Optical and mechanical characterization of microfabricated optical bend loss sensor for distributive pressure measurement
The paper describes the development of a mesh waveguide sensor capable of measuring pressure force at the plantar
interface. The uniqueness of the system is in its batch fabrication process, which involves a microfabrication molding
technique with poly(dimethylsiloxane)(PDMS) as the optical medium. The pressure sensor consists of an array of
optical waveguides lying in perpendicular rows and columns separated by elastomeric pads. A map of normal stress was
constructed based on observed macro bending which causes intensity attenuation from the physical deformation of two
adjacent perpendicular waveguides. In this paper, optical and mechanical analysis of the bend loss will be presented.
We will also present the results using a two-layer neural network system for force and image construction of fourteen
different shape patterns and its corresponding four different applied forces.
This paper was published in SPIE Proceedings Vol. 6532
Health Monitoring of Structural and Biological Systems 2007, Tribikram Kundu, Editors, 65321K