CN109741730B - Underwater plasma sound source directional radiation device - Google Patents
Underwater plasma sound source directional radiation device Download PDFInfo
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- CN109741730B CN109741730B CN201910061889.7A CN201910061889A CN109741730B CN 109741730 B CN109741730 B CN 109741730B CN 201910061889 A CN201910061889 A CN 201910061889A CN 109741730 B CN109741730 B CN 109741730B
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Abstract
The invention discloses a sound source radiation device, relates to an underwater plasma sound source directional radiation device, and aims to solve the problems of the existing device that the end face of a discharge electrode head is not ablation-resistant, is not uniform in ablation, is easy to deform, is not easy to replace after being damaged, has poor insulation and water tightness, and is used for improving the problems of high operation difficulty, complex process and the like of an energy collection scheme of peak sound pressure of a plasma sound source. The technical points of the invention comprise: the device comprises a rigid paraboloid sound baffle, an anode conical support rod, an anode discharge electrode, a cathode insulating medium support table and a flange disc; the bottom of the rigid paraboloid sound baffle is connected with the center of the flange disc; screw holes for sealing and fixedly connecting external plasma sound source equipment are distributed on the flange disc; the anode conical support rod is connected with the inner side of the rigid paraboloid sound baffle; the discharge centers of the anode discharge electrode and the cathode discharge electrode corresponding to the head ends are positioned on the focus of the paraboloid of the rigid paraboloid sound baffle.
Description
Technical Field
The invention relates to a sound source radiation device, in particular to an underwater plasma sound source directional radiation device.
Background
The working principle of the underwater plasma sound source, also called an electric spark sound source, is based on the theory of 'liquid-electricity effect' proposed by Susan scientist in Utex, namely that high-voltage and large-current pulse discharge is carried out in a liquid medium to generate strong shock waves to realize acoustic energy radiation. The plasma sound source has the characteristics of high power, narrow pulse width, wide frequency spectrum and the like, and can be widely applied to the fields of pipeline descaling, sewage treatment, sanitary disinfection, marine geological exploration and the like.
The plasma sound source system is provided with a large-capacity energy storage capacitor, and when the plasma sound source system works normally, the plasma sound source system discharges electricity into the underwater electrode channel within microsecond-level time to form a high-temperature and high-pressure plasma channel, so that surrounding water media are vaporized, the pressure is spread outwards at a high speed, and radiation sound pulses are formed.
The ultra-high temperature (10-100 kilo-pascal) and ultra-high pressure (10-100 kilo-pascal) plasma channels have higher requirements on the high temperature resistance, ablation resistance, impact resistance and other performances of the discharge electrode, and the waveform of the radiated acoustic pulse is greatly influenced by the deformation or uneven ablation of the end face of the electrode head.
In the prior art, the disclosed sound source radiation device often has certain defects, the end face of a discharge electrode head of the conventional device is not ablation-resistant, the phenomena of uneven ablation, easy deformation and the like are easy to occur, the service life of the electrode is mostly limited, and the electrode is often not easy to replace after being damaged; meanwhile, the existing device has poor insulation and water tightness, the energy collecting method for improving the peak sound pressure of the plasma sound source has the problems of difficult engineering realization, high operation difficulty, complex operation process and the like, and the existing energy collecting method is not considered and designed from the perspective of reducing the inductance of a system loop to improve the peak sound pressure.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: aiming at the existing problems, the underwater plasma sound source directional radiation device is provided to solve the problems that the end face of a discharge electrode head is not ablation-resistant, is not uniform in ablation, is easy to deform, is not easy to replace after being damaged, is poor in insulation and water tightness, and is used for improving the problems that the energy collection method of the peak sound pressure of the plasma sound source is difficult to implement, large in operation difficulty, complex in operation process and the like.
The technical scheme adopted by the invention is as follows:
comprises a rigid paraboloid sound baffle, an anode conical support rod, an anode discharge electrode, a cathode insulating medium support table and a flange disc; the bottom of the rigid paraboloid sound baffle is connected with the center of the flange disc; threaded through holes for sealing and fixedly connecting external plasma sound source equipment are distributed on the flange disc; the anode conical support rod is connected with the inner side of the rigid paraboloid sound baffle; the center of the anode conical support rod is of a rectangular platform structure, the tail end of the anode discharge electrode is connected to the center of the rectangular platform structure on the anode conical support rod, and the head end of the anode discharge electrode faces the bottom of the rigid paraboloid sound baffle; the cathode insulating medium supporting table is fixedly connected to the center of the rigid paraboloid sound baffle in a sealing manner; the tail end of the cathode discharge electrode is connected to the center of the cathode insulating medium support table, and the head end of the cathode discharge electrode corresponds to the head end of the anode discharge electrode; and the discharge centers corresponding to the head ends of the anode discharge electrode and the cathode discharge electrode are positioned on the focus of the paraboloid of the rigid paraboloid sound baffle.
Furthermore, the rigid paraboloid sound baffle is of a hollow structure, and a vacuumizing interface is arranged on the rigid paraboloid sound baffle and can be used for carrying out vacuum treatment on the paraboloid sound baffle. After the rigid paraboloid sound baffle is treated in vacuum, because sound waves can not be transmitted in vacuum, a part of transmitted waves of the conventional sound baffle can be converted into reflected waves, and the energy-gathering effect of the sound baffle is further improved.
Furthermore, the rigid paraboloid sound baffle, the anode conical supporting rod and the flange disc are formed by adopting a numerical control milling machine and a welding technology.
Furthermore, the center of the rectangular platform structure on the anode conical support rod is provided with a threaded through hole with internal threads, the tail end of the anode discharge electrode is provided with external threads matched with the internal threads, and the anode discharge electrode is fixedly connected with the anode conical support rod in a sealing manner through the threaded structure.
Furthermore, a threaded hole with internal threads is formed in the center of the cathode insulating medium support platform, external threads matched with the internal threads are formed in the tail end of the cathode discharge electrode, and the cathode discharge electrode and the cathode insulating medium support platform are fixedly connected in a sealed mode through the threaded structure.
Furthermore, a threaded through hole in the center of the rectangular platform structure on the anode conical support rod and a threaded hole in the center of the cathode insulating medium support platform are of a coaxial structure.
Further, the anode discharge electrode and the cathode discharge electrode are of the same cylindrical structure, the discharge electrode is made of molybdenum steel, the end face of the discharge electrode head is a plane with a small chamfer, and the angle of the small chamfer is not larger than 35 degrees.
Further, the discharge distance between the anode discharge electrode head end and the cathode discharge electrode head end and the position of the discharge center can be adjusted through the thread structure at the tail end of the discharge electrode.
Furthermore, two grooves are symmetrically preset in the middle of the discharge electrode, and the grooves are used for providing a support plane for fastening the discharge electrode for other auxiliary clamps.
Further, the cathode insulating medium support platform is a cylindrical round platform, external threads are arranged on the outer surface of the cathode insulating medium support platform, a threaded hole matched with the cathode insulating medium support platform in size is formed in the center of the rigid parabolic sound baffle, and the cathode insulating medium support platform and the rigid parabolic sound baffle are fixedly connected in a sealed mode through the threaded structure.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
1. the sound source radiation device provided by the invention has the advantages of simple structure, few part types, easiness in disassembly, assembly and replacement, convenience in operation and easiness in popularization;
2. the rigid paraboloid sound baffle, the anode conical supporting rod and the flange disc which are processed by the numerical control machine tool in a welding mode greatly improve the mechanical strength and the heavy current resistance of the device, have good shock resistance and stable structure, play a good role in sound source directional radiation by an energy collection method of the position matching of the rigid paraboloid sound baffle and the discharge electrode, and can be widely applied to underwater high-power and strong-impact sound source systems of marine geological exploration, marine investigation, underwater target detection, sanitary disinfection and the like; the rigid hollow paraboloid sound baffle is creatively provided, after vacuum treatment, a part of transmitted waves of the conventional sound baffle can be converted into reflected waves because sound waves cannot be transmitted in vacuum, and the energy gathering effect is better than that of the prior paraboloid sound baffle. The spectral level of the loud acoustic pulse can be improved overall. Is more suitable for geological exploration and marine investigation.
3. The components of the sound source radiation device provided by the invention are connected in a threaded manner, and compared with other connection manners such as welding and the like, the sound source radiation device has better stability and water tightness, and provides conditions for long-time underwater operation;
4. the sound source radiation device provided by the invention has the advantages that the discharge electrode is improved, the electrode is the core of sound waves generated by plasma discharge, two methods are adopted at the electrode, 1) through discharge tests of dozens of and long-term electrode materials, finally, the molybdenum steel has excellent ablation resistance and creep resistance, and the molybdenum steel is used for the plasma discharge electrode, so that the service life is greatly prolonged. 2) A chamfer is formed on the section of the discharge electrode, and the angle is less than 35 degrees, so that the method can realize discharge current equalization. In the discharging process, because the instantaneous current is too large, the electrode end face can be greatly broken and replaced by adopting a point discharging method, the service life is shortened, and after the electrode is used for many times, if the discharging end face is changed, the later discharging is not uniform, the generated sound wave shape and amplitude are changed, and the later use is seriously influenced. The method of adopting certain chamfer not only can provide life, can guarantee simultaneously that after repetitious usage, the sound wave form has higher repeatability, is convenient for later stage to use. The problem of waveform instability is solved.
The ablation phenomenon of the electrode is relieved, the service life of the electrode in a high-current and high-temperature environment is prolonged, the replacement frequency of the electrode is reduced, meanwhile, the tail end of the electrode is designed into a threaded structure, and only the electrode needs to be replaced even if the serious ablation phenomenon occurs, the directional radiation device does not need to be replaced integrally, so that the use and maintenance cost is greatly reduced, and the operation is more flexible and convenient;
5. the sound source radiation device provided by the invention has the advantages that the cathode discharge electrode is arranged on the cathode insulation medium support table, so that the cathode discharge electrode and the anode discharge electrode are effectively isolated, the breakdown ignition phenomenon generated in the ultrahigh-voltage discharge process can be prevented, the cathode insulation medium support table is fixedly connected with the rigid paraboloid sound baffle in a sealing manner in a threaded manner, the sound source radiation device has a good watertight effect, and the device can be effectively ensured not to leak water in normal work.
Drawings
The invention will now be described, by way of example, with reference to the accompanying drawings, in which:
FIG. 1 is a cross-sectional view of an underwater plasma sound source directional radiation device;
FIG. 2 is a schematic structural diagram of a discharge electrode of the underwater plasma sound source directional radiation device;
the mark in the figure is:
1 is a rigid hollow parabolic sound baffle; 2 is an anode conical support rod; 3 is an anode discharge electrode; 4 a cathode discharge electrode; 5 is a cathode insulating medium support table; 6 is a threaded through hole; and 7 is a flange disc.
Detailed Description
All of the features disclosed in this specification, or all of the steps in any method or process so disclosed, may be combined in any combination, except combinations of features and/or steps that are mutually exclusive.
Any feature disclosed in this specification may be replaced by alternative features serving equivalent or similar purposes, unless expressly stated otherwise. That is, unless expressly stated otherwise, each feature is only an example of a generic series of equivalent or similar features.
Example 1:
the invention provides a preferred embodiment of an underwater plasma sound source directional radiation device, which is shown in figure 1. Comprises a rigid hollow paraboloid sound baffle 1, an anode conical support rod 2, an anode discharge electrode 3, a cathode discharge electrode 4, a cathode insulating medium support table 5 and a flange disc 7; the bottom of the rigid hollow paraboloid sound baffle 1 is connected with the center of the flange disk 7; threaded through holes 6 for fixedly connecting external plasma sound source equipment in a sealing manner are distributed on the flange disc 7; the anode conical support rod 2 is connected with the inner side of the rigid paraboloid sound baffle 1; the center of the anode conical support rod 2 is of a rectangular platform structure, the tail end of the anode discharge electrode 3 is connected to the center of the rectangular platform structure on the anode conical support rod 2, and the head end of the anode discharge electrode 3 faces the bottom of the rigid hollow paraboloid sound baffle 1; the cathode insulating medium support table 5 is fixedly connected to the center of the rigid hollow paraboloid sound baffle 1 in a sealing manner; the tail end of the cathode discharge electrode 4 is connected with the center of the cathode insulating medium support table 5, and the head end of the cathode discharge electrode 4 corresponds to the head end of the anode discharge electrode 3; the discharge centers of the anode discharge electrode 3 and the cathode discharge electrode 4 corresponding to the head ends thereof are located at the focus of the paraboloid of the rigid hollow paraboloid sound baffle 1.
In the preferred embodiment of the invention, the rigid paraboloid sound baffle 1, the anode conical support rod 2 and the flange disk 7 are formed by adopting a numerical control milling machine and welding processing, the mechanical strength and the large current resistance of the device are greatly improved, the shock resistance is good, and the structure is more stable. The axial position of an anode discharge electrode 3 is limited by the integrally formed rigid hollow paraboloid sound baffle 1 and the anode conical support rod 2, and the discharge center of the discharge electrode can be ensured to be just positioned on the focus of the paraboloid of the rigid paraboloid sound baffle 1 through strict calculation and debugging; compared with a welding connection mode, the integrally formed rigid paraboloid sound baffle 1 and the flange disc 7 avoid the phenomenon that the energy gathering effect is influenced due to the eccentricity of the sound focus. The rigid hollow paraboloid sound baffle 1 is provided with a vacuumizing interface and can be used for carrying out vacuum treatment on the paraboloid sound baffle.
A threaded through hole with internal threads is formed in the center of the rectangular platform structure on the anode conical support rod 2, external threads matched with the internal threads are formed in the tail end of the anode discharge electrode 3, and the anode discharge electrode 3 and the anode conical support rod 2 are in sealed fixed connection through the threaded structure; a threaded hole with internal threads is formed in the center of the cathode insulating medium support table 5, external threads matched with the internal threads are formed in the tail end of the cathode discharge electrode 4, and the cathode discharge electrode 4 and the cathode insulating medium support table 5 are in sealed fixed connection through the threaded structure; the discharge distance between the head end of the anode discharge electrode 3 and the head end of the cathode discharge electrode 4 and the position of a discharge center can be adjusted through a thread structure at the tail end of the discharge electrode; the threaded through hole in the center of the rectangular platform structure on the anode conical support rod 2 and the threaded hole in the center of the cathode insulating medium support table 5 are of a coaxial structure; the cathode insulating medium support platform 5 is a cylindrical round table, external threads are arranged on the outer surface of the cathode insulating medium support platform 5, a threaded hole matched with the cathode insulating medium support platform 5 in size is formed in the center of the rigid parabolic sound baffle 1, and the cathode insulating medium support platform 5 is fixedly connected with the rigid parabolic sound baffle 1 in a sealed mode through the threaded structure.
In the preferred embodiment of the invention, the radius of the paraboloid sound baffle 1 of the rigid hollow paraboloid sound baffle 1 is obtained by repeatedly calculating by utilizing the ray acoustics principle, the discharge distance between the head end of the anode discharge electrode 3 and the head end of the cathode discharge electrode 4 and the position of the discharge center can be adjusted by the thread structure at the tail end of the discharge electrode, and the discharge center is adjusted to be positioned on the focus of the paraboloid of the rigid paraboloid sound baffle 1, so that the sound source focused by the hollow paraboloid sound baffle 1 can be improved by more than 10dB, and the electroacoustic conversion efficiency of the device can be optimized by adjusting the discharge distance between the head end of the cathode discharge electrode 4 and the head end of the anode discharge electrode 3. In actual use, along with the continuous ablation of the discharge electrode, the discharge distance between the head end of the cathode discharge electrode 4 and the head end of the anode discharge electrode 3 can be continuously changed, and the discharge distance can be conveniently adjusted in time by utilizing the threaded connection mode of the tail end of the discharge electrode, so that the optimal electroacoustic conversion efficiency is always ensured; the energy-gathering method of the rigid paraboloid sound baffle 1 and the discharge electrode position matching can well play a role in sound source directional radiation, and can be widely applied to underwater high-power and strong-impact sound source systems for marine geological exploration, marine investigation, underwater target detection, sanitation disinfection and the like.
In the preferred embodiment of the invention, the flange disc 7 is distributed with the thread through holes 6 for sealing and fixedly connecting the external plasma sound source equipment, and all components of the device are connected in a thread way, so that compared with other connection ways such as welding and the like, the device has better stability, air tightness and water tightness, and provides conditions for long-time underwater operation.
In the preferred embodiment of the invention, the threaded through hole at the center of the rectangular platform structure on the anode conical support rod 2 and the threaded hole at the center of the cathode insulating medium support table 5 are in a coaxial structure, so that the cathode insulating medium support table 5 can play a role of limiting the axial position of the cathode discharge electrode, so that the cathode discharge electrode 4 and the anode discharge electrode 3 are positioned on the same axis, and the discharge center of the discharge electrode is ensured to be just positioned at the focus of the paraboloid of the rigid paraboloid sound baffle 1; the cathode insulating medium support table 5 is made of insulating materials, so that the cathode discharge electrode 4 and the anode discharge electrode 3 can be effectively isolated, and the phenomenon of breakdown and ignition generated in the ultrahigh-voltage discharge process is prevented; in addition, the cathode insulating medium support table 5 and the rigid paraboloid sound baffle 1 are in sealed fixed connection through the thread structure, so that the cathode insulating medium support table has a good watertight effect, is convenient to install, is easy to replace when damaged, and can effectively ensure that the device cannot leak water in normal work.
The invention provides a preferred embodiment of an underwater plasma sound source directional radiation device, and a structural schematic diagram of a discharge electrode of the device is shown in fig. 2. The anode discharge electrode 3 and the cathode discharge electrode 4 are of the same cylindrical structure, the end face of the discharge electrode head is a plane with a small chamfer, and the angle of the small chamfer is not more than 35 degrees; two grooves are symmetrically preset in the middle of the discharge electrode, and the grooves are used for providing support planes for fastening the discharge electrode for other auxiliary clamps.
It should be known that the plasma sound source is a kind of ultra-high voltage, strong current, high power sound source, and the discharge electrode is used as the key device of electroacoustic conversion, and the breakdown current at the moment of discharge is large, the temperature is high, and the serious ablation phenomenon can occur. In the preferred embodiment of the invention, the discharge electrode is improved by repeatedly carrying out point discharge tests on various different electrodes, molybdenum steel is adopted as an electrode material, the end face of the discharge electrode head is set to be a plane with a small chamfer, so that the ablation phenomenon of the electrode is relieved, the service life of the electrode in a high-current and high-temperature environment is prolonged, the replacement frequency of the electrode is reduced, meanwhile, the tail end of the discharge electrode is designed to be a thread structure, and only the electrode needs to be replaced without integrally replacing a directional radiation device even if the severe ablation phenomenon occurs, so that the use and maintenance cost is greatly reduced, and the operation is more flexible and convenient. In the preferred embodiment of the invention, auxiliary fixtures such as latches can be arranged on the anode conical support rod 2 and the cathode insulating medium support table 5, and the discharge electrode can be further fastened through the grooves symmetrically preset in the middle of the anode discharge electrode 3 and the cathode discharge electrode 4, so that the loosening phenomenon which may occur when the discharge electrode works in a high-power environment is prevented, and the change of the discharge distance and the discharge center position caused by the loosening of the discharge electrode is avoided.
Example 2:
this example further illustrates the practical use of the apparatus of the present invention based on the preferred embodiment described in example 1.
A method for using the underwater plasma sound source directional radiation device in embodiment 1:
step 1: a flange disc 7 at the bottom of the device is connected with external plasma sound source equipment through threads for sealing and fixing;
step 2: the cathode insulating medium support table 5 is fixedly connected with a threaded hole in the center of the rigid paraboloid sound baffle 1 in a sealing way through a self threaded structure;
and 3, step 3: connecting an anode discharge electrode 3 with a threaded through hole at the center of a rectangular platform on an anode conical support rod 2 through a tail end threaded structure, wherein the head end faces the bottom of a rigid paraboloid sound baffle 1; connecting a cathode discharge electrode 4 with a threaded hole in the center of a cathode insulating medium support table 5 through a tail end threaded structure, wherein the head end of the cathode discharge electrode is opposite to the head end of an anode discharge electrode 3;
and 4, step 4: the discharge space between the head ends of the cathode discharge electrode 4 and the anode discharge electrode 3 and the position of a discharge center are adjusted through the thread structures at the tail ends of the two electrodes, so that the discharge space is the distance with the optimal electroacoustic conversion efficiency, and the discharge center is positioned on the focus of the paraboloid of the rigid paraboloid sound baffle 1;
and 5: putting the whole device into a water pool, checking the water tightness of the whole device, and checking the connection condition among the components again if water leakage is found;
and 6: if no water leakage is found, normal operation can be started.
The invention is not limited to the foregoing embodiments. The invention extends to any novel feature or any novel combination of features disclosed in this specification and any novel method or process steps or any novel combination of features disclosed.
Claims (9)
1. An underwater plasma sound source directional radiation device is characterized in that: comprises a rigid paraboloid sound baffle, an anode conical support rod, an anode discharge electrode, a cathode insulating medium support table and a flange disc; the bottom of the rigid paraboloid sound baffle is connected with the center of the flange disc; threaded through holes for sealing and fixedly connecting external plasma sound source equipment are distributed on the flange disc; the anode conical support rod is connected with the inner side of the rigid paraboloid sound baffle; the center of the anode conical support rod is of a rectangular platform structure, the tail end of the anode discharge electrode is connected to the center of the rectangular platform structure on the anode conical support rod, and the head end of the anode discharge electrode faces the bottom of the rigid paraboloid sound baffle; the cathode insulating medium support table is fixedly connected to the center of the rigid paraboloid sound baffle in a sealed manner; the tail end of the cathode discharge electrode is connected to the center of the cathode insulating medium support table, and the head end of the cathode discharge electrode corresponds to the head end of the anode discharge electrode; the discharge centers corresponding to the head ends of the anode discharge electrode and the cathode discharge electrode are positioned on the focus of the paraboloid of the rigid paraboloid sound baffle; the anode discharge electrode and the cathode discharge electrode are of the same cylinder structure, the discharge electrode is made of molybdenum steel, the end face of the discharge electrode head is a plane with a small chamfer, and the angle of the small chamfer is not more than 35 degrees.
2. The underwater plasma sound source directional radiation device according to claim 1, wherein: the rigid paraboloid sound baffle is of a hollow structure, and a vacuumizing interface is formed in the rigid paraboloid sound baffle and can be used for carrying out vacuum treatment on the paraboloid sound baffle.
3. The underwater plasma sound source directional radiation device according to claim 1, wherein: the rigid paraboloid sound baffle, the anode conical supporting rod and the flange disc are integrally machined and formed by adopting a numerical control milling machine.
4. The underwater plasma sound source directional radiation device according to claim 1, wherein: the center of the rectangular platform structure on the anode conical support rod is provided with a threaded through hole with internal threads, the tail end of the anode discharge electrode is provided with external threads matched with the internal threads, and the anode discharge electrode is fixedly connected with the anode conical support rod in a sealing manner through the threaded structure.
5. The underwater plasma sound source directional radiation device according to claim 1, wherein: the center of the cathode insulating medium support platform is provided with a threaded hole with internal threads, the tail end of the cathode discharge electrode is provided with external threads matched with the internal threads, and the cathode discharge electrode and the cathode insulating medium support platform are fixedly connected in a sealing mode through the threaded structure.
6. The underwater plasma sound source directional radiation device according to claim 1, wherein: the threaded through hole in the center of the rectangular platform structure on the anode conical support rod and the threaded hole in the center of the cathode insulating medium support platform are of a coaxial structure.
7. The underwater plasma sound source directional radiation device according to claim 1, wherein: the discharge distance between the head end of the anode discharge electrode and the head end of the cathode discharge electrode and the position of a discharge center can be adjusted through a thread structure at the tail end of the discharge electrode.
8. The underwater plasma sound source directional radiation device according to claim 1, wherein: two grooves are symmetrically preset in the middle of the discharge electrode, and the grooves are used for providing support planes for fastening the discharge electrode for other auxiliary clamps.
9. The underwater plasma sound source directional radiation device according to claim 1, wherein: the cathode insulating medium support platform is a cylindrical round platform, external threads are arranged on the outer surface of the cathode insulating medium support platform, a threaded hole matched with the cathode insulating medium support platform in size is formed in the center of the rigid parabolic sound baffle, and the cathode insulating medium support platform and the rigid parabolic sound baffle are fixedly connected in a sealed mode through the threaded structure.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6018502A (en) * | 1998-01-27 | 2000-01-25 | The United States Of America As Represented By The Secretary Of The Navy | Long life coaxial sparker for underwater sound source |
| CN103198825A (en) * | 2013-02-21 | 2013-07-10 | 西北工业大学 | Discharge electrode of underwater plasma sound source |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6018502A (en) * | 1998-01-27 | 2000-01-25 | The United States Of America As Represented By The Secretary Of The Navy | Long life coaxial sparker for underwater sound source |
| CN103198825A (en) * | 2013-02-21 | 2013-07-10 | 西北工业大学 | Discharge electrode of underwater plasma sound source |
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