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Jurnal Ilmiah Poli Rekayasa
Published by Politeknik Negeri Padang
ISSN : 18583709     EISSN : 26853922     DOI : 10.30630/jipr
Core Subject : Education,
Education
Jurnal Ilmiah Poli Rekayasa adalah jurnal ilmiah yang diterbitkan 2 edisi dalam setahun, bulan April dan Oktober. Terbit sejak tahun 2005. Fokus Kajian jurnal ini adalah Fokus kajian artikel dalam JPR mencakup Mechanical Engineering, Civil Engineering, dan Electronica, Electricty dan Telecomunication EngineeringLingkup Jurnal Ilmiah Poli Rekayasa meliputi : 1) Energi terbarukan (rewnable energy), 2) Inovasi kendaran bermotor hemat BBM, 3) Material Maju, 4) Emisi dan pembakaran motor bakar, 5) Rekayasa termal dan fluida, 6) Rekayasa power plant, 7)Material komposit, 8) Biomaterial, 9)Teknologi pengujian tak merusak (Non Distruction Test/NDT), 10) Kontrol dan mekatronika, 11) Planing untuk pengurangan resiko bencana, 12) Sistem transportasi antar moda, 13) Rekayasa konstruksi, bangunan, jembatan dan Jalan, 14) Manajemen daerah aliran sungai, air tanah, sedimen dan waduk, 15) Remote Sensing Harap baca panduan ini dengan seksama. Penulis yang ingin mengirimkan artikel ke Jurnal Ilmiah Poli Rekayasa, harus mengikuti panduan penulisan. Jika artikel yang dikirim tidak sesuai dengan panduan penulisan atau ditulis dalam format yang berbeda, maka akan DITOLAK oleh editor sebelum ditinjau lebih lanjut. Para editor hanya menerima artikel yang memenuhi format yang ditetapkan. Artikel ditulis dalam bahasa indonesia. Jurnal Ilmiah Poli Rekayasa menggunakan prosedur penilaian Double Blind. Dimana antara penulis dengan mitra bestari tidak saling mengenal identitasnya masing-masing. Silahkan kirimkan artikel anda dan untuk unduh Template DI SINI Etika Publikasi dapat dilihat pada tautan berikut ini : ETIKA PUBLIKASI.
Arjuna Subject : -
Articles 185 Documents
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RANCANG BANGUN ANTENA MIKROSTRIP ARRAY 4X1 PATCH SQUARE UNTUK JARINGAN WIFI Aprinal Adila Asril
Jurnal Ilmiah Poli Rekayasa Vol 21, No 2 (2026): April
Publisher : Pusat Penelitian dan pengabdian kepada Masyarakat (P3M) Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/jipr.21.2.433

Abstract

This research aims to design and implement a  microstrip array 4x1 patch square antenna for a WiFi using the software CST Studio Suite 2019and using a Vector Network Analyzer for antenna testing. Some antenna parameters that were determined include return loss, bandwidth, VSWR, radial pattern, and gain. This antenna has an antenna size of 125 x 130 mm. The antenna isdesigned based on the characteristics of several antenna parameters, namelyhaving a return loss of ≤-10 dB, a gain value of ≥1 dB, and a VSWR ≤2. The type of substrate used is FR-4 (lossy) with a dielectric constant specification of 4.3, characteristic impedance of 50 ohms and thickness of 1.6 mm. The groundplane material used is copper with a thickness of 0.035 mm. The results of optimizing the microstrip array antenna parameters are a return loss of -17.72 dB with a frequency of 2.4 GHz, a VSWR value of 1.34 with a frequency of 2.4 GHz and has a unidirectional radiation pattern. Meanwhile, the return loss value for the manufactured antenna was found to be -18.7 dB with a frequency of 2.46 GHz and a VSWR value of 1.26 with a frequency of 2.46 GHz.   Keywords: Antena Mikrostrip Array,  Return loss, bandwidth, VSWR, Pola radiasi, dan gain.
SISTEM MONITORING PARAMETER BATERAI SEPEDA MOTOR LISTRIK BERBASIS IOT Muhammad Tatag Titis Prabowo; Rifano Rifano; Ery Muthoriq; Nanang Oktawidiandaru
Jurnal Ilmiah Poli Rekayasa Vol 21, No 2 (2026): April
Publisher : Pusat Penelitian dan pengabdian kepada Masyarakat (P3M) Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/jipr.21.2.434

Abstract

The rapid growth of electric vehicle adoption in Indonesia presents significant new challenges, particularly regarding the maintenance of energy storage systems, which remain the most critical components. Batteries in electric motorcycles are highly susceptible to premature degradation caused by unstable current and voltage parameters, as well as the high risk of uncontrolled temperature spikes that can trigger permanent damage or severe fire hazards. Consequently, intensive, continuous monitoring is an absolute necessity to ensure operational safety and reliability. This research focuses on developing a sophisticated prototype for a real-time electric motorcycle battery health monitoring system by integrating advanced Internet of Things (IoT) technology.The technical design of this device utilizes the high-performance ESP32 microcontroller as the primary processing unit, paired with a PZEM-017 sensor to monitor electrical variables and an RTD PT100 sensor with a MAX31865 module for precise temperature readings. All collected data is transmitted wirelessly to a dedicated cloud platform, allowing users to monitor battery status remotely via their smartphones. Furthermore, the system is equipped with an automated early warning feature via a Telegram bot, which instantly sends notifications when battery parameters fall outside safe limits, such as temperatures exceeding 35°C or voltage deviating from the optimal 42–57.6 V range.The methodology applied in this study is Research and Development (R&D) using the comprehensive ADDIE development framework. Based on a series of rigorous tests, the system demonstrated high levels of accuracy, with temperature reading success at 98.15% and voltage accuracy at 99.78%. Functional testing through the black-box method also proved that warning notifications were successfully delivered to the user's device with a perfect success rate. The implementation of this tool is expected to significantly assist users in performing preventive maintenance, thereby extending the battery's operational lifespan and overall energy 
PERENCANAAN JOB MIX FORMULA (JMF) BETON NORMAL DAN EVALUASI KUAT TEKAN BERDASARKAN SNI 03 2834 2000 Winda Fitria; Sicilia Afriyani; A Yuda Trinanda; Angga P Arlis; Wahyu Arazka; Afrizal P Prices
Jurnal Ilmiah Poli Rekayasa Vol 21, No 2 (2026): April
Publisher : Pusat Penelitian dan pengabdian kepada Masyarakat (P3M) Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/jipr.21.2.439

Abstract

Beton merupakan material konstruksi yang banyak digunakan pada pembangunan gedung, jembatan, jalan, dan berbagai infrastruktur lainnya karena memiliki kekuatan tekan yang baik, durabilitas tinggi, serta bahan penyusun yang mudah diperoleh. Untuk menghasilkan beton yang memenuhi mutu rencana diperlukan perencanaan campuran beton yang tepat melalui penyusunan Job Mix Formula (JMF). Penelitian ini bertujuan untuk menyusun JMF beton normal berdasarkan SNI 03-2834-2000 serta mengevaluasi kesesuaian mutu beton yang dihasilkan terhadap mutu rencana. Metode penelitian dilakukan secara eksperimental di laboratorium dengan tahapan pengujian karakteristik material, perencanaan campuran beton, pembuatan benda uji silinder berukuran 150 mm × 300 mm, perawatan benda uji selama 28 hari, dan pengujian kuat tekan beton. Hasil pengujian material menunjukkan bahwa agregat halus yang digunakan berada pada Zona III dengan nilai berat jenis SSD agregat kasar dan agregat halus masing-masing sebesar 2,65 dan 2,34. Berdasarkan hasil perencanaan diperoleh nilai faktor air semen (FAS) sebesar 0,55 dengan kebutuhan material per meter kubik beton berupa air 205 kg, semen 372,73 kg, agregat halus 623,62 kg, dan agregat kasar 1108,65 kg. Hasil pengujian kuat tekan beton pada umur 28 hari menunjukkan kuat tekan rata-rata sebesar 21,07 MPa, lebih tinggi dibandingkan mutu beton rencana sebesar 20,75 MPa. Hasil penelitian menunjukkan bahwa metode perencanaan campuran beton berdasarkan SNI 03-2834-2000 mampu menghasilkan beton normal yang memenuhi mutu rencana sehingga dapat digunakan sebagai pedoman dalam penyusunan Job Mix Formula pada pekerjaan konstruksi.
DESIGN AND ANALYSIS OF PATCHOULI STEM CHOPPER MACHINE USING DOUBLE BLADE KNIFE TO IMPROVE PATCHOULI OIL PRODUCTIVITY Sir Anderson; Syafira Salsabila; Nasirwan Nasirwan; Mulyadi Mulyadi; syukri syukri
Jurnal Ilmiah Poli Rekayasa Vol 21, No 2 (2026): April
Publisher : Pusat Penelitian dan pengabdian kepada Masyarakat (P3M) Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/jipr.21.2.437

Abstract

The global demand for patchouli essential oil (Pogostemon cablin Benth.) continues to grow, with Indonesia supplying approximately 70% of world demand. One critical pre-distillation process that significantly affects oil yield is the size reduction of patchouli stems. Manual chopping is time-consuming and labor-intensive, leading to production inefficiencies. This study presents the design of a patchouli stem chopper machine intended to improve patchouli oil productivity. The design methodology begins with problem identification, followed by conceptual design using morphological matrix, component calculations, and 3D modelling using SolidWorks 2020. The machine is powered by a ¼ HP AC electric motor at 1400 rpm, reduced through a pulley-belt transmission system to achieve a blade rotational speed of 525 rpm. A double-blade planer knife type was selected due to its superior cutting performance compared to the circular knife type. Calculation results show that the machine achieves a theoretical capacity of 156 kg/h with a blade cutting force of 686.41 N, shaft diameter of 25 mm (minimum 20.93 mm by Rankine theory), V-belt length of 1.7 m, key dimensions of 6×5×20 mm, and a bearing nominal lifetime of 37,044,000 hours. The use of a double-blade planer configuration offers a novelty in bidirectional cutting ability, differentiating this design from previous gasoline-engine-based machines. It should be noted that the capacity of 156 kg/h is a theoretical value derived from design calculations and has not yet been validated through actual field or laboratory testing. Field validation of the prototype's actual performance remains a limitation of this study and is recommended for future work. The machine is expected to reduce labor requirements and increase patchouli oil production efficiency.
EVALUASI KAPASITAS PENAMPANG CHECK DAM I GUNUNG NAGO TERHADAP DEBIT BANJIR sadtim sadtim; Wisafri Wisafri; Angga Putra Arlis; Ridho Wafiq Fauzan
Jurnal Ilmiah Poli Rekayasa Vol 21, No 2 (2026): April
Publisher : Pusat Penelitian dan pengabdian kepada Masyarakat (P3M) Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/jipr.21.2.436

Abstract

Padang City, the capital of West Sumatra Province, has complex topographical conditions that increase its susceptibility to flooding, particularly during periods of high rainfall intensity. One of the flood control infrastructures constructed along the Batang Kuranji River is Check Dam I Gunung Nago, which functions to reduce flood discharge and sediment transport. This study aims to evaluate the hydraulic capacity of the check dam cross-section in accommodating planned flood discharge under various return periods. The research methodology involved the collection and analysis of topographic, hydrological, and 15-year rainfall data obtained from the Gunung Nago and Ladang Padi rainfall stations. Design rainfall was analyzed using Normal, Gumbel, Log Normal, and Log Pearson Type III probability distributions, followed by goodness-of-fit tests employing the Chi-Square and Smirnov-Kolmogorov methods. Planned flood discharge was estimated using the Rational, Hasper, and Weduwen methods, as well as Snyder and Nakayasu synthetic unit hydrographs. The results indicate that the existing cross-section capacity of Check Dam I Gunung Nago is only capable of safely accommodating flood discharge with a return period of up to five years. Consequently, structural capacity enhancement and flood mitigation measures are necessary to improve the effectiveness of the check dam in flood management.

Page 19 of 19 | Total Record : 185

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