公开(公告)号：US4950911A

公开(公告)日：1990-08-21

申请号：US299723

申请日：1989-01-19

申请人： Paul Williams ,  Thomas M. Domin ,  Gary N. Burk ,  Thomas O. McCanney ,  Steven M. Wilson

发明人： Paul Williams ,  Thomas M. Domin ,  Gary N. Burk ,  Thomas O. McCanney ,  Steven M. Wilson

IPC分类号： G01D3/02 ,  G01N21/89 ,  G01N21/956 ,  G06F17/40

CPC分类号： G01N21/89 ,  G01D3/022 ,  G01N2021/8874 ,  G01N2021/8887 ,  G01N2021/95615 ,  G01N2201/102

摘要： Apparatus for inspecting sheet material having known characteristics is disclosed. The apparatus comprises means for providing a plurality of pixel signals each having a magnitude representing the intensity of electromagnetic radiation received from a corresponding point on the sheet material. The apparatus also comprises signal processing means for comparing the magnitude of each one of the pixel signals to a corresponding reference range defined by the known characteristics of the sheet material and generating a characteristic signal. The characteristic signal includes an event signal for each of the magnitudes falling outside of the corresponding reference range and a data signal for each of the magnitudes falling within the range, wherein the data signal represents the magnitude of the pixel signal. The signal processing means also generates an address signal representing the point on the sheet material at which the characteristic signal is generated. The apparatus also comprises system processing means for storing the event signals and the corresponding address signals to provide an indication of deviation from the known characteristics of the sheet material.

摘要翻译： 公开了用于检查具有已知特性的片材的装置。 该装置包括用于提供多个像素信号的装置，每个像素信号具有表示从片材上的对应点接收的电磁辐射的强度的幅度。 该装置还包括信号处理装置，用于将每个像素信号的幅度与由片状材料的已知特性所限定的对应参考范围进行比较，并产生特征信号。 特征信号包括落在对应参考范围之外的每个幅度的事件信号和落在范围内的每个幅度的数据信号，其中数据信号表示像素信号的幅度。 信号处理装置还产生表示产生特征信号的片材上的点的地址信号。 该装置还包括用于存储事件信号和对应的地址信号的系统处理装置，以提供偏离片材的已知特征的指示。

公开(公告)号：US4954891A

公开(公告)日：1990-09-04

申请号：US300089

申请日：1989-01-23

申请人： Gary N. Burk ,  Thomas O. McCanney ,  Paul Williams

发明人： Gary N. Burk ,  Thomas O. McCanney ,  Paul Williams

IPC分类号： G01B11/30 ,  G01N21/86 ,  G01N21/89 ,  G01N21/892 ,  G03B15/02

CPC分类号： G01N21/8901 ,  G01N2021/8627

摘要： A light source module for use with a multi-camera array in a video surface inspection system includes a first light emitter which extends lengthwise across the entire width of a sheet to be inspected. Light from the first light emitter, which preferably comprises one or more fluorescent lamps, is received by a light guide and carried by the guide to uniformly illuminate a band extending entirely across the width of the moving sheet. The light guide comprises a transparent thermoplastic such that the light receiving end of the guide can be bent to define a plurality of sections which can be axially aligned with a corresponding plurality of fluorescent lamps. The fluorescent lamps may be powered by individual inverter ballasts which may be driven inturn by one or more variable dc power supplied to control the intensity of light emitted by the lamps. The light source module can also assist the inspection system in overcoming redundant data processing problems by providing second light emitters which illuminate the sheet in overlapping portions of the field of view of adjacent cameras of the multi-camera array to define data dividing points. Accordingly, duplicated data generated by the video cameras can be divided among the cameras at the defined data dividing points such that duplicated data is only processed once by the video surface inspection system.

公开(公告)号：US4801809A

公开(公告)日：1989-01-31

申请号：US72505

申请日：1987-07-13

申请人： Gary N. Burk ,  Paul Williams

发明人： Gary N. Burk ,  Paul Williams

IPC分类号： G01N21/86

CPC分类号： G01N21/86 ,  G01N2021/8645

摘要： Disclosed are sheet inspection apparatus and methods for rapid, repetitive measurement of a quality attribute in each of a plurality of measurement zones of a continuously-manufactured sheet of material, wherein measurement is based on the interaction of one or more radiation wavelength bands with one or more constituents of the sheet. Simultaneous resolution of measurement zones is provided in both scanning and non-scanning applications.

公开(公告)号：US4730492A

公开(公告)日：1988-03-15

申请号：US862297

申请日：1986-05-12

申请人： Gary N. Burk

发明人： Gary N. Burk

IPC分类号： D21F7/00 ,  D21G9/00 ,  G01H5/00 ,  G01N29/04

CPC分类号： D21G9/0009 ,  D21F7/00 ,  G01H5/00

摘要： Disclosed are apparatus and methods for producing electrical signals that can be used to measure the speed of ultrasound in a moving web of paper. The apparatus employs a hollow cylinder in which a plurality of transducers are positioned to contact the web. Power supplied to the cylinder through mercury slip is filtered by power conditioning circuitry in the interior of the cylinder, thus enabling the delivery of clean electrical pulses to the emitting transducers. Signals from the receiving transducers are delivered to voltage-to-frequency converter circuitry in the interior of the cylinder, and the resulting electrical frequency signals are converted to optical frequency signals. The optical signals are then communicated across an air gap to receptors which are external to the cylinder. Thus, signals from which measurements of the speed of ultrasound can be derived are provided substantially free from noise generated by transmission through slip rings.

摘要翻译： 公开了用于产生电信号的装置和方法，其可用于测量移动的纸幅中的超声波的速度。 该装置采用中空圆柱体，其中多个换能器定位成接触腹板。 通过水银滑动供应到气缸的功率通过气缸内部的功率调节电路进行过滤，从而能够将清洁的电脉冲传送到发射换能器。 来自接收换能器的信号被传送到气缸内部的电压 - 频率转换器电路，并且所得到的电频率信号被转换为光频信号。 然后，光信号通过气隙连接到在气缸外部的受体。 因此，提供可以导出超声速度的测量的信号基本上没有通过滑环传输产生的噪声。

公开(公告)号：US5082529A

公开(公告)日：1992-01-21

申请号：US499012

申请日：1990-03-27

申请人： Gary N. Burk

发明人： Gary N. Burk

IPC分类号： G01J3/46 ,  G01N21/86

CPC分类号： G01J3/46 ,  G01J3/465 ,  G01N21/86 ,  G01J2003/467 ,  G01N2021/8663 ,  Y10S162/11

摘要： The stack reflectance is predicted from an on-line, wavelength dependent measurement of the sheet reflectance and the on-line measurement of the sheet opacity at a wavelength interval. The stack reflectance Rst is then used to predict and/or control stack color, preferably by using the parameter K/S=(1-Rst.sup.2)/2 Rst where K is the dye absorption coefficient and S is the dye scattering coefficient.

摘要翻译： 叠层反射率是从片上反射率的在线波长相关测量和在波长间隔上的片材不透明度的在线测量来预测的。 然后，优选使用参数K / S =（1-Rst2）/ 2 Rst，其中K是染料吸收系数，S是染料散射系数，将叠层反射率Rst用于预测和/或控制堆叠颜色。

公开(公告)号：US5196715A

公开(公告)日：1993-03-23

申请号：US786318

申请日：1991-10-31

申请人： Gary N. Burk ,  Mark A. Miller

发明人： Gary N. Burk ,  Mark A. Miller

IPC分类号： G01N21/892

CPC分类号： G01N21/8921

摘要： An apparatus for detecting streaks in a moving sheet of material utilizes the signal generating and processing means of an existing spot/hole detection system which provides a series of spot measurement signals generated sequentially as a machine direction series of cross-machine sets and assigns a cross-direction location to each signal. Means are provided for calculating an exponential average of the signals for each of the cross-machine locations. This average is compared with a predetermined standard and an output signal, including a cross-machine location, is generated when the average exceeds the standard.

摘要翻译： 一种用于检测移动片材中的条纹的装置利用了现有点/空穴检测系统的信号产生和处理装置，其提供了顺序生成的一系列点测量信号作为机器方向系列的机器组，并分配十字 到每个信号的方向位置。 提供了用于计算每个跨机器位置的信号的指数平均值的装置。 将该平均值与预定标准进行比较，并且当平均值超过标准时，生成包括跨机器位置的输出信号。

公开(公告)号：US4944594A

公开(公告)日：1990-07-31

申请号：US187204

申请日：1988-04-28

申请人： Gary N. Burk

发明人： Gary N. Burk

IPC分类号： G01N21/47 ,  G01N21/86

CPC分类号： G01N21/4738 ,  G01N2021/4773 ,  G01N2021/8663 ,  G01N2201/067 ,  G01N2201/0833 ,  G01N2201/128

摘要： Apparatus (10) and methods for measuring dark and bright reflectances of translucent sheet material (2) are disclosed. The apparatus (10) comprises first optical means for illuminating one side of the sheet material (2) with a source of electromagnetic radiation. A portion of the radiation is transmitted through the sheet material (2) and another portion of the radiation is reflected by the sheet material. The apparatus (10) also comprises optical gating means (30) that is positioned adjacent the other side of the sheet material (2) in a fixed position relative to the first optical means. The optical gating means (30) absorbs substantially all of the transmitted portion of the radiation when switched to a dark state and reflects substantially all of the transmitted portion of the radiation back through the sheet material (2) when switched to a bright state. The apparatus (10) further comprises second optical means for collecting the reflected portion of the radiation and the portion of the transmitted portion of the radiation reflected by the optical gating means (30) and retransmitted through the sheet material (2) to provide a total reflectance. The total reflectance has a dark reflectance intensity when the optical gating means (30) is in the dark state and a bright reflectance intensity when the optical gating means is in the bright state. The apparatus also comprises sensing means (60), responsive to radiation collected by the second optical means, for providing a dark signal having a magnitude corresponding to the dark reflectance intensity and a bright signal having a magnitude corresponding the bright reflectance intensity. The dark and bright signals can be incorporated in known formulae to compute values for quality attributes of the sheet material (2) including opacity and color.