Su Yuhang pressed the button.
The black screen of the electronic watch lit up. Su Yuhang also felt a clear tightening feeling from the connection of the bionic hand.
The stump of his wrist was connected to the bionic hand even tighter.
His mother quickly asked how he felt.
"I don't know …" Su Yuhang was so nervous that his wrist was trembling.
During his stay in the hospital, his mood had changed from the initial unacceptable to the current complete despair. Now, Su Yuhang looked at his right arm. There was an avant-garde electronic watch there. It just covered the bionic hand and the edge of the connection to his wrist that was not easy to detect.
Everything was just like before the car accident. His right hand was intact.
However, he could no longer feel the existence of his right hand.
"Now that the bionic hand has been activated, you can try to hold it." Ye Qing had an extra tablet in his hand. It displayed the current working parameters of the bionic hand and the information received by the sensor patch.
Su Yuhang was stunned for more than ten seconds. When beads of sweat faintly appeared on his forehead, he choked out, "I don't know how to hold it …"
Jiang Shuya was also highly nervous. After realizing that Su Yuhang had not undergone professional electromyographic prosthetic operation training, she quickly said, "Yuhang, didn't you tell me a few days ago that even though you lost your right hand, you often felt pain in your right hand in your mind?"
"This situation is called phantom limb pain. It is a passive functional reorganization of the nerve at the end of the hand and the cerebral cortex when the right hand is suddenly lost."
"The pain will gradually disappear over time, but the longer it lasts, the more the nerves will forget the control of the right hand."
"Yuhang, close your eyes now and don't look at your right hand. Recall how you opened and clenched your right hand in the past. Redo it in your mind. "
Su Yuhang quickly closed his eyes.
However, within a few seconds, he was awakened by his mother's scream.
His right hand moved. It was as if he had unconsciously loosened it in his sleep and quickly clenched it again.
Of course, Su Yuhang was aware of it. Even if he was unconscious, the visual scene made his eyes fill with tears.
"That's the feeling. Keep your eyes open and keep trying," Jiang Shuya encouraged.
Young people were usually very smart, and Su Yuhang quickly mastered the technique of commanding the bionic hand.
By imagining the right hand moving, the nerves and muscles at the end of the stump would naturally release movement signals. These signals were captured by the sensor patch and transcoded into digital signals to drive the bionic hand to work.
Theoretically speaking, the shorter the time since the loss of the right hand, the stronger the motion signal released by the stump.
This was because at this stage, the corresponding nerves and muscles had yet to degenerate.
The bionic hand opened and closed. Su Yuhang's excitement was even stronger than when he first saw Ye Qing.
His parents' eyes were brimming with tears. In their eyes, even though the bionic hand could only open and close, they couldn't find any traces of mechanical movement. There was no sound, nor was there a sense of frame dropping.
They could guarantee that as long as Su Yuhang wore this bionic hand, he wouldn't receive any curious stares from passersby.
Ye Qing looked at the data sent back from the tablet computer the whole time. Seeing that Su Yuhang could already skillfully grasp the opening and closing of his right hand, he was satisfied and let him try to grab an object.
There were all kinds of exercise items in the prosthetic installation center, from the most common water cups to switches that required knobs to more complicated buttons on clothes.
Su Yuhang staggered to the side and stretched out his bionic right hand to the cup on the coffee table.
There was tea in the cup that had just been brewed, and the bionic right hand firmly grasped the cup. Putting down the cup, his confidence was greatly boosted, and he reached for a very common air conditioner knob switch.
He didn't expect that the limitation of the sensor patch would appear.
He clearly wanted to stretch out his thumb, thumb, and index finger to pinch the knob. But when it was converted into an actual action, it was the action of grabbing the cup. The bionic right hand opened and held the knob.
Su Yuhang tried again, and then stood in place in a daze.
"This action can be done." Jiang Shuya went around behind him and said softly, "Take Otto Bock's product for example, it can perform more than 30 different finger linkage actions, corresponding to seven main gesture functions."
"For example, before twisting the knob, the user has to gently tap the little finger and ring finger with the left hand. These two fingers won't be involved in the subsequent movement process. "
"The one you're wearing now may not have added this function."
Su Yuhang was thinking about something and was a little distracted.
Ye Qing looked at the data on the screen and frowned in thought.
The bionic hand composed of thermal neurons was, of course, ten times more advanced than the mechanical movement of Otto Bock. However, using the same sensor patch technology, no matter how advanced the bionic hand was, it could only perform the same action as the latter on the patient's body.
Of course, this was not what Ye Qing wanted.
The interior of this pair of bionic hands integrated various micro-sensor technologies transplanted from the Watchman X-type robot.
Otto Bock had always liked to brag about its three-dimensional force sensor, but in this pair of bionic hands from Monster Industries, the six-dimensional force sensor was only a very low-level configuration.
The problem was that these configurations could not help the user make the posture they wanted.
Ye Qing waved at Jiang Shuya, and the latter asked, "What are you doing?"
"I think the problem is with the sensor patch."
Ye Qing pointed at the data that had just been collected on the screen. "Just now, Yuhang wanted to make the three-fingered knob action. The bioelectric signals released by his muscles and nerves were clearly different from the signals when he wanted to hold the object. But the sensor patch still processed it into the simplest opening of the hand and then holding the hand. "
"It can't handle the complicated ones." Jiang Shuya took a deep breath and whispered, "Grasping objects is the most used function of the hand in life. Some of the domestic robotic hands that are worth thousands of yuan only have this function. "
"Otto Bock's kind is mainly advanced in sensors and function expansion. Its fingers are more flexible, and the wrist can be rotated. It can touch the mechanical fingers with the other hand to activate more complicated movements. "
"Why can't it be handled?" Ye Qing interrupted, "I've removed this sensor patch. It uses metal electrodes to sense muscle movement signals. In theory, it should be able to sense biological voltage changes in the order of microvolts through signal amplification. "
"If you are afraid of the signal interference of electronic equipment in life, you can isolate it through a sports wrist guard with a shielding layer or something else."
Jiang Shuya looked at Ye Qing innocently. She did not understand.
"Do you have an Otto Bock technician here? Let him come over."
"Yes, but …" Jiang Shuya quickly shook her head.
The prosthetic experimental center was originally invested and built by Otto Bock. One of the three people in charge of it was an expatriate from Otto Bock.
However, Jiang Shuya did not inform Otto Bock about this meeting.
She was mainly worried about Otto Bock. She wanted to talk to Ye Qing about cooperation, and then the entire hospital's leaders would come over.
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