Otaku Engineer in Great Tang Dynasty

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

When Li Zexuan was working on a telegraph and a voltaic battery in the workshop last year, he used carbonized bamboo silk to conduct an electrification test. The bamboo silk could emit a bright light when it was electrified, but it was only for a moment. After a moment of brilliance, the bamboo silk will turn into ashes due to the heat and burning!

Although this experiment failed, it at least proved that carbonized bamboo filaments can be used as filaments. As long as it is not allowed to come into contact with oxygen, its service life can be guaranteed!

Now Li Zexuan uses candles to consume oxygen to ensure that there is no oxygen in the bulb. In this way, the bulbs made of carbonized bamboo silk can be used for a long time!

In 1854, the German watchmaker Henri Gobert, who immigrated to the United States, used a carbonized bamboo filament in a vacuum glass bottle to make the first practical electric lamp, which lasted for 400 hours, but he did not. Apply for a patent in a timely manner.

In 1874, two electrical technicians in Canada applied for a patent for an electric light: a glass bulb filled with nitrogen gas to emit light with an electrified carbon rod, but they did not have enough financial resources to continue perfecting the invention, so they sold the patent in 1875. to Edison. Edison tried to improve the filament after purchasing the patent, and finally made a carbonized bamboo filament lamp that could last for 1200 hours in 1880.

This is already quite powerful. You must know that the life of tungsten filament lamps is only about 1500 hours. Before discovering and mining tungsten ore, it is undoubtedly the most sensible choice to replace tungsten filaments with carbonized bamboo filaments!

"Xiao Xuan! Here are the batteries! Are five enough~?"

According to Li Zexuan's instructions, Yan Shaoning brought five voltaic batteries and walked into the laboratory.

Li Zexuan frowned and said, "It shouldn't be enough! But let's try it first~!"

The voltaic battery made by the workshop to supply electricity to the telegraph, the voltage of one is about one volt, the current is about 500 milliamps, and the five are connected in series, and the voltage is only about five volts, and the light bulb in his hand is about the size of It's not small. The carbonized bamboo wire inside is wound into a spiral shape, so the length is longer and the resistance value is higher. The five volts and the five hundred mA current are enough to light it up!

After all, Li Zexuan connected the five batteries in series, and then led out two copper wires from the top of the light bulb, one end was connected to the positive electrode and the other end was connected to the negative electrode. Suddenly, the carbonized bamboo filaments in the light bulb lit up with a faint light. , this light does not flicker like the previous experiment, but it is lasting and stable. Seeing this, Li Zexuan can't help but breathe a sigh of relief.

"It's on! It's on! Chief! The light is really on~!"

In the laboratory, Mo Lingwei couldn't help cheering excitedly when she saw the faint light from the electric lamp.

"Well! It just feels that the brightness is not enough!"

Yan Shaoning looked up and down for a long time, and said with some regret.

"That's because the voltage is too low! If you increase the voltage, it will definitely be brighter, at least much brighter than a candle!"

Li Zexuan smiled and said.

"Yeah! Wouldn't it be enough for Xiao Ningzi to carry a few more batteries? Xiao Ningzi, go!"

Mo Lingwei pursed her lips and instructed Yan Shaoning.

"Okay! Then I'll go get five more batteries!"

In the face of "the will of the goddess", how dare Yan Shaoning refuse to obey? He quickly stood up and was about to leave the house.

It is said that the voltaic battery made of salt water has a low power generation efficiency, so each voltaic battery is integrated with many small compartments to ensure that the voltage of each battery can be used. The weight is not light, and the five pieces together are about ten pounds. It is difficult for Yan Shaoning to say it!

Seeing this, Li Zexuan hurriedly said:

"Forget it! No need! Since this light can be on all the time, it means that our idea of ​​​​making a light is right. It will not be too late to do the experiment until the dam opens the gate to release water and the generator starts to generate electricity! Take advantage of this meeting. In time, we need to make several sets of lamps with different withstand voltage values, and keep them for experiments with generators and transformers in the future! After all, no one knows what the voltage from the generator is? The voltage after the transformer is converted is How many?"

What do you want to say that the academy lacks the most? That is all kinds of instruments, measuring tools!

First of all, due to the constraints of technological conditions, various measuring tools in ancient times are actually not accurate. Although the accuracy of rulers, scales, and measuring buckets can meet daily needs, if they are used in precision manufacturing, it is far from enough. !

Now because of the Bahe Hydropower Station, Lantian County will soon be able to use electricity. When it comes to electricity, it also needs measuring instruments such as voltmeters, ammeters and ohmmeters. These things are not easy to manufacture, and they are formulated for these new physical quantities. The unit standard must also be carefully considered and approved by the majority of people!

Li Zexuan intends to wait until later to leave, and organize the elite forces of the academy to establish the Datang Metrology Institute to unify the old measurement units and formulate new measurement standards for new physical quantities. In addition, the measurement used in engineering in the future will be Tools and measuring instruments all need Datang Metrology Institute to make a standard instrument, and all subsequent related instruments must be calibrated according to this standard instrument to ensure that the error is within the acceptable range!

After the establishment of the Datang Metrology Institute, Li Zexuan can continue to use modern measurement units such as "meters, kilometers, grams, kilograms, volts, amperes, watts, kilowatts"!

Moreover, in order to engage in precision manufacturing and processing in Datang, the first step is not to build machines, but to unify measurement standards and make more precise

Only in this way can more precise machine tools and more precise parts be produced!

There is a saying called "A little bit is lost, a thousand miles is lost", and it is most appropriate to use this sentence in the field of precision manufacturing and processing!

"Oh! That's fine! But Chief, what can I do to make the voltage resistance of the electric lamp filaments different~?"

Mo Lingwei nodded thoughtfully, and then asked suspiciously.

Yan Shaoning also turned his attention to Li Zexuan. He didn't understand the electrical part of the "Physics" textbook that Mo Lingwei understood, and he didn't understand the questions that Mo Lingwei didn't understand!

Li Zexuan thought for a while and explained: "Under the same voltage, the smaller the resistance of the filament, the greater the current passing through it. For example, when we use a wire to directly connect the positive and negative ends of the battery, Although the voltage of the battery is very small, the resistance of the wire is almost zero, the current through it will be infinite, and the temperature of the wire and the battery will rise sharply! So only the larger the resistance value, the voltage it can withstand The bigger it is!

The reason why I made the filament into a spiral shape is to increase the length of the filament. The longer the length, the greater the resistance. On the other hand, the spiral shape of the filament is actually equivalent to an inductor! In a DC stabilized circuit, the inductance is equivalent to a short circuit, and the resistance value is negligible!

But in sinusoidal alternating current, the inductance will form a certain resistance to the current! There will be voltage on both sides of it, and current will flow through it. The lower the frequency of the sinusoidal alternating current, the less the inductance will hinder it, which is equivalent to a low-pass filter.

Therefore, making such a spiral filament is more conducive to increasing the withstand voltage value of the bulb! "

When Mo Lingwei heard the words, she digested it for a while before she nodded and said, "Yeah! Chief, I understand! Then let me do the lamps with different withstand voltages!"

Li Zexuan just saw the whole process of making the light bulb, and she saw it in her eyes. Overall, it was not difficult, so she took the initiative to ask Ying.

Li Zexuan nodded, got up and said, "That's good! It's hard work for Miss Mo!"

After all, he looked at Yan Shaoning on the side, and then went out.

"Hey! Weier, I'll help you do it together!"

"Humph! Who wants your help?"

"No! Look at rough work like drilling, you can't be a girl's house, can you?"

"Well...it seems to make some sense..."

Outside the house, when Li Zexuan heard the conversation between the two, he couldn't help shaking his head.

………………

"Open the gate! Release the water!"

Two days later.

All canal construction and waterwheel placement projects in Lantian County have been completed. In Lantian County, hundreds of thousands of acres of fertile land that has been dry for more than half a month can finally be nourished again today!

Next to the Bahe Dam, with Li Zexuan's order, the dam opened a gate, and the surging river water in the dam rolled down. Pentium turbulent!

"There is water! There is water~!"

"Finally there is water flowing into the fields! Great! Great!"

"Master Hou is merciful! Otherwise, there will be a severe drought this year, and our crops are likely to fail!"

"Yes! Yes! I heard that the dam master spent hundreds of thousands of kuan to build it!"

"And this canal, I heard that the cement used in it was all produced by the master himself. This thing can't be bought outside, but the master brought it to us to repair the canal. We must use it for the rest of our lives. Thank you for your kindness!"

"That's a must! With such a good Marquis on the stand, that is our ancestors burning incense! If anyone doesn't appreciate Marquis's kindness, he is a white-eyed wolf and should be stabbed in the spine!"

Seeing that a large amount of river water poured into the cement ditch that had just been built, the people on the banks of the Ba River suddenly burst into cheers.

"He county magistrate, immediately send people to each Zhuangzi to see which Zhuangzi does not have access to water. If there is any situation, come and report immediately~!"

On the shore, Li Zexuan gave a light command with his hands on his back.

It is said that Lantian County is the first county to divert water into the fields in the surrounding counties of Chang'an City, mainly because the construction plan of the canal was started early and the construction of the canal was completed early. And because of the dam, Lantian County has abundant water resources, which provides a huge convenience!

Therefore, while other counties are still busy repairing canals and loading water trucks, Lantian County has already introduced the water from the Bahe dam into the fields!

He county magistrate was red-faced at this time. Lantian County was the first county to divert river water into the fields. He, the magistrate, also had a bright face. After all, it was not in vain that he had brought all the county government in the past few days. The officials worked hard to keep busy.

Hearing Li Zexuan's order, he hurriedly cupped his hands and said, "Don't worry, Lord Marquis, people have already been stationed in various villages before leaving office~! They will come over to report the situation soon!"

Li Zexuan nodded with satisfaction and said, "Well! Not bad! You will report to me later!"

"Mr. Shan, a generator has started running, relays and transformers have been installed, do you want to go and have a look?"

At this moment, Mo Huai and Mo Lingwei walked over from the embankment of the dam and said to Li Zexuan.

"Try! Of course I have to try~!"

Li Zexuan was shocked. It is important to open the gates to release water and irrigate the farmland, but whether the generator can generate electricity normally is more important, which is related to whether Lantian County can be transformed from agricultural

The era of farming is directly brought into the era of electricity! He took two steps forward and said:

"Mr. Mo, through the relay switch, first cut off the output power of the generator, and then connect the lights in parallel, then turn on the relay switch to see if the lights can be powered on normally! The generator outputs high-voltage alternating current. A little carelessness can be life-threatening! Be sure to pay attention to the safety of electricity, and it is best to wear insulating rubber gloves~!”

Mo Huai nodded solemnly and said, "Master Shan! This old man understands!"

After saying that, he turned and walked towards the control room of the dam.

After a while, under the suspicious gazes of the surrounding people, some people began to erect wires next to the river bank, and there were about ten fist-sized glass balls on the wires, and everyone couldn't help but talk.

"What are you doing, Lord? These threads don't look like hemp ropes!"

"Of course it's not hemp rope. This thread is wrapped in rubber. As for what's inside, we don't know!"

"Rubber? This thing is very expensive! I don't know what's in it, but Lord Hou is so willing!"

"I'd like to know what that glass ball is made of! It feels like Lord Hou is going to do something new again!"

The onlookers were talking a lot, and the gentlemen of Yanhuang Academy who came to "watch the ceremony" all clenched their fists tightly, praying in their hearts that this first generator experiment would be a success!

The manufacture of the generator and the construction of the power station are inseparable from the silent efforts of the teachers of the academy. The dam can be built by the people, as long as the drawings are drawn, but the hydropower station is different. Guidance all the way!

As the first killer project of Yanhuang Academy, the teachers of the academy, especially the teachers of the Physics Department, have contributed a lot of energy to the construction of the hydropower station in the past few months. Experimented!

"Captain, everything is ready, turn on the switch and turn on the light?"

Half an hour later, Mo Huai came over again and asked Li Zexuan.

"Power on! Be careful!"

Li Zexuan clenched his hands secretly and nodded.

He is also nervous and excited at the same time!

……………………

Support (end this site) and share this site with those who need it! Can't find the book, please leave a message!