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All Journal ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika Jurnal Otomasi Kontrol dan Instrumentasi Frontiers Cendekia Niaga Prima Magistra: Jurnal Ilmiah Kependidikan Jurnal Material dan Energi Indonesia
FIRMANSYAH, VERA
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Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Social Sciences Other

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PENGARUH NOISE PROSES (Q) DAN NOISE PENGUKURAN (R) DI KALMAN FILTER YANG DIAPLIKASIKAN PADA HASIL PEMBACAAN SENSOR SUHU DHT11 DAN LM35 Firmansyah, Vera
FRONTIERS: JURNAL SAINS DAN TEKNOLOGI Vol 1, No 3 (2018): DESEMBER 2018
Publisher : Universitas Negeri Manado

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1185.823 KB)

Abstract

Noise atau gangguan merupakan parameter yang selalu muncul dalam setiap proses akuisisi data dari sebuah sensor. Pada makalah ini sensor yang digunakan adalah sensor suhu jenis DHT11 atau LM35 yang dipasangkan pada arduino mega untuk memantau suhu ruangan laboratorium massa yang telah mendapatkan ISO 17025. Data pencilan yang muncul secara tiba-tiba dapat dihilangkan atau dikurangi. Salah satu teknik yang paling sederhana dalam mengurangi noise yaitu merata-ratakan dalam selang waktu tertentu atau jumlah data tertentu sebelum ditampilkan. Makalah ini memperlihatkan proses menghilangkan noise dengan bantuan Kalman Filter agar data yang ditampilkan lebih bersih dari noise. Keberhasilan Kalman Filter dalam menghilangkan noise ditentukan oleh nilai R yang disebut kovarian noise pengukuran dan Q yang disebut kovarian noise proses. Pemiihan nilai R dan Q yang tepat dapat menentukan keberhasilan Kalman Filter dalam menghilangkan noise. Kalman Filter diaplikasikan pada sensor suhu dengan keluaran berupa tegangan jenis LM35 dan sensor suhu keluaran berupa temperature jenis DHT11 dengan bantuan library yang disediakan. Dapat disimpulkan bahwa Kalman Filter dapat mengurangi noise yang muncul dari sensor. Pemilihan nilai R dan Q juga dapat meningkatkan performa Kalman Filter. Semakin kecil nilai R dan Q maka performa Kalman Filter semakin baik. Nilai R=1e-5 dan Q=1e-8 memberikan hasil yang paling baik untuk sensor suhu jenis DHT11 dan LM35.Kata kunci: Sensor Suhu, LM35, DHT11, Kalman Filter, Arduino
STUDI PENGEMBANGAN SISTEM VISION BERBASIS KAMERA DALAM PENENTUAN POSISI MENISKUS PADA KALIBRASI GELAS UKUR GIANTO, GIANTO; FIRMANSYAH, VERA; TUNGGAL WARAS, NANDANG GUNAWAN; SUTANTO, WILI; YASRI, BUDI; MUSLIM, AZIS
Jurnal Material dan Energi Indonesia Vol 13, No 2 (2023)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/jme.v13i2.51011

Abstract

Perhitungan estimasi nilai ketidakpastian pada proses kalibrasi gelas ukur, salah satunya dipengaruhi oleh pembacaan posisi meniskus cairan dalam gelas ukur. Olehkarena sifatnya yang masih analog, maka pembacaan meniskus sangat bergantung pada kemampuan operator dalam membaca skala gelas ukur. Umumnya, operator mampu membaca skala alat ukur pada batas ½ divisi skala tanpa alat bantu. Akurasi penentuan posisi meniskus dapat ditingkatkan menggunakan sistem vision berbasis kamera, yang menjadi tujuan di dalam studi ini. Pada studi ini, dikembangkan metode olah citra digital untuk membaca volume cairan di dalam gelas ukur kapasitas 50 mL dengan resolusi 1 mL. Sebagai objek penelitian, digunakan citra sintetis dan sampel gelas ukur yang memiliki garis skala berwarna biru muda, cukup kontras dengan warna meniskus yang abu-abu. Untuk itu pada proses segmentasi, digunakan metode pemisahan warna dalam model citra HSV. Pada simulasi yang menggunakan citra sintetis, dapat ditunjukkan bahwa metode olah citra yang dikembangkan berhasil membaca volume cairan dalam gelas ukur, dengan rentang kesalahan 0,07 mL, yang disebabkan oleh sebagian tinggi meniskus cairan yang tertutup oleh garis skala yang memiliki tebal 8 piksel setara dengan 0,14 mL. Hasil eksperimen juga menunjukkan metode olah citra yang dikembangkan berhasil diterapkan pada sampel gelas ukur.
Rancang Bangun Prototipe Pemantau Temperatur Ruang Penyimpanan Anak Timbangan Standar di Unit Metrologi Legal Kabupaten Bandung Barat Firmansyah, Vera; Nuriska, Fanny; Mulyana, Teddy; Firmansyah, Dudi Adi; Yasri, Budi; Muslim, Azis; Gianto; Gunawan T.W, Nandang; Sutanto, Willi
Cendekia Niaga Vol 8 No 2 (2024): Jurnal Cendekia Niaga : Trade and Development Studies
Publisher : Pusat Pendidikan dan Pelatihan Aparatur Perdagangan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52391/jcn.v8i2.890

Abstract

The Legal Metrology Unit (UML) is a unit that carries out metrological activities in the Regency/City. UML has a vital role in achieving a well-measured market. These metrological activities include calibration and re-calibration and metrological supervision activities. One of UML's efforts to support these activities is to maintain the working standards it has, in this case, reference weights. In addition to purchasing existing measuring instruments with four sensors at once being very expensive, prototyping is the leading choice because it can be developed according to needs. This study created a prototype for monitoring the room conditions of the reference weight storage cabinet. This prototype uses four sensors integrated with a microcontroller to measure temperature simultaneously. The testing process for the prototype began with testing the temperature sensor with a standard thermocouple and water bath. Furthermore, the prototype will be tested with a standard thermohygrometer measuring instrument. The test results of the prototype for accuracy have a range of 94%-98%, precision of 97%-98%, and an error of 2%-4%. Meanwhile, the results of the measurement uncertainty of the prototype for the morning are by the provisions in the range of 0.37 °C-0.46 °C, and in the afternoon, they do not comply with the requirements, namely in the range of 0.38°C-0.61 °C.
Rancang Bangun Instalasi Uji Akurasi Meter Air untuk Studi Pengaruh Tekanan Air FIRMANSYAH, DUDI ADI; AHMAD, SAYYID AL HABBIB; PRIYATNA, ENDANG; FIRMANSYAH, VERA; SUPRIJANTO, SUPRIJANTO
ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika Vol 10, No 3: Published July 2022
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/elkomika.v10i3.529

Abstract

ABSTRAKPada distribusi air bersih kepada konsumen, tekanan permulaan biasanya dibuat lebih tinggi dan sering berubah pada saat aliran. Kondisi ini dapat mempengaruhi akurasi meter air, meskipun alat ini didesain untuk dapat beroperasi pada rentang tekanan lebar. Oleh karenanya, pada penelitian ini, prototipe instalasi uji dibuat untuk mempelajari pengaruh tekanan air pada akurasi meter air secara bersamaan. Prototipe ini terdiri dari dua pompa yang mampu menghasilkan tekanan air tinggi, sensor tekanan posisi hulu dan hilir, pengatur aliran, sensor aliran, meter air, sensor suhu, dan sebuah sistem akuisisi data nirkabel dengan perhitungan otomatis. Hasil kalibrasi menunjukan bahwa semua sensor memiliki rata-rata akurasi 99,4% dan presisi 99,7%. Hasil pengujian akurasi meter air pada kenaikan tekanan dari 0,5 bar ke 4,5 bar menunjukan nilai kesalahan meter air yang semakin meningkat dari 5,1% menjadi 7,2%, sehingga pada studi ini dapat dilakukan pengujian akurasi meter air pada tekanan air yang lebih tinggi dibandingkan dengan penelitian sebelumnya.Kata kunci: tekanan, akurasi, instalasi uji, perhitungan otomatis ABSTRACTIn the water distribution, the starting pressure is usually made higher and frequently changes during the flow. This condition can affect the accuracy of water meter, though it was designed to be operated at a wider pressure range. Therefore, a prototype of testing installation is assembled to study the effect of the water pressure to the water meter accuracy simultaneously. It consists of two pumps which able to generate high water pressure, pressure sensor (upstream and downstream), flow regulator, flowmeter sensor, water meter, temperature sensor, and wireless data acquisition system with automatic calculation. Calibration results show that all sensors have average accuracy of 99.4% and precision of 99.7%. Water meter accuracy testing results at the increasing pressure from 0,5 bar to 4,5 bar show that water meter error values increase from 5,1% to 7,2%, so this study can perform accuracy test at a higher water pressure as compared to the previous research.Keywords: pressure, accuracy, testing installation, automatic calculation
Rancang Bangun Prototipe Pemantau Temperatur Ruang Penyimpanan Anak Timbangan Standar di Unit Metrologi Legal Kabupaten Bandung Barat Firmansyah, Vera; Nuriska, Fanny; Mulyana, Teddy; Firmansyah, Dudi Adi; Yasri, Budi; Muslim, Azis; Gianto; Gunawan T.W, Nandang; Sutanto, Willi
Cendekia Niaga Vol. 8 No. 2 (2024): Jurnal Cendekia Niaga : Trade and Development Studies
Publisher : Pusat Pengembangan Kompetensi Aparatur Perdagangan

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The Legal Metrology Unit (UML) is a unit that carries out metrological activities in the Regency/City. UML has a vital role in achieving a well-measured market. These metrological activities include calibration and re-calibration and metrological supervision activities. One of UML's efforts to support these activities is to maintain the working standards it has, in this case, reference weights. In addition to purchasing existing measuring instruments with four sensors at once being very expensive, prototyping is the leading choice because it can be developed according to needs. This study created a prototype for monitoring the room conditions of the reference weight storage cabinet. This prototype uses four sensors integrated with a microcontroller to measure temperature simultaneously. The testing process for the prototype began with testing the temperature sensor with a standard thermocouple and water bath. Furthermore, the prototype will be tested with a standard thermohygrometer measuring instrument. The test results of the prototype for accuracy have a range of 94%-98%, precision of 97%-98%, and an error of 2%-4%. Meanwhile, the results of the measurement uncertainty of the prototype for the morning are by the provisions in the range of 0.37 °C-0.46 °C, and in the afternoon, they do not comply with the requirements, namely in the range of 0.38°C-0.61 °C.
LEARNING BY LIVING: ACCULTURATION, LEADERSHIP, AND REFLEXIVITY IN BANCEUY’S INFORMAL ADULT EDUCATION ECOSYSTEM Yasri, Budi; Firmansyah, Vera; Firmansyah, Dudi Adi; Nurhayati, Sri; Gianto, Gianto; Mutmainnah, Disa Aisha; Lotfi, Fatima Zahra; Olugbade, Damola; Ahsan, Md. Hafizi; Boriboon, Gumpanat
Prima Magistra: Jurnal Ilmiah Kependidikan Vol. 6 No. 3 (2025): Volume 6 Number 3 (July 2025)
Publisher : Program Studi PGSD Universitas Flores

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37478/jpm.v6i3.5680

Abstract

Despite increasing recognition of Indigenous knowledge systems, the role of informal adult learning within customary communities remains under-theorized in mainstream adult education discourse. There is limited understanding of how traditional practices, beliefs, and community structures shape learning processes outside formal institutions. This study investigates the role of informal adult learning in Kampung Adat Banceuy, a Sundanese customary village in West Java, Indonesia. The research focuses on how learning is embedded in four interconnected domains: customary leadership, ritual practice, selective acculturation, and community-based tourism. These domains form a cohesive learning ecology through which cultural knowledge, social roles, and ethical values are transmitted and adapted across generations. Using an ethnographic methodology, the study involved participant observation, semi-structured interviews with 36 informants, and analysis of cultural documents. Data were examined through thematic coding and interpretive analysis to capture the nuanced, situated processes of learning as enacted in everyday life. Findings show that informal adult learning in Banceuy is relational, embodied, and performative. Tourism, in particular, functions as a reflexive learning environment where adults develop narrative, logistical, and intercultural competencies while negotiating cultural meaning and ethical boundaries. Rather than being a site of commodification, tourism becomes a space of identity work and adaptive pedagogy. These insights challenge conventional hierarchies of formal education and affirm the centrality of Indigenous learning systems in sustaining cultural resilience. The study offers implications for policy and theory, emphasizing the need to support culturally embedded, community-driven models of adult education.
Pemanfaatan Sensor Ultrasonik Sebagai Alat Bantu Pembacaan Skala Volume Pada Bell Prover Firmansyah, Vera; Hadisupadmo, Sutanto; Elviya, Faiza; Jannah, Shaqina Rahmiatul
Jurnal Otomasi Kontrol dan Instrumentasi Vol 12 No 1 (2020): Jurnal Otomasi Kontrol dan Instrumentasi
Publisher : Pusat Teknologi Instrumentasi dan Otomasi (PTIO) - Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/joki.2020.12.1.1

Abstract

AbstrakFasilitas laboratorium pengujian meter gas di Direktorat Metrologi Kementerian Perdagangan menggunakan bell prover sebagai standar. Bell prover yang tersedia masih menggunakan skala jenis mekanis dengan rentang 100 "“ 600 liter dan 1 liter per skala. Ketidaktepatan membaca skala mekanis dapat mempengaruhi hasil pengujian meter gas. Untuk itu dibuat alat bantu pembacaan volume bell prover dengan sensor ultrasonik tipe HC-SR04 yang dipasang pada arduino. Alat bantu ini memanfaatkan jarak bobot pengatur kecepatan pada bell proverterhadap lantai. Perubahan ketinggian bobot pengatur kecepatan sebanding dengan perubahan ketinggian skala volume. Alat bantu ini memiliki akurasi terkecil sebesar 83,17% dan kesalahan sebesar 16,83% pada volume 100 liter, sedangkan akurasi tertinggi sebesar 99,76% dan kesalahan terkecil sebesar 0,02% pada volume 600 liter.
Prototipe Alat Bantu Pengukur Diameter Cincin Referensi Tangki Ukur Tetap Silinder Tegak Firmansyah, Vera; Putriyati Ningsih, Dwi; Maulana, Yusuf; Zahra, Naila
Jurnal Otomasi Kontrol dan Instrumentasi Vol 14 No 1 (2022): Jurnal Otomasi Kontrol dan Instrumentasi
Publisher : Pusat Teknologi Instrumentasi dan Otomasi (PTIO) - Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/joki.2022.14.1.5

Abstract

Tangki Ukur Tetap Silinder Tegak (TUTSIT) selain dapat berfungsi sebagai alat penyimpanan dapat juga berfungsi sebagai alat ukur. Untuk menjaga akurasi hasil pengukuran, setiap alat ukur perlu dilakukan pengujian/kalibrasi. Terdapat beberapa metode untuk menguji TUTSIT, salah satunya metode optik dengan teodolit yang memiliki kelebihan yaitu waktu pengujian singkat dan keperluan jumlah personil yang sedikit. Selain kelebihan tersebut, teodolit tetap memiliki kekurangan yaitu harga yang mahal, menggunakan personil khusus, dan pengolahan data masih manual. Pengujian TUTSIT memanfaatkan fungsi teodolit untuk pengukuran sudut dan pengukuran jarak. Pada makalah ini membuat prototipe yang dapat mengukur diameter cincin referensi sebagai langkah awal pengujian TUTSIT. Diameter referensi ini sebagai acuan untuk pengukuran diameter pada cincin di atasnya. Proses pengujian prototipe yaitu dengan membandingkan terhadap teodolit pada posisi yang sama. Hasil pengukuran diameter cincin referensi oleh prototipe lebih besar 15,8 mm dibandingkan dengan teodolit. Adapun nilai-nilai karakteristik prototipe untuk akurasi sebesar 99,2%, presisi sebesar 99,9% dan kesalahan sebesar 0,8%. Prototipe ini memiliki potensi untuk dikembangkan sebagai alternatif ekonomis instrumen pengujian TUTSIT.
Prototipe Penekan Tombol Otomatis Simulator Meter kWh Untuk Pengisian Token Berbasis Mikroprosesor dan API Telegram Firmansyah, Vera; Oktaviyana, Karlina; Fathan, H. Syauqi; Muslim, Azis; Firmansyah, Firmansyah; Gunawan TW, Nandang; Sutanto , Willi; Gianto, Gianto
Jurnal Otomasi Kontrol dan Instrumentasi Vol 16 No 2 (2024): Jurnal Otomasi Kontrol dan Instrumentasi
Publisher : Pusat Teknologi Instrumentasi dan Otomasi (PTIO) - Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/joki.2024.16.2.7

Abstract

The change of payment method for electrical energy to prepaid by the Perusahaan Listrik Negara (PLN) is based on the increase in the use of electrical power, and there are areas for improvement in the postpaid system. The prepaid method uses the Standard Transfer Specification (STS) system, users enter a 20-digit token number on the kWh by pressing the kWh meter keyboard, but there are some things that could be improved if they look at the placement of the kWh meter. The user's mobility is very high. The Internet of Things (IoT) system of the kWh meter automatic button press aims to make it easier for users. The prototype uses critical components such as Raspberry PI 3B as a microprocessor, telegram as user input and output, and 12 solenoids as a keypress medium. System feasibility testing is carried out by testing the accuracy of suppression, filling time, and the receipt of messages on bot telegrams. Accuracy for each button with a test of 20 presented at a delay of 2.00 seconds to 0.04 seconds got 100% accurate results. Tested the charging time with a 100% curated delay results in the fastest time with the highest accuracy rate on a delay of 0.10 seconds to 0.04 seconds faster when compared to manual charging. On the receipt of telegram messages, get 100% test results with the consideration of 13 letters received by users. Further development can be done considering the bot display, user inputs and outputs, and customized containers on the kWh meter.
Perancangan Purwarupa Pengukur Kadar Air dan Kualitas Pangan Komoditas Beras dan Jagung Menggunakan Sensor Kapasitif Firmansyah, Dudi; Rahmawati, Riski Amalia; Firmansyah, Vera; Gianto, Gianto; Sutanto, Willi; Waras, Nandang Gunawan Tunggal; Yasri, Budi; Muslim, Azis; Irwanto, Decky Ari; Karsono, Eko; Alam, Hilman Syaeful; Sanjaya, Ari Susandy
Jurnal Otomasi Kontrol dan Instrumentasi Vol 16 No 2 (2024): Jurnal Otomasi Kontrol dan Instrumentasi
Publisher : Pusat Teknologi Instrumentasi dan Otomasi (PTIO) - Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/joki.2024.16.2.6

Abstract

Water content is an indicator that can affect food quality and safety as well as commodity prices. Therefore, measuring the moisture content of commodities is important to ensure the food system viability. The development of increasingly sophisticated technology has led many companies to introduce water content measuring instruments called Moisture Content Meters (MCM). However, this tool is marketed at an expensive price. In this research, a prototype for measuring the moisture content and food quality of rice and corn commodities using a cheap capacitive sensor has been successfully made according to the design. Based on the testing results, this prototype has an accuracy value of 98,9%, precision of 97,4%, and error of 1,1%. The test results show that this prototype is accurate enough to measure the moisture contents of rice and corn samples, accompanied by consistent food quality indications according to applicable quality standards.  
Co-Authors Adi Sutanto AHMAD, SAYYID AL HABBIB Ahsan, Md. Hafizi Ari Susandy Sanjaya, Ari Susandy Azis Muslim, Azis Boriboon, Gumpanat Elviya, Faiza Fathan, H. Syauqi Firmansyah Firmansyah Firmansyah, Dudi Firmansyah, Dudi Adi Gianto Gianto Gianto Gunawan T.W, Nandang Gunawan TW, Nandang Hilman Syaeful Alam Irwanto, Decky Ari Jannah, Shaqina Rahmiatul Karsono, Eko Lotfi, Fatima Zahra Mulyana, Teddy Mutmainnah, Disa Aisha Nuriska, Fanny Oktaviyana, Karlina Olugbade, Damola PRIYATNA, ENDANG Putriyati Ningsih, Dwi Rahmawati, Riski Amalia Sri Nurhayati Suprijanto Suprijanto Sutanto , Willi SUTANTO, WILI Sutanto, Willi TUNGGAL WARAS, NANDANG GUNAWAN Waras, Nandang Gunawan Tunggal Yasri, Budi Yusuf Maulana, Yusuf Zahra, Naila