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AN INVESTIGATION OF THE EFFECTS OF MAGNETIC VARIATIONS ON INERTIAL/MAGNETIC ORIENTATION SENSORS

Peterson, Christopher W
http://rave.ohiolink.edu/etdc/view?acc_num=miami1063132921

Abstract Details

2003, Master of Systems Analysis, Miami University, Systems Analysis.
Sourceless human posture tracking in real-time can be accomplished using small inexpensive inertial/magnetic (IM) sensor modules to track the orientation of individual limb segments. Three magnetometers, accelerometers, and angular rate sensors are each aligned orthogonally in the sensor modules. The magnetometers measure the orientation change of the sensor relative to the local magnetic field. A question related to this particular tracking method is to what degree the inexpensive IM sensors are affected by local variations in the earth magnetic field. This thesis describes and documents experiments related to magnetic variations on IM sensors. These experiments begin to build fundamental knowledge about these sensors and how they interact with the environment in order to establish a basis for possible corrective algorithms. The investigation includes, testing the IM sensors to determine their sensitivity to local magnetic field changes, and investigating the magnetic variations produced by small appliances and ferrous objects. Results indicate that local magnetic variations cause errors in only azimuth estimation regardless of sensor module orientation and that these errors can be avoided by maintaining a distance of one to two feet from the source of interference. Examination of the nature of the variation indicates that alternating field sources of interference could be reduced through the use of a notch filter tuned to the appropriate frequency.
Eric Bachmann (Advisor)
61 p.
Computer Science
Orientation; Sensors; Virtual; Reality; Variations; Inertia; Magnetic

Recommended Citations

Citations

  • Peterson, C. W. (2003). AN INVESTIGATION OF THE EFFECTS OF MAGNETIC VARIATIONS ON INERTIAL/MAGNETIC ORIENTATION SENSORS [Master's thesis, Miami University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=miami1063132921

    APA Style (7th edition)

  • Peterson, Christopher. AN INVESTIGATION OF THE EFFECTS OF MAGNETIC VARIATIONS ON INERTIAL/MAGNETIC ORIENTATION SENSORS. 2003. Miami University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=miami1063132921.

    MLA Style (8th edition)

  • Peterson, Christopher. "AN INVESTIGATION OF THE EFFECTS OF MAGNETIC VARIATIONS ON INERTIAL/MAGNETIC ORIENTATION SENSORS." Master's thesis, Miami University, 2003. http://rave.ohiolink.edu/etdc/view?acc_num=miami1063132921

    Chicago Manual of Style (17th edition)

miami1063132921
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© 2003, all rights reserved.
This open access ETD is published by Miami University and OhioLINK.