Rancang Bangun Sistem Telemetri Nirkabel Untuk Pendeteksian Dini Tsunami Berdasarkan Penginderaan Laju Surut Air Laut

Authors

  • Tania Mayangsari Jurusan Fisika FMIPA Universitas Andalas
  • Wildian Wildian Jurusan Fisika FMIPA Universitas Andalas

DOI:

https://doi.org/10.25077/jfu.6.2.169-175.2017

Abstract

Sistem telemetri nirkabel peringatan dini tsunami berdasarkan penginderaan laju surut air laut telah dirancang-bangun.  Sistem sensor yang digunakan terdiri dari dua detektor tingkat permukaan air laut.  Masing-masing detektor terdiri dari sebuah LED dan sebuah fotodioda yang terpisah secara horizontal sejauh 15 mm.  Kedua detektor terpisah secara vertikal sejauh 150 mm.  Laju surut air laut ditentukan dengan membagi jarak kedua detektor dengan waktu yang diperlukan permukaan air laut dari posisi atas ke posisi bawahnya.  Besaran ini dihitung secara otomatis oleh mikrokontroler pada modul Arduino Uno R3.  Informasi kemudian dikirim ke stasiun penerima dengan menggunakan modul transceiver nRF24L01+.  Data ditampilkan pada personal computer (PC) menggunakan perangkat lunak LabVIEW dan disimpan dalam Microsoft Excel.  Peringatan dini tsunami akan diberikan ketika laju penurunan permukaan air mencapai laju 0,66667 mm/s (laju minimum penurunan permukaan air laut yang menyebabkan tsunami di Bali) menggunakan buzzer.  Uji laboratorium menunjukkan bahwa sistem sensor ini mampu mengukur laju penurunan permukaan air dengan kesalahan relatif maksimum 2,02 %.  Pengujian di lapangan memperlihatkan bahwa data dapat ditransmisikan sejauh 1000 m jika tanpa penghalang dan 400 m jika di lokasi terdapat penghalang.  Hasil pengujian alat skala laboratorium menunjukkan bahwa alat pendeteksi dini tsunami sudah dapat bekerja karena bisa membedakan antara laju surut tsunami (laju ≥ 0,6 mm/s) dan laju surut normal (laju < 0,6 mm/s).

Kata kunci: penginderaan laju surut, sistem peringatan dini tsunami, transceiver nRF24L01+.

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Published

2017-04-04

How to Cite

Mayangsari, T., & Wildian, W. (2017). Rancang Bangun Sistem Telemetri Nirkabel Untuk Pendeteksian Dini Tsunami Berdasarkan Penginderaan Laju Surut Air Laut. Jurnal Fisika Unand, 6(2), 169–175. https://doi.org/10.25077/jfu.6.2.169-175.2017

Issue

Vol. 6 No. 2 (2017)

Section

Articles

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Copyright (c) 2017 Tania Mayangsari, Wildian Wildian

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