Abstract
This paper describes performances of fiber optic sensor modules developed for a sensor network system embedded into living spaces where an intelligent ubiquitous service would be offered. Three types of fiber-optic sensor modules are developed as a so-called optical nerve sensor network, in order to acquire presence information which can indicate the condition of human, structural materials and other stuffs in common living space. The sensor modules are successfully realized in the forms of a plastic tiled mat, a cushion and a binary switch, taking advantages of a hetero-core fiber optic technique which enables easy arrangement into our living space. The sensor modules can bring us effective presence information in terms of the weight and temporal profiles of human and space conditions in their natural and unconstrained behavior. The practical performance and advantage of this sensor network system have been verified from the service experiments performed in a test field where the sensor modules were installed in realistic density.
