Three-dimensional scanning acoustic imaging device

Abstract

The invention discloses a three-dimensional scanning acoustic imaging device and belongs to the field of underwater engineering mapping, and particularly the three-dimensional scanning acoustic imaging device is composed of an underwater machine rotary table, an acoustic imaging unit and an auxiliary measuring device. An acoustic multi-beam ranging principle is adopted as the basic principle of the device, a transmitting transducer array transmits sound beams which are narrow in the horizontal direction and wide in the perpendicular direction to irradiate a detection area, the transmitting transducer array conducts beam forming processing on received multi-channel signals to form multiple receiving beams which are quite narrow in the perpendicular direction, the arriving time of the echo of each receiving beam is calculated, the position of a space target can be calculated according to the direction of the beams, one perpendicular scanning line of an underground scene can be obtained through each time of receiving and transmitting, 360-degree rotary scanning is conducted on the horizontal plane through the underwater machine rotary table, finally, a three-dimensional point cloud image of the specific underwater area is formed, and therefore a three-dimensional structure of the underwater scene is visually reflected. The device can be widely applied to multiple fields of underwater structural object detection, bridge underwater detection, ocean platform underwater safety monitoring and the like.

Description

Technical field [0001] The present invention relates to the fields of underwater engineering and underwater surveying and mapping. More specifically, it relates to a three-dimensional scanning acoustic imaging device, which is widely used in underwater structure detection, bridge underwater detection, marine platform underwater safety monitoring, etc. Areas. Background technique [0002] Large underwater structures, such as bridge piers, piers, ocean platforms, offshore buildings, etc., after a long period of time in the water, due to the erosion and erosion of water currents, a large number of safety hazards such as damage and deformation will occur. The traditional method uses divers to detect underwater structures. This method is extremely inefficient. At the same time, there are many hidden safety hazards for divers underwater operations. [0003] With the development of science and technology, more and more underwater inspections are performed using side scan sonar, multi-bea...

AI Technical Summary

Problems solved by technology

The traditional method uses divers to detect underwater structures. This method is extremely inefficient, and there are many safety hazards in underwater operations for divers.

[0003] With the development of science and technology, more and more underwater detection is carried out by side-scan sonar and multi-beam bathymetric sonar. However, side-scan sonar is mainly displayed in the form of images, and it is difficult to give a specific three-dimensional structure. Underwater search and rescue, pipeline detection and other applications that only use image information; although the multi-beam echo sounder can give the underwater three-dimensional structure, but the main purpose of the multi-beam echo sounder is underwater surveying and mapping, so it is difficult to analyze bridge piers, ocean Platforms and other structures perpendicular to the bottom of the water for three-dimensional imaging, especially near the water surface, the multi-beam echo sounder is basically unable to measure

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