CROSS-SECTIONAL AREA MEASURING DEVICE FOR TENSILE TESTING OBJECT

摘要

The purpose of the present invention is to enable, for a testing object set in a tensile testing machine, contactless measurement over time of the cross-sectional area, which changes during tensile testing. The cross-sectional area measuring device 10 for a tensile testing object is provided with a distance measurement means 13 for finding each internal distance Rn, which is the distance from the origin point O positioned at the center of a predetermined cross-sectional region A of a testing object T to a plurality of positions Pn at the peripheral edge portion of the cross-sectional region A, and a data processing means 14 for finding the area of the cross-sectional region A on the basis of each internal distance Rn found by the distance measurement means 13. The area of the cross-sectional region A, which deforms by tensile testing, is found over time by the data processing means 14 with the testing object T set in a tensile testing machine 11.