| 摘要 |
<p>Device for the determination of the amount of substance or the density of fibre structures, which utilises the elastic properties of the fibre material (5). By means of a sphere (8) which is positioned in a conical opening (9) in the duct (6) which holds the fibres and which presses on the fibres with a part of its surface, a nozzle (12) is throttled, so that the pressure on the nozzle (12) represents a measure for the force on the sphere (8). This pressure is in a definite relationship to the fibre pressure on the sphere (8) and can be measured with a pressure measuring device (17) and transformed into an electrical signal by means of a normal commercially available converter. A small groove (19) in the wall of the duct behind the sphere (8) avoids the attachment of fibres between the sphere (8) and the opening (9). Fig. 5</p> |
