Aircraft structure test piece bending preventing and measuring device and measuring method thereof

The invention relates to an aircraft structure test piece bending preventing and measuring device which comprises multiple bending preventing and measuring mechanisms. A test piece is clamped through the multiple bending preventing and measuring mechanisms. Each bending preventing and measuring mechanism comprises a spherical roller, a pulley support, a first lead screw, a second lead screw and a sensor, wherein the spherical roller is arranged in the spherical surface of the pulley support and presses the surface of the test piece to be in contact with the test part, the pulley support is connected with one end of the sensor through the first lead screw, and the other end of the sensor is fixed to a bearing wall through the second lead screw. The aircraft structure test piece bending preventing and measuring device achieves the purposes of effectively preventing bending and conducting quantitative control on bending prevention by arranging the spherical rollers and arranging the load sensors at the connectin