Sistem Pengendali Suhu dan Kelembapan Tanah Bilik Tanaman Selada Berbasis IoT Menggunakan Aplikasi Whatsapp

Selada merupakan salah satu jenis tanaman sayuran yang mudah untuk dibudidaya dan dapat tumbuh subur dengan optimal pada suhu 25°C - 28°C dan kelembapan tanah 65% - 78%. Kendala keterbatasan lahan yang dimiliki menyebabkan sulitnya melakukan budidaya tanaman selada. Bilik tanaman adalah alternatif solusi untuk permasalahan tersebut. Bilik tanaman dibuat seperti ruangan bertingkat yang berisi susunan rak yang diisi tanah untuk menanam selada. Sistem ini menggunakan arduino uno, sensor suhu DHT22, sensor kelembapan tanah YL69, LCD, kipas DC, solenoid valve, dan raspberry pi. Hasil pengujian sistem, saat nilai suhu yang terdeteksi oleh sensor DHT22 lebih besar sama dengan 28°C maka sistem secara otomatis mengaktifkan kipas untuk mendinginkan bilik, dan saat suhu mencapai kurang atau sama dengan 25°C kipas secara otomatis mati. Untuk nilai kelembapan tanah, saat sensor YL69 kurang atau sama dengan 65% maka sistem secara otomatis menyiram tanaman dan saat kelembapan tanah lebih besar atau sama dengan 78% maka sistem berhenti menyiram tanaman. Semua kondisi sensor tersebut ditampilkan pada LCD I2C 16×2. Untuk hasil pengujian aplikasi whatsapp, saat pemilik mengirimkan perintah “cek tanaman”, maka sistem berhasil mengirimkan notifikasi keadaan bilik seperti suhu, kelembapan tanah, kipas dan apakah sistem sedang menyiram tanaman atau tidak.

Prototype System Water Level Reservoir untuk Pengendalian Kelebihan Air dengan Mikrokontroller Arduino Uno R3

PDAM Loa Kulu Branch still uses sticks or poles as an indicator of the water level in the reservoir. Reservoir is a place to store clean water production from PDAM, the weakness of using sticks or poles is when the operator does not monitor continuously causing air loss when production becomes large. The goal of the study was to design a water-level prototype to control excess water in the reservoir. The method used is a prototype with the stage of gathering information through interviewing PDAM staff, creating and repairing prototypes and testing prototypes. The test used hardware consisting of Arduino uno r3, ultrasonic sensor hc-sr04, flowmeter sensor yf-s201, 16 x 2 lcd, relay module, buzzer, solenoid valve 12 V_dc, pump 12 V_dc and display measurement results in the visual studio application 2019. Our findings are that the length of reservoir charging with an average input discharge of 3.6 liters / minute is 2.93 minutes. As for the length of emptying the reservoir with an average output discharge of 1.06 liters / minute is 12.10 minutes. The conclusion of this study is that the system can monitor the water level inside the reservoir automatically and know the time needed for the feeling and emptying process of the reservoir.

Prototype System Water Level Reservoir untuk Pengendalian Kelebihan Air dengan Mikrokontroller Arduino Uno R3

PDAM Loa Kulu Branch still uses sticks or poles as an indicator of the water level in the reservoir. Reservoir is a place to store clean water production from PDAM, the weakness of using sticks or poles is when the operator does not monitor continuously causing air loss when production becomes large. The goal of the study was to design a water-level prototype to control excess water in the reservoir. The method used is a prototype with the stage of gathering information through interviewing PDAM staff, creating and repairing prototypes and testing prototypes. The test used hardware consisting of Arduino uno r3, ultrasonic sensor hc-sr04, flowmeter sensor yf-s201, 16 x 2 lcd, relay module, buzzer, solenoid valve 12 V_dc, pump 12 V_dc and display measurement results in the visual studio application 2019. Our findings are that the length of reservoir charging with an average input discharge of 3.6 liters / minute is 2.93 minutes. As for the length of emptying the reservoir with an average output discharge of 1.06 liters / minute is 12.10 minutes. The conclusion of this study is that the system can monitor the water level inside the reservoir automatically and know the time needed for the feeling and emptying process of the reservoir.

Prototype Sistem Monitoring Kekeruhan Sumber Mata Air Berbasis Internet of Things

Water is very important for the life of living things on earth. The function of water for life cannot be replaced, but water taken directly from springs often experiences turbidity which usually occurs during the rainy season where excessive rainwater intensity can affect the clarity of the water flowing into people's homes. From this problem, it is necessary to design a monitoring sistem for the turbidity of water flowing into the main tank which can be monitored via laptops, computers or cellphones that have internet access that can monitor in real-time and in the form of graphs and data stored in My Structured Query language (mysql) in this design. Using the nodemcu esp8266 which controls the tool in the design, the turbidity sensor is used to detect water turbidity, the ultrasonic sensor is used to detect the water level in the main tank, the relay is used to control the electric current, the solenoid valve is used to close the valve according to the conditions given with the design results of 120 ntu down and water height > 15 cm then the on relay and solenoid valve open the valve so that water can flow into the reservoir, while 121 ntu up and water height < 5 cm then the off relay and solenoid valve close the valve, the test is done using blackbox testing and the results of this test that the function on the sistem is 100% appropriate.

The Computational Fluid Dynamics (CFD) Analysis of the Pressure Sensor Used in Pulse-Operated Low-Pressure Gas-Phase Solenoid Valve Measurements

This paper presents a flow analysis of the original pressure sensor used to determine times until full opening and closing of the pulse-operated low-pressure gas-phase solenoid valve. The sensor in question, due to the fast variation of the process lasting several milliseconds, has high requirements in terms of response time and ability to identify characteristic parameters. A CFD code has been employed to successfully model the flow behavior of the original pressure sensor used to determine times until full opening and closing of the pulse-operated low-pressure gas-phase solenoid valve at different inlet flow conditions, using the Eulerian multiphase model, established on the Euler–Euler approach, implemented in the commercial CFD package ANSYS Fluent. The results of the modelling were validated against the experimental data and also give more comprehensive information on the flow, such as the plunger displacement waveform. The flow calculations were dynamic in nature; therefore, the experimental plunger displacement waveforms were entered as input in the software for dynamic mash implementation. In identifying the times until full opening and closing, the characteristic points of the pressure waveform on the pressure sensor plate were adopted. CFD flow calculations confirmed the accuracy of identifying the times until full opening and closing by relating them to the results from the plunger displacement sensor. The validation of the results of calculations with the analyzed sensor and the original stand also confirmed the correctness of the use of this type of method for the assessment of gas injector operating times. In the case of time until full opening, the CFD calculations were shown to be consistent with experimental tests, with only a few cases where the relative difference with respect to the displacement sensor reached 3%. The situation was slightly worse in the case of time until full closing, where the results of CFD calculations were in agreement with the displacement sensor, while the experimental test stands had a relative difference of up to 21%. It should be remembered that the sensor evaluates times below 5 × 10−3 s, and its construction and response time determine the use depending on the adopted level of accuracy.

Multi-objective Optimization of High-Speed Solenoid Valve for Biodiesel Electronic Unit Pump

Background: A larger response delay of a high-speed solenoid valve will cause inaccurate fuel injection timing and imprecise cycle injection quantity, resulting in diesel engine emission and increased fuel consumption. Objective: Biodiesel as an ideal alternative fuel has exceptional advantages in energy conservation, emission reduction, and low-carbon environmental protection; however, matching with Electronic Unit Pump (EUP) and its impacts on solenoid valve operation need to be further studied. Method: In the present work, a numerical model of EUP fueled with biodiesel was established in an AMESim environment, which was validated by the experiment. Then, combined with the Design of Experiments (DOE) method, key parameters influencing the solenoid valve response delay were predicted: armature residual air gap, spring preload, poppet valve half-angle, valve needle diameter, and poppet valve diameter. Finally, taking the response delay time of solenoid valve as targets, multi-objective optimization model for high-speed solenoid valve was established using NSGA-II (non-dominated sorting genetic algorithm-II) genetic algorithm in modeFRONTIER platform. Results: The optimized results showed that the delay time of the solenoid valve closing is reduced by 6%, the opening delay time is reduced by 20.8%, the injection pressure peak is increased by 1.8MPa, which is beneficial to accurate injection quantity and the application of biodiesel in diesel engines.

Water Level Monitoring and Dam Valve Control over IOT

This project gives an outline for the development of an information system based on the existing systems with the utilization of some sensors and IOT. The cradle of this project is based on methodology of IOT. Water level in a dam needs to be maintained effectively to avoid complications. The quantity of water released is hardly ever correct resulting in wastage of water and it is impossible for a man to precisely control the gates without knowledge of exact water level and water inflow rate. We have developed a mechatronics based system. We have designed a system in which real time things are interconnected to web. Water level contactless Ultrasonic sensor is placed in tub connected through Arduino UNO to serve the same purpose automatically and forward the status to it. This system detects the level of water and estimate the water inflow rate in a tub and thereby control the Solenoid valve using IOT in a real-time basis. The water level is analysed using this sensor and updated in the web server using IOT module connected to the Arduino UNO. Arduino unit checks that input and upload the status of water level on web. Keywords: IOT (Internet of Things), Mechatronics, Ultrasonic sensor, Arduino UNO, Solenoid valve.