Pore recognition is used for the recognition of a premature unwanted substrate modification. This technique must be applied in many fields where machine components etc. are exposed to the danger of corrosion resp. other factors causing failure. Pore recognition is capable to inspect the coating of a substrate deeply. It is especially important for the integrity monitoring of protection coatings and represents thus an essential part of quality assurance. Pore recognition also plays an important role in the assessment of welding results.
To perform pore recognition, pore search devices are used.
These devices emit an impulse tension. There are several procedures for pore recognition that are considered reliable, among which:
the wet sponge method. Through this method a low tension is produced and directed into a wet sponge. If you move the sponge over a non-compliant part of the substrate surface, the fluid will penetrate to the substrate. This way the electrical circuit is closed and the device will emit a signal tone.
UV pore recognition. This method works with UV light. The devices using this technology identify fluorescent non-coated areas as places with pores.
SmartRay, on the contrary, uses high-speed lasers and its WeldVision(tm) technology to recognise pores in automated processes. Besides the measurement of the seam geometrical features by means WeldVision, the technology is used especially in automated areas to precisely detect typical seam faults like surface pores, holes, margin grooves and not filled end craters.