<title>Micromachined inductive displacement sensor</title>

Abstract

In this paper a new concept for a micro coil for the realization of a displacement sensor or angular sensor is presented. The sensor consists of a 3D coil, consisting of two half coils and a movable iron core. Though the coil is fabricated by means of silicon bulk micromachining, it is possible to move an iron core through the coil without destroying the windings. The inductance of the coil is 0.25 (mu) H without core and 7.2 (mu) H with core. The ohmic resistance has a value of 60 (Omega) . The sensors developed are used in gesture recognition. For this application several micro coils are mounted on a data glove. The sensors have the task to measure the flexion of fingers.