The Basic Research for the New Compass System Using Latest MEMS

• Autorzy: Fukuda G. , Hayashi S.
• Języki publikacji: EN

Abstrakty

EN

This paper demonstrates basic research for a new compass system using latest MEMS (Micro Electro Mechanical Systems) sensors for small vessels. In 2007, MEMS Electrostatically Gyro (ESG) was introduced by TOKYO KEIKI which is a Japanese company. This sensor accuracy has dramatically improved compared to vibration types. For example, instability has been improved 10 times more than the vibration types. The reproducibility was tested and maximum difference was 0.55 [deg/sec] in the field test. The MEMS-ESG could detect the relative angles as accurate as GPS compass in short term use. Even though sen-sor accuracy has been improved, an improvement of another 10 times is needed to detect the earth’s turn rate. Because of this a second system is required for a complete compass system. A celestial navigation system is one of the possibilities to complement this. Traditionally the sextant has been used for measuring the altitude, but it has some human errors and difficult to measure continuously. Therefore, it might be useful to get sun altitude and direction automatically. In this thesis, the sun altitude and direction detecting system using camera devices are studied. Using 350×288 resolution camera and a radio-controlled clock, the sun movement was detected 5’14” per pixels and 2’16”. per pixels for the altitude and direction respectively. Although this is a basic research for an integrated system, the data should have an enormous affect upon future research.

Słowa kluczowe

EN

Navigational Equipment; Compass System; Micro Electro Mechanical Systems (MEMS); Electro-Statically Gyroscope (ESG); Global Positioning System GPS; Ring Laser Gyro (RLG); fiber optic gyro (FOG); MEMS-ESG

• Wydawca: Faculty of Navigation, Gdynia Maritime University
• Czasopismo: TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
• Rocznik: 2010
• Tom: Vol. 4, no. 3
• Strony: 317--322
• Opis fizyczny: Bibliogr. 8 poz., rys., tab.

Twórcy

autor

Fukuda G.

• Graduate Student in Tokyo University of Science and Technology, Tokyo, Japan

autor

Hayashi S.

• Tokyo University of Science and Technology, Tokyo, Japan

Bibliografia

• 1 Gen F. & Shogo H., 2008. Basic Research of the MEMS Iner-tial Navigation Equipment for the Small Vessels, The jour-nal of Japan Institute of Navigation, pp. 213-220
• 2 Japan Coast Guard. 2008. Celestial Position Calculation. http://www1.kaiho.mlit.go.jp/KOHO/syoshi/furoku/na09-data.pdf/
• 3 David Titterton & John Weston. 2004. Strapdown Inertial Nav-igation Technology, Edition, pp. 103-105
• 4 Shigeru Nakamura. 2008. Development and applications of ESG Gyro Float・Turning type MEMS inertial sensor, 4th Published by the Japanese Committee for Radio Aids to Navigation
• 5 Kenji Hasegawa. 1994. Celestial Navigation. Kaibundou
• 6 Fabio C. & Eric K. 1995. Robot Localization using a computer Vision Sextant, Robotics Institute, Carnegie Mellon Univer-sity
• 7 Matthew C. D. & David W. & Daniel V., 2005. A Sun Tracker for Planetary Analog Rovers. NASA Ames Research Center, QSS Group Inc., Carnegie Mellon University
• 8 Kou N., 1999. Computations of Sunrise and Sunset, Tijin Shokan,P.76