System and a method for detecting material parameters
AssigneeImego Aktiebolag
InventorsVessen Vassilev, Borys Stoew, Gert Andersson, Jakob Blomgren
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Abstract
A detecting unit is provided, including a transmitter arranged to emit electromagnetic radiation, having a frequency in the range of 0.1 to 10 THz, towards a paper web moving in a printing unit; a receiver arranged to receive electromagnetic radiation being transmitted through or reflected by the paper web and to create a signal representing the received radiation; and a controller having an input channel for receiving the signal and a calculating unit for determining a measure relating to the properties of the paper web from the signal.
Claims11
A detecting unit for measuring properties of a paper web moving in a printing unit, comprising:
- a transmitter arranged to emit electromagnetic radiation, having a frequency in the range of 0.1 to 10 THz, towards the paper web moving in the printing unit;
- a receiver, arranged to receive electromagnetic radiation being transmitted through or reflected by said paper web and to create a signal representing the received radiation;
- and
- a controller, having including an input channel for receiving the signal, and a calculating unit for determining a measure relating to the properties of the paper web from the signal.
A method for detecting the water content of a moving paper web in a printing unit, comprising:
- emitting electromagnetic radiation having a frequency in the range of 0.1 to 10 THz towards the paper web moving in the printing unit;
- receiving electromagnetic radiation being transmitted through or reflected by said paper web;
- creating a signal representing the received radiation;
- and
- determining a measure relating to the properties of the paper web from the signal.
Dependencies are inferred from the claim text.