Matrix Vision mvBlueLYNX-X, Техническое руководство, Страница: 200 / 236

Figure 145: wxPropView - Setting the sample
Be aware of the drift of the individual timestamps.
20.7 Synchronized acquisitions using timers
20.7.1 Basics
Getting images from several cameras exactly at the same time is a major task in
3D image acquisitions
(the images must be acquired at the same time using two cameras) or •
acquisitions of larger objects
(if more than one camera is required to span over the complete image, like in the textile and printing
industry). •
To solve this task, the mvBlueLYNX-X offers
timers that can be used to generate pulse at regular intervals and •
USB to connect a second acquisition device like the mvBlueFOX USB cameras.
•
The pulse can be connected to a digital output. The digital output can be connected digital to the digital input
of one or more cameras to use it as a trigger.
The section Using a mvBlueFOX-MLC USB 2.0 camera with mvBlueLYNX-X shows how you can
use the mvBlueFOX-MLC as a second image acquisition device.
20.7.2 Connecting the hardware
One camera is used as master (M), which generates the trigger signal. The other ones receive the trigger signal
and act as slaves (S).
The following samples uses the mvBlueFOX-MLC as slaves (pin numbering!).
20.7.2.1 On the master camera
Connect power supply GND to pin 1 and pin 7. 1.
Connect power 12 V to pin 2 and pin 10 (power supply for the outputs). 2.
Connect DigOut1 of master (pin 6) to DigIn1 of master (pin 4). 3.
20.7.2.2 On each slave camera
Connect power supply GND to pin 8. 1.
Connect power supply < 5 V to the mvBlueFOX-MLC either via standard USB connector or pin 7. 2.
20.7.2.3 Between the cameras
Connect DigOut1 of master (pin 6) to DigIn0 of slave (pin 12). 1.
If more than one slave is used, connect the same pin 6 of master to all pin 12 of the slaves.
If each camera has its own power supply, then connect all grounds (GND) together.
mvBlueLYNX-X Technical Manual
190 22 April 2016 Version - 1.49 MATRIX VISION GmbH