Rancang Bangun Alat Ukur Kelembaban Udara Berbasis Mikrokontroler ATMega328 dengan Sensor Serat Optik Evanescent Menggunakan Film Gelatin

Authors

  • Fitria Khairunnisa Jurusan Fisika, FMIPA, Universitas Andalas
  • Harmadi Harmadi Jurusan Fisika, FMIPA, Universitas Andalas

DOI:

https://doi.org/10.25077/jfu.6.3.217-224.2017

Abstract

Telah dirancang alat ukur kelembaban udara dengan sensor serat optik evanescent. Cladding serat optik dikupas dan diganti dengan film gelatin. Variasi panjang pengupasan cladding serat optik adalah 1 cm, 2 cm, dan 3 cm. Kelembaban udara diukur dengan mengukur kelembaban udara di dalam humidity chamber. Alat ukur dirancang menggunakan sistem sensor yang terdiri dari laser dioda sebagai sumber cahaya, serat optik, fotodioda sebagai fotodetektor, dan mikrokontroler sebagai pengolah sinyal. Kelembaban diukur berdasarkan tegangan keluaran fotodioda. Semakin tinggi kelembaban udara maka semakin tinggi tegangan keluaran fotodioda. Hasil karakterisasi serat optik menunjukkan serat optik dengan panjang pengupasan 1 cm adalah yang paling optimum dalam mengindra kelembaban. Nilai sensitifitas sensor yang dirancang adalah 0,0186 V/%RH dengan koefisien determinasi R2 = 0,9457. Persentase rata-rata kesalahan alat ukur yang dirancang adalah 1,56% dibandingkan dengan alat ukur acuan (humidity meter).

Kata kunci: kelembaban udara, alat ukur, sensor serat optik, evanescent.

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Published

2017-07-05

How to Cite

Khairunnisa, F., & Harmadi, H. (2017). Rancang Bangun Alat Ukur Kelembaban Udara Berbasis Mikrokontroler ATMega328 dengan Sensor Serat Optik Evanescent Menggunakan Film Gelatin. Jurnal Fisika Unand, 6(3), 217–224. https://doi.org/10.25077/jfu.6.3.217-224.2017

Issue

Vol. 6 No. 3 (2017)

Section

Articles

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Copyright (c) 2017 Fitria Khairunnisa, Harmadi Harmadi

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