Chapter 1473

Thanks to the fact that the face of the head of the headquarters is covered by the hat of the dustproof suit, otherwise the head of the headquarters may lose his chin.

Not only the head of the headquarters, but also other entourages. There is no way. The power of 17 MW is simply subverting people's imagination.

You should know that the main power consumption of navigation satellites is the core atomic clock in addition to the communication system responsible for contacting the ground. The reason for this is mainly determined by the physical characteristics of the atomic clock, because without an external force, it is impossible to make the atoms vibrate, and it is impossible to accurately define the time concept because of the frequency vibration, It is impossible to conduct high-precision navigation on the ground.

But if such a force is applied, the limited power on the satellite cannot be avoided.

Because of this, there are no more than two paths for countries around the world in the research and development of navigation satellites. One is to minimize the power consumption of the atomic clock. In this way, it can not only use most of the wechat power for communication and navigation with the ground, but also reduce the structural weight of the satellite, reduce the power burden of the satellite, and achieve the purpose of cost control.

The second is simple and crude, that is, using solar panels with larger deployment area and storage batteries, using launch vehicles with greater thrust, ignoring the structural weight of navigation satellites, and completing the actual deployment.

Although the first technology path has many advantages, it is too difficult. Let alone ordinary countries, science and technology is as strong as freedom and beauty. When deploying the first generation GPS satellite navigation system, the second technology path is also adopted, that is, the deployment is realized by using high thrust launch vehicles regardless of the weight of the satellite.

In the 1990s, with the progress of technology, the power consumption of atomic clocks used in the second and third generation GPS of freedom and beauty decreased, which emphasized cost control.

The problem is that there is only one free and beautiful room in the whole solar system, so there is only one solar system with low power consumption and low cost.

At the bottom of their hearts, Russians envy the low power consumption and low cost of freedom and beauty. The problem is that their national strength is limited, and they simply can't take resources to smash such time-consuming and labor-consuming projects. Therefore, the technical route of Russians is also the wildest, that is to make great efforts to perform miracles. Anyway, Russia has a lot of experience in aerospace. As long as they feel they can live, That's a good thing to use.

Europe has neither free and beautiful technology nor the old foundation of the Russians. What if it wants to build a low-cost and high-quality Galileo satellite navigation system?

Chicken thief Europeans have come up with another way, that is to improve the power conversion efficiency of solar panels. After all, in the 1990s, Europe's photovoltaic industry was unique in the world, which is the dependence of Europe on green and environmental protection at the turn of the century.

Since Europe has such a technological foundation, it will not leave it alone. Isn't it an advanced technology without an atomic clock? Isn't he a carrier rocket without a heavy load?

I'll just increase the power generation of the satellite!

Therefore, Europe has walked out of the third technical path, that is to improve the power conversion efficiency of solar cells.

Compared with the three giants, China has nothing to do. The key is that the overall budget of the navigation system is not much. Therefore, when all aspects are backward, the domestic navigation system has to advocate cost control like the free beauty room.

All kinds of factors add up to make the domestic navigation system just like the professional marathoners bound by countless shackles. Let alone accelerating, it's lucky to be able to run completely without killing yourself.

This is why when the head of the headquarters proposed to launch the second-generation satellite navigation system in April next year, many professionals and industry leaders were silent. The reason is that the technology is not mature, and there is no high-thrust rocket for high-load launch. The key is that the budget is still limited, which is equivalent to nothing. Even if the gods come down to earth, there is no way to make such a pot of cooked rice.

As a result, I came to the semiconductor manufacturing plant controlled by China Tengfei, but found that things that can't even be done by God have been made by China Tengfei. That's all. The key is that TM is delicious and TM is really fragrant!

You say angry or not!

However, the anger is still behind. Zhuang Jianye took out a set of vertical structure cavities for testing and said to the head of the headquarters and others: "what we use is a 793 nm laser as the excitation light source of rubidium and hydrogen atoms..."

"Wait... You also used this technology in the hydrogen atomic clock?" the head of the headquarters asked in surprise.

Zhuang Jianye nodded: "Yes, after all, the hydrogen atomic clock, as the most mature technical path among the atomic clocks today, is the best backup equipment for navigation satellites. In addition, the atomic excitation light source is universal in the atomic clock, so we applied the 793 nm laser vertical cavity of the rubidium atomic clock to the hydrogen atomic clock. Unexpectedly, we achieved better results than we expected, It not only greatly reduces the total structure of hydrogen atoms, from 90 kg in the past to 35 kg now. Due to the reduction of components, the cost is also reduced by 37%. The only drawback is that the power consumption is still a little higher. Our next direction is to reduce the power consumption of hydrogen atomic clock... "

Listening to Zhuang Jianye saying that their products also have shortcomings, the people present were relieved at last. Fortunately, the advantages and disadvantages. If everything is perfect, it will not be God?

So a leader of the headquarters asked subconsciously, "what is the power consumption of your hydrogen atomic clock?"

"I'm ashamed..." Zhuang Jianye was a little ashamed: "where for so many years, it can only be controlled at the level of 15 watts."

"I you m......"

As soon as this remark came out, the head office leader who asked directly jumped out without holding back a rude remark. Fortunately, reason defeated sensibility and shouted, "this TM is still called shame?" to Zhuang Jianye's neck.

Not only the leader of the headquarters, but also everyone present has an impulse to rush up and beat Zhuang Jianye. The power consumption of 35kg and 15W is already a very low level. You know, incandescent lamps weighing less than a kilogram need more than 20W. Is it more than 15W to drive a 35kg precision device?

Not much, but to a heinous extent, not to mention at home, but abroad, this is a proper first-class standard.

As a result, Zhuang Jianye said you were ashamed. Don't pretend to be 13, okay?

But Zhuang Jianye seemed really ashamed and explained to himself: "You should know that the total power consumption of our rubidium atomic clock is less than 1 watt. If it is through other technical paths, it is enough to achieve this level. The key is that the solid-state laser we use is a deep UV nonlinear optical crystal, that is, KBBF crystal, which is often called in the industry. This thing is our leading existence in the world. It should be able to achieve good results. The result is in the hydrogen atomic clock The effect did not meet our expectations, so that the expected navigation load was controlled within 100 kg. Now it seems that it can only be controlled at about 130 kg at most. For each additional kg of space launch, the launch cost will be more than 1 million yuan... "

Looking at Zhuang Jianye's melancholy face, a group of big men are messy in all kinds of wind