ifm electronic JN2100 v.2.0 - Manual (Page 16)

Inclination sensor JN
16
7.6 Angle definition (2044h)
To be able to adapt the inclination sensor to the different applications as easily
as possible, the measured inclination information is converted into different angle
indications� The requested angle indication is set by selecting the respective
option�
With this angle definition a sensor coordinate system is used which is defined as
follows:
– The mounting plane corresponds to the xy plane
– The z axis is perpendicular to the mounting plane
– The x direction is represented by an edge of the mounting plate which shows
in direction of the printed x arrow�
– The y axis is then perpendicular to the plane spanned by the z and x axes�
7.6.1 Perpendicular angle (0x2044 = 0)
Using the indication of the two perpendicular angles the inclination of the sensor
coordinate system towards the direction of gravitation is described�
The first provided value (inclination value longitudinal; OD: 6010h) indicates the
angle [°] which the gravitation vector spans with the yz plane� The second provided
value (inclination value lateral; OD 6020h) indicates the angle [°] between the
gravitation vector and the xz plane�
In the case of an inclination in a plane (rotation of an axis with the second axis remaining
perpendicular) the perpendicular angle and gimbal angle are always identical�
7.6.2 Euler angle (0x2044 = 1)
In this setting the two provided angle values are to be interpreted as Euler angle�
The current sensor orientation is determined by two successive rotations from the
horizontal position�
The "inclination value longitudinal" indicates the angle [°] at which the sensor was
first rotated about the sensor's x axis� The "inclination value lateral" corresponds to
the angle [°] at which the sensor was then rotated about the (inclined) z axis�
Interpretation
The first angle value corresponds to the angle between the gravitation vector and
the sensor's z axis (slope inclination, gradient angle) whereas the second angle
value indicates the direction in which the slope inclination matches the coordinate
system�