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81100 Family of Pulse/Pattern Generators
Double Pulse Generation for Particle Image Velocimetry
(PIV) Measurements
Introduction
Keysight Technologies, Inc. pulse/pattern generators are used for research in the
aerospace and defense industry, among others.
One example of their use is in the reduction of takeoff and landing times at
airports and the prevention of problems caused by wake vortex. Here, the industry
works with methods like PIV (Particle Image Velocimetry) where a laser sends
a double light pulse out. Particles in a flow get illuminated by the pulses and a
camera takes pictures every time the particle reflects the light. (Figure 1)
The 81150A can simulate this double light pulse by varying the delay and the
repetition frequency of the pulses.
Air flow, wind
Light pulse
Laser
Figure 1. PIV method
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Dust or
other particles
Photo detector
T E C H N I C A L
O V E R V I E W
T E C H N I C A L
O V E R V I E W
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Related Manuals for Keysight Technologies 81100 Series
Summary of Contents for Keysight Technologies 81100 Series
- Page 1 Double Pulse Generation for Particle Image Velocimetry (PIV) Measurements Introduction Keysight Technologies, Inc. pulse/pattern generators are used for research in the aerospace and defense industry, among others. One example of their use is in the reduction of takeoff and landing times at airports and the prevention of problems caused by wake vortex.
- Page 2 Required equipment: • 1 x pulse/pattern generator • 1 x infiniium oscilloscope • 2 x BNC cables Figure 2. The setup of a Keysight pulse generator and a Keysight infiniium oscilloscope What do we need to stimulate a laser with double pulses We need: •...
- Page 3 Now let’s set up the instrument as shown in the screenshots. Step 1: First, reset the instrument by pressing ‘Store/Recall’. Select ‘Set to defaults’ and choose ‘Yes’. Select the ‘Pulse’ mode. Step 2: Change frequency into period Figure 5. Step 2 and 3 by pressing the frequency button.
- Page 4 Step 5: Press the ‘Trig’ button, select source and choose internal. Step 6: Set ‘Int. Freq.’ up to 200 kHz. Figure 7. Step 5 and 6 Turn output 1 on by pushing ‘Out’ 1. Step 7: View the resulting double pulse on an infiniium oscilloscope.
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Page 5: Related Literature
For more information on Keysight Technologies’ products, applications or services, please contact your local Keysight office. The complete list is available at: www.keysight.com/find/contactus Find us at www.keysight.com Page 5 This information is subject to change without notice. © Keysight Technologies, 2019, Published in USA, October 29, 2019, 5991-2373EN...
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