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Case History
Our case histories in which the characteristic features of our solutions are outlined.

Flexibility translated into custom solutions, to speed up production processes, reduce errors and the resulting costs. Since 30 years working with a variety of companies and broad expertise in different sectors.

Our most successful machine vision systems

Machine vision system for spray geometry control

Spray geometry control with machine vision.

SprayCHECK is an automatic system for geometric control of the two-phase air-liquid flow produced by cosmetic dispenser nozzles, automotive injectors, aircraft injectors, irrigation nozzles, dental heads and more. Quality control of a shapeless object such as a spray is a complex problem for machine vision technology. This is especially true if quality control means true quantitative dimensional control, in a sufficiently accurate and repeatable manner, according to the principles of classical metrology.

 

 

The same quality control needs later emerged for geometric characterization of the flow produced by micropumps for cosmetic dispensers, nebulizers or other assimilated applications.


The investigation of spray geometry is carried out through the use of a structured light source that intersects the spray and produces a section or projection of the spray.

The images are acquired under appropriate environmental conditions using a machine vision system, which automatically makes the necessary measurements.

The same system provides for the detection of other physical quantities affecting the test, different for each product (pressures, temperatures, voltages, frequencies, etc.).

The SprayCHECK system is capable of performing the following tests on the spray:

  • Analysis of the horizontal SECTION of the spray by intersection with light plane produced by precision laser light blade;
  • Analysis of the vertical PROJECTION of the spray (longitudinal to the spray) by LED illumination displaying the entire spray vertically (or horizontally).

Control is carried out by the use of high-resolution monochromatic matrix cameras. A light-blade laser is used for illumination of the horizontal section, and linear LED illuminators are used for vertical projection.

 

Acquisition of images in horizontal section

  • Determination of droplet incidence and droplet equalization;
  • Determination of the (weighted) center of mass of the liquid section;
  • Determination of "iso-volume" profiles, i.e., profiles that in all directions leave out a certain percentage of liquid volume;
  • Determination of uniformity indices and miscellaneous reports.

Acquisition of images in vertical projection

  • Determination of droplet incidence and droplet equalization (as for horizontal sections);
  • Determination of the (weighted) center of mass of the liquid section;
  • Determination of "iso-volume" profiles (as for horizontal sections), i.e., profiles that horizontally in all image lines leave out a certain percentage of liquid volume;
  • Determination of average spray angle and average cone aperture;
  • Determination of uniformity indices and miscellaneous reports.

The facility is capable of making continuous sequences of images, and for each one it will perform:

  • Image acquisition;
  • Image processing with production of the related report;
  • Image saving, with or without the processing graphics superimposed.

At the end of the sequence, the software will automatically export all results to CSV files compatible with Microsoft EXCEL; these results can then be imported (manually) within spreadsheets to produce documentation forms, with tables and/or graphs, such as the graphs in the following images.

 

Case History