R. N. Setiadi
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ANALISA SIFAT FISIS SENSOR KOIL DATAR DENGAN VARIASI GEOMETRI Roberto, R.; Umar, L.; Setiadi, R. N.
Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam Vol 1, No 1 (2014): Wisuda Februari 2014
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam

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Abstract

Flat coil inductive sensors based on Eddy currents principal could work without directmechanical contact on the object, it could work continuously and reactively to theconductive material. This system is easily influenced by external disturbances. Based oninductance value due to changes in magnetic force lines that occurs between the sensorand conductor material (disturbances material). The system could be used as a detectionof distance translation. The used sensors in this study was a flat coil made of PrintedCircuit Board (PCB) technology with various geometric shapes, such as circle, square,rectangle and octagonal. Distance detection analysis were evaluated using a LCoscillator which was directly connected to a computer that able to transform a massiverange measurement into frequencies. Characteristics of distance detection wasinfluenced by geometry of the flat coil sensors with its highest value of frequency of1.68 MHz for a circular shape, 1.66 MHz for an octagonal shape, 1.52 MHz for ansquare shape, 1.42 MHz for an rectangular shape, respectively with the minimumdistances as far as 5 mm for each shape. The temperature tested as external disturbancescaused change in characteristics of the transfer curve based on drift frequency fordistance detection analysis based on a mathematical formula.
Desain Sensor Getaran Frekuensi Rendah Berbasis Fluxgate Yulkifli Yulkifli; Hufri Hufri; Mitra Djamal; R. N. Setiadi
Jurnal Otomasi, Kontrol, dan Instrumentasi Vol 3 No 2 (2011): Jurnal Otomasi, Kontrol, dan Instrumentasi
Publisher : Pusat Teknologi Instrumentasi dan Otomasi (PTIO) Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/joki.2011.3.2.1

Abstract

Makalah ini menjelaskan kemampuan fluxgate untuk mengukur getaran dalam rentang frekuensi rendah. Getaran diukur  berdasarkan perubahan medan magnet luar terjadi karena adanya perubahan jarak antara probe sensor fluxgate dengan objek yang bergetar. Berdasarkan prinsip harmonisa kedua untuk fluxgate, besarnya intensitas medan magnet luar yang terukur sebanding tegangan keluaran sensor dan berbanding terbalik dengan jarak. Optimasi statik terhadap jarak maksimum (amplitudo) antara probe fluxgate dengan objek bergetar diperoleh ketika jarak 2 cm.  Sebagai sumber getaran digunakan peralatan mekanik frekuensi rendahmekanik yang dikembangkan oleh KK FTETI  di Labor Elektronika dan Instrumentasi Fisika ITB.  Berdasarkan pengukuran terhadap getaran frekuensi rendah, Fluxgate mampu mendeteksi frekuensi 0.14 sampai 1.15 Hz dengan kesalahan absolut 0.017 Hz dan kesalahan relatif 1.3 %.  Keyword: Desain, sensor, Getaran, frekuensi rendah,  fluxgate.