Electroencephalogram detection device and method

A detection device, EEG technology, applied in the directions of diagnostic recording/measurement, medical science, sensors, etc., can solve the problem of not solving multiple EEG signals at the same time, high sampling rate sampling, etc., to improve the input dynamic range, anti-interference, etc. Strong ability and the effect of simplifying circuit design

Active Publication Date: 2014-03-19
NANJING VISHEE MEDICAL TECH
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Therefore, the existing conventional digital electroencephalograph does not solve the problem of wide bandwidth (0-2000Hz), high precision (24 bits), and high sampling rate sampling of multiple EEG signals at the same time.

Method used

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  • Electroencephalogram detection device and method
  • Electroencephalogram detection device and method
  • Electroencephalogram detection device and method

Examples

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Embodiment

[0028] Example: The EEG detection device of the present invention includes a preamplifier circuit, an anti-aliasing filter circuit, an AD converter, and an analysis computer. There are 70 preamplifier circuits, anti-aliasing filter circuits, and AD converters respectively, and each A preamplifier circuit, an anti-aliasing filter circuit, and an AD converter are connected in sequence to form a sampling and analog-to-digital conversion circuit, and 70 sampling and analog-to-digital conversion circuits are connected in parallel to form 70 data streams, and then passed through a high-speed The data collection circuit collects a high-speed data stream and sends it to the analysis computer for analysis and processing through the data transmission circuit. The data transmission circuit is connected to the computer for analysis by means of optical fiber isolation and USB interface.

[0029] Pre-amplification circuit: The EEG signal is first introduced into the pre-amplification circ...

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Abstract

The invention discloses an electroencephalogram detection device. The device comprises preamplifying circuits, anti-aliasing filter circuits, analog-to-digital (AD) converters and an analytical computer, and is characterized in that: each of the preamplifying circuits, each of the anti-aliasing filter circuits and each of the AD converters are sequentially connected to form a sampling and AD conversion circuit respectively; a plurality of sampling and AD conversion circuits are connected in parallel to form a plurality of channels of data streams; and then the data streams are collected into a high-speed data stream through a high-speed data collection circuit, and the high-speed data stream is transmitted to the analytical computer for analysis and processing through a data transmission circuit. The invention also discloses an electroencephalogram detection method. By the electroencephalogram detection device, the requirement of simultaneously performing high-rate (10KHZ per channel) and high-precision (24bit) sampling on a plurality of channels of electroencephalogram signals can be met, so that the device has the characteristics of high stability, strong anti-jamming capability, wide frequency band range and the like.

Description

technical field [0001] The invention relates to an electroencephalogram detection device and a corresponding detection method. Background technique [0002] With the development of modern medical diagnostic technology, in recent years, people have begun to detect and study the bioelectrical activity (event-related potential) generated by the thinking activities of the human brain, which requires wider and wider frequency bands for collecting EEG signals. , and EEG signals often require multi-channel simultaneous acquisition, and the bandwidth of each channel can reach up to 0-2000Hz, which requires the sampling frequency of each channel to be at least above 4KHz. [0003] For the weak EEG signal, it is often accompanied by a much larger interference signal. Amplifying the EEG signal will inevitably amplify the interference signal. For microvolt-level EEG signals, if they want to distinguish clearly in a sampling system below 16 bits, they must be amplified at least 1000-10...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B5/0476
Inventor 花怀海
Owner NANJING VISHEE MEDICAL TECH
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