Poor identification accuracy meant that the range of bioelectric fluctuations was small, and it also meant that the comparison error between the two bioelectric waves was small.
However, here, it could not be judged purely by the percentage.
With high accuracy, although the percentage was large, the data samples she collected were richer. It could cross from microvolts to millivolts, which meant that there were two comparison schemes. It would only have a higher identification rate than Otto Bock's sensor patch.
Ye Qing repeated the action a few more times, and the result was that the error of the bioelectric waves changed every time.
After a total of five times, Ye Qing asked Dian Jing. If the program was intelligently identified, could the program find the key and judge the hand's retraction signal from these bioelectric waves?
"Boss, in these five comparisons, the instrument has collected synchronous bioelectric waves between 32 microvolts and 66 microvolts four times." Dian Jing stood in front of the waveguide and kept pinching her sharp chin. "If a complete bioelectric database is established, I think it can be used as a basis for judgment through vague comparisons."
"But I can't guarantee that this will happen to everyone when they collect data. In addition, the number of samples collected is too few. I think that at least tens of thousands of data comparisons can be more certain. "
"It's not difficult to collect. There are many people in the company."
It seemed that there was no progress, but in fact, Ye Qing felt that there was great progress. As long as the signal of the hand's retraction could be accurately determined, it was equivalent to adding a 2 to the 1. Because all signals that were not 1 could be classified as 2.
"Let's test the bioelectric signal of the hand wave again."
Ye Qing, who had calmed down, began to wave his left and right hands simultaneously.
This action was repeated ten times.
Through comparison, Ye Qing was surprised to find that in these ten movements, ten of them were collected with the same bioelectric wave fragments that could be used to determine the user's own use.
After analysis, Ye Qing and Dian Jing agreed that this judgment came from the bioelectric signal released when the wrist was swung.
Moreover, it was the muscle bioelectric signal released when the wrist muscles were moving. Because it was only active in the microvolt range, it was highly consistent.
"It's promising." Dian Jing looked at the comparison picture and looked at Ye Qing.
"Indeed." Ye Qing nodded with an expression of disbelief that said, "Could it be that simple?"
The signal released by the nerves was 1 for opening and closing the palm, and the signal for anything other than that was 2.
The wrist or arm muscles, when performing certain movements, could be classified as a 3.
Of course, muscles could also generate bioelectric activity during exercise, but it was much smaller than the bioelectric signal released by nerves. Otto Bock's sensor patch couldn't identify it, but the one made by Dian Jing could.
1, 2, 3. Was it that easy to find the train of thought?
"Boss, isn't this too simple? Didn't you say that Otto Bork is the best in the industry in this area? I think this first place is a complete mess. "
"I think so too …"
Ye Qing thought for a moment and said, "In the end, it should be the difference in industrial technology. Perhaps they didn't have the ability to increase the recognition accuracy of the sensor patch by a level. They can detect microvolt changes in biological voltage, but that set of equipment will be very cumbersome. It may be the same as the electrocardiogram recorder in the hospital. "
"In addition, after detecting these subtle changes, whether these changes can be applied to mechanical movements is another problem."
"This is more difficult than the sensor patch. Without our bionic hand movement technology, no matter how good the sensor chip is, it is useless."
"Finally, there is the difficulty of programming."
"How to program these signals into a set of simple and effective control commands is also a problem."
Dian Jing patted its chest and said, "Leave everything to it."
Simple and easy to understand?
This was easy. Dian Jing could build a special control program for the bionic hand. Then, it would activate the super server cluster of the company and the factory, and let the program with a certain degree of intelligence separate all the movements of the human hand. Each movement would be simulated tens of billions of times to find the simplest set of commands.
Bioelectric sample collection?
The factory began to mass produce high-precision sensor patches that night. By the afternoon of the next day, 500 sets of bioelectric collection devices were sent to the company.
Each company employee took two hours a day to sit in a chair, stick a patch on their arm, and make fixed hand movements according to the video over and over again.
They either shook hands, applauded, picked up a teacup, or raised their hands in admiration and disdain.
These data were continuously gathered in the super server cluster. Every person and every gesture would be concentrated and compared.
The data collection work was not smooth sailing, and many unexpected problems occurred in the process.
For example, when the server compared abnormal data and submitted it to Dian Jing for review. Dian Jing looked through the surveillance video and found that the employee was holding the mobile phone in one hand and reading the news in the process of recording the data.
Through repeated experiments, Dian Jing found that when the mobile phone was close to the sensor patch, the electronic components that were working in the mobile phone would release electromagnetic interference, seriously affecting the identification accuracy of the patch.
During the packaging process of the sensor patch on the production line, anti-interference processing had been done, but now it seemed that it was far from enough.
Dian Jing quickly came up with a solution. At present, these sensor patches were exposed during data collection. When placed on the product, it was actually installed on the bionic hand at the connection with the user's residual limb. As long as an electromagnetic shielding layer was added to the outside of the bionic hand, this problem could be solved perfectly.
There were anomalies of data overflow, and there were also anomalies of data greatly weakened.
After investigation, it was found that this data came from a young female employee who had rubbed moisturizer and sunscreen on her arms.
The titanium dioxide and zinc oxide in the sunscreen seriously blocked the transmission of bioelectric signals.
Dian Jing asked the product department to add a note to the user manual that before use, please clean the joint of the limb and do not apply cosmetics.
There were also people who neither played with their mobile phones nor applied cosmetics, but the data had been abnormal.
Dian Jing couldn't find the cause of the problem. Later, it was the employee of the cleaning department who thought of the crux of the problem. She said that she had mild epilepsy. Last year, when she did an electroencephalogram and electromyogram in the hospital, the doctor said that her nerve discharge was abnormal.
There were many similar problems.
But every time, Dian Jing was always able to quickly come up with a solution.
In addition, the hardware changes in the second-generation bionic hand were also great.
Dian Jing added a processor system similar to the magic crystal mobile phone inside the second-generation bionic hand.
The user could connect through the mobile phone and customize the operation command. The system of the bionic hand could also be upgraded through the mobile phone at any time.
The connection with the residual limb was also doubled in length, so that the connection between the bionic hand and the user was stronger.
Tianjin also collected the nerve signals returned by the palms of the employees when they were in contact with various objects. It tried to feed these signals back to the end of the user's residual limb through another nerve feedback patch of the bionic hand, so that the user could experience the tactile sensation brought by the real palm.
At present, this system was not perfect and could only simulate 30% of the tactile sensation, which was more like a numbing sensation.
However, Dian Jing felt that it could give the user a collection chip and let them stick it to other parts of their body to collect tactile signals, and then tailor it to each person's exclusive tactile sensation.
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