Optical circumferential deformation measuring system

The utility model discloses an optical circumferential deformation measuring system. The system comprises a sample winding coil which is wound on a tested sample, the two ends of the sample winding coil are connected with two ends of a marked rubber strip respectively, a flat plate support is arranged between the marked rubber strip and the tested sample, the side, located on the tested sample, of the flat plate support is in a concave shape, and one side, located on the marked rubber strip, of the flat plate support is a plane. Separation design is adopted, all units of the measuring system are in wireless connection and can be freely arranged, limitation of an interface and operation space does not exist, and signal interference does not exist. A common high-definition optical camera is adopted to collect deformation, no other electronic collection devices exist, no special interfaces exist, the system is high in generality and can collect a plurality of kinds of deformation at the same time, and a collection unit does not need to be additionally added. The sample winding unit is simple in whole machining, low in cost, small in size, and capable of being arranged on multiple cross sections. When the number of turns of the sample winding coil on the sample is larger than 1, circumferential deformation of the tested sample is amplified, and observation is convenient.