Articles | Volume 6, issue 1
J. Sens. Sens. Syst., 6, 9–18, 2017
https://doi.org/10.5194/jsss-6-9-2017

Special issue: Sensors and Measurement Systems 2016

J. Sens. Sens. Syst., 6, 9–18, 2017
https://doi.org/10.5194/jsss-6-9-2017
Regular research article
10 Jan 2017
Regular research article | 10 Jan 2017

Ultrasound tomography for inline monitoring of plastic melts

Norbert Halmen et al.

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Short summary
An ultrasound process tomography system has been developed, which enables the imaging of the local filler distribution in plastic melts. The objects investigated were extruded rods made of polypropylene (PP) with radial filler gradients. During extrusion, sound velocity and attenuation of the plastic melt were determined and processed via a modified reconstruction algorithm according to Radon transform into 2-D sectional images.