Elektromagnetik indüksiyon sensörleri için bobin geometrileri optimizasyonu

In this thesis, several coil geometries for electromagnetic induction sensors are designed and optimized to provide good performance at desired frequency using FEKO electromagnetic simulation program. After that, a comparison of different coil geometries was performed. Studied coil geometries are DD-type coil, coaxial type coil, and 8-shaped coil. Also, their performances were evaluated in detection of canonical, nonmagnetic metallic targets such as small sphere, coin, and small nail. After optimizing the coil geometries in free space, effects of several soil types, where targets lie beneath earth surface, with different electromagnetic characteristics such as dry soil, wet soil and highly mineralized ferrous soil were investigated for detection of these canonical objects. Induced current in the receive coil was simulated and observed for all types of coil geometries and soils at certain depths in order to characterize detection capabilities. Also, a prototype was prepared for coaxial type coil and induced voltage measurements were performed on air in the presence of different targets.