Hall sensor array for measuring displacement of a 2D magnet array

Abstract

There are numerous cases where sensing signal is corrupted by harmonic components or a desired harmonic component is hidden in other harmonic signals. Therefore, various studies have been done in filtering or estimation algorithm to filter or extract harmonic signal. This paper presents sensor array for filtering of harmonic signals. First, 1D sensor array is introduced to filter n harmonic components. Then, 1D array is extended to 2D sensor array to filter out 2D harmonic signals. Finally, hall sensor array is built to measure displacement of a 2D magnet array and its performance is verified with experiments.