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Sector conversion method based on seabed cold spring imaging data

A technology of sector transformation and imaging data, applied in the field of ocean observation

Inactive Publication Date: 2018-09-07
QINGDAO INST OF MARINE GEOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The above-mentioned existing technologies are not specifically involved, thus proposing a series of technical difficulties that need to be solved urgently for the current seabed cold seep measurement

Method used

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  • Sector conversion method based on seabed cold spring imaging data
  • Sector conversion method based on seabed cold spring imaging data
  • Sector conversion method based on seabed cold spring imaging data

Examples

Experimental program
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Embodiment 1

[0046] Example 1, such as figure 1 and figure 2 Shown, is to implement the submarine cold seep rapid imaging system of described sector transformation method, and this system mainly includes:

[0047] The detection base array converts electrical signals and acoustic signals at the receiving and transmitting ends according to the set frequency;

[0048] The transceiver unit executes the instructions of the processor unit to determine the transmission frequency of the detection matrix, and receives the electrical signal for filtering and amplification;

[0049] Ethernet switch to complete data transmission and standardization;

[0050] a processor unit that converts the received echo signals into acoustic image pixels using an array signal processing process;

[0051] The image display forms and displays echo intensity acoustic images.

[0052] Among them, the detection array is integrated with multi-frequency array transducers, including multi-frequency transmitting transduc...

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Abstract

The invention provides a sector conversion method based on seabed cold spring imaging data. Beam forming data obtained through Fourier transformation (FFT) undergoes conversion from a polar coordinatesystem to a rectangular coordinate system so as to improve the definition of echo acoustical images and conform to the visual habits of an observer. Sound waves are sent underwater through a transmitting transducer to perform detection, a digital signal processing technique is utilized to convert received signals into sonar images; FFT beam forming calculation is conducted on signal data, and then the data is stored in the sequence of the rectangular coordinate system. The sector conversion method comprises the steps that image data is converted from the polar coordinate system to the rectangular coordinate system, interpolation operation is conducted on image sonar data through coordinate transformation, pixel point values under the rectangular coordinate system are mapped into image data under the polar coordinate system, and then interpolation operation is conducted on images in the polar coordinate system; for images of pixel points (m*n), m*n operation is performed; an interpolation algorithm which is a nearest neighbor interpolation method can be adopted for pixel points under the polar coordinate system.

Description

technical field [0001] The invention relates to a sector transformation method based on seabed cold seep imaging data, belonging to the technical field of ocean observation. Background technique [0002] Submarine cold seep, namely submarine natural gas seepage, is a widely distributed natural phenomenon in the world. Under the action of crustal dynamics, natural gas (mainly thermogenic gas) migrates upwards from the interior of the crust, and leaks into seawater through seabed sediments through migration channels such as pores, cracks, fissures or faults, forming a seafloor bubble plume. Seabed sediments rich in gas hydrates are often found in plume-developed areas. [0003] On-the-spot measurement of submarine cold seep activities is a technical hotspot in current marine science. The study of cold seep activities has improved people's understanding and utilization of deep sea resources. Submarine cold seeps are widely developed on the seabed of active and passive contine...

Claims

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Application Information

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IPC IPC(8): G01S15/89
CPCG01S15/89
Inventor 栾锡武余翼秘丛永刘嘉程
Owner QINGDAO INST OF MARINE GEOLOGY
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