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US 2019/0376998 A1Published application
Stereo Particle Image Velocimetry (PIV) System for Long Term Coastal Ocean Deployment
AssigneeThe Government of the United States of America, as represented by the Secretary of the Navy
InventorsJoseph Calantoni, Edward Braithwaite, Callum Gray, Sean Griffin
Life of this patent
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Abstract
Systems and methods are provided for making in-situ measurements of the sea bed 3 component fluid velocity field and sediment motion across a range of real ocean conditions using particle image velocimetry (PIV). A PIV system in accordance with an embodiment of the present disclosure can include a camera to capture images of the particles in motion, a laser to generate a laser sheet for illuminating the particles, and a synchronizer to act as an external trigger for the laser and the camera.
Claims20
A particle image velocimetry (PIV) device, the PIV device comprising:
- a plurality of legs;
- a turntable coupled to the plurality of legs;
- a laser enclosure coupled to the turntable, wherein the laser enclosure is configured to enclose:
- a multi-faceted rotating mirror configured to generate a laser sheet based on a first reflected laser beam, wherein the laser sheet is configured to illuminate a plurality of particles in a medium surrounding the PIV device,
- a laser configured to generate a first laser beam,
- a first mirror configured to reflect the first laser beam to the multi-faceted rotating mirror, thereby generating the first reflected laser beam,
- a second mirror configured to receive a portion of the laser sheet and to generate a second reflected laser beam, and
- a sensor device configured to receive the second reflected laser beam;
- a camera enclosure coupled to the turntable, wherein the camera enclosure is configured to enclose a camera, and wherein the camera is configured to:
- detect backscatter reflected from the plurality of particles, and
- generate an image based on the backscatter;
- and
- a control module enclosure configured to enclose a control module, wherein the control module is coupled to the sensor device and the camera, and wherein the control module is configured to synchronize the laser and the camera.
10 more elements
A device, comprising:
- a laser, enclosed by a first pressure vessel, wherein the laser is configured to generate a laser beam that illuminates a plurality of particles in a medium surrounding the device;
- a camera, enclosed by a second pressure vessel, wherein the camera is configured to:
- detect backscatter reflected from the plurality of particles, and
- generate an image based on the backscatter;
- and
- a control module, coupled to the laser and the camera, wherein the control module is enclosed by a third pressure vessel, and wherein the control module is configured to synchronize the laser and the camera.
3 more elements
A system for particle image velocimetry (PIV), the system comprising:
- an particle image velocimetry (PIV) device located below water, the PIV device comprising:
- a plurality of legs;
- a turntable coupled to the plurality of legs;
- a laser enclosure coupled to the turntable, wherein the laser enclosure is configured to enclose:
- a multi-faceted rotating mirror configured to generate a laser sheet based on a first reflected laser beam, wherein the laser sheet is configured to illuminate a plurality of particles in a medium surrounding the PIV device,
- a laser configured to generate a first laser beam,
- a first mirror configured to reflect the first laser beam to the multi-faceted rotating mirror, thereby generating the first reflected laser beam,
- a second mirror configured to receive a portion of the laser sheet and to generate a second reflected laser beam, and
- a sensor device configured to receive the second reflected laser beam;
- a camera enclosure coupled to the turntable, wherein the camera enclosure is configured to enclose a camera, and wherein the camera is configured to:
- detect backscatter reflected from the plurality of particles, and
- generate an image based on the backscatter;
- and
- a control module enclosure configured to enclose a control module, wherein the control module is coupled to the sensor device and the camera, and wherein the control module is configured to synchronize the laser and the camera.
- an umbilical cord coupled to the PIV device, wherein the umbilical cord is configured to send power and data to the PIV device;
- and
- a command center device, coupled to the umbilical cord, wherein the command center device is located above water.
14 more elements
Dependencies are inferred from the claim text.