CN108508488A - A kind of plasma focus transmitting battle array of pressure resistance entrant sound structure - Google Patents
A kind of plasma focus transmitting battle array of pressure resistance entrant sound structure Download PDFInfo
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- CN108508488A CN108508488A CN201810359131.7A CN201810359131A CN108508488A CN 108508488 A CN108508488 A CN 108508488A CN 201810359131 A CN201810359131 A CN 201810359131A CN 108508488 A CN108508488 A CN 108508488A
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- battle array
- pressure
- entrant sound
- pressure resistance
- resistant
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
- G01V1/38—Seismology; Seismic or acoustic prospecting or detecting specially adapted for water-covered areas
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
- G01V1/02—Generating seismic energy
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- Engineering & Computer Science (AREA)
- Remote Sensing (AREA)
- Acoustics & Sound (AREA)
- Environmental & Geological Engineering (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- General Physics & Mathematics (AREA)
- Geophysics (AREA)
- Oceanography (AREA)
- Geophysics And Detection Of Objects (AREA)
Abstract
The invention discloses a kind of plasma focus of pressure-resistant entrant sound structure to emit battle array, the built-in multi-electrode transmitting battle array and a pressure-resistant entrant sound shell for connecing low pressure for connecing high pressure including one, multi-electrode transmitting battle array is sealed in pressure-resistant entrant sound shell by pressure-resistant entrant sound shell, and is equipped with the water injection hole with end socket.Built-in multi-electrode transmitting battle array is traditional line electrode or micro-porous electrode, it is contemplated that voltage endurance, pressure-resistant entrant sound shell are cylindrical structure, and wall surface is acoustic window material；The binding post of transmitting battle array is designed by insulation and pressure resistance, accomplishes the isolation with pressure-resistant sound-penetrating apparatus.Seawater is injected inside housings, and reserved part air provides elastic space for Bubble Growth Process, ensures the violent expansion of bubble.Using the present invention, plasma focus may be implemented can effectively inspire source level height and the low ping of dominant frequency under deep water superelevation hydrostatic pressure.
Description
Technical field
The invention belongs to plasma focus technical fields, and in particular to a kind of plasma focus of pressure resistance entrant sound structure
Emit battle array.
Background technology
Spark source or plasma focus based on the research and development of water mesohigh Impulse Discharge Stimulation Technique have been successfully applied to sea
Foreign high-resolution seismic survey.Transmitting battle array is load or the electro-acoustic conversion device of electric spark or plasma focus.Electric spark shakes
The emission electrode structure that source or plasma focus use includes mainly electrode emits battle array etc. to, multi-electrode.Based on impulse electric corona
The plasma focus of electric discharge the advantages that due to lower voltage class and reproducible pulse signal, has been successfully applied to sea
Foreign high-resolution seismic exploration detection.For the parameters such as the electroacoustic efficiency and the acoustic source separation that improve plasma focus, plasma
The multi-electrode transmitting battle array of body focus has been obtained for commonly used.
In recent years, demand of the country to deep-sea exploration gradually increases, the high-resolution seismic exploration being badly in need of under development deep water conditions
Exploration engineering.However, can not meet with long range propagation loss, the towing of traditional focus sea since Fresnel radius increases
High-resolution seismic survey requirement.It is to solve the problems, such as this most direct effective ways that Seismic Source System is dragged deeply.However, on the one hand
Waterproof insulation design is only done in the design of conventional sponges transmitting battle array from structure, does not consider pressure-bearing design, on the other hand, studies table
Bright deep-sea superelevation hydrostatic pressure has very strong inhibiting effect to the ping of generation, including source level reduces and dominant frequency acutely increases
Greatly.Therefore, directly by legacy transmission battle array carry out it is deep drag and infeasible, need to redesign.
For legacy transmission battle array, the mechanism of electroacoustic conversion is that eletrode tip generates larger field when applying high-voltage pulse
Strong and current density eletrode tip water body is heated to be formed bubble by gasification and generates electron avalanche immediately, and electric energy is rapidly injected gas
In bubble, plasma discharge acutely carries out, and high temperature and pressure is generated inside bubble, and bubble acutely expands.When hydrostatic pressure reaches
When to 20MPa, the expansion process of bubble will be pressed in plasma discharge processes, it is difficult to inspire strong ping, together
When, the pulsation period of bubble is also acutely suppressed, and dominant frequency is caused drastically to increase, and is reduced the vertical of plasma focus and is penetrated depth
Degree.
Invention content
For above-mentioned technical problem of the existing technology, the present invention provides a kind of plasma sound of pressure-resistant entrant sound structure
Source emits battle array, may be implemented that plasma focus can effectively inspire source level height under deep water superelevation hydrostatic pressure and dominant frequency is low
Ping.
A kind of plasma sound source transmitting battle array of pressure resistance entrant sound structure, including a built-in multi-electrode transmitting for connecing high pressure
Multi-electrode transmitting battle array is sealed in pressure-resistant entrant sound by battle array and a pressure-resistant entrant sound shell for connecing low pressure, the pressure resistance entrant sound shell
In shell, and it is equipped with the water injection hole with end socket.
On the one hand pressure-resistant entrant sound shell can bear the high hydrostatic pressure environment in deep-sea, on the other hand, since it is to excitation
The reflection and absorption of ping are smaller, and ping can be transmitted as far as possible under smaller acoustic pressure loss.
The multi-electrode transmitting battle array can select traditional line electrode or micro-porous electrode.
In order to reach voltage endurance, the pressure resistance entrant sound shell could be provided as cylindrical structure, and wall surface is acoustic window material.
Carbon fibre material may be used in the wall surface of the pressure resistance entrant sound shell.
The multi-electrode transmitting battle array is cylinder packings, and the multi-electrode transmitting battle array structure of cylinder can be with pressure-resistant entrant sound shell
It couples well.
The both ends of the pressure resistance entrant sound shell are equipped with end cap end socket, and one end is high pressure incoming end, another is water injection end.
The multi-electrode transmitting battle array is equipped with high tension terminal, and the high tension terminal passes through after the isolating seal of insulation
High pressure incoming end.
The pressure resistance entrant sound shell needs to be packed into high-conductivity solution before work, can be in deep water superelevation hydrostatic pressure
Lower generation plasma discharge excites source level height and the low ping of dominant frequency.
Pressure hull internal solution cannot be filled, and be vacuumized before needing reserved part air or sealing, ensure to put for a long time
Electric internal pressure is stablized.
The water injection hole can be used for water filling or vacuum pumping.
The course of work of the present invention is as follows：Built-in multi-electrode transmitting battle array is placed in pressure-resistant entrant sound shell, connecing for battle array is emitted
Terminal is designed by insulation and pressure resistance, accomplishes the isolation with pressure-resistant sound-penetrating apparatus.Seawater is injected inside housings, and reserved part is empty
Gas provides elastic space for Bubble Growth Process, ensures the violent expansion of bubble.Under deep water superelevation hydrostatic pressure, pressure resistance is thoroughly
Sound shell can completely cut off external pressure, and built-in electrode battle array can realize electric discharge at low pressures, and excite and be equal to conventional hair
The pulse acoustical signal for penetrating battle array is transmitted to seabed through the entrant sound wall surface of shell.
The present invention passes through emits the pressure-resistant entrant sound shell of setting outside battle array in conventional multi-electrode so that built-in electrode battle array can compared with
Electric discharge is realized under low-pressure, and excites the pulse acoustical signal for being equal to conventional transmitting battle array, and sea is transmitted to through the entrant sound wall surface of shell
Bottom.
Description of the drawings
Fig. 1 is the structural schematic diagram that a kind of plasma focus of pressure-resistant entrant sound structure of the present invention emits battle array；
The pulse sound signal graph that Fig. 2 embodiment of the present invention is radiated when single pulse energy is 500J.
Wherein, 1 is high tension terminal；2 be low tension terminal；3 emit battle array for multi-electrode；4 be pressure-resistant entrant sound shell；5 are
Insulating support；6 be water filling port.
Specific implementation mode
Present invention is further described in detail with embodiment below in conjunction with the accompanying drawings, need to understand that description below is only this hair
Bright most preferred embodiment, and should not be considered as the limitation for the scope of the present invention.
As shown in Figure 1, a kind of plasma focus of pressure resistance entrant sound structure emits battle array, including one connects high tension terminal 1
A built-in multi-electrode transmitting battle array 3 and pressure-resistant entrant sound shell 4 for connecing low tension terminal 2, the both ends of pressure-resistant entrant sound shell 4 are all provided with
It is high pressure incoming end to have end cap end socket, one end, another is water injection end.Pressure-resistant entrant sound shell 4 is by insulating support 5 by multi-electrode
Transmitting battle array 3 is fixed in pressure-resistant 4 body of entrant sound shell, and is equipped with the water injection hole 6 with end socket.
In the present embodiment, battle array is emitted using the pressure-resistant entrant sound of a carbon fiber shell and built-in cylinder micro-porous electrode, wherein
Cylinder micro-porous electrode structure can well be coupled with carbon fiber shell.The end cap end socket of carbon fiber shell is Stainless steel 316 L materials
Matter, one is high pressure incoming end, another is water injection end.High pressure incoming end is isolated by ceramic insulator, high-voltage connection
Column passes through ceramic insulator, is used in combination ceramic gland that ceramic insulator and end cap end socket are carried out end face seal.High tension terminal and
Built-in multi-electrode transmitting battle array connection, and do water-proofing treatment.End cap end socket is attached by radial seal and carbon fiber shell.Most
Afterwards, seawater is injected by enclosure interior by water injection hole 6, water injection hole end socket is connected on end cap end socket by reserved part space.Extremely
This, can connect high-voltage pulse power source, realize all-bottom sound impulse ejection.
When single pulse energy is 500J, capacitor charging voltage is about -4kV.By 50m coaxial cables, electricity will be stored in
Electric energy in appearance is discharged into shell.In implementation, the offshore sea waters that the depth of water is 50m or so carries out, and pressure-resistant entrant sound emits battle array sinking
10m, wherein being arranged in the position of 1m for measuring the hydrophone of acoustical signal.Water temperature is about 15 DEG C, and conductivity is about 53mS/
cm.Carbon fiber shell internal diameter 80mm, length 400mm, micro-porous electrode micro-pore diameter are about 1mm, hole depth 2mm, and micropore number is
40。
As shown in Fig. 2, giving the pulse acoustical signal radiated when single pulse energy is 500J.The result shows that using pressure resistance
The multi-electrode transmitting battle array of entrant sound shell can go out ping with Net long wave radiation, solve the reduction of ping source level and dominant frequency liter for deep drag
High problem.
Although the present embodiment is not carried out in the deeper depth of water, due to the effect of pressure-resistant acoustic window material, it is ensured that internal discharge
The wavelet signal of excitation will not all change under any depth condition.
Above-described embodiment is used for illustrating the present invention, rather than limits the invention, the present invention spirit and
In scope of the claims, to any modifications and changes that the present invention makes, protection scope of the present invention is both fallen within.
Claims (7)
1. a kind of plasma focus of pressure resistance entrant sound structure emits battle array, which is characterized in that connect the built-in of high pressure including one
Multi-electrode emits battle array and a pressure-resistant entrant sound shell for connecing low pressure, and the pressure resistance entrant sound shell seals multi-electrode transmitting battle array
In pressure-resistant entrant sound shell, and it is equipped with the water injection hole with end socket.
2. the plasma focus of pressure resistance entrant sound structure according to claim 1 emits battle array, which is characterized in that described mostly electric
It is line electrode or micro-porous electrode that pole, which emits battle array,.
3. the plasma focus of pressure resistance entrant sound structure according to claim 1 emits battle array, which is characterized in that described mostly electric
It is cylinder packings that pole, which emits battle array,.
4. the plasma focus of pressure resistance entrant sound structure according to claim 1 emits battle array, which is characterized in that the pressure resistance
Entrant sound shell is cylindrical structure, and wall surface is acoustic window material.
5. the plasma focus of pressure resistance entrant sound structure according to claim 4 emits battle array, which is characterized in that the pressure resistance
The wall surface of entrant sound shell uses carbon fibre material.
6. the plasma focus of pressure resistance entrant sound structure according to claim 1 emits battle array, which is characterized in that the pressure resistance
The both ends of entrant sound shell are equipped with end cap end socket, and one end is high pressure incoming end, another is water injection end.
7. the plasma focus of pressure resistance entrant sound structure according to claim 6 emits battle array, which is characterized in that described mostly electric
Pole emits battle array and is equipped with high tension terminal, and the high tension terminal passes through high pressure incoming end after the isolating seal of insulation.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810359131.7A CN108508488A (en) | 2018-04-20 | 2018-04-20 | A kind of plasma focus transmitting battle array of pressure resistance entrant sound structure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810359131.7A CN108508488A (en) | 2018-04-20 | 2018-04-20 | A kind of plasma focus transmitting battle array of pressure resistance entrant sound structure |
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| CN108508488A true CN108508488A (en) | 2018-09-07 |
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| CN201810359131.7A Pending CN108508488A (en) | 2018-04-20 | 2018-04-20 | A kind of plasma focus transmitting battle array of pressure resistance entrant sound structure |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113176605A (en) * | 2021-04-25 | 2021-07-27 | 浙江理工大学 | Low-frequency electroacoustic transmitting array for suppressing bubble pulse based on symmetrical hard interface structure |
| CN113685168A (en) * | 2021-08-13 | 2021-11-23 | 西安石油大学 | Impulse sound source micropore electrode detection system and using method thereof |
| CN117310793A (en) * | 2023-11-29 | 2023-12-29 | 自然资源部第一海洋研究所 | Deepwater seismic source transmitting array capable of being continuously excited and working method thereof |
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| US20020141288A1 (en) * | 2000-10-20 | 2002-10-03 | Bechtel Bwxt Idaho, Llc | Regenerative combustion device |
| CN102176051A (en) * | 2011-01-24 | 2011-09-07 | 浙江大学 | Deep-towed split-type pulse plasma source system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113176605A (en) * | 2021-04-25 | 2021-07-27 | 浙江理工大学 | Low-frequency electroacoustic transmitting array for suppressing bubble pulse based on symmetrical hard interface structure |
| CN113176605B (en) * | 2021-04-25 | 2022-11-11 | 浙江理工大学 | Low-frequency electroacoustic transmitting array for suppressing bubble pulse based on symmetrical hard interface structure |
| CN113685168A (en) * | 2021-08-13 | 2021-11-23 | 西安石油大学 | Impulse sound source micropore electrode detection system and using method thereof |
| CN117310793A (en) * | 2023-11-29 | 2023-12-29 | 自然资源部第一海洋研究所 | Deepwater seismic source transmitting array capable of being continuously excited and working method thereof |
| CN117310793B (en) * | 2023-11-29 | 2024-02-06 | 自然资源部第一海洋研究所 | Deepwater seismic source transmitting array capable of being continuously excited and working method thereof |
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Application publication date: 20180907 |