Fibre optic-based force sensor for bio-mimetic robotic finger

Abstract

A novel optical-based fingertip force sensor, which is integrated into a bio-mimetic finger for robotic and prosthetic manipulation is presented. This is used to obtain tactile information during grasping and manipulation of objects. Unlike most devices the proposed force sensor is free of any electrical and metal components and as such is immune to electromagnetic fields. The sensor is simple and very compact, has extremely low power consumption and noise levels and requires no additional hardware. It is based on a cantilever design combined with fiber optics and is integrated into the distal phalanges of a robotic finger. The unique design of the sensor makes it ideally suited for use in messy or harsh environments that may be prone to electromagnetic fields, granular or liquid intrusion, may include combustible gasses or be subject to radiation.