Contour line quality detection method

Abstract

The invention relates to the measurement technical field, in particular to a detection method for measuring product contour line combining a photoelectric instrument. The method includes the following steps: inputting a standard graph into a computer, reading corresponding point or line of the standard graph in the world coordinate system of the computer as the basis standard, and then constructing a virtual network in the computer and recording the coordinate of the intersecting point of the contour line of the standard graph and the virtual network; inputting the image of a product to be detected into the computer by a measurement instrument, leading the image to fall into a virtual grid and reading the coordinate of the intersecting point of the contour line of the image and the virtual grid; and comparing the coordinate value of the intersecting point of the contour line of the standard graph and the virtual grid with that of the intersecting point of the corresponding part of the contour line of the image and the virtual grid and judging the product contour line quality by coordinate deviation value. The invention has high detection precision and easy operation and accords with industrial utilization.

Description

Technical field: [0001] The invention relates to the field of measurement technology, in particular to a detection method for measuring product contour lines combined with photoelectric instruments. Background technique: [0002] With the development of science and technology, higher and higher requirements are put forward for precise positioning measurement, so it is difficult for traditional vernier calipers or screw measuring instruments to meet the measurement requirements. Then photoelectric measurement appeared, using an image grabber (such as CCD) to convert the image of the measured object into an electronic signal, and then the electronic signal is sent to the computer, and the image processing chip of the computer will enlarge the image and display it on the monitor, and then use the computer's three-dimensional coordinate Corresponding to capture measurement, this method can reduce measurement error and improve measurement accuracy. [0003] For the quality inspe...

AI Technical Summary

Problems solved by technology

[0003] For the quality inspection of product contour lines, especially for non-standard contour lines, the current detection mainly adopts a relatively rough interval comparison, that is, as long as the product contour line falls within the range of the specified contour line floating, the actual deviation There is no way to determine how much, the detection quality is low, resulting in a large quality difference between qualified products, so it is necessary to improve

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