Data processing: measuring – calibrating – or testing – Measurement system – Orientation or position
Reexamination Certificate
2006-11-28
2006-11-28
Barlow, John (Department: 2863)
Data processing: measuring, calibrating, or testing
Measurement system
Orientation or position
C702S150000, C702S092000, C702S095000
Reexamination Certificate
active
07143004
ABSTRACT:
The device is a miniature, self-contained solid state orientation sensor. The unit utilizes three magnetometers and three accelerometers to calculate pitch, roll, and yaw (compass heading) angles relative to the earth's magnetic and gravitational fields. The three orientation angles are output in digital RS232 or optional multi-drop RS485. The device can also be programmed to provide raw accelerometer and magnetometer data in true physical units. The device is capable of measuring angles from 0 to 360 degrees on the yaw axis, 0 to 360 degrees on the pitch axis, and −70 to +70 degrees on the roll axis. The yaw output is compensated for errors due to pitch and roll using embedded algorithms. Applications include fast solid state compassing, robotics, virtual reality, down-hole well drilling, and body position tracking for biomedical and multimedia applications.
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Sears, Zemansky and Young, University Physics, Addison-Wesley, 1987, p. 14.
Horowitz and Hill, The Art of Electronics, Cambridge University Press, 1989, p. 665 and 830.
Arms Steven W.
Townsend Christopher P.
Barlow John
Cherry Stephen J.
Leas James Marc
Microstrain, Inc.
Neiman Thomas N.
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