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Transmisi: Jurnal Ilmiah Teknik Elektro

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Published by Universitas Diponegoro

ISSN : - EISSN : 24076422 DOI : -

Core Subject : Education,

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Articles 8 Documents

Search results for , issue "Vol 11, No 2 (2009): TRANSMISI" : 8 Documents clear

RANCANG BANGUN MOTOR INDUKSI SEBAGAI GENERATOR (MISG) PADA PEMBANGKIT LISTRIK TENAGA MIKROHIDRO Effendy, Machmud
Transmisi Vol 11, No 2 (2009): TRANSMISI
Publisher : Departemen Teknik Elektro, Universitas Diponegoro

Induction Motor As Generator (IMAG) is an induction motor operated as a generator. IMAG widely applied in micro-hydro power plant (MHPP) with a power of less than 10kW. IMAG has many advantages such as: low price, easier maintenance, and widely available in the market. One of weakness IMAG is output voltage is affected by the load. In this research, we use induction motor 1 phase, 1 HP. In order to function as generator, it takes a capacitor 22 uF. IGC (Induction Generator Controller) is used to stabilize output voltage IMAG result of changes in load. IGC uses voltage censor to detect the change of consumer load. Voltage censor proceses linerarity level to the change of output voltage IMAG which equals to R2=0.995. The use of IGC causes the IMAG voltage is approximately 220.9 V to 224.7V and the IMAG frequency is 49.1 Hz to 50.5 Hz. Keywords: IGC, IMAG, microhydro

PENGUJIAN TAN Î´ PADA KABEL TEGANGAN MENENGAH Syakur, Abdul; Susilowati, Galuh; AK, Satyagraha; Siregar, A. Parlindungan
Transmisi Vol 11, No 2 (2009): TRANSMISI
Publisher : Departemen Teknik Elektro, Universitas Diponegoro

High voltage testing have purpose to investigate the electrical properties of dielectric related with isolation quality of power equipment during pre-installed or in operation time to prevent equipment losses. Isolation quality is important rule to determine electrical equipment quality, especially for power transmission and distribution. Cable, one of this electrical equipment will be investigated in this research using the high voltage testing with the tan Î´ method. We use the high voltage laboratory of PT. PLN (Persero) Pusat Penelitian dan Pengembangan Ketenagalistrikan, Jakarta, for that kind of testing. There are 6 different middle voltage cable types under the test, as the result the measured tan Î´ values not extend the maximum value, as IEC 60502-2 (2005-2) standard, 40 (x10-4), for each cable. According to that measurement, all of six cable types passed the tan Î´ test. Keywords: tan Î´ testing, cable, isolation quality

PEMETAAN POSISI DAN ORIENTASI KURSI RODA CERDAS BERBASIS PRINSIP DEAD RECKONING Setiawan, Iwan; Akrom, Isnan Fauzan; Darjat, Darjat
Transmisi Vol 11, No 2 (2009): TRANSMISI
Publisher : Departemen Teknik Elektro, Universitas Diponegoro

Smart wheelchairs is a kind of assistive technology implementation from mobile robot field. The main purpose of the system is enhance disable people mobility and guaranteeing safety aspect while wheelchair navigate around domestic environment. As a kind of semi autonomous smart navigation system, the smart wheelchair must be accommodate share control between automatic controller and the user (via joystic). The ultimate goal of this research is to know exactly the position and orientation of smart wheelchair using dead reckoning principle. To fulfill the goal, the smart wheelchair is equipt by quadrature rotary encoder for each wheels.From the experiments that we drawn, we have get some result: Position and orientation error will be larger for long duration of operation of wheelchairs. Fundamentally, these kinds of error result from systematic and non systematic error source. Keywords: encoder, dead reckoning, state chart, komunikasi serial, smart wheelchair

PURWARUPA ALAT PENGHITUNG KERTAS DAN HARGA JASA PEMAKAIAN MESIN FOTOKOPI BERBASIS MIKROKONTROLER AT89S51 Mulyadi, Mulyadi; Sutikno, Tole; Iswanjono, Iswanjono
Transmisi Vol 11, No 2 (2009): TRANSMISI
Publisher : Departemen Teknik Elektro, Universitas Diponegoro

This paper describe the single chip mode prototype of automatic paper and price counting tool in old type photocopying machine based on AT89S51 microcontroller. The experiment showed the prototype had been design could count how many paper out from photocopying machine and then calculate its price. The number of the paper and calculation result in rupiahs was displayed at LCD screen. This prototype have the ability to count one paper per second and 100% price calculation accuracy.Keywords: microcontroller, AT89S51, paper counting tool, photocopying machinePermalink: http://ejournal.undip.ac.id/index.php/transmisi/article/view/2762

PENAKAR CURAH HUJAN AUTOMATIS MENGGUNAKAN MIKROKONTROLER ATMEGA 32 Sumardi, Sumardi
Transmisi Vol 11, No 2 (2009): TRANSMISI
Publisher : Departemen Teknik Elektro, Universitas Diponegoro

Indonesia is one kind of country which has wet tropical climate (humid tropic). The character has always high volume of rains. The average for each year in Indonesia isnâ€™t in the same portion. But there still much more, an average 2000â€“3000 mm/year. And also between one and the other places have different rain rates. Areas which have rain rate less than 1000 mm, coverage of 0,6% from Indonesian territory, There are South east of Nusa, and 2 areas in Sulawesi (Palu valley and Luwuk). And some areas which have rain rates between 1000 â€“ 2000 mm in a year there are some part of South east of Nusa, a little part of Merauke, Aru Archipelago and Tanibar. The areas which have rain rates between 2000 â€“ 3000 mm per year, coverage East Sumatra, South Kalimantan, East part of West Java and Central Java, and some part of Irian Jaya, maluku Archipelago and some of Sulawesi. The area which has the most portion of rain 3000 mm per year is high land of West Sumatra, Central Kalimantan, and central plateau of Papua, more areas in Java, Bali, Lombok, and Sumba. Since this conditions, needed to improve a tools to detect total of rain rate prototype, so rain rate data in one place could be known quickly. This is so meanly to give advantage, for example to anticipate or warn from flood disaster or even landslide. In this research designed hardware to detect rain rate automatically using tipping bucket rain rate sensor. This sensor employed based on signal pulse caused of tipping moving from the rain which called click. Once click produce one pulse feed up to microcontroller to be recorded. Once click shows the number of flow rains 5,5 mm. Total flow rains recorded and accumulated from 06.00 until 17.00 and from 17.00 until 06.00. This result saved in its memory to an exact time suitable with memory capacity which still available in microcontroller. Keywords: rain rate detector, tipping bucket

IMPLEMENTASI SENSOR LEVEL UNTUK ALAT UKUR VOLUME CAIRAN SERBA GUNA DI LINGKUNGAN INDUSTRI Sumardi, Sumardi
Transmisi Vol 11, No 2 (2009): TRANSMISI
Publisher : Departemen Teknik Elektro, Universitas Diponegoro

Nowadays technology development has influence in our daily life, in all aspects, especially in industry. In industry the need of good control system could support the operational and increase the production efficiency. For example industrial automation for filling and releasing the liquid to or from the tank. There is a problem we donâ€™t know the liquid in the tank is full or empty, say someone must look inside the tank or measure the liquid volume manually. This is not so practical according to time inefficiency and inaccurate manual measurement, cause decreasing performance of the next process. In this research we develop a measurement device, a prototype of automatic liquid volume meter based on microcontroller using PING ultrasonic sensor. By design this is more accurate than manual. This device has ability to measure the different liquid tank as long as it is a cylinder tank type. The measuring step is , first, measuring the liquid level and then calculating the liquid volume based on cylinder volume formula. Finally the result (the liquid volume) can be read in the small 2-rows monitor or LCD (Liquid Crystal Display). Keywords: liquid volume meter, ultrasonic sensor PING, level sensor, microcontroller

WAHANA SISTEM KENDALI TERSEBAR DALAM JARINGAN SENSOR NIRKABEL ARSITEKTUR TITIK TUNGGAL Ontowirjo, Abdul Haris Junus
Transmisi Vol 11, No 2 (2009): TRANSMISI
Publisher : Departemen Teknik Elektro, Universitas Diponegoro

In this paper described a simple model of control system include with time delay according to communication network. Time delay in wireless sensor network also explained. As an embedded system, each sensor point in wireless sensor network have operating system with schedulling strategy and certain programming paradigm also communication system with protocol. This two aspects had been analyzed according its contribution to time delay. Hardware implementation was designed and related with time delay characteristic and model. The hardware design using single point architecture could be possibly as starting point for developing distributed control strategies in wireless sensor network. Keywords: wireless sensor network, time delay, distributed control, sensor point, actuator point

IDENTIFIKASI KEBERADAAN KANKER PADA CITRA MAMMOGRAFI MENGGUNAKAN METODE WAVELET HAAR Dane Kurnia Putra; Imam Santoso; Ajub Ajulian Zahra
Transmisi: Jurnal Ilmiah Teknik Elektro Vol 11, No 2 (2009): TRANSMISI
Publisher : Departemen Teknik Elektro, Universitas Diponegoro

Breast cancer is the most common kind of cancer suffered by women. Mammography has been a common method for early detection of breast cancer. Recently mammograms are examined manually, so it demands good knowledge, intuition, and experience in this particular field. In many cases the breast normal tissue can hide malignant so that it can’t b seen on the mammogram. With image processing tissue into mammogram image can be effored to know location. Much methode are used in digital image processing. Methode is used in this final task is texture analysis. Based on that methode, this simulation program is made for identification tissue into mammogram image using wavelet Haar methode. Data about mammogram image any 42 image are get from Telogorejo Hospital Semarang. This program simulation is started with reading image processing and then continued to ROI (region of interest) process, in image from ROI used image enhancement quality with median filter to strech the contrast, after that texture analysis is used to get coefficient from that image. The classification is started with the decomposition process to obtain the wavelet coefficients which then counted the energy and entropy values of each images and then incorporated to database. The next process is comparing the energy and entropy between images which will be classified with the images on the database. The final step is to find Euclidean distance to show that the tested images is one of the class on the database. From the 42 sample observed, the testing result image after ROI and enhancement show that it has recognition rate 86% and testing result without image enhancement show recognition rate at 50%. The observed with using image enhancement ang wavelet Haar from 14 normally image, 13 image can identified, from 20 masses image, 15 can identified, from 8 microclasification image, 7 can identified. The observed without image enhancement and wavelet Haar is using 10 image analyzed by doctor. from 2 normally image, 1 image can identified, from 6 masses image, 2 can identified, from 2 microclasification image, 2 can be identified as microclassification. Keywords: breast cancer, wavelet Haar, decomposition, energy, Euclidean.

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