Pcb AOI detection applICation of aoi in PCB detection
Automatic optical inspection, also known as automatic optical inspection instrument, is an automatic optical inspection device applied to surface mount production line, which can effectively detect printing quality, installation and welding joints The core of AOI is a CCD CAMera system used to capture images, but after a series of calculations, such as image processing cards and computer processing software systems, they are compared with standard images to find defects and generate files AOI can find and eliminate errors in the early stage of the assembly process to achieve good process control Early detection of defects will avoid sending defective products to the assembly stage of the subsequent process. AOI will reduce maintenance costs and avoid scrapping PCB boards that cannot be repaired
Circuit board

PCB for short are abstracts for assembling electronIC parts, and the manufacturing quality of PCBs directly affects the reliability of electronic products With the further development of electronic assembly towards the mixed technology of high-density and SMAll size PCBs, the demand for automatic optical inspection (AOI) systems for PCB inspection is also increasing in order to reduce the number of defective circuit boards entering the next step Big
AOI system has scientific and technological advantages that other detection schemes and traditional detection methods cannot match, and has been widely used in PCB detection. Its high speed, middle and high gear and high-precision features are favored by users in the industry.
1. The PCB inspection system checks and corrects PCB defects. The cost during process monitoring is much lower than that after final testing and inspection.
2. Repetitive errors can be detected as early as possible, such as incorrect placement displacement or pallet installation.
3. The combination of statistical analysis function of PCB detection technology and SPC process management technology provides a powerful weapon for timely improvement of SMT production process, and the yield of PCB assembly has been significantly improved. With the continuous expansion of modern manufacturing industry, production control becomes more and more important, and the demand for SPC data is also growing.
4. It can meet the test requirements of PCB assembly density. With the substantial increase in the assembly density of electronic products, some traditional testing technologies, such as ICT, can no longer meet the development requirements of SMT technology, and PCB testing technology will not be affected by these factors.
5. The test program of PCB test equipment can be generated directly from CAD data. Compared with ICT, because no special fixture is required, the test cost is also greatly reduced.
6. It can keep up with SMT production line According to the test results of PCB detection technology, it can reach the speed of 0 1 second/current frame, which can meet the requirements of online detection
7. The high reliability of manual visual inspection always has its limitations, while PCB inspection technology testing avoids the shortcomings in this regard, and can maintain better accuracy and reliability.