The United States has the world's most advanced naval forces, and 11 nuclear-powered aircraft carriers have contributed a lot, and they are hiding in the blind spot of detection, and even ordinary radars may not be able to detect them, but our scientists can successfully detect them.
How can he spot the US aircraft carrier that is hiding in the blind spot of detection? What is the significance of this for China's coastal defense?
Countries that participated in World War I have discovered that the superiority of their air forces over their lands is overwhelming, and they are committed to developing a strong air force.
In order to be able to detect enemy air forces as soon as possible, world powers are working on advanced radar systems.
However, the range that the radar system can detect is only one plane, but the flight path of the fighter cannot stay on only one plane, which makes the radar system have a lot of blind spots.
Countries such as the United Kingdom and the United States have long discovered this problem and have begun to research radar systems with a larger detection range and stronger sensitivity, but their research has not been able to make a major breakthrough.
When Chinese researchers were researching radar, the United States and other countries had been conducting research in related fields for decades, and they once thought that projects that could not be completed by the United States and other countries would be difficult for our country to complete.
However, the emergence of Chinese scientist Liu Yongtan completely broke this situation, and he took the lead in putting forward the idea of improving the flexibility of radar in China, preparing to let the bulky radar move continuously with the target, so as to improve the accuracy of radar detection.
As soon as Liu Yongtan put forward this point of view, he was questioned by relevant researchers, who believed that research should be done in a down-to-earth manner, and the research ideas proposed by Liu Yongtan were a bit unrealistic.
Liu Yongtan doesn't think so, which has a lot to do with his early experience.
Soon after he was born, Japan launched the Nanjing Great, and he witnessed the Chinese land under the bombing of the Japanese army since he was a child.
Liu Yongtan's parents are intellectuals, and while they impart knowledge to Liu Yongtan, they just want him to be safe and sound, and they don't have too many requirements for his personal development.
However, Liu Yongtan believes that it is necessary for him to use what he has learned to ensure the security of the motherland, especially China's coastline and territorial waters.
This is because when Japan invaded our country, it came to our country across the ocean and caused harm to our people.
Liu Yongtan was admitted to Harbin Institute of Technology for his ideals, and studied radar and radio related knowledge in school.
Liu Yongtan later went to the United Kingdom for further study, where he came up with research results on civilian radar, which were recognized by the world's top radar experts.
Local researchers urged Liu Yongtan to stay in the UK, where he needed the resources, the space, and the latest research materials to refer to.
However, Liu Yongtan chose to return to China as soon as he finished his studies in the UK, and at this time he returned to his homeland and proposed a research plan that shocked Chinese researchers, but the progress of this plan was very difficult.
The detection range of ordinary radar is only about 40 kilometers, and within this limited detection range, it is inevitably affected by sea surface fluctuations, and the detection accuracy is greatly reduced.
With such technical support, after the enemy navy enters China's territorial waters, it may not be detected by China's radar, and Liu Yongtan put forward the idea of eliminating the blind spot of radar vision when he returns to China.
In order to prove the need to study high-quality radar, he worked for several months and wrote a 200,000-word report, and any data on the report was the latest data that he had repeatedly confirmed.
This200,000 wordsAfter the report came out, Liu Yongtan still had a half-meter-high scrap manuscript in his hand.
Liu Yongtan quickly relied on his own strength to persuade relevant research units in China to carry out projects to improve the accuracy of China's radar detection in one fell swoopFrom 40 km to 100 km
Once the research results came out, China's radar technology has been at the world's advanced level.
In order to protect the radar research project, China has set up the research site in a sparsely populated place, where the natural environment is harsh and the equipment used in the research is very limited.
The young people around Liu Yongtan think that foreign researchers use the most advanced equipment and have more information to refer to than them, so the radar they have studied still has blind spots, which is a little discouraged.
Liu Yongtan encouraged the young people around him, saying that there is no difficult research work in the world, and the more difficult the research, the more meaningful.
Under the encouragement of Liu Yongtan, the staff carried out research projects, and after they achieved a technological breakthrough, they applied this technology to our first system, and they have been able to detect aircraft carriers on the sea surface.
Even U.S. aircraft carriers are being detected by China's most advanced radar, but Liu Yongtan believes that they also need to make the radar detect all day long, so that the detection results can be more accurate.
In 1997, the same year that the US F-22 fighter flew test, China set up a radar research project and vigorously supported the research of Liu Yongtan and others.
In 2018, Liu Yongtan and others have been able to study the most advanced radar through research in the field of high-frequency ionization dynamic modeling, so that radar can truly become a "clairvoyant", and Liu Yongtan has won the highest national science and technology award for two consecutive times.
Liu Yongtan soon received widespread attention from **, and in the face of **'s inquiry, he bluntly said that he was just an ordinary teacher, nothing special.
He believes that his ability and time are limited, and he wants to train more relevant talents for the motherland, so that China's radar technology can continue to make technological breakthroughs.
In order to help the students with radar research, he decisively took his own8 million bonusSet up ** in Harbin Institute of Technology to support them in purchasing equipment and materials.
Now in his 80s, Liu Yongtan is still working hard in front-line research work, working more than ten hours a day.
But in the 90s of the last century, after the radar led by Liu Yongtan and his team found the target, he was already at the age of retirement.
Liu Yongtan, like his lover Ms. Feng Bingrui, is committed to cultivating talents for Harbin Institute of Technology.
Both of them were thrifty throughout their lives, usually walking or biking out of the house, using the money they had to buy materials for their research.
However, as Liu Yongtan and his wife got older, it was not safe to ride bicycles, so they tried to take public transportation as much as possible, and went to work with young people rain or shine.
In winter, Liu Yongtan also led the team to debug radar equipment in Weihai, Shandong Province and other places, where the weather was cold, but he was not affected by the environment at all and devoted himself to his work.
Liu Yongtan has always believed that it is particularly important to improve the long-range early warning function of radar, so he led the team to study the area6000 square metersallows the radar to detect distant targets.
The research results of Liu Yongtan's team have made it possible for targets far outside China's territorial waters to be detected by China's radar in advance, including US aircraft carriers and aircraft carriersf-22Stealth fighters.
This is a fighter whose stealth technology is second to none in the world, and China's fighter research has also used the F-22 as a reference.
The F-22 uses advanced stealth technology, so that the signal emitted by the flying fighter is only the size of a bird, which minimizes the possibility of being detected by radar.
However, China's most advanced underwater terahertz detection device, which can assist the radar system, discovered its whereabouts just after the F-22 took off, and China is preparing to apply this device to the military field.
Liu Yongtan and others have also developed a detection device in Haiti, so that China's radar can detect the situation in the territorial sea more quickly and respond to special situations in the shortest possible time.
But these research results have come out one after another, and they are inseparable from the hard work of researchers such as Liu Yongtan.
Liu Yongtan knows very well that civilian ships, radios, and other equipment can emit signals just like military equipment, and once the radar system cannot distinguish these signals, it will be a very troublesome thing.
He and his researchers studied the wavelengths and frequencies emitted by different devices, and also combined the performance of radars in different weather conditions to fill the loopholes that may occur when radars work for a long time.
In this way, Liu Yongtan went abroad to study when he was not confused, and returned to China as soon as possible after completing his studies.
When Liu Yongtan decided to return to China, there was a blank in domestic radar research, and he and his researchers could only continue to develop China's radar industry through their own experiments step by step.
He once talked about the reason why he did not stay in the UK to develop, saying that no matter how well he did in the UK, he was working for others, but only when he returned to his homeland to do research did he feel that he was helping his family.
In the face of the affirmation of ** and the outside world, Liu Yongtan never mentioned the process of his hard work, but only said that he was born in a great country and caught up with a good era, so that he could realize the ideals of his youth.
On January 8, 2024, Liu Yongtan received the lecture and certificate at the Great Hall of the People in Beijing with his scientific research achievements, which are all affirmations of his work by the state.
It is precisely because of such scientists that our country has been able to develop to this day, and they have brought our engineering field to one step after another with their strength.
When China built the atomic bomb, Kennedy, the 35th member of the United States, proposed that China could not build an atomic bomb, but researchers such as Qian Sanqiang still made China's atomic bomb successful in Lop Nur, Xinjiang in 1964.
When China built a hydrogen bomb, all countries in the world were studying this huge lethality, and the principle and raw materials for making a hydrogen bomb had been studied.
However, Chinese scientist Yu Min did not cross the river by touching the foreign research results, and proposed a new hydrogen bomb configuration, which made China's hydrogen bomb raw materials more convenient, more powerful, and less costly for follow-up maintenance.
All of this has been done independently by our country, including the advent of our nuclear submarines, which is inseparable from the efforts of our researchers.
Chinese researchers Huang Xuhua and Peng Shilu have all participated in the research of nuclear submarines, and Huang Xuhua and other Chinese researchers have also gone to the Soviet Union to learn nuclear submarine technology.
Huang Xuhua originally wanted to take the opportunity to study hard and help China build a nuclear submarine as soon as possible after completing his studies, but Soviet experts had reservations about him, and he could only rely on independent research with other researchers after returning to China.
In 1970, China's first independently researched nuclear submarine was successfully launched, allowing China to build a strong navy to help.
Now Liu Yongtan has made a new wish and is ready to continue to lead the team to research the best radar, while enhancing the flexibility and portability of the radar, reducing the manufacturing cost of the radar and better defending China's territorial waters.
References
Science Network - Liu Yongtan: Use radar to build the Great Wall of coastal defense.China News Network - Academician Liu Yongtan, the caster of the "Great Wall of Haiphong", won the highest national science and technology award.
Guangming**—Academician Liu Yongtan: All 8 million yuan bonus was donated.
Science and technology**—Academician Liu Yongtan: Build a "Great Wall of Coastal Defense" to protect thousands of miles of sea frontier.
Heilongjiang**—Liu Yongtan: "From 0 to 1", creating "sharp eyes" for Haijiang radar
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