ifm electronic JN2300 - Manual (Page 16)

Inclination sensor JN
16
9 Angle definition (0x2044)
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 (according to the right-
hand rule)�
– The X axis 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�
9.1 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 corresponds to a rotation about the Y axis of the sensor
and is called "longitudinal inclination value"�
The value corresponds to the angle [°] which the gravitation vector spans with the
YZ plane�
The second provided value corresponds to a rotation about the X axis of the
sensor and is called "lateral inclination value" (SDO index 6020h or 6120h)� The
value corresponds to the angle [°] between the gravitation vector and the XZ plane
of the sensor�
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�
9.2 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 Z axis of
the sensor is inclined� 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�