A Hardware-in-the-Loop Approach for the Design of Analog Filter Structures for Weighing Systems

Abstract

The design and implementation of analog filter structures for real-world sensory applications can be a challenging process, due to the typical interdependence of sensor units, analogue filter elements and digital processing devices. Therefore, most design approaches still rely on a prototypic filter implementation and a subsequent measurement-based validation. This paper discusses a Hardware-in-the-Loop (HIL) based approach for analog signal processing elements, based on circuit modelling and simulation and the integration of an adequate hardware interface. The adequacy of the novel approach is evaluated for a weighing application based on strain gauges and provides a proof of the suggested procedure. The achieved results based on a case study for weighing systems shows the adequacy of the approach for real sensor applications.