This is how black technology should be used

Chapter 73 The Complex Electromagnetic Environment and the Cable-Free Future
A group of people are approaching the "Longxing Land" of Practical Technology Group in a bus.

Oh, and it was the original production plant of Practical Technology.

Practical Technology's mobile phone tablets are assembled here, and even for the future mobile phone business, the production scale is specially expanded.

As a result...it didn't work.

But it's not wasted, and even the workers are busier than before.

The people on the bus saw the busy scene of the utility technology company, and many places had been demolished. It looked like a big construction project.

The group was exactly the same people who had been to Practical Technology's "overseas monopoly technology overall research project" many times. The team was still led by Director Wang from the original "high-end lithography machine group".

Since the first happy cooperation, everyone has become acquaintances, and it is definitely the most reliable to send acquaintances without causing the relationship to become stagnant.

But this time not only acquaintances came, but also a few strangers. Some of them were very bookish, and they looked like pure researchers; background researchers.

"Old people" come more often and naturally calm down, while "newcomers" are unavoidably a little nervous when they come for the first time.

When they saw the wall of the practical technology company, they couldn't help whispering.

"I don't know how far the research of long-distance wireless transmission technology on the practical technology side has gone. Has the electromagnetic compatibility problem in the complex electromagnetic environment been solved?"

"It's hard to say, we are trying military... er, civilian ships to go cableless, but judging from the various models we have built, the problem of electromagnetic compatibility cannot be solved."

"It's the same with us. A new generation of war... The cable-free solution for civilian aircraft is also on the agenda, and various models are also stuck in the electromagnetic compatibility level."

At this time, a person wearing glasses glanced at the two, and said indifferently: "Our aerospace department has been studying the cable-free weight reduction solution. The previous mature solution can already reduce part of the cable, and it can make the rocket more 50-100 kg load capacity, but completely cable-free is still not possible.”

"Later, Practical Technology released a long-distance wireless transmission solution. We were very happy at that time, so we purchased a large number of wireless transmission equipment for testing."

"The test results at the beginning were not bad, but as long as the rocket's flight speed is too fast, the complexity of the electromagnetic environment can increase by several orders of magnitude, and this is even more so after entering outer space."

"I hope there is a solution from the practical technology side. If it is possible, then we will be far ahead of foreign countries in this area..."

In fact, not only ordinary users feel troublesome looking at the pile of wires on the computer desk, but there are many people in the world who feel troublesome with wires, and the impact is quite huge.

Inside the rocket, cables weighing hundreds of kilograms form a huge cable network, which not only takes up space, complicated connection operations, and difficult quality control, but also greatly increases the weight of the rocket itself.

The rocket electrical system is composed of multiple systems such as the control system and the measurement system. Between the equipment of each system, "bridges" are set up through cables to realize data transmission and energy transmission.

Due to the large number of equipment, the measurement system is the system with the largest number of cables and the most complicated branches inside the rocket. Hundreds of cables are densely distributed throughout the rocket.

For example, the cable network of the Long March 300 rocket exceeds more than 70 bundles, of which the number of measuring system cables accounts for nearly 800%, and the total number of cable plugs involved exceeds more than [-].

The cable network inside the rocket is covered like a spider web, and quality control has become a top priority.

There are quality control difficulties in the process of cable production, transportation, installation, protection, etc., especially cable disconnection, insulation performance degradation, pin shrinkage, back pinning, and even redundant objects, etc., which have become frequently-occurring and common diseases of quality, and have plagued the industry all year round. More and more bald staff.

Among the quality problems in recent years, cable problems accounted for more than 20%, which is the single product with the largest number of quality problems.

Moreover, some equipment is located in a special location, and the cables are not easy to connect and install. In addition, during the flight of the rocket, the cables are affected by environmental factors such as vibration, and are also prone to damage and other problems.

At the same time, the design of the rocket is also hindered by these twists and turns of cables.

A rocket has hundreds or thousands of sensors, all of which are connected by cables. During the design process, long cables not only increase the weight of the rocket, but also often affect the layout of the internal instruments and equipment of the rocket body. Assembly poses certain difficulties.

Baldness plus one.

Various rocket institutes have explored various solutions, and finally settled on the cableless technology, and some of them succeeded.

That is, the cable-free part of the measurement system.

Aiming at the channel bandwidth requirements for transmission between different devices, using TDMA and FDMA technologies, a wireless networking protocol for rocket measurement equipment was developed to form an orderly "wireless highway" between them.

For example, the use of wireless sensors can eliminate a large number of "nerve ending" cables on the arrow, and the wireless camera device not only realizes wireless transmission of high-definition images, but also avoids long-term transmission of image cables. The same is true for wireless power supply equipment. The communication integration technology realizes the wireless measurement and launch control of the rocket.

On the other hand, "integration" is carried out to build reconfigurable general modules, to carry out generalization, modularization, and board-based design of traditional independent equipment, and to form an integrated combination in a flexible configuration, so that the measurement equipment The number and types of the equipment are greatly reduced, and a large number of connecting cables between the equipment are also replaced by the backplane printed board lines.

The previous measurement system is like a big tree with many branches and thin branches. After "cableless", the main cables between the core groups are left, and the peripheral devices are connected wirelessly. Dries clear, less in quantity and light in weight.

The cable-free technology makes cables disappear, and the simplification of the cable network not only reduces the workload of design, but also simplifies operation and connection, and improves the efficiency of testing, testing and final assembly.

And no longer afraid of accidentally breaking a small thin cable when receiving or laying cables, so that designers can completely escape from difficult quality problems.

Due to the omission of huge and numerous cables, the weight reduction effect of the rocket is obvious, and it can "travel lightly".

Taking the instrument cabin of the Long March 60 carrier rocket as an example, if there is no cable, only the sensor part can reduce the weight by nearly 40%. It will be reduced by more than [-]%, and the weight will be cut in half.

At the same time, it saves 3 to 6 months of cable design, production, testing and other links, and can save a lot of manpower and material costs.

However, the extreme environment must be overcome by the cable, and it is also the one that must be overcome by the cableless system.

The extreme high and low temperature, the powerful impact force when the rocket body is separated, and the extremely complex electromagnetic environment have brought great challenges to the rocket's internal measurement system to achieve "cableless".

So until now they have only achieved a small part of the cableless.

The people of the Rocket Academy have confirmed that cable-free is the development direction of future rockets. In the future, they will make sure that there is no cable inside the rocket.

Especially after the long-distance wireless transmission technology of Practical Technology was born, they were even more confirmed.

They also wanted to combine artificial intelligence technology on the basis of cableless technology to move towards the era of intelligent rockets.

Coincidentally, Practical Technology Co., Ltd. and Lifuture Studio released the "Nilai", and its intelligence also surprised them.

Everyone in the car today came to use the technology to see if there would be more surprises, so a lot of experts in the field were gathered.

They followed the guides and entered the company before getting out of the car, and found that there were no traces of cables here, and all of them were replaced with long-distance wireless legend equipment!
Some node devices will be denser, while some node devices can be separated by 30 meters!
Seeing such a wide range of long-distance wireless transmission equipment in the utility technology, they glanced at each other, and they all saw the hope in the eyes of the place.

"Looks like we've come to the right place!"

　Thanks to Tian Cangling, Xiao Chuanchuan, dsbghost, and Xiaohui for their non-naughty rewards. Let’s update one chapter today and two chapters tomorrow.
　　
　
(End of this chapter)