Abstract:
Eine Sicherheitsgurt-Einrichtung für ein Kraftfahrzeug weist ein Gurtband (30), welches mittels Befestigungseinrichtungen mit dem Fahrzeug verbunden ist, auf. Es wird vorgeschlagen am oder im Gurtband (30) wenigstens einen Lichtleiter (10) vorzusehen, welcher mit einem lichtaussendenden Element optisch gekoppelt ist. Diese Anordnung kann sowohl zu Messzwecken betreffend den Zustand des Gurtbandes als auch zur Informationsübermittlung genutzt werden.
Abstract:
An apparatus and method for determining a tension in a target strand (11) , e.g. a yarn is disclosed. The method and apparatus provides a non-contact way for determining tension in any type of elongate element simply and efficiently by means of an optical ssensing head (14), e.g. of the CD linear array type.
Abstract:
The invention relates to a process of contactless monitoring the tension in an optical fibre and to a tension meter which enables contactless measurement of the tension in a bare and in a coated optical fibre. By measuring the retardation induced by the birefringence of an optical fibre by means of a polarised light beam incident onto the fibre at an angle between about 10 DEG and 25 DEG to the detection optical axis it is possible to accurately measure tensions over a wide range, i.e., from less than about 10 g to about 450 g included. The method enables monitoring the tension during the ramp-up of the drawing process and is particularly advantageous for the control of the drawing tension in manufacturing of NZD, multimode or special fibres. Furthermore, the method allows to achieve an accurate monitoring of the tension both on a bare and on a coated fibre.
Abstract:
Ein Tensiometer (T) zur Messung der Spannung in fadenförmigem Material weist einen mit einem eingespannten Torsionselement (F) verbundenen Fadenarm (D) und eine opto-elektronische Abtastvorrichtung (A) auf, wobei die Abtastvorrichtung (A) die Torsion des Torsionselements (F) unter der Fadenspannung mit einem lichtpositionssensitiven Detektor (P) auf optischem Wege vergrössert abgreift.
Abstract:
The invention relates to a process of contactless monitoring the tension in an optical fibre and to a tension meter which enables contactless measurement of the tension in a bare and in a coated optical fibre. By measuring the retardation induced by the birefringence of an optical fibre by means of a polarised light beam incident onto the fibre at an angle between about 10 ° and 25 ° to the detection optical axis it is possible to accurately measure tensions over a wide range, i.e., from less than about 10 g to about 450 g included. The method enables monitoring the tension during the ramp-up of the drawing process and is particularly advantageous for the control of the drawing tension in manufacturing of NZD, multimode or special fibres. Furthermore, the method allows to achieve an accurate monitoring of the tension both on a bare and on a coated fibre.
Abstract:
The roller is rotatably mounted about its axis and comprises a hollow, cylindrical roll face (11), a ring (13) and two hollow shafts (12, 12'). The roller is provided with a force measuring fibre optical device which uses the double refraction in an optical fibre subjected to a lateral force. The optical fibres of the measuring device form coils (14, 15, 16), each having at least one turn (5'a, 5'b, 5'c) about the cylindrical roll face.