Parallel-connection expansion multi-channel electroencephalogram collecting device

Abstract

The invention belongs to the field of medical instruments and particularly relates to a parallel-connection expansion multi-channel electroencephalogram collecting device. The parallel-connection expansion multi-channel electroencephalogram collecting device comprises an electroencephalogram electrode (102), front-end conditioning amplifying modules (103), an analog-to-digital conversion module (104), a logic control module (105), a magnetic field measuring module (106), a communication module (107), an external synchronization transistor-transistor logic (TTL) module (109) and an upper computer (101). The analog-to-digital conversion module (104) collects electroencephalogram signals through the electroencephalogram electrode (102), and N-branch output of the electroencephalogram electrode (102) is connected with the N front-end conditioning amplifying modules (103). The logic control module (105) controls the whole process of electroencephalogram collection, receives commands of the external synchronization TTL module (109), the magnetic field measuring module (106) or the upper computer (101) and collects electroencephalogram digital signals, and after the electroencephalogram digital signals are buffered and packed in the logic control module (105), the electroencephalogram digital signals are transmitted to the upper computer (101) through the communication module (107). The parallel-connection expansion multi-channel electroencephalogram collecting device stimulates electroencephalogram measurement by using changes of an external magnetic filed and has the capacity of recognizing nuclear magnetism signal feathers.

Description

technical field [0001] The invention belongs to the field of medical instruments, and in particular relates to an electroencephalogram acquisition device. Background technique [0002] In 1924, the German psychiatrist, Professor Hans Berger of the University of Jena discovered the existence of EEG for the first time. EEG includes spontaneous EEG and evoked EEG, which can reflect human cognitive processes from the perspective of signals. EEG can not only provide the electrical signal characteristics of a person in a pathological state, but also extract the behavioral electrical characteristic state signal of a person in a non-pathological situation. Now EEG is widely used in medical diagnosis to facilitate the treatment of people's diseases. [0003] There are three main ways to observe brain conditions: magnetic resonance imaging (FMRI), positron emission tomography (PET), clinical electroencephalogram (EEG) and evoked electroencephalogram (ERP) detection. The first two d...

AI Technical Summary

Problems solved by technology

However, the disadvantage of this kind of EEG is that the application is relatively single, the number of leads is small, the accuracy is low, the single-channel rate is less than 200SPS, and the resolution is often not greater than 12 bits.

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