Creak~

In the laboratory, the mouse that was pinched by Chen Shen on the back of the neck was still struggling, and it was not until he finished the phone call that he put the mouse in the observation box.

"God, the equipment has been debugged." At this time, Zhou Zhuang came over and said.

"We don't have a problem on our side anymore." There were also two research assistants around.

Chen Shen said, "Then let's start." ”

In front of the guinea pig, there is a complete set of photoacoustic scanners.

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

The laser scanner is a black square box, which is fixed to the mouse's observation box by a robotic arm, facing the mouse.

A photoacoustic detector like a horn is fixed above the transmitter and can detect and sense photoacoustic signals.

Because the photoacoustic signal is a special type of ultrasound, it is essentially an ultrasonic sensor that converts the sensed ultrasonic waves into electrical signals.

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

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

Zhou Zhuang and other assistants grabbed the mice in the observation box and tied them to a small wooden board in the box to facilitate laser scanning later.

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

At this rate, the research on laser detection devices and photoacoustic signal receiving devices has been completed.

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

This was something that surprised him.

He thought about it before, the most important thing about this scanner is not the hardware of the scanner itself, but the algorithm that analyzes the signal.

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

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

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

Of course, the algorithm that parses the signal is important, just because the device is not important.

The equipment, which occupies 16% of the project's schedule, requires production processes and performance indicators that exceed the current production capacity.

For example, if you want to completely detect a very weak specific photoacoustic signal at a distance of 15 meters and there is a lot of noise in a daily situation, it is necessary to manufacture a very sensitive photoacoustic signal sensor.

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

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

In order to create such a chip, it is necessary to solve a series of problems such as raw materials, processes, and production machines from the source.

And that's just one of the components, the others are just as troublesome as piezoelectric chips.

If he wants to make a sensor with system requirements, he either develops it himself or entrusts someone to develop a new photoacoustic sensor production line for special manufacturing, or he is looking for a way to find a way for Dasheng Industry.

Among the two ideas, asking for the help of Dasheng Industry 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 think of a way.

Otherwise, he would still be worried about the equipment.

Now this set of equipment is made after Dasheng Industry tried its best to manufacture, in general, in terms of size, it has not met the requirements of the system, but in terms of overall performance, it has been about the same.

Back to the lab.

After a while, the mice in the observation box were already tied up by Wuhuada, and they could only lie in the box and squeak and scream.

Chen Shen and Zhou Zhuang closed their mouths, and at this time they all exited the experimental area and came to the monitor outside.

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

Zhou Zhuang operated on the computer and quickly activated the equipment inside.

A robotic arm carrying a laser scanner and a photoacoustic sensor automatically aligns with the mice.

"Let's get started." Chen Shen said.

"Okay." Zhou Zhuang pressed the start button.

Chen Shen and the other two research assistants all looked at the lab room.

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

Then, nothing seemed to change.

The mouse strapped to the board is still struggling.

But Chen Shen knew that just now, the laser scanner had already launched ten pulsed lasers to scan the mice in front of him.

These pulsed lasers have a wavelength of 1550nm, which is easily absorbed by water, so they generally do not cause damage to humans and living things.

"How's it going?" An assistant asked.

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

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

And this kind of ultrasound from the inside of the creature must be many times weaker than the signal above.

They intuitively felt that the experiment would not go too well.

But in the next second......

"A signal has been detected!" Zhou Zhuang suddenly leaned in front of the oscilloscope excitedly.

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

These waveforms are extremely undulating, forming peaks and troughs.

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

They really didn't expect the signal to be received so smoothly.

"This should be a light and sound signal."

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

If you want to parse the images and information inside the guinea pig from these data, there is no specific algorithm that can't do it.

This is not what the algorithm in the system can do, the algorithm in the system is only a human algorithm, and he wants to rely on the photoacoustic signal to deduce the internal physical condition of the mice, so he has to build another mouse algorithm.

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

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

"Let's save all the signal data, let's roughly analyze the data first, and the signal received by the sensor may not be completely correct." Chen Shen said to Zhou Zhuang.

He was not blindly optimistic.

This set of equipment is a substitute provided by Dasheng Industries, not completely in accordance with the design of the system to manufacture, although the performance is close after assembly, but it does not mean that there will be no mistakes.

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

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