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User Manual - QG65N2 SAE J1939 Inclinometer (Type JB) V1.1
6.
Functional description
6.1.
Inclination measurement principle
QG65N2 Inclinometers measure inclination by measuring static acceleration of gravity using an accelerometer
MEMS. In static conditions, inclination measurement by this principle is accurate and reliable.
However, the vibrations or movements present on almost all industrial machines generate undesirable g-forces.
These dynamic g-forces accumulate and overlay the static g-forces, causing a ‘dirty’ inclination output that includes
spurious or noise components.
A low-pass filter can stabilize the output, that can be enough for some applications. The downside of this filtering is
that it increases the reaction time (latency) of the inclinometer. In a control system this results in a limit on the
speed of movements, and reduced machine efficiency.
If the dynamic effects are dominant and acceptable delay time is limited, please consider our Dynamic
inclinometer, where with the help of a gyroscope a sort of filtering is achieved without having the downside of
delay time.
6.2.
Measuring axis and direction
6.2.1.
Measuring axis and direction for Inclination
A single-axis inclinometer (vertical mount)
measures the inclination in the vertical plane over the full range 0-
360° (X-output). The default 0° position and the measuring direction are shown in Figure 8.
Figure 8 - Measuring axis and direction of 1-axis inclination.
