Artificial Intelligence Developer Cheolwoo Lee (4)
In order to harvest the crops buried in the soil, the instantaneous force was approximately 200 Newtons, or 20 kg in terms of kilograms.
In other words, the drone needed the power to lift 20 kg even momentarily.
There is a slight inconsistency here. In the case of a drone, in general, instantaneous power cannot be used.
If it’s a fuel injection method, you can get more power by injecting a little more fuel, but this is because the drone is a system driven by an electric motor.
So, if you use a powerful electric motor, of course, the weight of the drone has no choice but to increase.
I thought about what would be a good way to solve the problem, and it came to my mind.
“Well, I think the propellers will have to be converted a little bit. Propellers are inefficient for providing instantaneous power.”
“Well, of course it is. Propellers are not an invention made for instant power.”
As it goes without saying, the propeller is not an invention made for instantaneous power. It was an invention for easy take-off and landing, average lift and thrust.
“Yes. So I’ll have to change the propeller.”
“So… that doesn’t make sense. The basic of the basics of a drone is the propeller. It’s the principle of using 4 or more propellers to balance them… You mean changing the propellers?”
Researcher Jeong said with a puzzled expression.
“I’ve been thinking a little bit. How can I solve this problem?”
“……So, is it resolved?”
“First of all, we have TT gears and free vector gears. And the biggest advantage of those gears is that you can freely adjust the direction of force if you do something.”
“yes.”
“If you use that gear to make it directional, you could make a new flying object that isn’t a four-propeller drone.”
“Uh… that’s quite possible. But then it’s not a drone, right?”
“…… Um, is that how it works?”
What is the definition of a drone?
“An unmanned aerial vehicle using four propellers, isn’t that the definition of a drone?”
“Well, isn’t a drone another word for a drone?”
“is it so?”
“… Let’s just skip the name. It’s not important right now.”
“Yes. I see. So what type of propellers are made?”
“Uh, so… no, I’ll show you. A test drone might be available in a few days. Let’s see then.”
“Heh heh, a new type of drone. It hasn’t been long since drones were released.”
“I think there may be a battery problem, but I’ll have to look at that a little more. Take a look. I’ll concentrate on designing it.”
“Yes. I understand. That’s what I said, but always fighting!”
“yes.”
Researcher Jeong left, and this time Hye-jeong came to visit.
“Brother, I just heard from Researcher Jung that they are making drones that automatically harvest?”
Hyejeong came over with a strange expression and said.
“Yeah, why?”
“No, if you think about it a little, I think it’s too absurd.”
“Huh? What do you mean?”
“I understood the harvesting robot. But, I think it’s too absurd to make it into a drone. Why is it a drone? If you harvest from the air, considering the weight the drone can lift and things like that, aren’t ground robots much more efficient? “
hmm… … . Certainly Hyejeong was right. Ground robots were more efficient in many ways.
But there was a big downside to it.
“It has a very big downside.”
“Big downside? What is it?”
“The point is that you have to build a new machine for each crop. There are also space limitations.”
If it is not a flight form, there are still many restrictions on movement. Although it can be better for growing crops buried in the soil, fruit hanging from trees is difficult to harvest.
Not only that, but in the case of my father’s pepper farm, the pepper trees are closely attached, so the ground path is too narrow.
There was no room for the machine to work. I don’t know if it’s in the air.
“……But isn’t it too realistic? Drones harvest crops?”
“Hmm… Hyejeong, there’s something to think about. Mobile phones were first introduced in Korea 30 years ago during the 1988 Olympics.”
“It was before I was even born.”
“Yeah, me too. Anyway, listen more. And it wasn’t until the 21st century that mobile phones began to be intensively distributed. It was only 14 years ago.”
“…”
Technology is developing faster than we think.
Only 14 years ago, mobile phones were distributed to the general public, and now smartphones were also available.
“And we recently made the ITE-X engine and the NF network, don’t you feel anything?”
“Um, what can I say to hear that? It feels like the pace of technological development is accelerating.”
“That’s right. Our LF is pouring fuel into the rapid technological development.”
“It’s not us, but Cheol-woo’s brother.”
“hahahahaha, anyway, the goal is not to make an automatic harvesting drone right now, but to make a drone with high instantaneous lift.”
“Then what type of robot will come out? I can’t imagine.”
“Have you ever played StarCraft?”
“I don’t know, but I think I’ve seen the competition a few times.”
“Because there’s a Protoss unit called the Carrier? Think of it as similar.”
“carrier……?”
“There is such a thing. Because that is a romance!”
Hyejeong shook her head and left my room.
* * *
After a few days I was able to complete a new type of propeller.
Then, he called Researcher Jung and Dal-soo Park, a metal processing technician who manages the first floor.
“Can you two take a look at this?”
On the screen, a new type of propeller was drawn in CAD.
“What is this? It looks like a propeller… but it feels a bit different.”
Technician Dal-soo Park, seeing it for the first time, asked what it was.
“Yes. It has a function similar to that of a propeller. No, one function has been added to the function of a propeller.”
“You added one feature?”
“Yes. Existing propellers were difficult to obtain instant lift. There were battery problems, output problems, propeller size problems, and various other problems.”
A car engine just needed to get instant power, but it wasn’t a flying object. I had to get lift. And getting lift was another attempt and invention.
“Is that so? I don’t know much about that field, but things like helicopters are huge.”
From noble mtl dot com
“So I modified the propeller a little bit. I put a small free vector gear on the propeller so I could secure instantaneous lift.”
“……? You put a free vector gear on it?”
“Yes. If you look closely at the propeller part here, there are more small propellers with several free vector gears attached.”
I zoomed in and showed the CAD.
“Eh…? How many small propellers have you attached?”
“Yes. That’s right. It’s a design with a propeller inside a propeller. It’s a propeller that operates when it gains momentary lift.”
“Is this possible? First of all, shouldn’t there be a motor inside the propeller to turn the propeller? Then, of course, the weight of the propeller will increase, and then…”
He thought about this and that for a long time.
“No, there’s no motor going in here.”
“yes?”
“If you’ve studied aerodynamics, you might know this, but… Well, to explain a bit more, when this propeller reaches maximum lift, aerodynamics will automatically adjust the direction of the propeller on the propeller. Here The free vector gears play a big role, and once they’re steered like that, they automatically get additional lift.”
It was a bit difficult to explain, but that was the point.
aerodynamics.
As engineer Park Dal-soo said, a motor and electricity were needed to move the propeller on the propeller.
At first, I tried to design it that way, so in the end, the belly button became bigger than the belly.
So while I was looking for another way, I thought that if I studied aerodynamics in depth and found out the flow of the air, I could get additional lift.
The result is this.
“Is that possible? Automatic steering…. without a power unit?”
“I think it’s possible in theory. I don’t know what will happen when I actually make it.”
“……Wow, isn’t it great that it’s theoretically possible?”
“A theory may just be a theory.”
I felt it keenly when I made the ITE-X engine. A theory is just a theory, and I’ll have to be humble until I see the real possibility.
“Still, it’s great that you invented the theory.”
“hahahaha, no. Anyway, now the design is over, and we have to actually build it. We can make this type of propeller, right?”
“Uh… can I see you for a second?”
“Yes. Of course.”
He went to my computer and carefully reviewed the dimensions on the CAD screen.
“What material do you use?”
“It’s plastic.”
It didn’t matter if it was made of metal, but it didn’t have to be made of metal. I didn’t have to endure the heat, and I didn’t need very strong strength.
“Plastic? If it’s plastic, this… it might be a bit difficult, right?”
“Why? I think I’ve seen a lot of plastic products this small here and there.”
I thought I could make it, of course, but when I heard that it would be a little difficult, I doubted it.
“Oh, of course you can. I mean you can’t make it here. There are no small plastic injection molding machines. There are only large injection molding machines bigger than this. You can’t inject anything this sophisticated.”
“Oh, was that a problem? Then you can place an order outside.”
“wait a minute!”
While we were talking, Researcher Jung interrupted.
“why?”
“You can just buy a small plastic injection molding machine instead of ordering it from outside.
“ah?”
“……I feel a little silly at times like this.”
Researcher Jeong spoke in a very low voice, but I heard it all.
“What did you say?”
“hahahaha, no. CEO Lee, please buy one. Technician Dalsoo Park, how much does that injection molding machine cost?”
“It’s a small model, so I know it’s around 200 million.”
“200 million……is it cheap?”
“……. CNC milling machines do that too. 200 million won is definitely not cheap. CEO Lee.”
“Ha ha ha… That’s right, it’s not cheap. Okay. Then proceed like that.”
“yes!”
“all right.”
* * *
A few days later, a small plastic injection molding machine was installed in our lab, and development of a test drone began.
Technician Dal-soo Park on the 1st floor was a metal expert, but he knew how to handle a plastic injection molding machine and was working on it.
I was working on a circuit.
And the work was almost finished.
“Choi Hak-do, engineer. We explained what we were making at the last meeting, right?”
“Yes. It’s a new concept drone.”
“Yes. I just finished drawing the circuit diagram for that, would you like to take a look?”
This time, I showed the circuit diagram, made with OrCAD, to engineer Choi Hak-do.
He was a technician who worked at COMMAX, and was rumored to be on one finger in Busan this time. I took this opportunity to come to the capital area.
“Oh… have you been drawing this for a while?”
“yes.”
“Wow, really. I heard from the CEO of COMMAX, but I didn’t know that he would draw circuits with such precision. He didn’t just make AHS.”
“thank you.”
“Really, with a circuit of this level… uh, I think it would be in the top 10 in Korea. Even at a glance, the complexity of one layer is over 100.”
“Complexity? Do you use that word?”
“Ah, haven’t you heard of that? There is a level of complexity that can be used in one layer of the circuit diagram, but in general, after working for about 20 years, you can use about 50.”
“Really? Well, I’ve never heard of that.”
“Ha ha, actually I made up words.”
“…”
what is this guy? Are you a bit of an oddball character?
“Then what complexity can you play?”
“I think it’s around 80. CEO Lee is the first to do such dense and elaborate work.”
“Ha ha, thank you.”
“It’s often called a jump line, right? Since the lines through which electrons can’t overlap, it goes down to another layer… If I had made it, it would have been a 6-layer structure, but CEO Lee made it 4-layer.”
“Maybe it’s about the 5th floor?”
According to him, if my complexity is 100, he is 80.
If I made it with a 4-layer structure, wouldn’t it be appropriate for him to have a 5-layer structure?
“hahahaha, well, that’s not quite right. What is this button on the remote anyway?”
He noticed something unusual in the remote control’s circuit diagram and said:
“This is the booster button.”
“A booster button?”
“Yes. If you press this button, it will operate at full power and at that moment the free vector gear propeller on the propeller will start working. The momentary force will rise to 20kg.”
“…… Wow, really. Awesome.”
“It’s a theory, but anyway, can you make this circuit too?”
“Sure. That’s enough. It’s going to take about two days.”
“Yes. It’s perfect. Please start right away.”
After entrusting the circuit diagram to engineer Choi Hak-do, three days passed.
During those three days, engineer Park Dal-soo manufactured the main body and propellers of the drone, and engineer Choi Hak-do fabricated the electronic circuitry to go into it.
And now we gathered all the components and brought them up to the meeting room, and we finished assembling it right away.
“Then let’s test run it right away. Are the batteries charged?”
“Yes! You can operate it right away.”
I lifted the remote control of the drone we made and operated it.
Weeing— Weeing—
The drone made a small noise and slowly rose into the air.