Abstract
The output characteristic model of a magnetostrictive cantilever-like tactile sensor has been founded based on the inverse-magnetostrictive effect, the flexure mode, and the Jiles-Atherton model. The magnetostrictive sensor has been designed and an output voltage is analyzed under the conditions of bias magnetic field, contact pressure and deflection of cantilever beam. The experiment has been performed to determine the relation among the induced output voltage, bias magnetic field, and pressure. It is found that the peak of the induced output voltage increases with an increasing pressure under the bias magnetic field of 4.8kA/m. The experimental result agrees well with the theoretical one and it means that the model can describe the relation among the induced output voltage, bias magnetic field, and pressure. The sensor with a Galfenol sheet may hold potentials in sample characterization and deformation predication in artificial intelligence area.
Highlights
Galfenol is a kind of magnetostrictive material which has the characteristics of low saturated magnetic field, good toughness, and high tensile strength
The magnetostrictive tactile sensor should be designed according to the inverse magnetostrictive effect
The calculated output voltage is barely influenced by pressure at low bias magnetic field
Summary
Galfenol is a kind of magnetostrictive material which has the characteristics of low saturated magnetic field, good toughness, and high tensile strength. Based on the inverse magnetostrictive effect of Galfenol, the pressure and displacement sensors have been researched and manufactured.[1,2,3,4] The tactile sensor is a key technology for the development of artificial intelligence system. A cantilever-like tactile sensor, based on the inverse-magnetostrictive effect, has been designed and the output characteristic for the tactile sensor has been analyzed. The output voltage model for the tactile sensor has been developed, according to the flexure mode, the inversemagnetostrictive effect, and the Jiles-Atherton model.[8,9] The output voltage induced in the detecting coil is mainly related to the bias magnetic field, the contact force, the position of the object, and the deflection of the cantilever beam. The contact force (or pressure) and the friction coefficient of the object can be predicted by using the output voltage model for the cantilever-like tactile sensor
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