Garuda - Garba Rujukan Digital

Pengukuran RSSI Jaringan Sensor Nirkabel Berbasis ZigBee pada Berbagai Topologi Helmy Fitriawan; Roviq Cholifatul Rohman; Herlinawati Herlinawati; Sri Purwiyanti
Jurnal Rekayasa Elektrika Vol 16, No 2 (2020)
Publisher : Universitas Syiah Kuala

In order to get a good performance from a wireless sensor network, it is necessary to measure parameters of the network. RSSI (Received Signal Strength Indicator) is one of the network parameters that measure the signal strength received by a radio receiver in communication module. In this study the RSSI measurement experiment was performed in a wireless sensor network with the ZigBee protocol. Measurements were accomplished in three topologies, i.e. point-to-point, star, and mesh, both indoor and outdoor scenarios. Indoor measurements are carried out within the laboratory with concrete wall partition, while outdoor measurements are carried out in open space with the line-of-sight (LOS) conditions. XCTU software is used to measure RSSI measurements, by sending 100 data packets of 64 bytes with 1 second delivery intervals. Results show that the farther the data transmission distance, the RSSI value relatively decrease due to obstacles and reduced radio signal strength. While, in the mesh topology the addition of a router will also cause a slightly increase in the RSSI value.

Pengukuran RSSI Jaringan Sensor Nirkabel Berbasis ZigBee pada Berbagai Topologi Helmy Fitriawan; Roviq Cholifatul Rohman; Herlinawati Herlinawati; Sri Purwiyanti
Jurnal Rekayasa Elektrika Vol 16, No 2 (2020)
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17529/jre.v16i2.15750

In order to get a good performance from a wireless sensor network, it is necessary to measure parameters of the network. RSSI (Received Signal Strength Indicator) is one of the network parameters that measure the signal strength received by a radio receiver in communication module. In this study the RSSI measurement experiment was performed in a wireless sensor network with the ZigBee protocol. Measurements were accomplished in three topologies, i.e. point-to-point, star, and mesh, both indoor and outdoor scenarios. Indoor measurements are carried out within the laboratory with concrete wall partition, while outdoor measurements are carried out in open space with the line-of-sight (LOS) conditions. XCTU software is used to measure RSSI measurements, by sending 100 data packets of 64 bytes with 1 second delivery intervals. Results show that the farther the data transmission distance, the RSSI value relatively decrease due to obstacles and reduced radio signal strength. While, in the mesh topology the addition of a router will also cause a slightly increase in the RSSI value.

Steganografi Video H263 dengan Metode Discrete Cosine Transform Herlinawati Herlinawati
Electrician : Jurnal Rekayasa dan Teknologi Elektro Vol. 10 No. 1 (2016)
Publisher : Department of Electrical Engineering, Faculty of Engineering, Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/elc.v10n1.189

Intisari — Steganografi merupakan teknik penyembunyian sinyal informasi dengan cara menyisipkan informasi ke dalam media tertentu sehingga orang tidak menyadari keberadaan pesan tersebut. Penelitian yang dilakukan dengan menyisipkan pesan ke dalam video H263 menggunakan metode Discrete Cosine Transform, yaitu melakukan perubahan terhadap nilai koefisien DCT pada video sesuai dengan pesan masukan serta mengimplementasikan teknik steganografi menggunakan perangkat lunak XGP Desktop dan mengukur kualitas video menggunakan nilai PSNR (Peak Signal to Noise Ratio). Hasil akhir yang diperoleh adalah telah berhasil melakukan penyisipan pesan ke dalam video H263 dan dapat mengekstraksi kembali pesan tersebut menggunakan kunci yang sama. Hasil pengukuran kualitas video yang diperoleh menunjukkan bahwa semakin banyak pesan yang disisipkan maka kualitas video akan semakin buruk. Kata kunci — Steganografi, Discrete Cosine Transform, PSNR. Abstract — Steganography is a technique of hiding confidential information signal by inserting message into certain media so that people are not aware of the existence of the messrage. Research conducted by inserting messages into video H263 using Discrete Cosine Transform, which made changes to the value of DCT coefficients in a video in accordance with the input message and implement steganographic techniques using software XGP Desktop and measure video quality using PSNR (Peak Signal to Noise Ratio). The final results obtained is has succeeded in inserting messages into H263 video and can extract the message using the same key. Video quality measurement results obtained show that the more message that are inserted then the video quality will be worse. Keywords— Steganography, Discrete Cosine Transform, PSNR

Rancang Bangun Sistem Keamanan Kendaraan Bermotor Berbasis GPS (Global Positioning System) dan Koneksi Bluetooth Oka Kurniawan Saputra; Herlinawati Herlinawati
Electrician : Jurnal Rekayasa dan Teknologi Elektro Vol. 11 No. 3 (2017)
Publisher : Department of Electrical Engineering, Faculty of Engineering, Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/elc.v11n3.2059

Intisari--- Rancang bangun sistem keamanan kendaraan bermotor berbasis GPS dan koneksi Bluetooth dilengkapi fitur keamanan darurat dengan akurasi dan presisi yang menunjang terwujudnya sistem keamanan interaktif. Metode penelitian yang dilakukan berupa perancangan (perancangan perangkat keras dan aplikasi pada smartphone) dan pengujian (pengujian subsistem dan pengujian sistem keseluruhan). Data penelitian berupa data hasil pengujian subsistem komunikasi Bluetooth, deteksi GPS, komunikasi GSM, dan rele.Pengiriman data antara Bluetooth Module dan Bluetooth pada smartphone dapat mencapai 10 meter.Akurasi GPS Receiver yang digunakan adalah kurang dari 7 meter.Terdapat selisih 4 m hingga 18 m pada penentuan posisi kendaraan yang dilakukan oleh sistem dan smartphone.Hal ini dikarenakan kondisi lingkungan sangat berpengaruh terhadap akurasi data GPS yang diperoleh.Kata kunci--- GPS, GSM, Bluetooth, Sistem Keamanan, Smartphone. Abstract--- Design of motor vehicle security system based on GPS and Bluetooth connection on android smartphone equipped with an emergency safety feature with accruracy and precision that support the realization of interactive security system. This research method was done by design (design of hardware and applications on smartphones) and testing (testing subsystems and the overall system testing). The research data is data communication subsystem test result Bluetooth, GPS detection, GSM communication and action relay. Data transmission between Bluetooth module and Bluetooth on the smartphone can reach 10 meters.Accuracy GPS receiver that is used is less than 7 meters. There is a differenceof 4 m to 18 m in the positioning of vehicles carried by the system and smartphones. This is because environmental conditions greatly affect the accuracy of GPS data obtained.Keywords--- GPS, GSM, Bluetooth, Security System, Smartphone.

Sistem Pendingin Ikan Tenaga Surya Berbasis Mikrokontroler ATMEGA328 Muhammad Yasin; Herlinawati Herlinawati; Syaiful Alam
Electrician : Jurnal Rekayasa dan Teknologi Elektro Vol. 12 No. 1 (2018)
Publisher : Department of Electrical Engineering, Faculty of Engineering, Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/elc.v12n1.2069

Abstrak— Salah satu permasalahan yang sering dihadapi oleh nelayan adalah mengenai penanganan pasca penangkapan. Nelayan mengharapkan ikan yang ditangkap tetap segar sampai di tangan konsumen, sehingga dapat dijual dengan harga jual yang tinggi, tetapi fakta yang ada saat ini ikan hasil tangkapan sering mengalami perubahan baik secara fisik maupun kimia yang kemudian secara bertahap mengarah pada proses pembusukan sehingga mengakibatkan harga jual ikan menjadi berkurang. Tujuan dari penelitian ini adalah untuk merangcang sebuah pendingin ikan tenaga surya yang dapat mempertahankan suhu dengan jangka suhu 0-5°C dan dapat diimplementasikan langsung di nelayan sehingga diharapkan dapat membantu nelayan dalam penanganan ikan pasca penangkapan. Alat ini mempunyai mempunyai kapasitas 35 Kg ikan. Pengujian alat ini dilakukan di desa Pulau Pasaran, Bandar lampung. Pengujian dilakukan selama 3 jam. Dari hasil pengujian didapatkan alat pendigin dapat mempertahankan suhu 0-5°C sesuai dengan standar. dan berdasarkan perhitungan alat ini dapat hidup selama 7,9 jam. Kata Kunci : Nelayan, Ikan, Pendingin, Panel Surya Intisari— One of the problems frequently faced by fisherman is about post-catched fish handling. Fishermen expect to have fresh fishes delivered for consumers in the market places to get high selling price when they are sold. However, the current fact is that the fishes are commonly found to be physically and chemically changed and then gradually, the quality is going low due to the loss of preservation which causes the selling price of the fishes decreases. This research aims to design a solar powered fish chiller system that can maintain the temperature in a range of 0°C until 5°C and be able to be implemented for fisherman directly, so that can help them in handling fish after catching. The instrument has a capacity in the amount of 35 kilograms fish. It is tested in a village of Pasaran Island, Bandar Lampung. The testing periode that was carried out is 3 hours. The analysis of the data concludes the chiller system can maintain the standard temperature between 0°C and 5°C and exxtrapolation of the analysis states that the system can be active in 7,9 hours. Keywords : Fisherman, fish, chiller, solar panel

Deteksi Tingkat Kematangan Buah Tomat dengan Metode Fuzzy Logic Menggunakan Modul Kamera Raspberry PI Nadia Muthiati; Herlinawati Herlinawati; Sri Ratna Sulistiyanti; Sri Purwiyanti
Electrician : Jurnal Rekayasa dan Teknologi Elektro Vol. 13 No. 2 (2019)
Publisher : Department of Electrical Engineering, Faculty of Engineering, Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/elc.v13n2.2105

Intisari — Proses pemanenan buah tomat dapat dilakukan menggunakan metode visual dengan memperhatikan warna atau ukuran dari buah. Kemajuan teknologi menggunakan bantuan komputer membuat pemanenan dan pendeteksian kematangan buah tomat semakin mudah. Informasi kematangan buah tomat dapat diperoleh dengan cara pengolahan citra dengan bantuan fuzzy logic menggunakan metode Tsukamoto. Pada penelitian ini beberapa sampel buah tomat diambil nilai RGB melalui pengolahan citra sesuai dengan tingkat kematangannya, diantaranya mentah, setengah matang, dan buah matang. Setelah nilai RGB didapat maka akan diproses ke dalam fuzzy logic untuk mendapatkan informasi kematangan melalui aturan-aturan yang telah dibuat dan diintegrasikan menggunakan Raspberry Pi. Hasil penelitian ini menunjukan bahwa kondisi yang baik untuk melakukan pendeteksian buah tomat salah satunya yaitu pada kondisi indoor 100 Lux berlatar belakang gelap. Hal ini mungkin dikarenakan tidak terdapat pantulan cahaya berlebih sehingga citra yang diambil nilai RGBnya tidak terlalu tinggi dan mengurangi terjadinya kesalahan pembacaan informasi kematangan dalam proses fuzzy logic.Kata kunci — Image Processing, Fuzzy Logic, Modul Kamera Raspberry Pi.Abstract — The process of harvesting tomatoes is usually done by the visual method by looking at the color or the size of the fruit. Technological advancements by using computer assistance make harvesting and detecting the ripening process of tomatoes easier. The information of the process of Tomato’s ripening can be obtained by the image processing by using Tsukamoto Fuzzy-Logic. In this research some samples of tomatoes’ RGB values were taken through image processing in accordance with the ripening level, between unripe, under-ripe, and ripe fruit. After the RGB value is obtained, it will be processed into fuzzy logic to obtain the ripening level information through rules that have been created and integrated by using Raspberry-Pi. The result of this research indicates that a good condition for detecting tomatoes is in 100 Lux conditions with dark background. This might be because there is no excessive light reflection, so that the RGB value of the image is not too high and reduces the error of reading the ripening level in the fuzzy logic process.Keywords— Image Processing, Fuzzy Logic, Raspberry Pi Camera Module.

Rancang Bangun Prototype Pengering Gabah Otomatis Dengan Pengendali Sensor Kelembaban Dan Suhu Berdasarkan Suhu Ruang Berbasis Mikrokontroler ATmega 328 Mohammad Al Faris; Sri Purwiyanti; Herlinawati Herlinawati
Electrician : Jurnal Rekayasa dan Teknologi Elektro Vol. 14 No. 1 (2020)
Publisher : Department of Electrical Engineering, Faculty of Engineering, Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/elc.v14n1.2142

Intisari Pada zaman modern banyak produk-produk manufaktur yang serba otomatis untuk membantu manusia dalam mengerjakan pekerjaannya. Salah satu kerja yang membutuhkan bantuan mesin adalah pengering gabah. Pada saat ini pengeringan gabah dilakukan dengan konvensional yaitu dijemur di terik matahari dan bila cuaca mendung maka tidak dilakukan penjemuran. Oleh karena itu dibutuhkan alat yang terintegrasi. Alat pengeringan otomatis ini menggunakan mikrokontroler untuk mengatur kerja blower DC, motor driver L298N, Motor DC pengaduk gabah, Sensor suhu, dan Sensor kelembaban & suhu. Pada alat ini menggunakan gabah dengan massa 0.5 kg, 1 kg, 1.5 kg, 2 kg dan 3 kg waktu pengeringan gabah dengan rata-rata waktu di setiap massa 36, 52.6, 65.8, 73.2, dan 83.2 menit dengan kelembaban dan suhu awal sama yaitu 80 persen dan 26 C dan daya 120 Watt. Hasil dalam Proses selanjutnya yaitu dengan kelembaban awal 40 persen, 50 persen dan 60 persen dengan rata-rata waktu berturut-turut yaitu 34.8, 47.8, dan 63.2 menit. Dan hasil dari proses pengujian terakhir yang dilakukan di pagi hari dengan kelembaban dan suhu awal 89 persen dan 20 persen, siang hari dengan kelembaban dan suhu awal 80 persen dan 26 C dan sore hari dengan kelembaban dan suhu awal 85 persen dan 23 C didapatkan rata-rata waktu berturu-turut yaitu 75, 52.6 dan 63.4 Menit. Kelembaban standar yang telah diatur adalah 32 persen kelembaban tersebut hampir setara dengan kelembaban gabah yang telah disurvey yaitu 25 persen di tengah terik matahari dengan suhu 35 C. Kata kunci Mikrokontroler, Pengeringan Gabah, Motor DC. Abstract — In modern times many manufacturing products are completely automated to help people in their work. One job that requires the help of a machine is grain dryer. At this time grain drying is done conventionally, which is dried in the sun and when the weather is cloudy, drying is not done. Therefore we need an integrated tool. This automatic drying tool uses a microcontroller to regulate the work of DC blowers, L298N motor drivers, grain stirring DC motors, temperature sensors, and humidity & temperature sensors. In this tool using grain with a mass of 0.5 kg, 1 kg, 1.5 kg, 2 kg and 3 kg of grain drying time with an average time in each mass 36, 52.6, 65.8, 73.2, and 83.2 minutes with the same humidity and initial temperature ie 80 percents and 26 C and 120 Watt power. The results in the next process are with initial humidity of 40 percents, 50 percents and 60 percents with an average of consecutive times of 34.8, 47.8, and 63.2 minutes. And the results of the last testing process conducted in the morning with humidity and initial temperature of 89 percents & 20 C, during the day with humidity and initial temperature of 80 percents and 26 C and in the afternoon with humidity and initial temperature of 85 percents and 23 percents obtained an average time respectively 75, 52.6 and 63.4 Minutes. The standard humidity that has been set is 32 percents, the humidity is almost equivalent to the humidity of the grain that has been surveyed, which is 25 percents in the hot sun with a temperature of 35ºC. Keywords— Microcontroller, Grain Drying, DC Motor.

Mesin Pemilah Ikan Secara Otomatis di Kecamatan Padang Cermin Kabupaten Pesawaran Bandar Lampung Herlinawati Herlinawati; Helmy Fitriawan; Ahmad Saudi Samosir; Sri Purwiyanti
Jurnal Pengabdian Kesehatan Beguai Jejama Vol 1, No 2 (2020): Jurnal Pengabdian Kesehatan Beguai Jejama Volume 1 Nomor 2 Agustus 2020
Publisher : Poltekkes Kemenkes Tanjung Karang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26630/jpk.v1i2.46

Besarnya hasil produksi perikanan laut di Padang Cermin Kabupaten Pesawaran merupakan potensi yang dapat dijadikan unggulan untuk mempromosikan nama Padang Cermin sebagai lokasi minawisata. Salah satu tahap penting dalam pengolahan ikan adalah sorting atau pemilahan ikan. Selama ini proses pemilahan ini dilakukan menggunakan tenaga manusia yang memiliki keterbatasan dalam kecepatan dan ketelitian pemilahan. Oleh karena itu dibutuhkan mesin pemilah ikan secara otomatis untuk membantu dalam proses pemilahan ikan tersebut. Kegiatan pengabdian kepada masyarakat ini bertujuan untuk mengaplikasikan teknologi yang dihasilkan dari penelitian di instansi akademis ke masyarakat yang membutuhkan. Dalam hal ini, teknologi yang dikenalkan di masyarakat adalah teknologi mesin pemilah ikan secara otomatis. Mesin pemilah ini menggunakan motor DC sebagai penggerak pada bagian ayakan dan langsung ke wadah penampung untuk menjatuhkan ikan. Mesin pemilah ikan teri skala rumah tangga yang dihasilkan telah diinstal di salah satu tempat pengolahan ikan teri di Padang Cermin, Kabupaten Pesawaran Bandar Lampung. Sebagai hasilnya, mesin berhasil melakukan pemilahan ikan teri secara otomatis dan menghasilkan tiga macam kualitas ikan berdasarkan ukurannya. Dengan demikian mesin ini berhasil membantu nelayan dalam proses pemilahan ikan dengan lebih cepat dan teliti.

Rancang bangun sistem kontrol suhu air kolam benih lobster dengan pengendali PID berbasis mikrokontrol ESP32 Herlinawati; I K Mubarok; A Yudamson
Prosiding Seminar Nasional Ilmu Teknik Dan Aplikasi Industri Fakultas Teknik Universitas Lampung Vol. 6 (2023): Prosiding Seminar Nasional Nasional Ilmu Teknik dan Aplikasi Industri (SINTA) 2023
Publisher : Fakultas Teknik Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar

Proses pengendalian suhu air kolam benih lobster sebelumnya belum dilakukansecara optimal karena belum adanya perangkat yang memadai, sehingga dapatmenurunkan tingkat pertumbuhan dan sintasan benih lobster yang berpengaruhbesar pada lobster yang dihasilkan. Pada penelitian ini dilakukan denganmerancang sistem kontrol suhu untuk air kolam benih lobster menggunakanpengendali PID dengan mikrokontroler ESP32, sensor DS18B20, dan perangkatpeltier. Penelitian ini dilakukan pada akuarium dengan volume air 15 – 25 literyang dikondisikan pada suhu ruangan. Hasil rata-rata nilai error pada pengjuiansensor sebesar 0,18?, kemudian untuk proses pengamatan data dilakukanmelalui internet setiap 30 menit sekali. Hasil dari penelitian ini menunjukanbahwa alat mampu menjaga suhu tetap stabil dengan nilai rata-rata suhu padanilai set point 28? yaitu 28,0441? dan pada nilai set point 25,5? yaitu25,5062?.

Design Of A Security System Tool For Tapis Fabric Object In Lampung Museum Based On Internet Of Things (IoT) Technology Purwiyanti, Sri; Irawan, Dery; Herlinawati, Herlinawati
Journal of Engineering and Scientific Research Vol. 6 No. 1 (2024)
Publisher : Faculty of Engineering, Universitas Lampung Jl. Soemantri Brojonegoro No.1 Bandar Lampung, Indonesia 35141

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jesr.v6i1.136

The Lampung Museum has many historical collections, one of which is tapis cloth. The tapis cloth collection at the Lampung Museum is still not safe because the layout is still open and the distance is far from CCTV. This study aims to design a series of security systems using two Passive Infra Red (PIR) sensor inputs and a buzzer output and a VC0706 camera at the Lampung Museum which can be monitored directly remotely with notifications on the Telegram platform. The research method used is design and testing (subsystem testing and overall system testing). The data from this research are the results of system design, how the security system works on filter cloth objects and the overall system. The security system was tested using Telkomsel, Indosat and Tri providers. The results obtained for image quality 640 x 480 Pixels obtained an average delivery time from Telkomsel providers for 25.2 seconds, providers for Indosat 27.4 seconds and Tri providers for 28.6 seconds. then an experiment was carried out with 3 different image qualities, namely 640 x 480 Pixels, 320 x 240 Pixels and 160 x 120 Pixels with Telkomsel provider with an average sending value for image quality 640 x480 Pixels for 25.2 seconds, image quality 320 x 240 Pixels for 20.5 seconds and 160 x 120 Pixel image quality for 17.7 seconds. Then testing sending Telegram notifications remotely from a security system tool and obtained that the time sent notifications from the Arduino IDE serial monitor is the same as the time received notifications on the Telegram platform, which means sending notifications takes place in real time. The Lampung Museum has many historical collections, one of which is tapis cloth. The tapis cloth collection at the Lampung Museum is still not safe because the layout is still open and the distance is far from CCTV. This study aims to design a series of security systems using two Passive Infra Red (PIR) sensor inputs and a buzzer output and a VC0706 camera at the Lampung Museum which can be monitored directly remotely with notifications on the Telegram platform. The research method used is design and testing (subsystem testing and overall system testing). The data from this research are the results of system design, how the security system works on filter cloth objects and the overall system. The security system was tested using Telkomsel, Indosat and Tri providers. The results obtained for image quality 640 x 480 Pixels obtained an average delivery time from Telkomsel providers for 25.2 seconds, providers for Indosat 27.4 seconds and Tri providers for 28.6 seconds. then an experiment was carried out with 3 different image qualities, namely 640 x 480 Pixels, 320 x 240 Pixels and 160 x 120 Pixels with Telkomsel provider with an average sending value for image quality 640 x480 Pixels for 25.2 seconds, image quality 320 x 240 Pixels for 20.5 seconds and 160 x 120 Pixel image quality for 17.7 seconds. Then testing sending Telegram notifications remotely from a security system tool and obtained that the time sent notifications from the Arduino IDE serial monitor is the same as the time received notifications on the Telegram platform, which means sending notifications takes place in real time.

Title

Found 21 Documents
Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title Search

Found 21 Documents Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title

Found 21 Documents
Search