KB026 What are measurement characteristics and what are their advantages?

With the measurement characteristics the laser distance sensors’ accuracy and measurement rate can be matched to your application’s requirements (see adjacent table – top image – above left).

Measurement characteristics: Normal, Fast, and Precise (see center image):

  • Generally a sensor needs more time for a measurement, if a high measurement accuracy is to be achieved. (i.e a high measurement accuracy results at a lower measurement rate, and vice versa)
  • These three measurement characteristics make it possible to achieve the optimal compromise between accuracy and measurement rate for the respective application.
  • The table shows the measurement rates possible under optimal conditions. However, in case of dark or distant measurement targets, the sensor automatically increases the measurement time, so that the required accuracy can be achieved.

Measurement characteristics: Timed (see imagine at bottom):

  • The Timed measurement characteristic is available for applications that require a constant measuring interval (e.g. with control loops).
  • If conditions are not optimal (dark or distant target), measurement time is not automatically increased. Instead, the measurement result is outputted with reduced accuracy at the end of the measurement interval.
  • If the measurement cannot be carried out in the required time, an error is outputted.

Measuring characteristics: Moving target:

  • This measurement characteristic is optimized for continuously and rapidly moving targets.
  • With the moving target characteristic, the quality of the measurement signal is crucial. Therefore the orange Dimetix reflective foil should be used whenever possible.
  • Moving target works best with steadily changing distances. Sudden changes in distance are still recorded correctly, but output accuracy is temporarily reduced.

You can find more information on measurement characteristics in our Technical Reference Manual in the download section.