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公开(公告)号：US5928475A
公开(公告)日：1999-07-27
申请号：US933161
申请日：1997-09-18
申请人： Lee Chase , John D. Goss , Graham V. Walford , John Preston
发明人： Lee Chase , John D. Goss , Graham V. Walford , John Preston
IPC分类号： D21H23/08 , G01G9/00 , G01N27/02 , G01N27/04 , G01N27/22 , G01N33/34 , D21F11/00 , G01R27/02
CPC分类号： D21H23/08 , G01G9/00 , G01N33/343 , Y10S162/06 , Y10S162/11
摘要： A system and method that combine an array of fast under wire water weigh sensors with a scanning system provides an accurate measurement of the entire sheet down to 1 in. by 1 in. resolution. Because CD profiles are obtained instantaneously, MD and CD variations are completely decoupled, even if CD profiles are taken at longer intervals apart. The technique allows monitoring the basis weight of a sheet of material that is formed in a process that employs a de-watering machine that includes a water permeable moving fabric supporting wet stock and a dry end which technique includes the steps of: a) positioning an array of water weight sensor elements (array) underneath and adjacent to the fabric wherein the array is positioned in a cross direction to the moving fabric; b) positioning a scanning sensor at the dry end to measure the dry basis weight of the sheet of material; c) operating the machine and measuring the water weights of the sheet of material with the array and measuring the dry basis weight of the sheet of material with the scanning sensor at the dry end; d) developing a functional relationship between water weight of the sheet as measured by the array and the basis weight of the sheet which is formed after being substantially de-watered; end; and e) periodically, adjusting the functional relationship using readings from the scanning sensor to compensate for variations due to process parameters. The technique can further include the step of correlating positional readings of the scanning sensor with measurements from the corresponding element in the array to obtain separate calibration for each individual element of the array and step e comprises adjusting the functional relationship obtained in step d and the calibration obtained in to compensate for variations due to process parameters.
摘要翻译： 将快速下线水重传感器与扫描系统结合的系统和方法可以将整个纸张的精确测量精确到1英寸×1英寸分辨率。 由于CD配置文件被即时获得，所以MD和CD的变化是完全解耦的，即使以更长的间隔分开进行CD配置文件。 该技术允许监测在使用脱水机的过程中形成的一片材料的基重，所述脱水机包括支撑湿料的透水性移动织物和干燥端，该技术包括以下步骤：a） 排列在织物下方并邻近织物的水重量传感器元件（阵列），其中阵列沿与运动织物交叉的方向定位; b）将扫描传感器定位在干燥端以测量材料片的干基重量; c）操作机器并用阵列测量材料片的重量，并用干燥末端的扫描传感器测量材料片的干基重量; d）通过阵列测量的片材的水重与在基本上脱水后形成的片材的基重之间形成功能关系; 结束; 和e）周期性地使用来自扫描传感器的读数来调整功能关系，以补偿由于工艺参数引起的变化。 该技术还可以包括将扫描传感器的位置读数与阵列中相应元件的测量值相关的步骤，以获得阵列的每个单独元件的单独校准，步骤e包括调整步骤d中获得的功能关系和校准 获得以补偿由于工艺参数引起的变化。
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公开(公告)号：US5315124A
公开(公告)日：1994-05-24
申请号：US856382
申请日：1992-03-20
CPC分类号： G21F5/02
摘要： A nuclear gauge for making measurements of traveling webs in continuous sheet-making processes includes an enclosure, an encapsulated nuclear source, and a wheel-like member mounted in the enclosure means for carrying the encapsulated nuclear source between two angularly-displaced positions. The first of the angularly-displaced positions is the position where the encapsulated nuclear source makes measurements of a web that travels past the gauge and the second position is the location where the encapsulated nuclear source faces a sidewall of the enclosure means at a location remote from the first position. The nuclear gauge also has an aperture which is formed through the enclosure for providing a window through which the encapsuled nuclear source, when located in the first position, can emit radiation onto a web that travels past the window.
摘要翻译： 用于在连续片材制造方法中测量行进幅材的核计量器包括外壳，封装的核源和安装在外壳装置中的轮状构件，用于在两个角度位移位置之间承载封装的核源。 角位移位置中的第一个是封装的核源测量行进通过量规的幅材的位置，而第二位置是封装的核源面向外壳的侧壁的位置，远离 第一名。 核计量器还具有通过外壳形成的孔，用于提供窗口，当位于第一位置时，封装的核源可以通过该窗口将辐射发射到穿过窗户的网上。
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公开(公告)号：US5029469A
公开(公告)日：1991-07-09
申请号：US247177
申请日：1988-09-21
摘要： A sheet tension measuring device is disclosed for measuring the tension of a moving sheet wherein a moving sheet is accurately positioned with pinchers at 2 spaced locations. The sheet is deflected between these pinchers from its nominal straight line path, and the amount of deflection and deflecting force are measured. The pinchers iron out any wrinkles in the sheet as the moving sheet slides through the pinchers. Sheet tension is computed based upon the measured deflection force and deflection distance. The resulting measurements of local sheet tension are used to correct nondestructive sheet strength measurements. A device and method are also disclosed for nondestructively determining the sheet strength and the extensional stiffness of the sheet in the machine direction and in the cross-direction.
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24.发明授权
公开(公告)号：US4991432A
公开(公告)日：1991-02-12
申请号：US388567
申请日：1989-08-01
申请人： Paul J. Houghton , Lee M. Chase , John D. Goss , Kent M. Norton
发明人： Paul J. Houghton , Lee M. Chase , John D. Goss , Kent M. Norton
CPC分类号： G01N3/08 , G01N33/346 , G01N2203/0282 , G01N2203/0623
摘要： A sensor for sensing a quality of a sheet, such as a paper sheet, related to elastic modulus and bending stiffness as it is being made including a sheet support in the form of a ring and a free running wheel, which depresses the paper into the center of the ring as the paper passes over it. A force transducer mounted to the wheel senses the force of the deflected paper on the wheel and provides a measure of a characteristic of the paper related to its elastic modulus and being stiffness. Alternatively, or in addition, a displacement sensor may be used to sense the distance that the sheet is displaced by the wheel into the ring. These factors, together with basis weight, thickness and paper velocity may be used to determine the strength of the paper on a continuous basis.
摘要翻译： 一种传感器，用于感测纸张的质量，例如纸张，其与弹性模量和弯曲刚度有关，其包括环形和自由运行轮形式的片状支撑件，其将纸压入 随着纸张越过环的中心。 安装到车轮上的力传感器感测到车轮上的偏转纸张的力，并提供与其弹性模量相关的纸张的特性和刚度的量度。 或者，或另外，位移传感器可以用于感测纸张被轮子移动到环中的距离。 这些因素，连同基重，厚度和纸张速度可以用于连续地确定纸张的强度。
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