TEMPERATURE SENSING

摘要

A temperature sensor array comprises an optical fibre (16) on which are a plurality of Bragg gratings (18) on respective spaced apart portions of the fibre. Each portion is in a housing (14) which freely houses the said portion substantially without axial strain on the fibre within the housing and which also isolates the grating from strain imposed on the fibre outside the housing. Thus substantially only changes in temperature affect the Bragg grating of that portion. The array may be used to detect and control the temperature of a tool (12) for forming a composite component amongst other uses.