A Variable Configuration Force Sensor With Adjustable Resolution for Robotic Applications

Multitask measurements with different measuring ranges and resolutions have put forward higher requirements for force sensors. This article presents a novel variable configuration approach to develop an adjustable-resolution sensor compact force-sensitive structure. Unlike the traditional strain gauge-based measurement, external is detected through displacement of deformed structure precision optical linear encoder. can enable range resolution continuous adjustment structural stiffness. Specifically, stiffness implemented by changing second moment area rotating its build-in flexure beam shafts. Analytical models are established provide theoretical basis analysis design sensor. Furthermore, validity evaluated finite element simulations. Finally, prototype developed performance evaluation, applied wire bond pull tests evaluate strength on printed circuit board assembly. Experimental results show that it effective change adjustment.