Method and apparatus for monitoring a flow field of a particle jet
AssigneeOseir Oy
InventorJussi Larjo
Life of this patent
Estimating the term…
Abstract
A method for controlling gas dynamic spraying includes providing a particle jet by using an accelerating nozzle, illuminating the particle jet with illuminating light pulses, capturing images of the particle jet illuminated with the illuminating light pulses, and determining one or more velocity values by analyzing the captured images, wherein the images are captured by using an imaging unit which includes imaging optics to form an optical image of an object plane on an image sensor by focusing light, wherein an optical axis of the imaging unit is inclined with respect to a central axis of the nozzle, and wherein the image sensor is inclined with respect to the optical axis such that the object plane is substantially parallel with a direction of movement of particles of the particle jet.
Claims18
A method for controlling gas dynamic spraying, the method comprising:
- providing a particle jet by using an accelerating nozzle,
- illuminating the particle jet with illuminating light pulses,
- capturing images of the particle jet illuminated with the illuminating light pulses, and
- determining one or more velocities of particles of the particle jet by analyzing the captured images,
- wherein the images are captured by using an imaging unit which comprises imaging optics to form an optical image of an object plane on an image sensor by focusing light, wherein an optical axis of the imaging unit is inclined with respect to a central axis of the nozzle, wherein the image sensor is inclined with respect to the optical axis such that the object plane is substantially parallel with a direction of movement of particles of the particle jet, and wherein the image sensor is inclined with respect to the optical axis such that the angle between the surface normal of the image sensor and the optical axis is substantially different from zero.
A cold spraying apparatus, comprising:
- an accelerating nozzle to provide a particle jet,
- an illuminating unit to illuminate the particle jet with illuminating light pulses,
- an imaging unit to capture images of the particle jet, and
- a data processing unit to determine one or more velocities of particles of the particle jet by analyzing the captured images,
- wherein the imaging unit comprises an image sensor, and imaging optics to form an optical image of an object plane on the image sensor by focusing light, wherein an optical axis of the imaging unit is inclined with respect to a central axis of the nozzle, wherein the image sensor is inclined with respect to the optical axis such that the object plane is substantially parallel with an average direction of movement of the particles of the particle jet, and wherein the image sensor is inclined with respect to the optical axis such that the angle between the surface normal of the image sensor and the optical axis is substantially different from zero.
Dependencies are inferred from the claim text.