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    • 73. 发明授权
    • Apparatus and method for inspecting sheet material
    • 用于检查片材的装置和方法
    • US4950911A
    • 1990-08-21
    • US299723
    • 1989-01-19
    • Paul WilliamsThomas M. DominGary N. BurkThomas O. McCanneySteven M. Wilson
    • Paul WilliamsThomas M. DominGary N. BurkThomas O. McCanneySteven M. Wilson
    • G01D3/02G01N21/89G01N21/956G06F17/40
    • G01N21/89G01D3/022G01N2021/8874G01N2021/8887G01N2021/95615G01N2201/102
    • 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.
    • 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。