Surface myoelectricity man-machine interface system based on visual stimulation interface and control method thereof

Abstract

The invention discloses a surface myoelectricity man-machine interface system based on a visual stimulation interface, which comprises a visual stimulation unit, a surface myoelectricity signal acquisition unit, a central processing unit and an environment control unit. The visual stimulation unit is based on a man-machine interface single-character stimulation mode and is composed of several characters, each character corresponds to a control instruction executed by the environment control unit; the characters flicker in sequence according to a random sequence, only one character flickers atthe same time, and when all the characters flicker once to form a round, each character in each round can flicker only once, the user synchronously performs hand motion along with flickering of the characters to select the characters, and when the user selects the characters, the visual stimulation unit can give visual feedback to the user to prompt the user that the character is selected; the man-machine interface single-character stimulation mode is adopted, the number of system control instructions is the number of characters of the visual stimulation unit, so that the number of channels for collecting myoelectricity is reduced, and the hardware equipment cost is reduced; operation is simple, and practicability and real-time performance are high.

Description

technical field [0001] The invention belongs to the technical field of man-machine interface, and in particular relates to a surface myoelectric man-machine interface system based on a visual stimulation interface and a control method thereof. Background technique [0002] With the improvement of my country's economy and living standards and the development of society, the two special groups of the disabled and the elderly have received more and more attention from the society. The two groups have similar characteristics: weak physical function and poor life autonomy And most of the time they need the care of others; and the population base of these two special groups is large and has an upward trend. Therefore, it is of great significance to solve the daily inconvenience of the disabled and the elderly and improve their quality of life . With the development and progress of science and technology, many environmental control terminal devices such as home appliances and health...

AI Technical Summary

Problems solved by technology

However, the current human-machine interface based on surface electromyography has the following disadvantages: (1) The number of human-machine interface output instructions is proportional to the number of channels for collecting surface electromyography, that is, when more control instructions need to be output, more acquisitions are required. The number of channels of the device and the cost of the device are high; (2) it cannot quickly and accurately identify conscious muscle movements and unconscious muscle movements; (3) when the electrodes fall off or there is external interference, it may cause jumps in the acquisition signal, the traditional threshold Classification only uses a single threshold for classification, and the system may misjudge the jump signal as the input signal of the muscle movement state

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