Movie black technology

Squeak~

In the laboratory, the mouse, whose neck was pinched by Chen Shen, was still struggling. He didn't put the mouse in the observation box until he finished the phone call.

"Great God, the equipment has been debugged." Zhou Zhuang walked over and said at this time.

"We don't have any problems here." Two other research assistants around said.

Chen Shen said, "Let's start."

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

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

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 like the horn is fixed above the transmitter, it can detect and sense the photoacoustic signal.

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's no problem to call it a photoacoustic signal sensor.

This set of devices arrived fresh yesterday, and this mouse is 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 project progress displayed on the system, and it had already advanced to 16%.

With this progress, the research on laser detection devices and photoacoustic signal receiving devices has actually ended.

What is currently being done is the research on photoacoustic signal analysis algorithms.

This is what surprised him very much.

He thought about it before. The most important thing about this scanner is not the scanner's own hardware, but the algorithm for analyzing the signal.

After receiving the photoacoustic signals, how to process these signals to parse out various information is a university question.

For example, a certain segment of the photoacoustic signal may represent a person's blood type information. As long as this segment of the signal is analyzed by an algorithm, you can know whether the person's blood type is A or B.

But this kind of analysis requires a specific algorithm. Without this algorithm, the received photoacoustic signal is meaningless garbled.

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

The equipment that occupies 16% of the project’s progress has required production processes and performance indicators that have exceeded the current production capacity.

For example, if you want to fully detect a very weak specific photoacoustic signal in a daily situation where there is a lot of noise 15 meters away, you must make a very sensitive photoacoustic signal sensor.

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

The process required for the piezoelectric wafers given in the system is completely different from the current one.

To make this kind of wafers, a series of problems such as raw materials, processes, and production machines must be solved from the source.

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

To make the sensors required by the system, he must either develop himself or entrust someone to develop a new photoacoustic sensor production line for manufacturing, or he must find a way for Dasheng Industry.

Of the two ideas, seeking help from Dasheng Industrial is obviously the best choice.

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

Otherwise, he should still be worried about the equipment.

Now this set of equipment is manufactured after Dasheng Industrial has tried its best. Generally speaking, the size has not yet reached the system requirements, but the overall performance is almost the same.

Back to the laboratory.

After a while, the little white mouse in the observation box was tied up by the big five flowers, and could only squeak and scream in the box.

Chen Shen and Zhou Zhuang sealed its mouth, and at this time they all exited the experimental area and went to the outside monitor.

Here you can use a computer to control the switch of the device, and you can also use a digital oscilloscope to see the image of the photoacoustic signal sensed by the photoacoustic sensor.

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

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

"Let's start." Chen Shen said.

"Good." Zhou Zhuang pressed the start button.

Chen Shen and the other two research assistants both looked at the experiment room.

The laser scanner operation indicator on the robotic arm suddenly flashed a few times quickly...

After that, nothing seemed to change.

The white mouse tied to the board is still struggling.

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

The wavelength of these pulsed lasers is 1550nm. This wavelength is easily absorbed by water, so it generally does not cause damage to humans and organisms.

"What happened?" an assistant asked.

For the photoacoustic scanner in the experimental area, they did not know the specific performance. Chen Shen directly submitted the drawings for this equipment, and they did not participate at all.

But 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 signal reception.

And this kind of ultrasonic waves emitted from the inside of living beings must be many times weaker than the signal above.

They feel that the experiment will not go too smoothly.

But in the next second...

"The signal was 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 waves fluctuate greatly, continuously forming peaks and troughs.

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

They really did not expect the signal reception to be so smooth.

"This should be the photoacoustic signal."

Chen Shen could only stare at these signals and data.

If you want to parse out the images and information inside the mouse from these data, you cannot do it without a specific algorithm.

This is not something that the algorithm in the system can do. The algorithm in the system is just a human algorithm. He wants to deduce the internal physical condition of the mouse based on the photoacoustic signal and needs to build another white mouse algorithm.

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

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

"Save the signal data. Let's analyze the data first. The signal received by the sensor may not be completely correct." Chen Shen said to Zhouzhuang.

He is not blindly optimistic.

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

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

He also didn't expect that the scanner concept proposed by Chen Shen before sounded incredible, but he actually took the first step so quickly.