Chapter 460: Not the best, but better than all of yours
Hearing this, Gao Zhendong burst out laughing, and the neighbors all around laughed, he deserved a beating!
And Gao Zhendong laughed so hard that tears came out. He remembered one of his past lives and became smaller.
That kid is similar to Banggan. When washing dishes, in order to use up the dishwashing liquid early so that he could use the dishwashing liquid bottle to have a water fight with his friends, he used it up in 3 days. A 500ml bottle of dish soap.
On the day he was discovered by his mother, Gao Zhendong heard a lot of people jumping around on the second floor. Gao Zhendong listened to a meal scene on the first floor.
After thinking about it, Gao Zhendong took out two pieces of candy, squatted down, and handed the candy to Banggeng, but Banggeng didn't dare to take it.
Qin Huairu said: "Mr. Gao, what are you doing?"
Gao Zhendong smiled and said: "These two pieces of candy are to reward you. You have taken good care of your two sisters. , let’s go on.”
Banggeng couldn’t resist the temptation, so he took it, and Gao Zhendong’s “but” came. As adults know, you have to listen to what comes after this sentence.
"But your method is wrong. Stealing the toothpaste at home is the first thing. Squeezing the toothpaste out and throwing it away is a waste. This is the second thing."
Banggeng was a little confused: "Uncle Gao, is it called stealing if I take my own toothpaste?"
Gao Zhendong nodded: "As long as it's not your own, it's stealing. Taking it without telling you is called stealing." "
"Uncle Gao, what does taking without telling me mean?"
Fuck, what the hell are you doing with a little kid?
“Just taking the thing without telling its owner is called stealing.”
"Oh, I understand."
"Then you said you were wrong?"
"Wrong."
Gao Zhendong nodded happily, yes , in place.
He stood up and pushed the stick in front of Qin Huairu.
"Sister-in-law Jia, you have to fight if you should. Keep going!"
Everyone was dumbfounded. Chief Engineer Gao, you are not acting according to common sense.
Only Lou Xiaoe laughed out loud, Zhendong was too naughty.
Unexpectedly, Gao Zhendong cheerfully gave me some thoughtful guidance: "By the way, just spank the butt. It's thick, not easy to cause problems, and it still hurts! It can improve your memory."
Qin Huairu was dumbfounded, but Gao Zhendong deceived Banggeng and said: "Mom, I know I was wrong, you go ahead. Don't hit your head. If you are beaten silly, I won't be able to take care of you when you grow up."
Qin Huairu weakly waved the feather duster a few times, but finally couldn't fight anymore, threw the feather duster away, hugged the stick and cried loudly.
Although she was crying, everyone knew that she should actually be happy because of her awesome words. Of course, there is also the sadness of losing a loved one.
Yi Zhonghai smiled and chased away the people: "Okay, okay, there's nothing to see anymore, I've beaten what needs to be beaten, haha, let's all disperse."
Everyone was happy. After watching a play, I felt satisfied and started to leave people one after another. This is what entertainment activities are all about these days.
Especially like today, the things are not big, the movement is not small, the plot is full of ups and downs, and there are no bad effects, it is enjoyable!
"It has to be Chief Engineer Gao. It's so interesting."
"Of course, he is the biggest official in the yard. It is not easy to deal with these things."
" Isn’t that Liu Haizhong in the backyard also an official? "
"What the hell, he is not as good as a seventh-level blacksmith."
"..."
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Everyone expressed their thoughts while walking, and Gao Zhendong was just about to turn around and go home when Qin Huairu stopped him: "General Engineer Gao, thank you!"
After saying that, Gao Zhendong bowed to Gao Zhendong. He waved his hands cheerfully: "You're welcome, you're welcome."
At the door of Jia's house, Banggeng gave one candy to Xiaodang, and placed the other one in front of Jia Zhenzhen. The tongue licks quite happily.
——
The first thing Gao Zhendong did when he went to work was to call Liu Rongguo over.
Comrade, the bismuth telluride matrix is left to you.
Looking at the document in his hand, Liu Rongguo did not complain. This thing did not look difficult.
After Liu Rongguo left, Gao Zhendong searched for a long time in the inventory of mercury cadmium telluride crystals sent by 1761, and got the five largest ones.
He specially reserved these big ones. The simplest way to solve the problem of consistency is to find the same source, so he kept the largest batch.
In order to give 1274 some practice first, Gao Zhendong also paired a batch of not-so-good ones to practice the craftsmanship first, and then sell good products when they are mature.
Gao Zhendong found the comrades in the confidential office of the No. 3 Factory and asked them to send these crystals to the Research Institute. Finally, these crystals came to the integrated circuit process test workshop of Factory 1274.
The factory is not surprised that the Guiding Research Institute has another batch of special components to be processed. This is a good thing, indicating that the Guiding Research Institute has many new and wonderful ideas. Want to achieve it.
But Gao Zhendong hid behind.
The specification requirements of this batch of components are much smaller than the components they make daily, but this is not a problem for comrades. Gao Zhendong has come up with various technologies including packaging and other processes to cooperate with integrated circuits. The supporting technology can exactly match the specifications of these pipes.
The only thing is that these diodes are required to be arranged in groups as straight as possible in a single row, and packaged into a long strip-shaped device, and the device packaging material is required to have as good insulation and thermal conductivity properties as possible. This can be said to make them slightly It was a bit difficult.
It’s not that it can’t be done, the main thing is that the words “as much as possible” make it very difficult to do, and it will never come to an end.
Especially for thermal conductivity, in the conventional packaging materials they have, if the insulation is good, the thermal conductivity is generally not very good.
But this is not the main contradiction. To put it bluntly, it is not impossible to seal it with a thin but well-insulated material, and then wrap it with a layer of good thermal conductivity material.
When discussing performance, size is always important.
It's like talking about toxicity without considering dose is like being a hooligan.
If the entire device is made into a piece, it is a bit like a long straight-edged knife. The diodes are on the blade, and the entire knife body is mainly composed of leads and thermal conductive materials.
For convenience and confidentiality, the people of Factory 1274 named this project "Pian'er Dao".
Gao Zhendong didn't know that his line array infrared sensor was at 1274, so it became a cold weapon for some reason. He was receiving comrades from the Telephone Office of the Institute of Communications.
The comrades encountered a small problem - there are a few small points in the relay that cannot be handled.
Originally, they thought it would be relatively simple to imitate and make their own products, since there was a sample basis after all. However, when performance and volume and weight requirements were superimposed, they suddenly discovered that things were not that simple.
These few small points are the contact points. Now the comrades at the telephone station are reporting the situation to Gao Zhendong.
“The main reason is that the service life is low. We have done preliminary research and put aside the requirement of remaining springs and only talked about the relay mechanism. If the number of switching times can be made up by strengthening the relay action mechanism, but the life of the contacts This is really a problem. In short, if the overall life span is to meet the standard, the entire relay will be a bit closer to the flat relay of Lao Maozi.”
The signal processing technology at this time is not good enough, so the signal and noise must be ensured. For example, the most common solution is to work hard, such as increasing the power or increasing the voltage.
The commonly used value for human body safety voltage is 36 volts. In fact, the more accurate value is safety current rather than safety voltage. However, if the same voltage is applied to different people, the current will not be consistent and is related to many conditions, so It is only approximated by 36 volts. In fact, in extreme cases, 36 volts is also unsafe.
The voltage used by telephones includes 60 volts, -48 volts, etc., which are all higher than the safe voltage of the human body. In those days, the generator of the hand-cranked telephone was able to trick people and catch fish because of its high voltage.
Let me make it clear that I am no longer interested in using that thing or similar techniques to catch fish. I really caught it.
With high voltage, arc ablation is more serious when the contacts are on and off, and the usual dynamic and static welding of the contacts also has a relatively large impact on the life of the relay.
Poor conductivity can withstand it, but good conductivity cannot. Circuits similar to soft start will bring other problems, such as complex structure, and it cannot solve the problem of welding failure.
Coupled with the quality of domestic materials at this time, it is almost impossible to say.
Comrades at the Telephone Research Institute have considered this more carefully. This is indeed a problem.
Gao Zhendong pondered: "Then if the problem of contact materials is solved, are you sure to make a qualified relay?"
Mr. Feng of the Institute of Communications and the comrades of the Telephone Research Institute were confused for a while. Turning a corner, Mr. Gao, a great talent, still understands this?
Thinking about where I am, I remember that metallurgy and materials seem to be Mr. Gao’s main business, right?
Think about the place where you came to hold the meeting, the No. 3 Steel Rolling Plant of the 17th Machinery Department!
Leader of the 12th Ministry of Machinery: Who the hell knows that the comrade in charge of allocating college students last year took the wrong medicine.
Looking at the topic that Chief Engineer Gao was discussing with himself, and then looking at his work unit, all the comrades in the Institute of Communications inevitably fell into confusion and absurdity.
Mr. Feng recovered quickly after the storm. He raised his head and looked at the comrades in the telephone research institute and urged: "Why don't you speak? Mr. Gao asked you, do you want to solve the problem?"
< br>"Ah ah ah, yes, yes. Mr. Gao, if we can solve the contact problem, we are still confident to make a qualified relay. It may not be a residual spring relay, but an ordinary one will be fine."
< br>You must know that electronic switches are not very reliable in this era. If the problem of relay contacts can be solved, it would be great. Use relays first, and then consider electronic switches later.
Only then did Mr. Feng nod with satisfaction. This is so reasonable. Look at the way you looked like you have never seen the world just now.
Gao Zhendong smiled and said: "That's a coincidence, maybe I can help you."
After saying that, he walked to the desk and made a phone call.
"Bring a piece of each of the samples labeled 6007 and 6013 from the sample library, yes. yes. Send them to my office."
These two types are now even abbreviated by him The hidden material is not the best for relay contacts, but it is undoubtedly much better than what the Communications Institute has access to now.
Well, the best kind is not cheap, and it is not very versatile, so there is no need to do it, it is a waste of time.
(End of this chapter)