Fluid Behaviour Analysis on Liquefaction Using Korinofaction Device

Earthquakes can be followed by liquefaction, which is a response of saturated soil when it is subjected to shock or stress that cause loss of soil strength or bearing capacity as an impact of the increasing of soil pore water and the loss of the soil stress’s effectiveness. This research using Korinofaction that work to cause cyclic loads or vibrations that come from DC servo motor with an adjustable speed and force. The earthquake’s strength is measured by the number of rpm measured on the digital tachometer. Korinofaction is equipped with plumbing system to observe fluid behaviour during liquefaction. The results of research showed that silty sand and silt was liquefied in VIII Modified Mercalli Intensity earthquake and cause the occurrence of water flow on the surface due to increase soil pore stress. The flow rate that triggers liquefaction in the silty sand is 6,769 × 10-5 m 3/ second ’ and silt is 5,0 × 10-5 m 3/ second . The water flow that flows in the silty sand had permeability of 4,76 × 10-4 Cm/second while on the silt is 6,09 × 10-4 Cm/second . After liquefaction, gradient hydraulic of silty sand is 4,76 mm and silt is 6,09 mm. Based on this research liquefaction caused mobilized debris flow and muddy debris flow.

Contactless digital tachometer using microcontroller

Tachometer is a device that used for counting or for the measuring purpose of the number of revolutions (that is the total number rotations made by the device in unit of measuring time) of an object in unit time. It is expressed in the unit of RPS or RPM, the model uses a set of infrared transducer receiver to count the RPM pulses, and the Arduino microcontroller is used for the implementation of the project. The individual pulses are counted by the microcontroller to give the final output of the RPM.

RANCANG BANGUN TACHOMETER DIGITAL BERBASIS ARDUINO DILENGKAPI CHARGING DAN MODE PENYIMPAN DATA

A good and feasible centrifuge is needed in the world of health, therefore a digital tachometer is needed to calibrate a centrifuge. Digital tachometer is a measuring instrument used to measure the rotation speed of a motor. This tachometer will be tested to function by being compared to using Digital Laser Photo Tachometer. This tachometer will display the number of rotations per minute of a motor according to the speed setting on the centrifuge using the output of this E18-D80NK sensor which will later be processed by the Arduino Nano. As for this feature charger and data storage mode, so that user can save the data of measurement results on SD Card, and beside that user can also be a way of charging when after usage or before usage. At testing the tool used point settings 1000, 2000, 3000, 4000, 5000, and 12000 RPM. Based on the measurement results of centrifuge using tachometer module and comparison tachometer have average percentage of error varying at each setting point. The smallest error 0.8% at the setting Point 3000 RPM, while the largest error 4.9% at the setting point 1000 RPM. The Tacometer error value on this Centrifuge measurement is still within the tolerance limit of ± 10%

RANCANG BANGUN PENANDA KECEPATAN SEPEDA MOTOR LISTRIK BERBASIS OPTICAL SENSOR

Meningkatnya jumlah kendaraan mengakibatkan kapasitas jalan menjadi tidak memadai lagi, dimanadampak dari peningkatan jumlah kendaraan ini mengakibatkan meningkatnya angka kecelakaanyang disebabkan oleh lalainya pengendara, yang setiap tahunnya terus bertambah. seringkalipengendara lupa akan kecepatan kendaraan yang mengakibatkan peluang kecelakaan menjadi besar.Oleh karena itu pada tugas akhir ini dibuatlah suatu alat yang dapat menandakan kecepatan apabilapengendara lupa akan kecepatan kendaraan, alat ini akan memberitahukan pengendara dalamkecepatan tertentu. Alat ini dibuat dengan memanfaatkan Optical Sensor yang digunakan untukmembaca kecepatan kendaraan dan diproses oleh mikrokontroler yang kemudian akanmemerintahkan LED, relay dan buzzer untuk memberitahukan kepada pengendara akan kecepatanpengendara berdasarkan pembacaan pada rotor. Rotor terdiri dari 18 lubang dengan ukuran lubangsetiap 20º, dan dalam satu meter terdapat 0,69 putaran roda dengan diameter roda 46 cm, denganselisih pembacaan lebih besar Digital tachometer di banding optical sensor yaitu 2,87 RPM.

PENGEMBANGAN ALTERNATOR GANESHA ELECTRIC VEHICLES 1.0 GENERASI I

Penelitian ini bertujuan untuk (1) Bagaimana rancangan alternator pada rangkaian kelistrikan Ganesha Electric Vehicles 1.0 Generasi I (2) Berapakah tegangan alternator yang dihasilkan kendaraan Ganesha Electric Vehicles 1.0 Generasi I. Metode Penelitian dan Pengembangan (Research and Development) adalah metode penelitian yang digunakan untuk menghasilkan produk tertentu, dan menguji keefektifan produk tersebut dimana suatu proses atau langkah-langkah untuk mengembangkan suatu produk baru, atau menyempurnakan produk yang telah ada, yang dapat dipertanggungjawabkan. Dalam penelitian ini yang menjadi subjek penelitian adalah Ganesha Electric Vechiles 1.0 Generasi I. Data dalam penelitian ini dikumpulkan dengan melakukan beberapa pengujian dengan menggunakan tachometer digital untuk mendapatkan rpm , setelah data rpm didapat kemudian dilakukan proses pengukuran dengan menggunakan ampere meter dan apometer digital. Jadi hasil dari pengukuran menggunakan sudut primary pulley 14 ͦ dengan menggunakan perbandingan roller 12 gram didapatkan tegangan pengisian 4.9 volt, tegangan lampu 3.6 volt, amper pengisian dan ampere lampu didapatkan 2 amper pada 4500 rpm. Maka dapat disimpulkan bahwa semakin berat roller yang digunakan semakin meningkat pula tegangan yang dihasilkan pada setiap peningkatan rmp sepeda motor. Kata Kunci : Alternator, Ganesha Electric Vehicles 1.0 dan Tegangan This study aimed to (1) How to design the alternator on the electrical circuit Ganesha Electric Vehicles 1.0 Generation I (2) What is the alternator voltage generated Ganesha vehicle Electric Vehicles 1.0 Generation I. Method used in this reseach was Research and Development. Research and Development is a research method that is used to produce a particular product, and test the effectiveness of these products in which a process or steps to develop a new product, or enhance existing products, which can be accounted for. In this study, the research subject was Ganesha Electric vechiles 1.0 Generation I. The data of this study were collected by doing some testing using a digital tachometer to get rpm, after the rpm data obtained and then do the measurement process by using digital ampere meter and apometer. The result of the measurement using the angle of the primary pulley 14 ͦ using comparative roller 12 gram obtained 4.9 volt charging voltage, lamp voltage 3.6 volt, ampere charging and ampere charging lamp obtained 2 amperes at 4500 rpm. It can be concluded that the heavy roller is used also increase the voltage generated on any increase in rpm motorcycle. keyword : Alternator, Ganesha Electric Vehicles 1.0 and Voltage

PENGARUH SUDUT PRIMARY PULLEY DAN VARIASI BERAT ROLLER TERHADAP TORQUE DAN RPM PADA MOTOR GANESHA ELECTRIC VEHICLES 1.0 BASE CONTINOUS VARIABLE TRANSMISION (CVT)

Penelitian ini Penelitian ini bertujuan untuk (1) Untuk mengetahui pengaruh Torque pada Motor Ganesha Electric Vehicles 1.0 Base Continous Variable Transmision (CVT) dengan memodifikasi Sudut Primary Pulley 13,5° Dan Variasi Berat Roller. (2) Untuk mengetahui pengaruh Rpm Pada Motor Ganesha Electric Vehicles 1.0 Base Continous Variable Transmision (CVT) dengan memodifikasi Sudut Primary Pulley 13,5° Dan Variasi Berat Roller. Metode Penelitian Eksperimen adalah metode penelitian yang digunakan untuk mendefinisikan eksperimen sebagai suatu cara mencari hubungan sebab akibat. Dalam penelitian ini yang menjadi subjek penelitian adalah sepeda motor Yamaha Nouvo tahun 2002 dan motor listrik DC 130 volt 30 ampere. Data dalam penelitian ini dikumpulkan dengan melakukan uji coba langsung dengan menggunakan tachometer digital untuk mendapatkan rpm tertinggi , setelah data rpm didapat kemudian dimasukan ke rumus untuk mencari torque tertinngi. Jadi hasil dari pengukuran menggunakan tachometer digital dan perhitungan, sudut primary pulley 13,5° dengan variasi berat roller 10/12 gram mendapatkan rpm tertinggi sebesar 5.396 rpm dan torque tertinggi sebesar 4,583 lb-ft pada roller 12 gram. Sedangkan sudut primary pulley standar 14° dengan variasi berat roller 11/12 gram mendapatkan rpm tertinggi sebesar 4.673 rpm dan Torque tertinggi sebesar 4,637 lb-ft pada roller 12 gram. Maka kesimpulannya, semakin tinggi putaran mesin (rpm), torque akan semakin rendah pada saat motor dalam rpm maximal dan tanpa beban. Kata Kunci : Ganesha Electric Vehicles, Primary Pulley, Roller, Rpm Torque. This study aims at (1) Determining the effect of Torque on Ganesha Electric Vehicles1.0 Base Continous Variable Transmission (CVT) by modifying 13,5° of Primary Pulley angel and Roller Weight Variations. (2) Determining the effect of Rpm on Ganesha Electric Vehicles 1.0 Base Continous Variable Transmission (CVT) by by modifying 13,5° of Primary Pulley angel and Roller Weight Variations. Experimental research was uesd as the method of this research in which it defines how an experimental used as a way to find a causal relationship. The subjects of this study areYamaha Nouvo 2002 motorcycle and an electric motor with Dc 130 volt 30 Ampere. The data were collected by administering a direct test using a digital thacometer to get the highest Rpm continued by calculating the obtained data based on the formula to find the highest Torque. From the measurement and calculation done by using a digital tachometer, it was found that the Primary Pulley angle of 13,5° with Roller Weight variations 10/12 gram gains the highest rpm at 5.396 Rpm and the highest Torque at 4,583 lb-ft at 12 gram of Roller. Meanwhile, the angel of standard primary pulley 14° with roller weight variations 11/12 gram obtains the highest rpm at 4.673 Rpm and the highest Torque at 4,637 lb-ft on a Roller 12 gram. In conclusion, the higher Torque when the motorcycle is in the maximum rpm and carefree condition. keyword : Ganesha Electric Vehicles, Primary Pulley, Roller, Rpm, Torque.