In December 2015, the 'Xiangyang Hong 10' ship will be equipped with the newly developed 4,500-meter-deep deep-sea resource exploration system 'Qianlong II' in China to conduct pilot applications and voyage survey in China's polymetallic sulphide exploration contract zone in the Southwest Indian Ocean Work from the second Institute of the State Oceanic Administration Professor Zhang Jinhui-level work as 'Qianlong II' project deputy chief engineer, exploration system development team leader 'Qianlong II' devoted a lot of effort recently, The reporter went to the Second Institute of Oceanography of the State Oceanic Administration in Hangzhou and conducted an exclusive interview with Zhang Jinhui.
Independent research and development AUV magnetometer to break the foreign technical barriers
In 2011, the State 863 Program set up a '4500-meter deep independent resource exploration system for the major projects of the 12th Five-Year Plan', and Zhang Jinhui is the person in charge of the project of "Exploration System for Exploration of Geological Exploration of 4500-Meter Deep Sea-Exploration System." The main research contents One of the developed deep sea AUV three-component magnetometer, used to detect near-end high-precision geomagnetic data, serving the investigation of polymetallic sulphide resources.Because the AUV three-component magnetometer can not only be used for scientific investigations, but also has military applications, is a high-tech Sensitive equipment, and our country has not yet had a precedent for the application of AUV magnetometer, foreign high-precision three-component magnetometer technology blockade, it is difficult to purchase from abroad, so to get the AUV near-bottom magnetic data, we must rely on independent research and development, to be solved Magnetometer of high precision, miniaturization, strong magnetic gradient adaptation and AUV magnetic interference correction and other technical issues.
Since the establishment of the research group, they have devoted a great deal of effort to the development of the AUV magnetometer. First, we must develop a three-component magnetometer with high precision, small size and high stability, and overcome the magnetic interference correction technology of the AUV magnetometer. Group uses a non-magnetic probe capsule, 24-bit high-precision A / D conversion, circuit integration and other small technology design, as small as each fixed screw must be tested non-magnetic materials, through a large number of measured and components stereotypes , To achieve the AUV magnetometer of high precision and miniaturization.Due to the presence of submerged iron, floating iron, battery compartment and electronic cabin and other magnetic substances on the "Qianlong II", causing serious magnetic interference to the magnetometer detection, Therefore, in order to obtain reliable and valuable AUV magnetic data, it is necessary to solve the technical problem of magnetic interference correction of magnetometer by AUV.The team read the foreign research data, combined with a large number of onshore, Lake test data, the use of 'AUV rotation parameter fitting method' to solve the magnetic interference AUV magnetometer correction in July and August this year, the South China Sea test, AUV magnetometer maximum working depth of up to 4500 meters, the sea trial process is normal.The detection data by the magnetic interference correction processing, the magnetic test results and the survey area of the international geomagnetic field query results, the sound quality of the detection results, the success of China's first AUV near-bottom magnetic detection. The reporter said that at present, China's independent research and development of AUV magnetometer work is very stable, reliable performance, not only can be carried in the 'submarine Dragon II' autonomous submarine, but also can be carried in 'dragon', 'sea horse' and other submarines . 'Now whether in terms of technology or materials, deep-sea AUV magnetometer to achieve mass production is no problem,' said Zhang Jinhui proudly.
'Qianlong II' set of light, sound, electricity and more sensor synchronization detection, fast data fusion output
In addition to the development of magnetometers, Zhang Jinhui led the research team of AUV detection system is also responsible for the configuration, maintenance and data of other detection sensors on the AUV. The "Qianlong II" set of geophysical, physical ocean, marine chemistry, optical and other detection technologies Processing and analysis of the Ocean 40 voyage, AUV detection system development task force responsible for ensuring the AUV detection equipment is working properly to ensure that the detection data quality and reliability in order to make the time synchronization of the detection equipment, 'Qianlong II' detection of detection equipment Data are transmitted to the AUV control center through the serial port to save the computer because of the detection equipment does not locate the probe information, the need to time information and 'Qianlong II' integrated navigation and positioning system to obtain the location data fusion, in order to ensure that the sea AUV exploration data management system and AUV multi-parameter exploration data processing system developed by the research team have been developed and applied well in the South China Sea sea trial. For more than 30 Small-scale long-range exploration of potential data, in 3 hours for rapid data fusion , Storage management and output preprocessing results, to provide a scientific basis for the next offshore operations.
Zhang Jinhui said that this oceanic expedition will travel to the southwest Indian Ocean. The maritime situation in this area is rather harsh and the seafloor topography is complex. This will be a real test for the 'Qianlong II' and its detection equipment. Through the successful experience of the South China Sea sea trial , Is still full of confidence and believes that AUV magnetometer will play an important role in hydrothermal sulfide mineral resources survey .Zhang Jinhui explained that hydrothermal sulfide mining area is divided into active and inactive, for the active hydrothermal sulfide , Hydrothermal anomalies can be detected by physical ocean and ocean chemistry sensors such as temperature and salinity sounders, multi-parameter water quality meters, and methane detectors, and these sensors can do nothing for inactive mine sites that are inactive, and can detect with an AUV magnetometer To its anomaly, AUV near-surface magnetic data also have important scientific significance for the study of the three-dimensional structure and the reserves of the polymetallic sulphide deposits.
In order to 'Qianlong II' chief designer touched tears AUV will be promising in marine surveys
When it comes to 'Qianlong II,' Zhang Jinhui is very proud. He described to a reporter who had not seen the true face of Qianlong II: 'It looks very beautiful and the fluid is flat. Like a fish, it has very good mobility and is specially designed for Southwest Indian Ocean seabed and complex terrain and design '.
He also revealed to us a secret: the South China Sea sea trial Sanya summing up meeting, 'Qian Long II' chief designer Liu Jian moved tears. 'The first five sub-tests conducted are not progressing well, Although we all know that the development of high-tech products will not always be easy, but personally encountered the case, the researchers are very worried about the failure of the sea test phase to the state spent so much money to invest in research and development of a device, if the final sea test results The failure is the result of no one wants to see, so everyone under pressure are quite big, Fortunately, Master Liu Jian fearless, steady, step by step to solve the problem, the final 'South China Sea Dragon King' may have been touched by our spirit , Behind the potential tests are very smooth, in the second long-range sub-test, the submarine have worked for more than 31 hours until the battery energy consumption to set the threshold value of the submarine before it is loaded on the floating iron and water, each Detection equipment work is normal, the sea test is very successful as a strong sense of responsibility Director Liu, the pressure during the entire sea trial is the largest, so will be in the South China Sea sea trial Sanya summary of the meeting at the meeting Liu Kin Thank division during sea trials superiors of care and understanding, co-operation and brothers participating research units closely cooperate in solving problems, and an important spiritual pillar of our difficulties to solve the problem ', Zhang Jinhui said.
'AUV can accomplish the tasks that the current conventional on-board and towed survey methods can not accomplish. The advantages of the AUV are the fine topographic survey with near-bottom and full-coverage, the geomagnetic survey with near-end precision, the three-dimensional distribution of hydrothermal plume and the near-end high-definition photos Shooting and so on, can provide scientists with high-precision marine exploration data to meet the needs of different scientific research.With the development of AUV technology, AUV reliability and application of technology to improve and reduce R & D costs, I believe in the near future will be more AUV Underwater at the same time mode of operation, which will greatly improve the AUV operating efficiency and survey costs, I believe the AUV in the ocean survey promising, will be Southwest Indian Ocean in China 10,000 square kilometers of polymetallic sulfide contract area play an important role in detailed investigation ', Zhang Jinhui confidence Said full.
