Brain-computer interface system

Abstract

The invention discloses a brain-computer interface system which comprises a brain electrical signal collecting electrode, an analogue signal processing module and a digital signal processing module, wherein the analogue signal processing module comprises a prefixed amplifying circuit, an anti-aliasing filter circuit and a DC offset circuit; the digital signal processing module comprises an analog-digital converter, a microcontroller, an ARM processor and a wireless transmission circuit; the brain electrical signal collecting electrode inputs an acquired signal into the prefixed amplifying circuit, outputs of the prefixed amplifying circuit are separately connected to the anti-aliasing filter circuit and the DC offset circuit, and the output end of the DC offset circuit is connected to the prefixed amplifying circuit; and the output end of the anti-aliasing filter circuit is successively connected to the analog-digital converter, the microcontroller, the ARM processor and the wireless transmission circuit. By reasonably designing a hardware circuit and a digital circuit, a brain electrical signal with a high signal to noise ratio can be acquired; the circuit structure is simple; and the volume of interface equipment can be reduced, real-time online data processing can be realized, and the system can be widely applied to actual life.

Description

technical field [0001] The invention belongs to the technical field of biological information, in particular to a brain-computer interface system. Background technique [0002] The brain-computer interface is a new type of human-computer interaction technology, and it is a communication control system that does not depend on the normal output channels of the peripheral nerves and muscles of the brain. It establishes a direct communication and control channel between the human brain and computers or other electronic devices by collecting and analyzing the bioelectrical signals of the human brain, so that people can express their wishes or manipulate devices through the brain without the need for language accounting or body movements. [0003] The important purpose of the brain-computer interface is to help patients with normal thinking but severely limited motor ability, so that they can communicate with the outside world in a more comprehensive way with the help of external...

AI Technical Summary

Problems solved by technology

However, most of the existing brain-computer interface systems are in the stage of theoretical experiments.

In addition, these experimental equipment are bulky, the system is scattered, there are many wires, and the data can only be analyzed offline, which makes the brain-computer interface system unable to be applied to real life

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