Method for precisely synchronizing wireless data of electroencephalogram device

Abstract

The invention provides a method for precisely synchronizing wireless data of electroencephalogram device. The electroencephalogram device comprises a central processing system and at least one acquisition subsystem. A principal clock of the central processing system completes synchronous timing among secondary clocks of the acquisition subsystems through a method of performing multiple times of time synchronization. Each time of time synchronization comprises the steps that the central processing system sends synchronization data wirelessly to the secondary clocks of all acquisition subsystems through a first communication protocol; the acquisition subsystem resets a timestamp of the corresponding acquisition secondary clocks after receiving the synchronization data; the synchronized secondary clocks add the timestamp to each data packet and send the timestamp to the central processing system through a second communication protocol along with data information; and the central processing system performs data alignment and processing by combining the received data information according to actual requirements. The first communication protocol is a connectionless communication protocol, and the second communication protocol is a connection-oriented communication protocol.

Description

technical field [0001] The invention relates to a wireless data transmission method, especially a method capable of realizing precise wireless data synchronization, and a device for realizing the method. Background technique [0002] Event-related evoked potential (ERP) is an electroencephalogram (EEG) induced by a specific stimulus, which can reflect the neurophysiological changes in the cognitive process of the brain under the stimulus, so it is widely used in neuroscience, psychology and other fields. In addition to the essential acousto-optic stimulator and EEG acquisition system, the ERP-based EEG system sometimes needs to combine some other information such as the attached figure 1 Various environmental variables and other physiological signals in the environment to explore new experimental paradigms and develop practical ERP-based EEG devices, such as letter input devices based on visual evoked potentials, environmental controllers based on brain-computer interfaces, ...

AI Technical Summary

Problems solved by technology

[0008] 1. Both are wired transmission schemes, which require the stimulator and EEG acquisition system to be connected by cable, which greatly limits the flexibility of experiments and related system development

[0009] 2. The existing wireless networking scheme is limited by the transmission speed and efficiency. A group of wired connections with synchronous trigger signals can only transmit one stimulation trigger signal to one EEG acquisition system at a time, making it difficult to realize multiple stimulation systems and multiple Synchronization of a synchronously acquired physiological parameter with the EEG acquisition system

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