SICK IVP Ranger E/D

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Chapter 3 Operating Instructions

Ranger E/D

Overview

The performance of the Ranger – that is, the maximum number of profiles it can deliver

each second – depends on the chosen measurement method, but also on the height of

the ROI in which to search for the profile. The more rows in the ROI, the longer it takes to

search.

Therefore, one way of increasing the performance of the Ranger is to use a smaller ROI.

Figure 3.6 – A ROI with few rows will be faster to analyze than a ROI with many rows.

Note that the maximum usable profile rate can be limited by the characteristics of the

object’s surface and conditions in the environment.

Intensity Components

The Intensity components are used for measuring light reflected from the object. They can

be used for example for measuring gloss, inspecting the structure of the object surface, or

inspecting print properties. They can also be used for measuring how objects respond to

light of different wavelength, by using for example colored or IR lightings.

There are two different intensity components:

Gray Measures reflected light along one or several rows on the sensor.

HiRes Gray Available in Ranger models C55 and E55. Uses a special row on the

sensor that contains twice as many pixels as the rest of the sensor

(3072 pixels versus 1536 pixels). The profiles delivered by the HiRes

Gray component therefore has double the resolution compared with the

ordinary Gray component.

Figure 3.7 – Grayscale (left) and gloss (right) images of a CD. Both the text and the crack

are present in both images, but the text is easier to detect in the left image

while the crack is easier to detect in the right.

Some of the range components also deliver intensity measurements. The difference

between using these components and using the Gray or High-res Gray component is that

the Gray and Hi-res Gray components measure the intensity on the same rows for every

column on the sensor, whereas the range components measure the intensity along the

triangulation laser line, which may be located on different sensor rows for each column.

SICK IVP Ranger E/D - Page 18