Xueba's Black Technology Simulator

In the northwest area of ​​the confidential airport, Lu Xiao is leading people to check the condition of the crops in the field.

It turns out that a large circle around the airport is full of various crops, including wheat, peas, rapeseed, and broad beans.

Among them, the rape blossoms are already in full bloom and the most eye-catching, the broad beans and peas are in bud, the wheat and corn are green, and the wheat is as tall as an adult's calf.

Further away are green forests, banana forests, and bamboo forests.

A little further away, you can vaguely see the surrounding mountains. The environment here is really unique.

Lu Xiao pointed to the wheat field and said, "In the next few days, let's test it here. For the time being, we don't need to use the helicopter, we need to find the resonance parameters of the wheat straw cells."

Naturally, everyone had no objection, and there were quite a lot of people following Lu Xiao this time.

In addition to two bodyguards and a helicopter pilot, there are also Peng Zhihui, Peng Fangcun, Zhang Bing and two researchers from the drone laboratory.

Everyone went back to the airport.

Secret airports are rarely used, and are generally used when testing fighter jets or when air duty is required.

In fact, people in Rongcheng rarely hear the sound of the sonic boom.

Many j20s produced by Rongfei Group are sent to all parts of the country.

Most of them are in the south near the sea, waiting for the sword to shine.

Therefore, Lu Xiao will not be disturbed when doing experiments.

He returned to the hangar, where there are several ultrasonic and ultra-sonic generators.

Both instruments are huge.

Because Lu Xiao needs higher and higher frequencies, ultrasonic instruments are divided into active sonar vehicles and passive sonar instruments.

However, there is currently no corresponding product for the ultra-sonic generator, which is a device taken from the physics laboratory of the university.

Ultrasound is currently mainly used in the field of microwave acoustics.

It is mainly used to study the interaction between microwave phonons and electrons, thermal phonons, magnons, electron spin quantum and nuclear spin quantum, and its application in the study of solids.

This instrument is from the physics laboratory of HKUST.

Lu Xiao didn't know until he saw the two instruments that he had made a wrong estimate this time.

Both instruments are too big, far beyond his imagination.

The helicopter simply cannot hold these two kinds of equipment.

Knowing that this was a communication problem, Lu Xiao only reported the corresponding parameters. When Secretary Fang cooperated, he searched for the equipment according to the parameters.

Therefore, the equipment obtained is much larger than the equipment used for the ultrasonic modeling experiment last time.

"Secretary Fang, this device is too big!" Lu Xiao said speechlessly.

Secretary Fang frowned and said: "The parameters you proposed can only be perfectly realized by these devices, and you didn't specify what kind of experiment you want to do. Can't the radar car?"

"I need to bring the equipment to collect data in the sky! Ultrasound equipment, just use the one from last time, special ultrasound equipment, I have to think about it again, is there anything smaller than this?" Lu Xiao asked.

Peng Fangcun also realized that there was a problem there, and explained with a sigh: "In terms of ultra-ultrasonic technology, we have not accumulated enough technology, so we can only use this kind of instrument. It is imported from abroad to study basic physics and microwave acoustics."

"You know that the generation of sound waves is to rely on the application of alternating electromagnetic fields on piezoelectric single crystal sheets or piezoelectric films to excite the fundamental wave or harmonic resonance along the thickness direction, thereby obtaining short-wave bulk mechanical waves."

"The most important thing is the accuracy of materials and equipment, which in turn is related to the field of lithography machines and other basic materials, as well as the issue of processing chips."

Lu Xiao didn't understand very well, and his level of physics was not particularly high.

Speaking of software code cryptography, he probably can say a few words, and he has a certain understanding of the world's cutting-edge fields.

Lu Xiao didn't quite understand what Mr. Peng said now.

I probably know that it is because the technology is underdeveloped and cannot compare with foreign countries, so in this small field, it is also lagging behind foreign countries, so we can only use foreign equipment.

"Don't we have all kinds of sonar radars in our country? Could it be that this aspect is also much behind foreign countries?" Lu Xiao wondered.

Peng Fangcun is an expert in this field. He nodded with a heavy heart and said, "Yes, we are far behind! Not so much."

"Although we can manufacture chips, the accuracy is not as good as that of foreign countries. In terms of data processing, if we want to achieve the same effect, the equipment must be larger than others, and the speed of processing information cannot catch up with foreign countries."

"In addition, foreign people have been researching the radar field for so many years before us. We have been catching up, and now only in some functions, we have reached the level of the most advanced foreign equipment ten or twenty years ago."

Secretary Fang also sighed after hearing this: "Although our fifth-generation fighter jets have come out, we are still the only country in the world that independently develops fifth-generation fighter jets, but there is still a big gap in other details."

There are gaps in all walks of life, and Lu Xiao can't take into account the overall situation now.

In many fields, only by relying on the efforts of scientific researchers from all over the country can we slowly catch up with foreign countries.

Lu Xiao now only cares about his own experiment, whether he can continue to do it.

How to solve the difficulties encountered.

Since there is a gap, let's catch up step by step.

For example, the precision problem mentioned by Mr. Peng, it is not impossible for him to develop lithography machines in the future after he has accumulated enough knowledge in various disciplines.

This is his plan after he goes to Shanghai, and he still needs to complete the "Crop Circle" experiment first.

"Let's catch up with the gap in the future. Since the equipment is made in foreign countries, it should be bigger. At worst, we hang the equipment in the air for testing, and then disassemble it and put it into a large transport plane or reconnaissance plane." Lu Xiao said.

Soon Lu Xiao cleared his mind and asked Secretary Fang to find the small ultrasonic radar from last time.

Anyway, the main purpose of using ultrasonic equipment is in automatic modeling, analyzing where and how many times ultra-sonic waves are emitted.

With the equipment from last time, you can model the helicopter in the early stage.

For subsequent data analysis, a super-ultrasonic device the size of a car was hung to collect data in the air.

The process is definitely more difficult.

Lu Xiao wants to study the ultra-sonic equipment and dismantle the place where this equipment does not need to exist.

Only the equipment and interfaces for transmitting ultra-sonic components and receiving ultra-sonic data are reserved.

Seeing that Lu Xiao commanded well, everyone quickly cooperated.

Secretary Fang went to re-apply for the allocation of equipment.

Lu Xiao and Peng Fangcun worked together to study the microwave acoustic instrument brought out by this physics laboratory.

I don't know if it can emit the special ultrasonic wave of the frequency that Lu Xiao wants, and I don't know if the transmission distance is enough.

Because the ultra-sonic equipment used in the physics laboratory is a point-to-point device that emits tiny high-frequency ultra-sonic waves.

The purpose is to study the reaction of substances under the influence of ultra-ultrasonic waves in a microscopic state.

Soon Lu Xiao knew why Xia Guo was lagging behind in this respect.

Because to emit the ultra-sonic frequency he wants, a surface acoustic wave device-an interdigital transducer is required.

This is to make two acoustic-electric transducers on a piezoelectric substrate.

To make an acoustic-electric transducer, a surface acoustic wave filter is required.

The basic structure of the surface acoustic wave filter is to make an electrode structure composed of two 0.1μm thick aluminum films on the polished surface of the substrate material with piezoelectric properties.

It sounds complicated, but to introduce it vividly, it is actually two specially polished sheets on which a certain thickness of aluminum film is evaporated.

Then use a lithography machine to lithographically pattern the circuit, and finally energize to form high-frequency vibrations and send out mechanical waves.

After the ultra-ultrasonic mechanical wave is generated, a special device for receiving the sound wave is required, which also requires a special chip with strong computing power and a more sensitive sheet to receive the echo.

In short, the technology is so difficult that Xia Guo can't make it!

Experts in related fields should not come to slap their faces and deduct details. They have checked a lot of information on the special ultrasound and failed to find it. They only know that it is difficult to achieve. There are also other ways, and I will write about it later, there may be differences between the actual and the written, just treat it as a novel and don't go into the horns.