Rancang Bangun Alat Pendeteksi Ulat Dalam Buah Mangga Menggunakan Sensor Ultrasonik
DOI:
https://doi.org/10.25077/jfu.8.4.336-341.2019Abstract
Telah dihasilkan alat pendeteksi ulat dalam buah manggamenggunakan sensor ultrasonik HC-SR04. Alat yang dikendalikan mikrokontroler dalam modul Arduino Unoini dibuat untuk membantu masyarakat mengetahui ada tidaknya ulat dalam buah mangga yang akan dibeli atau dimakan, dan memudahkan eksportir dalam mensortir buah mangga yang hendak diekspor. Modul sensor ultrasonik HC-SR04bekerja berdasarkan prinsip lamanya waktu perambatan gelombang ultrasonik sejak dipancarkan oleh transmitter hingga diterima kembali oleh receiver pada modul yang sama akibat pemantulan oleh objek. Hasil pengujian menunjukkan bahwa tegangan keluaran sensor lebih besar ketika mendeteksi buah yang berulat (yaitu diatas 30 mV) daripada buah tak-berulat (di bawah 30 mV). Hal ini terjadi karena buah yang berulat memiliki struktur dalam yang lebih lunak atau berongga sehingga gelombang ultrasonik dapat menembus lebih dalam, mengakibatkan waktu perambatan gelombang menjadi lebih lama dibandingkan pada buah yang tak-berulat. Hasil pengujian juga memperlihatkan bahwa pendeteksian paling efektif terjadi ketika detektor berjarak6 cm, detektor dapat mendeteksi keberadaan ulat pada salah satu sisi mangga dengan keakuratan alat sebesar 84,6%. Detektor ini dilengkapi LCD dan buzzer yang akan menginformasikan ada-tidaknya ulat dalam buah mangga.
Kata Kunci : detektor, mangga, ulat buah, ultrasonikDownloads
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Copyright (c) 2019 Mei Suci Indrianti, Wildian Wildian
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