Method for acquisition of continuous profile image of polyphase material

Abstract

The invention belongs to the technical field of acquisition of a profile image of a polyphase material, and relates to a method for acquisition of a continuous profile image of a polyphase material. An optimal-design grinding chamber having a profile made from a brittle material is adopted to cooperate with a grinding cutter for performing layer-by-layer dry grinding on a polyphase material test piece layer at a constant spacing; a continuous profile image of the polyphase material test piece is shot, and an image processing software is used for performing registration, standardization processing and pretreatment on the continuous profile image of the polyphase material test piece to obtain a standard usable continuous profile image of the polyphase material test piece. During acquisitionof the continuous profile image, registration of the profile image in a Z axis is taken into consideration, so that the continuous profile image with a relatively small interlayer spacing and comparatively high calibration degree is obtained. The image has the feature of a ''CT-simulative'' image, and the obtained true color image overcomes the defect of loss of information content of a CT-scannedgrayscale image. The method is simple and fast in image acquisition, is low in cost of image acquisition, and is convenient for application and popularization, and the information content of an obtained image is complete.

Description

Technical field: [0001] The invention belongs to the technical field of acquisition of cross-sectional images of multi-phase materials, and relates to a method for obtaining continuous cross-sectional images of multi-phase materials, which can quickly and accurately obtain continuous cross-sectional images of multi-phase materials with small intervals. Background technique: [0002] Multiphase material refers to the "composite" of different substances into one material. The material has phase interfaces because of the different quality, mainly including solid-solid, solid-liquid, liquid-liquid, gas-solid, gas-liquid and other phase interfaces. , all kinds of materials learn from each other in terms of performance, and produce synergistic effects, so that the comprehensive performance of the material can be optimized to meet various requirements for use. The multiphase composite material is composed of a continuous phase matrix and a phase reinforcement contained by the matrix...

AI Technical Summary

Problems solved by technology

[0004] However, CT scanning technology also has certain defects: the scanning layer has a certain thickness during CT scanning, and its interior contains substances of different densities. The CT value of each pixel only represents the average CT value of each substance in a unit volume, which is not true. value, this phenomenon is called partial volume effect; CT scan image is actually a gray-scale distribution image expressed in grayscale, not the real color image we see, which leads to the loss of a large amount of image information; for density For the same or similar substances, it is difficult for CT scanning technology to distinguish different phases, which greatly affects the identification and reconstruction of cross-sectional images of multi-phase materials; The quality of scanning images is affected, which leads to inaccurate analysis data; in addition, CT scanning equipment is expensive and the test cost is high, which limits the promotion and application of CT scanning technology in the field of civil engineering

[0006] The slicing method is to cut the multiphase material at a certain distance and expose its cut surface to obtain images. The slicing method can save the test cost, and the cutting section can truly present the structural information inside the multiphase material specimen. , but due to the limitation of cutting equipment, the distance between adjacent cross-sections is relatively large when acquiring continuous cross-section images of multi-phase materials, and it is difficult to obtain continuous cross-section images with small intervals; in addition, due to the relative instability between the camera and the cross-section As a result, the calibration of continuous section images is low, which brings large errors in 3D reconstruction

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