| 摘要 |
In an apparatus on a spinning preparation machine, for example a flat card, roller card, draw frame, combing machine or the like, for ascertaining the mass and/or fluctuations in the mass of a fibre material, for example at least one fibre sliver, fibre web or the like, of cotton, synthetic fibres or the like, the fibre material is scanned mechanically by a feeler element the excursions of which are converted into electrical signals. In order to facilitate improved and more accurate measurement of the fibre in a way that is simple in terms of structure and installation, a contactless distance sensor is provided for detecting the position of the feeler element, the sensor being a sensor that measures distance using transmitted waves, and is connected to an electronic evaluating device.
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