Spray Pattern Measurement Systems are used for characterization of many types of spray including: nasal / MDI (metered dose inhaler), agricultural, water, paint, fuel injectors and domestic aerosols. Spray patternation systems capture images of the spray and calculate its pattern, cone angle / plume geometry and time evolution. Optional software and hardware allow droplet size measurement and velocity measurement.
Have you ever wondered what shape the spray or aerosol you have really produces? For a variety of reasons, metered dose inhalers (mdi), nasal sprays and fuel injectors need characterization. Typically analysis of cone angle / plume geometry, spray pattern, ellipticity, duration, time history, density etc. is required to pass engineering and regualtory standards.
Oxford Lasers has developed a number of imaging systems for aerosol characterization that allow measurement of all these parameters using image analysis.
For cone angle / plume geometry analysis of an aerosol or spray a laser lightsheet slices through the plume and a high speed movie is taken. Images from the movie are combined and the cone angle / plume geometry measured.
A sample composite image is shown above for a metered dose inhaler (mdi) with cone angle marked
For ellipticity / pattern characterization the laser lightsheet is repositioned and again a high speed movie is taken.
Images of the aerosol plume are combined and an ellipse is fitted to the resulting image providing a measurement of the spray pattern.
A sample composite image, with fitted ellipse marked, is shown.
In addition to providing quantitative data, the Envision systems can provide images of the break-up and droplet formation process. This can provide an extremely valuable insight into the process and aid product develpoment and troubleshooting.
Characterizations of:
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