Method and device for detecting surface defects of nickel foam

Abstract

The invention provides a detection method and device for surface defects of nickel foam. The method includes: dividing the preprocessed surface image into a plurality of first sub-blocks by using horizontal segmentation or vertical segmentation, the size of the plurality of first sub-blocks is N / i x N / i, i is greater than or equal to 3 ; Perform surface defect identification on the plurality of first sub-blocks, if at least one first sub-block in the plurality of first sub-blocks is identified as a defective sub-block, then utilize horizontal or vertical segmentation to at least one first sub-block The sub-block is divided into a plurality of second sub-blocks to perform surface defect identification on the plurality of second sub-blocks, wherein the size of each second sub-block is M / j x M / j, and j is greater than or equal to 3. The detection method for surface defects of foamed nickel provided by the invention can quickly locate the position of defects on the surface of foamed nickel.

Description

technical field [0001] The disclosed embodiments of the present invention relate to detection technology, and more specifically, to a detection method and device for surface defects of nickel foam. Background technique [0002] Nickel foam is a new type of functional material obtained through a series of physical and chemical processes on nickel metal. As the base material for automotive batteries, nickel foam has a great impact on battery performance. The surface of nickel foam has a silver-gray metallic luster, and its shape is similar to a metal sponge. In terms of quality, it is required to have a smooth surface, no scratches, no cracks, no damage, no oil stains and no oxidation. [0003] However, during the preparation of nickel foam, due to factors such as raw materials and processing techniques (PVD, electroplating, sintering, etc.), the surface of nickel foam will be contaminated, indented, creased, nickel skin, cracks, scratches, missing plating, etc. Many differen...

AI Technical Summary

Problems solved by technology

This method has high labor intensity, low efficiency, strong subjectivity and high error detection rate

Due to the lag of quality inspection and analysis, it is also difficult to effectively optimize the production process of nickel foam on-line

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