An automatic optical inspection system based on cpu+gpu+fpga architecture

Abstract

The invention discloses an automatic optical detection system based on CPU+GPU+FPGA architecture. It includes an image storage unit, an image calculation unit and an image acquisition unit, the image storage unit has a first communication interface and a second communication interface, and the image calculation unit has a first optical fiber interface, a second optical fiber interface, and a third optical fiber interface and a fourth optical fiber interface, the image acquisition unit has a third communication interface and a camera interface; the image calculation unit receives configuration parameters and test commands sent by the image storage unit through the first optical fiber interface, and sends test results to the image storage unit, Receive data from the image acquisition unit through the second optical fiber interface, send configuration parameters and test commands to the image acquisition unit, control point-screen signal generation through the third optical fiber interface, and control the IO light source through the fourth optical fiber interface. The invention has the advantages of simple structure, low cost, good stability, good coordination ability, strong calculation processing ability and the like.

Description

technical field [0001] The invention belongs to the technical field of automatic optical detection, and in particular relates to an automatic optical detection system based on CPU+GPU+FPGA architecture. Background technique [0002] AOI automatic optical inspection involves optical system, mechanism control system, point screen control system, software control system, image processing system, etc. Traditional AOI equipment is based on image acquisition card + PC, with many acquisition cards and PCs, high cost, difficult coordination, poor system stability, inconvenient expansion, and difficult to use for large-scale module detection; and each TFT-LCD AOI automatic optical Testing equipment manufacturers only have technology accumulation and research and development capabilities in one or two fields, and basically cannot completely cover all fields. They can only build a complete set of AOI automatic optical testing system through the combination of 2-3 products. The overall...

AI Technical Summary

Problems solved by technology

Therefore, this simple system integration solution is not only complicated in system and high in cost, but also poor in stability and low in efficiency.

[0003] In the prior art, the dot screen signal and the image acquisition and processing unit are two different system solutions, and another main control unit is required to coordinate the control of the dot screen signal and the image acquisition and processing unit, which brings about a decrease in overall system efficiency; each image acquisition The card can only be connected to 1 camera. At present, most image acquisition cards use the PCIE interface to communicate with the PC. Such a PC can support a limited number of acquisition cards at the same time. A large number of image acquisition cards will be used and the number of PCs will increase. The PCs are coordinated and controlled by the main control PC, the complexity and system stability are difficult to control, and the image computing and processing capabilities of each PC are poor; at the same time, the existing AOI detection equipment scheme, point screen signal, light source and AOI detection The systems are all independent system units, and the total control unit is required to coordinate the control point screen signal generation, light source, and image acquisition and processing of the AOI detection system. The control process is complicated and the cycle time is long.

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