The aim of this project is to create a linear position sensor with an accuracy of 1 μm. Two ‘driving’ inductors are powered by a frequency generator with a magnitude of 4.5 V and a frequency of 1.5 kHz. The inductors create an oscillating magnetic field which induces a voltage in the unpowered receiving inductor. The change in amplitude of this voltage indicates the position of the receiving inductor in reference to the driving inductors. This project offers a low cost alternative to laser interferometry for high accuracy incremental position measurement.
Clark, Brittany and Vreeland, Erin, "Linear Inductive Position Sensor" (2015). Electrical Engineering and Computer Science Student Publications. 30.