The control signals of intelligent bionic prosthesis mainly include EEG, EMG, nerve signals and other physiological electrical signals and voice signals. Electroencephalography (EEG) control technology is to place electrodes on the scalp of the brain to detect the electrical signals when the human body produces conscious activities, so as to drive the movement of the prosthetic hand. However, due to the characteristics of complex wearing, poor signal quality and less recognizable action modes, the technology is still in the laboratory research stage. Neural control technology uses buried electrodes to guide the neural signals in the body, and controls the action of the prosthesis by processing and recognizing the signals. At present, there are two ways to guide neural signals: one is to detect neural signals through electrodes implanted in the cerebral cortex, the other is to detect neural signals through the stumps of patients. Neural control technology has a strong theoretical support, but in practice, it is still in the stage of laboratory research and discussion because of the high risk of surgery and the body's rejection of electrodes. Speech signals control technology is to obtain human voice instructions through the speech recognition equipment placed on the human body, so as to drive the action of the prosthetic hand. At present, there are two main ways to control the voice of prosthetic hand, one is to collect the surface EMG signal placed on the laryngeal electrode, the other is to recognize the human voice directly. Although speech recognition technology has been very mature, but using speech alone for control does not meet the intelligent requirements of human mind control prosthesis, it is a non habitual control method.<br>
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