SAB safety airbag size visual measurement method

Abstract

The invention relates to an SAB safety air bag size visual measurement method. The method comprises the steps of collecting an optical image of an air bag sample piece; performing tilt correction on the optical image; constructing a linear smoothing filter for filtering, and removing the high-frequency components and the sharpening details; extracting the edges by adopting the Canny edge detectionand the morphological closed operation; accurately positioning a target area according to the characteristics of length-width ratio, area and the like; fitting the outer contour by adopting a least square straight line fitting method, and carrying out visual measurement according to a point distance measurement principle; measuring the pre-stitching line spacing accurately by combining a gray histogram and a projection method. The measurement method can be applied to a production line, and compared with the prior art, the whole system is more portable and higher in automation degree, and thedetection efficiency can be greatly improved. Compared with the manual detection, the randomness of errors is small, the errors are relatively smaller, the long-time stable measurement and analysis can be achieved, the fatigue is avoided, and a large amount of labor force can be saved.

Description

technical field [0001] The invention relates to a method for visually measuring the size of a SAB safety airbag. Background technique [0002] Since the 21st century, the automobile industry has developed rapidly. As another safety aid after the seat belt, the SAB airbag occupies an important position in modern automobiles, and its appearance greatly reduces the death rate. Therefore, for the airbag of the safety auxiliary device, its production process needs to ensure its accuracy and safety, so as to achieve the expected auxiliary safety design function. The traditional quality inspection of parts is mainly done manually or with some kind of auxiliary machine. Profilers, electromechanical dial gauges, universal tool microscopes and calipers are commonly used contour size inspection tools. However, the condition of manual detection is limited by the physical condition and working status of the operator. In the long-term and large-scale production mode, manual inspection ...

AI Technical Summary

Problems solved by technology

However, the condition of manual detection is limited by the physical condition and working status of the operator

In the long-term and large-scale production mode, manual inspection has shown great disadvantages. Due to the high labor intensity and high false detection rate, it greatly limits the improvement of production efficiency and product quality, resulting in unqualified products. Products flowed into the subsequent production and processing process, causing great accidents, which caused the traditional detection methods to be unable to meet the needs of modern industrial production. It is necessary to introduce an automatic detection technology, which can not only reduce labor costs but also achieve strict product quality. control

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