With the intelligence of electronic products, miniaturization and the miniaturization of electronic components, SMD processing plant inspection equipment requirements are also increasingly high-end. From the previous visual inspection to 2D AOI, and then to the current 3D AOI, detection technology, detection quality is getting better and better, creating a higher quality rate, to the hands of users of electronic products reliability and stability will be higher. So SMD processing plant inside the 3D AOI what role, can detect which welding quality?
The meaning of AOI
AOI refers to the automatic optical identification system, English (Auto Optical Inspection) abbreviation, has been commonly used in the electronics industry SMT reflow soldering after the quality and appearance inspection (of course, some AOI will be placed in front of the multifunctional mounter, especially smart phones, because the shielding cover involved, the shielding cover will be multifunctional mounter before welding Mounted to the PCB board. (If reflow soldering and then detection, then AOI will not detect the electronic components under the shield cover, so you need to use AOI detection before mounting the shield cover).
The difference between 3D AOI and 2D AOI
In a considerable number of SMD processing plant, or use 2D AOI, because some basic soldering quality by 2D AOI can be completed. Due to the relatively large cost of 2D AOI and 3D AOI, only some large factories will use 3D AOI, some products have very high requirements for reliability and stability (such as aerospace electronics, automotive electronics, etc.), and require 3D AOI to detect the solder quality.
2D AOI can only scan the information collected PCBA plane, and then generated by the AOI algorithm analysis, to determine whether the quality of standards. But many products have shaped electronic components, bent and irregular electronic components, because of the shadow and height difference, resulting in 2D AOI may not be able to scan and identify to get accurate imaging, so there will be welding quality omission, misjudgment, etc., then the bad PCBA will flow into the market, resulting in a variety of after-sales problems in the use of products, so 3D AOI was born.
Advantages of 3D AOI compared to 2D AOI
1.3D AOI can collect three-dimensional images, more intuitive, more three-dimensional and accurate.
2. Solve the problem of not being able to do inspection after board bending.
3. Solve the impact of different colors of PCB board on the sensitivity.
4. Improve inspection speed and production efficiency.