OXTS Survey+ v3, Руководство пользователя

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RT-Range User Manual
Revision: 190902
21
Hardware installation
It is essential to install the rigidly in the vehicle. The should not be able
to move or rotate compared to either GNSS antenna, otherwise the performance will be
reduced. In most circumstances the should be mounted directly to the chassis of
the vehicle. If the vehicle experiences high shocks, then vibration mounts may be
required.
The is compatible with the RT-Strut product from OxTS to provide a quick and
secure vehicle mounting solution.
Do not install the where it is in direct sunlight as, in hot countries, this may cause
the case to exceed the maximum temperature specification.
orientation and alignment
The orientation of the in the vehicle is normally specified using three consecutive
rotations that rotate the to the vehicle’s co-ordinate frame. The order of the
rotations is heading (
z
-axis rotation), then pitch (
y
-axis rotation), then roll (
x
-axis
rotation). The co-ordinate conventions are detailed on page 28. It is important to
get the order of the rotations correct.
In the default configuration the expects its
y
-axis to be pointing right and its
z
-
axis pointing down relative to the host vehicle. There are times however when installing
an in the default configuration is not possible, for example when using the RT-
Strut. The can be mounted at any angle in the vehicle as long as the configuration
is described to the using NAVconfig. This allows the outputs to be rotated based
on the settings entered to transform the measurements to the vehicle frame.
For ease of use, it is best to try and mount the so its axes are aligned with the
vehicle axes. This saves the offsets having to be measured by the user. If the system must
be mounted misaligned with the vehicle and the user cannot accurately measure the angle
offsets, the has some functions to measure these offsets itself. The heading offset
can be measured if the vehicle has a non-steered axle. The Improve Configuration wizard
in NAVconfig should be used for this (see pages 84 to 89 respectively).
Antenna placement and orientation
For optimal performance it is essential for the GNSS antenna(s) to be mounted where
they have a clear, uninterrupted view of the sky and on a suitable ground plane, such as
the roof of a vehicle. For good multipath rejection the antennas must be mounted on a
metal surface using the magnetic mounts provided; no additional gap may be used.
The antennas cannot be mounted on non-conducting materials or near the edges of
conducting materials. If the antennas are to be mounted with no conductor below them