Electroencephalogram acquisition and wireless transmission device

Abstract

The invention discloses an electroencephalogram acquisition and wireless transmission device, which comprises a TGAM module, a forehead electrode, two ear clip electrodes, a Bluetooth transmitting module, a Bluetooth receiving module and an upper computer, wherein the output of the forehead electrode is connected to the TGAM module; the outputs of the two ear clip electrodes are respectively connected to the TGAM module; the input of the Bluetooth transmitting module is connected to the TGAM module; the Bluetooth receiving module is connected to the Bluetooth transmitting module in a mode of wireless communication; the input of the upper computer is connected to the Bluetooth receiving module; and the upper computer is provided with a USB interface module and an electroencephalogram display and analysis system: the input of the USB interface module is connected to the Bluetooth receiving module and the output is connected to the electroencephalogram display and analysis module. The device disclosed by the invention can achieve electroencephalogram acquisition and wireless transmission, avoid the limit of conventional wired measurement and enhance the mobility of the system, and the device can display electroencephalogram in real time and implement time-frequency analysis; and the device is reasonable and portable in structure, convenient to operate, applicable to the fields of medicine, education, scientific research and the like, and suitable for medical detection, technical research and development, etc.

Description

technical field [0001] The invention relates to medical instruments, in particular to a device for collecting and wirelessly transmitting brain waves. Background technique [0002] When the brain nerves are active, there will be weak electric field fluctuations. When tens of thousands of nerves are active at the same time, the electric field will produce rhythmic fluctuations. These fluctuations, known as brain waves, can be measured from the scalp. Different mental states will cause different forms of neural activity, resulting in different brain waves. The characteristics of the EEG signal: First, the EEG signal is very weak, generally only about 50 μV, and the amplitude range is 5 μV to 100 μV, so the amplification gain of the EEG signal is much higher than that of the general signal, generally about 20,000 times. Second, the EEG signal scalp and skull usually have a resistance of several thousand Ω, so the front part is required to have a high input impedance to improv...

AI Technical Summary

Problems solved by technology

Fourth, in ordinary environments, EEG signal acquisition is subject to common-mode interference such as power frequency interference, and the signal-to-noise ratio is usually lower than -10dB

Although the traditional EEG machine has good accuracy, it is bulky, inconvenient to move, poor anti-interference performance, inconvenient to install and relatively expensive, which has great limitations

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