scholarly journals Rancang Bangun Sistem Pengukuran Medan Magnet Menggunakan LabVIEW, CONTROLLER NI cRIO-9022, dan DTM-151 Digital Teslameter

2015 ◽  
Vol 5 (2) ◽  
pp. 133
Author(s):  
Musaffiriyan Rasyid Ghoni ◽  
Andi Dharmawan ◽  
Slamet Santosa
Keyword(s):  
Magnetic Field ◽  
Measurement System ◽  
Field Measurement ◽  
Control Function ◽  
Reading Speed ◽  
Data File ◽  
Stepper Motor ◽  
Magnetic Field Measurement ◽  
Motor Speed ◽  
The Magnetic Field

Abstrak                Pusat Teknologi Akselerator dan Proses Bahan (PTAPB) BATAN Yogyakarta sedang mengembangkan sistem pengukuran medan magnet untuk alat siklotron. Pengukuran medan magnet pada siklotron diperlukan untuk mengetahui besar dan arah dari medan magnet.        Sistem ini menggunakan LabVIEW untuk membuat aplikasi antarmuka (HMI) dan pemrograman sistem. Implementasi fungsi kendali menggunakan controller NI cRIO-9022 yang dirangkai dengan modul NI 9512, yang akan mengatur kerja komponen penggerak, yaitu stepper motor. Implementasi fungsi akuisisi data menggunakan DTM-151 Digital Teslameter untuk mengukur kuat medan magnet. Pengukuran  menggunakan bidang koordinat kartesian (x,y).            Sebuah magnet permanen digunakan sebagai objek uji pengukuran. Ukuran magnet uji lebih kecil dari dimensi pengukuran sistem sehingga dimensi pengukuran terhadap bidang magnet dibuat berukuran (100 x 100) mm. Koordinat posisi awal teslameter 1 dan teslameter 2, secara berurutan, adalah (430,720) dan (430,240). Pengujian dilakukan sebanyak 2 kali (2 posisi magnet yang berbeda). Masing-masing pengujian dilakukan 3 kali pengukuran sehingga didapatkan 6 file data. Dari jumlah file data tersebut didapatkan jumlah data dengan rata-rata 1.117 data setiap file-nya. Kecepatan putar motor yang digunakan saat pengujian adalah 25 mm/s. Laju pembacaan data sebesar 10 data/s, interval dari perubahan posisi ketika motor berputar bernilai 2,5 mm. Kata kunci—sistem pengukuran medan magnet, LabVIEW, controller,teslameter, stepper motor, metode kendali on-off, komunikasi serial. Abstract            Pusat Teknologi Akselerator dan Proses Bahan (PTAPB) BATAN Yogyakarta currently developing a magnetic field measurement system for cyclotron machine. Magnetic field measurement on cyclotron is required to determine the magnitude and direction of the magnetic field.            The system used LabVIEW to create an interface application (HMI) and system programming. The control function implemented by using controller NI cRIO-9022 combined with NI 9512 module, which would controlling the motion component, that isthe  stepper motor. The acquisition data function implemented by using DTM-151 Digital Teslameter to measure the magnetic field. The measurement works within the cartesian coordinate plane (x,y).            A permanent magnet was used as the measurement trial object. The size of the magnet was smaller than measurement dimension of the system therefore the  measurement dimension of the magnetic plane was made with the size of (100 x 100) mm. The initial position coordinate of the teslameter 1 and teslameter 2, respectively, set at (430,720) and (430,240). The trial was excuted 2 times (2 different magnet position). Each trial consist of 3 times measurement, so there’s 6 data file obtained. On those data file, there’s an average of 1.117 data on each file. The motor speed was set on 25 mm/s. The data reading speed was set on 10 data/s, which would caused a 2,5 mm interval on one single data.  Keywords—magnetic field measurement system, LabVIEW, controller, teslameter, stepper motor, on-off control methode, serial communication.

scholarly journals Attitude Estimation of Underwater Vehicles Using Field Measurements and Bias Compensation

Sensors ◽  
2019 ◽  
Vol 19 (2) ◽  
pp. 330 ◽  
Author(s):  
Nak Ko ◽  
Seokki Jeong ◽  
Suk-seung Hwang ◽  
Jae-Young Pyun
Keyword(s):  
Magnetic Field ◽  
Field Measurement ◽  
Field Measurements ◽  
Underwater Vehicle ◽  
Field Vector ◽  
Attitude Estimation ◽  
Magnetic Field Measurement ◽  
Euler Angles ◽  
Measured Field ◽  
The Magnetic Field

This paper proposes a method of estimating the attitude of an underwater vehicle. The proposed method uses two field measurements, namely, a gravitational field and a magnetic field represented in terms of vectors in three-dimensional space. In many existing methods that convert the measured field vectors into Euler angles, the yaw accuracy is affected by the uncertainty of the gravitational measurement and by the uncertainty of the magnetic field measurement. Additionally, previous methods have used the magnetic field measurement under the assumption that the magnetic field has only a horizontal component. The proposed method utilizes all field measurement components as they are, without converting them into Euler angles. The bias in the measured magnetic field vector is estimated and compensated to take full advantage of all measured field vector components. Because the proposed method deals with the measured field independently, uncertainties in the measured vectors affect the attitude estimation separately without adding up. The proposed method was tested by conducting navigation experiments with an unmanned underwater vehicle inside test tanks. The results were compared with those obtained by other methods, wherein the Euler angles converted from the measured field vectors were used as measurements.

A rotating coil probe for the magnetic field measurement on a long pulsed tokamak

1999 ◽  
Vol 70 (1) ◽  
pp. 445-448 ◽  
Author(s):  
J. Fujita ◽  
K. Matsuura ◽  
K. Kawahata ◽  
S. Fujiwaka ◽  
S. Itoh ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Field Measurement ◽  
Magnetic Field Measurement ◽  
The Magnetic Field

Diagnostic method for the magnetic field measurement in the plasma focus device

1989 ◽  
Vol 31 (4) ◽  
pp. 587-594 ◽  
Author(s):  
S Czekaj ◽  
A Kasperczuk ◽  
R Miklaszewski ◽  
M Paduch ◽  
T Pisarczyk ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Plasma Focus ◽  
Field Measurement ◽  
Diagnostic Method ◽  
Plasma Focus Device ◽  
Magnetic Field Measurement ◽  
The Magnetic Field
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