VB24
81
7
READING FEATURES
7.1
ADVANCED CODE RECONSTRUCTION (ACR™ 4)
The traditional way of barcode reading could be called “Linear Reading”. In this case, the laser
beam crosses the barcode symbol from its beginning to its end as shown in the following
figure:
Laser Beam
Figure 77 – Linear Reading
In Advanced Code Reconstruction mode it is no longer necessary for the laser beam to cross
the label from the start to the end. With just a set of partial scans on the label (obtained using
the motion of the label itself), the scanner is able to “reconstruct” the barcode. A typical set of
partial scans is shown in the figure below:
Code Direction
Figure 78 – Partial Scans
None of the partial scans contains the whole label. The decoder aligns each partial scan
correctly and combines them in order to obtain the entire code.
The alignment is performed by calculating the time difference from one partial scan to another
using a reference code element.
ACR4 therefore has an intrinsic ability to increase the reading percentage of damaged codes
as in the examples below:
Содержание FUQ-B8
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Страница 22: ...VB24 12 b Operating mode selection and definition c Digital Outputs configuration ...
Страница 42: ...VB24 32 Figure 16 Positioning with U Shape Mounting Bracket Pitch Skew 0 15 45 45 15 alignment marks ...
Страница 54: ...VB24 44 Figure 28 ID NET Network Connections with isolated power blocks Power Supply Power Supply Power Supply ...
Страница 55: ...VB24 45 Figure 29 ID NET Network Connections with Common Power Branch Network ...
Страница 56: ...VB24 46 Figure 30 ID NET Network Connections with Common Power Star Network ...
Страница 72: ...VB24 62 Figure 52 ID NET Network Connections with isolated power blocks Power Supply Power Supply Power Supply ...
Страница 73: ...VB24 63 Figure 53 ID NET Network Connections with Common Power Branch Network ...
Страница 74: ...VB24 64 Figure 54 ID NET Network Connections with Common Power Star Network ...
Страница 112: ...VB24 102 T Technical Features 108 Troubleshooting 105 Typical Layouts 77 ...