Numerical integrator system for drift compensated fluxmeter

Abstract

In the paper the design and proof-of-concept of compact digital integrator is presented. The proposed Raspberry Pi-based system works as a four-terminal building block for fluxmeters and magnetoelastic transducers. It is meant to replace the currently used RC integrator circuits, and allows for real-time advanced signal analysis practically eliminating drift at frequencies down to the 0.001 Hz. Tests of the designed solution confirmed the correctness of the integrator operation.