electrode through the connection assembly; or, The energy relay capacitor is arranged on the shock wave guide tube; the energy relay capacitor and the shock wave electrode which are electrically connected to each other are electrically connected to the power supply module and the switch type components through the connecting assembly.

8. The shock wave system according to claim 7, characterized in that The connecting component is a connecting cable.

9. The shock wave system according to any one of claims 3 to 8, characterized in that The shock wave system also includes a voltage-limiting protection component, which is electrically connected to the energy relay capacitor and the shock wave electrode; wherein the voltage-limiting protection component is in a disconnected state when the voltage at both ends does not reach the breakdown voltage, and is in a conducting state when the voltage at both ends reaches the breakdown voltage.

10. The shock wave system according to claim 9, characterized in that The voltage-limiting protection component is a gas discharge tube or a varistor.

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