8.Features
© China Daheng Group, Inc. Beijing Image Vision Technology Branch 30
acquire a frame of image until the
AcquisitionStop
command is executed. It is not necessary to execute
the
AcquisitionStart
command every time.
2)
When the trigger mode is set to Off
After executing the
AcquisitionStart
command, the camera will continuously acquire images until it
receives the
AcquisitionStop
command.
You can check if the camera is in the waiting trigger status by the camera's trigger wait signal or
by using the acquisition status function.
8.2.3.
Switching Trigger Mode
During the stream acquisition process, the user can switch the trigger mode of the camera without the
AcquisitionStop
command.
As shown below, switching the trigger mode at different positions will have different results.
⚫
Switch trigger 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 8-10 Switch trigger mode during frame reading out
As shown in Figure 8-10, 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 5
th
frame is finished, it should wait a complete reading out. The camera switches from
trigger mode to continuous mode at point 4, and then the camera works in continuous mode.
⚫
Switch trigger mode during blanking
