Apparatus for measuring thermal growth and method for the same

摘要

The present application relates to a thermal-expansion measuring device, and a thermal-expansion measuring method. According to an embodiment of the present invention, a thermal-expansion measuring device includes: a plurality of distance measuring sensors fixated at preset measurement spots, measuring a distance to a casing of a gas turbine compressor to obtain each displacement value; a supporting unit supporting the distance measuring sensors to fixate the distance measuring sensors at the preset measurement spots; a strain gauge attached to the supporting unit, measuring the extent of thermal expansion of the supporting unit transformed by heat generated by the gas turbine compressor to obtain a strain value; and a control unit generating an external profile of the casing based on the displacement value and the strain value.