A method for Android automatic testing defect black light

Abstract

The invention discloses a method for automatically testing defective black light lamps. It uses a USB high-definition macro camera to take pictures of non-destructive testing workpieces. After zooming in or out of the picture, the length and size of the crack are automatically calculated by pointing at two points on the crack. The specific operation steps are as follows: (1) Based on the camera model, a point M in space to The mapping of the image plane point m is transformed by the projection matrix P to obtain the coordinates sm=K[R|T]M of the image point; (2) the spatial object point is projected onto the left and right images through two projection matrices P, according to the three-dimensional Based on the theory of reconstruction, the two projection matrices P and the coordinates of the two image points on the image are obtained, and the three-dimensional coordinates of the target point are located using the triangulation method, so as to calculate the length and size of the crack. The invention has the beneficial effects of automatically calculating the length and size of the crack, so that operators can directly obtain bad work information on the screen of the handheld device, thereby improving production efficiency.

Description

technical field [0001] The present invention relates to the technical field related to black light lamps, in particular to a method for Android automatic testing of defective black light lamps. Background technique [0002] Black light lamp is a kind of special gas discharge lamp, which emits 330-400nm ultraviolet light wave, which is insensitive to human beings, so the lamp made of this kind of human insensitive ultraviolet light is called black light lamp. Black lights look just like regular fluorescent or incandescent light bulbs, but they are completely different in some ways. Maintenance crews use it to find hidden cracks in machinery by injecting a small amount of fluorescent dye into a fuel supply and then shining a black light on the unit. For example, adding a fluorescent dye to the refrigerant in an air conditioner can detect leaks in the air conditioner that are invisible to the naked eye. However, the original non-destructive flaw detection instrument cannot au...

AI Technical Summary

Problems solved by technology

However, the original non-destructive flaw detection instrument cannot automatically calculate the length of the crack, and it is necessary to manually measure the length and size of the crack with measuring tools