Solid state orientation sensor with 360 degree measurement capability
First Claim
1. ) A solid state orientation sensor with 360 degree measurement capability, for use in a number of different structural and medical applications, comprising:
- primary means comprising a plurality of magnetic field measurement sensors;
secondary means comprising a plurality of response accelerometers; and
a microprocessor having first means for scaling sensors with calibration coefficients, and further having second means for quadrant checking for calculating the absolute angle from accelerometers.
2 Assignments
0 Petitions
Accused Products
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.
105 Citations
10 Claims
-
1. ) A solid state orientation sensor with 360 degree measurement capability, for use in a number of different structural and medical applications, comprising:
-
primary means comprising a plurality of magnetic field measurement sensors;
secondary means comprising a plurality of response accelerometers; and
a microprocessor having first means for scaling sensors with calibration coefficients, and further having second means for quadrant checking for calculating the absolute angle from accelerometers. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
Specification