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All Journal ELKHA : Jurnal Teknik Elektro Bulletin of Electrical Engineering and Informatics Jurnal Ilmiah Teknik Elektro Komputer dan Informatika (JITEKI) ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika PROtek : Jurnal Ilmiah Teknik Elektro Jurnal ELTIKOM : Jurnal Teknik Elektro, Teknologi Informasi dan Komputer CIRCUIT: Jurnal Ilmiah Pendidikan Teknik Elektro Jurnal Elementer (Elektro dan Mesin Terapan) Techne : Jurnal Ilmiah Elektroteknika Buletin Ilmiah Sarjana Teknik Elektro Journal of Industrial Engineering JEEE- Journal of Electrical And Electronics Engineering Jurnal Ilmiah Teknik Elektro
Erwin Sitompul
President University
Aerospace Engineering Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Control & Systems Engineering Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Mechanical Engineering Other

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Impact of Cripple Part Storage Management System Improvement on the Overall Equipment Effectiveness in an Automotive Spare Part Manufacturing Company Erwin Sitompul; Muhammad Junedi; Antonius Suhartomo
JIE Scientific Journal on Research and Application of Industrial System Vol 8, No 2 (2023)
Publisher : President University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33021/jie.v8i2.4683

Abstract

Improving productivity and performance is a continuous process in all manufacturing companies. Since a product fabrication process mostly consists of many production and work steps, there is always an opportunity for small improvement. If conducted consistently and continually, a series of small improvements can yield a considerable increase in overall productivity and performance. In this paper, the effort undertaken in an automotive spare part manufacturing company to reduce downtime due to the dandori process is presented. Dandori is the installation or setup required between the production of two different spare part types. The setup includes stocking in incomplete lots of product, or the cripple parts, of one type and stocking out the cripple parts of the other. The existing dandori process consisted of 12 steps and required 190.2 seconds. The development of a storage management system was proposed to reduce the downtime required to fill the production check sheets and to find the correct drawer in the storage room. The new dandori process consists of 19 steps and requires 140.4 seconds. The manual check sheet filling was replaced with QR code scanning and data input on a computer, while the manual finding of the correct drawer was assisted by the LED indicators. Production data for the duration 4 months before and 4 months after the improvement was analyzed. The availability rate of the process increases from 84.87% to 89.34%, and the overall equipment effectiveness (OEE) increases from 73.11% to 78.37%. The obvious increases encourage further continuous improvement cycle in the company.
Image classification of fabric defects using ResNet50 deep transfer learning in FastAI Sitompul, Erwin; Leonhart Setiawan, Vincent; Jaya Tarigan, Hendra; Galina, Mia
Bulletin of Electrical Engineering and Informatics Vol 13, No 5: October 2024
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/eei.v13i5.8218

Abstract

One of the most common issues in manufacturing is the inability to persistently maintain good quality, which can lead to product defects and customer complaints. In this research, the novel implementation of deep learning for fabric defect classification in FastAI was proposed. The residual network structure of ResNet50 was trained through transfer learning to classify the data set that contained five classes of fabric images: good, burned, frayed, ripped, and stained. A novel approach to constructing the data set was undertaken by compiling randomly downloaded fabric images within the aforementioned five classes with a broad variety from the internet. The effect of the two splitting methods in dividing the data into training and validation data was investigated. Random splitting divides the data into random class proportions, while stratified splitting maintains the original class proportions. Models were tested offline with unseen data and reached a mean accuracy of 92.5% for the 2-class model and 70.3% for the 5-class model. Based on the attained accuracy and precision, no splitting method was superior to the other. The feasibility of the system’s online implementation was evaluated by integrating a smartphone camera to capture and classify fabric samples, with a mean accuracy of 75.6% for the 5-class model.
Prepaid RFID-based Electricity Payment System for Rooming Houses Sitompul, Erwin; Syirli, Khoerrudin
Jurnal ELTIKOM : Jurnal Teknik Elektro, Teknologi Informasi dan Komputer Vol. 4 No. 2 (2020)
Publisher : P3M Politeknik Negeri Banjarmasin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31961/eltikom.v4i2.205

Abstract

A prepaid RFID-based electricity payment system is proposed in this paper. The system is intended for rooming houses where residents’ electricity overconsumption and outstanding payment are to be avoided by the house owner. An RFID-card is used as the payment instrument. The system consists of two units, the card balance top-up unit (CTU) and the energy credit top-up unit (ETU). The balance of the RFID-card is topped up by using the CTU. With the balance stored in it, the RFID-card is to be used to top-up the energy credit at the ETU. Each of the CTU and the ETU is equipped with a microcontroller, an RFID reader/writer and a user interface in the form of keypad and liquid crystal display (LCD). Furthermore, the ETU utilizes a relay to control the flow of electricity. If the energy credit of a room is exhausted, then the supply of electricity to the room is cut off by the relay. The electricity consumption is calculated based on the number of pulses of the calibration LED of a standardized electronic energy meter. The pulse is transmitted to the microcontroller by using an optocoupler. The RFID-card records the current card balance, the card’s top-up history, and the card’s usage history. The energy credit is stored in the EEPROM of the ETU’s microcontroller. The energy meter is tested to measure the energy consumption of two loads based on the pulses of its calibration LED. The actual power of the two loads are 87.25 % and 94.23 % of the corresponding power rating. The card balance top-up process at the CTU and the energy credit top-up process at the ETU are successfully checked. After every balance top-up and credit top-up, the current card balance is calculated and stored correctly. During the electricity usage, the LCD of the ETU shows the remaining energy credit in IDR and kWh. These are accumulatively reduced every time the pulse count reaches a certain reset number, which corresponds to the electrical energy’s unit price applied. The proposed electricity payment system can be a solution for owners of rooming houses to secure electricity payments from the residents. The installation cost of the system is low and without the need to change the existing electricity purchase method of the house. The house owner also can individually adjust the maximum power limit for each room.
Design of an Arduino-Based Boat Roll Stabilizer System Prototype Using MPU6050 Sensor Sitompul, Erwin; Prabowo, Andri Setia; Tarigan, Hendra; Suhartomo, Antonius
Circuit: Jurnal Ilmiah Pendidikan Teknik Elektro Vol 8, No 2 (2024)
Publisher : PTE FTK UIN Ar-Raniry

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22373/crc.v8i2.23124

Abstract

In the midst of lakes or oceans, boats used for recreational fishing that are left immobile are more vulnerable to rolling waves or wind. This study was conducted to develop a prototype of the boat's stabilization system and control scheme in order to address the stability issue with the craft. Based on the prototype concept, a small boat was constructed with a control loop that included two DC motors, a motor driver, a gyroscope MPU6050, and an Arduino Uno microcontroller. A prototype stabilizer was used to evaluate two different sets of control parameters, and in both situations the stabilizer was able to provide the boat with critical interference before bringing it back to a vertical position. PWM 1 level change rate (Pulse-Width-Modulation) yields better results than 4 level change rates (PWM), with faster stabilization achievement. (1,12 seconds versus 2,46 second). In the development of the prototype, it is necessary to test the implementation of the system on the boat to the actual size. 
PID Controller with an Override Mode for a Wall-Following Robot with a Rotating Sensor Compartment Sitompul, Erwin; Rohmawan, Elan; Silitonga, Arthur; Bukhori, Iksan
ELKHA : Jurnal Teknik Elektro Vol. 16 No.2 October 2024
Publisher : Faculty of Engineering, Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/elkha.v16i2.84708

Abstract

This paper presents the design of a wall-following robot (WFR) with a rotating sensor compartment to reduce the number of distance sensors used. Two infrared (IR) sensors were fitted in the compartment that rotates back and forth at 45 °, producing four measurement values at each rotation cycle. The WFR was regulated using a novel control scheme of PID controller with an override mode. A discrete PID controller in position form was used to run the WFR to follow straight wall segments or walls turning left, while an override mode governed the WFR to follow walls turning right. The sampling time was set to 300 ms. The parameters of the PID controller were tuned using a trial-and-error method. The Mean Absolute Errors (MAE) was selected as the cost function. The WFR conducted twelve trial runs along a trial track with a length of 200 cm, consisting of one right turn and one left turn. The parameters that yielded the lowest MAE of 0.90  cm were used for further tests. Subsequently, a closed track for testing was constructed with a length of 845 cm, consisting of 7 right turns and 2 left turns. The WFR completed five test runs successfully, each elapsing the test track twice. The lowest MAE during the tests was 1.06  cm. The favorable performance of the proposed WFR strengthens future development efforts to equip the robot with more hardware to fulfill specific tasks and to put the completion time into optimization consideration.
Prototype of Portable Heart Monitoring System using BITalino SITOMPUL, ERWIN; SUHARTOMO, ANTONIUS; DARMAWAN, FARHAN; SYAFEI, NENDI SUHENDI; TURNIP, ARJON
ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika Vol 11, No 1: Published January 2023
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/elkomika.v11i1.31

Abstract

ABSTRAKJantung adalah organ vital yang menuntut perhatian khusus, terutama untuk orang dengan resiko serangan jantung. Bagi orang kategori ini, diperlukan detektor detak jantung yang bekerja secara kontinu dan real-time yang dapat mendeteksi adanya gangguan jantung secara dini. Pada penelitian ini, penulis mengajukan prototipe sistem monitoring jantung portable (PSMJP) dengan menggunakan modul bio-signal BITalino. Hasil pengukuran diproses pada perangkat komputer yang terhubung dengan BITalino melalui transmisi Bluetooth. Suatu program pemroses sinyal dirancang dengan menggunakan Algorithma Hamilton. Tingkat keberhasilan deteksi pada pengujian terhadap sampel EKG mentah dan pengukuran EKG mentah adalah 100%. PSMJP diujikan kepada 15 naracoba untuk kondisi duduk dan kondisi berjalan. PSMJP berfungsi baik pada 29 dari 30 pengukuran, dimana sinyal elektrik dari jantung terbukti dapat diproses dan memberikan hasil akhir berupa fitur-fitur gelombang detak jantung dan laju detak jantung.Kata kunci: denyut jantung, algoritma Hamilton, BITalino, EKG ABSTRACTThe heart is a vital organ that requires special attention, especially for people with heart attack risk. For people of this category, a heart rate detector that works continuously and in real-time is needed so that heart problems can be detected. In this study, the authors proposed a prototype of a portable heart monitoring system (PPHMS) using the BITalino bio-signal module. The measurement results are processed on a computer device connected to BITalino via Bluetooth transmission. A signal processing program was designed using Hamilton Algorithm. The detection success rate on testing for a raw ECG sample and raw ECG measurement was 100 %. PPHMS was tested on 15 subjects for sitting conditions and walking conditions. PPHMS works well in 29 of the 30 measurements, where electrical signals from the heart are proven to be successfully processed. The final results in the form of heart wave features and heart rate can be provided.Keywords: heart rate, Hamilton Algorithm, BITalino, ECG
Automatic Door Lock with Hand Cleaning and Infra-Red Temperature Detection System GALINA, MIA; PRASETYO, GHALIB EKO; SITOMPUL, ERWIN; SUHARTOMO, ANTONIUS
ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika Vol 10, No 2: Published April 2022
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/elkomika.v10i2.364

Abstract

ABSTRAKKotak pembersih tangan otomatis merupakan perangkat yang dapat membantu proses pembersihan tangan lebih efisien dibandingkan dengan cuci tangan konvensional. Situasi pandemi Covid 19 membutuhkan perangkat yang dapat bekerja non-kontak untuk mengurangi penyebaran virus. Penelitian ini bertujuan mengembangkan sebuah kotak pembersih tangan otomatis yang dapat membaca suhu tubuh menggunakan sensor temperature MLX90614 dikombinasikan dengan kunci pintu solenoid, untuk menjaga seseorang yang ingin memasuki ruangan tertentu harus membersihkan tangan dan memiliki suhu di bawah batas. Saat memasuki ruangan, pengukuran suhu tubuh dilakukan dengan meletakkan tangan pengunjung di sisi kiri dan kanan kotak hand sanitizer otomatis yang dilengkapi sensor MLX90614. Sistem ini bekerja secara akurat dan dapat membaca suhu tubuh secara optimal dari 1 cm - 3 cm, dengan perbedaan dengan pengukuran thermometer guns hanya berkisar -0,27%~-1,92%. Selanjutnya sistem ADHC mampu meningkatkan efisiensi waktu sebesar 83,15% jika dibandingkan dengan metode konvensional. Kata kunci: pembersih tangan otomatis, pengecek suhu tubuh, Bluetooth, RFID ABSTRACTAn automatic hand cleaning box is a device that can help the hand cleaning process be more efficient than conventional hand washing. The Covid 19 pandemic situation requires a device with a contactless system to reduce the spread of the virus. This research aims to develop an automatic hand sanitizer box that can read body temperature using MLX90614 temperature sensor combined with a solenoid door lock to keep someone who enters the room clean their hands and have a temperature below the limit. When entering the room, body temperature measurement is done by placing the visitor's hand on the left and right sides of the automatic hand sanitizer box, equipped with sensor MLX90614. This system works accurately and can read body temperature optimally from 1 cm - 3 cm, with the difference between the thermometer guns only ranging from -0.27%~-1.92%. Furthermore, the ADHC system is able to increase time efficiency by 83,15% if compared with the conventional method.Keyword: automatic hand cleaning, body temperature check, Bluetooth, RFID.
Design and Construction of Batik Drawing Machine with an Arduino-based CNC System Sitompul, Erwin; Ardanta Yoga, Raden Hilary; Galina, Mia
PROtek : Jurnal Ilmiah Teknik Elektro Vol 11, No 2 (2024): Protek : Jurnal Ilmiah Teknik Elektro
Publisher : Program Studi Teknik Elektro Universitas Khairun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33387/protk.v11i2.6057

Abstract

Technology continues to develop, especially in the world of manufacturing. Processes done manually by humans are replaced gradually by machines through automation. This paper proposes a batik drawing machine with Arduino-based computer numerical control (CNC). The intention is to reduce the production of small-sized batik products by eliminating the sketching process of the batik design on the fabric. Besides, the expertise in using canting, a pen-like tool, to apply the liquid wax on the fabric will not be required. A prototype of a batik drawing machine was designed and constructed using main components such as Arduino Mega 2560, NEMA17 HS4401 stepper motor, and RAMPS 1.4 controller board. The batik design data is to be prepared by using a graphic editor, computer-aided design (CAD), and computer-aided manufacturing (CAM) software. After several trials, the best setting for the canting temperature was found to be 112 °C with a drawing speed of 25 steps/mm and a 3 mm distance between the cloth and the tip of the canting. Three batik designs with different difficulty levels were tested for fabric printing. The fabrics were colored to obtain the final results. The batik products with a diameter of up to 450 mm can be finished satisfactorily
Integration of Pixy2 Camera Sensor and Coordinate Transformation for Automatic Color-Based Implementation of a Pick-and-Place Arm Robot Sitompul, Erwin; Yaqin, Muhammad Teguh Ilham; Tarigan, Hendra Jaya; Tampubolon, George Michael; Samsuri, Faisal; Galina, Mia
Jurnal Ilmiah Teknik Elektro Komputer dan Informatika Vol. 11 No. 1 (2025): March
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26555/jiteki.v11i1.30717

Abstract

Technology related to robotics has developed rapidly in recent years. In manufacturing production lines, an industrial pick-and-place robot is used to efficiently move objects from one location to another. In most approaches, this robot automates the repetitive task from one exact start position. However, the task of collecting objects from various positions in the robot workspace still introduces challenges in terms of object positional detection and movement accuracy. In this paper, an arm robot system equipped with automatic color-based object recognition and position control was proposed. The robot was able to detect multiple target object positions automatically without any need to plan a fixed movement beforehand. In the construction of the experiment platform, a Pixy2 camera sensor with color recognition ability was integrated into a 4-DoF Dobot Magician arm robot. Furthermore, a coordinate transformation was derived and implemented to achieve an accurate positional robot movement. The coordinate transformation performed a mapping from the Camera Coordinate System (CCS), which was initialized from image pixel values to the Robot Coordinate System (RCS), which was finalized to the robot’s actuator input signals. Prior to the implementation, the robot underwent a color calibration and position calibration. Thereafter, a set of color signatures was obtained and any object position in the camera’s field of view can be matched with any end-effector position in the robot’s workspace. Three experiment setups were conducted to evaluate the proposed system. Limited to one lighting condition, the robot was commanded to pick-and-place objects based on the criteria of all 3 colors, 1 specific color, and 2 specific colors. The robot performed perfectly to pick and place the objects, achieving a 100% success rate in terms of object color detection and pick-and-place. The positive results encouraged further investigation in different actuator actions and greater work areas.
Implementation of Digital Feedback Control with Change Rate Limiter in Regulating Water Flow Rate Using Arduino Sitompul, Erwin; Putra, Ridha Muhlita; Tarigan, Hendra; Silitonga, Arthur; Bukhori, Iksan
Buletin Ilmiah Sarjana Teknik Elektro Vol. 6 No. 1 (2024): March
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/biste.v6i1.10234

Abstract

Water flow rate control is crucial in applications where it determines operational efficiency in applications such as agriculture, hydroponics, industrial processes, and hydrology. This research presents two algorithms for a simple and reliable digital water flow control: Error-Sign-based Control (ESC) and Error-Value-based Control (EVC). These algorithms are equipped with a change rate limiter to avoid excessive control output increase. They were compared qualitatively with the conventional digital PID controller. Subsequently, they were implemented and tested in a water circulation system. The control loop consisted of a microcontroller, water flow rate sensor, and submersible DC water pump with a supporting motor driver. The controllers were given a control task to follow a 150-second reference trajectory with a changing set point every 30 seconds. The performance measures of Mean Absolute Error (MAE) and Root Mean Square Error (RMSE) were utilized to assess the performance of the control algorithms. EVC with a change rate limiter of 10% delivered the best performance with an MAE of 0.40 and RMSE of 0.97. EVC provides simple and reliable control of the water flow rate system due to its easy tuning, quick tracking response to set point changes, and solid regulating performance. Further work in the implementation of the control scheme in other applications is encouraged.
Co-Authors Ade Mutaqin Angga Febian Antonia Karima Yanti Antonius Suhartomo Antonius Suhartono Ardanta Yoga, Raden Hilary Arjon Turnip Arwinanto Sitohang Bukhori, Iksan Darmawan, Farhan Dea Rizki Febrianti Tawakal Dicky Kuswira Hendra J. Tarigan Ignatius Visnu Indra Eka Prayoga Jaya Tarigan, Hendra Leonhart Setiawan, Vincent Mohammad Adrian Faisal Muhammad Junedi Nendi Suhendi Syafei Prabowo, Andri Setia PRASETYO, GHALIB EKO Putra, Ridha Muhlita Rohmat, Agus Rohmawan, Elan Samsuri, Faisal Silitonga, Arthur sodri sodri Syirli, Khoerrudin Tampubolon, George Michael Tarigan, Hendra Tarigan, Hendra Jaya Trias Wulandari Yaqin, Muhammad Teguh Ilham