Siheyuan: I eat melons while doing scientific research

Chapter 1184 Is there such a thing? Is there such a thing?

Even if there were no acoustic homing torpedoes, dropping a few more depth charges would be very dangerous.

The key is that once discovered, it means being followed, which is very dangerous for a submarine.

"This means that as long as anti-submarine aircraft can search in the air at 100 to 200 meters, they can effectively detect the current submarine. However, this search is in a strip shape, which is sometimes not as good as the circular sonar buoy. And when the magnetic anomaly detector finds the target, if you want to use guided weapons to carry out precise attacks, it is better to have a sonar buoy for precise or long-term tracking."

If the previous words were just emphasizing the importance of the two technologies, then his next words made the anti-submarine comrades overjoyed: "We have some basic knowledge of sonar buoys. I haven't thought too much about the basics, but since I proposed the magnetic anomaly detector last time, I have conducted some theoretical research on this equipment. The data I just mentioned are the results of this research. Of course, I have also obtained some other ideas. Comrades working on magnetic anomaly detectors can also come and talk to me if they need them."

The leaders of the Defense Work Committee sighed in their hearts that it was Comrade Gao Zhendong who had to do the research. Although there had been no push forward since he proposed the magnetic anomaly detector last time, he did not sit back and relax. Instead, he had full confidence in his own ideas and methods and started research on his own before the equipment was officially put into use.

As the saying goes, food and supplies must be sent before troops move out. He alone took the lead and opened a path for his comrades.

As for the possibility that what Gao Zhendong researched is useless, it's not impossible, but neither the National Defense Committee nor the Navy thinks that this is possible to happen to Gao Zhendong.

"Okay, regarding this matter, we will organize people right away and come to you for advice." The leader of the Defense Work Committee did not mention the words "exchange", Gao Zhendong himself said this out of modesty, but the leader knew the truth.

"We agree! By the way, Comrade Zhendong, you just said that in addition to these two methods, there are many new non-contact submarine search methods that have theoretical promise, right?"

Gao Zhendong nodded: "Yes, in fact, the best wide-area submarine search platform should be satellites. Using satellites to detect submarines has the advantages of wide range, fast update, and long sustainable monitoring time, but it is relatively difficult, so it can only be included in the preliminary research, and it is really impossible to do it in a short time. This platform can only be considered after the comprehensive capabilities are improved. And to some extent, satellite anti-submarine is not the most urgent. Satellites need to do too many things, and anti-submarine is not even on the list."

The leader of the Defense Work Committee nodded as he listened. This is the good thing about Comrade Zhendong. He has clear ideas and will not force high technology just for the sake of it. He knows how to weigh the pros and cons, economic feasibility, development status, priority level and other factors. He never gets carried away, and his decisions and suggestions are always relatively scientific and reasonable.

However, the anti-submarine comrades heard a clue in Gao Zhendong's words: "Chief Engineer Gao, you are talking about the anti-submarine platform. Does that mean that the anti-submarine technology carried by the platform actually has many possibilities?"

Gao Zhendong nodded: "That's right. In fact, if you want to search for submarines, there are several very promising technologies. Please note that these technologies are not just for anti-submarine purposes, including magnetic anomaly detectors. They can be used for anti-submarine purposes, but they are not limited to anti-submarine purposes. For example, magnetic anomaly detectors can actually be used for mineral exploration."

His simple words opened up the minds of his comrades.

The leader of the Defense Work Committee and the chief engineer looked at each other. This was Comrade Gao Zhendong's habit. It was not easy for him to see technology with too single use unless it was very important.

"Okay, let's get back to the point. If you want to quickly and non-contactly detect submarines over a wide area, you can actually use the wake."

"Wake? The wake of a submarine is hardly visible unless it is sailing on the surface." The comrades thought this was nonsense. The wake of a submarine is integrated with the sea water. How could it be seen from an airplane or even a satellite from such a long distance?
Gao Zhendong shook his head: "No, no, no, there are many kinds of submarine wakes. In fact, they are very obvious features. They are just not so easy to see, which does not mean they are invisible. The easiest to understand and most common wake is the wake. Although it is not obvious to the naked eye because the submarine is sailing in the water, it actually causes ripples on the sea surface. The length of this change can reach more than 20 kilometers and can last for more than 1 hour. When the sea conditions are not high, this is a good submarine search signal."

As for other wakes, Gao Zhendong either classified them into other schemes, such as magnetic wakes, or they are of little significance for the time being, and Gao Zhendong did not say.

But the wake on the sea is so big that it is really useful, but...

"But we can't see this thing from an airplane, right? Not to mention a satellite."

Gao Zhendong smiled and said, "Yes, it's not easy, but it doesn't mean there is no way. There is a kind of radar that can see clearly, and this kind of radar is very useful, not just in this place. Of course, it is also very difficult."

Radar? Radar can see this kind of fluctuation? That means the radar must be able to depict an image of a large area, and even this image is not a simple flat photo, but a three-dimensional stereo image.

If there really is a radar that can achieve this effect, then it has more than just anti-submarine use. It can even be said that using this thing for anti-submarine purposes is a waste of talent.

But does such radar really exist?

There are basically no comrades here who specialize in radar and know nothing about this.

The leaders of the Defense Work Committee stepped forward in time. Since these comrades were not engaged in this, there was no need to tell them about this news. "Okay, okay, no matter how difficult it is, I will ask the comrades who are engaged in radar to come to you later." For the Defense Work Committee and the Navy, it was enough to know that Gao Zhendong had a new idea. They knew very well that Gao Zhendong was also the best in the country in terms of radar, and he was particularly good at specific devices and special algorithms, as well as extremely novel ideas.

Good stuff, good stuff... Although this thing has not been revealed yet, the little that Gao Zhendong revealed is enough to make people imagine. It sounds like the plane can measure the terrain on the ground with a high accuracy after flying a circle? A reconnaissance weapon!

This first achievement made the comrades even more curious about the anti-submarine methods in Gao Zhendong's mind.

"What other means do you have?" The naval comrades could not hold back at all.

"In fact, there is another one that is more readily available, infrared thermal imaging!"

"Thermal imaging?" It's so cold underwater, what use is thermal imaging? It's just a drop of water in the ocean.

Gao Zhendong smiled and said, "Yes, thermal imaging. Submarines need to dissipate heat. Whether it is an internal combustion engine or a special fuel, their efficiency is limited. The excess energy is almost always dissipated in the form of heat, and the greater the power, the more heat needs to be dissipated. This situation is more obvious on special fuel submarines because they have high power and cannot be shut down."

Special fuel submarine. It was difficult for Comrade Gao Zhendong, who clearly knew everything, to pretend that he knew nothing and just come up with a name. The leaders of the navy almost laughed out loud.

Well, special fuel submarines are more obvious, so that’s good, we want to catch the ones using special fuels.

"The heat emitted by the submarine underwater is enough to cause the surrounding seawater to produce temperature changes that are large enough for thermal imagers to distinguish, forming a thermal wake on the sea. The advantage of this method is that the technology is ready-made and relatively intuitive, and it can be carried by many platforms. Of course, there are also disadvantages. The submarine cannot be too deep, but a few dozen meters is okay, and it is greatly affected by the weather."

The mercury cadmium telluride thermal imager made by Gao Zhendong has low resolution and slightly poor consistency, but its sensitivity is not low. As long as some targeted improvements are made and the submarine dives shallowly enough, it can still play a certain role.

Comrades think this thing is good. The key is that this thing must be carried on anti-submarine patrol aircraft. It is a way of killing two birds with one stone. It is also good to have one more means.

"Okay, we'll study this later and make targeted improvements to the thermal imager." The comrades working on anti-submarine equipment were eager to get started. There was no need to bother Chief Engineer Gao with this matter. It would be better to leave his time for other comrades in need with such small matters.

"In addition to this, there is another reconnaissance method that can be barely classified as an optical method. However, this thing is quite special. It combines theory with practice. It can detect submarines about 70 meters underwater, but the technology is very difficult. Moreover, it may be more suitable for underwater communications."

Underwater communication? Comrades' ears are all perked up, itching!
As we all know, the only way for submarines to communicate underwater, apart from the incredibly slow long-wave radio, is to throw out communication buoy antennas.

Lao Maozi: Hmm? Why are my ears a little hot? Do you want to sneeze?
But comrades really can't think of any optical means to achieve this effect.

"What optical means?"

Gao Zhendong smiled and said, "Laser!"

Laser?! No wonder.

Anyone who works in optics would know that this smiling young man in front of him has another identity.

"Laser? The propagation characteristics of laser in water are not very good, right?" Some comrades have done some research on this.

Gao Zhendong nodded: "Yes, but some lasers are still good and can complete this task, such as..."

This time, the Navy leader was quicker than the Defense Work Committee and coughed heavily. “Let’s talk about it later. Let’s talk about it later. This thing is quite interesting. Hahahaha.”

However, Gao Zhendong knew very well that this thing would not be able to take off in a short period of time. What he was doing now was nothing more than planting seeds.

(End of this chapter)