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PIV (Particle Image Velocimetry) recording
PIV (Particle Image Velocimetry)
recording
The frame straddling function enables recording two images with a very short time separation
that is used with PIV (Particle Image Velocimetry).
4-65
(00400)
PIV (Particle Image Velocimetry) is the technology to quantitatively measure the velocity distribution of a
flow from the movement of the particles based on the premise of following the flow of particles that are
mixed in a flow of liquid or gases.
Frame straddling is a method utilized for PIV, where a laser is employed to record two images with a very
short time separating the frames. With HX-7 frame straddling photography, one exposure start signal can
record two frames (1
st
frame and 2nd frame).
The timing to switch from the 1
st
frame to the 2
nd
frame is adjusted by changing the exposure time of the 1
st
frame using the shutter speed settings. The exposure time of the 2
nd
frame is automatically determined by
the frame size and cannot be changed.
The exposure pulse signal (EPO) output can be checked for the time of exposure.
Select either internal synchronization or EST synchronization for the camera.
If synchronizing the laser pulse timing using the camera EPO output signals as the standard, the GX
camera synchronization is set to “internal synchronization”. The frame rate is set with the camera.
If there are standard signals separate from the camera, set the synchronization signals to EST2, and the
timing for both the camera and laser pulses are synchronized to the standard signals. The frame rate
becomes the frequency of the standard signals.
Synchronizing recording with external signals (EST) (
A
Содержание ST-839
Страница 2: ......
Страница 13: ...This Booklet This Booklet 11 00400 About the notation in the text A Indicates the page referenced ...
Страница 16: ...Table of Contents 14 00400 11 Index Index 11 2 ...
Страница 23: ...Exterior View and Names of Each Part 1 7 00400 1 Lens mount A 2 3 Front and Back 1 ...
Страница 35: ...Connecting the Camera and Cables 2 7 00400 Diagram of Input Output Connections on the Rear Panel ...
Страница 45: ...Turning the Power ON OFF 2 17 00400 6 Connect the cable to the HX 7 ...
Страница 56: ...J PAD3 Operation 3 10 00400 ...
Страница 90: ...Lens Control 3 44 00400 Hold switch Temporarily disables operation from the J PAD3 ...
Страница 98: ...3 52 00400 ...
Страница 188: ...5 16 00400 ...
Страница 202: ...6 14 00400 ...
Страница 220: ...7 18 00400 ...
Страница 318: ...9 66 00400 ...
Страница 360: ...Figures Figures 10 42 00400 MEMRECAM HX 7 Camera Unit Dimensional Figure ...
Страница 361: ...Figures 10 43 00400 AC Adapter Dimensional Figure ...
Страница 362: ...10 44 00400 ...
Страница 363: ...11 1 00400 11 Index Index 11 2 ...
Страница 370: ...Index 11 8 00400 Y YC TIFF 7 14 Z ZOOM 5 4 6 5 ...