The main application of the AOI algorithm is empty soldering

The main application of the AOI algorithm is empty soldering

The application of algorithms is a key part of the application of AOI(Automatic Optical Inspection Instrument) algorithms in the field of inspection. Shenzhou Vision AOI has over 20 algorithms, and each algorithm has its specific purpose. Therefore, on the basis of being familiar with and understanding various AOI algorithms, applying AOI algorithms to each detection item is the prerequisite for AOI engineers to create detection programs.

Empty soldering is mainly used for the inspection of soldering after the furnace. The ROI area of empty soldering is the solder climbing area of the solder joint, which detects whether the solder joint has an empty soldering phenomenon. The phenomenon of empty soldering refers to the situation where there is no solder at the solder joint; it is merely copper foil. The color characteristics of the empty welding phenomenon are high brightness and reddish chromaticity. The algorithm adopted for the detection of empty welds is the "TOC algorithm", and its default parameters are as follows:

Parameter Parameter range

The red range interval is (65, 180), where the lower limit is 65 and the upper limit is 180.

The green range interval is (0, 70), where the lower limit is 0 and the upper limit is 70.

The blue range interval is (0, 60), where the lower limit is 0 and the upper limit is 60.

The brightness range interval is (80, 255), with the lower limit being 80 and the upper limit being 255.

The determination range interval is (20, 100), where the lower limit is 20 and the upper limit is 100.

The above parameters are expressed in the chromaticity triangle as follows:
The main application of Shenzhou Vision's AOI algorithm is empty welding

① is the parameter area of color extraction, and ② is the image area represented by the parameters.