Psychology State Acquiring Device Based on Sitting Postures for Implicit Interaction

Context-aware is very important for implicit interaction. User's psychology state as a kind of user context can be used in the interaction, to improve quality and to make the service more individual. In this article, a psychology state acquiring device based on sitting postures for implicit interaction is developed. The device consists of two parts: pressure sensor matrix and micro control unit. The former is made up of 40 pairs of pressure sensor node to sense pressure distribution on it, and the latter has a power supply module, first/second level CD4051 parts, operational amplifier LM324, AD0804, and STC89C52RC mainly to realize sampling control and analysis. With this device, several experiments are carried on. It can be seen that the effect is good enough in single set testing, area (palm/sitting) testing and the actual environment testing. So it can be used in implicit human computer interaction researches, and applied in another area.