Description ODSL 30
Leuze electronic GmbH + Co. KG
ODSL 30
40
3.8.2 Reduction in measurement time to as little as 30ms
Definition of uniqueness range
Due to the periodicity of the sinusoid, the phase position of the signals received by the ODSL30 limits the
determination of unique measurement values to within a specific interval. The length of this interval is
called the uniqueness range. A large uniqueness range is equivalent to high background suppression.
Relationship between uniqueness range - diffuse reflectance - measurement time
In the default setting (uniqueness range 150m, measurement on both light as well as dark objects with
diffuse reflectance of 6 … 90%), the measurement time is 100ms.
By limiting the uniqueness range and the diffuse reflectance (measurements on only light objects with
diffuse reflectance of 50 … 90%), the measurement time can be reduced to as little as 30ms.
Configuration is performed using the membrane keyboard and display:
Applic. Param.
->
Tmeas Bgnd Rem.
Changes to these variables yield measurement times as shown in the following table:
Example:
With a uniqueness range of 9.8m, an object is located at a distance of 1m. The sensor outputs a correct
measurement value of 1m.
If the object is located at a distance of 10.8m or 20.6m or 30.4m etc. from the sensor, the sensor outputs
an incorrect measurement value of 1m, i.e. a correct measurement value is only output for objects located
within the uniqueness range.
Figure 3.10: ODSL 30 measurement values with a uniqueness range of 9.8m
Meas. time
[ms]
Uniqueness range
[m]
Object diffuse
reflectance [%]
Setting in the menu item
Tmeas Bgnd Rem.
30
9.8
50 … 90
(light objects)
30ms 9.8m 50-90%
40
39
40ms 39m 50-90%
50
150
50ms 150m 50-90%
70
9.8
6 … 90
(light and dark
objects)
70ms 9.8m 6-90%
80
39
80ms 39m 6-90%
100
1)
150
100ms 150m 6-90%
1) Default setting
NOTE
By using the cooperative target CTS 100x100 (part no. 501 04599), you ensure that the diffuse
reflectance on the surface being measured is 50 … 90%.
ATTENTION
If an object is located at a distance greater than the preselected uniqueness range, incorrect
measurements will result (provided the reception signal is sufficiently high)!
0
0
10
20
10
20
30
40
50
60
Measur
ement value [
m
]
Distance [m]
Uniqueness range 9.8m
