CN119157600B - A shock wave pulse generating device - Google Patents
A shock wave pulse generating device Download PDFInfo
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- CN119157600B CN119157600B CN202411339117.2A CN202411339117A CN119157600B CN 119157600 B CN119157600 B CN 119157600B CN 202411339117 A CN202411339117 A CN 202411339117A CN 119157600 B CN119157600 B CN 119157600B
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- 230000035939 shock Effects 0.000 title claims abstract description 72
- 238000004146 energy storage Methods 0.000 claims abstract description 21
- 239000012530 fluid Substances 0.000 claims abstract description 10
- 230000009471 action Effects 0.000 claims abstract description 5
- 238000002955 isolation Methods 0.000 claims description 11
- 238000001514 detection method Methods 0.000 claims description 8
- 230000004913 activation Effects 0.000 claims description 6
- 230000001960 triggered effect Effects 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract description 3
- 239000003990 capacitor Substances 0.000 description 18
- 101000645421 Homo sapiens Transmembrane protein 165 Proteins 0.000 description 14
- 102100025755 Transmembrane protein 165 Human genes 0.000 description 14
- 239000002504 physiological saline solution Substances 0.000 description 14
- 238000006243 chemical reaction Methods 0.000 description 5
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical group [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 4
- 230000002308 calcification Effects 0.000 description 4
- 230000003213 activating effect Effects 0.000 description 3
- 230000005284 excitation Effects 0.000 description 3
- 239000011780 sodium chloride Substances 0.000 description 3
- 230000003966 vascular damage Effects 0.000 description 3
- 210000004204 blood vessel Anatomy 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010891 electric arc Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
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- 230000002411 adverse Effects 0.000 description 1
- 210000003445 biliary tract Anatomy 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000009172 bursting Effects 0.000 description 1
- 230000010485 coping Effects 0.000 description 1
- 210000004351 coronary vessel Anatomy 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000010892 electric spark Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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- 210000005259 peripheral blood Anatomy 0.000 description 1
- 239000011886 peripheral blood Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 210000001635 urinary tract Anatomy 0.000 description 1
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- A61B17/22—Implements for squeezing-off ulcers or the like on inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; for invasive removal or destruction of calculus using mechanical vibrations; for removing obstructions in blood vessels, not otherwise provided for
- A61B17/22004—Implements for squeezing-off ulcers or the like on inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; for invasive removal or destruction of calculus using mechanical vibrations; for removing obstructions in blood vessels, not otherwise provided for using mechanical vibrations, e.g. ultrasonic shock waves
- A61B17/22012—Implements for squeezing-off ulcers or the like on inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; for invasive removal or destruction of calculus using mechanical vibrations; for removing obstructions in blood vessels, not otherwise provided for using mechanical vibrations, e.g. ultrasonic shock waves in direct contact with, or very close to, the obstruction or concrement
- A61B17/22022—Implements for squeezing-off ulcers or the like on inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; for invasive removal or destruction of calculus using mechanical vibrations; for removing obstructions in blood vessels, not otherwise provided for using mechanical vibrations, e.g. ultrasonic shock waves in direct contact with, or very close to, the obstruction or concrement using electric discharge
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- A61B17/22—Implements for squeezing-off ulcers or the like on inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; for invasive removal or destruction of calculus using mechanical vibrations; for removing obstructions in blood vessels, not otherwise provided for
- A61B17/22004—Implements for squeezing-off ulcers or the like on inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; for invasive removal or destruction of calculus using mechanical vibrations; for removing obstructions in blood vessels, not otherwise provided for using mechanical vibrations, e.g. ultrasonic shock waves
- A61B17/22012—Implements for squeezing-off ulcers or the like on inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; for invasive removal or destruction of calculus using mechanical vibrations; for removing obstructions in blood vessels, not otherwise provided for using mechanical vibrations, e.g. ultrasonic shock waves in direct contact with, or very close to, the obstruction or concrement
- A61B2017/22025—Implements for squeezing-off ulcers or the like on inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; for invasive removal or destruction of calculus using mechanical vibrations; for removing obstructions in blood vessels, not otherwise provided for using mechanical vibrations, e.g. ultrasonic shock waves in direct contact with, or very close to, the obstruction or concrement applying a shock wave
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- A61B17/22—Implements for squeezing-off ulcers or the like on inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; for invasive removal or destruction of calculus using mechanical vibrations; for removing obstructions in blood vessels, not otherwise provided for
- A61B2017/22051—Implements for squeezing-off ulcers or the like on inner organs of the body; Implements for scraping-out cavities of body organs, e.g. bones; for invasive removal or destruction of calculus using mechanical vibrations; for removing obstructions in blood vessels, not otherwise provided for with an inflatable part, e.g. balloon, for positioning, blocking, or immobilisation
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Abstract
本发明公开了一种冲击波脉冲发生装置，包括微处理器、第一电源、第二电源、第三电源、冲击波发生器、第一储能器和第二储能器，以及气体放电管开关和低压电子开关，所述微处理器，用于在第一时间段和第二时间段，控制第一电源为第一储能器充电，第二电源为第二储能器充电；在第二时间段控制第三电源作用在冲击波发生器的电极两端，激活电极之间的流体；在第三时间段，触发低压电子开关闭合，在第二储能器作用下气体放电管开关导通，从而使得第一储能器作用在冲击波发生器的电极两端，产生冲击波。本发明采用气体放电管触发的方式来产生冲击波，可以降低成本，缩小装置的体积，并且控制简便。
The present invention discloses a shock wave pulse generating device, comprising a microprocessor, a first power supply, a second power supply, a third power supply, a shock wave generator, a first energy storage device and a second energy storage device, as well as a gas discharge tube switch and a low-voltage electronic switch, wherein the microprocessor is used to control the first power supply to charge the first energy storage device and the second power supply to charge the second energy storage device in a first time period and a second time period; in the second time period, the third power supply is controlled to act on both ends of the electrodes of the shock wave generator to activate the fluid between the electrodes; in the third time period, the low-voltage electronic switch is triggered to close, and the gas discharge tube switch is turned on under the action of the second energy storage device, so that the first energy storage device acts on both ends of the electrodes of the shock wave generator to generate shock waves. The present invention uses a gas discharge tube triggering method to generate shock waves, which can reduce costs, reduce the size of the device, and is simple to control.
Description
Technical Field
The application belongs to the technical field of medical appliances, and particularly relates to a shock wave pulse generating device.
Background
The liquid-electric lithotripsy technology has been widely used for calcification deposition treatment of urinary tract and biliary tract, and has been gradually used for calcification lithotripsy treatment in coronary artery and peripheral blood vessel in recent years. Under the drive of high-voltage pulse, the metal electrode in physiological saline solution forms electric arc between two electrodes, and the electric arc instantaneously ionizes physiological saline solution to generate plasma and gas, and at the same time, shock wave is generated, and calcification in blood vessel absorbs the shock wave and leads to calcification micro-fragmentation.
The electrohydraulic lithotripsy device generally comprises a shock wave generator in the form of a pair of electrodes, an energy store, which generally employs a high voltage capacitor, and a pulse generator, which generally employs a high voltage electronic switching device (IGBT). The high-voltage electronic switching device is used for generating narrow voltage pulses of nS-uS levels, and high voltage is often required to achieve certain impulse energy of impulse waves, and the impulse instant current is at least more than one hundred amperes, so that the high-voltage electronic switching device can have better impulse treatment effect generally above 3 kV. Therefore, it is required to use an electronic switching device which is withstand voltage of at least 3kV or more and which is resistant to a large current of several hundred amperes, however, a single-tube electronic switching device which satisfies this use condition is very costly and bulky. At present, a plurality of application schemes for coping with high voltage resistance and high current are arranged in parallel and in series, the cost and the volume of the schemes still have no advantages, and the control is more complicated.
In addition, the energy of each high-voltage pulse is stored in the high-voltage capacitor in advance, a part of the stored energy in the high-voltage capacitor is consumed before spark discharge, a part of the energy is remained in the capacitor, and only about 1/2 of the energy is used for generating electric sparks to form shock waves. Because the energy conversion efficiency is not high, excessive energy is generally required to be pre-stored on the high-voltage capacitor, if the high-voltage electronic switch fails singly (cannot be disconnected after being turned on), the excessive energy is likely to be directly applied to the electrode, and the conditions of electrode burst, balloon rupture and vascular damage are likely to happen. Of course, designing a large-sized electrode can improve the energy tolerance of the electrode and improve the electrode bursting problem, however, the large-sized electrode has adverse effects on the trafficability of the balloon in the blood vessel, and balloon catheters with small diameter size are widely demanded in the market at present.
Disclosure of Invention
The application aims to provide a shock wave pulse generating device, which solves the problems of high cost and large volume of a high-voltage electronic switching device in the prior art, and solves the problems of low energy storage conversion efficiency, easy electrode burst caused by excessive energy and the like in the prior art.
In order to achieve the above purpose, the technical scheme of the application is as follows:
A shock wave pulse generating device comprising a microprocessor, a first power source, a second power source, a third power source, a shock wave generator, a first energy storage and a second energy storage, and a gas discharge tube switch for communicating the first energy storage to the shock wave generator and a low voltage electronic switch for communicating the second energy storage to the gas discharge tube switch, wherein:
The microprocessor is used for controlling the first power supply to charge the first energy accumulator and controlling the second power supply to charge the second energy accumulator in a first time period and a second time period, controlling the third power supply to act on two ends of an electrode of the shock wave generator in the second time period to activate fluid between the electrodes, triggering the closing of the low-voltage electronic switch in the third time period, and conducting the gas discharge tube switch under the action of the second energy accumulator, so that the first energy accumulator acts on two ends of the electrode of the shock wave generator to generate shock waves.
Further, the first power supply provides a charging voltage of 500 volts to 10000 volts.
Further, the second power supply provides a charging voltage of 50 volts to 1200 volts.
Further, the third power supply provides an activation voltage of 10 volts to 100 volts.
Further, a load resistor is arranged between the two electrodes of the shock wave generator.
Further, the third power supply is connected to both ends of the electrode of the shock wave generator through a high-voltage diode.
Further, a freewheel diode is arranged between the two electrodes of the shock wave generator.
Further, the first energy accumulator is further connected with a current detection resistor in series, and the current detection resistor is connected to the microprocessor through the current limiting circuit and the first isolation optocoupler.
Further, the low-voltage electronic switch is optically coupled to the microprocessor through a second isolation optical coupling.
The application provides a shock wave pulse generating device which is used for activating physiological saline solution in advance and then generating shock waves in a mode of triggering a gas discharge tube. By adopting the mode of triggering the gas discharge tube, the cost can be reduced, the volume of the device is reduced, and the control is simple and convenient. When the high voltage on the first energy accumulator is directly applied to the electrode, the physiological saline solution between the electrodes can be immediately ionized to generate sparks, and meanwhile, shock waves are released, so that the energy conversion efficiency can be improved, the energy storage requirement on the first energy accumulator is reduced, the cost of the first energy accumulator is reduced, and the conditions of electrode burst, balloon rupture and vascular damage are avoided. And the shock wave is generated instantaneously after triggering, so that the speed is high, and the operation is convenient.
Drawings
Fig. 1 is a schematic circuit diagram of a shock wave pulse generator according to the present application.
FIG. 2 is a timing diagram illustrating the operation of the shock wave pulse generator of the present application.
Detailed Description
The present application will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present application more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application.
In one embodiment of the present application, as shown in FIG. 1, a shock wave pulse generating device is provided.
The shock wave pulse generating device comprises a microprocessor, a first power supply, a second power supply, a third power supply, a shock wave generator, a first energy accumulator, a second energy accumulator, a gas discharge tube switch for communicating the first energy accumulator to the shock wave generator and a low-voltage electronic switch for communicating the second energy accumulator to the gas discharge tube switch, wherein:
The microprocessor is used for controlling the first power supply to charge the first energy accumulator and controlling the second power supply to charge the second energy accumulator in a first time period and a second time period, controlling the third power supply to act on two ends of an electrode of the shock wave generator in the second time period to activate fluid between the electrodes, triggering the closing of the low-voltage electronic switch in the third time period, and conducting the gas discharge tube switch under the action of the second energy accumulator, so that the first energy accumulator acts on two ends of the electrode of the shock wave generator to generate shock waves.
Specifically, the present embodiment employs a gas discharge tube instead of a conventional high-voltage electronic switching device (IGBT) to reduce the cost, reduce the size of the device, and make control easy.
The gas discharge tube is connected in series between the first power supply and the shock wave generator, which is an electrode, the two electrodes of the shock wave generator being in a fluid (typically a physiological saline solution).
In this embodiment, the second power supply is used to charge the second energy storage, the second energy storage is connected to the trigger electrode of the gas discharge tube through the low-voltage electronic switch, and when the low-voltage electronic switch is turned on, the gas discharge tube is triggered to be turned on, so that the first energy storage acts on two ends of the electrode of the shock wave generator to generate shock waves. When the high voltage on the first accumulator is directly applied to the electrodes, the physiological saline solution between the immediately ionizable electrodes produces sparks while releasing the shock wave.
In the embodiment, the gas discharge tube is triggered to be conducted through the linkage of the second power supply, the second energy accumulator and the low-voltage electronic switch, so that the shock wave generator generates shock waves, and the traditional high-voltage electronic switch device can be avoided.
In order to solve the problem of low energy conversion efficiency, the third power supply is used to pre-activate the fluid between the electrodes at both ends of the electrodes of the shock wave generator. Specifically, a third power supply is applied to two ends of an electrode of the shock wave generator to activate the fluid. When the high voltage on the first accumulator is directly applied to the electrodes after the fluid is activated, the physiological saline solution between the immediately ionizable electrodes produces a spark while releasing the shock wave when the low voltage electronic switch is closed. Because the high voltage on the first energy accumulator is directly used for generating sparks and releasing shock waves, the energy conversion efficiency of the first energy accumulator is improved, the energy storage requirement of the first energy accumulator is reduced, and the conditions of electrode burst, balloon rupture and vascular damage are avoided.
The first power supply, the second power supply and the third power supply in this embodiment are all direct current power supplies with a current limiting function. The first power supply charges the first energy accumulator and provides a charging voltage of 500 v-10000 v, i.e. between 500 v and 10000 v, which will not be described in detail below. The second power supply charges the second energy storage device and provides a charging voltage of 50-1200 volts. A third power supply is applied across the electrodes of the shock wave generator for activating the fluid, providing an activation voltage of 10 volts to 100 volts.
The microprocessor of the embodiment is used for controlling the working time of each power supply and controlling the working time of the low-voltage electronic switch.
In operation, the first power supply charges the first memory and the second power supply charges the second memory. A third power supply is applied across the electrodes of the shock wave generator for activating the fluid. Before the first power supply acts on the electrode, a third power supply acts on two ends of the electrode to activate physiological saline solution between the electrodes, so that sparks can be excited instantly when the first power supply acts on the electrode. The second energy accumulator is connected to the trigger electrode of the gas discharge tube through the low-voltage electronic switch, and is controlled by the microprocessor, and after the low-voltage electronic switch is closed, the voltage of the second energy accumulator acts on the trigger electrode of the gas discharge tube to trigger the gas discharge tube to conduct. When the voltage of the first memory acts on the electrode in the physiological saline solution after the gas discharge tube is conducted, the physiological saline solution between two ends of the electrode is instantaneously ionized to generate sparks and at the same time, shock wave pulse is generated.
In a specific embodiment, as shown in fig. 1, the first power supply charges the first energy store, which uses a high-voltage capacitor C1, which acts on both electrodes (hv+, HV-) of the shock wave generator via a gas discharge tube GDT 1. The second power supply charges the second energy storage, the second energy storage adopts a capacitor C2, and the capacitor C2 is connected to the trigger electrode T of the gas discharge tube GDT1 through a low-voltage electronic switch.
For example, the gas discharge tube GDT1 can be TG-244 of CPclare company, which has practical withstand voltage of 1.2-4.2kV (which can be used for the application of 3kV of the first power supply), and the gas discharge tube has smaller size and the widest part is not more than 30mm, so that the volume of the whole device can be effectively reduced. The T pole (trigger pole) of GDT1 is connected to a low voltage electronic switch, the other two poles (A pole and O pole, A pole being adjacent electrodes, O pole being opposite electrode) of GDT1, wherein the A pole is connected to Ground (GND) and the O pole is connected to the HV-electrode of the shock wave generator.
The third power supply is connected across the electrodes of the shock wave generator via a high voltage diode D2. The high-voltage diode D2 provides a unidirectional channel for the voltage generated by the third power supply, and is reversely cut off to prevent the third power supply from being damaged by the high voltage of the first power supply.
The microprocessor is also connected to the low-voltage electronic switch through an isolating optocoupler 2 to control the closing or opening of the low-voltage electronic switch.
And a load resistor R2 is further arranged between the two electrodes of the shock wave generator and used for providing the minimum maintaining current for the gas discharge tube and ensuring the reliable conduction of the gas discharge tube.
Because the GDT1 characteristic of the gas discharge tube requires a certain minimum holding current to keep on state after it is excited, when some special conditions, such as electrode or electrode open circuit, are met, and no current loop will flow through the GDT1, the gas inside the GDT1 will be extinguished, and the on state cannot be ensured, so that in the electrode or electrode open circuit condition, as long as the GDT1 is excited, the load resistor R2 ensures that a current is generated between hv+ and HV-to flow through the GDT1, maintaining the GDT1 in the on state. When the load resistor R2 is 1kΩ and the first power supply is 3kV, the GDT1 is excited, and a holding current of about 3A is generated in the load resistor R2, so that the GDT1 is reliably turned on.
And a freewheeling diode D1 is arranged between the two electrodes of the shock wave generator, the electrode load presents a certain inductance, and the freewheeling diode D1 provides a current freewheeling channel.
In practical application, certain inductance exists between the electrode and the electrode wire, in some special cases, for example, when pulse occurs, a pulse loop is suddenly disconnected (for example, the electrode and the electrode wire are suddenly disconnected), instant current generated on the electrode is not released, high voltage can be formed to damage other components, a secondary instant large current follow current channel can be provided by increasing D1, and instant large current can flow through the loops in the directions of HV+, electrode, HV and D1 to follow current when the pulse discharge loop is disconnected, so that the components are prevented from being damaged by high voltage.
The operation sequence of the device of this embodiment is shown in fig. 2, in which the uppermost graph of fig. 2 shows the relationship between the voltages of the first power supply, the second power supply and the third power supply and time, the middle graph shows the relationship between the operation state of the gas discharge tube GDT1 and time, and the lowermost graph shows the relationship between the current I4 and time. The working process comprises three time periods, namely a t0-t1 preparation phase, a t1-t2 activation phase and a t2-t3 spark excitation phase.
First time period, t0-t1 preparation phase:
The microprocessor controls the first power supply to be turned on and keeps working state, and the output current I1 of the microprocessor slowly charges the high-voltage capacitor C1, and the high-voltage capacitor C1 is charged to the target voltage V1 and maintained before the time t 1.
The microprocessor controls the second power supply and the first power supply to be simultaneously started and kept in a working state, a certain time difference is allowed, the output current I2 of the microprocessor slowly charges C2, and the microprocessor charges the target voltage V2 and maintains the target voltage V2 before the time t 1.
During this time, the low-voltage electronic switch is in an off state, and the gas discharge tube fails to be triggered to be in a high blocking on state (GDT 1 operation state is off in fig. 2). The third power supply is always in an off state during this period.
In a specific embodiment, the t0-t1 time period is between 100 ms-1S.
Second time period, t1-t2 activation phase:
The microprocessor controls the third power supply to work to generate an adjustable V3 voltage of 10-100V, the adjustable V3 voltage is acted on two ends of the electrode through the high-voltage diode D2, a current I3 is formed under the action of the voltage V3 voltage, one part of the current I3 flows through the load resistor R2, the other part of the current I3 flows through the electrode to form a current I4 on the electrode, the current I4 is typically 10-50mA, the physiological saline solution is slowly electrolyzed to generate charged ions and tiny bubbles, a conductive channel is formed between the electrodes, and the process is called activation of the physiological saline solution. The size of the generated bubbles is related to the solubility of the solution with the voltage and the time for applying the V3 voltage, and in order to ensure that the size of the bubbles is controllable and the physiological saline solution between the electrodes can be reliably activated, the application time of the V3 is preferably 1mS-50 mS;
During this period, the second power supply is always on, but the low-voltage electronic switch is always off, so C2 always maintains the target voltage V2.
During this period, the first power supply is always in an operating state, and the gas discharge tube is in an off state (GDT 1 in fig. 2 is in an operating state off), so the high-voltage capacitor C1 always maintains the target voltage V1.
Third period of time t2-t3 spark excitation phase:
The third power supply is applied until the expected time T3, the saline between the electrodes is fully activated to reach the condition of spark excitation, at this time, the microprocessor controls the low-voltage electronic switch to be closed through the isolating optocoupler 2, the energy stored by the capacitor C2 acts on the trigger stage (T stage) of the gas discharge tube through the low-voltage electronic switch, the gas in the whole gas discharge tube is activated, meanwhile, the O pole and the A pole are conducted (the working state of the GDT1 in figure 2 is conducted), the voltage on the high-voltage capacitor C1 directly acts on the electrodes, and the saline between the electrodes can be ionized immediately when the saline between the two ends of the electrodes is directly applied on the electrodes at this time, so that the high-voltage capacitor C1 releases shock waves until the energy of the high-voltage capacitor C1 is discharged.
The duration of the t2-t3 stage is about 0.5-5uS, during which time the energy on the high voltage capacitor C1 is released to the two ends of the electrodes, an instant spark discharge current I4 is formed between the electrodes, and a current I7 is formed on the load resistor R2, but I7 is far smaller than I4, and the instant current of I4 is 50-500A. After the resistor R1 detects the spark discharge current I6, I6 is approximately equal to I4. The current limiting circuit and the isolation optocoupler 1 are used for feeding back to the microprocessor to indicate that the spark triggering is successful.
In a specific embodiment, the first energy storage is further connected in series with a current detection resistor, and the current detection resistor is connected to the microprocessor through a current limiting circuit and a first isolation optocoupler.
Specifically, the high-voltage capacitor C1 is also connected in series with a current detection resistor R1,0.1-1 ohm, and is used for detecting spark current. The current detection resistor R1 is connected to the microprocessor through a current limiting circuit and an isolation optocoupler 1.
After the resistor R1 detects the spark discharge current I6, the spark discharge current I6 is fed back to the microprocessor through the current limiting circuit and the isolation optocoupler 1 to indicate that the spark triggering is successful.
In this embodiment, the isolation optocoupler is used for electrical isolation and signal transmission, and will not be described here again.
It should be noted that, the first power supply, the second power supply and the third power supply are all turned off at time t 3. And the successful spark triggering indicates the arrival of the time t3, and the microprocessor simultaneously controls the three power supplies to be turned off.
The shock wave pulse generating device provided by the application is simple in control, stable and reliable, low in cost and small in size.
The 3kV-4kV withstand voltage IGBT small-size switch tube is packaged for example by TO247, the current resistance is generally within 50A, at least two parallel connection use is needed in actual use TO achieve the current resistance, in some pulse voltage (for example, 5kV-10 kV) application with higher voltage, 2 strings or 3 strings are needed TO be used in series connection, each tube needs TO be matched with an isolation suspension driving circuit, the control is very complex, the instantaneous high-voltage and high-current discharge state in the IGBT operation is very large, and the reliable driving of the multiple IGBTs in series connection presents a very great challenge. The gas discharge tube switch is conducted without a complex and precise driving circuit, the cost of a single gas discharge tube switch is low, and the control circuit is simple. The IGBT series-parallel connection uses a plurality of high-voltage IGBTs, and is matched with an isolation suspension driving circuit of a load, so that the volume is far greater than that of a scheme of a gas switch discharge tube.
In addition, because the voltage generated by the third power supply activates the physiological saline solution between the electrodes in advance, the energy on the high-voltage capacitor C1 acts on both ends of the electrodes to excite sparks at the moment of conducting the gas discharge tube, so that shock waves are generated, the waiting time Td does not exist, the energy is used for generating the shock waves, the unnecessary consumption does not exist, the temperature rise of the electrodes is lower, and the service life of the electrodes is prolonged. The voltage applied to the two ends of the electrode is controllable and fixed each time, so that the stability and consistency of the impulse wave pulse are improved.
The above examples illustrate only a few embodiments of the application, which are described in detail and are not to be construed as limiting the scope of the application. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. Accordingly, the scope of protection of the present application is to be determined by the appended claims.
Claims (9)
1. A shock wave pulse generating device, characterized in that the shock wave pulse generating device comprises a microprocessor, a first power supply, a second power supply, a third power supply, a shock wave generator, a first energy accumulator and a second energy accumulator, and a gas discharge tube switch for communicating the first energy accumulator to the shock wave generator and a low voltage electronic switch for communicating the second energy accumulator to the gas discharge tube switch, wherein:
The microprocessor is used for controlling the first power supply to charge the first energy accumulator and controlling the second power supply to charge the second energy accumulator in a first time period and a second time period, controlling the third power supply to act on two ends of an electrode of the shock wave generator in the second time period to activate fluid between the electrodes, triggering the closing of the low-voltage electronic switch in the third time period, and conducting the gas discharge tube switch under the action of the second energy accumulator, so that the first energy accumulator acts on two ends of the electrode of the shock wave generator to generate shock waves.
2. The shock wave pulse generating device of claim 1, wherein the first power source provides a charging voltage of 500 volts to 10000 volts.
3. The shockwave pulse generating device of claim 1, wherein said second power supply provides a charging voltage of 50 volts to 1200 volts.
4. The shock wave pulse generating device of claim 1, wherein the third power source provides an activation voltage of 10 volts to 100 volts.
5. The shockwave pulse generating device according to claim 1, wherein a load resistor is arranged between two electrodes of the shockwave generator.
6. The shock wave pulse generating device according to claim 1, wherein the third power supply is connected across the electrodes of the shock wave generator via a high voltage diode.
7. The shockwave pulse generating device according to claim 1, wherein a freewheel diode is arranged between two electrodes of the shockwave generator.
8. The shock wave pulse generating device according to claim 1, wherein the first energy storage is further connected in series with a current detection resistor, and the current detection resistor is connected to the microprocessor through a current limiting circuit and a first isolation optocoupler.
9. The shock wave pulse generating device of claim 1, wherein the low voltage electronic switch is coupled to the microprocessor through a second isolated optocoupler.
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| CN202411339117.2A CN119157600B (en) | 2024-09-25 | 2024-09-25 | A shock wave pulse generating device |
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| CN104619272A (en) * | 2012-09-13 | 2015-05-13 | 冲击波医疗公司 | Shockwave catheter system with energy control |
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| GB677571A (en) * | 1950-03-13 | 1952-08-20 | Nat Res Dev | Electrical pulse generators employing gaseous discharge tubes |
| CA2933622A1 (en) * | 2013-12-13 | 2015-06-18 | Chevron U.S.A. Inc. | System and methods for controlled fracturing in formations |
| CN109702134B (en) * | 2018-12-20 | 2020-04-07 | 杭州电子科技大学 | Electro-hydraulic riveting device and riveting method thereof |
| DE102018133356A1 (en) * | 2018-12-21 | 2020-06-25 | Ferton Holding S.A. | Pressure wave device and method for treating a human or animal body |
| CN115051691A (en) * | 2022-06-22 | 2022-09-13 | 上海蓝帆博元医疗科技有限公司 | High-voltage pulse generating device and shock wave generating system |
| KR102570924B1 (en) * | 2022-08-29 | 2023-08-28 | 한국전기연구원 | Switch, pulse generator and method of controling pulse generator |
| CN115389852A (en) * | 2022-09-23 | 2022-11-25 | 苏州中荟医疗科技有限公司 | High-voltage pulse generator for identifying catheter, catheter identification device and shock wave device |
| CN115664386B (en) * | 2022-12-20 | 2023-03-21 | 乐普（北京）医疗器械股份有限公司 | Pulse generation equipment and pulse generation voltage adjusting method and device |
| CN117155348A (en) * | 2023-09-08 | 2023-12-01 | 西南科技大学 | A high-current pulse power supply based on gas discharge tube |
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| CN101573848A (en) * | 2007-01-04 | 2009-11-04 | 德恩及索恩两合股份有限公司 | Overvoltage protection devices for use in direct current networks, especially for photovoltaic installations |
| CN104619272A (en) * | 2012-09-13 | 2015-05-13 | 冲击波医疗公司 | Shockwave catheter system with energy control |
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