Datalogic DV9500 Series, Installation Manual

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DV9500
2
1
Paragraph 1.1 describes the camera acquisition process.
Paragraph 1.2 describes the typical camera positioning.
Paragraph 1.3 describes some typical system configurations.
A detailed list of the camera kits and accessories is given in Appendix B.
1.1 PRINCIPLE OF OPERATION
The DV9500 camera is able to acquire images without any external control and with the
information coming from some external sensors.
This paragraph contains a brief description of the acquisition process necessary to
understand the camera mounting and setup parameters.
V
Height sensor
Package
Illuminator
Vertical plane
Conveyor belt or trays
α
αα
α
> 0 View angle
View plane
Height sensor to start distance
Camera
View line on
conveyor belt
Figure 2 – Reading station example
The camera manages three kinds of external sensors:
-
Speed Sensor: at all times the camera needs to know the speed of the objects to be
acquired. The speed sensor is usually an
OEK-1
optical encoder connected to the belt
that generates a square wave with a frequency proportional to the speed.
- Height/Side Position Sensor: the camera intrinsic depth of field is usually much lower
than the requested one. For this reason the DV9500 camera is equipped with a very high
speed autofocus system. This system is able to follow the parcel shape in real time
assuring perfectly focused images in every condition. The focusing position is computed
by the camera based on the position of the parcel measured by an height sensor (see
LCC-9010 or LCC-9006)
or by side position sensors (see
DK-500)
. Side position is always
expressed as a distance from the opposite side of the conveyor.