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Leak Detection Modeling and Simulation for Oil Pipeline with Artificial Intelligence Method Sukarno, Pudjo; Sidarto, Kuntjoro Adji; Trisnobudi, Amoranto; Setyoadi, Delint Ira; Rohani, Nancy; Darmadi, Darmadi
Journal of Engineering and Technological Sciences Vol 39, No 1 (2007)
Publisher : ITB Journal Publisher, LPPM ITB

Leak detection is always interesting research topic, where leak location and leak rate are two pipeline leaking parameters that should be determined accurately to overcome pipe leaking problems. In this research those two parameters are investigated by developing transmission pipeline model and the leak detection model which is developed using Artificial Neural Network. The mathematical approach needs actual leak data to train the leak detection model, however such data could not be obtained from oil fields. Therefore, for training purposes hypothetical data are developed using the transmission pipeline model, by applying various physical configuration of pipeline and applying oil properties correlations to estimate the value of oil density and viscosity. The various leak locations and leak rates are also represented in this model. The prediction of those two leak parameters will be completed until the total error is less than certain value of tolerance, or until iterations level is reached. To recognize the pattern, forward procedure is conducted. The application of this approach produces conclusion that for certain pipeline network configuration, the higher number of iterations will produce accurate result. The number of iterations depend on the leakage rate, the smaller leakage rate, the higher number of iterations are required. The accuracy of this approach is clearly determined by the quality of training data. Therefore, in the preparation of training data the results of pressure drop calculations should be validated by the real measurement of pressure drop along the pipeline. For the accuracy purposes, there are possibility to change the pressure drop and fluid properties correlations, to get the better results. The results of this research are expected to give real contribution for giving an early detection of oil-spill in oil fields.

ANALISIS FREKUENSI PADA UJI TAK MERUSAK ULTRASONIK Trisnobudi, Amoranto
Mesin Vol 20, No 2 (2005)
Publisher : Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1148.762 KB)

In ultrasonic nondestructive testing an ultrasonic wave is usually radiated through a material by a transducer. If there is a flaw inside the material, reflected or diffracted waves caused by the interaction between the ultrasonic wave and the flaw, are received by the same or another transducer. The received signals must be processed in order to obtain information about the flaw characteristics. For the flaw which perpendicular to the beam wave, the flaw size can be determined by amplitude analysis, for example by using DGS (Distance Gain Scale) diagram. The oblique flaw can be characterized by time analysis such as Time of Flight Diffraction (TOFD) method. But if the flaw is small or there is a large enough noise, frequency analysis must be used. This paper deals with the two methods using frequency analysis, i.e. ultrasonic spectroscopy and split spectrum processing, to overcome the above problems.

METODA ULTRASONIK UNTUK MENENTUKAN ARAH KRISTAL TUNGGAL BERSTRUKTUR KUBIK Trisnobudi, Amoranto; Sugiharto, Benny
Mesin Vol 15, No 2 (2000)
Publisher : Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (441.843 KB)

Single crystal direction can be determined by x-ray diffraction. The determination of this crystal direction can also be carried out by using ultrasonic method. In this method the ultrasonic wave velocity propagating through the crystal is measured. From this velocity measurement then the crystal direction can be determined. This paper deals with the results of a research about the direction determination of cubic single crystal using ultrasonic wave. There are two methods used, namely graphical method and computer method. These two methods used the same data, i.e. velocity data for all possible direction that has been calculated based on the wave and elasticity theory. In the ï¬rst method, the data are stored as several graphics whereas in the second method they are stored as database in a computer program. These two methods have shown the same results in aluminum for crystal directions [311], [331], [661], [631] and [611] where the computer method can be carried out quicker than the graphical method.

The Measurement of Sucrose Content of Sugar Cane Using Ultrasonic Waves Amoranto Trisnobudi; Tjia Liong Hoei; Enung Rosihan Nugraha
Jurnal Teknologi dan Industri Pangan Vol. 12 No. 1 (2001): Jurnal Teknologi dan Industri Pangan
Publisher : Departemen Ilmu dan Teknologi Pangan, IPB Indonesia bekerjasama dengan PATPI

Show Abstract | Download Original | Original Source | Check in Google Scholar

The measurement of sucrose content of sugar cane is usually carried out by using polarimeter and Brix Wager scale. These two apparatus are operated manually so that the accuracy of the measurement results is depended on the operator skill. To overcome this problem we have developed an alternative method that can measure the sucrose content more quickly and accurately than the conventional methods. This new method was carried out by using ultrasonic waves whose velocity depends on the sucrose content. Firstly, the electronic apparatus used was calibrated with 37 samples of sugar cane with various sucrose content from 4.46 % to 7.29 %. The result of this calibration was an empirical equation between the ultrasonic wave velocity V and the sucrose content R, i.e. R = 2.65 V2 - 11,95 V + 17,65 where R in % and V in km/s. Then this equation was stored as database in a computer program that will be used to calculate the sucrose content. Finally, this sucrose content measurement system was tested by using 30 samples of sugar cane. The maximum error of the measurement result was 6.4 %.

Pengukuran Kecepatan dan Amplitudo Gelombang Ultrasonik untuk Klasifikasi Kualitas Batubara Hadi Hadi; Amoranto Trisnobudi; Frinsyah Virgo; Deddy Kurniadi
Jurnal Penelitian Sains Vol 13, No 1 (2010)
Publisher : Faculty of Mathtmatics and Natural Sciences

Umumnya, untuk menentukan kualitas batubara dilakukan analisa kimia, misalnya menggunakan analisis proksimat dan ultimat. Selama ini pengujian kualitas batubara dilakukan di laboratorium. Pengujian ini memakan waktu yang cukup lama untuk mengetahui kualitas batubara tersebut. Untuk mengetahui kualitas batubara dapat dilakukan dengan mengukur sifat akustik gelombang ultrasonik yang menembus batubara. Pada pengukuran sifat akustik batubara dengan uji ultrasonik, telah dilakukan dengan pengukuran untuk masing-masing sampel. Dari hasil penelitian, rentang kecepatan gelombang ultrasonik untuk semua sampel batubara adalah antara 787 - 3335 m/s. Jadi, pengukuran parameter fisika batubara telah dapat dilakukan dengan metode ultrasonik, khususnya untuk jenis antrasit. Untuk jenis bituminus dan subbituminus tidak dapat diukur dengan baik.

Leak Detection Modeling and Simulation for Oil Pipeline with Artificial Intelligence Method Pudjo Sukarno; Kuntjoro Adji Sidarto; Amoranto Trisnobudi; Delint Ira Setyoadi; Nancy Rohani; Darmadi Darmadi
Journal of Engineering and Technological Sciences Vol. 39 No. 1 (2007)
Publisher : Institute for Research and Community Services, Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/itbj.eng.sci.2007.39.1.1

Leak detection is always interesting research topic, where leak location and leak rate are two pipeline leaking parameters that should be determined accurately to overcome pipe leaking problems. In this research those two parameters are investigated by developing transmission pipeline model and the leak detection model which is developed using Artificial Neural Network. The mathematical approach needs actual leak data to train the leak detection model, however such data could not be obtained from oil fields. Therefore, for training purposes hypothetical data are developed using the transmission pipeline model, by applying various physical configuration of pipeline and applying oil properties correlations to estimate the value of oil density and viscosity. The various leak locations and leak rates are also represented in this model. The prediction of those two leak parameters will be completed until the total error is less than certain value of tolerance, or until iterations level is reached. To recognize the pattern, forward procedure is conducted. The application of this approach produces conclusion that for certain pipeline network configuration, the higher number of iterations will produce accurate result. The number of iterations depend on the leakage rate, the smaller leakage rate, the higher number of iterations are required. The accuracy of this approach is clearly determined by the quality of training data. Therefore, in the preparation of training data the results of pressure drop calculations should be validated by the real measurement of pressure drop along the pipeline. For the accuracy purposes, there are possibility to change the pressure drop and fluid properties correlations, to get the better results. The results of this research are expected to give real contribution for giving an early detection of oil-spill in oil fields.

The Influence of Position of Durian in Determination of Ripeness of Durian Non-Destrucyively by Ultrasonic Wave Bambang Haryanto; I Wayan Budiastra; Amoranto Trisnobudi
Jurnal Keteknikan Pertanian Vol. 14 No. 1 (2000): Buletin Keteknikan Pertanian
Publisher : PERTETA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19028/jtep.014.1.%p

The study was conducted to assess the influence of durian 's position toward transmission properties of ultrasonic wave for determination of the fruit ripeness using non-destructiive technique. Three ripe and unripe durian were used to assess transmittance wave that was passed the durian. The measurement was conducted at 3 peak and valley positions and it was repeated 20 times. The result showed that position durian 's inJluenccad thetransmissions of ultrasonic wave. Mo mzJ a (attenuation) values can be used as indicator for durian ripeness. Ripe durian tends to have highera value than unripe durian.

METODA ULTRASONIK UNTUK MENENTUKAN ARAH KRISTAL TUNGGAL BERSTRUKTUR KUBIK Amoranto Trisnobudi; Benny Sugiharto
Mesin Vol. 15 No. 2 (2000)
Publisher : Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar

Single crystal direction can be determined by x-ray diffraction. The determination of this crystal direction can also be carried out by using ultrasonic method. In this method the ultrasonic wave velocity propagating through the crystal is measured. From this velocity measurement then the crystal direction can be determined. This paper deals with the results of a research about the direction determination of cubic single crystal using ultrasonic wave. There are two methods used, namely graphical method and computer method. These two methods used the same data, i.e. velocity data for all possible direction that has been calculated based on the wave and elasticity theory. In the ï¬rst method, the data are stored as several graphics whereas in the second method they are stored as database in a computer program. These two methods have shown the same results in aluminum for crystal directions [311], [331], [661], [631] and [611] where the computer method can be carried out quicker than the graphical method.

ANALISIS FREKUENSI PADA UJI TAK MERUSAK ULTRASONIK Amoranto Trisnobudi
Mesin Vol. 20 No. 2 (2005)
Publisher : Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar

In ultrasonic nondestructive testing an ultrasonic wave is usually radiated through a material by a transducer. If there is a flaw inside the material, reflected or diffracted waves caused by the interaction between the ultrasonic wave and the flaw, are received by the same or another transducer. The received signals must be processed in order to obtain information about the flaw characteristics. For the flaw which perpendicular to the beam wave, the flaw size can be determined by amplitude analysis, for example by using DGS (Distance Gain Scale) diagram. The oblique flaw can be characterized by time analysis such as Time of Flight Diffraction (TOFD) method. But if the flaw is small or there is a large enough noise, frequency analysis must be used. This paper deals with the two methods using frequency analysis, i.e. ultrasonic spectroscopy and split spectrum processing, to overcome the above problems.

Pengukuran Aliran Udara Dalam Pipa Menggunakan Gelombang Ultrasonik Dengan Metoda Korelasi Silang Deddy Kurniadi; B Suwandhika; Amoranto Trisnobudi
Jurnal Otomasi Kontrol dan Instrumentasi Vol 1 No 1 (2009): Jurnal Otomasi Kontrol dan Instrumentasi
Publisher : Pusat Teknologi Instrumentasi dan Otomasi (PTIO) - Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/joki.2009.1.1.5

Flowmeter ultrasonik merupakan jenis flowmeter yang memanfaatkan gelombang ultrasonik dalam pengukurannya. Metoda yang umum digunakan adalah metoda waktu tempuh. Metoda ini memiliki prinsip pengukuran yang relatif mudah dibanding dengan metoda lainnya. Namun metoda ini kurang sesuai jika digunakan pada aliran fluida yang tidak laminar. Metoda korelasi silang dengan gelombang ultrasonik dapat digunakan untuk mengukur laju aliran fluida yang relatif bersih tetapi profil aliran yang tidak laminar.Pada makalah ini dibahas suatu studi eksperimen metoda korelasi silang untuk mengukur kecepatan aliran udara dalam suatu pipa. Dari hasil pengukuran dengan metoda waktu tempuh diperoleh kecepatan rata-rata aliran yang berbeda dengan yang diperoleh pada metoda korelasi silang. Hasil pengukuran metoda korelasi silang menunjukkan standar deviasi dan presisi yang relatif tinggi, Hal ini menunjukkan bahwa metoda korelasi silang memberikan hasil yang lebih baik pada kondisi aliran tidak laminar seperti aliran udara dalam pipa. Keywords : gelombang ultrasonik, metoda korelasi silang, waktu tunda, demodulasi, aliran turbulen

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