OPTICAL MEASURING DEVICE FOR DETERMINING TEMPERATURE IN A CRYOGENIC ENVIRONMENT AND WINDING ARRANGEMENT WHOSE TEMPERATURE CAN BE MONITORED

摘要

The invention relates to an optical measuring device for determining temperature in a cryogenic environment. The optical measuring device has at least one optical waveguide (20a, 20i) which is provided with at least one fiber Bragg-grating sensor (21), wherein said sensor (21) can be interrogated by means of a light signal. In addition, the proposed optical measuring device consists of a supply means for supplying the light signal to at least one optical waveguide (20a, 20i), as well as an evaluation means for determining the temperature value of a light signal emanating from at least one fiber Bragg-grating sensor (21). Thus, at least one line element (22) partially encloses at least one optical waveguide (20a, 20i) in the area of at least one fiber Bragg-grating sensor (21) in a force-fitting manner. Said line element features a larger coefficient for thermal expansion for cryogenic temperatures than does the at least one optical waveguide (20a, 20i). In addition, the invention relates to a winding arrangement of which the temperature can be monitored.