Ifm-electronic JN2300 Manuel d'utilisateur télécharger pdf (Page 16)

Inclination sensor JN

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�

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Ifm-electronic JN2300 Manuel d'utilisateur Page 16