Electroencephalogram acquisition system based on ADS1299, STM32 and ESP8266

Abstract

The invention relates to the technical field of medical equipment, and particularly relates to an electroencephalogram acquisition system based on ADS1299, STM32 and ESP8266. The electroencephalogram acquisition system has the characteristics of simplicity, easiness in use and high precision, can provide guarantee for further electroencephalogram research, and comprises an analog front end, a microcontroller, a wireless module and an upper computer, wherein the analog front end adopts an ADS1299 integrated chip and is used for receiving an electroencephalogram signal subjected to low-pass filtering preprocessing, carrying out filtering, amplification and analog-to-digital conversion on the electroencephalogram signal and meanwhile, sending the processed electroencephalogram signal; the microcontroller adopts STM32F103 and is used for receiving the electroencephalogram signal processed by the analog front end, carrying out data processing on the read electroencephalogram signal and meanwhile, sending the processed data; the wireless module adopts a NodeMCU and is used for receiving the processed data sent by the microcontroller and transmitting the data to the upper computer through Wi-Fi communication; and the upper computer is used for receiving the data sent by the wireless module and analyzing, processing and displaying the data.

Description

technical field [0001] The present invention relates to the technical field of medical equipment, in particular to an EEG acquisition system based on ADS1299, STM32 and ESP8266. Background technique [0002] The EEG signal is usually a weak sine wave with an amplitude between 0.5-200uV, so the acquisition of the EEG signal requires a high multiple of amplification. When the brain receives external stimuli, thinks, or changes in physical state, the frequency and amplitude of brain waves will change. When receiving external stimuli, the human brain will respond quickly within 1 second and generate complex brain wave signals. Therefore, EEG acquisition equipment must have sufficient precision and timely response capabilities; [0003] For many years, the collection of EEG signals has been carried out in a wired way. Although it has the characteristics of high stability, with the continuous improvement of EEG collection technology, the wired transmission method can no longer m...

AI Technical Summary

Problems solved by technology

[0003] For many years, the collection of EEG signals has been transmitted in a wired manner. Although it has the characteristics of high stability, with the continuous improvement of EEG acquisition technology, the wired transmission method can no longer meet the requirements of researchers.

The way of wired data transmission limits the range of activities of the subjects, and even leads to problems such as entanglement between wires; and most of the EEG acquisition system equipment on the market is bulky, has high requirements for the working environment, and is expensive. become an obstacle to EEG research

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