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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.

Sistem Pengawasan Perilaku Pengemudi Berbasis IoT Dengan Pemanfaatan LiDAR dan GPS Untuk Meningkatkan Keselamatan Berkendara Wibowo, Helmi; Faza Asfarin Ajrun Adhim
Infotekmesin Vol 16 No 2 (2025): Infotekmesin: Juli 2025
Publisher : P3M Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/infotekmesin.v16i2.2823

In 2022, a total of 139,258 traffic accidents occurred in Indonesia, encompassing all types of incidents, from minor to fatal. The high number of accidents, particularly those caused by speeding and unsafe following distances, highlights the need for a system capable of automatically monitoring and intervening in driver behavior. This study aims to develop an IoT-based control and monitoring system that not only detects violations such as overspeeding and insufficient following distance but also provides direct intervention in vehicle speed. The system utilizes an Arduino Mega and ESP32, equipped with GPS and LiDAR sensors, along with a DAC output to limit the accelerator pedal voltage when repeated violations are detected. Testing was conducted to evaluate sensor accuracy, IoT performance, and the effectiveness of speed intervention. The results showed a 100% success rate in five speed intervention tests, good sensor accuracy, and IoT notifications successfully delivered with an average delay of 5.9 seconds. The system proved to be effective and feasible as a technology-based solution to enhance driving safety.

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.

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