Automatic detection device and method of geometric quality of arge-sized thin-plate metal workpiece

Abstract

The invention relates to an automatic detection device and method of the geometric quality of a large-sized thin-plate metal workpiece. An overall image and a distance of a thin-plate workpiece are collected at a detection position and the collected image and distance information are transmitted to an image processing unit; the image processing unit obtains the number of processing holes and central positions of all holes, identifies arc and segment pixels, determines the pixel types and the numbers of all types of pixels, and calculates workpiece thickness information; if the hole number, theworkpiece thickness and the hole types meet requirements, a local sensing unit collected a workpiece sequence image and transmits the image to the image processing unit; the image processing unit processes a local sequence image and identifies dimension information and position information of the obtained pixels; and if the pixel dimensions and positions meet requirements, a detection result is outputted. According to the invention, the original image of a to-be-detected workpiece is collected and obtained by means of macro-micro combination and quality detection of the large-sized workpieceis realized; the detection precision is ensured; the restriction on the workpiece dimension is eliminated; and the detection range and the detection precision are improved.

Description

technical field [0001] The invention relates to a workpiece geometric quality detection technology, in particular to an automatic detection device and method for the geometric quality of a large-size sheet metal workpiece. Background technique [0002] The modern manufacturing industry tends to be more and more characterized by "multiple varieties and small batches", and the sheet metal processing field has higher and higher requirements for production flexibility. The quality inspection of workpieces in the production process is very important. The workpiece geometric quality automatic detection device is applied in the metal sheet manufacturing production line. During the production process, the workpiece processing geometric quality is detected in real time. When the workpiece processing quality is detected to be out of tolerance, a warning message is issued in time to avoid the production of batch waste, which is beneficial Improve the production efficiency and automatio...

AI Technical Summary

Problems solved by technology

However, in terms of geometric quality inspection of large-size thin-plate metal workpieces (thin-plate metal workpieces with a plane size greater than 500mm*500mm), due to the constraints of large measurement dimensions and high measurement accuracy requirements, it has not been popularized. The existing detection devices require ultra-high High-resolution digital camera realizes high-precision detection, the price is relatively expensive, and the size of the detection workpiece is limited

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