Multiplexed NIR spectroscopic Sensors and NIR spectroscopic Imaging: Two Solutions for Sensor based Waste Sorting in Comparison

Recently hyperspectral NIR imaging systems, which work without optical multiplexers and handle 256 tracks at scan rates of up to 330Hz, have been eveloped. However, they have a reduced dynamic range of 12 Bit and detect only the shortwave NIR spectral range up to 1.76m, which may limit the possible applications. At belt widths of up to 2 meters these new systems can be used for sorting standard plastics as well as plastic flakes >5mm.
The article compares the advantages and limitations of both systems and demonstrates the fields of use on the basis of practice-oriented examples.

Keywords:
Plastic, sorting, hyperspectral, multispectral, imaging, near infrared, NIR, sensor

1 Plastic identification with NIR
2 NIR-sensors
3 Identification of PET-bottles with different plastic labels
4 Combined NIR- and colour recognition with KustaMPL
5 Sorting of shreddered electronic waste (WEEE) with KustaMSI
6 Conclusion and prospects




Copyright: © Wasteconsult International
Quelle: Waste-to-Resources 2009 (Mai 2009)
Seiten: 9
Preis inkl. MwSt.: € 4,50
Autor: Arne Volland

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