INODOCOAT

Sample Results from the Project

Specification for the CCD Thermal Vision System

The equipment is capable of monitoring a wide range of thermal spray processes, including plasma, flame, wire and detonation

Test of CCD camera in Plasma Spraying of Al₂O₃

The schematic diagram below shows the principle of thermal spraying, with the laser monitoring equipment focused on the hot stream of particles as they are spayed towards the substrate.

General scheme of CCD camera adaptation to Thermal Spray equipment

The Equipment Layout

The monitoring equipment is portable and easy to use.

Experimental set-up

Producing the Image

The picture below shows the relationship between the plasma jet in the thermal spray flame and the CCD camera

Spraying of Al₂O₃ with process monitoring by CCD camera

The Output Format

The equipement provides information on individual particles and how they react with the substrate being coated

Thermal image of Plasma Spraying of Al₂O₃ particles on steel substrate recorded by the advanced CCD camera.

Each particle is highlighted by the laser monitoring technique, so that its velocity and temperature can be collated

Image treatment: blob analysis, definition of particle diameter, speed and temperature

The system is fully computerised, with specially created software, so that it can sample the flame quickly, collate and analyse the spectrum of velocities and temperatures, and then provide the basis for a Quality Control feed back loop to adjust and control the spray parameters (such as gas pressure, powder feed rate, etc)

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