"Xiao Xuan, why did you mistreat King Wei like this? If His Majesty knew about it, how could he spare you?"
In Qiquge 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 do you start talking about this? Why did I abuse Qingque?"
Li Zexuan was stunned when he heard this.
Cheng Yaojin thought that Li Zexuan was embarrassed to admit it, so he curled his lips and said: "Hey! Isn't this considered abuse? When have I seen the King of Wei before, he was not dressed cleanly and decently, and his appearance was impressive? Look at him now , what’s the difference between him and the ordinary craftsmen in your workshop? If he hadn’t said anything just now, I almost didn’t recognize him! In the words of their literati, he is unkempt and unkempt!”
In order to prove that Li Tai was indeed abused, Cheng Yaojin racked his brains and used several idioms, but unfortunately he still used them wrong!
Li Zexuan was speechless for a while, paused for a moment, and then he said: "Uncle Cheng, Qingque is participating in a cutting-edge technology research project in the academy. It has been really hard these days, but he did it all willingly. You How can I say that I abused him?"
"Research project? What research project? Oh, by the way! That guy from Ugly Cow didn't come home last weekend, and your aunt has been talking about it for a while! Could it be that he is also participating in this research project?"
Cheng Yaojin's eyes lit up when he heard this, and then he thought of his precious son and asked quickly.
"Well..."
Li Zexuan was speechless now. Cheng Yaojin really thought highly of his son. With Cheng Chumo's grades and restless temper, how could Li Zexuan arrange for him to engage in scientific research? However, Cheng Chumo is still recuperating in the medical center. If the truth is told, the boy will probably get another beating. After thinking about it, Li Zexuan could only say vaguely:
"That's right! However, the recent research projects carried out by the academy are all top secret. No one is allowed to reveal a word to anyone outside the project. This is a rigid rule, and my nephew cannot make an exception. I hope Uncle Cheng can forgive me! "
"Top secret level? What project is so mysterious?"
When Cheng Yaojin heard this, he became even more interested. Lao Cheng was very convinced of Li Zexuan's ability to create new things, such as the variable-speed disc brake bicycle that he couldn't put down now. That's why Li Zexuan was so serious about it. project, it must be a good project, so he asked reluctantly:
"Xiao Xuan, can't you really reveal this to me? Your Uncle Cheng is not an outsider, so there is no way he can tell anyone else. Besides, you are the headmaster of Yanhuang Academy. Didn't you set all these rules? So you are so serious. what?"
Li Zexuan said helplessly: "Uncle Cheng, just because I am the principal of Yanhuang Academy, I have to set an example. If I don't abide by the rules, how can I expect other people in the academy to abide by the rules? So my nephew really can't follow this matter. Say it! Don’t worry, this research project will definitely be beneficial to Datang!"
"No! Isn't that the same as not saying anything?"
Lao Cheng muttered something, but he also knew that it was impossible to get the truth from Li Zexuan, so he did not continue to ask. Seeing the brand-new bicycle he was pushing, Lao Cheng's interest became high again. He laughed and said:
"Haha! Then Xiaoxuan, get busy! I'm going back to Chang'an first! I don't want that old bicycle anymore, this one is enough! Haha!"
Facts have proved that Lao Cheng is a man who likes the new and hates the old. This old guy rode a variable-speed bicycle and left the workshop like a gust of wind. Unfortunately, the dilapidated bicycle he rode over before could only lie quietly in a corner of the workshop. Eat ashes!
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After Cheng Yaojin left, Li Zexuan arranged for the remaining transmission bicycles to be sent to the homes of Qin Qiong, Yuchi Jingde, Niu Jinda, and Li Jing. These families were the closest to him. If you have good things, you must not forget them. of. In addition, Li Zexuan also sent Liu Feng and Liu Yun to deliver three variable speed bicycles to the palace, one for Li Er, Li Chengqian and Chang Le respectively.
It is said that after Changle was cured of her illness, she became more lively and active than before. Now it is just right to give her a variable-speed bicycle!
"Qingque, my teacher suddenly has an idea. Can you come and listen to it and see if it's feasible?"
After everything was arranged, Li Zexuan came to the deepest courtyard of the workshop, found Li Tai who was modifying the telegraph machine, and said.
This villa is the secret research base for the academy's second and third trump card projects. There are a group of Li Zexuan's personal guards guarding the outside of the courtyard day and night. All personnel entering and leaving must verify their identities. It is considered to be heavily guarded!
Currently, the participants of these two killer projects are being intensively recruited and selected, but this does not affect Li Tai, the deputy chief designer, in promoting 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 transistors previously made by the workshop, it can be said that the foundation of Datang's electronic industry has gradually taken shape!
"Oh? Chief, please tell me!"
Li Tai, who was busy, immediately put down what he was doing when he heard this, raised his head and looked at Li Zexuan.
After "hanging around" with Li Zexuan for so long, Li Tai knows that every idea of Li Zexuan may change this era, and he does not dare to have any contempt!
Li Zexuan pondered for a moment and said: "Qingque, the telegraph machine we are making now transmits information through the mutual conversion of electricity and electromagnetic waves. This kind of telegraph machine can indeed coordinate the strategy and predict the enemy's opportunities when used in the army, but if In the future, when people have the need for ultra-long-distance communication, telegraph machines will become inconvenient!
So what I thought was that we might be able to make a device that can convert sound into electricity, and then convert electricity into sound. In this way, only one wire is needed to connect, and real-time sound transmission at both ends of the wire can be achieved! "
This is actually a wired telephone. Li Zexuan has wanted to do it for a long time. But in the past, Datang had no industrial foundation and could not do it even if he wanted to. But now it is different...
These words may sound a bit fanciful to others, but Li Tai did not deny it in a hurry. He pondered for a long time before speaking:
"Electricity harmony? Chief Shan, your idea sounds feasible, but when it comes to implementation, our first step is to solve the problem of how to convert electricity and sound, two completely different energies, into each other!"
major!
I have to say that Li Tai is more professional now than before, and he can see the essence of the problem at a glance.
Li Zexuan's eyes showed appreciation and said: "Haha! Qingque, you are right! To achieve long-distance real-time sound transmission, the first problem is to solve the mutual conversion problem of electricity and sound! Although they are two different energies, It may not necessarily be impossible to transform into each other! For example, electricity and magnetism were not of the same kind before, but with Miss Mo’s efforts, can’t they be transformed into each other now? I have a preliminary idea here, let me tell you first. Listen and think about it in private!"
"Yeah! Chief, please tell me!"
Li Tai nodded quickly, not at all discouraged because Li Zexuan wanted to increase the burden on him. He was a man who was born to pursue new skills, otherwise he would not have left Prince Xiaoyao alone and would have come to the workshop to suffer!
Li Zexuan picked up the pen and paper at this time, writing and drawing: "In fact, it is not difficult to convert electrical energy and sound energy into each other, but it requires magnetic field energy as an intermediate medium! Qingque, you see, we can use it on the front end of the machine , use this cone-shaped paper cone to collect sound. If you have studied "Physics", you should know that sound is a sound wave generated by the vibration of an object. In the same way, when the sound wave hits the paper cone, it will cause the surface of the paper cone to Produce 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 induction lines, which will produce With the current corresponding to the sound wave frequency, we have completed a sound wave electricity generation process!
How to convert electricity into sound waves is also simple. You can also attach an electric coil to the bottom of the paper cone and apply a permanent magnetic field. When the current passes through the coil, a corresponding magnetic field is generated in the coil. This magnetic field interacts with the external permanent magnetic field. This force causes the coil to vibrate with the sound current in the external permanent magnetic field. The paper cone diaphragm and the coil are connected together, so the diaphragm also vibrates. .
Qingque, you should know that at the same voltage, the size of the magnetic field generated by the same energized coil is proportional to the size of the current. Therefore, when the current passing through the coil is greater, the movement of the coil in the magnetic field will be more violent, and the sound will be louder. , so the vibration of the coil can produce a sound similar 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 electric energy is large enough, our sound can travel far enough! "
Li Tai was a little stunned when he heard this. Faced with such an exquisite design, he was so excited that he even stopped breathing. Maybe this was because he was suffocating for his dream!
After a long time, Li Tai finally recovered from the shock. He took a few deep breaths, then looked at Li Zexuan with the eyes of a monster, opened his mouth, and was speechless for a long time!
"Shan... Chief Shan, this design is so exquisite! It's so ingenious and amazing!"
After trembling for a long time, Li Tai finally said: "If it can be done, then there will be no need for a telegraph machine at all in the future! Commander, how about we just start researching this kind of machine that can transmit sounds over thousands of miles and give up on improving the telegraph machine? "
Li Zexuan waved his hands quickly and said: "No! Qingque, what I told you just now is just my idea. There is still a long way to go from idea to product. Even if you make it, The later audio debugging will take a long time, and the improvement plan for the telegraph machine has been reviewed countless times by us, and now it is completely natural. Don’t leave the near for the far!
And compared with this kind of thing that can transmit sounds thousands of miles, the telegraph machine is not useless, especially for military communications, the telegraph machine has better confidentiality. Even if the enemy captures our telegraph machine, they still don’t have the code book. use! In addition, the telegraph machine does not require wires to send or receive telegrams, which is most convenient during war! So no matter what, be sure to fix the telegraph machine first! "
Hearing what Li Zexuan said, Li Tai also woke up from his excitement. He nodded and said: "Yes! I understand!"
But he still couldn't help but have a flash of disappointment in his eyes. This feeling that he knew there was a more advanced gadget but he didn't have the time to build it really made Li Tai uncomfortable!
Li Zexuan smiled when he saw this, patted Li Tai on the shoulder and said: "However, although we currently don't have the energy to build a long-distance sound transmission machine, we can first build a simple acoustic-electric conversion device, which should It won’t take long!”
"Oh? Chief Shan, what do you mean?"
Li Tai's eyes lit up and he said quickly.
Li Zexuan smiled and said: "I just want to make a small thing, Qingque, please help me make it! This thing uses a paper cone diaphragm to convert human voice into electric current, and then uses a triode to amplify the electric current. The electric 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 transmitted is louder! I call this thing an amplifier or a speaker, compared to that kind of long-distance sound transmission machine , this thing is much simpler, if you have time, try to make one first!"
Li Tai thought about it in his mind, and then said excitedly: "This is a good idea! The loudspeaker 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 able to do that long-distance sound transmission in the future." The sound-transmitting machine makes me feel more confident!"
Li Zexuan nodded and said: "That's exactly the truth!"
After that, he looked at the shadow of the trees outside the house and said, "Okay! Let's do this for now. Qingque, you continue your work. I'll leave first!"
Li Tai quickly bowed and said: "Shan, please go slowly!"
After experiencing this incident, he admired Li Zexuan even more. It was like looking up at the mountains and stopping at the scenery. Although he could not reach it, he yearned for it!
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"Your Majesty, His Royal Highness the Crown Prince wishes to see you!"
Around Shenshi, the Royal Palace, Manlu Hall.
After reviewing the memorial for a while, Li Er, who was dozing off with his chin in thought, was suddenly awakened by a high-pitched voice. Who else could it be if it wasn't Zhao Song? Speaking of this "special" moment, only Zhao Song dared to come over and report the matter.
"Oh? Chengqian is here? Let him in!"
Li Er rubbed his sleepy face and cheered up.
"Here~!"
Zhao Song took the order and left, and at the same time couldn't help but secretly breathed a sigh of relief in his heart.
After a while, Li Chengqian came in, and he didn't come in alone, there was... a car pushing beside him!
Seeing this scene, Lao Li suddenly lost any sleepiness. Without waiting for Li Chengqian to salute, he said: "Chengqian, why did you push a bicycle in? Huh? No! This bicycle seems a little weird... ....”
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