Chapter 410: Chief Engineer Gao, we are so ashamed!
This made Qin Huairu burst into tears. After his man left, none of the neighbors in the yard, except for a few, left his orphans and widowers alone.
Seeing Qin Huairu's expression about to cry, Silly Zhu couldn't sit still: "Sister Qin, don't be like this, this is a happy event, look at how hard you are crying. The Zhendong family does not lack these, you Just accept it for the child."
Gao Zhendong glanced at Silly Zhu with a half-smile, this kid.
After sending Qin Huairu away, Gao Zhendong and his wife had another meal with Sha Zhu. They had just packed their things in the morning and did not cook.
——
While finishing the operating system, Gao Zhendong was waiting for Lou Xiao'e to start school on September 12th, but another group of people arrived first.
Two comrades from the original research institute came to him with a letter of introduction for the vehicle from the National Defense Work Committee.
The moment they met Gao Zhendong, the two comrades were quite excited to "see a real person". Although they were a little older than Gao Zhendong, they still called them "Teacher Gao" very humbly.
This troubled Gao Zhendong, and he quickly said: "Two comrades, you can call me Gao Zhendong or Comrade Gao, but if that doesn't work, you can call me Chief Engineer Gao. I can't bear the word 'teacher'."
He knows his own family affairs, and when it comes to lasers, he, as a "teacher", is probably not quite qualified.
The two comrades did not listen to him: "Teacher Gao, you are wrong. A pioneer is a pioneer. This cannot be faked. Even if you no longer engage in this profession, this We still need to be polite."
A few people argued for a long time, but Gao Zhendong finally won. If you want to call me teacher, then listen to the teacher and call me my job title.
The two sides talked for a long time before Gao Zhendong asked about their purpose.
The two of them came here for nothing else but one thing, the laser gyroscope.
Gao Zhendong thought that laser gyroscopes would be developed over there in the desert. After listening to them talking about it, he thought it made sense. If they did everything themselves in the desert, they would not do anything at all. Even if the people there were covered in Iron, you can't even drive a few nails into it.
In fact, Gao Zhendong only knew so much about laser gyroscopes so far. The two of them looked like they were asking for advice humbly, which made him feel a little unsure.
But he is not afraid, he has food in his hands, and he is not panicked.
After four consecutive rounds at the beginning of July, there were 5 chances left, and now there are 8 more chances. One of them was used to draw "The Barefoot Doctor's Manual", so there are still 12 chances in hand. Mo Panic first.
I didn’t read many books in my previous life, but I saved a lot.
"What do you want to ask? Regarding the principle, I should have told the comrade who came last time. As for the specifics, you have to ask me to know whether I can answer it."
The comrades from the original research institute didn’t know who the comrade who came last time was, and Gao Zhendong didn’t say anything either.
However, they were already prepared for Gao Zhendong's words. As emerging professionals in the laser field, they had made a lot of preparations to meet Gao Zhendong.
"Mr. Gao, after some preliminary theoretical calculations, we found that in terms of principle accuracy, optical interference measurement of optical path difference is difficult to achieve the accuracy you mentioned, although the calculated theoretical accuracy can also be used , but it is very far from what you said, that is to say, it is stuck at the first step."
This first question shows these two comrades, and that is true. Professional. In front of Gao Zhendong, they may be a little timid when it comes to lasers, but their foundation in optics is indeed solid.
As the two comrades talked, they handed their calculation process to Gao Zhendong, as if they wanted to ask him for corrections.
With this calculation process in mind, Gao Zhendong is no longer prepared to save the number of draws.
System, search for me!
The results were just as he expected. The results of the battle with netizens back then were still very fruitful. A professional textbook on laser gyroscopes published in the 1980s appeared in his storage, and it was published by Wudaokou.
After spending it 4 times, he didn’t care about the remaining one. After all, he was going to use part of it right away and write it in my handwriting!
Looking at the pile of manuscripts in his own handwriting in the storage library, Gao Zhendong was quite proud.
The two comrades from the original research institute looked at Gao Zhendong carefully looking through his calculation manuscript, feeling uneasy. The founder personally guided him, and they didn't know how they would do on this first paper.
They thought Gao Zhendong was reading his manuscript, because Gao Zhendong exchanged a few words with them while reading.
In fact, Gao Zhendong was reading a book on laser gyroscopes in the storage library. It was not unusual for him to do two things at once.
There is a lot of content in the book and it is very professional. Fortunately, Gao Zhendong’s brain has been systematically strengthened. I will not say that I can fully understand it in a short time, but it is probably no problem to read it.
After working like this for a while, Gao Zhendong found the problem.
These two comrades are indeed the professional and technical backbone of the original research institute, and there is no problem with their calculations. The reason for this result is that when they originally proposed the principle, the source of information was in their heads such as Encyclopedia. Non-professional information sources such as technology are just a scratch, and it is normal for non-professional information sources to have some problems. For example, this time, the problem is that interferometric measurement of optical path difference is the simplest method, but it is not the most accurate method.
These non-professional sources give full play to the charm of journalism. When talking about technology, they talk about the simplest kind. When talking about accuracy, they graft another The highest precision of technology.
It belongs to Zhang Guanli to wear it.
Encyclopedia misled me! Weiji is cheating!
It will be easier to solve the problem once it is found, and it will not be a problem to get it back.
Professional books versus bad sources, I have the advantage!
Gao Zhendong withdrew his thoughts from the storage and closed the other party's manuscript.
The two comrades knew that this was a conclusion and stared at him with curious eyes.
"Well, there is nothing wrong with your calculations. Interference cannot achieve that accuracy."
The optical interference method to measure the optical path difference requires a relatively large optical loop to obtain a large enough optical path difference so that The light interference fringes move significantly, which is difficult to achieve in a practical gyroscope with limited volume. This is why the Sagnac effect has been discovered long ago, but no optical gyroscope has been practical.
With the emergence of laser, its characteristics have made some changes in this matter, but the accuracy still cannot be improved to a very high level.
As soon as these words came out, the two of them felt cold. It was not impossible to use, but the accuracy was so different, which would undoubtedly greatly limit its range of use.
But Gao Zhendong’s next words brought them back to life.
"To achieve that accuracy, it is impossible to use interferometry. We need to change the method to oscillate the laser and measure the oscillation frequency difference between the forward and reverse oscillation lasers. This is also a way to measure the optical path difference. "
When the two heard this, they suddenly remembered that in the initial principle materials given to them by the National Defense Work Committee, there was a sentence from Chief Engineer Gao, to the effect that interference measurement is just a method of measuring optical path difference. , don’t be shackled by the method he gave.
It is estimated that optical interference measurement is just the simplest and easiest to understand method that Chief Engineer Gao casually mentioned at that time. It was to take care of the people who listened to his explanation at that time. The comrade was most likely not a professional in this field. Of course, Chief Engineer Gao must choose the easiest to understand example.
As for professionals like the two of us, what they say will definitely be more in-depth. Take a look at the latter method, which is much more professional. What is an oscillation laser?
Thinking of this, the two of them were very ashamed and their faces turned red.
Mr. Gao has long reminded this matter in and out of words, but the two of them can only wait, rely on, and want. They lie in the circle given by others and do things comfortably. If they leave the circle drawn by others, they will be blind. , there is no subjective initiative of scientific and technological workers at all, and in the end, Chief Engineer Gao has to remind and explain.
"General Engineer Gao, this is because we did not think carefully enough. I am very ashamed. Can you explain to us what oscillating laser means?"
In front of the originator of lasers , they had nothing to be embarrassed about and just asked.
Ahem, you don’t have to be ashamed, but it’s true that I’m a little sorry for you.
Gao Zhendong felt a little guilty and said with a smile: "I will give you some materials about the oscillation laser later, and you will know it after you learn it. As for the advantage of this technology, it is that its output is For pulse signals, it is difficult for the sensor to observe changes in interference fringes, but counting pulses is easy.”
Although the two people from the original research institute are not professional in electronics, they still have the basic concepts. Counting pulses is so simple!
“I have done some theoretical calculations and used the Sagnac effect to measure the rotation angle and speed. Compared with interferometry, the accuracy of oscillating laser can be 5 orders of magnitude higher under current technical conditions.”
Why is it because of the current technical conditions? The main reason is that there is another technology that can work wonders - fiber optic gyroscope, but there are no conditions for that at the moment.
These words almost made the two people at the original research institute think that Gao Zhendong was confused or that they heard wrongly.
"Five orders of magnitude? Not 5 times?" The comrade from the original research institute confirmed it again with a shocked tone.
"Order of magnitude!" Gao Zhendong repeated it very clearly.
There will be no problem. Chief Engineer Gao cannot joke about this kind of thing. The eyes of the comrades from the original research institute were shining: "General Engineer Gao, can you give us your calculation manuscript to study? It's not that I don't believe you, it's mainly because we have never been exposed to the theory in this area and want to learn more." "
Gao Zhendong nodded: "Well, after proposing this principle last time, I guess I can carry out in-depth research, so I took the time to do some related theoretical research this time. I won’t discuss the specific technical implementation for now. I’ll show you my research first and share it with you. After you finish reading, we’ll talk about the rest, okay?”
(End of this chapter)