Miniature wearable electroencephalogram acquisition device

The invention discloses a miniature wearable electroencephalogram acquisition device, which comprises an acquisition electrode, a control device and a power circuit, wherein the control device achieves data transmission with an upper computer outside by virtue of a Bluetooth module; the control device is composed of a preprocessing circuit, an acquisition front end and a controller; the acquisition front end and the controller are in SPI communication; the controller and the upper computer are in Bluetooth communication; an EEG signal is transmitted to the preprocessing circuit and the acquisition front end by virtue of the acquisition electrode, so that filtering, amplification and analog-to-digital conversion of the EEG signal are achieved, and then the preprocessed EEG signal is transmitted to the controller by virtue of an SPI interface; and the preprocessed EEG signal is processed by virtue of a microcontroller which is arranged inside the controller, and the processed data is transmitted to the upper computer by virtue of the Bluetooth module. The electroencephalogram acquisition device disclosed by the invention, under the precondition of guaranteeing signal resolution, can greatly improve universality and can better conform to actual use demands of a user; and the electroencephalogram acquisition device can also reduce production and manufacturing costs.