Hand rubbing nuclear fusion live in the wilderness

Chapter 449 Brain Wave Signal Sensor
Won doesn't know whether the answer obtained from knowledge information is right or wrong.

This is the first time he has doubts about the knowledge passed by the system.

From knowledge information, he knows that a person's thinking controls his actions, and actions affect time, interrelated and produce chain reactions.

The speed of thinking is directly proportional to the time, the faster the thinking speed, the shorter the time.

This means that the speed of thought will have a huge impact on the 'digital world'.

A person puts on a VR helmet and enters the digital world. In Won's understanding, it should be precisely the person's senses + thinking that have entered the digital world.

But the human body is in reality.

In this way, the digital world is like a small world embedded in the real world.

Normally, its time lapse is the same as reality.

But if there is a person whose thinking enters this digital world, it happens that this person's thinking speed is twice as fast as the normal passage of time.

Does this mean that the person has spent two hours in the mental world but only one hour in reality?
It's like when a person is drowning, as the body sinks to the bottom of the water, he will feel that time is passing very slowly. He will recall the fragments of his past life, and then he will finish talking, as if it took more than ten seconds to sink. The bottom is the same, but in fact it is just a matter of two or three seconds.

Or, like in a TV movie, when a person is about to die, his whole life or various nostalgic times will flash in his mind, which is extremely long in the eyes of the person who is about to die.

In the eyes of outsiders, it may only be a few seconds.

Maybe this is the difference between the speed of thinking and the speed of time passing?

Han Yuan doesn't know whether this idea is right or wrong, but he can try to verify it.

He has Pokin in his hand, he also has an artificial intelligence program in his hand, and even a supercomputer, Yuanchu Lab has one.

With these things, it's almost time to do a simple test of the 'virtual world'.

Of course, this simple test is only a preliminary test and does not have the ability to adjust the time.

What he has to do is first use Pokin to make a 'real' virtual helmet.

The kind that can be used for human brain and computer interaction.

This is the first step.

If the first step is not successful, let alone the latter.

In the laboratory building at the beginning of the Yuan Dynasty, Han Yuan sent Chen Wenbo to smelt wave gold and pure copper together with the help of the industrial equipment inside to smelt wave copper alloy.

The smelting of Polish copper alloy is not difficult, it can even be said to be very simple, the most difficult part is mainly the ratio of the two.

This is the most critical and difficult part.

The ratio of the two determines the sensitivity and accuracy of the final wave copper alloy to brain waves.

There is a difference of [-]% in the ratio, and in fact the smelted alloy will have a great difference in the induction sensitivity.

So the ratio is the most important thing.

But after knowing the ratio of the two, an ordinary alloy smelter can produce large quantities.

With the help of the crucible and some instruments and equipment in the experimental building, Han Yuan successfully produced the Polish copper alloy.

Part of the wave copper alloy produced by smelting is poured into thin sheets with an area of ​​only four square centimeters in a vacuum chamber.

These thin sheets are formed brain wave sensing materials, which are attached near the brain and can sense the weak brain waves emitted by brain cell activity.

The induced weak brain waves can be transmitted to the 'signal converter' through wires, and then converted into electrical signals.

The converted electrical signal can then be read by a computer.

Of course, for a computer to read and use these electrical signals, a corresponding brain wave signal map is required.

That is to say, it is necessary to know what these electrical signals correspond to what the human brain is thinking.

And drawing such a pair of brain wave signal maps requires a large amount of engineering, which is no less than genetic engineering.

However, this point is relatively easy to solve the problem.

Human beings' research on their own brain waves is actually quite early.

As early as 1857, a young physiological scientist in the country where the sun never sets recorded EEG activity in rabbit brains and monkey brains, but it did not attract much attention at the time.

It wasn't until 1924 that Berger, a German psychiatrist, saw the electric eel emitting electricity and believed that the same phenomenon must exist in human beings, so he really recorded the brain waves of the human brain, and the human EEG was born. .

And this also allows people to begin to understand their own brains and the source of brain waves.

EEG is actually a method of recording brain activity using electrophysiological indicators.

It is formed by the sum of the synchronous post-synaptic potentials of a large number of neurons when the brain is active. It records the electric wave changes during brain activity and is the overall reflection of the electrophysiological activities of brain nerve cells on the surface of the cerebral cortex or scalp.

The research team at the University of California, San Francisco translated human brainwaves into English sentences with a minimum average error rate of only 3%.

Similar studies have also been conducted in China.

Although the frequency of brain waves emitted by each person is different due to the different structure of the brain, in general, the waveforms and frequencies of brain waves that express human emotions, thoughts, control, etc. are similar and within a certain range .

This gives the possibility to read brainwave signals and translate them.

As for the data on the brain wave signal map, Won has asked Yuanchu Lab to come over.

The wave copper alloy sheet that reads the brain wave signal has been manufactured, and the next step is to manufacture the 'signal converter'.

The use of wave copper alloy to read and sense brain wave signals is actually somewhat different from modern brain wave sensors.

In the eyes of modern scientists, brain waves are electrical signals generated by the activity between neurons.

To read these electrical signals, electrodes are most commonly placed on a person's scalp.

After reading the electrical signals sent by the brain, and then amplified by electronic instruments, these electrical signal genes can draw wavy stripes on paper or display them with an oscilloscope, thereby recording the changes in electrical waves during brain activity, just like an electrocardiogram.

The wave copper alloy is different. The wave copper alloy senses the electromagnetic waves and electrical signals emitted by the brain during activity.

Most people know that light is a kind of electromagnetic wave, which has the characteristics of wave-particle duality and constant speed of light.

But for ordinary people, few people really understand electromagnetic waves.

In fact, electromagnetic waves are everywhere. All objects above absolute zero will emit electromagnetic waves, and the higher the temperature, the higher the frequency and shorter the wavelength of the emitted electromagnetic waves.

It can be understood that everything in the world emits electromagnetic waves.

People, animals, plants, microorganisms, and even soil, rocks, and water flow all emit electromagnetic waves.

Just as people have been living in the air but eyes cannot see the air, in addition to light waves, people cannot see other electromagnetic waves that are ubiquitous.

And this invisible electromagnetic wave is called 'black body radiation'.

A very important attribute of electromagnetic waves is 'frequency', which determines various properties of electromagnetic waves.

The wave copper alloy is very sensitive to biological electromagnetic waves, so it can read brain waves.

At this point, some people may ask, since the wave copper alloy is very sensitive to electromagnetic waves and electrical signals, isn't it also very easy to be disturbed?

After all, everything in the world is emitting electromagnetic waves, so how can we tell whether this electromagnetic wave belongs to the brain or something else?

This is the second characteristic of wave copper alloy.

In addition to being susceptible to electromagnetic waves, it is also susceptible to electrical signals emitted by the brain.

Through bio-electromagnetic waves and bio-electrical signals, it is possible to determine which electromagnetic waves are emitted by the human brain.

This is something that human beings cannot do with current technology.

Not to mention the current technology of human beings, even he, without Pojin, can't accurately locate which electromagnetic waves are emitted by the human brain and which ones are not.

In the absence of Bojin, the only way to achieve accurate determination is probably to use supercomputers.

First record all the types and frequency bands of electromagnetic waves emitted by the brain to form a brain signal library.

Then when reading, it receives and senses all the electromagnetic waves, and then sends these electromagnetic waves to the supercomputer for comparison to determine which part is emitted by the brain and which part is not.

This should be the only way to go.

But using this method to read the electromagnetic waves of the brain is too expensive and troublesome.

After all, there are too many interferences from the outside world. It can even be said that when the brain sends out an electromagnetic wave, ten or even hundreds of interference waves may be received together.

In contrast, the wave copper alloy only needs a "signal converter" to accurately determine the electromagnetic wave, which is not too simple.

The manufacture of 'signal converter' is not difficult, and the principle of converting electromagnetic waves carrying information into electrical signals is the same.

The main principle is divided into two parts.

The first part is the loading of the electromagnetic wave signal, called 'modulation'.

The second part is to take out the signal and is called 'demodulation'.

There are many ways of modulation and demodulation, such as frequency modulation, amplitude modulation, phase modulation and keyed pulse modulation, and many other single or composite modulation methods.

Compared with the traditional electromagnetic signal converter, the principle of the signal converter applied to the wave copper alloy is the same, the difference is that the materials used for some main parts are somewhat different.

A conventional electromagnetic signal converter mainly includes two parts: a sensor and a converter.

The sensor converts the electromagnetic flow flowing through the medium into an induced potential, and then the induced potential is converted into a signal by the converter for output display or control.

Its main body is divided into two major parts.

The first part is the conductor and the shell, the main function is to guide the electromagnetic wave and electrical signal and isolate the interference of the external environment.

This is structural stuff.

The second part is the magnetic circuit system and the conversion core, which is used to convert the induced electromagnetic wave, amplify the converted electrical signal and convert it into a unified standard signal.

The first part can be fabricated using conventional ferromagnetic materials.

The second part is different from the materials used in traditional electromagnetic signal converters, and it requires the use of two special materials.

One is wave copper alloy.

The other is the sensitive magnetic wire.

The main purpose of both materials is to ensure that the electromagnetic wave signal and electrical signal in the signal converter can be read accurately.

It is not difficult for Won to make a signal converter. There are all kinds of materials and equipment in Yuanchu's laboratory.

Including all kinds of equipment and materials that he has produced in live broadcasts before, such as MSC-CNC eight-axis six-linkage CNC processing equipment, magnetic sensitive wires, β-sensitive magnetic wires, and the like.

These things are all collected by Won.

The researchers in the Yuanchu laboratory usually don't use these, and they are piled up in unused floors and various rooms.

Fortunately, the number of floors and the area of ​​the building are quite large, and it can be accommodated.

For South Korean won, having these industrial equipment and materials is tantamount to owning a 'base' in reality.

Using familiar industrial equipment and spending more than a day, Won manufactured the first 'signal converter'.

For him, it's not very complicated, and it doesn't take long.

The small signal converter is not big, about the size of an ordinary grown man's thumb.

The surface is silvery white, with two ports exposed at both ends, one of which is connected to a slender metal wire, and the metal wire is divided into two branches, each of which is connected with a piece of 'copper alloy sheet'.

The interface on the other end is used to connect to a computer.

In addition, in this small signal converter, there is also a small power supply system with a built-in lithium-sulfur battery for the power supply of the signal converter.

This is the most primitive version of the brainwave signal reader, a temporary version, but the material used to make it is the key.

In the case of having materials, equipment and knowing the manufacturing process, an ordinary person can manufacture it a few more times.

The structure of this little thing is not complicated, and the function is very simple. At present, it cannot do human-computer interaction.

Brain wave signals can only be read in one direction and transmitted to the computer.

If the human-computer interaction is to be realized, there is still a lot of work to be done in the follow-up.

With this little thing, Han Yuan left the Yuanchu laboratory and came to another 'base'.

This was built by someone else. It contained a small supercomputer and some other equipment, and it was not in the same place as the Yuanchu laboratory.

The various scientific and technological materials he handed over to the Yuanchu laboratory were compiled here, because the base as a whole is not connected to the Internet, so there is no need to worry about information leakage.

Not many people know about this base, so far, only he knows.

After passing the security verification, the Korean won entered the base.

Turning on the lights, he wanted to turn on the small supercomputer, let it start, and then found a motorcycle helmet, disassembled it, and then fused the brain wave signal reader into the motorcycle helmet.

The thumb-length signal converter is sandwiched in the helmet interlayer, and two wave copper alloy sheets are distributed on both sides.

In this way, an extremely simple brain wave signal reader is completed.

(End of this chapter)