Shock wave power supply and shock wave release detection method

Abstract

Provided in the present application are a shock wave power supply and a shock wave release detection method. The shock wave power supply comprises a boost circuit, at least one detection circuit and at least one discharge circuit, wherein the boost circuit and all the discharge circuits are connected to the same single circuit, the at least one detection circuit and the at least one discharge circuit are connected in one-to-one correspondence, one end of each detection circuit is electrically connected to one end of a discharge circuit corresponding thereto, and the other end of the detection circuit is electrically connected to the other end of the discharge circuit corresponding thereto. In the present application, detecting a voltage drop of a discharge circuit enables detection of both a short-circuit fault in the discharge circuit and an open-circuit fault in the discharge circuit, thereby covering two circuit fault states, and thus achieving the aim of complete circuit fault state detection.

Description

Shock wave power supply and shock wave release detection method

[0001] Related applications

[0002] This disclosure claims priority to Chinese Patent Application No. CN202411740992.1, filed on November 29, 2024, entitled "Shock Wave Power Supply and Shock Wave Release Detection Method", the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of shock wave power supply technology, specifically to a shock wave power supply and a shock wave release detection method. Background Technology

[0004] In electrohydraulic shockwave therapy applied in the medical field, the effectiveness of the shockwave catheter in treating the target area is typically determined by whether the shockwave electrode releases a therapeutic shockwave. Currently, a common method involves using a current sensor to detect the current in the circuit containing the shockwave electrode. If the detected current exceeds a threshold current, it confirms that the shockwave electrode has discharged, broken down, and generated an arc, releasing the therapeutic shockwave. For example, as shown in Figure 1, a current transformer is connected in series in the circuit containing the shockwave electrode; alternatively, as shown in Figure 2, a non-contact current transformer can be used. This current method can effectively detect faults where the shockwave electrode fails to discharge and break down when the circuit containing the shockwave electrode is open. Summary of the Invention

[0005] In view of this, this application provides a shock wave power supply and a shock wave release detection method, so that the shock wave electrode can be detected regardless of whether the circuit where the shock wave electrode is located is open or short-circuited, causing the shock wave electrode to be unable to release a shock wave with therapeutic effect, thereby accurately determining whether the shock wave electrode releases a shock wave with therapeutic effect.

[0006] This application provides the following technical solution: 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, the at least one detection circuit is connected to the 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.

[0007] Furthermore, the detection circuit includes: a current adjustment resistor, one end of which is electrically connected to one end of the corresponding discharge circuit; and an optocoupler, one end of which is electrically connected to the other end of the current adjustment resistor, and the other end of which is electrically connected to the other end of the discharge circuit. The optocoupler is capable of detecting voltage drops in the discharge circuit.

[0008] Furthermore, 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, and the other end of the high-voltage power supply is electrically connected to the other end of the first capacitor. The first rectifier diode is electrically connected between one end of the high-voltage power supply and one end of the first capacitor.

[0009] Furthermore, the boost circuit also includes a control module for controlling the switching on and off of the high-voltage power supply.

[0010] Furthermore, 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.

[0011] Furthermore, the discharge circuit includes at least one second capacitor, which is electrically connected to at least one shock wave electrode in a 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.

[0012] Furthermore, the shock wave power supply also 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.

[0013] Furthermore, the shock wave power supply also includes a control chip, which is electrically connected to switching components and detection circuits.

[0014] This application also provides a shock wave release detection method, which uses the aforementioned shock wave power supply.

[0015] Furthermore, the shock wave release detection method includes: when the switching component is turned off, the LED 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 which time the output voltage Vout of the optocoupler is high; when the switching component is turned on, the LED 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 which time the output voltage Vout of the voltage detection circuit is low; when the shock wave electrode discharges, the voltage across the shock wave electrode drops instantaneously to 0V, at which time the LED 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 which time the output voltage Vout of the optocoupler is high, thus forming a voltage rising edge; when the shock wave electrode is short-circuited, the LED 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 which time the output voltage Vout of the optocoupler is high; when the discharge circuit is open, the LED 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 which time the output voltage Vout of the optocoupler is low.

[0016] Compared with the prior art, the beneficial effects that the above-mentioned at least one technical solution adopted in this application can achieve include at least the following: This application uses a detection circuit to detect whether the voltage of the discharge circuit (i.e., the circuit where the shock wave electrode is located) drops, and can accurately determine whether the shock wave electrode in the discharge circuit releases a shock wave with therapeutic effect, thereby achieving the purpose of accurately knowing whether the shock wave electrode releases a shock wave with therapeutic effect. This is based on the fact that the discharge circuit where the shock wave electrode is located will not experience a voltage drop regardless of whether the discharge circuit is open-circuited or short-circuited. In addition, when the discharge circuit malfunctions and causes the shock wave electrode to be unable to release a shock wave with therapeutic effect, this application can further determine whether the circuit where the shock wave electrode is located is open-circuited or short-circuited by detecting whether the output voltage in the detection circuit is high-level or low-level. This achieves the goal of detecting both open-circuit and short-circuit discharge circuits, covering both fault states of the discharge circuit, and achieving the purpose of completely detecting the state of the discharge circuit. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 is a schematic diagram of the first prior art solution;

[0019] Figure 2 is a schematic diagram of the second existing technical solution;

[0020] Figure 3 is a schematic diagram of one embodiment of this application;

[0021] Figure 4 is a schematic diagram of another embodiment of this application. Detailed Implementation

[0022] The embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0023] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0024] The basic principle of electrohydraulic shock wave generation is to apply a high voltage (potential difference) to the shock wave electrodes in a liquid medium (conductive liquid) with a certain conductivity, generating a large current instantaneous discharge within a few microseconds. During the discharge process, a high-energy-density, high-temperature, high-pressure plasma region is formed on the discharge channel, causing the discharge channel to expand rapidly and forming a pressure pulse, i.e., a shock wave, in the liquid medium. In addition to generating shock waves, some electrical energy is also converted into heat and light during the discharge process.

[0025] In practical operation, the fault states that prevent the shock wave electrode from discharging and breaking down due to the circuit containing the shock wave electrode include both open circuit and short circuit. When the circuit containing the shock wave electrode is short-circuited, a large current will still be generated in the circuit, similar in magnitude to the current in the circuit containing the shock wave electrode when it discharges and breaks down. Therefore, existing technology can detect the situation where the shock wave electrode cannot release a therapeutic shock wave when the circuit is open-circuited, but cannot detect the situation where the shock wave electrode cannot release a therapeutic shock wave when the circuit is short-circuited. Thus, it is impossible to accurately determine whether the shock wave electrode is releasing a therapeutic shock wave.

[0026] In this application, the inventors propose to determine whether the shock wave electrode releases a therapeutic shock wave based on whether the voltage of the circuit where the shock wave electrode is located (i.e., the discharge circuit) shows a drop-up or rise-down edge.

[0027] Simultaneously with the release of the shock wave by the shock wave electrode, the voltage across its terminals drops instantaneously due to the rapid release of energy. If the circuit containing the shock wave electrode is open-circuited, the electrode will be unable to discharge and release the shock wave, and the voltage across its terminals will not drop instantaneously. If the circuit containing the shock wave electrode is short-circuited, it will be unable to apply a high-voltage signal to the two terminals of the electrode, preventing discharge and release of the shock wave, and the voltage across its terminals will not drop instantaneously. Based on this, this application proposes that the release of a therapeutic shock wave by detecting whether a rising edge appears in the voltage across the shock wave electrode can be determined, regardless of whether the circuit containing the electrode is open-circuited or short-circuited.

[0028] As shown in Figures 3 and 4, this application 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. The at least one detection circuit is connected to the at least one discharge circuit in a one-to-one correspondence. 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.

[0029] This application uses a detection circuit to detect whether the voltage of the discharge circuit drops, thereby determining whether the shock wave electrode in the discharge circuit releases a therapeutic shock wave. This allows for the detection of both open circuits and short circuits in the discharge circuit, preventing the shock wave electrode from releasing a therapeutic shock wave, thus achieving the goal of accurately determining whether the shock wave electrode releases a therapeutic shock wave.

[0030] Specifically, the detection circuit includes:

[0031] One end of the current adjustment resistor R1 is electrically connected to one end of the corresponding discharge circuit.

[0032] The optocoupler has one end of its input side electrically connected to the other end of the current adjustment resistor R1, and the other end of its input side electrically connected to the other end of the discharge circuit. The optocoupler can detect voltage drops in the discharge circuit.

[0033] This application enables accurate monitoring of whether a shock wave electrode has successfully released a therapeutic shock wave. Specifically, the combination of the current adjustment resistor R1 and the optocoupler in the detection circuit allows the system to identify whether the shock wave electrode is discharging normally by monitoring whether there is a voltage drop in the circuit.

[0034] Furthermore, this technical solution can simultaneously detect short-circuit and open-circuit faults in the shock wave electrodes. By monitoring voltage changes at the optocoupler output, the system can identify whether the electrodes have failed to discharge properly due to a short circuit or open circuit, which is crucial for the safe operation of medical equipment and the effectiveness of treatment. This fault detection capability ensures the safety and effectiveness of the medical process, avoiding risks to patients caused by equipment malfunctions.

[0035] It should be noted that the sensitivity of the detection circuit can be adjusted by selecting different values ​​for the current adjustment resistor R1. When higher sensitivity is required, a smaller value for the current adjustment resistor R1 can be selected. However, the resistance of the current adjustment resistor R1 should not be too small, as this will result in greater energy consumption, thus reducing the energy (including light and mechanical energy) carried by the shock wave released by the shock wave electrode. In practice, the resistance value of the current adjustment resistor R1 can be selected based on the minimum drive current and rated current of the optocoupler. Provided that the optocoupler drive is sufficient, the larger the resistance value of the current adjustment resistor R1, the less energy it consumes, and the greater the energy carried by the shock wave released by the shock wave electrode. Furthermore, because the width of the high-voltage pulse during shock wave electrode discharge is 1μs-2μs, a fast optocoupler should be selected; generally, a nanosecond-level optocoupler is sufficient to meet the requirements.

[0036] 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, and the other end of the high-voltage power supply is electrically connected to the other end of the first capacitor C1. The first rectifier diode D1 is disposed between one end of the high-voltage power supply and one end of the first capacitor C1.

[0037] In one feasible implementation, the boost circuit enables efficient voltage conversion and energy storage. The connection between the high-voltage power supply and the first capacitor C1 allows the circuit to accumulate a large amount of electrical energy in a short time, while the use of the first rectifier diode D1 ensures unidirectional current flow. This design facilitates the rapid release of high voltage when needed, meeting the instantaneous high voltage requirements of specific devices.

[0038] Preferably, the boost circuit further includes a control module for controlling the high-voltage power supply to be turned on and off.

[0039] The control module allows for precise management of the high-voltage power supply's status, enabling remote or automatic control of its on / off operation. Furthermore, the addition of the control module enhances the circuit's reliability and stability. Upon detecting a fault, the control module can quickly disconnect the high-voltage power supply, preventing further damage and protecting the circuit from harm. Moreover, by adjusting the high-voltage power supply's output voltage, the control module allows for more precise control, meeting the demands of different loads and improving the overall system efficiency and performance.

[0040] 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 shown in Figure 3, in this embodiment of the application, there is one shock wave electrode, and a high-voltage power supply can provide energy to the shock wave electrode, thereby achieving shock wave electrode breakdown and generating arc discharge.

[0041] Preferably, as shown in FIG4, the discharge circuit includes at least one second capacitor C2, and the 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.

[0042] After the introduction of the second capacitor C2, the current in the pre-breakdown stage mainly flows through the second capacitor C2 and stores the energy in the second capacitor C2. When the shock wave electrode breaks down, this part of the energy in the second capacitor C2 can be released into the shock wave electrode, thereby improving the energy release efficiency and reducing the ablation of the shock wave electrode.

[0043] The second capacitor C2 acts as an energy node, allowing the high-voltage power supply to first charge the second capacitor C2 and the shock wave electrode. Then, the second capacitor C2 discharges to the shock wave electrode. Through the energy storage function of the second capacitor C2, a high-amplitude and long-pulse-width pulse current is achieved in the circuit where the second capacitor C2 discharges to the shock wave electrode, enabling the shock wave electrode to release shock waves with high energy. At the same time, during the pre-breakdown stage of the shock wave electrode, the shunting effect of the second capacitor C2 can effectively reduce the loss of the shock wave electrode due to melting and ablation, effectively extending the service life of the shock wave electrode and enabling the shock wave electrode to release a sufficient number of shock waves for better therapeutic effect.

[0044] The mechanical energy carried by the shock wave depends on the electrical energy released from the second capacitor C2 onto the shock wave electrode, and no longer depends on the electrical energy accumulated on the shock wave electrode. This makes the mechanical energy carried by the shock wave no longer limited by the structural design of the shock wave electrode. At the same time, it also weakens the influence of the polarity of the shock wave electrode on the mechanical energy carried by the shock wave.

[0045] When the voltage across the shock wave electrode reaches its breakdown voltage, the shock wave electrode enters the pre-breakdown stage, at which point it begins to melt and ablate. Due to the current shunting effect 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 generated by the converted electrical energy on the shock wave electrode is also reduced. Consequently, the heat loss due to melting and ablation of the shock wave electrode is also reduced, thus extending the service life of the shock wave electrode.

[0046] The second capacitor C2 can absorb the high-frequency signal components generated by the high-voltage power supply due to the conduction and turn-off of the switching electronic components, greatly reducing the high-frequency noise radiated outward, and has the technical effect of reducing high-frequency noise and reducing electromagnetic interference.

[0047] The shock wave power supply also includes a switching component Q1 that controls whether the shock wave electrode discharges and a current-limiting resistor R2 that protects 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.

[0048] Preferably, the shock wave power supply also includes a control chip (processor), which is electrically connected to the switching component Q1 and the detection circuit.

[0049] First, this design makes the power supply system control more intelligent and precise. The control chip can monitor and adjust the state of the switching component Q1 in real time, as well as detect the operation of the circuit, thereby achieving precise control of the surge power supply. This intelligent management not only improves the response speed and control accuracy of the power supply system, but also helps to enhance its stability and reliability.

[0050] Secondly, the electrical connection between the control chip and the detection circuit enables effective real-time monitoring and fault diagnosis of the shock wave power supply's operating status. The control chip receives signals from the detection circuit, analyzes the power supply's operating status, and promptly identifies and addresses potential problems. This real-time monitoring and response mechanism improves the reliability and stability of the power supply system, reduces maintenance costs, and provides crucial data support for power supply maintenance and performance optimization.

[0051] This application also provides a shock wave release detection method, which uses the aforementioned shock wave power supply. The shock wave release detection method includes:

[0052] 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, and the output voltage Vout of the optocoupler is high at this time.

[0053] When the switching component Q1 is turned on, the LED in the optocoupler emits light, the first MOSFET in the optocoupler is turned off and the second MOSFET is turned on. At this time, the output voltage Vout of the voltage detection circuit is low. When the shock wave electrode discharges, the voltage across the shock wave electrode drops instantaneously to 0V. At this time, the LED in the optocoupler does not emit light, the first MOSFET in the optocoupler is turned on and the second MOSFET is turned off. At this time, the output voltage Vout of the optocoupler is high, thus forming a voltage rising edge.

[0054] When the circuit containing 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 the output voltage Vout in the optocoupler is high at this time.

[0055] When the circuit containing the shock wave electrode 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, and at this time the output voltage Vout of the optocoupler is low.

[0056] This application can detect both open circuits and short circuits in the electrode, covering both fault states of the circuit where the shock wave electrode is located, thus achieving the goal of completely detecting the state of the circuit where the shock wave electrode is located.

[0057] The above description is merely a specific embodiment of this application and should not be construed as limiting the scope of the invention. Therefore, any substitution of equivalent components or equivalent changes and modifications made within the scope of protection of this patent application should still fall within the scope of this patent. Furthermore, the technical features, technical features and technical solutions, and technical solutions in this application 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 and all the 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 the corresponding discharge circuit, and the other end of the detection circuit is electrically connected to the other end of the corresponding discharge circuit.

2. The shockwave power supply of claim 1, wherein, The detection circuit includes: One end of the current adjustment resistor is electrically connected to one end of the corresponding discharge circuit. An optocoupler has one end of its input side electrically connected to the other end of a current adjustment resistor, and the other end of its input side electrically connected to the other end of the discharge circuit. The optocoupler is capable of detecting voltage drops in the discharge circuit.

3. 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, and the other end of the high-voltage power supply is electrically connected to the other end of the first capacitor. The first rectifier diode is electrically connected between one end of the high-voltage power supply and one end of the first capacitor.

4. The shockwave power supply of claim 3, wherein, The boost circuit also includes a control module for controlling the high-voltage power supply to turn on and off.

5. The shockwave power supply of claim 1, wherein, 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.

6. The shockwave power supply of claim 5, wherein, The discharge circuit includes at least one second capacitor, which is electrically connected to at least one shock wave electrode in a one-to-one correspondence. One end of the second capacitor is electrically connected to one end of the corresponding shock wave electrode, and the other end of the second capacitor is electrically connected to the other end of the corresponding shock wave electrode.

7. The shock wave power supply according to claim 1, characterized in that, The shock wave power supply also 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.

8. The shock wave power supply according to claim 7, characterized in that, The shock wave power supply also includes a control chip, which is electrically connected to the switching components and the detection circuit.

9. A shock wave release detection method, using the aforementioned shock wave power supply, characterized in that, The shock wave power supply is the shock wave power supply according to any one of claims 1 to 8.

10. The shock wave release detection method according to claim 9, characterized in that, include: 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 high level; When the switching component is turned on, the LED in the optocoupler emits light, the first MOSFET in the optocoupler is turned off and the second MOSFET is turned on. At this time, the output voltage Vout of the voltage detection circuit is low. When the shock wave electrode discharges, the voltage across the shock wave electrode drops instantaneously to 0V. At this time, the LED in the optocoupler does not emit light, the first MOSFET in the optocoupler is turned on and the second MOSFET is turned off. At this time, the output voltage Vout of the optocoupler is high, 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 the output voltage Vout in the optocoupler is high level at this time. When the shock wave electrode is disconnected, 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 low.

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