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  Subjects -> ELECTRONICS (Total: 207 journals)
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Elkha : Jurnal Teknik Elektro
Number of Followers: 0  

  This is an Open Access Journal Open Access journal
ISSN (Print) 1858-1463 - ISSN (Online) 2580-6807
Published by Universitas Tanjungpura Homepage  [7 journals]
  • Multi Sensor-Based Obstacle Avoidance Algorithm in Visual Engineering

    • Authors: Abqori Aula
      Pages: 67 - 72
      Abstract: Obstacle avoidance is an essential problem for applications involving multiple wheeled mobile robots. This research proposes a simple obstacle avoidance rule utilizing only one type of sensor, i.e., infrared sensor. In this research, multiple infrared sensors are placed on a mobile robot, arranged 45° radially equidistance. By using a low-cost and easily available infrared sensor, the cost and time consumed to build and repair a wheeled mobile robot are considerably reduced. Avoiding rules, based on simple behavior, such as “turn”, “stop”, “follow”, and “ignore” are developed. By applying these rules, each robot can refer to the motion of other robot or stationary object to avoid collision. Simulation results show that the proposed algorithm performs well, at 66.7% chance of avoiding a moving object and at 93% chance of avoiding a stationary object.
      PubDate: 2022-10-20
      DOI: 10.26418/elkha.v14i2.50036
      Issue No: Vol. 14, No. 2 (2022)
  • Lighting System Design Based on SNI 6197-2011 and Software-Based Design
           DIALux Evo 9.2 (Case Study: Pekanbaru High School of Technology)

    • Authors: Mulya Feri, Chairul Gagarin Irianto
      Pages: 73 - 78
      Abstract: Lighting is one of the important factors in a room design. The intensity of lighting that does not meet the standards can affect eye health and work activities. In this study, measurements of the lighting intensity were carried out at Pekanbaru College of Technology (STTP) i.e., in classroom 01A and library. Lumen method is one of the calculation methods to determine the number of luminaires required to improve the lighting quality in the room. For the lighting in classroom 01A, the mathematical calculations result in 363.23 lux while the DIALux evo 9.2 software obtained 375 lux. There is 3.1% difference in these results This might occur because the condition of the room, supporting equipment, and color has an influence on the results of calculations and the spread of light, while the effect of color is not considered. However, in calculations using DIALux evo 9.2 software, surface color has an influence on the results obtained.by changing the specifications of the lamp using the type of LED lamp. The lighting standard to improve the lighting system refers to SNI 6197:2011.
      PubDate: 2022-10-20
      DOI: 10.26418/elkha.v14i2.50278
      Issue No: Vol. 14, No. 2 (2022)
  • Magnetostriction Generator as Acoustic Wave Generator for Underwater

    • Authors: Rustamaji Rustamaji, Kania Sawitri, Mustafidz Ahdan
      Pages: 79 - 88
      Abstract: At this time the research related to the effect of magnetostriction for underwater applications is still limited. Acoustic or sound waves are more easily propagated underwater than electromagnetic waves or light. An acoustic wave or sound can be generated by utilizing the magnetostriction effect, where this effect occurs when a rod of ferromagnetic material such as iron or nickel is magnetized and interacts with another magnetic field, resulting in vibration of the metal rod. This research aims to design and realize a magnetostriction generator as an acoustic wave generator at a frequency of 1 to 10 kHz for underwater applications, consisting of: a tuned LC oscillator circuit, and a ferromagnetic metal rod which is magnetized using a dc voltage. The results of measurements and testing of the magnetostriction generator show: (1) if it is equipped with a membrane, can work to emit an acoustic wave or sound at a frequency of ± 8.62 kHz in the air up to a distance of 15 cm without distortion with an average amplitude decrease of ± 0.648 dB for each the distance increased by 1 cm, and (2) if equipped with a membrane and enclosed in a waterproof casing, capable of transmitting the acoustic waves at a frequency of ± 8.31 kHz underwater up to a distance of 7 cm without distortion with an average amplitude decrease of ± 4.217 dB for each the distance up 1 cm. Overall the magnetostriction generator designed can work to generate and transmit the acoustic waves or sound underwater, as expected.
      PubDate: 2022-10-20
      DOI: 10.26418/elkha.v14i2.54404
      Issue No: Vol. 14, No. 2 (2022)
  • Modernization of Dense Wavelength Division Multiplexing (DWDM) Route
           Surabaya-Bangil To Increase Optical Network Capacity

    • Authors: Imelda Uli Vistalina Simanjuntak, Solichah Larasati, Yosy Rahmawati S, Dina Amalia Santika
      Pages: 89 - 95
      Abstract: Along with the increasing demand for data networks, on the Java island network traffic, especially the Surabaya - Bangil link, the operator increases the channel capacity by modernizing DWDM (Dense Wavelength Division Multiplexing) technology in its transmission equipment. At that time, the DWDM technology was DWDM 6800 with a maximum capacity of one port that could only accommodate 10 Gbit/s, while using DWDM 9800, the maximum capacity of one port could accommodate up to 100 Gbit/s. Modernization of DWDM 6800 to DWDM 9800 technology uses the cross-connect method so that it does not require many costs and can be done within a short duration of time so that network performance can be adequately maintained. As a result, after modernization, the network has sufficient reserves to cover demand for the next few years.
      PubDate: 2022-10-20
      DOI: 10.26418/elkha.v14i2.56003
      Issue No: Vol. 14, No. 2 (2022)
  • Application of LoRa Technology at Distribution Substation Using Peak Load

    • Authors: Purnama Helena Hutabarat, Mhd Fitra Zambak
      Pages: 96 - 101
      Abstract: The process of monitoring and measuring transformers at PT. PLN (Persero) at the distribution substation BR 391 is done manually during peak load hours in the field, usually between 18.00-22.00 local time. Distribution substations sometimes have different peak load hours, in the morning, afternoon, evening, and sometimes during the day. Taking into account the different peak load hours at different substations, the current peak load hours are still determined by human. It is not effective, to overcome this, in this study it is planned to design a monitor and data storage using LoRa technology to monitor transformers at distribution substations all the time and has been tested at distribution substation BR 391 Jl. Wijaya Kusuma Medan. From the observations, peak load hours occur between 18.00-22.00 WIB and the highest peak load with power per phase: R=20,513,40 watts, S=15,350.06 watts, and T=21,323.91 watts. It can be seen that the highest average daily power consumption is at 20.00 WIB. More load usage occurs at night and the highest load is in the T phase. The increase in load affects the temperature increase of the cable up to 42.6℃
      PubDate: 2022-10-20
      DOI: 10.26418/elkha.v14i2.56053
      Issue No: Vol. 14, No. 2 (2022)
  • Implementation of Wireless Sensor Network (WSN) for Earthquake Detection

    • Authors: Imanuel Sitanggang, Joy A. I. Damanik, Fajar Hutabarat, Albert Sagala
      Pages: 102 - 109
      Abstract: The current earthquake monitoring system uses a seismometer that can capture seismic vibrations very well but is expensive, heavy, and difficult to launch. Therefore, earthquake monitoring stations can only be launched in a few places in small numbers. This study aims to implement a Wireless Sensor Network (WSN) system for earthquake monitoring. The WSN system has advantages in cost, size, and ease of launch, so it is very appropriate to be used for this purpose. An earthquake detection sensor system has been designed in this study using a vibration sensor and a piezoelectric sensor. When an earthquake occurs, the resulting shock will trigger the vibration sensor and activate the sensor node. The shock data is then captured by the piezo sensor and processed by the microcontroller using Fast Fourier Transform (FFT) to determine the frequency value of the shock. The data is then sent to a gateway via a sensor network and uploaded to the Cayenne monitoring website. Operators can then view the data on the website. Three sensor nodes are implemented in this study. The test is done by placing those sensor nodes together in random positions. A shock is then given to the three sensor nodes, and the resulting data is then observed. The results show that the three sensors can detect, retrieve, process, and send shock data to the Cayenne monitoring website.
      PubDate: 2022-10-20
      DOI: 10.26418/elkha.v14i2.56146
      Issue No: Vol. 14, No. 2 (2022)
  • Lockdown Impact due to Corona Pandemic on Electric Power Quality and Its
           Alternative Solutions for a University Office Building

    • Authors: Ida Ayu Vadanti Locana Diwy, Amien Rahardjo, Aji Nur Widyanto, Faiz Husnayain, Rudy Setiabudy
      Pages: 110 - 117
      Abstract: The pandemic has changed the usage pattern of electrical appliances in buildings. This new pattern can create new problems in terms of power quality and thus affect the electrical system’s reliability. The purpose of this study is to determine the power quality of the Dean Office Building, Faculty of Engineering, Universitas Indonesia, and propose alternative solutions to its problems. To determine the quality of electric power, the related parameters such as voltage, current, power factor, and harmonics are measured first. The measurement results are compared with existing standards. If these standards cannot be met, damage to electrical equipment can occur. Out of eight parameters, three did not meet the criteria. First, overvoltage on average voltage with the range of 231.5-232.8 V. Second, IHDi nominal on the 3rd, 5th, 7th, and 15th harmonics for Thursday, April 7, 2022 on 06:11 with the value of 70.3%, 55.34%, 27.1%, and 8.07%. And third, the minimum power factor for the T phase with the value of 0.7219 is still less than 0.85. Possible solutions include checking and changing the supply transformer tap-changer, making an energy monitoring system and wiring diagram for understanding the load profile of the building, and using a single-tuned filter for harmonic currents.
      PubDate: 2022-10-20
      DOI: 10.26418/elkha.v14i2.56226
      Issue No: Vol. 14, No. 2 (2022)
  • Voice Command Recognition for Movement Control of a 4-DoF Robot Arm

    • Authors: Rendyansyah Rendyansyah, Aditya P. P. Prasetyo, Sarmayanta Sembiring
      Pages: 118 - 124
      Abstract: Robots are widely used in industry. Robots generally have a control system or intelligence embedded in the processor. The robots consist of mobile mode, manipulator, and their combination. Mobile robots usually use wheels, and manipulator robots have limited degrees of freedom. Both have their respective advantages. Mobile robots are widely applied to environments with flat floor surfaces. The manipulator robots are applied to a static environment to produce, print, and cut material. In this study, the robot arm 4 Degree of Freedom (DoF) is integrated with a computer. The computer controls the whole system, where the operator can control the Robot based on voice commands. The operator's voice is one person only with different intonations. Voice command recognition uses the Mel-Frequency Cepstral Coefficients (MFCC) and Artificial Neural Networks (ANN) methods. The MFCC and ANN programs are processed in the computer, and the program output is sent to the Robot via serial communication. There are nine types of voice commands with different MFCC patterns. ANN training data for each command is 10 data, so the total becomes 90. In this experiment, the Robot can move according to voice commands given by the operator. Tests for each voice command are ten experiments, so the total experiment is 90 times with a success rate of 94%. There is only one operator, and experiments have not yet been carried out with the voices of several operators. The error occurred because there were several similar patterns during system testing.
      PubDate: 2022-10-20
      DOI: 10.26418/elkha.v14i2.57556
      Issue No: Vol. 14, No. 2 (2022)
  • Multi-Security System Based on RFID Fingerprint and Keypad to Access the

    • Authors: Ramses Wanto Tambunan, Abdul Aziz Ar-Rafif, Mia Galina
      Pages: 125 - 131
      Abstract: It is necessary to prepare for the increasing crime rate of household theft with a modern home security system that allows customers to monitor home security remotely. This can be accomplished by replacing the standard lock with a solenoid door lock, which is more difficult to duplicate and reduces the likelihood of theft when the house is unoccupied. The
      Authors developed a three-tiered home security system prototype that includes fingerprint, the RFID, and keypad biometric sensors. The device's finished prototype was tested ten times after it was designed. The Arduino Uno microcontroller, which also serves as the door-locking mechanism, turns on the door-lock solenoid. When authentication is successful, someone will be granted access to the door. The preliminary findings indicate that the fingerprint. The fingerprint sensor's ability to read fingerprints in 3.7 seconds on average demonstrates its effectiveness. Second, the RFID sensor detects the e-KTP, and the RFID scans the card in an average of 2.4 seconds. The third keypad contains the password for unlocking the door. After ten repetitions, the experiment input yields an average time of 3.66 seconds. Opening a door with a 3-level multi-sensor typically takes 9.8 seconds. In this study, the installation of each sensor is notified via a GSM SIM800L module, allowing customers to monitor security remotely.
      PubDate: 2022-10-20
      DOI: 10.26418/elkha.v14i2.57735
      Issue No: Vol. 14, No. 2 (2022)
  • Portable Pico-hydro Power Plant with Archimedes Screw Turbine in Pelangi
           Reservoir of Universitas Islam Indonesia

    • Authors: iftitah imawati, Millen Febiansyah, Enaya Kafka Garuda Novtrianda, Husein Mubarok
      Pages: 132 - 138
      Abstract: Indonesia has a lot of potential to build hydroelectric power plants because of its size and abundance of water. As in the Islamic University of Indonesia, there is a Pelangi Reservoir which has the potential to develop a pico-hydro power plant. A portable pico hydro system is needed to generate electricity properly. In this study, the pico hydro generator system was designed starting from the turbine, pulley, generator, controller, battery to the load. In the process, the voltage and current generated by this portable pico hydro generator system will be observed. By using a screw turbine, the team designed the system to optimally utilize Pelangi Reservoir water flow. The DC generator was chosen as a converter of kinetic energy into electrical energy because with low rotation, and a stable DC generator produces direct electricity. Several changes from design to reality were made so that the system could work according to field conditions and not damage the ecosystem around Pelangi reservoir. According to the test results, the current pico-hydro system at Pelangi Reservoir UII can generate a maximum power of 8.544 watts and an average discharge of 7.1532 L/second. The power can increase if the water flow has a larger discharge. If the large discharge flow is balanced by the robustness of the turbine and system. At low conditions, the system can charge a battery with a capacity of 12 volts 4 Ah with a water flow rate of 4.807 L/second, which is 9.9 volts to 12.2 volts in 36 minutes. The efficiency of hydroelectric power generation (Pico-hydro) then increases to 16.71%. The system can generate 86.49 watts of electricity at 1500 rpm on the generator.
      PubDate: 2022-10-20
      DOI: 10.26418/elkha.v14i2.57770
      Issue No: Vol. 14, No. 2 (2022)
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