Radiation gauge for moving sheet material with movable source and segmented detector
    2.
    发明公开
    Radiation gauge for moving sheet material with movable source and segmented detector 审中-公开
    Strahlungsmessgerätfürbewegtes Folienmaterial mit bewegbarer Quelle und geteiltem Detektor

    公开(公告)号:EP0971215A1

    公开(公告)日:2000-01-12

    申请号:EP99109529.0

    申请日:1999-05-12

    发明人: Typpo, Pekka

    IPC分类号: G01G17/02 G01D5/48 D21G9/00

    CPC分类号: G01G17/02 G01D5/50 G01G9/005

    摘要: Measuring basis weight of a moving web in the cross direction scanner of a paper-making machine, an encapsulated nuclear source (33) of Promethium 147 is used because of its wide area of emission. To conserve space it is mounted on a vertical axis and moves in a horizontal plane parallel to the moving web from a stowed position where the source is shielded to an active position where the source emits through an aperture, through the moving web, and to a detector. The x-y array planar type detector uses four detector segments (1,2,3,4) symmetrically arranged around a center and compensates for belt direction misalignment, the belt driving the cross direction scanners, by mathematically manipulating the electrical signals from each detector to eliminate the error term. Also a standardization flag (36) is used.

    摘要翻译: 测量造纸机的横向扫描仪中的移动幅材的基重,由于其面积广泛,所以使用了Promiumium 147的封装核源(33)。 为了节省空间,它被安装在垂直轴线上并且在水平面中平行于移动腹板移动,从收集位置,其中源被屏蔽到活动位置,在该位置,源通过移动腹板射出,并且到达活动位置 探测器。 xy阵列平面型检测器使用四个围绕中心对称布置的检测器段(1,2,3,4),通过数学操作来自每个检测器的电信号来消除皮带方向不对中,带驱动横向扫描仪 错误项。 同样使用标准化标志(36)。

    IMPROVED DIFFERENTIAL COAT WEIGHT MEASUREMENT BY MEANS OF NUCLEAR OR X-RAY GAUGES
    4.
    发明公开

    公开(公告)号:EP2359105A1

    公开(公告)日:2011-08-24

    申请号:EP09832765.3

    申请日:2009-12-14

    IPC分类号: G01G23/01 D21H19/02 G01G17/02

    摘要: An improved differential coat weight technique employs a novel algorithm for measuring the weight of a coating material that has been deposited onto a sheet of substrate. The invention employs dual x-ray or nuclear gauges such that, even though the downstream sensor is never exposed to uncoated sheet substrate, imparting the downstream sensor with the ability to predict results that it would have yielded when measuring the uncoated sheet substrate, leads to the development of a coat weight calibration protocol from which the basis weight of the coating can be ascertained directly from measurements from the upstream and downstream sensors. No subtraction of results is required. Moreover, the two sensors do not need to be re-calibrated whenever the relative proportions of the coating and base substrate change. The technique is particularly suited for applications where the coating material and substrate are made of substances that have very different atomic numbers.

    Movement or position sensor
    5.
    发明公开
    Movement or position sensor 失效
    Bewegungs- oder Stellungsaufnehmer。

    公开(公告)号:EP0274242A1

    公开(公告)日:1988-07-13

    申请号:EP87310912.8

    申请日:1987-12-11

    IPC分类号: G01D5/50 G01P3/481

    CPC分类号: G01P3/481 G01D5/50

    摘要: A sensor for monitoring the movement of a rotating shaft (1). Mounted on the shaft (1) is a radiation source (5), the radiation from which passes to an associated radiation detector (3) in series of bursts, one per revolution of the shaft. Radiation enters the detector through a window (4) and acts to imbalance the detector, causing a pulse to appear in the potential of collector electrode (9) as the source (5) passes the window (4) on each revolution.

    摘要翻译: 用于监测旋转轴(1)的运动的传感器。 安装在轴(1)上的是辐射源(5),其辐射以一连串的脉冲串的形式传播到相关的辐射探测器(3),每转一圈。 辐射通过窗口(4)进入检测器,并且用于使检测器不平衡,当源(5)每转一次通过窗口(4)时,引起脉冲出现在集电极(9)的电位中。