Manual radarTOUCH Version 3.4
T. Schwirten LANG AG
14.10.10
Page 7
Figure 10 shows how the radarTOUCH could be used on a stage to give the presenter the
possibility to interact with his presentation in a completely new way. Please keep in mind
again that the real measurement resolution is a lot higher than in this picture.
Figure 10 radarTOUCH used on a stage
Theoretically the maximum distance for an obstacle to be detected is 50m. If an obstacle
gets successfully detected depends on a few parameters. These are theoretical values and
the performance should be tested while planning a project.
It depends mostly on the following parameters:
» Remission of the obstacle
Remission is not equal to reflexion: it describes a diffuse reflexion.
An ideal remitter would remit the light in the same way a Lambert emitter would.
The remission must be high enough to give the detecting unit in the measurement
device a chance to receive sufficient light. The so called inverse square law describes
the fact that the remitted light is reduced by the reciprocal value of the radius. This law
makes the importance of the remission obvious.
Figure 11 shows the minimum diffuse reflection in percent compared to the distance that
an obstacle needs to be detected. For these values the size of the obstacle has to be big
enough and is a given fact in the diagram.
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