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Photoacoustic Signal of Nanobubbles Induced in PEGylated Gold-Nanorod Colloid Istas Pratomo Manalu
Piston: Journal of Technical Engineering Vol 2, No 1 (2018)
Publisher : Prodi Teknik Mesin

We have developed a photoacoustic (PA) measurement system using a broadband ultrasonic transducer to detect the PA signals induced in a gold nanorod (GNRs) colloid irradiated by the nanosecond-pulsed laser beam. This study will investigate the PA signals of PEG-GNRs at longitudinal surface plasmon resonance. Several factors including aspect ratio of GNR, pulse energy, concentration, and wavelength are varied to investigate these effects on the PA signal. We show that at the certain condition the generated PA signal of PEG-GNRs stronger than uncoated GNRs. Moreover, the PA signals of PEG- GNRs are more stable than uncoated GNRs in the same condition.

Prototipe Sistem Kunci Locker Berbasis RFID dan NodeMCU Istas Pratomo Manalu; Andi Manullang; Melani Siagian
Piston: Journal of Technical Engineering Vol 5, No 2 (2022)
Publisher : Prodi Teknik Mesin

Sistem penguncian locker sangat penting bagi instansi-instansi yang memberikan layanan-layanan umum seperti penitipan barang di supermarket, perusahaan, sport center, sekolah atau kampus. Bahkan penggunaan locker dapat diaplikasikan di rumah. Kebanyakan dari pemilik instansi tersebut masih menggunakan penguncian manual yang cenderung memiliki banyak kelemahan. Pada penelitian ini, sistem yang dibangun adalah sistem penguncian locker dengan memanfaatkan teknologi RFID, NodeMCU, Web aplikasi serta sistem keamanan. RFID digunakan sebagai sistem akses locker. Sistem ini menggunakan satu RFID reader untuk multiple locker, dan logic pengolahan data terletak pada NodeMCU. Web aplikasi yang dibangun digunakan admin untuk mendaftarkan user berupa identitas dan ID pada database. Sistem berhasil dibuat sesuai dengan skenario yang diharapkan. User yang memiliki id yang sesuai dapat mengakses locker, dan yang tidak sesuai tidak dapat mengakses locker. Sistem ini juga menggunakan tag master yang hanya dimiliki admin untuk dapat mengakses setiap locker user yang mengalami kehilangan tag atau kerusakan tag.

Greenhouse Monitoring and Controlling System, Study Case "Strawberry" Istas Pratomo Manalu; Sanita Simamora; Ruben Mual Siregar; Alexius Humbang Manik; Andriono Manalu
Piston: Journal of Technical Engineering Vol 5, No 1 (2021)
Publisher : Prodi Teknik Mesin

Penerapan teknologi di bidang pertanian telah mengalami kemajuan dan perkembangan terhadap ilmu teknologi. Teknologi yang lebih spesifik digunakan adalah IoT (Internet of Things), dimana pemanfaatan jaringan internet menjadi salah satu faktor utama dalam mengembangkan mesin-mesin teknologi yang bersifat otomatis guna meningkatkan sistem pertanian. Oleh karena itu penggunaan IoT adalah sangat bermanfaat dalam bidang pertanian khususnya dalam budidaya stroberi yang memerlukan pengendalian khusus dalam setiap proses pemeliharaannya yaitu untuk beberapa aktivitas utama seperti penyiraman, pemupukan, dan pemantauan suhu serta kondisi tanaman secara real-time. Melalui penelitian dan pengembangan ini diharapkan sistem IoT dapat membantu aktivitas budidaya stroberi yang dirancang menggunakan NodeRED sebagai visual programming dan terhubung dengan protokol MQTT sebagai protokol dalam transmisi data dan informasi. Node-RED sebagai teknologi terbaru dimanfaatkan untuk dapat memudahkan proses penerapan sistem IoT dan melakukan pengontrolan dan pemantauan terhadap setiap data dan perintah yang diterima dan dibuat. Metode penelitian dimulai dari pengumpulan data, mendesain model, mengumpulkan alat dan bahan, melakukan pengujian, implementasi alat kepada objek, dan evaluasi terhadap setiap proses implementasi yang telah berjalan. Target yang ingin dicapai dalam penelitian ini adalah mampu mengurangi tenaga petani, efisiensi waktu dengan adanya sistem automation, dan mampu menjaga proses pertumbuhan tanaman stroberi secara optimal.

Utilization of GPS Data of Logistic Truck as a Delivery Reporting System Istas Pratomo Manalu; Albertinus Daniel Siahaan; Okaria Veronika Simanjuntak; Dedy Samhaz Pardede; David Calvin Tobing
Piston: Journal of Technical Engineering Vol 6, No 1 (2022)
Publisher : Prodi Teknik Mesin

We propose a tracking system that can provide information from the truck coordinate analysis. Firstly, GSM will transmit the coordinates of the truck in real time via HTTP protocol to a website that has been hosted using shared hosting and displays a travel map on the Map Box API application. We also use MYSQL as a storage of truck coordinates. Reports will be generated after the truck arrives at the company. For system accuracy level, we set the delivery duration to the database every 10 seconds so that the generated path is closer to the original path. We compared our system with google maps to observe how accurate the system was built. The length difference of the track is 0.01 Km. The system also shows a very small deviation of starting point is 0.111322 meters and at the end point is 0.729938354 meters. While, the report contains truck ID, driver's identity, departure time, exact time, arrival time, distance, type of goods, quantity of goods, origin, destination, service, date, initial odometer, used odometer which later the results can be printed into a final report of truck usage.

Photoacoustic Signal of Nanobubbles Induced in PEGylated Gold-Nanorod Colloid Istas Pratomo Manalu
Piston: Journal of Technical Engineering Vol 2, No 1 (2018)
Publisher : Prodi Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32493/pjte.v2i1.3220

We have developed a photoacoustic (PA) measurement system using a broadband ultrasonic transducer to detect the PA signals induced in a gold nanorod (GNRs) colloid irradiated by the nanosecond-pulsed laser beam. This study will investigate the PA signals of PEG-GNRs at longitudinal surface plasmon resonance. Several factors including aspect ratio of GNR, pulse energy, concentration, and wavelength are varied to investigate these effects on the PA signal. We show that at the certain condition the generated PA signal of PEG-GNRs stronger than uncoated GNRs. Moreover, the PA signals of PEG- GNRs are more stable than uncoated GNRs in the same condition.

Prototipe Sistem Kunci Locker Berbasis RFID dan NodeMCU Istas Pratomo Manalu; Andi Manullang; Melani Siagian
Piston: Journal of Technical Engineering Vol 5, No 2 (2022)
Publisher : Prodi Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32493/pjte.v5i2.19485

Sistem penguncian locker sangat penting bagi instansi-instansi yang memberikan layanan-layanan umum seperti penitipan barang di supermarket, perusahaan, sport center, sekolah atau kampus. Bahkan penggunaan locker dapat diaplikasikan di rumah. Kebanyakan dari pemilik instansi tersebut masih menggunakan penguncian manual yang cenderung memiliki banyak kelemahan. Pada penelitian ini, sistem yang dibangun adalah sistem penguncian locker dengan memanfaatkan teknologi RFID, NodeMCU, Web aplikasi serta sistem keamanan. RFID digunakan sebagai sistem akses locker. Sistem ini menggunakan satu RFID reader untuk multiple locker, dan logic pengolahan data terletak pada NodeMCU. Web aplikasi yang dibangun digunakan admin untuk mendaftarkan user berupa identitas dan ID pada database. Sistem berhasil dibuat sesuai dengan skenario yang diharapkan. User yang memiliki id yang sesuai dapat mengakses locker, dan yang tidak sesuai tidak dapat mengakses locker. Sistem ini juga menggunakan tag master yang hanya dimiliki admin untuk dapat mengakses setiap locker user yang mengalami kehilangan tag atau kerusakan tag.

Greenhouse Monitoring and Controlling System, Study Case "Strawberry" Istas Pratomo Manalu; Sanita Simamora; Ruben Mual Siregar; Alexius Humbang Manik; Andriono Manalu
Piston: Journal of Technical Engineering Vol 5, No 1 (2021)
Publisher : Prodi Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32493/pjte.v5i1.14722

Penerapan teknologi di bidang pertanian telah mengalami kemajuan dan perkembangan terhadap ilmu teknologi. Teknologi yang lebih spesifik digunakan adalah IoT (Internet of Things), dimana pemanfaatan jaringan internet menjadi salah satu faktor utama dalam mengembangkan mesin-mesin teknologi yang bersifat otomatis guna meningkatkan sistem pertanian. Oleh karena itu penggunaan IoT adalah sangat bermanfaat dalam bidang pertanian khususnya dalam budidaya stroberi yang memerlukan pengendalian khusus dalam setiap proses pemeliharaannya yaitu untuk beberapa aktivitas utama seperti penyiraman, pemupukan, dan pemantauan suhu serta kondisi tanaman secara real-time. Melalui penelitian dan pengembangan ini diharapkan sistem IoT dapat membantu aktivitas budidaya stroberi yang dirancang menggunakan NodeRED sebagai visual programming dan terhubung dengan protokol MQTT sebagai protokol dalam transmisi data dan informasi. Node-RED sebagai teknologi terbaru dimanfaatkan untuk dapat memudahkan proses penerapan sistem IoT dan melakukan pengontrolan dan pemantauan terhadap setiap data dan perintah yang diterima dan dibuat. Metode penelitian dimulai dari pengumpulan data, mendesain model, mengumpulkan alat dan bahan, melakukan pengujian, implementasi alat kepada objek, dan evaluasi terhadap setiap proses implementasi yang telah berjalan. Target yang ingin dicapai dalam penelitian ini adalah mampu mengurangi tenaga petani, efisiensi waktu dengan adanya sistem automation, dan mampu menjaga proses pertumbuhan tanaman stroberi secara optimal.

Utilization of GPS Data of Logistic Truck as a Delivery Reporting System Istas Pratomo Manalu; Albertinus Daniel Siahaan; Okaria Veronika Simanjuntak; Dedy Samhaz Pardede; David Calvin Tobing
Piston: Journal of Technical Engineering Vol 6, No 1 (2022)
Publisher : Prodi Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32493/pjte.v6i1.22433

We propose a tracking system that can provide information from the truck coordinate analysis. Firstly, GSM will transmit the coordinates of the truck in real time via HTTP protocol to a website that has been hosted using shared hosting and displays a travel map on the Map Box API application. We also use MYSQL as a storage of truck coordinates. Reports will be generated after the truck arrives at the company. For system accuracy level, we set the delivery duration to the database every 10 seconds so that the generated path is closer to the original path. We compared our system with google maps to observe how accurate the system was built. The length difference of the track is 0.01 Km. The system also shows a very small deviation of starting point is 0.111322 meters and at the end point is 0.729938354 meters. While, the report contains truck ID, driver's identity, departure time, exact time, arrival time, distance, type of goods, quantity of goods, origin, destination, service, date, initial odometer, used odometer which later the results can be printed into a final report of truck usage.

LoRa-based IoT Device for Water Quality Monitoring (Case Study: Lake Toba) Gloria Polly, Victori Steev; Manalu, Andriono; Simbolon, Kiki Tristianti; Manalu, Istas Pratomo
Piston: Journal of Technical Engineering Vol. 7 No. 2 (2024)
Publisher : Program Studi Teknik Mesin Universitas Pamulang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32493/pjte.v7i2.35854

Lake Toba, the largest lake in Indonesia, faces water pollution problems due to many sources of household waste, fertilizer waste from rice fields, and fish feed waste. Therefore, a water quality monitoring system is needed to warn the public and visitors early before they carry out recreational activities or use water from the lake. This research aims to build a system that can monitor the water quality of Lake Toba in real-time using LoRa technology, as well as analyze the water quality of Lake Toba with the parameters pH, dissolved oxygen, temperature, and turbidity. As a result, we created a water quality monitoring system and obtained water quality analysis results from 3 locations that are always busy with tourists. The results of measurements at Pantai Pasir Putih received a temperature range of 25.5°C to 28.5°C, turbidity ranged from 4.1 to 5.5 NTU; pH levels varied between 6.8 to 7.2, dissolved oxygen levels ranged from 8 .0 mg/L to 9.0 mg/ L. The results of measurements at Siregar Aek Nalas recorded temperatures ranging from 25°C to 28°C, turbidity levels of approximately 11.49 NTU and 14.65 NTU, pH levels fluctuating between 9 and 11, dissolved oxygen levels ranging from 29 mg/L to 32 mg/L. The temperature obtained for Pantai Lumban Bulbul was 25°C, turbidity ranged from 0.62 NTU to 2.60 NTU, the pH level was also consistently measured at 8, and dissolved oxygen levels were recorded at 9-10 mg/L.

Unreal Engine Based MCS Program Using Microcontroller Wemos D1 Mini, MPU-9250 Sensor and UDP Protocol Simatupang, Frengki; Manalu, Istas Pratomo
Piston: Journal of Technical Engineering Vol. 8 No. 1 (2024)
Publisher : Program Studi Teknik Mesin Universitas Pamulang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32493/pjte.v8i1.40210

The Motion Capture System (MCS) is a series of steps involving the capture, processing, and mapping of human, animal, or object movements into virtual characters. This process includes motion recording, data processing with computers, and mapping the results into digital models. This article discusses the use of MCS for realistically reconstructing and simulating behavior, which is valuable in various applications such as entertainment, animation, computer games, sports, and rehabilitation. MCS faces challenges in accurately capturing the diversity and complexity of body movements, requiring advanced hardware and software. Unreal Engine, a development platform known for its ability to produce high-quality graphics and realistic physics systems, is often used to integrate MCS. The MPU9250 sensor, a 9-axis inertial sensor combining an accelerometer, gyroscope, and magnetometer, is used in this project to detect linear motion, rotation, and orientation with high accuracy. This research aims to develop an MCS program based on Unreal Engine using the MPU9250 sensor and the UDP protocol, with the Wemos D1 Mini as the client module to process and transmit sensor data via Wi-Fi. This process involves collecting sensor data, transmitting data via UDP, and processing the data in Unreal Engine to control the movement of objects or characters. Sensor calibration is performed to obtain accurate reference values, and the collected data is used to calculate pitch, roll, and yaw values. This data is then sent to Unreal Engine to display animations corresponding to human movements. Testing shows that the generated movements align with those demonstrated, although there are minor acceptable errors. This research highlights the importance of combining sensor technology and software to produce an accurate and responsive motion control system, providing an interactive and realistic user experience.

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