Abb Research Ltd.

Abb Technology Ag

Abb Schweiz Ag

Hannes Merbold

Jacobus Lodevicus Martinus Van Mechelen

Deran Maas

Hubert Brändle

Daniele Angelosante

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.

Sensor system and method for determining paper sheet quality parameters

A method of characterizing a coated body by at least one coating parameter based on fitting to a physical model is provided. The coated body includes a substrate coated by a polymeric coating such as a paint film, the polymeric coating having at least one layer. The method is carried out by a sensor system in a non-contact manner, the sensor system including an emitter system for emitting THz radiation, a detector system for detecting THz radiation, and a processing unit operationally coupled to the emitter system and the detector system. The method includes: emitting, by the emitter system, a THz radiation signal towards the coated body such that the THz radiation interacts with the polymeric coating; and detecting, by the detector system, a response signal being the detected THz radiation signal having interacted with the polymeric coating.

Sensor system and method for characterizing a coated body

Growing community of inventors

Zurich, Switzerland

Hannes Merbold