Jurnal Jaringan Telekomunikasi (JJT)
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Prediction of signal attenuation value caused by weather changes on cellular communication networks using backpropagation algorithm
Get PDFThe value of signal attenuation by the resulting weather changes may differ at any time. The collection of signal power data with different times, weather, humidity, rainfall, and temperatures using the drive test method in Malang area will be processed using machine learning methods and backpropagation algorithms. The process is carried out using Matlab software. In this study, data collection is carried out on four BTS ranges. In addition to these data, it is also necessary to calculate the value of signal attenuation by weather changes in order to find out whether the weather category is good or bad for telecommunications activities. When the weather is sunny and cloudy it has an RSSI range value of -85 dBm to -75 dBm, while in cloudy and rainy weather it has an RSSI range of -104,2 dBm to -87 dBm. Data from the results of the drive test measurements obtained the signal attenuation value by the largest weather change of 40.49718 dB and the largest rainfall of 681.8 mm / hour. Based on the test data, the signal attenuation value when the weather is sunny and cloudy is worth 0.096164 dB to 8.61604 dB, and in cloudy and rainy weather it has a greater attenuation value, from 12.3466 dB to 21.0098 dB. Using the backpropagation algorithm, the accuracy rate in this prediction reaches 99.7 %
PID Control Schematic Design for Omni-directional wheel mobile robot Cilacap State of Polytechnic
Get PDFOmni-directional mobile robot (OMR) is a robot that can move in all directions with an additional wheel around the core wheel. This research presents a PID controller method at the OMR plant with the specific purpose of getting to the specified point. OMR uses three wheels with an angle difference of 120 degrees. The application of this method using MATLAB assistance from knowing the kinematics to the performance results from the application of the control method. The stages of this research are robot design, component selection, electrical design of the robot, determination of forward kinematic and reverse kinematic and determination of PID controller for positioning. Testing is done by determining the position and determining the point to be determined. Simulation time testing is when the state is at 3,6,9,12 and 15 seconds. The results of the simulation robot can follow the specified coordinates
Design and Optimization of Solar Panel Based on Sun Detector
Get PDFMany factors cause people to be reluctant to apply solar panel technology as a source of renewable electrical energy, one of which is the efficiency level of solar panels which is still very low because the position of solar panels is generally facing in one direction. In this study, we designed a tool that can automatically drive the solar panel motor according to the comparison value obtained from the LDR sensor. There are four LDR sensors for comparison that are used as a reference tool to move towards the brightest light intensity. From this solar panel, the power will be stored in the battery which at the same time drives the motor so that the rays obtained are more optimal and faster for charging the battery. From the results of the research conducted, the energy efficiency in a day is 9 percent from normal conditions without using optimization. It is hoped that this tool can help the community to use alternative renewable energy sources that are more effective and efficient
Design and Build a Coconut Ripeness Classifier Using Sound Sensor
Get PDFThe difference in the texture of coconut flesh is an obstacle for sellers of coconut drinks who use young coconut meat with a soft texture, and an obstacle for industries that use old coconut meat with a hard texture, such as the production of coconut milk, coconut oil and coconut flour. Therefore, consistency in determining the thickness of the coconut flesh is very much needed.This research will design a tool to classification and classify the maturity of sound sensor coconut fruit. In determining young or old coconuts based on sound,a servo motor as a driving force to use the outside of the coconut to make sound.This test is done by testing the original type of green coconut. Based on the results of testing the coconut fruit maturity classification tool using a sound sensor, it can be done and the sound sensor successfully captures sound. Coconut fruit can be classified as young if it has a sound intensity of less than 56 dB, because the coconut fruit has the characteristics of a young coconut, which is small in size, bright green in color and has pink fibers. Meanwhile, if the resulting sound intensity is more than 56 dB, the coconut is classified as an old coconut because the coconut has the characteristics of an old coconut, which is brown or dark green in color, large in size and has white fibers. Speed and power Servo Motor has to be the same input voltage of 5Volt
Design and Implementation of 2x4 Element Hexagonal Array Microstrip Antenna with DGS Method in the Shape of Dumbbell Circle Head for 2.4 GHz Frequency Wi-Fi Applications
Get PDFThis study discusses the design and manufacture of microstrip antennas that aim to widen the bandwidth in the application of Wi-Fi in the form of a hexagonal patch composed of a 2x4 element array. Microstrip antennas have a weakness, namely narrow bandwidth, therefore a modification is needed using the DGS (Defected Ground Structure) method in the form of a dumbbell circle head. The allocation of the Wi-Fi working frequency that is often used in the community is 2.4 GHz in accordance with the IEEE 802.11 protocol standard. This study discusses the result and the effect of the performance of an 2x4-element microstrip array antenna using DGS. This DGS is placed on the ground plane and uses a PCB with an epoxy fiberglass substrate material which has a dielectric constant of 4.58. The result of this research is an external device, namely a microstrip antenna that can increase data transfer capacity and work on a Wi-Fi frequency of 2.4 GHz. This research is in accordance with the antenna test parameters, which have a return loss value of -22.7 dB and VSWR 1.15. 1. The results of testing the bandwidth of the hexagonal 2x4 element microstrip patch antenna with a defected ground structure of 34 MHz. The radiation pattern of the hexagonal 2x4 element microstrip patch antenna using DGS is directional. The results of the power level implementation of a hexagonal microstrip patch antenna arranged in a 2x4 array using a DGS dBm can increase power level by 7 dBm
Canny and Morphological Approaches to Calculating Area and Perimeter of Two-Dimensional Geometry
Get PDFCalculating area and perimeter in real-world conditions has its challenges. The actual conditions include applications in the medical field to measure the presence of tumors or the condition of human organs and applications in geography to measure specific areas on a map; applications in architecture often calculate the area and perimeter of buildings, interior design, exterior design, and other uses. Technology can make it easier with automatic calculations. Mathematical methods and computer vision techniques are required to create automated systems. The Canny method is usually used, which is good enough for detecting edges but not sufficient for measuring irregular geometric shapes. This paper aims to calculate the area and perimeter of a geometric shape using the Canny method and geometry. Data samples in various forms are used in this study. Calculating area and perimeter using the Canny method involves obtaining the length (X,Y) of the RGB image converted to HSV. Edge detection values are used to calculate the area and perimeter of objects. The morphological method uses binary image input as input data. Then proceed to the convolution process with structuring and calculating the area and circumference of objects. Based on the research results, calculating the area and circumference of objects is more effective using morphological methods. However, the level of accuracy is affected by the selection of structuring elements (strels) which must be optimal and global
Comparasion Analysis of Video Quality on Codec VP8 and H.265 PBX Server with Pixel Conversion Method
Get PDFMany studies and research are continuously being developed to improve the quality and capability of video compression. Compression of the video is done with the help of a video codec, in the video there are several types of video codecs including VP8 and H.265. These two codec models have very high resolutions for video. In implementing video calls, the determination of the codec has not been able to prove the results of video quality. To be able to know the quality of the resulting video, codec quality testing can be done through pixel conversion which can later be analyzed for video quality when making calls. In this study, a comparison of the performance of the VP8 and H.265 codecs will be carried out using the FreePBX server as a Raspberry Pi-based Video Call Server and is expected to find out which codecs are appropriate to use for the video call process. Based on the results of the comparison study between the two codecs, it shows that the value of the QoS parameter includes packet loss codec H.265 with a resolution of 720 lower with a value of 0.95%. The throughput value of the VP8 codec with 720p resolution is higher with a value of 1275.36 Kbps. The delay value in the H.265 codec with VGA resolution lower with a value of 6.78 ms. The results of the pixel conversion test show that the H265 codec has a higher PSNR value of 55.64 dB and a lower MSE value of 5.66
Mobile Payment for “PO Tentrem” Bus Rates Based on E-Wallet
Get PDFAccording to the results of a 2022 survey conducted by the Association of Indonesian Internet Service Providers (APJII), internet users in Indonesia continued to increase from 175 million to 220 million users of the total population of Indonesia. The increase was driven by the need for communication during the Covid-19 pandemic in the last two years. Most internet users are on the island of Java, followed by the islands of Sumatra, Kalimantan, Sulawesi, Bali-Nusa, and Maluku-Papua. PT. Tentrem Sejahtera is one of the Inter-City In-Province bus companies based on the island of Java, precisely in East Java. The ordering and payment process is still done manually or offline. Consumers who want to buy tickets must come directly to the terminal, to an authorized agent who has been appointed or do it directly when boarding the bus and make transactions in cash. Where when making manual or cash payments sometimes you have to wait a few minutes to issue money and wait for the ticket given by the conductor, while the level of security in payments is very less, so it is less efficient in this sophisticated era. In addition, there are still unscrupulous brokers at several bus departures who sell tickets that do not match the specified price. This study used the e-wallet electronic payment model method, with a mobile payment system for QRIS-based bus fares. With the National Mercant ID (NMID) listed on the QRIS display, a receipt will be issued on the Thermal Print for proof of payment
A Design and Development of Wireless-Based Electric Load Control Monitoring System on Autobuses Vehicles
No full textThe electrical installation structure on autobuses is generally still based on the old concept that relies on the fuse, where the fuse is the only safety as well as an indicator of the presence or absence of electrical power supply to several electrical devices contained in the autobus. For conditions where there is a short circuit on the line to the electrical load, the electrical equipment on the autobus cannot be operated again. With the problem in the electrical system on the autobus, a monitoring system for controlling the power used on the autobus vehicle was created automatically based on wireless. In this study, the system created using Arduino Uno is functioned as a server node. Then there is a sensor node which will later function to receive incoming data from the Ina219 sensor, then sent using wireless communication to the server node. Then on the server node, all data will be monitored via the LCD display and notification LED, then if there is excessive use the system will turn off the relay where the point is using excess power. From the test results, the sensor node is able to send data from the sensor node readings. Then it is sent to the Node Server and the results obtained are 2% for packet loss. The delay value is 0.29s for the highest result
RANCANG BANGUN SISTEM MONITORING TINGGI, BERAT BADAN DAN INDEX MASSA TUBUH (IMT) MENGGUNAKAN NODEMCU ESP8266 BERBASIS ANDROID
No full textGenerally, height and weight measurements are carried out separately as well as to determine the Body Mass Index must be calculated manually using specific formulas that not everyone understands, so it is difficult to know whether the body has reached a normal number or not. This study will provide suggested solutions to support the body to be healthy in measuring devices and android applications, for height measurement using ultrasonic sensors, weight using loadcell sensors and NodeMCU ESP8266 as data processors. The results of measuring height and weight appear on an LCD, the results of Body Mass Index (BMI) and the recommended solutions to meet standard body numbers in calculating BMI appear on the android application. Based on the results of the tests carried out, it is known that designing a measuring instrument with NodeMCU ESP8266 based on Android has been successfully carried out. The measuring instrument by implementing the Ultrasonic Sensor HC-SR04 as a height measurement can perform a success percentage of 96.95% and Loadcell Sensor as a weight measurement can perform the percentage of success is 98.97%, while in measuring Body Mass Index (BMI) can do a success percentage of 90.84%, the measuring instrument can also emit sound in the form of body condition in accordance with the measurement results obtained by the microcontroller with a success percentage of the sound output of 100% but has an average percentage of voice output delay variations of 2.1 seconds.Pengukuran tinggi dan berat badan masih dilakukan secara terpisah begitu juga untuk menentukan Indeks Massa Tubuh harus dihitung secara manual menggunakan rumus tertentu yang tidak semua orang mengerti sehingga sulit untuk mengetahui sudah mencapai angka normal atau tidaknya tubuh.
Penelitian ini akan memberikan solusi yang disarankan untuk mendukung tubuh menjadi sehat berupa alat ukur dan aplikasi android.Untuk pengukuran tinggi badan menggunakan sensor ultrasonic, berat badan menggunakan sensor loadcell danNodeMCU ESP8266 sebagai pengolah data. Hasil ukur tinggi dan berat badan tampil pada satu LCD, hasil Indeks Massa Tubuh (IMT) beserta solusi yang disarankan untuk memenuhi angka normal tubuh dalam perhitungan IMT tampil pada aplikasi android. Selanjutnya pesan suara yang menunjukkan informasi mengenai kondisi tubuh seperti normal, kurang, berlebih atau obesitas akan dikeluarkan melalui speaker.
Berdasarkan hasil pengujian yang dilakukan diketahui bahwa mendesain Alat ukur dengan NodeMCU ESP8266 berbasis Android telah berhasil dilakukan, Alat ukur dengan mengimplementasikan Sensor Ultrasonik HC-SR04 sebagai pengukur tinggi badan dapat melakukan persentase keberhasilan sebesar 96,95% dan Sensor Loadcell sebagai pengukur berat badan dapat melakukan persentase keberhasilan sebesar 98,97%, sedangkan dalam pengukuran Index Massa Tubuh (IMT) dapat melakukan persentase keberhasilan sebesar 90,84%, Alat ukur juga dapat mengeluarkan suara berupa kondisi badan sesuai dengan hasil ukur yang didapat oleh mikrokontroller dengan persentasi keberhasilan pengeluaran suara sebesar 100%. Transmisi data dari alat menuju aplikasi android pada smartphone dapat dilakukan secara wireless menggunakan WiFi memiliki tingkat keberhasilan 100%.