Wearable, Multimodal, Biosignal Acquisition System for Potential Critical and Emergency Applications

Figure 1

System architecture, including the EEG signal acquisition system. (a) System architecture. The system consists of three parts: recording modules, a microcontroller, and an online interface. The core system is the Arduino Mega 2560, which has the following characteristics: (1) an open-source single-chip microcontroller that uses an Atmel AVR single chip, (2) open-source software, (3) a hardware platform built into a simple I/O interface panel, and (4) a development environment based on the C language. Biosignals are acquired by separate related modules: (1) an EEG module (BR8), (2) an ECG module (AD8232), and (3) an SpO₂ module (MAX30100). (b) The EEG signals are first amplified by two analog amplifier circuits and then sent to the ADC (ADS1298) for sampling. The digital signals converted by the ADC are transmitted to the microcontroller unit (MSP430) via an SPI. After the signals are encoded by MSP430, the raw EEG data are sent to other receiver devices through RS-232 interfaces for further analysis or application.

(a)

(b)