Many people will feel guilty for no reason, Qu Sen is now. Although he knows that he has not made any mistakes, and even if he makes a mistake, it seems that it has nothing to do with the two people behind him.

But I just felt guilty for no reason. This disease is a bit untreated.

"Why don't you play?" Miss Zhou's smiling voice rang out in time.

"That, go back to pick up the post." Qu Sen turned around with a smile.

"We just came from your dormitory. Why did the person on duty say that you were at 8 o'clock this morning? You should have finished it long ago, right?" Miss Zhou was also smiling, but her smile was mixed with joking elements.

Although Li Ying didn't say anything, it was quite hard to hold back her laughter.

"..." Qu Sen began to curse the fool on duty in his heart. The NND duty schedule can be considered a military secret. Why did an irrelevant person ask casually and ask all of them.

If such a person goes to the battlefield, he will be shot every second!

"Speak!" Qu Sen was cursing in his heart, and he didn't say anything. Miss Zhou smiled and sniffed.

"Is that so? I remember wrongly. I've slept a lot recently." Qu Sen scratched his head and began to make excuses.

"I think you've been sleeping too much, but you've played too much, right?" Zhou Li said angrily.

"Sister, it seems that there is no problem whether you are sleeping or playing games. The school's duty leader doesn't care." Qu Sen said dissatisfiedly.

"Well, the leader on duty doesn't care, but how did you Instructor Jiang explain when he left?" Zhou Li's face once again, but it was obviously not funny.

"..." Qu Sen was speechless.

After the school was in winter vacation, Jiang Mei took Yue Peng to Yue Jianjun's place. Before leaving, Zhou Li was responsible for staring at Qu Sen to prevent him from herding sheep as soon as the holiday was on.

It was nothing when my academic performance was not exposed before. Now not only the students, but even the school leaders knew that his grades were outstanding. From then on, I could only continue to be outstanding. If I fall a little bit, it will be degenerate to others.

This is impossible. Students with the lowest grades suddenly reached the middle level, which would definitely be a huge improvement. But if the first place drops to the tenth place at once, it would be a sin.

"Sister, you have to rest, otherwise you will become stupid if you die too many brain cells." Qu Sen complained.

"Oh, OK OK, okay, I'm teasing you, no one is forcing you." Zhou Li changed her face instantly when she saw Qu Sen surrender. She said with a smile and then said, "Let's go, invite Yingying and I to have dinner."

During the holiday, the second, third and fourth floors of the canteen were closed, so Qu Sen would not need to invite him to eat on the first floor. So Miss Zhou meant that everyone would take leave and go out for a delicious meal.

As he went out to eat more times, Qu Sen also knew that Zhou Li and Li Ying didn’t have to have big meals every time, but they were tired of eating the food that was tossed and turned around in the cafeteria, just wanted to change their tastes. So three people couldn’t spend a lot of money on a meal.

So I nodded happily: "Okay, wait until I go back and change my clothes, and then write a fake note."

Zhou Li and Li Ying had already changed their clothes before going out. They were so cold that they didn't want to wait at the school gate, so they followed Qu Sen to Building 9. Of course, they would definitely not follow Qu Sen to the dormitory, but wait in the first floor mailroom, after all, there was heating there.

Qu Sen threw the two girls on the first floor, quickly went upstairs to write a fake note, and asked the on-duty staff to sign, and when he went back to the house to change his clothes, he looked out the window and found that it was snowing outside again.

My heart said, "I can't get out."

The school has regulations that once it snows, students from nursing schools are not allowed to go out. Even if they have already taken leave, they must return in the shortest time.

In desperation, Qu Sen didn't have to change his clothes. He kneaded the fake sticks and threw them into the trash can, greeted the duty officer and returned to the first floor.

Of course, Zhou Li and Li Ying also knew the school’s relevant regulations. After finding out that it was snowing, they realized that they could not improve their lives today. Seeing Qu Sen go downstairs, Zhou Li waved her hand: "Let's go, if you can't go out, please help me with work."

Zhou Li's work is naturally her own private work, which is to install "eyes" and "ears" on the drone. She has been planning this for a long time, but she has been busy some time ago and has no time to implement it. Now that she is free, she is of course planning to officially start construction.

Qu Sen is actually very interested in modifying drones, especially the work Zhou Li is going to do is quite technical. Not only does she have to solder the circuit board by herself, but she also has to write the programmable chip by herself.

Even after changing the control platform from a remote control to a laptop, you have to write the control software yourself.

Because this software not only involves digital signal transmission, but also involves composite signal conversions that Qu Sen has not yet touched on in real time image transmission and audio acquisition, the difficulty is very high, which is far beyond the computer technology Qu Sen now masters.

Qu Sen is still very enthusiastic about learning things he is interested in, so when Zhou Li said that, he followed him to Professor Wu's studio happily.

Of course, he went to the studio to weld a new motherboard for the drone. Because this motherboard was designed by Zhou Li himself, the welding needs to be done manually whether it is the chips used or related originals.

Moreover, because the internal space of the drone is limited, the new motherboard has very high requirements for welding accuracy and density. This work is not good for Zhou Li and Li Ying, and Qu Sen needs to complete it.

Qu Sen originally thought that Zhou Li had mature design drawings and was just waiting for her to start construction. However, when he arrived at Professor Wu's studio, he saw five designs with different ideas, and none of them were complete.

This is so great that Zhou Li can't blame her. After all, she is learning software, unlike Qu Sen who is studying in college. Although she is not good at anything, she has learned some of everything.

Qu Sen had a foundation in electronic circuits before, and he studied professional courses for the past half semester. Although he had no practical experience, he still had a theoretical basis. He got together with Zhou Li and Li Ying and carefully studied all the five design sketches, and the results were denied one by one.

So everything started over. This time, Zhou Li put forward the design requirements and Qu Sen completed the design.

As soon as he started the job, Qu Sen realized that although it was barely enough to ask him to find problems, it was difficult for him to design.

Zhou Li picked up a lot of problems when she only drew the beginning of each time, such as being too complicated, voltage problems, stability, and power consumption problems, one by one, one by one, became a roadblock.

The biggest problem faced is the power consumption. The reason why drones are installed with cameras and sound pickup components is to fly farther and last longer, but if you can fly for more than ten or twenty minutes after full charge, that would be useless.

But whether it is to increase the remote control distance of the drone or install components, it will greatly increase the power consumption. After studying for a long time, the three of them finally came to a conclusion that the existing nickel-cadmium batteries on the drone can no longer adapt to the new requirements anyway.

Therefore, in order to solve the battery life problem, we can only put the motherboard design backwards and first study how to increase the battery capacity without increasing the load on the drone.

For new materials applications, Zhou Li's contact surface is far higher than Qusen.

She proposed three solutions, one is nickel-hydrogen battery, the second is lithium-ion battery, and the third is lithium titanate battery. Among them, lithium titanate battery is first passed because it is too easy to bulge.

Nickel-hydrogen batteries are derived from nickel-cadmium batteries. The biggest improvement is to improve memory effects and be more environmentally friendly. Although the specific energy has been improved, it still does not achieve the effect that Zhou Li expected.

As for lithium-ion batteries, both capacity and weight are very suitable. The models you may find cannot match the existing battery positions of the drone in terms of appearance.

After discussing, the three of them found that the existing knowledge reserves could not solve the problems they faced.

Originally, Zhou Li had many people to ask for help, but this girl was too strong-willed. She was always worried that a call would stump her problem, but others easily solved it. So she thought about surfing the information online and then asking for help when she really couldn't think of any good solution.

But Li Ying's anxious temper could not tolerate her being so stubborn. Seeing that Zhou Li didn't call, she called back to her original unit with just one call.

After Li Ying's undergraduate degree, the unit assigned to her is a small research institute, and the research goals are also very single - the target.

This target is just two words, but it is used in many places, ranging from simulated targets shot by air defense forces to carrying equipment for weapon damage experiments.

Because there are many small things that can fly and run in the product, there are many uses of batteries, but after all, as a target, it is destined to be destroyed, so in order to reduce costs, the battery will definitely not use any high-end products.

Although it can't be used, it doesn't delay people's understanding. So Li Ying called with a phone call and soon received guidance - lithium polymer batteries.

Lithium polymer batteries, also known as polymer lithium batteries, were officially launched on the market in the late 1990s. However, because of their high prices, the domestic use range is very small now.

Compared with lithium-ion batteries, this type of battery has higher energy and lighter mass. The most important thing is that it has very strong plasticity.

And they also pointed out the way to Li Ying, which is the Second Science and Technology Bureau affiliated to the General Assembly Department. There is a new energy research institute underneath that is working on this thing. If you need it, you can contact that side.

After receiving the exact information, Li Ying passed the original words to Zhou Li. When she mentioned the Second Bureau of Science and Technology, her eyes looked a little funny.
Chapter completed!