Many people would feel guilty for no reason, and Qu Sen was one of them now. He knew that he didn't do anything wrong, and even if he did, it didn't seem to have anything to do with the two people behind him.
But he still felt guilty for no reason. This illness was really incurable.
"Why aren't you playing anymore?" Lady Zhou's smiling voice sounded at the right time.
"Um, I'm going back to my shift." Qu Sen turned around with a smile.
"We just came from your dorm. The person on duty said that you were supposed to be on duty at eight o 'clock this morning, so you should have finished by now, right?" Lady Zhou was also smiling, but there was a hint of ridicule in her smile.
Although Li Ying didn't say anything, it was quite difficult for her to hold back her laughter.
"…" Qu Sen began to curse the idiot on duty at the dorm building. Damn, the duty schedule could be considered a military secret. How could an irrelevant person casually ask about it, and he confessed everything?
If this kind of person went to the battlefield, he would be shot dead in seconds!
"Say something!" Qu Sen was busy cursing in his heart, so he didn't say anything. Lady Zhou's smile disappeared, and she lightly snorted.
"Really? I remembered wrongly. I've been sleeping a little too much recently. "Qu Sen scratched his head and began to find an excuse.
"I don't think you've been sleeping too much. You've been playing too much games, right?" Zhou Li said in a bad mood.
"Big sister, whether it's sleeping or playing games, there doesn't seem to be a problem. The school's supervisor on duty doesn't care." Qu Sen said in dissatisfaction.
"Yes, the supervisor on duty doesn't care. But what did Instructor Jiang say before she left?" Zhou Li's face showed a smile again, but it was obviously not funny.
"…" Qu Sen was speechless.
After the winter break, Jiang Mei took Yue Peng to Yue Jianjun's place. Before they left, she asked Zhou Li to keep an eye on Qu Sen to prevent him from herding sheep.
In the past, when his academic results were not exposed, it was not a big deal. Now, not only the students, but even the school leaders knew that his grades were top-notch. From then on, he could only continue to be at the top. In the eyes of others, even a slight drop would be seen as depravity.
This was something that couldn't be helped. If a student whose grades were at the bottom suddenly rose to the middle, it would definitely be a huge improvement. But to suddenly drop from the first place to the tenth place was a sin.
"Big sister, you still need to rest. Otherwise, if too many brain cells die, you will become stupid." Qu Sen complained.
"Aiya, alright, alright. I'm just teasing you. No one is forcing you." When Zhou Li saw Qu Sen admit defeat, her face instantly changed. She smiled and said, "Let's go. Treat me and Yingying to a meal."
During the holidays, the second, third, and fourth floors of the cafeteria were closed. Naturally, Qu Sen did not need to treat them to a meal on the first floor. Therefore, Lady Zhou's intention was for everyone to ask for leave and go out to eat a good meal.
Qu Sen also knew that Zhou Li and Li Ying did not always want to eat a big meal. They were just tired of eating the same dishes in the cafeteria and wanted a change of taste. Therefore, a meal for the three of them did not cost much.
Therefore, he nodded happily. "Okay, wait for me to go back and change my clothes. I'll write a leave of absence."
Zhou Li and Li Ying had already changed their clothes before going out. They did not want to wait at the school gate on such a cold day, so they followed Qu Sen to the ninth building. Of course, the two of them would not follow Qu Sen all the way to the dormitory. They would wait in the mail room on the first floor. After all, there was heating there.
Qu Sen left the two girls on the first floor and quickly went upstairs to write a leave of absence. After letting the guard on duty sign it, he went back to his room to change his clothes and looked out the window. He found that it was actually snowing outside.
He thought to himself, "Damn, I can't go out."
The school had a rule that once it snowed, the students were not allowed to go out. Even if they had already asked for leave, they had to return in the shortest time possible.
Helpless, Qu Sen did not change his clothes. He crumpled the leave of absence and threw it into the wastebasket. He said goodbye to the guard on duty and returned to the first floor.
Zhou Li and Li Ying of course also knew the relevant rules of the school. After discovering that it was snowing, they knew that they could not improve their lives today. Seeing Qu Sen come downstairs, Zhou Li waved her hand. "Let's go. If you can't go out, help me with my work."
Zhou Li's work was naturally her own private work. It was to install "eyes" and "ears" for the drone. She had been planning this for a long time. It was just that she had been busy some time ago and did not have time to implement it. Now that she was free, of course, she planned to officially start work.
Qu Sen was actually very interested in modifying the drone. In particular, Zhou Li's work was quite technical. Not only did she need to solder the circuit board herself, but she also had to write her own program control chip.
After changing the control platform from a remote control to a laptop, she had to write her own control software.
This software not only involved digital signal transmission, but it also involved the composite signal conversion of real-time image transmission and audio collection, which Qu Sen had never touched before. Therefore, the difficulty was very high. It was far beyond Qu Sen's current computer skills.
Qu Sen was very enthusiastic about learning things that interested him. Therefore, when Zhou Li said that, he followed her to Professor Wu's studio.
Of course, he went to the studio to solder a new motherboard for the drone. This set of motherboards was completely designed by Zhou Li. Therefore, whether it was the chip used or the related components, the soldering had to be done manually.
Because the internal space of the drone was limited, the new motherboard had to be soldered with high precision and density. Zhou Li and Li Ying could not do this work. Qu Sen had to complete it.
Qu Sen originally thought that Zhou Li already had a finished design and was just waiting for him to start. However, when he arrived at Professor Wu's studio, he saw five different designs. None of them were complete.
This was not Zhou Li's fault. After all, she studied software. She was not like Qu Sen, who was a college student. Although he was not a master of anything, he still learned a little bit of everything.
Qu Sen already had a foundation in electronic circuits. This half a semester of professional classes, he also studied it. Although he did not have any practical experience, he still had a theoretical foundation. He carefully studied the five design sketches with Zhou Li and Li Ying. In the end, he rejected them one by one.
Therefore, everything was pushed back. This time, Zhou Li proposed the design requirements, and Qu Sen completed the design.
As soon as Qu Sen started to work, he realized that although he could barely pick the problems, it was extremely difficult for him to design.
Every time he only drew the beginning, Zhou Li would pick out a lot of problems, such as too complicated, voltage problems, stability problems, power consumption problems, and so on. One by one, they all became obstacles to him.
The biggest problem they faced was the problem of power consumption. The reason why drones were installed with cameras and sound pickup components was so that they could fly further and last longer. However, after a full charge, they could only fly for ten to twenty minutes. Wouldn't that be a waste of effort?
Whether it was increasing the remote control range of the drone or installing components, it would greatly increase the power consumption. The three of them studied for a long time and finally came to a conclusion. The existing nickel-cadmium battery on the drone could no longer meet the new requirements.
Therefore, in order to solve the endurance problem, they could only put the design of the motherboard aside and study how to increase the battery capacity without increasing the weight of the drone.
For the application of new materials, Zhou Li's contact area was much higher than Qu Sen's.
She proposed three solutions. The first was a nickel-hydrogen battery, the second was a lithium-ion battery, and the third was a lithium titanate battery. The lithium titanate battery was rejected because it was too easy to bulge.
The nickel-hydrogen battery was derived from the nickel-cadmium battery. The biggest improvement was to improve the memory effect and be more environmentally friendly. Although the energy ratio was increased, it still couldn't reach the effect that Zhou Li expected.
As for the lithium-ion battery, both the capacity and weight were very suitable. The model that could be found could not match the existing battery position of the drone.
After the three of them discussed for a while, they found that the existing knowledge reserves could not solve the problem.
Originally, Zhou Li could ask Kendo for help, but this girl's personality was too strong. She was always worried that if she made a phone call, the problem would be easily solved by someone else. Therefore, she thought about looking for information online and asking for help when she really couldn't think of any good ideas.
However, Li Ying's impatient temper didn't allow her to waste time. Seeing that Zhou Li didn't call, she called back to her original unit.
Li Ying was assigned to a small research institute after her undergraduate degree. The goal of the research was also very simple – target.
The target was a simple word, but it was used in many places. It could be used as a simulated target for air defense forces or as a device for weapon damage experiments.
Because there were many small things in the product that could fly and run, a lot of batteries were used. However, as targets, they were destined to be destroyed, so in order to reduce the cost, the batteries were definitely not high-end goods.
Although it was not used, it didn't prevent people from understanding. Therefore, Li Ying made a phone call and quickly received instructions — lithium polymer batteries.
Lithium polymer batteries, also known as polymer lithium batteries, were officially introduced to the market in the late 1990s. However, because the price was too high, the range of domestic use was very small.
Compared to lithium-ion batteries, this type of battery had higher energy, lighter weight, and the most important thing was that it was very malleable.
Also, the person directly pointed Li Ying to the second branch of the general assembly department. There was a new energy research institute that was doing this thing. If there was a need, she could contact them.
After Li Ying received the exact information, she relayed it to Zhou Li. When she mentioned the second branch, she looked at Zhou Li with a funny look.
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