Super broad coverage multiple beam bathymetric side scanning sonar device

Abstract

This invention provides a kind of over-square overlay multi-wave-packet sound side sonar equipment. It includes the water extension 1, underwater extension 2 and the cable 11 and 12 connects them; the water extension 1 is mainly an embedded integral control machine, combines the signal process system 6, the left signal collection and pre-process system 7, the right signal collection and pre-process system 8 and the left signal conditioning system 9, the right signal conditioning system 10; the underwater extension 2 is composed of the left acoustics warehouse 3 and right acoustics warehouse 4, the left acoustics warehouse 3 is the same with the right acoustics warehouse 4, they are set symmetrically. This invention can gets the over-square overlay underwater land form and physiognomy information , improves the ocean mapping effect and measure precision; it creates the result image such as the digital sound data and side image and so on, to make the system has the detection ability of microtopograghy and small target.

Description

(1) Technical field [0001] The invention relates to a measuring device, in particular to a sonar measuring device. (2) Background technology [0002] With the development of modern science and technology, people have obtained relatively fine topography and landforms of the land parts of the earth where humans live through space telemetry technology, and based on this, they have guided people to transform nature and develop various land resources to serve the development of human society. However, our understanding of the underwater topography that accounts for about 71% of the earth's surface and the underwater topography of a large number of rivers and lakes is far from what people expect. Underwater information needs the help of terrain and landform detection equipment. [0003] Foreign countries have been developing underwater terrain detection equipment since the middle of the last century. After decades of development and change, from the initial single-beam sounder, t...

AI Technical Summary

Problems solved by technology

[0004] The single-beam depth sounder transmits a single-beam detection ultrasonic wave directly below the surveying ship, and then receives the bottom scattered echo with a single-beam, and measures the depth of the water body by measuring the time difference between the transmitted and received signals, but cannot give geomorphic information

In order to avoid the influence of measuring the pitch and roll of the ship, a relatively wide single beam is usually required to be around ±10°, which leads to low measurement accuracy; and its fundamental defect is: only the water body directly below the measuring ship can be given each time Depth, in order to have a more comprehensive understanding of the water area information, the distance between the two survey lines must be greatly reduced by using a single beam to measure the water depth, which leads to a great waste of manpower and material resources

At present, there are two main defects in the performance of the existing multi-beam echo sounder: first, it can only obtain the terrain information of the bottom of the water, that is, it only has the sounding function, and cannot output the side scan for micro-topography and small target detection image; secondly, the adopted launch matrix formation cannot achieve ultra-wide coverage to achieve high-efficiency detection

From the perspective of system structure, they all integrate some circuits in the underwater extension, thereby reducing the scale of the water extension; from the perspective of the composition of the water extension, they do not adopt the design scheme of an integrated machine, and the scale of the water extension is relatively large. Therefore, the portability of the system is not strong; in terms of technical characteristics, in order to achieve ultra-wide coverage, the EM3002 adopts a Mill's cross array arranged in a "V" shape on both sides. The widening of the coverage fan weakens, resulting in low edge echo quality; Fansweep 30 uses a horseshoe array, which has the advantage of wide coverage, but the process is complicated and costly, which is not conducive to popularization

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