Piv (Particle Image Velocimetry) - JAI Elite EL-2800M-GE2 User Manual

7.8.

PIV (Particle Image Velocimetry)

The Particle Image Velocimetry mode can be used in applications where 2 images need to 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 2 sec. 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 pulsed while the first frame is being read out. In this way, two strobe flashes generate two
video outputs.
Primary Settings
Exposure mode: Timed(PIV)
Trigger mode:
Frame Start :
Trigger option :
In this mode, the setting of Trigger Overlap is invalid.
Frame Start Trigger IN
Exposure Timing
Exposure Active
FVAL
DVAL
Time name
td
te1
te2
ift
FVAL non active
tframe1
tframe2
EL-2800M-GE2 / EL-2800C-GE2
ON
ON
PIV
td te1 ift
Description
Exposure beginning delay
First exposure time period
Second exposure time
Inter framing time
FVAL non active
First Frame read out
Second Frame read out
Fig.40
- 69 -
tframe1
te2 tframe 1 FVAL non active
PIV mode
tframe2
tframe 2
Time
424 clk
10 μs ～ 2 s
1 frame
Width of XSG
4LVAL
1 frame
1 frame