Ifm-electronic JN2300 Manuel d'utilisateur télécharger pdf (Page 17)

Inclination sensor JN

Value range for this option

– Inclination value longitudinal (gradient angle): -90°…+90°

– Inclination value lateral (angle of direction): 0°…360°

Critical point

With a gradient angle of 0° the sensor is in a horizontal position� In this position the

second angle (angle of direction) is useless� In practice, it is to be expected that

the value of the second angle will vary very strongly even if the sensor is virtually

motionless�

9.3 Gimbal angle X (0x2044 = 2)

As with the Euler angle the current orientation of the sensor is described by two

successive rotations from the horizontal position�

But the current orientation now arises from a rotation about the Y axis with the

angle value [°] indicated by the "inclination value longitudinal" as well as from

a rotation which then follows about the (now rotated) X axis with the angle [°]

"inclination value lateral"�

Interpretation

If you imagine the sensor as a plane whose body shows in X direction and

whose wings in Y direction, the "inclination value longitudinal" corresponds to the

longitudinal inclination of the plane (pitch angle) and the "inclination value lateral"

to the bank angle (roll angle) of the plane�

Value range

– Inclination value longitudinal: -90°…90°

– Inclination value lateral: -180°…180°

Critical point

With a longitudinal inclination of ± 90° ("plane" flies vertically downwards or

upwards) the roll angle makes a rotation about the gravitational axis which cannot

be detected by the inclination sensor� In this condition the "inclination value lateral"

is insignificant� In practice, the "inclination value lateral" will vary very strongly

when it is close to this condition even if there is only little movement�

9.4 Gimbal angle Y (0x2044 = 3)

This setting corresponds to the setting described in 8�3 with the difference that the

order of the two rotations is now inverted� In this option the measured object is first

rotated about its X axis with the angle [°] "inclination value lateral"� The measured

object is then rotated about the Y axis (which is now inclined) with the angle value

[°] indicated by the "inclination value longitudinal" of the sensor�

As a result of this the measured values of the gimbal angle X and the gimbal angle

Y are identical as long as the measured object is only rotated about one of the

sensor's axes� The measured values of the two options do not differ until a general

rotation is made about the two sensitivity axes�

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Ifm-electronic JN2300 Manuel d'utilisateur Page 17