IT House reported on 10 on 0 that at the 3rd Global Assistive Technology Olympics (also known as the "Cyborg Bionic Olympics") held in 0 0 years, player Xu Min wore a domestic prosthetic leg and successfully won China's first upper limb gold medal in the history of the Bionic Olympics.

央視財經今日發文，對徐敏佩戴的這款義肢進行介紹，這款義肢成本不足萬元, but can not only pick up a 1-pound vegetable basket, but also pinch 0 cm long studsBehind this is the "post-90" doctor Hu Xuhui's team and Xu Min of Southeast University and Suzhou Institute of Biomedical Engineering and Technology, Chinese Academy of Sciences.

According to Dr. Hu Xuhui, the R&D team attached a pair of electrodes to the skin of Xu Min's severed forearm, which interpreted and identified the electromyography signals of the residual limb, and then connected them to the prosthesis to drive the prosthetic movement.

IT Home noticed that the corresponding team also tailored a wearable shoulder strap for Xu Min to ensure reliable linkage between his fingers and wrists, and the corresponding shoulder strap has a stretch sensor to monitor the shoulder movement status of Xu Min when he arches his back, and cooperates with the electromyography signal obtained by the residual limb to control the opening and closing angle of the fingers and the rotation angle of the wrist joint.The greater the arch back angle, the greater the displacement of the shoulders and the greater the finger opening。 Vice versa.

In addition, the team implanted a force tactile sensor on the finger of the prosthetic to detect the magnitude and distribution of the prosthetic grasping force when grasping an object.Signals can be transmitted to the arm through vibrational stimulation。 If the gripping force is greater, the vibration stimulus will be stronger, and the player can decide how much force to apply according to the intensity of the vibration.

Dr. Hu Xuhui said that in the corresponding bionic Olympic competition, disabled athletes will grasp a variety of objects with their prosthetic hands, but because the signal source for disabled people to control the prosthesis is very limited, it has become a problem to overcome.

To do this, the team set up 4 different grasping zones on the prosthetic fingers. The first functional area is made as horizontal as possible in order to grab straight objects such as paper pieces and medicine spoons, the second functional area is made into an embedded arc shape so that it can hold items such as hammers and bottles, the third functional area is made into a hemispherical surface, which can grasp round objects such as beads, and the fourth functional area is arranged at the two joints of the fingers to facilitate the fixation of the object position when carrying weight-bearing actions such as carrying a water bottle.

In the competition, there is an event similar to "opening a blind box", in which the prosthetic limb is passed through a covered brush to grasp cylinders of different hardness without being visible to the naked eye. In order to give the prosthetic limb an eye, the team installed a camera in the finger of the prosthetic leg, and through visual recognition technology, the captured image signal was converted into a light signal to assist Xu Min in completing the grasping.It also made her the only player in all the participating teams to complete this task。