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1.发明公开ELECTROMAGNETIC FIELD PERTURBATION SENSOR AND METHODS FOR MEASURING WATER CONTENT IN SHEETMAKING SYSTEMS 失效电磁干扰场以及用于测量水含量的系统叶制作方法
公开(公告)号：EP0944827A1
公开(公告)日：1999-09-29
申请号：EP97953199.0
申请日：1997-12-12
发明人： CHASE, Lee , GOSS, John , WALFORD, Graham, V.
CPC分类号： G01N33/343 , D21H23/08 , G01G9/00 , Y10S162/06 , Y10S162/11
摘要： An apparatus for sensing three properties of materials: the conductivity or resistance, the dielectric constant, and the proximity of the material to the sensor portion of the apparatus. The apparatus includes a fixed impedance element coupled in series with the sensor portion of the apparatus between an input signal and ground. The sensor portion of the apparatus is an electrode configuration which includes at least two electrodes with a portion of the material residing between and in close proximity to the electrodes. The sensor exhibits a variable impedance resulting from changes in physical characteristics of the material. The fixed impedance element and the variable impedance of the sensor portion form a voltage divider network such that changes in impedance of the sensor portion result in changes in voltage on the output of the apparatus. The variable impendance of the sensor portion 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.
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2.发明授权METHOD AND APPARATUS FOR OPTICAL ALIGNMENT OF A MEASURING HEAD IN AN X-Y PLANE 失效方法和装置在坐标A区测量头的光学对准
公开(公告)号：EP0890078B1
公开(公告)日：2003-05-21
申请号：EP97922498.7
申请日：1997-03-19
发明人： CHASE, Lee , GOSS, John , ALGUARD, Mark , AXELROD, Steve , HERZLINGER, Peter , ANDERSON, Len , KING, Harriss
CPC分类号： G01B11/272 , G01G9/00
摘要： A two-dimensional position detector, in combination with dynamic z and/or flutter sensors, provides dynamic misalignment detection and correction of a measuring head, thereby allowing accurate determinations to be made of properties of a sheet material, such as basis weight.
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3.发明公开METHOD AND APPARATUS FOR OPTICAL ALIGNMENT OF A MEASURING HEAD IN AN X-Y PLANE 失效方法和装置在坐标A区测量头的光学对准
公开(公告)号：EP0890078A1
公开(公告)日：1999-01-13
申请号：EP97922498.0
申请日：1997-03-19
发明人： CHASE, Lee , GOSS, John , ALGUARD, Mark , AXELROD, Steve , HERZLINGER, Peter , ANDERSON, Len , KING, Harriss
CPC分类号： G01B11/272 , G01G9/00
摘要： A two-dimensional position detector, in combination with dynamic z and/or flutter sensors, provides dynamic misalignment detection and correction of a measuring head, thereby allowing accurate determinations to be made of properties of a sheet material, such as basis weight.
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