Abstrak. Penanaman bibit kangkung sesuai prosedur dilakukan dengan proses menajuk, proses menajuk memakan waktu yang lama, sehingga membuat petani melakukan penaburan bibit untuk mempersingkat waktu peanaman, namun berpotensi terjadi gagal panen akbiat bibit tidak tertanam. Tujuan penelitian ini yaitu membangun mobil robot penanam bibit kangkung. Metode yang diperlukan dalam membangun mobil robot ini meliputi, penghitungan rata-rata bedengan, perancangan mobil robot, perakitan, dan pengujian. Dari metode tersebut maka diperoleh hasil yang meliputi desain dan analisis desain, hasil pembuatan/perakitan, hasil pengujian dan hasil penanaman. Desain mobil robot memiliki ukuran sesuai ukuran rata-rata bedengan yang digunakan petani yaitu 1,6 m, hasil analisis menunjukan beban maksimum robot 28,80 kg dengan perpindahan maksimal 3,266 mm yang membuat chassis masih aman digunakan.Proses perakitan mobil robot meliputi komponen elektronika dan komponen chassis sesuai dengan hasil desain dan perancangan. Robot yang telah dirakit dilakukan pengujian. Pengujian elektronika menampilkan keluaran arus sebesar 3A, tegangan 12 volt dan tahanan 5,4 ohm, pada penggunaan baterai dengan kapasitas 7,4 Ah yang dapat bekerja selama 4,5 jam dengan menggunakan stepdown supaya arus stabil membuat kecepatan stabil dan tidak membuat komponen mobil robot hangus akibat loncatan tegangan. Karena mobil robot bekerja secara autonomous maka pengujian vision juga diperlukan sebagai indra penglihatan gerak pada mobil robot. Selama 4,5 jam mobil robot dapat menanam bibit dengan luas lahan 4,7 hektar (4788 m2).Design and Testing Mobile Robot Spinach Water Seed PlantingAbstract. Planting water spinach seeds according to the procedure were carried out by the process of crowning, the process took a long time, so it made farmers sow seeds to shorten the planting time, but there was a potential for crop failure due to not planting the seeds. The purpose of this research was to build a mobile robot water spinach seed planting. The methods needed to build this robot car included calculating the average bed, designing a robot car, assembling, and testing. From this method, the results obtained included design and design analysis, manufacturing/assembly results, testing results, and planting results. The mobile robot design had a size according to the average size of the beds used by farmers, namely 1.6 × 1.4 × 0.5 m, the analysis results showed that the robot's maximum load was 28.80 kg with a maximum displacement of 3.266 mm which made the chassis still safe to use. The robot car assembly process included electronic components and chassis components in accordance with the design and design results. The assembled robot was tested. Electronic testing displayed a current output of 3A, a voltage of 12 volts, and a resistance of 5.4 ohms, on the use of a 7.4 Ah battery that can work for 4.5 hours using a step down so that the current was stable to make the speed stable and did not make robot car components scorched due to voltage jumps. Because robot cars worked autonomously, vision testing was also needed as a sense of motion in robot cars. During 4.5 hours the robot car can plant seeds with a land area of 4.7 hectares (4788 m2).
This research analyses v-bending results using galvanized SGCC (JIS G 3302) sheet steel. The accuracy of the angle and dimensions of the bending results are the significant elements of the bending process that must be achieved. The bending spring-back/spring-go phenomenon has an impact on bending angle accuracy. If proper parameters are chosen, the spring-tub/spring-go angle should be minimized. This study aimed to see how the proposed v-bending process affected the spring-tub/spring-go angle value. An experimental approach was selected in this study. V-die bending opening, V-die punch angle, V-die punch speed, and bending force are all input parameters for the v-bending process. Meanwhile, in this study, galvanized steel with a thickness of 1.2 mm was used. The results of the ANOVA evaluation showed that the v-die punch speed and bending force are two parameters that affect the response of the variable, with a percentage contribution of 31.0% each. The minimum spring-back angle was found in the second sample, while the minimum spring-go angle was found in the fourth sample
Sistem HVAC merupakan sistem pengkondisian udara (heating, ventilating and air conditioning) dimana proses yang terjadi yaitu pemanas, sirkulasi udara dan pendigin. Dari sistem tersebut diperlukan proses pengukuran suhu dan tekanan udara untuk melihat studi parameter pada sistem HVAC. Dengan adanya studi parameter sistem HVAC tersebut maka tujuan penelitian ini adalah merancang sistem elektrikal untuk sensor pengukuran suhu dan tekanan udara pada sistem HVAC berbasis IOT untuk memudahkan melihat nilai pengukuran suhu dan tekanan udara sistem HVAC secara jarak jauh. Batasan penelitian ini hanya pada perancangan dan pembuatan sensor, tidak dengan studi parameter kinerja sistem HVAC. Metode penelitian mencangkup perancangan sistem elektrikal, pembuatan alat, pengujian sistem elektronika, pengujian pengukuran dan pengujian sistem hasil pengukuran berbasis IOT. Dari pengujian tersebut menghasilkan kapasitas tegangan tertinggi ada pada Arduino namu arus tertinggi ada pada esp32 wifi. Dengan pengukuran tersebut menghasilkan nilai resistansi atau tahanan dengan rata-rata 0,87 ohm dan tergolong sistem elektrikal tegangan rendah yang aman dan terdistribusi sistem listrik yang merata. Jadi sistem alat ukur untuk HVAC aman digunakan dengan hasil pengukuran tekanan udara sebesar 11 kPa dengan suhu sebesar 38 derajat Celsius. Peninjauan pengukuran sistem IOT juga berhasil pada website ThingSpeak. Dengan kesimpulan bahwa alat ukur untuk studi parameter sistem HVAC berhasil dengan nilai yang valid. Kata Kunci: Sistem Elektrikal, HVAC, Sensor, Mikrokontroler
MPX5500DP is a sensor designed to measure how much air pressure is traveling in a channel or piping system. The MPX5500DP sensor has an analog output value that can be converted into a digital signal to display data on how much air pressure is being generated. By utilizing the MPX5500DP sensor the purpose of this study is to measure air pressure in HVAC systems with Micro SD data storage and IOT (Internet Of Things) based Web Browsers. The method used in implementing the MPX5500DP sensor is, selecting materials, making tools, installing sensors and testing. The test results obtained from Micro SD storage are the average air pressure value of 15.76 kPa. The IOT test produced an average air pressure of 15.67 kPa. At the time of testing, there were problems where data transmission was very slow so that for 30 minutes the test only received 14 air pressure data that were read on the Web Browser, namely ThingSpeak. However, the IOT test on an air pressure gauge using the MPX 5500DP sensor was successful. The success of the IOT system in monitoring HVAC air pressure can assist in monitoring the HVAC system in multi-storey buildings.
Makalah ini membahas tentang analisis rangka mobil robot untuk penanaman bibit kangkung. Analisis ini meliputi pemilihan material yang digunakan, proses pembebanan, perpindahan, dan tegangan yang dihasilkan. Metode yang digunakan dalam penelitian ini adalah berbasis simulasi menggunakan analisis elemen hingga dengan Autodesk Inventor 2020. Material yang digunakan adalah Baja Galvanis. Hasil penelitian menunjukkan bahwa dengan beban sebesar 261,9 N dan 284,09 N, tegangan maksimum sebesar 38,03 MPa dan perpindahan maksimum sebesar 1,49 mm yang terjadi pada 8 titik struktur. Dari hasil tersebut dapat disimpulkan bahwa rangka struktural yang digunakan untuk mobil robot aman pada faktor keamanan hingga 5,4. Terbukti bahwa tegangan luluh yang terjadi 38,03 MPa lebih kecil dari 207 MPa spesifikasi tegangan luluh material. This paper discusses about the analysis of mobile robot frame for planting water spinach seeds. This analysis includes the selection of the materials used, the loading process, displacement, and the stresses result. The method used in this research is simulation-based using finite element analysis with Autodesk Inventor 2020. The material used is Galvanized Steel. The results showed that with a load of 261.9 N and 284.09 N, the maximum Von misses stress was 38.03 MPa and the maximum displacement was 1.49 mm that occurred at point 8 on structure. From these results, it can be concluded that the structural frame used for mobile robot is safe at a safety factor of up to 5.4. It is proven that the yield stress, of course, that occurs 38.03 MPa less than 207 MPa of material.
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