ABSTRACT
Inspiring product is a kind of product that enhancing the existing product with a close-loop system to detect the user's health and to inspire the body in a beneficial way. The bio-signals of the user are being measured and the body is stimulated while the traditional functions of the product are used. An inspiring computer mouse prototype is specialized in this paper as an example of inspiring product to further explain the spirits of inspiring product. With an additional circuit board inside the mouse, addition to the common functions of a computer mouse, the inspiring mouse can detect user's bio-parameters such as pulse wave, heart rate, blood oxygen saturation etc., and emit infrared light to stimulate and improve user's microcirculation imperceptibly as well. A coupled infrared LED and photodiode that was used for detecting pulse wave, a processor system ADuC845 were adopted in the circuit. Pulse wave was transferred into computer via RS-232 with an additional cable along with the common mouse's cord, and analyzed by the analysis software running backgroundly to elicit valuable information. Also the perspective about other inspiring products was discussed.
ABSTRACT
The surface Laplacian can give more localized information of the brain. A concentric bipolar electrode (consisting of a central disc and an outer annulus) can measure the surface Laplacian of the body surface electrical potential distribution. In this article we will study the feasibility of the Laplacian electrode for EEG from the problems of SNR, selection of the electrode parameter. And a new kind of active Laplacian electrode will be introduced to detect the visual evoked potential.
ABSTRACT
The influence of dimension parameters on the performance of Body-surface Laplacian electrodes is studied in this paper. Some rules about the parameter optimization design are presented. The investigation suggests that the effective radius b should be equal to the inner radius of the ring electrode in order to reduce the relative error. Besides, in the presence of weak bioelectrical signals, reasonably increasing b would be helpful to improve SNR. Furthermore, an evaluation method based on these principles is prompted, as an instance of which, feasibility of introducing Surface Laplacian technique into EGG exploration is discussed.