A flexible sensor measuring displacement and bending

Abstract

This paper proposes a new sensor that is capable of measuring both linear displacement and bending. The sensor is designed to be used with an electrostatic film motor that features mechanical flexibility, but can also be used as an independent sensor. The sensor employs three-phase electrodes both in sliding and stationary parts and estimates displacement and bending from the change of the capacitance between the electrodes. The paper describes an equivalent capacitance-network model for the sensor. Based on the model, sensing principles for both displacement and bending are presented and analyzed. The analyses are experimentally verified using a prototype sensor. The experimental results show that the prototype sensor could measure both displacement and bending with little interference between them.

Modular correction method of bending elastic modulus based on sliding behavior of contact point

“…During the three-point bending testing, a uniaxial bending load is continuously applied on a carefully prepared specimen and the corresponding deflection is recorded. Therefore, the testing device's stiffness and the veracity of deflection are required to be taken into account [8,9]. Many attempts have been made to carry out the bending tests on function materials [10], semiconductor materials [5,11] and structure materials [1,2,7], such as Fist et al [5], who proposed a three-point bending device to study the vibrational response of ZrB 2 + SiC and LaCoO 3 ceramics.…”