Thales Management & Services Deutschland Gmbh

Kai Schicker

Lars Hoffmann

Kassen Oldewurtel

Rainer Klemm

Florian Muschaweckh

Stefan Solleder

A device for fixing and positioning a rail monitoring element on a rail web of a rail having a rail foot, the rail web, and a rail head, includes a clamping device which can be fastened to the rail. A pressing ram is for pressing the rail monitoring element against the rail web. The pressing ram can be pressed against the rail web when the device is in the mounted state by means of force generated by a force element. A holder is for receiving the force element.

Device for fixing and positioning a rail monitoring element and use of said device

A rail-monitoring element includes a carrier on which a strain sensor is attached. The strain sensor may be an optical fiber having a fiber Bragg grating. The carrier has an adhesive layer for adhesive attachment to a rail having a thermally activatable or thermally curable adhesive. The adhesive layer has a heating element having contacts for receiving electrical energy. The rail-monitoring element can be installed more easily and in a manner which saves more energy.

Rail-monitoring element, method for mounting a rail-monitoring element, and method for manufacturing a rail-monitoring element

A method of mounting a rail monitoring member/element at a mounting location of a rail for rail traffic, in particular on a railway track, is disclosed. The rail monitoring member includes a strain sensor member with a carrier on which a strain gauge, being an optical fiber with a fiber Bragg grating, is fixed. The method steps include: determination of the temperature of the rail and/or rail monitoring member at the mounting location; checking whether the determined temperature is within a predefined temperature interval; providing heating or cooling application to the rail and/or rail monitoring member at the mounting location, if the determined temperature is not within the predefined temperature interval; positioning and adhesively fixing of the carrier of the rail monitoring member at the mounting location. The method can be carried out easily and allows reliable and accurate monitoring of the rail using a strain sensor member.

Method for mounting a rail monitoring element

A method for assembling a strain gauge arrangement for an axle counter, includes: a strain sensor element; a carrier, to which the strain sensor element is fastened; and a railroad track structure to be monitored. When the carrier is fastened to the structure at least a part of it is kept in an elastically deformed state. The carrier is embodied with a first carrier piece opposing a second carrier piece. The strain sensor element is fastened to the first carrier piece with a first fixing point, to the second carrier piece with a second fixing point, and to neither the first nor the second carrier piece with a central section between the fixing points. At least the part of the carrier is elastically braced by means of a bracing element for when adhesively bonding to the structure to be monitored. Thereafter the bracing element is removed.

Strain gauge assembly, particularly for an axle counter

A strain gauge arrangement for an axle counter has a strain sensor element, a carrier and a railway line structure that is to be monitored. At least one part of the carrier is maintained in an elastically deformed state by the structure when the carrier is secured to the structure. The carrier is formed from a first carrier piece and a second carrier piece, which lie opposite one another at a distance from one another. The strain sensor element has one first fixing point fixed to the first carrier piece, and one second fixing point fixed to the second carrier piece, and a middle section mounted between the fixing points which are not fixed to the first or second carrier piece. The strain gauge arrangement is simple to handle and a drop can be reliably detected and a strain state of the strain sensor element can be predetermined more easily.

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Mehltheuer, Germany

Kai Schicker