| 摘要 |
The present invention provides a sensing system and method adapted for use in monitoring and detecting features of a web for manufacturing. The sensing system has an energy source adapted to project an energy beam onto the web and a sensor positioned relative to the web and the energy source to sense attenuation of the energy beam from the energy source to detect, locate, identify, or measure the web or its features. The method includes passing the web through a light from a light source, measuring attenuation of the light from the light source with an optical sensor, and identifying an optical signature as a function of attenuation for characterizing the web and/or its feature.
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