The Xiao Guo Li Hua talks about is a man in his thirties, whose full name is Guo Ziyang.
Guo Ziyang wears a middle-parted hairdo similar to that of Kun Kun. He is thin and small, only about 165cm tall, and his appearance is ordinary.
However, he is such an ‘ordinary person’ who would not cause any splash if left on the street, but his resume is so glorious that it is outrageous:
In 2002, he was ranked number one in science in a southern province, with a score of 747 in the college entrance examination without any additional points. He graduated with a doctorate from the School of Aerospace and Aeronautics of Shuimu University and became one of the hundred A-level talents of the Chinese Academy of Sciences. He received a senior professional title at the age of 29.
Starting from 2017.
Guo Ziyang gradually participated in the research and development of multiple commercial satellites, and even served as deputy chief engineer of the project.
For example, Guo Ziyang is present in the 46 Beidou navigation satellites, APSTAR 6d, KAZ, Apocalypse 06 satellite, etc.
Therefore, Guo Ziyang is not so much Li Hua's assistant, but more like Li Hua's successor, who was brought along by his side for training.
After receiving instructions from Li Hua.
Guo Ziyang quickly said yes, turned around and left the warehouse.
Li Hua asked the staff to work together to move the assembled gravity gradiometer onto the loading and unloading truck, and led a group of people out of the warehouse to a very open space outside.
The pavement in this open space is paved with simple concrete, and the rough size looks like a 100x100 square.
"Dr. Xu, Professor Huang."
After arriving at the open space, while there was still time, Li Hua introduced the purpose of the open space to everyone:
"This open space is the preparation standby point for the rocket launch vehicle. We currently have two methods before rocket launch, one is horizontal transfer and the other is vertical transfer."
"Vertical transfer occupies a small space, but it is generally used for large equipment, such as the Shenzhou 14, a giant object of more than 70 meters."
"Several series of rockets like the Long March are generally 20-40 meters long, and are commonly used for horizontal transport, so naturally they need such an open standby point."
Everyone nodded suddenly.
I see......
After a while.
Guo Ziyang drove a four-wheel tractor slowly from a distance and quickly stopped in front of everyone.
This tractor looks like it has been modified. It is very powerful. There is no cover on the loading platform, so you can see clearly what is loaded on the truck at a glance:
It was a medium-sized device that looked a little weird. At the bottom was a landing gear. On the shelf was a gray-white flat metal object that was about three meters long and half a meter high... or half a meter thick. Above it was a
Two propellers of about five or six meters.
You could say this thing is a helicopter, but its size is too small to allow people to enter it.
Not to mention the cab and so on, there isn't even a hatch.
But it is too big to call it a drone, and its appearance is completely different from the familiar drones.
Seeing that everyone was a little confused about this equipment, Li Hua greeted the staff to help Guo Ziyang unload it and introduced:
"Professor Huang, Dr. Xu, let me introduce to you."
"This equipment is the F-500 unmanned coaxial helicopter, and it is also the largest single-carrying drone in our country."
"Its length is 2.3 meters, width is 1.2 meters, height is 1.8 meters, rotor diameter is 6 meters, practical ceiling is 5,000 meters, and mission load weight can reach 250 kilograms."
Xu Yun was stunned:
"Drone?"
Although he worked at Chengdu Aircraft Corporation of China for several years in his previous life, he was mainly responsible for theoretical physics research, plus some engine power assistance projects.
So tell the truth.
His understanding of the aircraft body is not very deep, let alone non-project models such as drones.
His knowledge of drones, apart from DJI's awesomeness, only includes combat drones such as Rainbow-7 and Feilong-2 - much of which he learned at the Zhuhai Air Show in 2021
Arrived.
Although combat drones are also called drones, their appearance has no similarity with traditional drones.
For example, the Rainbow-7 model.
Its fuselage is 10 meters long, its wingspan is 22 meters, and its cruising altitude is 10 meters. It is a standard fighter aircraft architecture.
So when it comes to drones.
If you point to a small aircraft and say it is a self-destructing drone, or if you point to a large aircraft and say it is an unmanned fighter jet, Xu Yun can actually accept it cognitively.
But the current F-500, which is neither big nor small, really surprised him...
Perhaps sensing Xu Yun's curiosity, Li Hua walked to the F-500 in a few steps and gently patted its metal shell:
"Dr. Xu, this F-500 unmanned coaxial helicopter was manufactured by the Beihang Helicopter Research Institute and completed its autonomous flight test as early as 2017."
"If you search for keywords online, you will also see news that Lucheng used it to complete the transportation of heavy-duty tower structural parts in December 2019."
"So this is a very mature aircraft. In our plan, we are going to use it to carry the gravity gradient instrument to the sky."
Xu Yun's eyes continued to stay on the fuselage for a while, and he nodded thoughtfully.
Originally, he was still wondering whether this gravity gradiometer should be taken to the sky by a light helicopter. Unexpectedly, Li Hua actually gave him such an answer.
From a process perspective.
With the assistance of the F-500 unmanned coaxial helicopter, many problems that traditional helicopters may cause no longer exist.
And just when Xu Yun was sighing.
Huang Yuting on the side suddenly thought of something and asked Li Hua:
"Wait a minute, Gong Li, I have a question I'd like to ask again."
Li Hua turned around:
"But it doesn't matter."
Upon seeing this, Huang Yuting pointed to the gravity gradiometer on the side and said:
"According to the data you gave, the single flight load of this F-500 UAV is 250 kilograms."
"But our gravity gradiometer has a mass of 400 kilograms. I'm afraid a drone can't pull it up, right?"
"Oh, I was just about to tell you about this."
Li Hua smiled lightly when he heard this, pointed to the tail of the drone, and explained:
"Don't worry, Professor Huang, the drone in our base has been magically modified, and its load capacity has been greatly upgraded."
"Theoretically, as long as the object does not exceed 600 kilograms, it can be easily carried into the sky - this is a special modification based on the situation of our launch base. After all, the functions of our base are somewhat special."
"Of course, this kind of magic modification sacrifices the flight height and flight time limit of the aircraft. After the magic modification, the flying height of the drone is only 3,000 meters, and the single flight time is also reduced from five hours to about two hours."
Huang Yuting followed Li Hua's direction and looked at the drone. She noticed that the length of the fuselage was indeed longer than what Li Hua reported, and then she nodded slightly:
"I see......"
As the daughter of Professor Huang Danian, although Huang Yuting has not entered the national defense system, she does know something about some of it.
for example......
In addition to launching rockets into the sky, domestic satellite launch bases also have a special mission, which is to serve as storage points for special materials.
Some of these special supplies are emergency supplies, while others are decommissioned but not destroyed equipment or ammunition - such as some firepower and wind power generation equipment, and the famous Type 67 wooden handle grenade, etc.
At the same time.
The plate in this area of Sichuan Province is quite special. Once some accident occurs, the Xichang Satellite Launch Base will temporarily take on another task:
Transfer the reserved emergency supplies to support various places.
The transfer point of the base is the nearby urban area of Xichang, which is only more than 60 kilometers away from the base. Therefore, the transfer drone has a functional requirement - it does not need a particularly long battery life, but the load capacity must be high.
Therefore, the modified version of F-500 came into being.
...........
Then under the operation of the staff.
The F-500 unmanned coaxial helicopter quickly and smoothly moved from the truck to the ground, and the gravity gradiometer was fixedly connected below.
Looking at this combination of machines and equipment, Xu Yun's eyes were filled with excitement and expectation, but also a hint of worry.
It was said above.
Compared with traditional helicopters, the impact of UAV transportation on the measurement environment is much lower, especially when near the ground.
But on the other hand.
This combination is bound to be far inferior to traditional helicopters in terms of balance performance, so the requirements for the balance module of the gradiometer itself are very high.
During the entire design process of the gravity gradiometer.
The measurement module was designed by Xu Yun, and Huang Yuting’s structural design also conforms to the award icon.
Only Xu Yun, the balance module responsible for Ge Tongyou, has no foundation.
Although he has respect for veteran astronauts like Ge Tongyou, he has never had any experience with them on projects, so it is normal to have worries.
However, Ge Tongyou didn't understand Xu Yun's thoughts. At this time, the old man who retired and was re-employed checked the last link personally, returned to Li Hua, and nodded to Li Hua:
"Lao Li, everything is normal and you can test fly."
Li Hua said yes to him, indicating that he understood.
At the same time, he turned over his wrist and glanced at his watch:
"11:17 am...Xiao Guo, when will the next reconnaissance satellite bypass the base?"
Guo Ziyang took out a tablet-like device from his body, tinkered with it a few times, and quickly said:
"In 1 hour and 16 minutes, Worldview-3 will pass over our heads, and in 2 hours and 11 minutes, SkySat will pass over Xichang."
Li Hua breathed a sigh of relief, he had enough time.
At present, the time it takes for most satellites to circle the world is about 90-120 minutes, but the photo interval is not necessarily this number.
At present, the satellite with the highest accuracy in the world is the keyhole across the sea...that is, kh-12, with a maximum resolution of 0.1m and a cost of US$2 billion.
This cost is equivalent to 2 Type 055 cruisers, or 2/3 Shandong ships, which are also our main satellites for 'observation'.
By the way.
The only institution in our country that is capable of competing with kh-12 is the Changguang Institute, and it produces a large number of practical results every year. As a result, as soon as the news that the scientific research funding of Changguang Year exceeded 3.3 billion Chinese dollars came out, there were a lot of
People are criticizing the waste of funds, which is quite frustrating...
And except kh-12.
There are also a lot of "commercial" satellites passing over our heads every day, especially in third-tier areas like Sichuan Province.
For example, the worldview-3 satellite mentioned by Guo Ziyang is a reconnaissance satellite affiliated with digitalglobe company. The resolution of satellite photos is 0.3 meters.
skysat is affiliated to the company, and the resolution of satellite photos is 0.5 meters.
That's right.
company.
It was this company with so-called commercial remote sensing that originally released photos of the Akhtubinsk National Test Flight Center in Astrakhan Region.
Therefore, in many cases, national defense is not as easy as just talking, and the investment in both human and financial resources is not small.
His eyes returned to reality.
After confirming that there were no satellites flying across the sea in a short period of time, Li Hua immediately issued instructions:
"All the main control departments are in place for the final verification!"
Ten seconds passed.
As the gravity gradiometer was moved out of the warehouse, several voices sounded on the main console:
"Report, the drone power system has been inspected!"
"Report, the sensor reading of the gravity gradiometer is normal, and the photosensitive offset is six zeros!"
"The power is on, and there are no abnormalities in the two impulse units of 405 and 177!"
Hear this.
Li Hua took a deep breath, raised his palm, and gave a decisive order:
"Lift off!"
Buzz buzz——
As the order is issued.
The gravity gradiometer below the drone first made a startup sound, and the indicator light at the bottom quickly turned on.
Then the second one up....
The third.....
the fourth.....
And finally the fifth indicator light...
The rule that five fingers cannot work does not seem to apply today.
Immediately afterwards.
The propeller of the F-500 unmanned coaxial helicopter began to rotate slowly.
First it was three to four seconds, then it became faster and faster, and in the end there was only a burst of afterimages.
at the same time.
As the entire power system starts up, the fuselage begins to rise slowly with the propeller.
True spiral to heaven.
About thirty seconds passed.
In everyone's expectant eyes.
The bottom of the gravity gradiometer left the ground, and the distance from the ground became larger and larger...
One minute later.
The drone, equipped with a gravity gradiometer, stayed steadily in the air about sixty meters above the crowd.
However, seeing this situation, Li Hua, Xu Yun and others were not too excited.
It can only be said that the f-500 with a load of 600 kilograms drags a gravity gradiometer with a load of 400 kilograms. The real test lies in the measurement of the data.
Then Li Hua glanced around a few times, suddenly pointed to the open space in the southwest, and said to the drone operator:
"Xiao An, take the drone in that direction and make a simple circle with the manhole cover on the ground as the center."
The operator immediately stood at attention:
"receive!"
Having said this.
Li Hua turned around again and said to Xu Yun:
"Dr. Xu, after the plane arrives in the area, let's start measuring the situation on the ground."
Xu Yun also had a straight expression:
"clear."
Then very quickly.
Under the guidance of the operator, the drone hovered in the direction pointed by Li Hua and quickly circled around.
And just as the drone was making its way around.
Multiple complex tables gradually appeared on the measurement screen of the gravity gradiometer, with some data jumping on each table.
If the readers of Xu Yun's previous life were allowed to see these data, everyone would surely have a clear gaze that has not been contaminated by knowledge...
However, for industry insiders such as Xu Yun and Huang Yuting, these data appear extremely clear.
The main display number of the gravity gradiometer is called e, and the unit is 1e = 10?? s?2. Depending on the different characteristics of different objects, different e values will be displayed on the screen.
ten minutes later.
Da da da--
Several sheets of paper slowly appeared at the printer exit.
Zhang Han, who was responsible for assisting Xu Yun, quickly took these reports and handed them to Xu Yun:
"Dr. Xu, the summary report is out."
"Thank you."
Xu Yun simply thanked her, took the report and read it.
After a while.
Xu Yun raised his head again and said to Li Hua, who looked expectant and nervous:
"Gong Li, according to the detection of the gravity gradient meter, the area under the ground you are referring to should be an integration point of the base's drainage system."
"There are a total of six pipes converging at this integration point. The top pipe comes from the direction of 26° east-south..."
"At the same time, there is a fracture under the manhole cover. This shadow with a high sedimentation coefficient should be...a water pump? If it were in the wild, it might also be considered a coffin..."
Then Xu Yun paused, and his eyes stayed on one of the signal integration diagrams for a few seconds:
"In addition, we also detected some small activity gradient information. If nothing else, it should be cockroaches."
"In this regard, I suggest you choose our company's disinfection products. Out of disgust for cockroaches... ahem, to support the national defense industry, I can provide products to our base for free..."
Li Hua's eyes suddenly lit up.
The Xichang launch base is surrounded by high mountains and forests, and the drainage facilities for thousands of people in the entire base can basically only go through one or two fixed integration points, so there are quite a lot of cockroaches in the base to be honest.
In fact, when Xu Yun first arrived at the base, Li Hua was thinking about how to discuss cockroach disinfecting with Xu Yun.
After all, Huadun Biotech is a genuine scientific company, and with Xu Yun’s current contribution, it is completely compliant in terms of political review...
Of course.
This thought just flashed through Li Hua's mind, and he quickly returned his energy to the main business.
That is......
The test results Xu Yun mentioned...
Surprisingly, the situation underground in that area is exactly the same!
...
Note:
It’s the last few days of the month, please give me some monthly tickets.
I’m going to play a big game next month. If I don’t meet the update target, I’ll use an old vest, not one with only a few hundred thousand words, but with high-quality results.
