Reference Manual Chapter 7
Ranger E/D
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Ranger E Parameters
Setting the Range axis parameter to 1 will make the Hi3D component number the rows
from the bottom of the ROI, and make the calculated range being measured from the
bottom of the ROI.
The Xsum and Sum values are delivered in two profiles, Xsum and Sum. However, Xsum is
a 19-bit value and Sum is a 13-bit value, and to be able to deliver the data efficiently, the
Ranger puts the 3 most significant bits of the Xsum value in the Sum profile.
015 015
015
01531
000
0000000000000
Figure 7.3 – The three most significant bits of the value from the Sum profile belongs to
the Xsum value.
The values can be calculated from the values in the profiles with the following formulas:
Sum = (value from Sum profile) AND 0x1FFF
Xsum = ((value from Sum profile) AND 0xE000) * 8 \
+ (value from Xsum profile)
By itself, the Sum values can be used as a measurement of the intensity of the laser line.
However, this intensity value has a different value range compared with for example Gray
component.
The Ranger has a limited number of digits for calculating the sums. This means that if the
ROI is large and the image is very bright, the calculation of the Xsum for a column may
overflow, resulting in a discrete jump in range value compared to the surrounding columns.
If this should happen, try the following:
Decrease the exposure of the sensor, by lowering the exposure time, decreasing the
aperture or decreasing the illumination.
Decrease the Number of rows parameter to use fewer rows in the ROI.
Use a lower setting of the AD bits parameter.
The used exposure time depends on both the Exposure time parameter and the Cycle
time parameter in the Measurement configuration.
Scan
Xsum
profile
Sum
profile
sum value
Sum value
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