Great Country Academician

Chapter 910 The terrifying performance and problems of the bionic robotic arm~

Jinling.

At the entrance of the experimental building of the clinical medicine center of the Hexi branch of the First Hospital.

Xu Xiao and the dean of the Hexi branch of the First Hospital were standing at the stairs waiting. After a while, a Hongqi sedan drove over from the distant intersection.

Seeing this familiar car, Xu Xiao's eyes lit up and he walked over quickly.

"Brother!"

Pushing the cart to open the door, Xu Chuan just walked down and heard a familiar voice in his ears.

With a smile on his face, he looked over. Xu Xiao, who was wearing a medical white coat, was swinging his ponytail. He hadn't seen him for more than a month. His face was much thinner and had some dark circles under his eyes.

"You've lost a little weight. Have you been staying up late recently?" Looking at his sister, Xu Chuan asked with a smile.

Xu Xiao: "You have to stay up late. The sooner the brain-computer interface technology is solved, the disabled people can return to normal life one day earlier."

Xu Chuan smiled and was about to tease when another voice came to his ears.

"Academician Xu, welcome, welcome to the First Hospital to guide research work."

A middle-aged man came up with a smile on his face and extended his hands enthusiastically at the cement steps.

Aside, Xu Xiao smiled and helped to explain: "This is Director Cao Hongsheng of Jinling First Hospital. The cooperative clinical research between Starlight Brain-Computer Interface Technology and the First Hospital was promoted by Director Cao."

Xu Chuan smiled and extended his hand, shook hands with Director Cao, and said: "Hello, Director Cao, I am sorry to trouble you with Xu Xiao's research."

Cao Hongsheng smiled and said quickly: "No trouble, no trouble, this is not a trouble, it is a pure honor for our hospital to cooperate in scientific and technological research in this cutting-edge field. It is Xu Xiao who takes care of us."

After a few pleasantries at the door, Xu Chuan was not prepared to waste time. He looked at Xu Xiao and said: "I have taken a general look at the experimental data on the way here. Now take me to see your clinical experimental research."

Xu Xiao nodded, turned around and led the way into the building.

Taking the elevator, the group arrived on the seventh floor of the Clinical Research Center Building.

After passing through the corridor, they entered a room inside the research center that looked not much different from a ward. There were two middle-aged men who volunteered to undergo the experiment.

Xu Chuan took a glance and found that both of them were typical disabled people.

The difference was that one of them was missing his right leg, which was nearly half of his thigh, and even his knee was missing.

The other was missing his left hand, which was amputated near the elbow joint.

The same thing was that the two people who had lost their limbs had undergone surgery and were equipped with silver-white simulation prostheses.

However, perhaps considering that clinical trials are currently being conducted, neither the right leg prosthesis nor the left hand prosthesis is covered with bionic skin, and the various parts and pipelines on the robotic arm are clearly visible.

This is to facilitate various debugging work during the clinical trial.

Seeing a group of people proceeding, the middle-aged man who was missing his left arm stood up and walked over among the two middle-aged men who were undergoing the experiment in the room.

"Expert, my arm always feels a little trembling and swollen when I control it. Does this kind of experiment really have no effect on the body?"

As he said this, he also touched the back of his head with his right hand. Although he couldn't touch it with his hands and didn't feel anything unusual, he always felt uncomfortable because there was something extra in his brain.

After all, for a farmer like him, it is always unsettling to plant something that doesn't belong to him in a place like the brain where a hit could kill someone.

Especially after the transplant of the left hand prosthesis, although he could control it, he twitched and trembled from time to time and did some movements he had never thought of, but the prosthesis did it by itself, which made him a little flustered.

Xu Xiao walked over, rolled up half of the sleeve on the other person's arm, carefully observed the interface between the transplanted bionic prosthesis and the arm itself, pressed the skin, and smiled and comforted after confirming that there was no problem.

"Don't worry, the transplanted part has recovered very well."

"We use the best bionic materials, which can be well integrated with human skin and bones. At present, the bionic skin and materials have grown and healed with your own arm tissue."

"As for the occasional twitching and other movements during use, these are currently normal."

"After all, this new technology still needs to be continuously optimized. Don't worry, although there are still some minor problems in use, I can guarantee that the transplanted bionic mechanical arm and brain-computer chip will not cause other effects on your health."

Xu Xiao explained patiently. She actually said these words more than once or twice.

However, facing the two patients participating in the clinical trial, she still maintained a gentle and patient attitude.

After explaining with a smile, Xu Xiao pulled Xu Chuan out from behind, pushed him in front of the patient who was undergoing the clinical trial, and said with a smile.

"If you don't believe me, then you should know him. Academician Xu Chuan, who used to appear on TV."

Looking at Xu Chuan, the middle-aged farmer grinned with excitement and said, "I know this great scientist. I saw him on TV before. He said he discovered some fusion technology. Now that electricity bills have dropped, my family can save more than a thousand yuan a year."

Xu Xiao smiled and said: "He came here specifically to deal with problems with the bionic robotic arm you transplanted."

"Don't worry. After a while, your arms and calves will become the same as your original arms and thighs. You can use them normally, live a normal life, and work normally."

Hearing this, the middle-aged man's face was full of smiles, he couldn't help nodding and laughing: "That's a good relationship, that's a good relationship, I'm sorry to trouble you, experts, thank you, great scientist."

Xu Chuan smiled and greeted the middle-aged man who was undergoing clinical experiments with a smile. After pretending to help check the condition of the transplanted arm, he smiled and changed what Xu Xiao had said into a new set of words. Again.

On the side, Xu Xiao smiled and said: "You two, follow me, now go to the clinical trial center."

"This time Academician Xu is here to see the experimental conditions of these bionic robotic arms. We have to go through the experimental process normally according to the previous experimental process."

With that said, she took the lead and walked out of the room. Xu Chuan did not move for the moment, and his eyes fell on the two disabled men who were receiving and sending brain-computer interface + bionics robotic arm clinical experiments.

Of course, the main focus fell on another experimenter who had lost his right leg, observing the walking condition of his prosthetic right leg.

Although it is said that because there is no bionic skin wrapped around it, this bionic mechanical leg looks a bit out of place.

But walking is not a big problem.

Whether it is bending the knees, raising the legs, or landing the heels and then the entire foot touches the bottom, these ordinary walking postures are almost perfectly achieved.

On the side, Zheng Hai squinted for a while and then said: "This comrade who lost his right leg should have come out of the army, and he should have been discharged not long ago."

Hearing this, Xu Chuan looked at him in surprise and asked curiously: "How do you know?"

Zheng Hai smiled and said, "Temperament and walking posture."

"Although it looks a little different due to the mechanical leg installed on it, I can't mistake this feeling."

"A farmer, a soldier."

Xu Chuan smiled and said, "The clinical experimenters she selected are quite interesting."

Zheng Hai was noncommittal and asked, "This kind of mechanical leg shouldn't be cheap, right?"

Xu Chuan: "The cost should exceed one million. This is clinical experimental equipment with the most detailed functions."

After Musk bought back the Neuralink brain-computer interface company, it merged with the 'Starlight Virtual Technology Company' that he helped Xu Xiao open before.

Although the specific cost of this bionic robotic arm is not clear, it is definitely worth a lot of money.

Hearing the price, Zheng Hai frowned and said, "If that's the case, I'm afraid many people can't afford it."

Xu Chuan smiled, followed the leaving experimental team, and said, "Every new technology is expensive when it first appears."

"Just like mobile phones and computers, when they first appeared, not many people could afford them."

"But with the development of the times, isn't it true that almost everyone now has a mobile phone and a computer? Take your time, don't rush."

The clinical laboratory is located on the other side of the seventh floor.

When Xu Chuan followed, Xu Xiao and related researchers were already making various preparations.

After waiting for a while, a scientific researcher in a white coat took Xu Xiao's place and walked over with a recording board in his hand.

"Today's experiment is the same as before. Which of you will come first?"

Hearing this, in the laboratory, another middle-aged man who had lost his right leg raised his hand and said, "I'll do it first."

Following the voice, Xu Chuan looked over.

This laboratory is quite large and contains various experimental equipment.

With the help of the staff, the soldier who came out of the army quickly put on various sensor data devices.

Walking, jogging, running fast, squatting, squatting on one leg, standing on one leg. Sitting, lying, weight-bearing. Quick reaction, flexibility.

A series of basic lower limb functional tests are being conducted in the laboratory.

Standing in the laboratory, Xu Chuan observed the activities of the clinical experimenter with interest.

On the side, Xu Xiao softly explained: "For bionic manipulators, these basic tests can be mainly divided into motion range, speed performance, acceleration performance, position repeatability accuracy, path tracking accuracy, collision detection, and load performance testing. Wait for seventeen categories.”

"Beyond that, there are some other optional tests."

"For example, force control testing, modal analysis, disturbance suppression, environmental adaptation testing, battery life, etc."

"The combination of basic tests and optional tests can make a comprehensive evaluation of the bionic robotic arm and the control system, power supply system and other systems of the brain-computer chip. Both overall performance and reliability can be completed in these tests. "

Xu Chuan asked curiously: "How many test items are there in total?"

Xu Xiao thought for a moment and replied: "There are fifty-six basic tests and optional tests in total."

"In addition, there are regulations for material stiffness testing, protection level testing, safety leakage inspections, etc. It all adds up."

"Well, if we start with materials, there may be more than a hundred items."

On the side, Zheng Hai, who had been silently watching the experiment, suddenly asked: "Can I ask, what is the maximum load of this bionic mechanical leg?"

Xu Xiao replied without thinking: "The current critical load test for the mechanical leg is 573 kilograms. The single-leg load was obtained in an independent experiment, that is, an experiment without surgical insertion into the human body."

"Exceeding this load, the knee joint material will be damaged to a certain extent. If the load is exceeded, the material at the connection will be directly cracked, deformed, damaged, etc."

"As for the experimental tests that have been connected to the human body, considering the bone strength of the experimenters, we have only conducted load tests below 150 kilograms."

"To put it simply, when a bionic mechanical leg is used to stand on one leg, with the assistance of other equipment, it can bear a load of less than 150 kilograms and squat and stand up while bearing the weight of the human body itself. Waiting activities.”

"Is there any problem? Brother Zheng."

Zheng Hai thought for a while and said: "The operation of the mechanical legs requires external energy or electrical energy, right? For example, a battery? How long can it last?"

The critical load of a single body test is more than 500 kilograms, and the human body test of a single leg exceeds 150 kilograms. Adding the weight of an adult man, the load is at least more than 250 kilograms. If there are no restrictions on this mechanical leg, The performance is a bit exaggerated.

Xu Xiao nodded and said: "Of course, this kind of bionic device is controlled by converting brain nerve signals into electrical signals. It definitely needs external energy to support its movement. Otherwise, where does the energy come from?"

After a pause, she looked at the experimenter who was conducting the test, and then said: "Currently we are using two lithium-sulfur batteries as energy supply. Under normal activities, the arm can last for about 15 hours."

"Because the thighs bear more weight and require higher energy supply, they can only last about 8 hours."

"But it's quite convenient to replace the battery."

Xu Chuan glanced at Zheng Hai and asked curiously: "Do you have any ideas?"

Zheng Hai was silent for a moment, nodded and said: "There are indeed some, but let's wait until the test is completed."

Hearing this, Xu Chuan didn't think much. He turned his head and looked at the patients undergoing clinical experiments, observing them carefully.

Soon, the problem Xu Xiao had mentioned before appeared in this test experiment.

In the laboratory, a collision detection test is ongoing, which is an experiment in which the collision conditions of the robotic arm are artificially set to test whether the collision detection function is normal.

Something strange happened to the installed mechanical leg. When it was avoiding the foam stick swept out from the test equipment, its output was so great that the moment balance between the two legs was instantly broken.

Under the feedback of the mechanical leg, the soldier who underwent the experiment flew out crookedly and fell to the ground as if jumping on one leg.

Seeing this scene, the staff on standby immediately went up and turned off the equipment, and then helped him up.

Xu Xiao pursed her lips, sighed and said, "This is one of the problems I mentioned before. During activities, the signals transmitted from the brain-computer interface chip to the bionic robotic arm will be abnormal."

"Sometimes it may be enlarged, and sometimes it may be reduced, which will cause an imbalance in the originally normal movement."

"Just like Jiang Yu just now, under the force of the uncontrolled mechanical legs, the whole person was pushed to 'fly' and lost his balance."

"This kind of problem occurs at uneven times, but the probability is quite high. This is also the problem that worries me the most."