| 摘要 |
Described is a method of measuring the thickness of paste-like or dough-like material on a moving surface. A movably mounted measurement roller is laid on the layer and, while the surface covered by the layer moves past, the distance the roller is displaced at right angles to the direction of motion of the surface is determined by means of a sensor which generates an output signal. One parameter of this output signal is functionally related to the magnitude of the measurement-roller displacement, i.e. the thickness of the layer. In order to maintain precision and avoid the layer being measured being wound on the measurement roller, a pre-defined braking force is exerted on the roller. Apparatus comprising at least one measuring roll (32) being movable crosswise to the moving direction of the surface, such as the cylindrical surface of a roller (5) of a roller mill (WW) to which there is assigned an electronic sensor (34) detecting their movements and/or positions at least with respect to their height over the roller (5) whilst a brake device (37) is assigned to a respective measuring roll (32) and the braking force thereof is dependent upon the velocity of the respective roller (5), optionally the measuring roller.
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