This car is comfortable to drive and has good off-road performance.

Yang Fan did not rush to get in the car, but threw the key to Li Zhengjun, "How about you drive?"

"Really!"

Li Zhengjun was surprised and did not expect that there would be such a good opportunity to drive Chief Yang's car. Looking at the entire Donghai Institute, which car is the best?

Undoubtedly, it is the imported large off-road vehicle in front of you.

Li Zhengjun has a driver's license, but he doesn't have his own car. He is a super rich man who can buy a car these days. If he doesn't have a car, he can only drive a car from the unit occasionally, and he will just enjoy it.

Holding the car key in his hand, Li Zhengjun still didn't believe it at all and said in surprise: "Chief Yang, is it really up to me to drive the car?"

Yang Fan nodded and said, "Yes, you can drive. Are there any problems?"

"No, no." Li Zhengjun opened the car door with a happy look on his face, sat in the driving position, and fastened his seat belt.

Yang Fan thought about it and sat in the passenger seat, mainly to see how Li Zhengjun's driving skills were. If his level was too poor, sitting in this position would be convenient for appropriate reminders.

Soon, Yang Fan felt relieved. Li Zhengjun was driving well, started smoothly, had a relatively skilled movement, and had a strong sense of safety. Whether it was starting or turning, he turned on the turn signal in advance and looked at the rearview mirror. Only when conditions permitted were allowed were allowed.

After reassuring, Yang Fan said, "I'll take a break first. If you are tired, then I'll drive it."

Li Zhengjun said: "Don't worry, rest, I have no problem."

From the East China Sea Institute to the onshore joint investigation experiment base, there are about 200 kilometers. In the past, due to poor road conditions, it took about five hours. The road conditions are much better now. There are more than 100 kilometers to take the newly built expressway, and only more than 100 kilometers are ordinary highways.

These ordinary roads have no mud or gravel roads, no longer bumpy, but are all cement or asphalt roads, and the road conditions are pretty good.

It was originally a five-hour drive, but Li Zhengjun only took three and a half hours to arrive. He arrived at the land joint communication base more than 200 kilometers away from the East China Sea Institute at around 12 noon.

Ten years ago, it was a desolate beach.

What about now?

This is a modern experimental base, surrounded by high walls, buildings inside, and there are soldiers with live ammunition standing guard at the gate.

Yang Fan is more familiar with the situation here.

Basically, I come here several times a year. After parking the car, Yang Fan waved and said, "Let's go and have a meal first."

After driving for so long, I was really hungry and a little tired. The two of them went to the base cafeteria to have lunch first, and happened to meet Pan Jinfu during the meal.

They arrived yesterday afternoon, one day earlier than Yang Fan. The two sides met in the cafeteria and were very happy.

Pan Jinfu said: "Comrade Yang Fan, you just arrived."

Yang Fan said: "I just arrived but not ten minutes."

The two chatted happily, the topic was related to the experimental base, and the focus was on the electromagnetic compatibility laboratory that had been built and was only waiting for expert acceptance.

Several other comrades from the East China Sea Institute, such as Kuang Wei, Liao Wenliang and others.

"Comrade Yang Fan, the electromagnetic compatibility laboratory is well built. We went to see it today and I am so happy that we finally have such a professional laboratory."

Pan Jinfu's words were filled with deep joy.

Looking back then, there was no professional electromagnetic compatibility laboratory at all, and even the detection methods and equipment were very behind. The electromagnetic interference problem of the 052 ship made everyone's heads big.

Now, the hardware conditions are much better. With a professional laboratory, the 054 ship will not follow the old path of the 052 ship, and will definitely not be like that in the electromagnetic interference area.

Kuang Wei said with admiration: "Chief Teacher Yang, during the design and demonstration of the electromagnetic compatibility laboratory, you put forward a lot of opinions and suggestions. It was designed and built almost according to your suggestions. You have the greatest contribution to our ability to have such a professional electromagnetic compatibility laboratory."

Yang Fan looked modest, "Where, I just made a little suggestion. The comrades who made the greatest contribution were the comrades in the construction laboratory."

Everyone was having lunch while chatting happily.

After dinner, Yang Fan took Li Zhengjun to the guesthouse at the test base. The environment was very good. It was a typical sea view room. Open the window and you could see the blue sea outside.

The guesthouse is not far from the experimental base, and is also on the beach. There are two buildings in front and back, with more than 100 rooms and conference rooms.

After a while, Yang Fan went to see the built electromagnetic compatibility laboratory.

The last time I went to the electromagnetic compatibility laboratory, it was two or three months ago. When I walked to the laboratory, I found that it had changed a lot. Some of the previously unfinished areas have been built and they look very gratifying.

Electromagnetic compatibility laboratory is a special type of laboratory established for electromagnetic compatibility tests. First, let’s explain the basic concept of electromagnetic compatibility: it refers to the ability of electromagnetic systems, subsystems to work normally in their respective electromagnetic environments without reducing their working performance due to electromagnetic interference.

The electromagnetic compatibility laboratory system here is relatively complete, and there will be no problem in conducting electromagnetic interference and electromagnetic compatibility tests for various ship-based equipment.

Not only is there an electric and dark wave room, but also a shield room.

The radio wave dark chamber is a place for radiation emission tests and radiation immunity tests. According to the test distance, it is divided into three-meter dark chambers and ten-meter dark chambers.

Here is the ten-meter magic dark room.

Yang Fan took Li Zhengjun into this ten-meter dark room. The lights inside were turned on, everything was clear, and its unique appearance felt quite beautiful.

The ground is filled with extremely bright metal plates, and the surroundings and ceilings are covered with wave absorbing materials. Standing in this large laboratory with an area of ​​hundreds of square meters, it seems to be good.

Li Zhengjun said: "Chief Yang, this is the ten-meter magic dark room, it looks very good."

He was born in the design of ship power system, and he only understood electromagnetic interference and electromagnetic compatibility, without in-depth research.

Yang Fan introduced: "This is the ten-meter method dark wave room we just built and is waiting for acceptance, which is part of the entire electromagnetic compatibility laboratory."

"The ten-meter dark room can be used to conduct electromagnetic compatibility tests such as radiation emission tests and radiation immunity tests, as well as shielding performance tests..."

In this regard, Yang Fan is a professional and briefly introduced to Li Zhengjun.

After looking at the ten-meter magic dark room, the two went to the shielded room to take a look.

The shielding chamber is a hexahedral metal room with splicing structure or welded structure. The shielding effect (se) reaches more than 90db in the frequency band 10khz~150khz and more than 110db in the frequency band 150khz~18ghz. It can meet the standard requirements and can conduct up to twenty electromagnetic compatibility tests.

After looking around, Yang Fan was very satisfied.

I thought to myself, we have a professional electromagnetic compatibility laboratory, and the first batch of ship-based equipment of the 054 ship is in place, and the electromagnetic compatibility test will be carried out here immediately.

For example, the various radars and electronic equipment that the ship 054 will be equipped with can be sent here for testing first, and then considered to be installed on the ship 054 during construction.

After visiting the electromagnetic compatibility laboratory, Yang Fan went to see the boat model towing test pool during construction.

We do not have large and professional tow pools in China. Last time, we could only go to Hamburg, Germany to do relevant experiments. Not only did we use some relationships and resources, but the fees were not cheap.

In modern ship design, pool towing tests are essential, especially ships that adopt a stealth design with a hull appearance. Such ships must undergo pool towing tests.

To achieve stealth from radar, modern warships mainly change the appearance of the warship and wrap weapons and various equipment in a polyhedral shell. Therefore, for warships with strong stealth functions, there is almost no vertical steel plate on the surface of the hull. This design sounds simple, but it also brings a series of difficult problems.

First, the larger area of ​​wind is affected, which will affect the performance of the entire ship. Second, our ship is simpler and the ship's antennas are concentrated, which brings about electromagnetic compatibility problems.

In order to solve the problem of electromagnetic compatibility, we already have an electromagnetic compatibility laboratory.

Due to the increase in wind area and the performance of the entire ship, it must be verified and tested through pool towing tests.

Warships with stealth functions in countries around the world all adopt geometric polyhedron shapes, but under the same power and load, which configuration can make warships run faster and more steadily?

This requires researchers to make a model of the hull and put it in the pool again and again for towing experiments to measure the resistance of the hull.

Under Yang Fan's suggestion, the construction of the first professional ship model tow test pool in China started, and is currently under intense construction.

Yang Fan saw Liao Wenliang.

This is normal, Yang Fan did not feel any surprises.

Last time I went to the Hamburg Pool for a boat model towing test, Yang Fan brought three people over, namely Li Jun, Liao Wenliang and Xue Bingyuan.

They have really seen boat model towing test pools. They recorded a lot of things at the beginning. After the construction of the first applied towing test pool in China started, Liao Wenliang often came here, and sometimes stayed for more than ten days.

Li Jun and Xue Bingyuan also often come here to provide technical support for the construction of the pool. Sometimes, the three of them would discuss some technical issues in the construction of the pool together.

"Chief Commander Yang!"

When Liao Wenliang saw Yang Fan coming, he was very happy and immediately took the initiative to say hello.

Yang Fan nodded gently and said loudly: "It seems that the construction here is progressing well. Take us a good look at it, how is it?"

I remember when I came here two or three months ago, construction just started not long ago. In the past two or three months, there have been a lot of changes.

Liao Wenliang said happily: "Chief Teacher Yang, you have chosen the right person. I basically spend most of my time here and have a very good understanding of the situation."

He took Yang Fan and Li Zhengjun to visit the towed test pool during construction and introduced the situation of the pool, such as the progress of the construction, what technical problems have been encountered, construction plans for the future, etc.

Here, in addition to the construction workers involved in the construction, there are also many engineering and technical personnel. Like Liao Wenliang, they are responsible for the technical work of pool construction.

Yang Fan unexpectedly discovered that these engineering and technical personnel always looked at themselves intentionally or unintentionally, and always looked at them quietly.

This is quite strange!

What's going on?

Even Li Zhengjun felt this and reminded softly: "Chief Yang, someone is quietly watching us."

......

Today's third update, the first update is here!
Chapter completed!