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PENGARUH KADAR AIR DI DALAM BRAKE FLUID TERHADAP KARAKTERISTIK GELEMBUNG PADA PROSES PEMANASAN BRAKE FLUID Wijayanta, Setya; Humami, Faris; Wibowo, Helmi; Kristiawan, Komang Andre; Lazuardi, Wildan Surya
Jurnal Rekayasa Mesin Vol. 15 No. 1 (2024)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v15i1.1705

The present study aimed to determine the effect of the percentage of water in brake fluid on the boiling point and the characteristics of bubble formation (the beginning of vapor lock) during the brake fluid heating process. DOT 3 Brake Fluid and water were used as the working fluid in the present study. To vary the water content in the brake fluid, water was mixed into the DOT 3 Brake Fluid. The water percentages in the mixture were 0, 1, 3, and 4%. The boiling point of brake fluid with four variations in the water content percentage was measured by using a digital thermometer. The characteristics of bubble formation in brake fluid were observed using a video camera with a frame rate of 240 fps. The video recording results were extracted into an image file with a jpeg extension and processed further using image processing with ImageJ software to measure the total cross-sectional area and bubble fraction. This is the novelty of the present study, where measurements of the total cross-sectional area and bubble fraction in boiling brake fluid with variations in water content have never been carried out by researchers before. Apart from that, the ImageJ measurement method has advantages compared to other software. ImageJ is free software that is easy to download from the internet, easy to use, accurate and the measurement results are displayed immediately. The research results show that an increase in the percentage of the water content in brake fluid affects reducing the boiling point of the brake fluid. At the same temperature, the greater the percentage of water content in the brake fluid, the total cross-sectional area and bubble fraction also increase. At the same percentage of water content, the total cross-sectional area and bubble fraction also increase as the temperature increases. Apart from that, in this research, an empirical equation was successfully developed to predict the brake fluid's boiling point based on its water content, and an empirical equation to predict the bubble fraction based on the water content and temperature of the brake fluid. This is a novel result of this research that has never been produced in previous research.

PROTOTYPE OF INSPECTION EXHAUST BRAKE VEHICLE BASED MICROCONTROLLER Pramudi, Setia Hadi; Abdillah, Dzikri Putra; Wibowo, Helmi; Suartika, I Made
Journal of Energy and Electrical Engineering Vol 5, No 1: Oktober 2023
Publisher : Teknik Elektro Universitas Siliwangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37058/jeee.v5i1.8546

Technical requirement checking relating exhaust brake on vehicle inspection is still lacking because there is no additional equipment which can helps to ensure the exhaust brake works. From that case a set of research is conducted to help inspectors to ensure the exhaust brake works normallyÂ by using microcontroller based prototype. This research aims to design and implement the inspect equipment of exhaust brake using sound sensor DFr and air Sensor. The process requires 3 inspectors and by using this tool, inspectors could ensure the exhaust brake works or not for hino vehicle. This research shows that measuring by using this auxiliary tool for checking the exhaust brake could inform the fluctuation of sound produced by vehicle machine and decreasing air on exhaust brake system. The result of its prototype testing, the sound sensor is able to detect the increasing of sound and if the sound level reaches 80 dB, there will be a green as warning LED and l2c LCD displays the noise level and the prototype could works properly, the accuracy percentage is 97% and for the air Sensorâ€™s accuracy is 92%

MICROCONTROLLER-BASED VEHICLE TESTING UNITS: ALTERNATIVE SPEED MEASUREMENT TOOLS IN SPEEDOMETER TESTING Wibowo, Helmi; Laksana2, Tri Adi; Srianto, Srianto
Journal of Energy and Electrical Engineering Vol 5, No 2: April 2024
Publisher : Teknik Elektro Universitas Siliwangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37058/jeee.v5i2.10544

The use of the Speedometer Tester test equipment that is currently available has not been fully implemented in motorizedvehicle testing units. One of the causes is the test equipment which is constrained due to damage caused by long -term use.This research discusses the design of microcontroller-based speed measuring devices as an alternative to the use of testequipment in speedometer testing when problems occur in the form of damage to the test equipment in the Motor VehicleTesting Unit. This type of research is development or Research and Development (RD) which aims to produce new productsor improve existing products. Design of a Microcontroller-Based Speed Measuring Device consisting of an input, namely anInfared Proxlimity Sensor, then an Arduino process control with an LCD output connected to a Thermal Print er which canprint measurement results. Based on the test results of the design tool for speed measuring devices on microcontroller -basedmotorized vehicle testing units, an average success rate of 97.9% was obtained, and an average deviation of 2.1%. Thedesign performance of a microcontroller-based speed measuring device can function according to the program designed.

PURWARUPA HAZARD PINTAR PADA KENDARAAN MPV Wibowo, Helmi; Sabrina, Sabrina; Srianto, Srianto
Journal of Energy and Electrical Engineering Vol 4, No 2: 13 April 2023
Publisher : Teknik Elektro Universitas Siliwangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37058/jeee.v4i2.6372

The use of Hazard lights on vehicles is not in accordance with traffic rules so that it often results in accidents. Hazard lights are widely misused and often confuse the driver behind. Based on this, the study made a smart Hazard tool to minimize the number of accidents. The research method used in this study is an experimental method. This smart Hazard makes the Hazard lights turn off automatically without pressing the Hazard light switch when the right and left turn signals are turned on.Â This tool can be simulated in Multi Purpose Vehicle (MPV) type vehicles with negative controllers and only requires a very small power of 0.398 Watts when the hazard lights are on and the turn signal is on so as not to make the battery consumption large and the voltage considered reasonable so as not to affect other electricity.

RANCANG BANGUN PENDETEKSI KEBOCORAN GAS LPG DAN KEBAKARAN PADA ANGKUTAN BARANG BERBAHAYA BERBASIS INTERNET OF THINGS Yusuf Ramadhan, Hafid; Munawirul Khija, Muhamad; Wibowo, Helmi; Hadi Pramudi, Setia; Hardimansyah, Risky
Berkala Forum Studi Transportasi antar Perguruan Tinggi Vol. 2 No. 1 (2024): Berkala Forum Studi Transportasi antar Perguruan Tinggi
Publisher : Prodi Teknik Sipil, Fakultas Teknik, Universitas Jember dan Forum Studi Transportasi antar Perguruan Tinggi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/berkalafstpt.v2i1.914

ABSTRAKKebocoran gas LPG pada angkutan barang berbahaya yang menyebabkan kebakaran pada kendaraan merupakan masalah kritis yang perlu penyelesaian segera. Jika dibiarkan, masalah ini dapat semakin meningkat, berakibat pada peningkatan kasus kebakaran kendaraan bermotor angkutan barang berbahaya. Penelitian ini bertujuan untuk meningkatkan keselamatan dan keamanan kendaraan bermotor serta masyarakat sekitar. Sistem melibatkan pemasangan sensor gas dan sensor api yang terhubung dengan Internet of Things (IoT) melalui ESP8266, dengan aplikasi berbasis platform dan alarm. Sensor-sensor ini dapat mendeteksi kebocoran gas LPG atau perubahan suhu yang mengindikasikan adanya kebakaran. Penelitian ini menggunakan metode kuantitatif dengan jenis penelitian eksperimental. Data yang dikumpulkan oleh sensor dikirimkan secara real-time ke platform untuk analisis dan tindakan responsif. Dengan sistem ini, diharapkan kebocoran gas LPG atau kebakaran dapat dideteksi lebih awal, memungkinkan tindakan pencegahan yang cepat dan efektif untuk menghindari kebakaran yang lebih besar dan kerugian yang potensial signifikan. ABSTRACTLPG gas leaks in Dangerous Goods transport that cause fires in vehicles are critical problems that need immediate resolution. If left unchecked, this problem can increase, increasing in cases of motor vehicle fires transporting Dangerous Goods. This research aims to improve the safety and security of motor vehicles and the surrounding community. The system involves installing gas sensors and fire sensors connected to the Internet of Things (IoT) via ESP8266, with platform-based applications and alarms. These sensors can detect LPG gas leaks or temperature changes that indicate a fire. This research uses quantitative methods with experimental research types. Data collected by sensors is transmitted in real-time to the platform for analysis and responsive action. With this system, it is expected that LPG gas leaks or fires can be detected early, allowing for quick and effective preventive measures to avoid larger fires and potentially significant losses.

ANALISIS ERGONOMI KURSI PENGEMUDI BUS MENGGUNAKAN METODE POSTURE EVALUATION INDEX (PEI) BERBASIS VIRTUAL ENVIRONMENT MODELLING Khasianto, Khoirin Totok; Purwanyoto, Agus Budi; Wibowo, Helmi
Journal of Industrial Engineering and Technology Vol 5, No 1 (2024): Desember 2024
Publisher : Universitas Muria Kudus

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24176/jointech.v5i1.13046

Salah satu faktor penyebab kecelakaan bus adalah pengemudi yang mengalami kelelahan pada saat bekerja oleh karena itu pekerjaan mengemudi merupakan pekerjaan yang sangat berisiko tinggi mengalami kelelahan kerja atau disebut juga dengan muskuloskeletal disorder. Penelitian ini menggunakan metode Posture Evaluation Index dimana metode merupakan suatu pengembangan dari fitur TAT yang ada di dalam software jack 8.4. Dari hasil penelitian ini menghasilkan penurunan nilai PEI dari desain kursi awal dan kursi perbaikan 1 adalah LBA sebesar 207, OWAS sebesar 1, RULA sebesar 0, dan nilai PEI sebesar 0,247 sedangkan perbandingan antara kursi awal dan kursi perbaikan 2 adalah LBA sebesar 327, OWAS sebesar 2, RULA sebesar 0, dan nilai PEI sebesar 0,517.

ENHANCING VEHICLE SPEED MEASUREMENT WITH WEB-BASED CAMERA INTEGRATION Wibowo, Helmi; Sugiyarto, Sugiyarto; Febriansyah, Nuril Akbar
Journal of Energy and Electrical Engineering Vol 6, No 1: Oktober 2024
Publisher : Teknik Elektro Universitas Siliwangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37058/jeee.v6i1.12230

Currently there is a development of speed measuring devices, but the testing process is still lacking ergonomics and safety factors. There are still many Speedometers with no storage of results or less informative printed evidence such as passing information and lack of monitoring aids such as cameras. This research is a development research using the Research and Development (RD) level 3 method, namely conducting research on existing products and testing the effectiveness of these products. The design of this tool consists of inputs, namely laser sensors, push buttons, batteries, and power supplies. Then the control uses arduino nano and ESP32 with the output of a thermal printer, website, and 20×4 LCD. The performance of the tool is good, works according to the design, and reads well and clearly. The website is valid, works well, and as expected. Camera performance is good enough when connected to a laptop through the DroidCam application. Based on the results of testing the tool using 50 vehicle samples with the results of an average error value of 2.23% or equal to 0.89 km / hour. While the average accuracy or success rate of the measurement results is 97.77%. There are 5 error measurements from 50 vehicle samples or there is 1 error vehicle every 10 measurements.

PENGARUH KADAR AIR DI DALAM BRAKE FLUID TERHADAP KARAKTERISTIK GELEMBUNG PADA PROSES PEMANASAN BRAKE FLUID Wijayanta, Setya; Humami, Faris; Wibowo, Helmi; Kristiawan, Komang Andre; Lazuardi, Wildan Surya
Jurnal Rekayasa Mesin Vol. 15 No. 1 (2024)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v15i1.1705

The present study aimed to determine the effect of the percentage of water in brake fluid on the boiling point and the characteristics of bubble formation (the beginning of vapor lock) during the brake fluid heating process. DOT 3 Brake Fluid and water were used as the working fluid in the present study. To vary the water content in the brake fluid, water was mixed into the DOT 3 Brake Fluid. The water percentages in the mixture were 0, 1, 3, and 4%. The boiling point of brake fluid with four variations in the water content percentage was measured by using a digital thermometer. The characteristics of bubble formation in brake fluid were observed using a video camera with a frame rate of 240 fps. The video recording results were extracted into an image file with a jpeg extension and processed further using image processing with ImageJ software to measure the total cross-sectional area and bubble fraction. This is the novelty of the present study, where measurements of the total cross-sectional area and bubble fraction in boiling brake fluid with variations in water content have never been carried out by researchers before. Apart from that, the ImageJ measurement method has advantages compared to other software. ImageJ is free software that is easy to download from the internet, easy to use, accurate and the measurement results are displayed immediately. The research results show that an increase in the percentage of the water content in brake fluid affects reducing the boiling point of the brake fluid. At the same temperature, the greater the percentage of water content in the brake fluid, the total cross-sectional area and bubble fraction also increase. At the same percentage of water content, the total cross-sectional area and bubble fraction also increase as the temperature increases. Apart from that, in this research, an empirical equation was successfully developed to predict the brake fluid's boiling point based on its water content, and an empirical equation to predict the bubble fraction based on the water content and temperature of the brake fluid. This is a novel result of this research that has never been produced in previous research.

Pengembangan Ergonomi Kursi Belajar Berbasis Desain dan Simulasi Elemen Hingga Aravy, Mochammad Avrieza Havies; Sukoco, Leonardo Paksi; Al Bana, Nurrahim Hasan; Rosyid, Muhamad Burhanudin; Wibowo, Helmi
Jurnal Promotif Preventif Vol 8 No 6 (2025): Desember 2025: JURNAL PROMOTIF PREVENTIF
Publisher : Fakultas Kesehatan Masyarakat Universitas Pancasakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47650/jpp.v8i6.2387

Kursi belajar yang tidak sesuai prinsip ergonomi dapat menimbulkan ketidaknyamanan dan meningkatkan risiko musculoskeletal disorders (MSDs) pada pengguna. Penelitian ini bertujuan menghasilkan desain kursi belajar ergonomis yang aman dan stabil secara struktural melalui pemodelan CAD dan simulasi Finite Element Method (FEM). Bahan penelitian meliputi data sekunder antropometri mahasiswa Indonesia usia 18-25 tahun dari Database Antropometri Nasional (n=1.500) sebagai dasar penentuan dimensi kursi, data sifat mekanik material aluminum alloy 6061-T6, serta standar ergonomi SNI 9011:2021 dan ISO 9241-5. Pemodelan geometri dilakukan menggunakan SolidWorks 2022, sedangkan analisis pembebanan statis sebesar 600 N menggunakan SolidWorks Simulation Static. Parameter evaluasi meliputi tegangan von Mises, regangan ekuivalen, deformasi total, dan faktor keamanan. Hasil simulasi menunjukkan tegangan maksimum 126,8 MPa (46% tegangan luluh) yang masih berada di bawah tegangan luluh material, regangan yang tetap berada pada rentang elastis, serta deformasi 7,77 mm yang masih dapat diterima untuk struktur kursi ringan. Nilai faktor keamanan minimum 2,17 mengindikasikan bahwa desain kursi berada dalam batas aman untuk penggunaan sehari-hari. Dari perspektif kesehatan, desain ini berpotensi mengurangi risiko MSDs melalui kesesuaian antropometri yang mempertahankan kurva lumbar alami dan fleksibilitas terkontrol yang mendukung sirkulasi darah selama aktivitas belajar berkepanjangan. Penelitian ini menyimpulkan bahwa desain kursi hasil redesign memenuhi kelayakan struktural dan berpotensi memberikan kontribusi signifikan dalam upaya pencegahan keluhan muskuloskeletal di lingkungan pendidikan tinggi.

Real-Time IoT-Enabled Multi-Modal Warning System for Preventing Vehicular Brake Fade Accidents Yulio, Brian Adam Dwi; Marwanto, Riza Phahlevi; Shofiah, Siti; Humami, Faris; Muthoriq, Ery; Wibowo, Helmi
Jurnal Listrik, Instrumentasi, dan Elektronika Terapan Vol 7, No 1 (2026)
Publisher : Departemen Teknik Elektro dan Informatika Sekolah Vokasi UGM

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/juliet.v7i1.109520

Brake fade due to excessive heat remains a leading cause of vehicular accidents, particularly among heavy-duty and public transportation vehicles. This issue is exacerbated by the limitations of conventional brake monitoring systems that lack real-time response capabilities. To address this challenge, this study develops a Smart Brake Thermal Management system based on Internet of Things (IoT) technology, designed to detect and deliver multi-modal alerts in response to potential brake overheating. The system integrates precision thermocouple sensors, an ESP32 microcontroller, an OLED display, and cloud-based notifications via Telegram. Using a Research and Development (R&D) methodology, the system was validated through six controlled road tests under standardized conditions. Results indicate high temperature measurement accuracy at 98.07% and 98.62% for dual sensor configurations, with system response times of less than two seconds. The warning mechanism effectively delivered synchronized notifications via visual indicators, audible alerts, and instant messaging. This system demonstrated a strong ability to identify the risk of brake fade before critical failure occurred, enhancing vehicular safety significantly. Its modular design and cost-effective implementation also make it suitable for large-scale retrofitting in existing vehicle fleets. The primary contributions of this research include the integration of multi-modal warning systems, real-time thermal monitoring through cloud connectivity, and a predictive approach to brake temperature management that improves proactive safety interventions.

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