Material web movement speed or web material properties determination method in which heat markings are applied to the material surface with a pulsed laser that are then detected using a temperature sensor

摘要

Method for measurement of the material properties or speed of movement of a material web in which heat markings (12) are applied at periodic intervals on the material web (10) with the markings then detected using a temperature sensor (13) placed to detect the markings on the web. The invention also relates to a corresponding device for method implementation. Said device has a laser (11) that is aimed at the material web and pulsed to create heat markings on the web.