Metal scrap sorting system
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United States of America Patent
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Apr 8, 2003
Grant Date -
Feb 20, 2003
app pub date -
Jun 15, 2001
filing date -
Feb 16, 1996
priority date (Note) -
Expired
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Abstract
A system for sorting randomly positioned, irregularly shaped scrap metal particles on a moving conveyor employs laser-induced breakdown spectroscopy (LIBS), and includes an image detector for locating the particles as they path through a predefined viewing area, a position detector for detecting movement of the conveyor, a laser system for providing laser pulses, a scanner assembly for directing the pulses to selected locations within a target area, a light collector, a light distribution and spectral analyzer for isolating and measuring at least one selected band from the collected light, a separator, and suitable logic for identifying the particles, monitoring their position, monitoring the output of the laser and, operating the scanner assembly to direct the pulses to the identified particle. The spectral data is then analyzed, each particle is categorized, and thereafter sorted.
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