Patent ID: 8244487

Claim:
A measuring system for tensile or compressive test, comprising: an image capturing apparatus capturing images along an axis; a set of mirrors comprising a first plane mirror extending in a first direction and a second plane mirror extending in a second direction, wherein the extensions of the first and second plane mirrors intersect at a specific point of the axis, wherein an angle between the extension of the first plane mirror and the axis and an angle between the extension of the second plane mirror and the axis are both a specific included angle, such that the first and second plane mirrors are symmetrical to the axis; and an object to be tested, disposed between the set of mirrors and the image capturing apparatus and orthogonal to the axis, wherein two extremities of the object have a first label and a second label, respectively, and a first mirror image of the first label and a second mirror image of the second label are generated through the first and second plane mirrors, respectively, wherein after the object is tensed or compressed, the image capturing apparatus obtains the displacement quantities of the first and second labels according to a third mirror image of the first label of the tensed or compressed object, a fourth mirror image of the second label of the tensed or compressed object, the first mirror image and the second mirror image.