ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika最新文献

{"title":"Konsep Transmisi Tidak Koheren menggunakan Differential Unitary Modulation pada OFDMA","authors":"D. Setiawan, Harfan Hian Ryanu, Vinsensius Sigit Widhi Prabowo","doi":"10.26760/ELKOMIKA.V9I3.634","DOIUrl":"https://doi.org/10.26760/ELKOMIKA.V9I3.634","url":null,"abstract":"ABSTRAKDifferential modulation adalah sebuah teknik modulasi yang memungkinkan pengiriman informasi tanpa diperlukannya estimasi kondisi kanal di sisi penerima. Teknik ini biasa diimplementasikan pada kondisi dimana kanal transmisi berubah dengan sangat cepat, seperti ketika pengguna layanan dalam kondisi mobilitas yang sangat cepat. Pada artikel ini, beberapa teknik differential modulation yang dikembangkan dari Space Time Block Code (STBC) diujicobakan pada Orthogonal Frequency Division Multiple Access (OFDMA) dengan dua skema yang berbeda. Skema pertama menggunakan konsep sistem antena multiple-input multipleoutput (MIMO), dan skema kedua adalah skema single-input single-output (SISO). Hasil pengujian yang diperoleh, teknik differential modulation dengan skema yang ditawarkan pada artikel ini mampu memberikan kinerja yang lebih baik daripada teknik differential modulation yang konvensional. Hasil riset menunjukkan konsep transmisi tidak koheren dapat menjadi solusi potensial untuk sistem komunikasi nirkabel berkecepatan tinggi.Kata kunci: transmisi tidak koheren, differential modulation, mobilitas tinggi, OFDMA, STBC ABSTRACTDifferential modulation is a modulation technique that can be used without the presence of channel estimation in the receiver. This technique is usually implemented when the channel condition changes rapidly, for example, when the user is in a high mobility condition. In this paper, several differential modulation techniques, which are modified from space-time block code (STBC) are tested for Orthogonal Frequency Division Multiple Access (OFDMA) using two different schemes. The first scheme uses multiple-input multiple-output (MIMO) antenna system, while the second scheme use single-input single-output (SISO). Based on our results, the differential modulation techniques proposed in this paper can overcome the conventional differential modulation technique. This research shows the proposed non-coherent transmission could be a potential scheme for high mobility wireless communications.Keywords: non-coherent transmission, differential modulation, high mobility, OFDMA, STBC.","PeriodicalId":344430,"journal":{"name":"ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika","volume":"77 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134620413","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Perencanaan LTE-A untuk Heterogeneous Network dengan Metode CADS4 di Grand Asia Afrika","authors":"Yogi Ariyanto, Hasanah Putri, Atik Novianti","doi":"10.26760/ELKOMIKA.V9I3.663","DOIUrl":"https://doi.org/10.26760/ELKOMIKA.V9I3.663","url":null,"abstract":"ABSTRAKBerdasarkan hasil pengukuran di Grand Asia Afrika (GAA) diketahui terdapat peningkatan kualitas jaringan setelah pemasangan unit COMBAT selama 7 hari. RSRP ≥ -95 dBm sebelumnya sebesar 75,70% menjadi 100%, SINR ≥ 0 dB dari 53,58% menjadi 97,54%, dan throughput ≥ 8 Mbps sebelumnya sebesar 48,12% menjadi 89,55%. Untuk mempertahankan kualitas tersebut maka dibangunlah small cell. Perencanaan menerapkan metode inter-band carrier aggregation pada heterogen network LTE dengan skema CADS4 sebagai pengganti unit COMBAT. Tujuan perencanaan ini adalah extended throughput dan agar kualitas layanan pada beban trafik tinggi tetap baik. Macro cell sebagai Primary Cell (PCell) pada band-1 2100 MHz dan micro cell sebagai Secondary Cell (SCell) pada band-3 1800 MHz. Hasil perencanaan menunjukkan telah memenuhi standar RF Parameter LTE yaitu RSRP sebesar -92,65 dBm, SINR sebesar 16,55 dB, throughput sebesar 1,062 Mbps, dan user connected 97%.Kata kunci: LTE-A, heterogen network, CADS4, Great Asia Afrika Bandung ABSTRACTBased on the report on the development of temporary sites in the tourist area of Great Asia Africa (GAA), it shows that the DRR rate is> 90% in the sectors leading to GAA. From the measurement, it is known that there is an increase in network quality after installing the COMBAT unit for 7 days. For RSRP ≥ -95 dBm, the previous amount was 75.70% to 100.00%, for SINR ≥ 0 dB previously it was 53.58% to 97.54%, and for throughput ≥ 8 Mbps the previous was 48.12% to 89,55%. To maintain the quality of the network, small cells were built to cover the GAA area. Planning to apply the inter-band carrier aggregation method to the heterogeneous LTE network with the CADS4 scheme to replace the COMBAT unit. The purpose of planning is to provide extended throughput and so that the service quality at high traffic loads remains good. The configuration used is a macro cell as a Primary Cell (PCell) in the band-1 2100 MHz and a micro cell as a Secondry Cell (SCell) in the 1800 MHz band-3. The results of the planning meet the LTE parameter RF standards, RSRP of -92.65 dBm, SINR of 16.55 dB, throughput of 1.062 Mbps, and users connected to 97%.Keywords: LTE-A, heterogen network, CADS4, Great Asia Afrika Bandung","PeriodicalId":344430,"journal":{"name":"ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122359170","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Evaluasi Kinerja GSM VoIP Gateway pada Sistem IP PBX","authors":"Heri Andrianto, Daniel Setiadikarunia, Hendry Raharjo","doi":"10.26760/ELKOMIKA.V9I3.731","DOIUrl":"https://doi.org/10.26760/ELKOMIKA.V9I3.731","url":null,"abstract":"ABSTRAKGSM VoIP Gateway digunakan untuk menghubungkan jaringan VoIP dengan jaringan GSM sehingga memungkinkan VoIP client melakukan komunikasi dengan VoIP client lain melalui jaringan GSM sehingga biaya komunikasi dapat ditekan. Pada penelitian ini, telah dirancang dan direalisasikan sistem IP PBX yang dihubungkan ke jaringan GSM menggunakan GSM VoIP Gateway. Evaluasi kinerja GSM VoIP Gateway pada sistem IP PBX dilakukan dengan mengamati nilai parameter Quality of Service (QoS). Komunikasi antara VoIP client dengan GSM VoIP Gateway dikategorikan pada kualitas layanan VoIP yang baik karena memiliki nilai rata-rata jitter ≤ 5,7 ms, packet loss ≤ 0,18% dan delay ≤ 9,41 ms. Komunikasi antara softphone SIPdroid dengan GSM VoIP Gateway memiliki nilai rata-rata jitter 22,58 ms, paket loss 48,68%, dan delay 14,54 ms, hal ini disebabkan karena komunikasi VoIP menggunakan koneksi WiFi. Selain itu perbedaan spesifikasi perangkat keras dan perangkat lunak juga turut mempengaruhi nilai parameter QoS.Kata kunci: GSM VoIP Gateway, IP PBX, VoIP ABSTRACTGSM VoIP Gateway is used to connect the VoIP network to the GSM network, allowing VoIP clients to communicate with other VoIP clients via the GSM network therefore the communication costs can be reduced. In this research, an IP PBX system connected to a GSM network using a GSM VoIP Gateway has been designed and realized. Performance evaluation of the GSM VoIP Gateway on the IP PBX system is carried out by observing the value of the Quality of Service (QoS) parameter. Communication between the VoIP client and GSM VoIP Gateway is categorized as a good quality VoIP service because it has an average value of jitter ≤ 5.7 ms, packet loss ≤ 0.18% and delay ≤ 9.41 ms. Communication between the SIPdroid softphone and the GSM VoIP Gateway has an average jitter value of 22.58 ms, a packet loss of 48.68%, and a delay of 14.54 ms, due to VoIP communication uses a WiFi connection. In addition, differences on hardware and software specifications also affect the value of QoS parameters.Keywords: GSM VoIP Gateway, IP PBX, VoIP","PeriodicalId":344430,"journal":{"name":"ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128581420","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Sistem Pemantauan dan Pendeteksi Kebakaran berbasis Logika Fuzzy dan Real-time Database","authors":"E. Hw, Rohmat Tulloh, Sugondo Hadiyoso, D. Ramadan","doi":"10.26760/ELKOMIKA.V9I3.577","DOIUrl":"https://doi.org/10.26760/ELKOMIKA.V9I3.577","url":null,"abstract":"ABSTRAKKebakaran rumah seringkali disebabkan oleh kelalaian manusia. Oleh karena itu diperlukan sebuah sistem yang dapat mendeteksi kebakaran secara online realtime. Pada studi ini, dirancang dan diimplementasikan sebuah sistem pendeteksi kebakaran dengan sejumlah sensor untuk mengukur beberapa parameter lingkungan. Sistem ini dilengkapi dengan pengambil keputusan menggunakan metode fuzzy logic. Parameter lingkungan yang diukur mencakup suhu ruangan, asap dan api yang kemudian dapat dimonitor secara real-time melalui web interface menggunakan Internet of Things platform. Pengujian menunjukkan bahwa detektor dapat mendeteksi api dengan jarak hingga 100 cm dengan akurasi mencapai 100%. Pengujian sensor suhu menunjukkan akurasi 98.79%, sementara itu detektor asap memperoleh akurasi 77.81%. Sistem ini mampu mengirimkan data dengan rata-rata delay transmisi 0.62 detik. Sistem usulan ini diharapkan dapat menyediakan pemantauan kondisi suatu ruangan secara real-time.Kata kunci: Kebakaran, Real-Time, Deteksi, Fuzzy, Internet Of Things ABSTRACTHouse fires are often caused by human error. Therefore, we need a system that can detect fires online real-time. In this study, a fire detection system with a number of sensors is designed and implemented to measure several environmental parameters. This system is equipped with a decision maker using the fuzzy logic method. The environmental parameters measured include room temperature, smoke and fire which can then be monitored in real time via a web interface using the Internet of Things platform. Tests show that the detector can detect fires with a distance of up to 100 cm with an accuracy of up to 100%. The temperature sensor test shows an accuracy of 98.79%, while the smoke detector generates an accuracy of 77.81%. This system is capable of sending data with an average transmission delay of 0.62 seconds. This proposed system is expected to provide realtime monitoring of the condition of a room.Keywords: Fire, Real-time, detection, Fuzzy, internet of things","PeriodicalId":344430,"journal":{"name":"ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126552433","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Penerima Gelombang ELF berbasis Op-Amp untuk Pengolahan Akuisisi Data Gempa Bumi","authors":"Rheyuniarto Sahlendar Asthan, Dean Corio, M. Ulfah, U. A. Ramadhani, Achmad Munir","doi":"10.26760/ELKOMIKA.V9I3.592","DOIUrl":"https://doi.org/10.26760/ELKOMIKA.V9I3.592","url":null,"abstract":"ABSTRAKPenelitian ini membahas mengenai penerima gelombang extremely low frequency (ELF) untuk pengolahan akuisisi data gempa bumi. Penerima ELF dirancang menggunakan operational amplifier (Op-Amp) dengan masukan takmembalik. Sinyal yang diterima oleh antena diteruskan ke penerima ELF yang terdiri dari preamplifier dan amplifier untuk proses penguatan, serta filter aktif orde 2 untuk menekan sinyal di atas frekuensi cut-off sebesar 50Hz. Karakterisasi penerima ELF dilakukan dengan mengamati perbandingan level tegangan sinyal keluaran terhadap level tegangan sinyal masukan, sensitivitas, serta bentuk sinyal keluaran dari penerima ELF dalam domain waktu. Hasil simulasi menunjukkan bahwa penerima ELF menghasilkan penguatan sebesar 60,8dB dengan sensitifitas tinggi untuk level sinyal masukan di bawah -30dB yang mampu memenuhi level sinyal untuk pengolahan akuisisi data.Kata kunci: extremely low frequency, penerima ELF, operational amplifier, filter aktif, gempa bumi ABSTRACTThis research presents extremely low frequency (ELF) receiver for earthquake data acquisition processing. The ELF receiver is designed based on non-inverting operational amplifier (Op-Amp). The signal received by the antenna is fed into ELF receiver which consists of preamplifier and amplifier for amplification, and second order active filter to suppress unwanted signal above the cut-off frequency of 50Hz. Characterization of ELF receiver is performed by observing the comparison of the level output signal to level input signal, sensitivity, and ELF receiver signal output in time domain. The simulation results show that the ELF receiver has gain of 60.8dB with high sensitivity for low level input signals below -30dB that is able to meet signal level for data acquisition processing.Keywords: extremely low frequency, ELF receiver, operational amplifier, active filter, earthquake","PeriodicalId":344430,"journal":{"name":"ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130022302","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Klasifikasi COVID-19 menggunakan Filter Gabor dan CNN dengan Hyperparameter Tuning","authors":"A. Minarno, Mochammad Hazmi Cokro Mandiri, M. Alfarizy","doi":"10.26760/ELKOMIKA.V9I3.493","DOIUrl":"https://doi.org/10.26760/ELKOMIKA.V9I3.493","url":null,"abstract":"ABSTRAKPenyakit COVID-19 dapat timbul karena berbagai faktor sebab dan akibat, sehingga penyakit ini memiliki efek buruk bagi penderita. Pencitraan CT-Scan memiliki keunggulan dalam memproyeksikan kondisi paru-paru pasien penderita, sehingga dapat membantu dalam mendeteksi tingkat keparahan penyakit. Dalam studi ini, penelitian dilakukan untuk mendeteksi penyakit COVID-19 melalui citra CT-Scan menggunakan metode Filter Gabor dan Convolutional Neural Networks (CNN) dengan Hyperparameter Tuning. Data yang digunakan yaitu citra CT-Scan SARSCoV-2 berjumlah 2481 gambar. Sebelum melatih model, dilakukan preprocessing data, seperti pelabelan, pengubahan ukuran, dan augmentasi gambar. Pengujian Model dilakukan dengan beberapa skenario uji. Hasil terbaik diperoleh pada skenario untuk model Filter Gabor dan CNN dengan Hyperparameter Tuning mendapatkan akurasi sebesar 97,9% dan AUC sebesar 99% dibandingkan dengan model tanpa Hyperparameter Tuning dan Filter Gabor.Kata kunci: COVID-19, CNN, Filter Gabor, Hyperparameter Tuning, COVID-19 Classification ABSTRACTCOVID-19 disease can arise due to various causal and causal factors, so it has an adverse effect on patients. CT-Scan imaging has an advantage in projecting the lung condition of patients with the patient, so it can help in detecting the severity of the disease. In this study, research was conducted to detect COVID-19 disease through CT-Scan imagery using Gabor Filter method and Convolutional Neural Networks (CNN) with Hyperparameter Tuning. The data used is CT-Scan SARSCoV-2 imagery amounting to 2481 images. Before training the model, preprocessing data is performed, such as labeling, resizing, and augmentation of images. Model testing is performed with multiple test scenarios. The best results were obtained in scenarios for The Gabor Filter model and CNN with Hyperparameter Tuning getting 97.9% accuracy and AUC by 99% compared to models without Hyperparameter Tuning and Gabor Filter.Keywords: COVID-19, CNN, Filter Gabor, Hyperparameter Tuning, COVID-19 Classification","PeriodicalId":344430,"journal":{"name":"ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133461625","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Desain dan Simulasi GMP Fluks Aksial Berbasis Dimensi Magnet Permanen Komersil","authors":"Pudji Irasari, Puji Widiyanto, Muhammad Fathul Hikmawan","doi":"10.26760/elkomika.v8i3.602","DOIUrl":"https://doi.org/10.26760/elkomika.v8i3.602","url":null,"abstract":"ABSTRAKMakalah ini membahas desain dan simulasi generator magnet permanen fluks aksial 500 W, 220 V, 500 rpm, 1 fasa, stator tunggal tanpa inti besi lunak dan rotor ganda berbahan baja karbon. Tujuan studi adalah untuk mengetahui performa generator pada dua jenis pembebanan yaitu beban RL dan ZL. Metode perhitungan desain dilakukan secara analitik dan numerik menggunakan perangkat lunak FEMM 4.2 dengan berbasis pada dimensi magnet permanen komersil. Performa generator yang dianalisis meliputi tegangan terminal, daya keluaran dan efisiensi. Hasil simulasi menunjukkan bahwa ketika diberi beban RL, daya keluaran dan efisiensi generator lebih tinggi dibanding ketika diberi beban ZL. Grafik tegangan terminal dari kedua jenis pembebanan tersebut sebagian berimpit tetapi pada beban RL tingkat penurunannya lebih tajam disebabkan tegangan jatuhnya lebih besar. Dari semua hasil perhitungan dan simulasi, dapat disimpulkan bahwa generator menunjukkan performa yang baik pada kedua jenis pembebanan dengan efisiensi sekitar 80%.Kata kunci: generator, magnet permanen, fluks aksial, stator tunggal, rotor ganda ABSTRACTThis paper discusses the design and simulation of 500 W, 220 V, 500 rpm axial flux permanent magnet generators, with the construction of coreless, single stator, and double rotor made of carbon steel. This study aims to find out the performance of the generators in two types of loadings, namely RL and ZL loads. The design calculation method is done analytically and numerically using FEMM 4.2 software based on the dimensions of commercial permanent magnets. The generator performances analyzed include the terminal voltage, the output power, and the efficiency. From the simulation results, it is known that under load RL, the output power and efficiency are higher than under load ZL. The terminal voltage graphs of the two types of loadings partially coincide but at the RL load, the rate of the decline is sharper due to the greater voltage drop. From all the results, it can be concluded that the generator shows good performance on both types of loads with a quite high efficiency, which is around 80%.Keywords: generator, permanent magnet, axial flux, single stator, double rotor","PeriodicalId":344430,"journal":{"name":"ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122279097","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Wireless Sensor Network (WSN) untuk Predictive Maintenance Lampu Sinyal Kereta Api","authors":"Muhammad Fauzi Nuryasin, B. M. Wibawa, Mohammad Taufik","doi":"10.26760/elkomika.v8i2.418","DOIUrl":"https://doi.org/10.26760/elkomika.v8i2.418","url":null,"abstract":"ABSTRAKLampu sinyal memiliki peranan yang penting dalam persinyalan kereta api. Pemeliharaan lampu sinyal perlu diperhatikan agar kondisi lampu sinyal tetap sesuai standar. Penelitian ini merancang Wireless Sensor Network (WSN) untuk mengakuisisi parameter lampu sinyal agar dapat dipantau, dianalisis, dan disimpan. Parameter yang diakuisisi berdasarkan dari standar peraturan Menteri Perhubungan Indonesia mengenai lampu sinyal kereta api antara lain intensitas cahaya, tegangan, suhu, dan kelembapan lingkungan lampu sinyal. Sistem tersusun dari tiga subsistem, yaitu sensor node, gateway, dan server. Sistem dapat melakukan pemantauan intensitas lampu sinyal, suhu dan kelembapan lingkungan lampu sinyal, serta tegangan lampu sinyal yang dikirim secara nirkabel yang dapat mencapai jarak hingga 200 m memanfaatkan spektrum radio frekuensi 433 Mhz. Pada saat ada gangguan terhadap lampu sinyal, sistem telah mampu melakukan predictive maintenance berdasarkan standarisasi lampu sinyal.Kata kunci: lampu sinyal, sensor node, gateway, server, wireless sensor network ABSTRACTSignal lights has an important role in railway signaling. Proper maintenance must be taken to maintain signal lights so that signal lights condition remain in accordance with the standard. This study designed the Wireless Sensor Network (WSN) to acquire signal lights parameter information so that it can be monitored, analyzed and stored. The parameters acquired are based on the Indonesian Minister of Transportation's regulatory standards regarding railway signal lights such as light intensity, voltage, temperature, and humidity of signal lights. System consists of three subsystems, namely sensor node, gateway, and server. System can monitor signal lights intensity, ambient temperature, ambient humidity, and voltage of signal lights then send those parameters which can reach distances of up to 200 m utilizing the radio frequency spectrum 433 Mhz. When there are interferences with signal lights, system has been able to perform predictive maintenance based on the signal lights standardization.Keywords: signal lights, sensor node, gateway, server, wireless sensor network","PeriodicalId":344430,"journal":{"name":"ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika","volume":"209 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116153185","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Desain dan Implementasi Data Logger untuk Pengukuran Daya Keluaran Panel Surya dan Iradiasi Matahari","authors":"Apip Pudin, Ignatius Riyadi Mardiyanto","doi":"10.26760/ELKOMIKA.V8I2.240","DOIUrl":"https://doi.org/10.26760/ELKOMIKA.V8I2.240","url":null,"abstract":"ABSTRAKInformasi mengenai daya keluaran panel surya dan intensitas radiasi matahari diperlukan dalam sistem PLTS guna mengetahui karakteristik potensi daya yang dibangkitkan panel dan estimasi besarnya beban yang terpasang. Dalam penelitian ini, telah dirancang perangkat data logger berbasis Arduino Uno dengan media penyimpan data berupa kartu MicroSD dan format data MS Excel. Parameter daya diperoleh menggunakan modul sensor tegangan dengan prinsip pembagi tegangan dan sensor arus dengan resistor shunt. Intensitas radiasi diperoleh dari sensor Solar Power Meter menggunakan interface kabel RS232 to TTL. Hasil menunjukan nilai rata-rata error tegangan sebesar 36 mV atau inakurasi 0,41% untuk rentang pengukuran dari 0,7 V sampai 24 V, sedangkan rata-rata error arus sebesar 10 mA atau inakurasi 0,42% untuk pengukuran dari 0,3 A sampai 7,5 A. Nilai inakurasi ini masih dibawah nilai rata-rata alat ukur standar yang ada di pasaran sekitar 1%, sehingga hasil rancangan ini bisa digunakan untuk keperluan pengukuran.Kata kunci: tegangan, arus, daya, iradiasi matahari, Arduino ABSTRACTInformation about the output power of solar panels and the intensity of solar radiation are needed in the PV system to determine the characteristics of the power generated by the panel and the estimated amount of installed load. In this research, an Arduino-based data logger has been designed with a MicroSD card data storage media and a MS Excel data format. Power parameters are obtained using a voltage sensor module with the principle of a voltage divider and a current sensor with a shunt resistor. The radiation intensity is obtained from the Solar Power Meter sensor using a RS232 to TTL cable interface. The results show the average of voltage error is 36 mV or inaccuracy is 0.41% for the measurement range from 0.7 V to 24 V, while the average of current error is 10 mA or inaccuracy is 0.42% for the measurement from 0.3 A to 7.5 A. This inaccuracy value is still below the average value of standard measurement tools on the market about 1%, so the results of this design can be used for the purpose of measurements.Keywords: voltage, current, power, solar irradiation, Arduino","PeriodicalId":344430,"journal":{"name":"ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126278555","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Implementasi Moving Average Filter untuk Koreksi Kesalahan Sensor Pengukur Kedalaman Air","authors":"Utti Marina Rifanti, Herryawan Pujiharsono, Andri Setiawan, Jans Hendry","doi":"10.26760/elkomika.v8i2.432","DOIUrl":"https://doi.org/10.26760/elkomika.v8i2.432","url":null,"abstract":"ABSTRAKAspek utama yang membedakan sensor satu dengan yang lainnya adalah tingkat akurasinya. Pada penelitian ini, dibuat sistem untuk menurunkan tingkat deviasi untuk meminimalisir kesalahan hasil pengukuran pada sensor berbiaya murah. Sensor yang digunakan adalah sensor tekanan udara BMP180. Sensor tersebut digunakan untuk mengukur kedalaman berdasarkan tekanan udara dalam air. Moving Average Filter (MAF) digunakan untuk membuang pencilan data, sehingga didapatkan data yang lebih relevan yang kemudian digunakan untuk melakukan curve fitting. Kemudian dilakukan analisis regresi linear untuk menghasilkan persamaan yang berfungsi sebagai pengoreksi data terekam dari sensor tersebut. Pengujian sistem dilakukan melalui beberapa skenario lalu diambil persamaan yang menghasilkan nilai Mean Square Error (MSE) yang paling kecil. Berdasarkan hasil penelitian, diperoleh kesimpulan bahwa MAF mampu meningkatkan akurasi data hingga mencapai 99.12%.Kata kunci: sensor BMP180, koreksi kesalahan, regresi linear, moving average filter, mean square error ABSTRACTThe main aspect that distinguishes sensors from one another is the level of accuracy. In this study, a system was developed to reduce the level of deviation to minimize the measurement error on low-cost sensors. The sensor used is the air pressure sensor, BMP180. Then this sensor is used to measure water depth based on air pressure in water. The Moving Average Filter (MAF) method is used to get rid of outliers of data, to obtain more relevant data for curve fitting. Then a linear regression analysis is performed to produce a function as a correction of recorded data from the sensor. System testing is carried out through a number of scenarios and then the equation is chosen with the smallest Mean Square Error (MSE). Based on this research, MAF increases data accuracy up to 99.12%.Keywords: sensor BMP180, error correction, linear regression, moving average filter, mean square error","PeriodicalId":344430,"journal":{"name":"ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika","volume":"54 50","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141204183","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}