Article Per Year (5 Year)
p-Index From 2021 - 2026
0.408
P-Index
This Author published in this journals
All Journal Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) JURNAL PERTANIAN PRESISI (JOURNAL OF PRECISION AGRICULTURE)
Saifuddin Afif
Universitas Gadjah Mada
Agriculture, Biological Sciences & Forestry Engineering

Published : 2 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 2 Documents
Search

 1 
SIMULASI SISTEM MONITORING LENGAS TANAH BERBASIS ADC DAN KENDALI IRIGASI OTOMATIS MENGGUNAKAN METODE HYSTERESIS UNTUK APLIKASI PERTANIAN PRESISI Ardan Wiratmoko; Andri Prima Nugroho; Murtiningrum; Gigieh Henggar Jaya; Saifuddin Afif; Mukhes Sri Muna; Agapetalia Indriyawati; Lilik Sutiarso
Jurnal Pertanian Presisi (Journal of Precision Agriculture) Vol. 10 No. 1 (2026)
Publisher : Universitas Gunadarma

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35760/jpp.2026.v10i1.259

Abstract

Penelitian ini bertujuan mensimulasikan sistem monitoring lengas tanah berbasis Analog to Digital Converter (ADC) dan kendali irigasi otomatis menggunakan metode hysteresis untuk aplikasi pertanian presisi. Model simulasi dikembangkan secara komputasional menggunakan Python dengan merepresentasikan alur akuisisi sinyal sensor, penambahan noise, pengondisian sinyal menggunakan filter RC low-pass, konversi analog-ke-digital, estimasi Volumetric Water Content (VWC), serta keputusan aktuasi pompa. Sensor lengas tanah dimodelkan menghasilkan tegangan 0,50–2,50 V yang merepresentasikan 0–60% VWC. Hasil simulasi menunjukkan bahwa ADC 12 bit dengan tegangan referensi 3,30 V menghasilkan resolusi 0,8059 mV/count dan estimasi resolusi lengas tanah sebesar 0,0242% VWC/count. Frekuensi sampling 20,00 Hz memenuhi kriteria Nyquist, sedangkan filter RC mampu menurunkan RMSE dari 197,06 mV menjadi 68,18 mV. Kendali hysteresis dengan ambang ON pada VWC<25% dan OFF pada VWC>38% menghasilkan respons pompa yang stabil dengan duty cycle 15,28% selama simulasi 72 jam. Simulasi ini menunjukkan bahwa integrasi ADC, pengondisian sinyal, dan hysteresis berpotensi menjadi dasar pengembangan sistem irigasi presisi berbasis monitoring lengas tanah.
Studi Laju Pengeringan Umbi Porang pada Berbagai Ukuran Umbi dan Periode Panen Saifuddin Afif; Sri Rahayoe; Eni Harmayani; Fertika Nur Fitriyana; Lisa Astiana Ghina
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol. 15 No. 3 (2026): June 2026
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtepl.v15i3.882-894

Abstract

Porang (Amorphophallus oncophyllus) is a strategic glucomannan source for food and industrial applications, whose chip and flour quality is strongly influenced by drying performance; however, the combined effects of harvest month and tuber size on convective drying kinetics remain poorly quantified. This study estimated the convective heat transfer coefficient (h) and effective drying rate constant (k) of 7-mm porang slices using a coupled heat–mass balance framework. Tubers were classified into three size categories and dried in a 50 °C cabinet dryer across five harvest months (June–October), with continuous monitoring of air and product temperatures. The Lewis thin-layer model was solved numerically using a fourth-order Runge–Kutta method, and parameters were estimated by minimizing the mean absolute percentage error. Product temperature profiles showed rapid initial heating, a quasi-steady plateau at 43–46 °C, and a final rise, indicating dominance of the falling-rate regime. Estimated h ranged from 42 to 72 W·m⁻²·°C⁻¹ and kₚ from 2.70 to 3.99 h⁻¹. Two-way ANOVA showed no significant effects of harvest month, tuber size, or their interaction (p > 0.05), supporting the use of effective average parameters for robust drying-process standardization and scale-up.
Co-Authors Agapetalia Indriyawati Andri Prima Nugroho Ardan Wiratmoko Eni Harmayani Fertika Nur Fitriyana Gigieh Henggar Jaya Lilik Sutiarso Lisa Astiana Ghina Mukhes Sri Muna Murtiningrum Sri Rahayoe