| 摘要 |
Method and apparatus for measuring the weight per unit area and providing cross-sectional, longitudinal, and diagonal profiles of density or thickness of moving manufactured sheet products. The apparatus comprises a stationary radiation source (2), an array of detectors (4), and electronic means (9, 10, 11) for processing the signals from the detectors (4) to obtain a total cross-sectional, longitudinal, and diagonal profile of density or thickness of moving manufactured sheet products. The energy output of the radiation source (2) remains constant during a measuring operation. The apparatus utilizes a line-up of individual radiation sources delivering constant radiation, and each individual radiation source generates an equal amount of radiation. The radiation transmitted from the individual radiation source is intercepted by the detectors (4) after penetrating the sheet product (3). The electronic means includes an interface unit, signal processor and numerical display units.
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