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All Journal International Journal of Electrical and Computer Engineering Indonesian Journal of Geography Jurnal Ilmu Dasar POSITRON Jurnal Sains Materi Indonesia Jurnal Sains dan Teknologi Nuklir Indonesia (Indonesian Journal of Nuclear Science and Technology) JOURNAL AGRIBUSINESS Jurnal VOK@SINDO Journal of Mathematical and Fundamental Sciences Journal of Engineering and Technological Sciences JFA (Jurnal Fisika dan Aplikasinya) Jurnal Spektra JOURNAL ONLINE OF PHYSICS Science and Technology Indonesia JOIV : International Journal on Informatics Visualization Journal of Science and Applicative Technology Neutrino Jurnal Otomasi Kontrol dan Instrumentasi Jurnal Ilmu Fisika JURNAL METEOROLOGI DAN GEOFISIKA Jurnal Review Pendidikan dan Pengajaran (JRPP) Risalah Fisika Jurnal Mekanova : Mekanikal, Inovasi dan Teknologi Sainstek : Jurnal Sains dan Teknologi Community Development Journal: Jurnal Pengabdian Masyarakat Pillar of Physics: Jurnal Berkala Ilmiah Fisika PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) Indonesian Journal of Physics (IJP) Newton-Maxwell Journal of Physics Journal of Engineering and Technological Sciences

Mitra Djamal

Institut Teknologi Bandung

Author-ID : 254743

Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Astronomy Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Physics Public Health Social Sciences Other

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PENGEMBANGAN SENSOR JARAK BERBASIS FLUXGATE Zannuraini Zannuraini; Mitra Djamal; Widyaningrum Indrasari
PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) Vol 4 (2015): PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) SNF2015
Publisher : Program Studi Pendidikan Fisika dan Program Studi Fisika Universitas Negeri Jakarta, LPPM Universitas Negeri Jakarta, HFI Jakarta, HFI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (555.246 KB)

A fluxgate is a magnetic sensor which works by comparing the measured magnetic field with the magnetic field reference, this sensor has been developed in various fields. This research aims to develop one of fluxgate aplication that is proximity sensor. Methode in this research is experiment with the steps are the manufacture of sensors, characterization and calibration sensor to distance. The result is fluxgate sensor with the ovale core Vitrovac type 6025Z, it has excitation coil about 360 windings and pick up coil about 240 windings. The characterization of sensor is known that the sensor has a sensitivity of 1639,7 mV/ Î¼T and work in the area Â± 2,3 Î¼T, with the maximum absolute error is 0,15298 Î¼T and maximum relative error is 3,257 %. From the calibration of distance has obtained that the sensor works at a distance from. 15,86 â€“ 27 mm. Keywords: Fluxgate, proximity sensor.

KARAKTERISASI SENSOR MAGNETIK FLUXGATE KUMPARAN SEKUNDER GANDA MENGGUNAKAN ELEMEN SENSOR MULTICORE Widyaningrum Indrasari; Mitra Djamal; Umiatin Umiatin
PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) Vol 1 (2012): PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) SNF2012
Publisher : Program Studi Pendidikan Fisika dan Program Studi Fisika Universitas Negeri Jakarta, LPPM Universitas Negeri Jakarta, HFI Jakarta, HFI

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Fluxgate is a magnetic sensor that capable to measure the magnetic field in a very small order. The basic principle of the fluxgate sensor is by comparing the measured magnetic field with the magnetic field reference. In this paper, we describe the characterization of fluxgate magnetic sensor using the double secondary coil design. Configuration of primary coil winding and secondary coil that be used is 4x40 and 2x60. We use vitrovacs 6025Z (1.5 mm width and 0.025 mm thick) as the sensor core. Sensor characterization with varying amounts of the core layer is made to determine the influence of the core layer to the demagnetization factor and the sensor sensitivity. The demagnetization factor is performed by measuring the dimensions of the sensor element and the inductance of the sensor. The inductance of the sensor is measured using a LCR meter GW Instek 829 series at a frequency of 10 kHz. The calculation results show that the increasing amounts of the vitrovac core layer is proportional to the demagnetization factor. To determine the sensor sensitivity, sensor calibration is performed by giving the external field on the calibration coil in a faraday chamber. From the sensor calibration we get the relationship between the external fields with the sensor output voltage. Based on this relationship, we can calculate the sensor sensitivity in working range Â± 4 Î¼T. Sensor sensitivity is inversely proportional to the amounts of vitrovac core layer. Sensor with 2 vitrovac core layers has the highest sensitivity (641 mV / Î¼T), and has the smallest absolute error (0.1 at the point of 3.87 Î¼T). Keywords: fluxgate, external field, vitrovac, sensitivity, demagnetization factor, inductance.

DESAIN DAN PENGEMBANGAN ELEKTROMAGNET PORTABEL BERBASIS PELAT TEMBAGA Sony Wardoyo; Mitra Djamal; Maman Budiman
PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) Vol 8 (2019): PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) SNF2019
Publisher : Program Studi Pendidikan Fisika dan Program Studi Fisika Universitas Negeri Jakarta, LPPM Universitas Negeri Jakarta, HFI Jakarta, HFI

Penemuan elektromagnet telah banyak memberikan pengaruh yang besar terhadap perkembangan ilmu pengetahuan dan teknologi, yang mana oleh karena sifat kemagnetan yang bisa diatur sehingga dapat memberikan manfaat praktis diantaranya motor listrik, relai, generator pembangkit listrik, dan saklar pintu otomatis. Pada penelitian ini dilakukan suatu desain dan rancangan elektromagnet berupa pelat tembaga yang di cetak berbentuk kepingan koin yang terdapat lubang ditengah untuk inti besi. Setiap pelat terdapat isolator yang memisahkan antar tiap pelat yang disusun berulir sehingga terbentuk heliks lilitan pelat tembaga. Hasil eksperimen didapat bahwa rancangan elektromagnet dengan menggunakan pelat tembaga, dapat menghasilkan medan magnet, 0 hingga 4 mTesla, dengan pengukuran menggunakan Gaussmeter. Implikasi pada penelitian ini akan berdampak pada riset fisika maupun ilmu rekayasa yang berkaitan pada penggunaan elektromagnet yang bersifat portabel dan ringkas, selain itu berpotensi untuk dikembangkan agar dapat menghasilkan medan magnet tinggi. The discovery of electromagnets has had a great influence on the development of science and technology, which is due to the magnetic nature that can be regulated so that it can provide practical benefits including electric motors, relays, generator power plants, and automatic door switches. In this study a design and design of an electromagnet in the form of a printed copper plate was formed in the form of a coin with a hole in the middle for an iron core. Each plate has an insulator that separates between each plate that is arranged in a thread so that a helical coil of copper plate is formed. The experimental results obtained that the electromagnetic design using a copper plate, can produce a magnetic field, 0 to 4 mTesla, with measurements using Gaussmeter. The implications of this study will have an impact on physics research and engineering science related to the use of electromagnets that are portable and compact, besides that they have the potential to be developed in order to produce high magnetic fields.

PENGARUH GELOMBANG ULTRASONIK TERHADAP PERILAKU LALAT RUMAH (MUSCA DOMESTICA) Riko Rakhmat; Mitra Djamal; Tri Siswandi Syahputra; Ikah Ning Prasetiowati P
PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) Vol 9 (2020): PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) SNF2020
Publisher : Program Studi Pendidikan Fisika dan Program Studi Fisika Universitas Negeri Jakarta, LPPM Universitas Negeri Jakarta, HFI Jakarta, HFI

Abstrak Kesehatan sebagai hal terpenting dalam kehidupan guna menunjang aktivitas. Salah satu faktor pengganggu kesehatan ialah penyakit yang disebarkan oleh lalat rumah dengan populasi yang besar sehingga sering ditemukan di sekitar lingkungan tempat beraktivitas. Untuk mengurangi dampak buruk dari lalat rumah, dibuat alat yang mampu menghalau lalat rumah sehingga mengurangi resiko penyebaran penyakit pada manusia. Alat yang dibuat ialah alat pengusir lalat rumah dengan menggunakan gelombang ultrasonik. Dipilih gelombang ultrasonik karena lalat rumah memiliki rentang frekuensi 36 kHz sampai 44 kHz. Pemaparan gelombang ultrasonik dilakukan pada lalat rumah yang di tempatkan pada wadah yang diberi atraktan berupak kotoran ayam dan daging ayam busuk. Variasi pemaparan gelombang ultrasonik dengan frekuensi interval 5 kHz selama 5 menit. Dari hasil eksperimen diperoleh frekuensi efektif 40 kHz dan jarak efektif 10 cm untuk menghalau lalat rumah pergi menjauhi sumber gelombang ultrasonik. Kata-kata kunci: Amplifier, Frekuensi, Lalat Rumah, Osilator, Ultrasonik. Abstract Health is the most important thing in life to support activities. One of the health disturbing factors is a disease spread by Housefly with a large population so that it is often found around the environment where it is active. To reduce the adverse effects of housefly, a tool that is able to dispel housefly can reduce the risk of spreading disease in humans. The tools that are made are Housefly repellent devices using ultrasonic waves. Ultrasonic waves were chosen because housefly have a frequency range of 36 kHz to 44 kHz. Ultrasonic wave exposure is carried out on housefly which are placed in containers that are given attractant with chicken manure and rotten chicken meat. Variation of ultrasonic wave exposure with 5 kHz interval frequency for 5 minutes. From the experimental results obtained an effective frequency of 40 kHz and an effective distance of 10 cm to ward off housefly away from the source of ultrasonic wave. Keywords: Amplifier, Frequency, Housefly, Oscillator, Ultrasonic.

CO2 Thermal Conductivity Detection in Gas Mixture for Concentration Measurement Using Bridge Configuration of Thermopiles Eko Satria; Melany Febrina; Mitra Djamal; Wahyu Srigutomo; Martin Liess
Science and Technology Indonesia Vol. 7 No. 4 (2022): October
Publisher : Research Center of Inorganic Materials and Coordination Complexes, FMIPA Universitas Sriwijaya

In this research, improvisation was carried out by modifying the market IR thermopile which functions as a thermal conductivity detector to measure the concentration of CO2 gas in the gas mixture. Four thermopiles are configured with a Wheatstone bridge with the aim of increasing the accuracy of the measurement system in detecting changes in CO2 concentration in the gas mixture (N2 and CO2). Using the bridge configuration of these four thermopiles, this measurement system can measure changes in CO2 concentration in small orders. The sensor developed is easy to manufacture, low cost, and has high linearity as evidenced by a correlation coefficient of 0.9943. From the experiments carried out, the sensor works quite accurately in detecting CO2 concentrations with the sensor’s sensitivity of -88.19 Volt/%, the detection range is 0% to 100%, and the RMS error value is 2.25.

Deposition of NiFeCo Thin Film for Giant Magnetoresistance (GMR) Material by dc-Unbalanced Magnetron Sputtering Method Togar Saragi; Mitra Djamal; Khairurrijal Khairurrijal; M. Barmawi
Indonesian Journal of Physics Vol 14 No 3 (2003): Vol. 14 No.2, Juli 2003
Publisher : Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (139.864 KB)

Deposition of NiFeCo thin films have been successfully grown by dc-unbalanced magnetron sputtering method. The linearity coefficient of thin films were 0.9169 at horizontal position and 0.953 at vertical position (sample 250902) and 0.8076 at horizontal position and 0.889 at vertical position (sample 260902), which is close to 1 for the ideal R-H characteristic. From XRD characterization, it was shown that the NiFeCo thin films were amorphous, and small grains, which was observed by SEM. The thin films thickness were 0.42 micrometer (sample 250902) and 0.26 micrometer (sample 260902). EDAX characterization shows that the composition of weight percent were: Ni(71.57%):Fe(7.44%):Co(20.99%) for sample 250902 and Ni(72.21%):Fe(10.27%):Co(17.25%) for sample 260902. These preliminary results will be discussed for future possibility of fabrication thin films in the prospect for device applications.

Design and Development Fluxgate Magnetometer and Its Applications Mitra Djamal
Indonesian Journal of Physics Vol 17 No 1 (2006): Vol. 17 No. 1, January 2006
Publisher : Institut Teknologi Bandung

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The paper explains design, development, and applications of fluxgate magnetometer, which is based on second harmonic Fourier component. The probe has a probe core of highly saturable material and at least two coils, a premagnetization coil and a pick-up coil. They are used to measure an external magnetic DC or low-frequency AC field, Bext. The probe is driven periodically into saturation by a sinusoidal current that flows through the premagnetization coil. It can be shown that the amplitude of the second harmonic frequency component will be measured by external magnetic field. The developed magnetometer can measure magnetic field with sensitivity 400mV/µT and relative error < 1.2 %. Some applications of the fluxgate magnetometer, e.g. non-contact current and displacement measurements have been developed and tested. It can be shown that the developed sensor can measure electric current until 1.9 A with relative error <5% and displacement in the range of 15 until 20 mm, with relative error <0.7%.

Sensor Modeling of a Vibration Sensor Mitra Djamal
Indonesian Journal of Physics Vol 17 No 4 (2006): Vol. 17 No. 4, October 2006
Publisher : Institut Teknologi Bandung

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A new type of vibration sensor based on flat coil element has been made. A sensor modeling based on a polynomial model for determining frequency and amplitude of the sensor has been developed. The model shows a good result with relative error under 6%.

The Influence of Ferromagnetic core, Pick-up Coil Winding Number and Environmental Temperature to the Output Signal of a Fluxgate Magnetic Sensor Yulkifli Yulkifli; Rahmondia N. S; Mitra Djamal; Khairurrijal Khairurrijal; Deddy Kurniadi
Indonesian Journal of Physics Vol 18 No 3 (2007): Vol. 18 No. 3 July 2007
Publisher : Institut Teknologi Bandung

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The paper explains some influence parameters of a fluxgate magnetic sensor e.g. number of ferromagnetic cores, number of pick-up coil winding and temperature. The sensors were built in three configurations of pick-up coil winding: 50x2, 60x2, and 70x2 turns, where the excitation coil was kept unchanged at 40x2 turns. The influence of ferromagnetic core and temperature were tested by using the configuration of 60x2 turns. The measurement results show that the increasing of core layer increases the measurement range: ± 100 µT (2 layers), ± 150 µT (6 layers) and ± 200 µT (10 layers). The increasing of pick-up coil winding number increases the sensor sensitivity: 260.64 mV/µT (40/50/40), 321.39 mV/µT (40/60/40) and 383.43 mV/µT (40/70/40). The increasing of temperature shifted the output signal to the higher position

Development of Visible Light Absorption Measurement for Concentrated Dye Solution based on Attenuated Total Reflection Technique and Improvement on its Analysis Method Hendro Hendro; Mitra Djamal; Wirawan Wirawan; Rahmat Hidayat
Indonesian Journal of Physics Vol 19 No 2 (2008): Vol. 19 No. 2, April 2008
Publisher : Institut Teknologi Bandung

An absorption measurement working in ATR (Attenuated Total Reflection) mode has been design for characterization of concentrate dye solution. The system consists of a visible light system as polychromatic wave source, an ATR plate made up from glass or polymer, a spectrometer with a CCD detector. The system is connected to a computer for measurement and data processing. Some commercial inks measured by this ATR system showed absorption spectra which are in agreement with the color of the inks. The absorption parameter will be determined from the incident and reflection beam intensities measured at incident angle larger than the critical angle. We have also carried out Poynting vector analysis and we will show that the energy flow in the normal direction of the interface is not zero. The energy flow, however, decreases along the normal direction of the interface, indicating energy loss due to light absorption in the sample medium. The amount of energy loss depends on the attenuation index or absorption parameters, which is important for formulating the relation between the measured intensities and absorption parameters.

Co-Authors Abdul Muid Abdul Waris Abi Hanafi, Aliif Fahrur Achmad, Fariz Aditya Alviori Adrian, Kristofer Ahmad Aminudin Akbar, Reyhan Nugraha Alam Purnama, Atra Ardiyanto Alamta Singarimbun Albab, Alfi Nur Almazari, Abar Ambran Hartono Aminah, Nina Siti Appriyana, Nazira Ari Setiawan Ashadi Amir Azizah Ghina Arifah Bergita Gela M. Saka Buchari Buchari Costrada, Aldo Novaznursyah Cut Novianti Rachmi, Cut Novianti Dadang Dadang Danang Trihatmoko, Danang Daniel Kurnia Daryono Hadi Tjahyono Dasapta Erwin Irawan, Dasapta Erwin Deddy Kurniadi Deny Juanda Puradimaja Dhani Herdiwijaya Dhani Herdiwijaya Emanuel Sungging Mumpuni Evita, Maria Faradyba, Anggi Fatahah Dwi Ridhani Fitrilawati Fitrilawati Freddy Haryanto H Mahfudz Hafizh Prihtiadi Harapan Marpaung Harmadi Harmadi Hendro Hendro Hendro Hendro Hendro Hendro Herlan Darmawan Herman Bahar Hong Joo Kim Hufri Hufri Husein H I Kadek Agus Sara Sawita I Made Astra Iful Amri Imam Suyanto Imam Taufiq Indah Permatasari Inggi Dwi Putri Irninthya Nanda Pratami Irwan irwan meilano Irzaman, Irzaman Ismail Rizka Pambudi Ivan Limansyah Jakrapong Kaewkhao Jayawarsa, A.A. Ketut Juneman Abraham Juniastel Rajagukguk Juniastel. R Kane, Hansel Khairurrijal Khairurrijal Kim, Hong Joo Kumalasari, Ratih Lia Yuliantini Lia Yuliantini Linus Pasasa M. Barmawi Maman Budiman Maria Evita Maria Evita Martin Liess Martin Liess Melany Febrina Mochammad Tanzil Multazam Moh Yasin Muhammad Kamal Mukhlizar, Mukhlizar Mukti, Rino Rakhmata Mulyaningsih, Indrya Murhaban Mustikawati, Sekar Tanjung Ni Ketut Lasmia Nina Aminah, Nina Nina Siti Aminah Nur Ismirawati, Nur Prihatini, Jihan Putra, Adiyasa Pratama Putra, Heriansyah R. N. Setiadi Rahmat Hidayat Rahmat Hidayat Rahmondia N. S Rahmondia N. Setiadi Rahmondia Nanda Ramadan, Hafiz Arshad Ramdhani, Adrian Pandjie Ramli Ramli Ramli Ramli Rausyanfikr, Fadhil Retna Apsari Riko Rakhmat Sanjaya, Yogie Sara Sawita, I Kadek Agus Sari, Mona Berlian Sari, Mona Berlian Satria, Eko Sawita, Agus Sara Sawita, I Kadek Agus Sara Siti Aminah, Nina Sony Wardoyo Sparisoma Viridi Suparno Satira Suprijadi Suprijadi Suprijadi Suprijadi Suprijadi Suprijadi Suryanto, Wiwit Suyatno Suyatno Suyatno, Suyatno Tarigan, Darell Timothy Thomas Djamaluddin Togar Saragi Tri Siswandi Syahputra Umiatin, Umiatin Wahyu Srigutomo Wahyudi Wahyudi Widyaningrum Indrasari Wilson Jefriyanto Wirawan Wirawan Wirawan, Rahadi Yudi Nugraha Yuliantini, Lia Yulkifli Yulkifli Yulkifli Yulkifli Yulkifli Yulkifli Yulkifli Yulkifli Yusaku Fujii Zaki Suud Zannuraini Zannuraini Zul Anwar

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