Ocean surveying and mapping equipment "guides the way" for manned submersibles

The "Struggle" has made a major breakthrough in my country's 10,000-meter manned deep dive, which is inseparable from the ocean sounding system independently designed and developed by my country. The marine surveying and mapping equipment research team of Shandong University of Science and Technology is responsible for key technical research on data collection, signal demodulation, beam forming, bottom detection and beam homing of the "Struggle" full-ocean near-bottom multi-beam bathymetry system. and real-time processing software development. The full-ocean deep near-bottom multi-beam bathymetry system works in conjunction with the bathymetric side-scan sonar of the Institute of Acoustics of the Chinese Academy of Sciences. By receiving the detection sound waves emitted by the bathymetric side-scan, it measures the seafloor topography directly below the submersible, creating a domestically produced equipment for ocean mapping depth. new record. These advanced technologies have completely independent intellectual property rights, breaking the long-standing technological blockade of some countries against my country in this field.

It is understood that the full-ocean deep and near-bottom multi-beam sounding system is usually mounted on various types of submersibles. It works when close to the seabed and is equivalent to the "smart eye" of the submersible looking down. Even when the water quality is turbid and visibility is poor, it can accurately measure underwater topography and detect underwater and water targets. It plays an important role in measuring abyss topography, sensing the marine environment and ensuring the safety of submersible navigation. In addition to being installed on the "Struggle" manned submersible, the full-ocean deep and near-bottom multi-beam bathymetry system has been successfully used in many major deep-sea projects such as deep-sea ARV.

The research team also participated in the research on the 11,000-meter deep water multi-beam sounding system led by the research team of the Institute of Acoustics, Chinese Academy of Sciences, and was responsible for the development of high-speed parallel optimization processing software for sonar signals and data synchronization acquisition software. This type of deepwater multi-beam sounding system is installed on the "Exploration 2" scientific research vessel. It adopts advanced technologies such as multi-strip emission, multi-pulse linear frequency modulation, real-time transmission beam attitude stabilization and near-field focusing. It is suitable for installation in professional surveying Ships can measure deep-sea terrain on a large scale and with high efficiency. Currently, only a few countries in the world, such as Norway, Germany and the United States, master the relevant technology.

In addition to participating in technical research on major national research projects such as the "Struggle" and "Exploration 2" scientific research vessels, over the years, the marine surveying and mapping equipment research team has also developed dual-frequency bathymetry A variety of ocean exploration equipment, such as instrument, shallow stratigraphic profiler, shallow water multi-beam echosounder, hybrid baseline hydroacoustic positioning system and Doppler flow profiler, solve the problem of acoustic transducers, high gain and low noise analog circuits, highKey technologies such as high-speed digital circuits, sonar signal processing and target detection, some technologies and products have been promoted industrially, breaking the monopoly of foreign products in the field of marine acoustic detection equipment, and achieving good social and economic benefits.

　(Original title: Ocean surveying and mapping equipment "guides the way" for manned submersibles)