High resolution temperature measurement of liquid stainless steel using hyperspectral imaging

Research output: Contribution to journalArticlepeer-review

23 Citations (Scopus)

Abstract

A contactless temperature measurement system is presented based on a hyperspectral line camera that captures the spectra in the visible and near infrared (VNIR) region of a large set of closely spaced points. The measured spectra are used in a nonlinear least squares optimization routine to calculate a one-dimensional temperature profile with high spatial resolution. Measurements of a liquid melt pool of AISI 316L stainless steel show that the system is able to determine the absolute temperatures with an accuracy of 10%. The measurements are made with a spatial resolution of 12 µm/pixel, justifying its use in applications where high temperature measurements with high spatial detail are desired, such as in the laser material processing and additive manufacturing fields.
Original languageEnglish
Article number91
Pages (from-to)1-13
Number of pages13
JournalSensors
Volume17
Issue number1
DOIs
Publication statusPublished - 5 Jan 2017

Keywords

  • hyperspectral imaging
  • temperature measurement
  • laser material processing

Fingerprint

Dive into the research topics of 'High resolution temperature measurement of liquid stainless steel using hyperspectral imaging'. Together they form a unique fingerprint.

Cite this