| 摘要 |
<p>A sensor head for measurement of a film, comprising a guide surface (14) for the film, at least one sensor element (28, 30) integrated in the guide surface for measuring a property of the film, and a generator for generating an air cushion between the guide surface (14) and the film, said generator comprising a system for supplying a pressure medium, and a guide member (12) that is made of a porous material and forms at least a part of the guide surface (14) and is adapted to distributedly discharge the pressure medium into the air cushion, characterised in that the guide member (12) has a channel system (16, 18) that divides the guide surface (14) into a plurality of fields (20, 22) that, if not disconnected, are connected only by narrow lands, said channel system being configured for draining the pressure medium from the air cushion.</p> |
