HCM705B
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High Accuracy Gyro Compass
order to improve the accuracy, up to 50 points at most, the same sampling principle with the following
methods, just a sampling of the pitch angle and roll angle point will increase.
Note
: When you start the calibration and take points, move the compass to the following location, please
note that these points are not absolute heading orientation, but with reference to the first point sampling
heading orientation relative orientation change value. That is, you do not need to know which position the
real North Pole is in.Further for example, the 90degree rotation and 15 degrees pitch only one reference
value, to allow a certain sampling angle value error, unnecessarily strictly require very precise. Take at
least below12 points calibration, it is recommended that 24 points ,the user can sample more points in
order to improve the accuracy, up to 50 points at most, the same sampling principle with the following
methods, just a sampling of the pitch angle and roll angle point will increase.
The calibration steps are as follows:
The standard starting point can be anyone azimuth of
360 °, as long as each change angle to keep the basic
level about 90 ° to change (do not require too precise).
Example as left Pic.A: starting point for H = 0 °, R = 0 °,
P = +15 ° (firstly calibrate the pitch value P) please
keep this posture for 2 to 3 seconds don’t move, the
system will take the first point .
After took the first point, again rotate 90 ° horizontally,
please keep this posture for 2 to 3 seconds don’t
move, the system will take the second point.
After took the second point, again rotate
90 °horizontally, please keep this posture for 2 to 3 seconds don’t move, the system will take
the third point.
After took the third point, again rotate 90 ° horizontally, please keep this posture for 2 to 3
seconds don’t move, the system will take the fourth point.
After took the fourth point, H and R are the same, and
then in P angle value.
Refer to the left Pic.B: starting point H = 0 °, R = 0 °, P =
+55 ° ,please keep this posture for 2-3 seconds don’t
move, the system will take the fifth point.
After took the fifth point, again rotate 90 °horizontally,
please keep this posture for 2 to 3 seconds don’t
move,
the system will take the sixth point.
After took the sixth point, again rotate 90 °horizontally,
please keep this posture for 2 to 3 seconds don’t move, the system will take the seventh point.
After took the seventh point, again rotate 90°horizontally, please keep this posture for 2 to 3
seconds don’t move, the system will take the eighth point.
