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AM-201CL / AB-201CL
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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 15.56ms (in the case of 2 tap and
Binning OFF). 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)
Exposure
External Trigger
EEN
FVAL
DVAL
td
te1
ift
te2 tframe1
tframe2
4LVAL
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
~
15.56ms
10us
~
8.65ms
te2
Second exposure time
15.56ms (frame rate)
8.65ms (frame rate)
itf
Interframing time
5.97us
5.97us
tframe1
First Frame read out
15.42ms max
8.50ms max
tframe2
Second Frame read out
15.42ms max
8.50ms max
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
~
31.04ms
10us
~
17.21ms
te2
Second exposure time
31.04ms (frame rate)
17.21ms (frame rate)
itf
Interframing time
5.97us
5.97us
tframe1
First Frame read out
30.67ms max
16.81ms max
tframe2
Second Frame read out
30.67ms max
16.81ms max
Fig.36 PIV mode