公开(公告)号：US20210239583A1

公开(公告)日：2021-08-05

申请号：US17052537

申请日：2019-04-24

Applicant: Valmet Automation Oy

Inventor： Markku Mäntylä ,  Jussi Graeffe ,  Anna-Leena Erkkilä

IPC: G01N3/20 ,  B65H23/04 ,  G01B11/16 ,  G01N33/34 ,  D21F1/48 ,  D21G9/00

Abstract: According to an example aspect of the present invention, there is provided a method, comprising: controlling suction with predetermined force in a known measurement area to a moving cardboard or paper web in a manufacturing process, detecting on-line measurement information on deviation of the moving cardboard or paper web in the manufacturing process caused by the suction with predetermined force in the known measurement area, and determining elastic modulus of the moving cardboard or paper web in the manufacturing process on the basis of the measured deviation.

公开(公告)号：US11204329B2

公开(公告)日：2021-12-21

申请号：US16422127

申请日：2019-05-24

Applicant: VALMET AUTOMATION OY

Inventor： Markku Mantyla ,  Jussi Graeffe ,  Pekka Jakkula

IPC: G01N21/86 ,  G01V3/08 ,  B65H7/10 ,  G01N21/31 ,  G01S17/02 ,  B65H7/14 ,  G01J5/10

Abstract: A method of measuring properties of a moving cellulose, paper or board sheet. A first parameter of a first resonance caused by the moving sheet in a frequency range 1 GHz to 25 GHz of electromagnetic radiation is measured. A second parameter of an electromagnetic signal transmitted between at least a pair of transceiver parts of a transceiver sensor located on opposite sides of the moving sheet through the moving sheet is measured in a frequency range 25 GHz to 1000 GHz. A minimum difference between the frequency ranges related to the first parameter and the second parameter being at least 5 GHz. Both the dry stuff content and the weight of water per unit of area are determined on the basis of the first parameter, the second parameter and available information related to a distance travelled by the electromagnetic signal.

公开(公告)号：US11828736B2

公开(公告)日：2023-11-28

申请号：US17052537

申请日：2019-04-24

Applicant: Valmet Automation Oy

Inventor： Markku Mäntylä ,  Jussi Graeffe ,  Anna-Leena Erkkilä

IPC: G01N3/20 ,  B65H23/04 ,  D21F1/48 ,  D21G9/00 ,  G01B11/16 ,  G01N33/34 ,  G01B11/06

CPC classification number: G01N3/20 ,  B65H23/044 ,  D21F1/48 ,  D21G9/0027 ,  G01B11/06 ,  G01N33/346 ,  B65H2511/23 ,  B65H2515/37 ,  B65H2553/10 ,  B65H2553/45 ,  G01N2203/0046 ,  G01N2203/0075 ,  G01N2203/0282

Abstract: According to an example aspect of the present invention, there is provided a method, comprising: controlling suction with predetermined force in a known measurement area to a moving cardboard or paper web in a manufacturing process, detecting on-line measurement information on deviation of the moving cardboard or paper web in the manufacturing process caused by the suction with predetermined force in the known measurement area, and determining elastic modulus of the moving cardboard or paper web in the manufacturing process on the basis of the measured deviation.