SENSOR SYSTEM AND METHOD FOR DETERMINING PAPER SHEET QUALITY PARAMETERS

Jacobus Lodevicus Martinus van Mechelen (Inventor), Hannes Merbold (Inventor)

Research output: PatentPatent publication

Abstract

A non-contact sensor system and method are disclosed for determining paper sheet quality parameters such as caliper, basis weight and sheet moisture based on THz radiation. The method can include emitting, by an emitter system, a THz radiation signal towards paper sheet material such that the THz radiation interacts with the paper sheet material; detecting, by a detector system, a time and/or frequency dependent response of the THz radiation signal having interacted with the paper sheet material; determining model parameters of a physical model by optimizing the model parameters such that a predicted response of the physical model is fitted to the detected response, the model parameters being indicative of transmission and/or reflection coefficients at interfaces of the paper sheet material with surrounding media; and determining, from the determined model parameters, at least some of the paper sheet quality parameters.

Original languageEnglish
Patent numberUS2014277674
IPCG05B 19/ 418 A I
Priority date18/03/13
Publication statusPublished - 18 Sep 2014
Externally publishedYes

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