Desain Sensor Getaran Frekuensi Rendah Berbasis Fluxgate

Abstract

This paper describes the ability of fluxgate to measure vibration in low frequency range. Vibrations were measured by detecting changes in the external magnetic field. The latter was due to changes in distance between the fluxgate probe and the vibrating object. Based on the principle of the second harmonic fluxgate, external magnetic field intensity is proportional to the measured sensor output voltage and inversely proportional to distance. Maximum distance (amplitude) static optimization between the fluxgate probe and the vibrating object was obtained at the distance of 2 cm. Source of low frequency vibrations was the mechanical equipment developed by the FTETI KK Electronics and Instrumentation Physics ITB labor. Based on the measurement of low frequency vibrations, the fluxgate was capable of detecting frequency from 0.14 to 1.15 Hz with absolute error of 0.017 Hz and relative error of 1.3%. Keywords: design, sensor, vibration, low frequency, fluxgate.