Plasma source emission array with pressure-resistant and sound-permeable structure
A technology of plasma and emission array, which is applied in seismology and seismic energy generation in areas covered by water, which can solve the problem of rising main frequency, difficulty in exciting strong acoustic pulses, and reducing the verticality of the plasma source. Penetration depth etc.
Inactive Publication Date: 2018-09-07
ZHEJIANG UNIV
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Problems solved by technology
When the hydrostatic pressure reaches 20MPa, the expansion process of the bubbles in the plasma discharge process will be suppressed, and it is difficult to stimulate a strong sound pulse. Vertical penetration depth of the plasma source
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[0021] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the following description is only the most preferred embodiment of the present invention, and should not be considered as limiting the protection scope of the present invention.
[0022] Such as figure 1 As shown, a plasma source emission array with a pressure-resistant and sound-transmitting structure includes a built-in multi-electrode emission array 3 connected to a high-voltage terminal 1 and a pressure-resistant and sound-transmitting housing 4 connected to a low-voltage terminal 2. Both ends of the acoustic shell 4 are provided with end caps, one end is a high-voltage access end, and the other is a water injection end. The pressure-resistant sound-transmitting housing 4 fixes the multi-electrode emission array 3 in the pressure-resistant sound-transmitting housing 4 through an insulating bracket 5 , and is provided ...
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The invention discloses a plasma source emission array of a pressure-resistant and sound-permeable structure. The plasma source emission array comprises a built-in multi-electrode emission array connected to a high voltage and a pressure-resistant and sound-permeable casing connected with a low voltage. A multi-electrode emission array is sealed in the pressure-resistant and sound-permeable casing, and the pressure-resistant and sound-permeable casing is provided with a water injection hole provided with a plug. The built-in multi-electrode emission array is a conventional line electrode or amicropore electrode. In consideration of the pressure resistant characteristics, the pressure-resistant and sound-permeable casing is of a cylindrical structure, and the wall of the pressure-resistantand sound-permeable casing is made of a sound-permeable material. A binding post of the emission array achieves the isolation from a pressure-resistant and sound-permeable device through an insulating and pressure-resistant design. Seawater is injected into the casing, part of air is preserved, an elastic space is provided for the bubble expansion process, and fierce expansion of bubbles is ensured. By utilizing the plasma source emission array, a plasma earthquake source can effectively excite a sound pulse signal with high source level and low main frequency under the ultra-high water static pressure of deep water.
Description
technical field [0001] The invention belongs to the field of plasma seismic source technology, and in particular relates to a plasma seismic source emitting array with a pressure-resistant and sound-permeable structure. Background technique [0002] The spark source or plasma source developed based on high-voltage pulse discharge technology in water has been successfully applied to marine high-resolution seismic exploration. The emission array is the load or electro-acoustic conversion device of the electric spark or plasma source. The emitter electrode structure used in the spark source or plasma source mainly includes electrode pairs, multi-electrode emitter arrays, etc. Plasma sources based on pulsed corona discharges have been successfully used in marine high-resolution seismic detection due to their low voltage level and good pulse signal repeatability. In order to improve the electro-acoustic efficiency of the plasma source and the directivity of the sound source and...
Claims
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Login to View More IPC IPC(8): G01V1/38G01V1/02
CPCG01V1/02G01V1/38
Inventor 张连成黄逸凡刘振闫克平
Owner ZHEJIANG UNIV