Pemodelan Sensitivitas Sensor Linear Variable Differential Transformer (LVDT) dengan COMSOL Multiphysics

Abstract

Linear Variable Differential Transformer (LVDT) sensor is a position sensor that is widely used in the industrial field as a control system because it has a high level of accuracy, precision, excitation and has a sensitivity value of 61.8 mV/mm. In this study the sensitivity value can be increased by strengthening the output signal of the LVDT sensor. COMSOL Multiphysics software is used to simulate LVDT sensors with cores using Iron, Supermendur and Vitrovac materials. Coils also vary from 100, 1,000, and 10,000 coils. The simulation results showed variations in materials with high permeability had larger magnetic fields, and the addition of the number of coils also affected the magnetic field. The magnetic field relationship is directly proportional to the output signal, so a large magnetic field can increase the sensitivity value.