National Instruments NI Vision NI 17xx 用户手册
Chapter 5
Image Acquisition
5-10
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Refer to Equations 5-5 and 5-6 to calculate the minimum frame period for
triggered acquisitions with and without strobing.
triggered acquisitions with and without strobing.
(5-5)
(5-6)
where
T is the trigger synchronization variability,
L is the lighting turn-on time,
E is the exposure time, and
R is the image readout duration.
Tables 5-1 and 5-2 list the values for the trigger synchronization variability
and the lighting turn-on time, respectively.
and the lighting turn-on time, respectively.
The image readout duration varies depending on the smart camera
configuration, as shown in Table 5-3.
configuration, as shown in Table 5-3.
Table 5-3. Image Readout Duration
Smart Camera Model
Full Scan
1/2 Scan
1/4 Scan
Binning
NI 1722
NI 1742
NI 1762
NI 1742
NI 1762
16.38 ms
8.86 ms
5.49 ms
8.17 ms
NI 1744
NI 1764
NI 1764
76.47 ms
41.38 ms
24.70 ms
38.23 ms
min frame period
NoStrobeWithTrigger
max T L E
+
+
Trigger Delay
,
(
)
=
min frame period
WithStrobeWithTrigger
max T L E R
+
+
+
Trigger Delay
,
(
)
=