Shock Wave Power Supply and Shock Wave Release Detection Method

Abstract

The present invention provides a shock wave power supply and a shock wave release detection method. The shock wave power supply includes a boost circuit, at least one detection circuit, and at least one discharge circuit; the boost circuit is connected to all the discharge circuits in the same single circuit, at least one detection circuit is connected to at least one discharge circuit in one-to-one correspondence, and one end of the detection circuit is electrically connected to one end of its corresponding discharge circuit, and the other end of the detection circuit is electrically connected to the other end of its corresponding discharge circuit. The present invention realizes the detection of both the short circuit and the open circuit of the discharge circuit by detecting the voltage drop of the discharge circuit, so as to cover two circuit fault states and achieve the purpose of completely detecting the circuit fault state.

Description

Technical Field

[0001] The present invention relates to the technical field of shock wave power supplies, and particularly to a shock wave power supply and a shock wave release detection method. Background Art

[0002] In the electrohydraulic shock wave technology applied in the medical field, it is usually determined whether the shock wave catheter treats the treatment site by judging whether the shock wave electrode releases a shock wave with a therapeutic effect. The currently commonly used method is to use a current sensor to detect the current in the circuit where the shock wave electrode is located, and confirm that the shock wave electrode discharges and breaks down to generate an arc and releases a shock wave with a therapeutic effect by judging that the detected current is greater than the threshold current. For example, as Figure 1 shown, a current transformer is connected in series in the circuit where the shock wave electrode is located, or, as Figure 2 shown, a non-contact current transformer can also be used. The currently adopted method can effectively detect the failure that the shock wave electrode cannot discharge and break down when the circuit where the shock wave electrode is located is open. Summary of the Invention

[0003] In view of this, the present invention provides a shock wave power supply and a shock wave release detection method, so as to achieve that whether the shock wave electrode cannot release a shock wave with a therapeutic effect due to an open circuit or a short circuit in the circuit where the shock wave electrode is located can be detected, so as to accurately judge whether the shock wave electrode releases a shock wave with a therapeutic effect.

[0004] The present invention provides the following technical solutions: A shock wave power supply includes a boosting circuit, at least one detection circuit, and at least one discharge circuit; the boosting circuit and all discharge circuits are connected to the same single circuit, at least one detection circuit is connected to at least one discharge circuit in one-to-one correspondence, and one end of the detection circuit is electrically connected to one end of its corresponding discharge circuit, and the other end of the detection circuit is electrically connected to the other end of its corresponding discharge circuit.

[0005] Further, the detection circuit includes: a current adjustment resistor, one end of which is electrically connected to one end of the corresponding discharge circuit; an optocoupler, one end of the input side of which is electrically connected to the other end of the current adjustment resistor, and the other end of the input side of the optocoupler is electrically connected to the other end of the discharge circuit, and the optocoupler can detect the voltage drop of the discharge circuit.

[0006] Further, the boosting circuit includes a high-voltage power supply, a first capacitor, and a first rectifier diode. One end of the high-voltage power supply is electrically connected to one end of the first capacitor, the other end of the high-voltage power supply is electrically connected to the other end of the first capacitor, and the first rectifier diode is electrically connected between one end of the high-voltage power supply and one end of the first capacitor.

[0007] Further, the boosting circuit further includes a control module for controlling the on and off of the high-voltage power supply.

[0008] Further, the discharge circuit includes at least one shock wave electrode, and the corresponding detection circuit is connected to all the shock wave electrodes in the same single circuit.

[0009] Further, the discharge circuit includes at least one second capacitor, and at least one second capacitor is electrically connected to at least one shock wave electrode in one-to-one correspondence. One end of the second capacitor is electrically connected to one end of its corresponding shock wave electrode, and the other end of the second capacitor is electrically connected to the other end of its corresponding shock wave electrode.

[0010] Further, the shock wave power supply further includes a current limiting resistor and a switching component. One end of the current limiting resistor is electrically connected to the other end of the discharge circuit, one end of the switching component is electrically connected to the other end of the current limiting resistor, and the other end of the switching component is connected to the ground wire.

[0011] Further, the shock wave power supply further includes a control chip, which is electrically connected to the switching component and the detection circuit.

[0012] The present invention also provides a shock wave release detection method, which is carried out by using the above-mentioned shock wave power supply.

[0013] Further, the shock wave release detection method includes: when the switching component is turned off, the light emitting diode in the optocoupler does not emit light, the first field effect transistor in the optocoupler is turned on and the second field effect transistor is turned off, and at this time the output voltage Vout of the optocoupler is at a high level; when the switching component is turned on, the light emitting diode in the optocoupler emits light, the first field effect transistor in the optocoupler is turned off and the second field effect transistor is turned on, and at this time the output voltage Vout of the voltage detection circuit is at a low level; when the shock wave electrode discharges, the voltage across the shock wave electrode drops instantaneously to 0V, at this time the light emitting diode in the optocoupler does not emit light, the first field effect transistor in the optocoupler is turned on and the second field effect transistor is turned off, and at this time the output voltage Vout of the optocoupler is at a high level, thus forming a voltage rising edge; when the shock wave electrode is short-circuited, the light emitting diode in the optocoupler does not emit light, the first field effect transistor in the optocoupler is turned on and the second field effect transistor is turned off, and at this time the output voltage Vout in the optocoupler is at a high level; when the discharge circuit is open, the light emitting diode in the optocoupler emits light, the first field effect transistor in the optocoupler is turned off and the second field effect transistor is turned on, and at this time the output voltage Vout of the optocoupler is at a low level.

[0014] Compared with the prior art, the beneficial effects that can be achieved by at least one of the above technical solutions adopted in the present invention at least include: By using a detection circuit to detect whether the voltage of the discharge circuit (i.e., the circuit where the shock wave electrode is located) drops, it can accurately determine whether the shock wave electrode in the discharge circuit releases shock waves with therapeutic effects, achieving the purpose of accurately knowing whether the shock wave electrode releases shock waves with therapeutic effects. This is because regardless of whether the discharge circuit is open or short-circuited, the voltage of the discharge circuit where the shock wave electrode is located will not drop; in addition, when a fault occurs in the discharge circuit and the shock wave electrode cannot release shock waves with therapeutic effects, the present invention can further determine whether the circuit where the shock wave electrode is located is open or short-circuited by detecting whether the output voltage in the detection circuit is high or low, so as to realize the detection of both the open circuit and the short circuit of the discharge circuit, covering the two fault states of the discharge circuit and achieving the purpose of completely detecting the state of the discharge circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] 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 those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0016] Figure 1 is a schematic diagram of the first prior art solution;

[0017] Figure 2 is a schematic diagram of the second prior art solution;

[0018] Figure 3 is a schematic diagram of one embodiment of the present invention;

[0019] Figure 4 is a schematic diagram of another embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The embodiments of the present application will be described in detail below with reference to the drawings.

[0021] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the drawings and in combination with the embodiments.

[0022] The basic principle of electrohydraulic shock wave generation is to apply a high voltage (potential difference) to the shock wave electrode in a liquid medium with a certain conductivity (conductive liquid), and generate an instantaneous discharge with a large current within a few microseconds. During the discharge process, a high-temperature and high-pressure plasma region with a high energy density is formed on the discharge channel, causing the discharge channel to expand rapidly and forming a pressure pulse, that is, a shock wave, in the liquid medium. In addition to generating shock waves during the discharge process, a part of the electrical energy is also converted into heat and light.

[0023] During the actual working process, the fault states in which the shock wave electrode cannot discharge and break down caused by the circuit where the shock wave electrode is located include two types: open circuit and short circuit. When the circuit where the shock wave electrode is located is short-circuited, a relatively large current will still be formed in the circuit where the shock wave electrode is located, which is similar to the current magnitude in the circuit where the shock wave electrode is located when the shock wave electrode discharges and breaks down. Therefore, in the prior art, by whether the current in the circuit where the shock wave electrode is located is greater than the threshold current, the situation where the shock wave electrode cannot release a shock wave with a therapeutic effect when the circuit where the shock wave electrode is located is open circuit can be detected, but the situation where the shock wave electrode cannot release a shock wave with a therapeutic effect when the circuit where the shock wave electrode is located is short-circuited cannot be detected, so it is impossible to accurately know whether the shock wave electrode releases a shock wave with a therapeutic effect.

[0024] In this application, the inventor proposes that it is possible to judge whether the shock wave electrode releases a shock wave with a therapeutic effect according to whether there is a voltage drop rising edge in the circuit where the shock wave electrode is located (i.e., the discharge circuit).

[0025] When the shock wave electrode releases a shock wave, due to the rapid release of energy, the voltage across the shock wave electrode will drop instantaneously. If the circuit where the shock wave electrode is located is open circuit, the shock wave electrode will not be able to discharge and break down and release a shock wave, then the voltage across the shock wave electrode will not drop instantaneously. If the circuit where the shock wave electrode is located is short-circuited, the circuit where the shock wave electrode is located cannot apply a high-voltage electrical signal to the two terminals of the shock wave electrode, and the shock wave electrode cannot discharge and break down and release a shock wave either, and the voltage across the shock wave electrode will not drop instantaneously even more. Based on this, the embodiments of the present invention propose to judge whether the shock wave electrode releases a shock wave with a therapeutic effect by detecting whether there is a rising edge in the voltage across the shock wave electrode, and whether the circuit where the shock wave electrode is located is open circuit or short circuit can be detected.

[0026] Such as Figure 3 and Figure 4As shown in the figure, an embodiment of the present invention provides a shock wave power supply, including a boost circuit, at least one detection circuit, and at least one discharge circuit; the boost circuit and all discharge circuits are connected to the same single circuit, at least one detection circuit is connected to at least one discharge circuit in a one-to-one correspondence, and one end of the detection circuit is electrically connected to one end of its corresponding discharge circuit, and the other end of the detection circuit is electrically connected to the other end of its corresponding discharge circuit.

[0027] The present invention determines whether a shock wave electrode in the discharge circuit releases a shock wave with a therapeutic effect by detecting whether the voltage of the discharge circuit drops through the detection circuit, so as to realize the detection of the situation where the shock wave electrode in the discharge circuit cannot release a shock wave with a therapeutic effect due to an open circuit in the discharge circuit, and can also detect the situation where the shock wave electrode in the discharge circuit cannot release a shock wave with a therapeutic effect due to a short circuit in the discharge circuit, achieving the purpose of accurately judging whether the shock wave electrode releases a shock wave with a therapeutic effect.

[0028] Specifically, the detection circuit includes:

[0029] A current adjustment resistor R1, one end of which is electrically connected to one end of the corresponding discharge circuit;

[0030] An optocoupler, one end of the input side of which is electrically connected to the other end of the current adjustment resistor R1, the other end of the input side of the optocoupler is electrically connected to the other end of the discharge circuit, and the optocoupler can detect the voltage drop of the discharge circuit.

[0031] The present invention realizes the accurate monitoring of whether the shock wave electrode successfully releases a shock wave with a therapeutic effect. Specifically, the combination of the current adjustment resistor R1 and the optocoupler in the detection circuit enables the system to identify whether the shock wave electrode discharges normally by monitoring whether the voltage in the circuit drops.

[0032] In addition, this technical solution can also detect the short circuit and open circuit faults of the shock wave electrode at the same time. Through the voltage change output by the optocoupler, the system can identify whether the electrode fails to discharge normally due to a short circuit or an open circuit, which is crucial for the safe operation and therapeutic effect of medical equipment. This fault detection ability ensures the safety and effectiveness during the medical process and avoids the risks to patients caused by equipment failures.

[0033] It should be noted that by selecting current adjustment resistors R1 with different resistance values, the sensitivity of the detection circuit can be adjusted. When higher sensitivity is required, a current adjustment resistor R1 with a smaller resistance value can be selected. Of course, the resistance value of the current adjustment resistor R1 cannot be too small, as this will cause it to consume a large amount of energy, thereby reducing the energy carried by the shock wave released by the shock wave electrode (including light energy and mechanical energy). When actually selecting, the resistance value of the current adjustment resistor R1 can be selected according to the minimum drive current and rated current of the optocoupler. On the premise of being able to meet the optocoupler drive, the larger the resistance value of the current adjustment resistor R1, the smaller the energy consumed by the current adjustment resistor R1, and the greater the energy carried by the shock wave released by the shock wave electrode. In addition, because the width of the high-voltage pulse is 1 μs - 2 μs when the shock wave electrode discharges, a fast optocoupler is preferably used, and generally an optocoupler in the nanosecond level can meet the usage requirements.

[0034] The boost circuit includes a high-voltage power supply, a first capacitor C1, and a first rectifier diode D1. One end of the high-voltage power supply is electrically connected to one end of the first capacitor C1, the other end of the high-voltage power supply is electrically connected to the other end of the first capacitor C1, and the first rectifier diode D1 is disposed between one end of the high-voltage power supply and one end of the first capacitor C1.

[0035] In a feasible implementation, the boost circuit can achieve efficient voltage conversion and energy storage. The connection mode of the high-voltage power supply and the first capacitor C1 enables the circuit to accumulate a large amount of electrical energy in a short time, while the use of the first rectifier diode D1 ensures the unidirectional flow of current. This design helps to quickly release high voltage when needed, meeting the demand for instant high voltage of specific devices.

[0036] Preferably, the boost circuit further includes a control module for controlling the on and off of the high-voltage power supply.

[0037] Through the control module, the state of the high-voltage power supply can be precisely managed to achieve remote or automatic control of the on and off of the high-voltage power supply. Secondly, the addition of the control module also enhances the reliability and stability of the circuit. When a fault is detected, the control module can quickly cut off the high-voltage power supply to prevent the fault from further expanding and protect the circuit from damage. In addition, by adjusting the output voltage of the high-voltage power supply through the control module, the output voltage can be more precisely controlled to meet the requirements of different loads, improving the efficiency and performance of the entire system.

[0038] The discharge circuit includes at least one shock wave electrode, and the corresponding detection circuit is connected to all shock wave electrodes in the same single circuit. As Figure 3 shown, in the embodiment of the present invention, there is one shock wave electrode, and the high-voltage power supply can provide energy for the shock wave electrode, thereby realizing the breakdown of the shock wave electrode to generate arc discharge.

[0039] Preferably, as Figure 4 shown, the discharge circuit includes at least one second capacitor C2. At least one second capacitor C2 is electrically connected to at least one shock wave electrode in a one-to-one correspondence. One end of the second capacitor C2 is electrically connected to one end of its corresponding shock wave electrode, and the other end of the second capacitor C2 is electrically connected to the other end of its corresponding shock wave electrode.

[0040] After the introduction of the second capacitor C2, the current in the pre-breakdown stage mainly flows through the second capacitor C2, and the energy is stored in the second capacitor C2. When the shock wave electrode breaks down, this part of the energy in the second capacitor C2 is released to the shock wave electrode, thereby improving the energy release efficiency and reducing the ablation of the shock wave electrode.

[0041] The second capacitor C2 serves as an energy node, enabling the high-voltage power supply to charge the second capacitor C2 and the shock wave electrode first, and then the second capacitor C2 discharges to the shock wave electrode. Through the energy storage function of the second capacitor C2, a pulsed current with a high amplitude and a long pulse width is achieved in the circuit where the second capacitor C2 discharges to the shock wave electrode, enabling the shock wave electrode to release a shock wave with a relatively high energy; at the same time, during the pre-breakdown stage of the shock wave electrode, through the shunt effect of the second capacitor C2, the loss caused by melting and ablation of the shock wave electrode can be effectively reduced, effectively extending the service life of the shock wave electrode, enabling the shock wave electrode to release a sufficient number of shock waves, and achieving a better therapeutic effect.

[0042] The mechanical energy carried by the shock wave depends on the electrical energy released by the second capacitor C2 to the shock wave electrode, and no longer depends on the electrical energy accumulated on the shock wave electrode, so that the mechanical energy carried by the shock wave is no longer limited by the structural design of the shock wave electrode. At the same time, the influence of the polarity of the shock wave electrode on the mechanical energy carried by the shock wave is also weakened.

[0043] When the voltage across the two ends of the shock wave electrode reaches the breakdown voltage of the shock wave electrode, the shock wave electrode enters the pre-breakdown stage. At this time, the shock wave electrode begins to melt and ablate. Due to the shunt of the second capacitor C2, the current flowing through the shock wave electrode is effectively reduced. Therefore, the electrical energy consumed by the shock wave electrode in the pre-breakdown stage is reduced, and the heat energy converted from the consumed electrical energy on the shock wave electrode also decreases accordingly. Since the loss caused by the heat energy leading to the melting and ablation of the shock wave electrode also decreases, the service life of the shock wave electrode is extended.

[0044] The second capacitor C2 can absorb the high-frequency signal components generated by the high-voltage power supply due to the on and off of the switch-type electronic components, greatly reducing the high-frequency noise radiated outward, and having the technical effects of reducing high-frequency noise and reducing electromagnetic interference.

[0045] The shock wave power supply further includes a switching component Q1 for controlling whether the shock wave electrode discharges and a current-limiting resistor R2 for protecting the switching component Q1. One end of the current-limiting resistor R2 is electrically connected to the other end of the discharge circuit. One end of the switching component Q1 is electrically connected to the other end of the current-limiting resistor R2, and the other end of the switching component Q1 is connected to the ground wire.

[0046] Preferably, the shock wave power supply further includes a control chip (Processor), which is electrically connected to the switching component Q1 and the detection circuit.

[0047] First of all, this design makes the control of the power supply system more intelligent and precise. The control chip can monitor and adjust the state of the switching component Q1 and the working condition of the detection circuit in real time, so as to achieve fine control of the shock wave power supply. This intelligent management not only improves the response speed and control accuracy of the power supply system, but also helps to enhance the stability and reliability of the power supply system.

[0048] Secondly, through the electrical connection between the control chip and the detection circuit, the real-time monitoring and fault diagnosis of the working state of the shock wave power supply can be effectively realized. The control chip can receive signals from the detection circuit, analyze the working state of the shock wave power supply, and timely discover and handle possible problems. This real-time monitoring and response mechanism improves the reliability and stability of the power supply system, reduces the maintenance cost, and also provides important data support for the maintenance and performance optimization of the power supply.

[0049] The present invention also provides a shock wave release detection method, which is carried out by using the above shock wave power supply. The shock wave release detection method includes:

[0050] When the switching component Q1 is turned off, the light-emitting diode in the optocoupler does not emit light. The first field-effect transistor in the optocoupler is turned on and the second field-effect transistor is turned off. At this time, the output voltage Vout of the optocoupler is at a high level;

[0051] When the switching component Q1 is turned on, the light-emitting diode in the optocoupler emits light. The first field-effect transistor in the optocoupler is turned off and the second field-effect transistor is turned on. At this time, the output voltage Vout of the voltage detection circuit is at a low level; when the shock wave electrode discharges, the voltage across the shock wave electrode drops instantaneously to 0V. At this time, the light-emitting diode in the optocoupler does not emit light. The first field-effect transistor in the optocoupler is turned on and the second field-effect transistor is turned off. At this time, the output voltage Vout of the optocoupler is at a high level, thus forming a voltage rising edge;

[0052] When the circuit where the shock wave electrode is located is short-circuited, the light-emitting diode in the optocoupler does not emit light. The first field-effect transistor in the optocoupler is turned on and the second field-effect transistor is turned off. At this time, the output voltage Vout in the optocoupler is at a high level;

[0053] When the circuit where the shock wave electrode is located is open, the light-emitting diode in the optocoupler emits light, the first field-effect transistor in the optocoupler is cut off and the second field-effect transistor is turned on. At this time, the output voltage Vout of the optocoupler is at a low level.

[0054] The present invention can detect both the open circuit and the short circuit of the electrode, can cover two fault states of the circuit where the shock wave electrode is located, and achieves the purpose of completely detecting the state of the circuit where the shock wave electrode is located.

[0055] As described above, only the specific embodiments of the present invention are provided, and the scope of the invention implementation cannot be limited by them. Therefore, the replacement of equivalent components, or equivalent changes and modifications made according to the scope of the present invention patent protection, should still fall within the scope covered by this patent. In addition, the technical features in the present invention, between technical features, between technical features and technical solutions, and between technical solutions can be freely combined and used.

Claims

1. A shock wave power supply, characterized in that, It includes a boost circuit, at least one detection circuit and at least one discharge circuit; the boost circuit is connected to all the discharge circuits in the same single circuit, at least one of the detection circuits is connected to at least one discharge circuit in one-to-one correspondence, and one end of the detection circuit is electrically connected to one end of its corresponding discharge circuit, and the other end of the detection circuit is electrically connected to the other end of its corresponding discharge circuit; The detection circuit includes: a current adjustment resistor, one end of which is electrically connected to one end of the corresponding discharge circuit; An optocoupler, one end of the input side of which is electrically connected to the other end of the current adjustment resistor, the other end of the input side of the optocoupler is electrically connected to the other end of the discharge circuit, and the optocoupler can detect the voltage drop of the discharge circuit; The discharge circuit includes at least one shock wave electrode, and the corresponding detection circuit is connected to all the shock wave electrodes in the same single circuit.

2. The shock wave power supply according to claim 1, characterized in that, The boost circuit includes a high-voltage power supply, a first capacitor and a first rectifier diode. One end of the high-voltage power supply is electrically connected to one end of the first capacitor, the other end of the high-voltage power supply is electrically connected to the other end of the first capacitor, and the first rectifier diode is electrically connected between one end of the high-voltage power supply and one end of the first capacitor.

3. The shock wave power supply according to claim 2, wherein, The boost circuit further includes a control module for controlling the on and off of the high-voltage power supply.

4. The shock wave power supply according to claim 1, characterized in that The discharge circuit includes at least one second capacitor, and at least one of the second capacitors is electrically connected to at least one of the shock wave electrodes in one-to-one correspondence. One end of the second capacitor is electrically connected to one end of its corresponding shock wave electrode, and the other end of the second capacitor is electrically connected to the other end of its corresponding shock wave electrode.

5. The shock wave power supply according to claim 1, characterized in that, The shock wave power supply further includes a current-limiting resistor and a switching component. One end of the current-limiting resistor is electrically connected to the other end of the discharge circuit, one end of the switching component is electrically connected to the other end of the current-limiting resistor, and the other end of the switching component is connected to the ground wire.

6. The shock wave power supply according to claim 5, characterized in that The shock wave power supply further includes a control chip, which is electrically connected to the switching component and the detection circuit.

7. A shock wave release detection method, which is carried out by using the shock wave power supply as described above, is characterized in that, The shock wave power supply is the shock wave power supply according to any one of claims 1 to 6.

8. The shock wave release detection method according to claim 7, wherein It includes: When the switching component is turned off, the light-emitting diode in the optocoupler does not emit light, the first field-effect transistor in the optocoupler is turned on and the second field-effect transistor is turned off. At this time, the output voltage Vout of the optocoupler is at a high level; When the switching component is turned on, the light-emitting diode in the optocoupler emits light, the first field-effect transistor in the optocoupler is turned off and the second field-effect transistor is turned on. At this time, the output voltage Vout of the detection circuit is at a low level; when the shock wave electrode discharges, the voltage across the shock wave electrode drops to 0V instantaneously. At this time, the light-emitting diode in the optocoupler does not emit light, the first field-effect transistor in the optocoupler is turned on and the second field-effect transistor is turned off. At this time, the output voltage Vout of the optocoupler is at a high level, thus forming a voltage rising edge; When the shock wave electrode is short-circuited, the light-emitting diode in the optocoupler does not emit light, the first field-effect transistor in the optocoupler is turned on and the second field-effect transistor is turned off. At this time, the output voltage Vout in the optocoupler is at a high level; When the shock wave electrode is open-circuited, the light-emitting diode in the optocoupler emits light, the first field-effect transistor in the optocoupler is cut off and the second field-effect transistor is turned on, and at this time the output voltage Vout of the optocoupler is at a low level.

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