Non-contact online measurement method of aluminum ingot thickness

Abstract

The invention discloses a non-contact on-line measurement method for the thickness of an aluminum ingot. In the method, firstly, the modeling of the aluminum ingot mold is simplified, and a functional relationship between the width and thickness of the mold is constructed, so that the thickness that is difficult to measure in the horizontal direction is converted into Easy-to-measure width, the width information is collected by the image taken by the camera; then the RGB color model of the captured aluminum ingot image is converted into the HSV color model, and the color candidate area is extracted according to the S information in the HSV color model; then the original The color image is converted into a normalized grayscale image, and the normalized image is preprocessed and the grayscale morphological operation is used to detect the width of the aluminum ingot; finally, according to the function between the width of the aluminum ingot and the thickness of the aluminum ingot relationship to complete the measurement of the thickness of the aluminum ingot. The selection of the HSV color space in the present invention can identify the width of the aluminum ingot more quickly and stably, thereby realizing the non-contact measurement of the thickness of the aluminum ingot.

Description

technical field [0001] The technical solution of the invention relates to the field of metal thermal processing, in particular to a non-contact online measurement method for the thickness of an aluminum ingot. Background technique [0002] In the process of manufacturing aluminum ingots, the requirements for the thickness of the aluminum ingot are relatively high. Once it is too thick or too thin, the shape of the aluminum ingot will change, and eventually the aluminum ingot will be directly scrapped and cannot be used. Therefore, it has very important practical significance to measure the thickness of the aluminum ingot in real time during the aluminum ingot manufacturing process. Due to the high temperature of the aluminum ingot during the casting process and the limitation of the actual equipment, it is impossible to directly measure the thickness of the aluminum ingot. Therefore, the more common method of controlling the thickness of the aluminum ingot is to judge the th...

AI Technical Summary

Problems solved by technology

However, this thickness control method also has limitations: since the ranging plane of the laser rangefinder is the surface of the aluminum ingot, the aluminum ingot is still in a molten state at this time, and the surface heat radiation is very strong, which will radiate infrared rays and affect the laser ranging At the same time, because the mold is moving during the casting process, this movement is not smooth, which will cause the molten aluminum to shake, and the surface of the molten aluminum at this time cannot accurately reflect the final aluminum ingot The true thickness of the , so there will be unavoidable errors

Combining these problems, it is urgent to find a thickness measurement method that can solve the above problems, but there are few related researches on the thickness measurement of aluminum ingots

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