The role of three-dimensional AOI in SMT production line
The full Chinese name of AOI is AutomatIC Optical Inspection, which is a kind of equipment based on optical principle to detect common defects in welding production AOI is a new testing technology, but it is developing rapidly. Many manufacturers have introduced AOI testing equipment During the automatic inspection, the machine automatically scans the PCB through the CAMera, collects images, compares the tested solder joints with the qualified parameters in the database, checks the defects on the PCB after image processing, and MARKs the defects on the display or through the display or automatic marks, and then the maintenance personnel carry out maintenance
High speed and high-precision visual processing technology is used to automatically detect various installation errors and welding defects on PCB boards. PCB boards range from fine pitch high-density boards to low-density large-sized boards,
Circuit board

It can also provide online detection solutions to improve production efficiency and welding quality By using AOI as a tool to reduce defects, errors can be found and eliminated early in the assembly process to achieve good process control Early detection of defects will avoid sending bad boards to subsequent assembly stages AOI will reduce maintenance costs and avoid scrapping irreparable circuit boards
In the process of automatic inspection, the machine automatically scans the PCB through the camera, collects images, compares the tested solder joints with the qualified parameters in the database, checks the defects on the PCB through image processing, and displays/marks the defects through the display or automatic marks, which are repaired by the maintenance personnel. AOI (Area of Interest), namely information plane, also known as interest plane, is a geographical entity in the form of region in map data.
In order to control quality, SMT production line must be controlLED With the change of circuit board size, it brings more challenges, because it makes manual inspection more difficult In response to these developments, more and more OEMs are adopting AOI AOI is used as a tool to reduce defects, find and eliminate errors in the early assembly process, so as to achieve good process control Early detection of defects will avoid sending defective circuit boards to the subsequent assembly stage, and AOI will reduce maintenance costs and avoid scrapping The repaired circuit board appears
Prior to AOI, the inspection of the switchboard was done manually by the operator This process involves many operators using the microscope SMT production line at the workstation Generally, check the surface of the circuit board for missing components, incorrect pastes or solder paste defects Check the circuit board by image restriction method, one for each website/Article 4 of the Board of Directors Although for Small circuit boards, this inspection method is easy to implement. With the increase of circuit board size, there are thousands of components. This inspection method is confusing The detection elements are accurate and reliable, and manual detection has its limitations when it is best

The above is the explanation given by the editor of pcb circuit board company.
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