Fiber optical sensor unit for detecting a mechanical force acting on a rail, comprising: an optical fiber; a fiber Bragg grating provided in the optical fiber which has a Bragg wavelength that depends on the mechanical force; a converter structure, wherein the converter structure has a signal amplification lever; and an edge filter for filtering the first part of the signal light, in particular wherein the edge filter has a filter characteristic line with a nominal slope of 8 % per nm related to the transmitted intensity or less, in particular between 2 % and 7 % per nm, in particular wherein a measuring range of axle loads of 200 kg to 50,000 kg that act on the rail is provided. Fig. 1
Rail measuring systems
31.10.2019
Patent
Elektronische Ressource
Englisch
IPC: | B61L Leiten des Eisenbahnverkehrs , GUIDING RAILWAY TRAFFIC / G01B MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS , Messen der Länge, der Dicke oder ähnlicher linearer Abmessungen / G01M TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES , Prüfen der statischen oder dynamischen Massenverteilung rotierender Teile von Maschinen oder Konstruktionen / B61K Andere Hilfseinrichtungen für Eisenbahnen , OTHER AUXILIARY EQUIPMENT FOR RAILWAYS / G01L Messen von Kraft, mechanischer Spannung, Drehmoment, Arbeit, mechanischer Leistung, mechanischem Wirkungsgrad oder des Drucks von Fluiden , MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE |