Jurnal Teknologi Riset Terapan

Jurnal Teknologi Riset Terapan (JATRA) is a peer-reviewed journal publishing original and quality research article in the fields of applied research technology. JATRA is expected to connect the gap between theories and practice in science and technology to be applied in daily life.

Current Issue

Jurnal Teknologi Riset Terapan (JATRA) is a peer-reviewed journal publishing original and quality research article in the fields of applied research technology. JATRA is expected to connect the gap between theories and practice in science and technology to be applied in daily life.

Published
2023-07-12

Articles

Sistem Kontrol Telemetri Banjir di Kelurahan Belian Batam

Purpose: The design of this flood telemetry control system aims to determine the water level in the drainage and provide warnings of potential flooding to the public with direct notifications to applications running on Android smartphones and to reduce the impact of flooding, a flood detection system tool was built using sensors that connected to a microcontroller that will detect the water level. Methodology: The design of this tool uses 3 (three) sources of information that are installed separately far apart, namely locations A, B, and C connected via the internet network and provide information in the form of monitoring, direct warnings to applications installed on Android Smart Phones. Result: The results of testing this tool work well. And can find out the water level when the rainy season arrives in the environment around the residence from a distance. This tool provides notifications with a delay of about ± 1000ms or 1 second at the smartphone internet access speed to the teleduino webserver or vice versa ± 142ms.

Analisis Rancangan Antena Telemetri Jenis Dipole pada Unmanned Aerial Vehicle (UAV)

Purpose: This study focuses on the design and evaluation of dipole antennas for Unmanned Aerial Vehicles (UAVs) operating at a frequency of 433 MHz. The aim is to develop small and lightweight antennas that do not compromise the aerodynamic characteristics of UAVs, ensuring effective communication between the UAV and the Ground Control Station (GCS). Methodology: The research employed CST software to design and simulate dipole antennas using various materials, including copper, gold, silver, aluminum, and iron. The simulation parameters were analyzed in terms of Voltage Standing Wave Ratio (VSWR) values and return loss. Results: The simulation results revealed that the silver antenna material exhibited the best performance, with a VSWR value of 1.3191 and a return loss of -17.222 dB. However, during the fabrication stage, copper was chosen for the antennas, which yielded a VSWR measurement result of 1.427 and a return loss value of -15.09 dB. Subsequent testing of the dipole antenna's communication distance, when placed on a UAV, resulted in a Received Signal Strength Indicator (RSSI) value of -70.68 dBm. This indicated that the antenna maintained a signal quality of 96% at a distance of 2.5 km. Limitation: One limitation of this study is that it primarily focuses on simulations and testing at a specific frequency (433 MHz) and material selection (copper for fabrication). The results may not be directly applicable to different frequencies or materials used in UAV antennas. Additionally, real-world conditions, such as environmental interference, could affect the performance of the antennas. Contribution:This research contributes to the development of efficient and lightweight dipole antennas for UAVs, ensuring reliable communication with GCS. The findings, particularly the choice of copper for fabrication, provide valuable insights for improving UAV communication systems without compromising flight performance.

Analisa Campuran CPHMA terhadap Penambahan Variasi Aspal Penetrasi 60/70 pada Karakteristik Marshall

Purpose: Highways are one of the main infrastructures in the country's development. On remote and outermost islands there are access barriers to asphalt pavement units (amps). The application of CPHMA (Cold Paving Hot Mix Asbuton) technology is one of the main options to overcome this problem. CPHMA is a cold stretch asphalt mixture that can be used as a surface layer or road grader. The use of CPHMA Asphalt itself also has several problems, such as being brittle and easily dispersed. CPHMA Asphalt Testing is carried out by taking specimens using the Marshall method. It aims to analyze the effect of adding 60/70 penetrating bitumen to the CPHMA mixture on Marshall Characteristics. Methodology: The test was carried out using the SNI standard used while the Marshall Characteristics requirements used the 2018 Road Construction Specification. The addition of 60/70 penetration bitumen levels varied from 0.5%, 1.0%, 1.5%, 2.0% and 25%. From the test results, the stability value increased when the asphalt content was increased from 0.5% to 2.0% and decreased when the asphalt content was increased to 2.5%. At the addition of asphalt content of 0.5% - 2.0% the flow rate meets the requirements, while at the addition of 2.5% asphalt content the flow rate is 6.67% and does not meet the requirements of the Bina Marga specifications. Result: The test results for other Marshal characteristics namely MQ, VFB, VIM, and VMA meet the specifications used. At the addition of asphalt content of 0.5% - 2.5%, the values of MQ, VFB, and VMA increased along with the increase in the addition of asphalt content. On the other hand, the VIM value decreased with increasing asphalt content. From the test results, it is known that the optimum penetration value of asphalt 60/70 is 1.25%.

Perancangan Antena Helix Frekuensi 433 MHz Pita Lebar

Purpose: This research focuses on the design and analysis of a helix antenna operating at 433 MHz with a 4 MHz bandwidth. This study aims to investigate the antenna's performance and functionality with a focus on reception capabilities. Methodology: The initial design of the helix antenna was simulated. Subsequently, the fabricated antenna was tested using a 6000 A vector network analyzer. Various antenna parameters were evaluated, including the return loss (-19.8866 dB), Voltage Standing Wave Ratio (VSWR) (1.22547), and impedance (46.5695 Ohms). The radiation pattern of the helix antenna was directional, with a simulated gain of 9.231 dB. A 1000 mW radio telemetry module served as the signal source during testing. Results: The research findings demonstrate that the helix antenna, designed to operate at 433 MHz, functions as a receiver. The test results revealed a maximum transmission distance of 2.6 kilaometers, with signal strength measurements presented as Received Signal Strength Indicator (RSSI) values (%). However, it is important to note that the data obtained during the testing were suboptimal. This suboptimal performance can be attributed to less-than-ideal outdoor line-of-sight conditions owing to various obstacles affecting signal reception. Limitations: One limitation of this study is that the outdoor line-of-sight conditions during testing were not optimal, which impacted the signal strength received by the antenna. Additionally, the study primarily focused on reception capabilities, and further research may be needed to explore other aspects of the helix antenna's performance. Contribution: This study contributes to the understanding of the functionality of a helix antenna operating at 433 MHz as a receiver. Despite suboptimal testing conditions, this study confirms the antenna's usability for reception purposes and provides valuable insights into its performance characteristics.