Otaku Engineer in Great Tang Dynasty

Remember in one second [End of the God Station] Mobile phone user input address: m.xinwanben.com

"Xiao Xuan, why did you abuse King Wei like this? If Your Majesty knew about it, how could he forgive you lightly?"

In the Tricky Pavilion workshop, after Li Zexuan solved the problem for Li Tai, he was pulled aside by Cheng Yaojin and complained in a low voice.

"This... Uncle Cheng, where did you start? Why did I abuse Qingque?"

When Li Zexuan heard the words, he was stunned for a while.

Cheng Yaojin thought that Li Zexuan was too embarrassed to admit it, so he curled his lips and said, "Hey! This is not considered abuse? When did this old man see King Wei in a clean and decent manner? Look at him now. , what's the difference between you and an ordinary craftsman in this workshop? If he didn't make a sound just now, the old man almost didn't recognize him! In the words of their literati, he is now unkempt and unrefined!"

In order to show that Li Tai was indeed abused, Cheng Yaojin racked his brains and used a few idioms, but unfortunately he still used it wrong!

After listening to Li Zexuan, he was speechless for a while, then he said: "Uncle Cheng, Qingque is participating in a research project of cutting-edge technology in the academy. It has been really hard recently, but all of this is all he is willing to do, what are you doing? Can you say I abused him?"

"Research project? What research project? Oh, yes! The ugly boy didn't go home last weekend. Your aunt has been talking about it for a long time! Could it be that he is also participating in this research project?"

Cheng Yaojin's eyes lit up when he heard the words, and then he thought of his precious son, and asked quickly.

"Uh..."

Li Zexuan was at a loss for words now, saying that Cheng Yaojin really looked down on his son, and with Cheng Chumo's grades and his stubborn temperament, how could Li Zexuan arrange for him to do scientific research? Bu Cheng Chu Mo is still recovering in the hospital. If he tells the truth, the kid is not guaranteed to be beaten again. After thinking about it, Li Zexuan can only say vaguely:

"That's right! However, the recent research projects carried out by the academy are all top-secret, and any participants are not allowed to disclose half a word to anyone outside the project. This is a rigid rule, and my little nephew can't make an exception. I hope Uncle Cheng can forgive me. !"

"Top secret? What project is so mysterious?"

Cheng Yaojin became more interested when he heard it. Old Cheng was 10,000 convinced about Li Zexuan's ability to create new things. For example, the variable-speed disc brake bicycle that he can't put down now, so he can make Li Zexuan so serious. project, it must be a good project, so he asked a little unwillingly:

"Xiao Xuan, really can't tell this old man? You Uncle Cheng is not an outsider, so it's impossible to tell other people. Besides, you are the mountain chief of Yanhuang Academy, aren't you all the rules? what?"

Li Zexuan said helplessly: "Uncle Cheng, just because I am the head of the Yanhuang Academy, I have to lead by example. If I don't follow the rules, how can I expect other people in the academy to follow the rules? So this matter, the little nephew really can't follow the rules. You said it! But don’t worry, this research project is definitely beneficial to Datang!”

"Oh! Don't you mean you didn't say anything?"

Old Cheng Nian muttered, but he also knew that it was impossible to ask the truth from Li Zexuan's mouth, so he did not continue to ask. Seeing this brand-new bicycle pushed in his hand, Lao Cheng's interest became high again, he laughed and said:

"Haha! Then Xiaoxuan, you are busy! The old man will go back to Chang'an first! I don't want that old bicycle, it's enough to have this one! Haha!"

Facts have proved that Lao Cheng is a person who likes the new and hates the old. The old guy rode a variable speed bicycle and left the workshop like a gust of wind. He took pity on the dilapidated bicycle he rode earlier, and could only lie quietly in a corner of the workshop. Eat ashes!

…………………………

After Cheng Yaojin left, Li Zexuan arranged for the rest of the bicycles to be delivered to Qin Qiong, Yuchi Jingde, Niu Jinda, and Li Jing's homes. of. In addition, Li Zexuan also sent Liu Feng and Liu Yun to the palace to deliver three variable speed bicycles to Li Er, Li Chengqian and Changle respectively.

It is said that after the cure of Changle's qi disease, the whole person is more lively and active than before, and it is suitable to give her a bicycle with a variable speed version!

"Qing Que, I suddenly have an idea for my teacher, can you come and see if it's feasible?"

After everything was arranged, Li Zexuan came to a yard in the deepest part of the workshop, found Li Tai who was modifying the telegraph machine, and said.

This courtyard is the secret research base for the second and third killer projects of the academy. Outside the courtyard is guarded by a group of personal guards from Li Zexuan day and night. All personnel entering and leaving must have their identities verified.

At present, the personnel involved in these two killer projects are being recruited and screened nervously, but this does not affect Li Tai, the deputy chief designer, in advancing related work. In just a few days, Li Tai has created a simple Resistors, capacitors, inductors and other electronic components, coupled with the electronic diodes and electronic triodes previously built by the workshop, it can be said that Datang's electronic industry foundation has gradually taken shape!

"Oh? Chief, please say it!"

Li Tai, who was busy, immediately put down his work when he heard the words, looked up at Li Zexuan and said.

Having "mixed" with Li Zexuan for so long, Li Tai knows that every idea of ​​Li Zexuan has the potential to change this era, and he dare not take it lightly!

Li Zexuan pondered for a moment, then said: "Qingque, the telegraph we are making now transmits information through the mutual conversion of electricity and electromagnetic waves. This kind of telegraph used in the army can indeed coordinate the curtain and predict the enemy's opportunities, but if day

After the common people have the need for ultra-long-distance communication, the telegraph becomes inconvenient!

So what I thought was that we might be able to make a device that can convert sound into electricity, and then electricity into sound, so that only one wire is needed to connect, and real-time sound transmission at both ends of the wire can be realized! "

This is actually a wired telephone. Li Zexuan wanted to do it for a long time, but before Datang had no industrial foundation and could not do it if he wanted to, but now it is different...

These words may sound a little far-fetched to others, but Li Tai did not rush to deny it. He pondered for a long time before he said:

"Electric Harmony? Shan Chang, your idea sounds okay. After all, sound does not travel far, but electricity can travel far! But if it is implemented, our first step is to solve how to make the two kinds of electric harmony. It's a matter of converting completely different energies into each other!"

specialized!

I have to say that Li Tai is now more professional than before, and he can see the essence of the problem at a glance.

Li Zexuan admired: "Haha! Qingque, you are right! To realize long-distance real-time sound transmission, the first problem is to solve the problem of mutual conversion between electricity and sound! Although they are two different energies, but It's not necessarily that they can't be transformed into each other! For example, electricity and magnetism in the past were not of the same kind, but with Miss Mo's efforts, can't they be transformed into each other now? I have a preliminary idea here. I will tell you first. Listen, and think about it in private!"

"Mmmm! Chief, please say it!"

Li Tai nodded hurriedly, not at all dejected because Li Zexuan wanted to put more burdens on him. He is a person who was born with a new love and pursued new technologies. Otherwise, he would not let Xiaoyao Wangye go to the workshop to suffer!

Li Zexuan picked up the pen and paper at this time, and wrote while drawing: "Actually, it is not difficult to convert electrical energy and sound energy into each other, but magnetic field energy is needed as an intermediate medium! Look at Qingque, we can be at the front of the machine, Use this cone-shaped paper cone to collect sound. You have studied "Physics" and you should know that sound is a sound wave generated by the vibration of an object. Similarly, when the sound wave hits the paper cone, it will cause the surface of the paper cone to generate tiny vibrations.

At this time, if we attach a copper coil to the bottom of the paper cone, and then place the copper coil in a permanent magnetic field, when the front end of the paper cone receives sound, it will drive the coil to vibrate, and the coil will cut the magnetic field line, which will produce With the current corresponding to the frequency of the sound wave, we have completed a process of generating electricity from a sound wave!

As for how electricity is converted into sound waves, this is also simple. The method of attaching the electric coil to the bottom of the paper cone and applying a permanent magnetic field is also possible. When the current passes through the coil, a corresponding magnetic field is generated in the coil. This magnetic field interacts with the applied permanent magnetic field, which causes the coil to vibrate with the sound current in the applied permanent magnetic field, and the cone diaphragm and the coil are connected together, so the diaphragm also vibrates .

You should know that under the same voltage, the size of the magnetic field generated by the same energized coil is proportional to the size of the current, so when the current passing through the coil is larger, the more violent the coil moves in the magnetic field, the louder the sound. , so the vibration of the coil can produce a sound similar to or exactly the same as the original audio signal waveform.

From this, we can realize the conversion from sound to current, and then from current to sound. As long as the wire is long enough and the power is large enough, our voice can travel far enough! "

Li Tai was a little stunned. Facing such an exquisite design, he was so excited that he even forgot his own breath. Maybe this is suffocation for the dream!

After a long time, the little fat man finally recovered from the shock. He took a few deep breaths, and then looked at Li Zexuan with the eyes of the monster, opened his mouth, and was speechless for a long time!

"Mountain... Mountain Chief, this design is so ingenious! It's so ingenious and amazing!"

His lips were trembling for a long time, and Li Tai finally opened his mouth and said: "If it can be done, then there will be no need for a telegraph in the future! Chief, how about we just start researching this kind of machine that transmits sound over a thousand miles and give up on improving the telegraph? "

Li Zexuan quickly waved his hand and said, "No! Qingque, what I just told you was just my idea. From the idea to the product, there is still a long way to go, even if you make it, The audio debugging in the later stage will take a long time, and the improvement plan of the telegraph machine has been scrutinized countless times, and now it is completely natural.

And compared to this kind of sound transmission, the telegraph is not useless, especially for military communications, the telegraph has better confidentiality, even if the enemy captured our telegraph, they still have no password book. use! In addition, the telegraph does not need wires to send and receive telegrams, which is the most convenient when fighting! So in any case, be sure to fix the telegraph first! "

Hearing what Li Zexuan said, Li Tai also woke up from his excitement. He nodded and said, "Yeah! I understand!"

It's just that there was still a flash of disappointment in his eyes. This feeling of knowing that there was a more advanced thing, but he didn't have the time to create it, was really too uncomfortable for the little fat man!

Li Zexuan smiled when he saw this, he patted Li Tai's shoulder and said: "But although we don't have the energy to build such a long-distance sound transmission machine, we can build a simple sound-electric conversion device first. It won't take long!"

"Oh? Chief, what do you say?"

Li Tai's eyes lit up and he said quickly.

Li Zexuan said with a smile: "I just want to make a small thing, Qingque, you can help my teacher make it! This thing is to use the paper cone diaphragm to convert the human voice into electric current.

, and then use a triode to amplify the current, the amplified current flows through the coil, and then through the action of the magnetic field, it vibrates with a more violent amplitude, so that the sound coming out is even louder! I call this thing an amplifier or a loudspeaker. Compared with the long-distance sound transmission machine, this thing is much simpler. If you have the time, try to make one first! "

Li Tai thought about it in his mind, and then excitedly said: "This idea is good! The amplifier is simple to make, but the principle is similar to that of a long-distance sound transmission machine. If this thing can be made, it will be made in the future. The distance from the sound transmission machine is even more confident!"

Li Zexuan nodded and said, "That's the truth!"

After that, he looked at the shadows of the trees outside the house and said, "Okay! Let's do this first, Qingque, you are busy, I will go first!"

Li Tai hurriedly bowed and said, "Mountain chief, walk slowly!"

Having experienced this incident, he admired Li Zexuan even more.

…………………………

"Your Majesty, His Royal Highness asks to see you!"

Around the time of Shen, the palace, the hall of nectar.

After reviewing the memorial for a while, Li Er, who was dozing off with his chin, was suddenly awakened by a shrill voice. Who else could it be if it wasn't Zhao Song? Speaking of this "special" moment, only Zhao Song dared to come and report the matter.

"Oh? Chengqian is here? Let him in!"

Li Er rubbed his sleepy face and tried to cheer himself up.

"Hey~!"

Zhao Song took the order and left, at the same time he couldn't help but breathe a sigh of relief in his heart.

After a while, Li Chengqian came in, and he didn't come in alone, and he pushed a car beside him!

Seeing this scene, Old Li suddenly lost any sleepiness, and without waiting for Li Chengqian to salute, he opened his mouth and said, "Chengqian, why did you push a bicycle in? Huh? No! This bicycle seems a little weird... …”

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