8.Features
© 2023 China Daheng Group, Inc. Beijing Image Vision Technology Branch 128
8.2.2.
Switching Acquisition Mode
Two trigger mode are available: ON and OFF. When trigger mode is set OFF, the camera works in
continuous mode; when trigger mode is set ON, the camera works in trigger mode. It can be switched
between ON and OFF any time after the camera is opened.
As shown below, switching the acquisition mode at different positions will have different results.
Switch acquisition mode during frame reading out
Acquisition
Mode
Camera output
Continuous mode
Continuous Frame
Trigger mode
Trigger Frame
Continuous mode
Trigger
Continuous Frame
1
2
3
4
…
frame1
frame2
frame3
frame4
frame5
frame6
frame7
…
…
Figure 8-9 Switch acquisition mode during reading out
As shown in Figure 8-9, the camera starts with trigger mode OFF after receiving acquisition start command.
At point 1, the camera gets a command of setting trigger mode ON while transferring the 3
rd
frame in trigger
mode OFF. The trigger mode is not active until the 3
rd
frame is finished, at point 2, and then the trigger
signal will be accepted. At point 3, the camera gets a command of switching back to OFF. It is also not
active until the 5th frame is finished, it should wait a complete reading out. The camera actually switches
from trigger mode to continuous mode at point 4, and then the camera works in continuous mode.
Switch acquisition mode during blanking (or exposure)
Acquisition
Mode
Camera output
Continuous mode
Continuous Frame
Trigger mode
Trigger Frame
Trigger
1
2
3
4
frame1
frame2
frame3
frame4
frame6
…
…
…
…
frame5
Continuous mode
Continuous Frame
Figure 8-10 Switch acquisition mode in waiting time