Simulation and Modelling of a Precision Method for Static Low Force Measurement

Abstract

This study addresses the growing need for precision static low-force measurement in industries and metrology. Traditional force measurement systems rely on contact-based methods, involving the attachment of deflection sensors to the spring element, which can lead to electronic complexity and limited robustness, especially for low-force measurement. Therefore, this study demonstrates and presents a novel and robust force sensing approach for static low-force measurement by introducing a simple and easily implementable non-contact force sensing method. The research begins with the designing and modelling of cross beam spring element, followed by virtual testing using Ansys Finite Element Analysis (FEA) software to determine the maximum induced stress for validating the design for a 5 N load capacity. Additionally, the FEA study explores the optimal detectable deflection to assess the feasibility of utilizing speckle pattern imaging techniques for non-contact force measurement. Experimental simulated results reveal a linear correlation between angular deflection and exerted force with a calibration constant of approximately 0.0008 radians per Newton. This approach has offered a promising and efficient solution for precision static low force measurement and could also be used in other fields of metrology.