Movie black technology

As we all know, the working environment in space is extremely harsh.

Due to the lack of air, the ubiquitous heat dissipation medium on the ground, the temperature of objects is greatly affected by sunlight.

For the same item, the temperature difference between when it is exposed to light and when it is backlit in space will be very large.

Taking the International Space Station as an example, its surface temperature is about 121°C when it receives light. When it flies into the shadow of the earth and enters the backlight state, the surface temperature will drop to about -157°C, and the temperature difference between front and back is close to 300°C.

In addition to temperature, there is unavoidable cosmic radiation in space. It is not very difficult to deal with high and low temperatures. Cosmic radiation is the real killer to chips.

Because cosmic radiation will affect the calculation inside the chip, thereby changing its calculation results, such as changing the state of a certain circuit node in the chip from 1 to 0...

This kind of error is very serious whether it is in the binary system used by the computer or the decimal system used in daily use. As long as it occurs once, the calculation this time must be wrong.

If we talk about it in a more general way, it can be said that cosmic radiation is like a pervert, slapping the chip all the time in space, and constantly asking it what is the result of 1000-7, then -7, and then infinite -7, as long as the chip "Wrong answer" once, the ending is likely to be GG.

Once the cosmic radiation interference is successful, the rocket and the spacecraft will misjudge their state and even their position as if they were in a trance, and then the error correction program will start and perform operations...

In space, any wrong operation can be fatal, even if the spacecraft automatically opens a certain valve.

Therefore, chips to be used in space generally have to be designed for radiation resistance reinforcement. Simply put, radiation resistance is added to the design at the chip design stage, and at the same time, other radiation resistance processes are added at the later manufacturing level. , a double insurance in design and manufacture.

Of course, the chip does not have to be anti-radiation treatment.

After all, although radiation-resistant chips are safe and reliable, their performance is far inferior to the most common household chips currently on the market.

For example, the performance of the chips used in the lunar rovers and Mars rovers of various countries in the world is not as good as that of the chips in the mid-to-late 1990s. Just find a chip in the hands of a trash guy on the post bar, and the chips in the hands of these advanced technologies are better. I don't know how many times.

Moreover, the price of this kind of chip is also very expensive. In the past, the asking price from abroad to China was basically two to three hundred thousand or even one million.

However, under normal circumstances, dozens of rockets will be used for just one rocket...

It was not until the localization of this thing was successful that its price myth was shattered. The domestically produced Godson only costs tens of thousands.

But the cost is still too high, so some people will use other methods.

That is to put ordinary chips directly on rockets or spacecraft.

It's just that it's different from the general situation. You need to put a few more, usually more than three.

These three chips will perform the same task when the rocket is running, that is, calculate the same problem. If the results calculated by the three chips are consistent, they will be executed. If they are not consistent, they will be restarted and calculated again.

After all, cosmic radiation can only affect the calculation results of the chip, and cannot directly destroy the chip, so although this method of answering each other is a bit stupid, it is still very practical.

However, the method used on the Tibetan Antelope is not such a tricky method. Otherwise, Chen Shen and Tang Huacong would not have to spend time on the aerospace chip, and would directly throw the latest carbon-based chip into it, and the driver would be able to log in to Shenzhou World in it. .

For Chen Shen's scientific research projects, he will try his best to replace some small projects or small details that can be replaced by existing technologies.

Because it can save a lot of time. For example, the previous boxer number, the chips on it are all substitutes he found on the market, and the photoacoustic scanner, the whole machine has been replaced by him. , turned into a large machine covering an area of ​​nearly ten square meters.

If it weren't for the fact that the chip on the Tibetan Antelope could not be replaced by the current technology, Chen Shen would definitely use the current domestic Godson as the top, and then slowly make up other homework later.

"Are these chips samples?"

In the office where the Tibetan Antelope project existed in name only, with only a few tables, large and small, Tang Huacong brought samples of the latest aerospace-grade chips.

The chips in front of Chen Shen have been packaged, and they look like a small, flat, regular cube, just like the CPU pictures you see on the Internet.

Their upper and lower sides are natural black, and a blue Tibetan antelope head and special number are printed on it, and the border is silver.

If you don't say it, absolutely no one can tell from the outside that these are aerospace-grade chips used in spacecraft.

Tang Huacong introduced on the side: "These are the first batch of chip samples produced by our carbon-based production line. They also use a 14-nanometer process. The outer layer is a special anti-radiation package, and the inner layer is also designed for anti-radiation."

"According to our calculations, compared with the current anti-radiation packaging technology we have mastered, the effect of blocking high-energy particles has increased by four times after the adoption of the new technology..."

Chen Shen knew the performance of the chips in front of him without listening. After all, their theoretical performance was written in black and white on the system.

Generally speaking, the anti-radiation packaging of chips has very limited effect on cosmic radiation, because the abnormal flow of high-energy particles can penetrate the packaging material of the chip and directly enter the home of the chip to do things.

Therefore, the system has also been updated in design and process. Compared with the double insurance of general aerospace chips, a layer of anti-radiation packaging is added, which greatly increases the reliability of the chip.

But this anti-radiation process is not the biggest bright spot.

The biggest highlight is that this chip is a 14nm carbon-based chip.

Although it cuts off part of the performance in the design for safety, so that it will freeze in the last Chinese world.

But even so, the performance of these chips is still comparable to the highest-end chips currently on the market, and even has a small advantage. At least it will not be like other silicon-based chips, as long as the Shenzhou World is opened, it will be stuck directly. PPT.

It is precisely because of this that these chips can undertake the computing needs of the launch ship.

Miniature nuclear reactors, plasma thrusters, and plasma reaction systems cannot be handled by current aerospace-grade chips.

It is also for this reason that Chen Shen did not take a shortcut to replace the original chip with Godson.