The invention relates to the technical field of construction material detection and aims to provide an acquisition
system and identification method of concrete surface initial crack information. According to the method, the image of the surface of a concrete material piece to be tested is shot by a
digital camera, then the
digital image is processed and analyzed through a
digital image matching method, finally the initial crack position of concrete is identified through a main
strain distribution map peak point, and the initial crack time of the concrete is judged through the time change rule of the peak point strain. According to the acquisition
system and identification method of concrete surface initial crack information, the influence of a
strain gauge size effect can be effectively avoided, a
strain gauge is not pasted to the surface of the concrete, and the initial crack position of the concrete surface can be accurately determined. All
test equipment of the method is reproducible, the initial crack information of the concrete material can be objectively, accurately and reasonably identified, according to the method, the concrete sample treatment is simple, the operation is simple, the
batch processing can be realized, a lot of manpower cost is saved, and the test cost is low.