CRACKING PROGRESS TRACKING DEVICE FOR CRACK TESTING DEVICE

摘要

PURPOSE:To observe a cracking generation position automatically by changing the image pickup position of an image pickup means for a test piece automatically according to picked-up image information on the cracking generation position of the test piece so that a specific point of the image pickup means is at the tip-side position of the cracking generation part. CONSTITUTION:The test piece 2 is fitted to the testing device 1. A video camera 3 which uses a solid-state image pickup element as the image pickup means for picking up an image of the cracking generation part of the test-piece 2 is fitted to a three-axial pulse stage 4 as a position changing means for changing the image pickup position for the test piece. The controller 5 for the three-axial pulse stage 4 is controlled by a crack tracking control means 101 according to the detection information of the cracking position detecting means 100 which detects the cracking position according to the image pickup information of the video camera 3 according to the detection information of the cracking position detecting means 100 so that the center of the image pickup visual field of the cracking position detecting means 100 and video camera 3 as a specific point of the visual field is at the tip-side position of the cracking generation part of the test piece 2.