Movie black technology

squeak~

In the laboratory, the little white mouse that Chen Shen had pinched the back of Fate's neck was still struggling. He didn't put the little white mouse into the observation box until he finished making the phone call.

Master, the equipment has been debugged. At this time, Zhou Zhuang walked over and said.

There is no problem on our side. Two research assistants around said.

Chen Shen said: Then let's start.

In front of the mouse is a whole set of photoacoustic scanners.

It mainly consists of a laser scanner, a photoacoustic signal sensor, and an external display.

Among them, the laser scanner is a black square box, which is fixed on the observation box of the mouse by a mechanical arm at this time, facing the mouse.

The photoacoustic detector, which is the same as the horn, is fixed above the emitter, which can detect and sense photoacoustic signals.

Because the photoacoustic signal is a special ultrasonic wave, it is also an ultrasonic sensor in essence, which can convert the sensed ultrasonic wave into an electrical signal.

It is also okay to call it a photoacoustic signal sensor.

The set arrived fresh yesterday, and this guinea pig was the first to experience it.

Zhou Zhuang and other assistants grabbed the mouse in the observation box and tied it to a small wooden board in the box for laser scanning later.

Chen Shen glanced at the progress of the project displayed on the system, and it has advanced to 16%.

Under this progress, the research on laser detection devices and photoacoustic signal receiving devices has actually come to an end.

Currently, the research on the photoacoustic signal analysis algorithm is being carried out.

This is what surprised him.

He thought about it wrong before. The most important part of this scanner is not the hardware of the scanner itself, but the algorithm for analyzing the signal.

After receiving photoacoustic signals, how to process these signals to analyze various information is a big question.

For example, a certain section of the photoacoustic signal may represent a person's blood type information. As long as the algorithm is used to analyze this section of the signal, it is possible to know whether the person's blood type is A or B.

But this analysis requires a specific algorithm, without this algorithm, the received photoacoustic signal is meaningless garbled characters.

Of course, the algorithm for analyzing signals is important, but it does not mean that the equipment is not important.

For the equipment that accounts for 16% of the progress of the project, the required production process and performance indicators have exceeded the current production capacity.

For example, if you want to completely detect a very weak specific photoacoustic signal in a daily situation that is fifteen meters away and there is a lot of noise, you must manufacture a photoacoustic signal sensor with extremely high sensitivity.

The most important component inside the sensor is the piezoelectric wafer, which determines the sensitivity of the sensor.

The technology required for the piezoelectric wafer given in the system is completely different from the current era.

To manufacture this kind of wafer, a series of problems such as raw materials, processes, production machines and so on must be solved from the source.

And this is just one of the components, and the other components are no less troublesome than piezoelectric wafers.

If he wants to make the sensor required by the system, he either develops it himself or entrusts someone to develop a new photoacoustic sensor production line for special manufacture, or he finds Dasheng Industry to find a way.

Among the two ideas, it is obviously the best choice to seek help from Dasheng Industry.

So when he saw that the equipment part was finished, he directly sent the drawings to Wang Qian and asked her to think of a way.

Otherwise, he should still be worried about the equipment.

Now this set of equipment is manufactured by Dasheng Industry after trying its best. Generally speaking, the size has not yet met the system requirements, but the overall performance is almost the same.

Back to the lab.

After a while, the mice in the observation box were tied up and could only lie in the box and scream.

The three of Chen Shen and Zhou Zhuang sealed his mouth. At this time, they all exited the experimental area and came to the monitor outside.

Here, the computer can be used to control the switch of the device, and at the same time, the digital oscilloscope can be used to see the image of the photoacoustic signal sensed by the photoacoustic sensor.

Zhouzhuang operated on the computer, and quickly activated the equipment inside.

A robotic arm carrying a laser scanner and a photoacoustic sensor automatically aimed at the mouse.

Let's start. Chen Shen said.

Okay. Zhou Zhuang pressed the start button.

Chen Shen and the other two research assistants looked towards the experimental room.

The laser scanner operation indicator light on the mechanical arm suddenly flashed a few times...

Afterwards, nothing seemed to change.

The little white mouse tied to the board is still struggling.

But Chen Shen knew that just now the laser scanner had fired ten pulses of laser light to scan the mouse in front of him.

The wavelength of these pulsed lasers is 1550nm, and this wavelength is easily absorbed by water, so generally it will not cause damage to the human body and organisms.

How did it turn out? an assistant asked.

As for the photoacoustic scanner in the experimental area, they didn't know the specific performance. Chen Shen directly submitted the blueprint of this equipment, and they didn't participate at all.

However, according to usual experience, the strength of the ultrasonic signal returned from the inside of the organism is already very weak, and an amplifier must be added to ensure the reception of the signal.

And this ultrasonic wave emitted from the inside of the creature must be many times weaker than the signal above.

They had an intuition that the experiment would not go well.

But in the next second...

The signal has been detected! Zhou Zhuang suddenly moved to the front of the oscilloscope excitedly.

I saw that many different waveforms suddenly appeared on the oscilloscope at this time.

These waveforms fluctuate greatly, forming a series of peaks and troughs.

Zhou Zhuang and the other two assistants looked at these fluctuating and dense signals, with expressions of surprise and surprise on their faces.

They really didn't expect the reception of the signal to be so smooth.

This should be the photoacoustic signal.

Chen Shen can only stare at these signals and data now.

It is impossible to analyze the images and information inside the mouse from these data without a specific algorithm.

This is not what the algorithm in the system can do. The algorithm in the system is only a human algorithm. He wants to use the photoacoustic signal to deduce the internal physical condition of the mouse, and he needs to build another algorithm for the mouse.

However, Chen Shen did not intend to use this device to detect mice.

The purpose of today's experiment is to test the equipment, and it seems that this experiment has obviously been very successful.

Let's save all the signal data. Let's roughly analyze the data next. The signal received by the sensor may not be completely correct. Chen Shen said to Zhou Zhuang.

He is not blindly optimistic.

This set of equipment is a substitute provided by Dasheng Industry. It is not manufactured completely according to the design in the system. Although the performance is close after assembly, it does not mean that it will not go wrong.

Wait a minute. Zhou Zhuang backed up the information and handed it to Chen Shen, with surprise on his face.

He also didn't expect that Chen Shen's idea of ​​scanner sounded incredible, but he took the first step so quickly.