AM-200CL / AB-200CL
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7.9. PIV (Particle Image Velocimetry)
The Particle Image Velocimetry mode can be used in applications where 2 images should be
taken with a very short time interval. It can only be used with strobe flash as
illumination. The first accumulation time is 10
sec to 14.69ms. Then, the second exposure
will be taken. The accumulation is LVAL asynchronous. The first strobe is activated during
the first exposure duration and the second strobe is taken while the first frame is being read
out. In this way, two strobe flashes generate two video outputs.
The frame rate for full pixels readout is 32.1fps for 2-tap output and 16.1fps for 1 tap
output.
Primary Settings
Sensor Digitization Taps: SDT= 0 (Two taps) SDT=1 (One tap)
Exposure mode : Timed
PIV control : ON
Trigger mode:
TM=1 (ON)
Timing specifications for 2 tap output
time name
description
Time
Binnig Control
Off , 2x1
Binnig Control
1x2 , 2x2
td
Exposure beginning delay
5.24us
7.96us
te1
First exposure time period
10us
~
14.694ms
10us
~
8.272ms
te2
Second exposure time
14.694ms (frame rate)
8.272ms (frame rate)
itf
Interframing time
5.97us
5.97us
tframe1
First Frame read out
14.574ms max (606L)
8.139ms max (306L)
tframe2
Second Frame read out
14.574ms max (606L)
8.139ms max (306L)
Timing specifications for 1 tap output
time name
description
Time
Binnig Control
Off , 2x1
Binnig Control
1x2 , 2x2
td
Exposure beginning delay
5.24us
7.96us
te1
First exposure time period
10us
~
29.316ms
10us
~
16.465ms
te2
Second exposure time
29.316ms (frame rate)
17.21ms (frame rate)
itf
Interframing time
5.97us
5.97us
tframe1
First Frame read out
29.196ms max (1214L)
16.332ms max (614L)
tframe2
Second Frame read out
29.196ms max (1214L)
16.332ms max (614L)
Fig.36 PIV mode
Exposure
External Trigger
EEN
FVAL
DVAL
td
te1
ift
te2 tframe1
tframe2
4LVAL