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公开(公告)号：EP1108085B1
公开(公告)日：2009-07-15
申请号：EP99916415.5
申请日：1999-04-06
发明人： GOSS, John, D. , CHASE, Lee
CPC分类号： D21H23/78 , D21F7/06 , D21G9/0009 , G01G9/00 , G01G17/02 , G01N33/346
摘要： A sensor imbedded rolle (40) for detecting changes in properties of a material and a measurement apparatus including a fixed impedance element coupled in series with a variable sensor imbedded roller (40) between an input signal and a reference potential is described. The sensor (41), which includes an electrode configuration, is embedded into a roller (40) such that when the roller rotates the sensor contacts the material being measured and the sensor's impedance varies. The variable impedance of the sensor relates to changes in property of the material being sensed which can then be related to changes in other physical characteristics of the material, such as weight, chemical composition, and temperature. Sensor imbedded rollers (40) can be placed in a sheetmaking machine to measure the pre-formed and post-formed paper product.
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2.发明授权
公开(公告)号：EP1137845B1
公开(公告)日：2008-01-09
申请号：EP99917415.4
申请日：1999-04-12
发明人： GOSS, John, D. , CHASE, Lee , HU, Hung-Tzaw , PRESTON, John
CPC分类号： D21G9/0027 , D21F7/003 , Y10S162/10 , Y10S162/11
摘要： Significant improvements in papermaking control can be achieved by employing an array of sensors that are positioned underneath the wire of the machine to measure the conductivity of the aqueous wet stock. The conductivity of the wet stock is directly proportional to the total water weight within the wet stock; consequently, the sensor provides information which can be used to monitor and control the quality of the paper sheet produced. Because CD water weight profile is obtained practically instantaneously, the MD and CD variations are essentially decoupled. Quality improvements to the sheet fabricated will be achieved by providing fast control of the actuators on the machine and by tuning components on the machine to eliminate the sources of variations. Further, the dry stock weight of a sheet of wet stock that is resting on a water permeable moving wire of the papermaking machine can be made employing a water weight sensor element that is positioned adjacent to the wire and that generates signals indicative of the water weight of the sheet of wet stock on the wire. Moreover, the moisture level cross-direction (CD) profile of a sheet of material that is produced can also be measured.
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公开(公告)号：EP1021729B1
公开(公告)日：2007-05-09
申请号：EP99922961.0
申请日：1999-05-11
发明人： WATSON, John D. , HAGART-ALEXANDER, Claud , GOSS, John, D. , PRESTON, John, G. , HU, Hung-Tzaw , DUDAS, Laslo
CPC分类号： D21G9/0027 , D21D1/002 , D21F1/08 , Y10S162/06
摘要： System and method for producing paper are provided. The system controls formation of wet stock comprising fibers on a moving water permeable wire (7) of a de-watering machine that has means for supplying the amount of pulp from at least one source, means for adding an amount of non-fibrous additives to the wet stock, a refiner (20) that is subject to a variable load and a headbox (1) having at least one slice (11), wherein each slice (11) has an aperture through which wet stock is discharged onto the wire (7).
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公开(公告)号：EP1117867B1
公开(公告)日：2006-09-13
申请号：EP99917308.1
申请日：1999-04-13
CPC分类号： D21G9/0027 , Y10S162/11
摘要： A system of providing on-line turbulence measurements in a papermaking machine. The measurements are used to perform on-line adjustments to turbulence-inducing and adjusting elements in the papermaking machine to optimize final sheet product quality. Turbulence measurements are obtained using water weight sensors (23) in the wet end of the papermaking machine, specifically, under wire water weight measurements. Water weight readings are correlated to turbulence intensity levels. A turbulence processing sensor (25) sorts accumulated water weight measurement readings into intensity level intervals to obtain turbulence measurements or a turbulence profile. The trubulence measurements or profile is provided to a machine element controller (26) which uses the measured turbulence information and target turbulence information to generate control signals. Water weight sensors can obtain independent machine direction (MD) and cross machine direction (CD) water weight measurements and consequently independent turbulence measurements can be determined so that turbulence can be controlled in both directions. Machine elements are controlled so that turbulence remains uniform across the CD and so that the MD turbulence profile is optimized to resemble a target profile.
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