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Purwarupa Sistem Kendali Kecepatan Mobil Berdasarkan Jarak dengan Sistem Inferensi Fuzzy Tsukamoto Niko Karis Gunawan; Abdul Rouf
IJEIS (Indonesian Journal of Electronics and Instrumentation Systems) Vol 3, No 2 (2013): October
Publisher : IndoCEISS in colaboration with Universitas Gadjah Mada, Indonesia.

AbstrakTelah dibuat purwarupa sistem kendali kecepatan mobil dengan sistem inferensi fuzzy metode Tsukamoto. Penyesuaian kecepatan mobil dirancang dapat secara otomatis bergantung pada jarak aman yang ditentukan dengan mobil di depannya. Sistem inferensi fuzzy metode Tsukamoto menggunakan konsep dasar penalaran monoton, yaitu setiap konsekuen pada aturan yang berbentuk jika-maka harus direpresentasikan dengan suatu himpunan fuzzy dengan fungsi keanggotaan yang monoton. Sistem ini menggunakan Arduino UNO sebagai fuzzy logic controller. Untuk mengukur jarak mobil menggunakan sensor jarak HC-SR04. Untuk mengendalikan laju mobil digunakan Pulse Width Modulation yang mengatur kecepatan motor DC, yang akan menggerakkan mobil. Pengujian dilakukan menggunakan dua buah mobil di lintasan uji lurus sepanjang 2 meter. Mobil alfa sebagai mobil referensi dan mobil beta sebagai mobil yang terotomasi.Sistem kendali kecepatan mobil diuji dalam empat mode simulasi yang menggambarkan kondisi lalu lintas secara umum, yaitu “Approaching”, “Follow”, “Braking”, dan “Combination”. Dari hasil penelitian menunjukkan bahwa mobil beta mampu mengikuti mobil alfa dengan error jarak dari 0 cm sampai -4 cm. Untuk menyesuaikan jarak dengan mobil alfa sesuai dengan set point maka mobil beta akan menyesuaikan kecepatannya yaitu dengan menambah kecepatan saat mobil alfa melaju lebih cepat, mengurangi kecepatan saat mobil alfa melaju lebih lambat dan berhenti saat mobil alfa berhenti. Kata kunci—Kendali, Kecepatan, Mobil, Fuzzy, Tsukamoto Abstract Have been made a prototype of control system with fuzzy inference system Tsukamoto method. Speed adjustment of the car is designed to be automatically depend on specified safe distance. Fuzzy inference system Tsukamoto method uses the basic concept of monotonic reasoning, that every consequent on the IF-THEN rules should be represented by a fuzzy set with monotonous membership function.The system uses an Arduino UNO board as the fuzzy logic controller. To measure the distance using a distance sensor HC-SR0. While to control the car speed using Pulse Width Modulation method that control the speed of a DC motor, which will drive the car. Tests are performed using two cars with 2 meters test track. “Alfa” as the reference car and “Beta” as the automated car.The car speed control system was tested in four simulation modes that describe traffic conditions in general, “Approaching”, “Follow”, “Braking”, and “Combination”. The result of the research shows that car beta can follow car alfa with distance error from 0 cm until -4 cm. To adjust its distance with car alfa, car beta will adjust its speed by increases speed as car alfa goes faster, decreases speed as car alfa goes slower and stops as car alfa stops. Keywords—Control, Speed, Car, Fuzzy, Tsukamoto

Purwarupa kWh Meter Prabayar Berbasis Sensor Network Muhamad Ervan Lutfi; Abdul Rouf
IJEIS (Indonesian Journal of Electronics and Instrumentation Systems) Vol 4, No 2 (2014): October
Publisher : IndoCEISS in colaboration with Universitas Gadjah Mada, Indonesia.

AbstrakPada penelitian ini dilakukan pengembangan teknologi kWh meter prabayar berbasis sensor network”. Sistem ini mengimplementasikan kWh meter prabayar dengan menggunakan sensor network sebagai penghubung antara satu kWh pelanggan dengan kWh pelanggan lainya yang dinilai akan efektif, dan efisien dalam mendistribusikan data pemakaian energi listrik setiap pelanggan, outputnya kemudian di tampilkan di web browser.Dari hasil percobaan dapat diketahui bahwa Sensor Arus dari kedua node client ini memiliki nilai kesalahan pengukuran arus listrik yang dapat disimpulkan bahwa pada sensor arus pada node client pertama lebih kecil nilai kesalahanya dibandingkan dengan node client yang kedua, Sensor Tegangan dari kedua node client ini memiliki nilai kesalahan pengukuran arus listrik yang dapat disimpulkan bahwa pada sensor arus pada node client kedua lebih kecil nilai kesalahanya dibandingkan dengan node client yang pertama, dan sistem perhitungan nilai kWh ini memiliki nilai kesalahan perhitungan pada node client 1 sebesar 0,004444 ± 0,001721 kWh, dan pada node client 2 sebesar 0,00556 ± 0,00443 kWh. Sistem ini berhasil dibuat dengan baik, serta dapat diketahui bahwa data dapat diterima dengan secara dua arah baik dari end device (node client) ke coordinator (node server). Sistem ini juga berhasil menampilkan data pada antarmuka Web Browser.Kata kunci— kWh Meter, Sensor Network, XBee, Web Browser. Abstract A prototype of prepaid kWh meter based on sensor network technology has been developed. The prototype consist of several prepaid kWh meter connected each other. This prototype propose to be efficient, and effective in distributing electric energy consumption data every customer, and then displayed on the web browser.The experimental results it can be seen that the current sensor of both the client node has the value of the electric current measurement errors can be concluded that the current sensor on the first client node is smaller than the value errors second client nodes, voltage sensor of both the client node has a value error of measurement of electric current that can be inferred that the current sensor on both the client node is smaller than the value errors first client node, and the system's calculation of kWh value calculation error on the client node 1 at 0.004444 ± 0.001721 kWh, and on the client node 2 of 0.00556 ± 0.00443 kWh. The system is well made. node that the data can be well-received from the end device (client node) to the coordinator (server node). The system also displays the data on the Web Browser interface successfully.Keywords— kWh Meter, Sensor Network, XBee, Web Browser

Sistem Deteksi Bentuk Kecacatan Benda Padat Menggunakan Teknik Variasi Sudut Ultrasonik Taufiq Nur Syahril Sidiq; Abdul Rouf; Tri Wahyu Supardi
IJEIS (Indonesian Journal of Electronics and Instrumentation Systems) Vol 6, No 1 (2016): April
Publisher : IndoCEISS in colaboration with Universitas Gadjah Mada, Indonesia.

Making solid material frequent problems of internal defect. This research intends to make a system to detect the form of defect in solid materials using ultrasonic waves. Components that was used in the system is a generator function, an op-amp, ultrasonic sensor, oscilloscope and cylindrical solid material The method that used is reflected method of ultrasonic. Ultrasonic waves emitted from the transmitter to a solid material and the receiver will read a results of the reflection that occurs due to differences in medium objects. Oscilloscope will read of ultrasonic. Recitation will be done to determine the form of any cylindrical solid object.The trial system by a unit transmitter emits ultrasonic waves on the side solid material. A solid body rotated every multiple 20˚ of 0-180˚ to get an angle variations. The result obtained that waves as 40 khz can detect the form of solid material defect. The form of defect in a solid material has different wave pattern. Constant wave patterns with small amplitudo is a cylindrical material without defect, constant wave patterns with more much amplitudo is cylindrical material with cylindrical defect also and wave patterns whose amplitudo is different in any variation angle is cylindrical solid with cubicaly defect.

Pengukuran Jarak Lubang Pada Benda Padat Menggunakan Sensor Ultrasonik Ivan Dwicahyo Pratomo; Abdul Rouf; Tri Wahyu Supardi
IJEIS (Indonesian Journal of Electronics and Instrumentation Systems) Vol 6, No 1 (2016): April
Publisher : IndoCEISS in colaboration with Universitas Gadjah Mada, Indonesia.

The process of making solid object in general, not print with good so that holes can’t be seen directly visually. NDT (Non Destructive Testing) is a method for detecting holes and the quality of solid objects without damaging solid object one uses ultrasonic to detect holes a solid object which there are on internal solid object. This research aims to design an instrument for measuring distances holes of solid body using ultrasonic sensor and oscilloscope.The method used for the testing is the echo pulse which produce output of the wave amplitude shown oscilloscope. Function generator as input pulses 40 KHz to circuit amplifier then the transformator strengthened and continued to ultrasonic transmitter. Transmitter generated pulse to object and the pulse has reflection because it has holes an internal object. The reflection pulse is received by the receiver ultrasonic sensor and amplified by signal amplifier circuit, then the wave displayed on oscilloscope. The research showed that the smaller distance holes testing the wave amplitude obtained becomes larger and when the distance holes a solid object is longer the attenuation coefficient value the greater worth. The value of measurement error in using a tool value made author of 5 %.

Rancang Bangun Pembangkit Pulsa Tiga Sensor Ultrasonik Untuk Pendeteksi Kecacatan Beton Berbasis Mikrokontroler Setyo Swasoko; Abdul Rouf
IJEIS (Indonesian Journal of Electronics and Instrumentation Systems) Vol 7, No 2 (2017): October
Publisher : IndoCEISS in colaboration with Universitas Gadjah Mada, Indonesia.

NDT Research conducted to detect any defects on a solid materials. This method is done because not damage the object being tested. Various methods of NDT research also studied, one of which is a multi-transmitter. Multi-transmitter more efficient in scanning objects defective because a more extensive range of sensors. Prioritizing advantages compared with other pulse sources such as AFG, including portable, small radiation, the price relatively cheaper, variety of frequencies that can be generated, and smaller power supplies will be used microcontroller as signal generator.With this concept, generating ultrasonic waves 40kHz emitted by three transmitter input from serial PC to microcontroller and converted into analog signal AD9850 module. Amplitude of the frequency of AD9850 strengthened using LM386, and strengthened again using transfomator ferrite core. And choose sensor, used switches. From research conducted by a few conclusions. Maximum of output voltage AD9850 module is 1.04 V. Maximum output voltage of LM386 is ± 14 V and maximum voltage output of ferrite transformator is ± 170 V. The effective transmitter is SRF04 and maximum input voltage is ± 60 V. Amplitude of wave will be smaller if reflection distance farther, otherwise amplitude increases if the reflection distance is closer.

Perancangan Alat Ukur Massa Jenis Zat Cair Menggunakan Cepat Rambat Gelombang Ultrasonik Nanda Bagus Prawira; Abdul Rouf
IJEIS (Indonesian Journal of Electronics and Instrumentation Systems) Vol 8, No 2 (2018): October
Publisher : IndoCEISS in colaboration with Universitas Gadjah Mada, Indonesia.

Density is a measure of the mass of volume unity. How to measure density in general by measuring the weight and dividing it by the volume of liquid, so in this way the measurement is not. Measurement of the density of the liquid based on the ultrasonic velocity becomes an alternative so that the measurement can be done directly, accurately, practically, and easily.Ultrasonic velocity becomes the variable to determine the density of the liquid. Time synchronization begins when the ultrasonic transmitter emits ultrasonic and is terminated when the receiver receives ultrasonic. The discrete ultrasonic wave transmission method is performed when the ultrasonic receiver receives transmittance from the ultrasonic transmitter then the 40KHz signal pulse is stopped and ultrasonic transmission is repeated up to 10 times the measurement data.From this study obtained some conclusions. Ultrasonic velocity is influenced by the viscosity of the liquid, ultrasonic velocity through 1394m / s aquades, ultrasonic velocity through cooking oil 1387m / s, ultrasonic velocity through liquid soap 1175m / s, ultrasonic velocity through liquid soap solution 40% 1317m / s , Ultrasonic velocity through liquid soap solution 70% 1257m / s, velocity measurement deviation of 0.43% and 0.01% density calculation type.

Analisis Hubungan Kecepatan Gelombang Dengan Kuat Tekan Beton Menggunakan Metode UPV Anggia Eta Rizkiasari; Abdul Rouf
IJEIS (Indonesian Journal of Electronics and Instrumentation Systems) Vol 10, No 1 (2020): April
Publisher : IndoCEISS in colaboration with Universitas Gadjah Mada, Indonesia.

Until now the use of concrete as a building material is still widely used for building structures. It is important to do concrete compressive strength testing as one of the factors to know the quality of a concrete. NDT (Non-Destructive Testing) is a method of solid quality testing without damaging the object. Testing with the NDT method is considered more efficient than the destructive test method. One method for performing NDT testing is by utilizing UPV (Ultrasonic Pulse Velocity).UPV is a method for estimating concrete compressive strength based on the ultrasonic pulse velocity relationship through concrete with the concrete compressive strength itself. UPV testing works by emitting ultrasonic pulses of 40 kHz through concrete to obtain the travel time of the pulse. Then the resulting time will be calculated the value of its speed and then will be converted into concrete compressive strength.Concrete compressive strength measurement system for high-quality concrete using UPV method can be designed by utilizing relation between ultrasonic pulse velocity with concrete compressive strength. Based on the test results, the average error value of concrete compressive strength testing is 3.04% with a maximum error of 6.63%.

Klasifikasi Tingkat Kemurnian Bahan Bakar Minyak Berdasarkan Cepat Rambat Gelombang Menggunakan Algoritma K-Nearest Neighbor Rangga Pujianto Wijaya; Abdul Rouf; Tri Wahyu Supardi
IJEIS (Indonesian Journal of Electronics and Instrumentation Systems) Vol 9, No 2 (2019): October
Publisher : IndoCEISS in colaboration with Universitas Gadjah Mada, Indonesia.

The need for fuel oil has increased along with the increase of population, the number of vehicles and industries. An increase in demand for fuel oil is used by some people to make a profit by selling mixed fuel oil at the same price as the price set by the government. The purpose of this study is to create a prototype device that can characterize the type of fuel oil and create a classification system to determine the level of fuel purity with 40 kHz ultrasonic waves based on the parameters of wave velocity using the K-Nearest Neighbor (KNN) algorithm.This device works by using a 40 kHz ultrasonic wave that is connected to an ultrasonic transmitter. The propagated wave will be received by the ultrasonic receiver. The wave received by the receiver will be amplified and connected to the comparator circuit so that it can be processed by a microcontroller. Data obtained using this tool are wave travel time, wave velocity, density, and attenuation. The data used for classification systems using the KNN algorithm is wave velocity.Classification using the KNN algorithm can identify the level of fuel purity based on the parameters of the wave velocity obtained from ultrasonic wave gauges with an accuracy of 72.50%. Wave velocity which is measured using ultrasonic waves is directly proportional to the actual speed with the largest percentage of deviations that is 0.34%.

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