FPGA (Field-Programmable Gate Array)-based CIS (Contact Image Sensor) image acquisition system and acquisition method thereof

Abstract

The invention discloses an FPGA (Field-Programmable Gate Array)-based CIS (Contact Image Sensor) image acquisition system and an acquisition method thereof. The acquisition system comprises a CIS and further comprises an AD acquisition module, an FPGA data processing module, an LVDS (Low Voltage Differential Signaling) conversion module, a single chip control module and a cameralink interface, wherein the AD acquisition module is connected with an output end of the CIS; the FPGA data processing module is in both-way connection with the AD acquisition module; the LVDS conversion module and the single chip control module are in both-way connection with the FPGA data processing module; the cameralink interface is in both-way connection with the LVDS conversion module; the single chip control module is in both-way connection with the LVDS conversion module; the output end of the single chip control module is connected with an input end of the AD acquisition module; a PIC single chip is served as the single chip of the single chip control module; and the output end of the FPGA data processing module is connected with the CIS. The acquisition system provided by the invention is capable of accurately acquiring and detecting a CIS image, detecting the defects existing in a PCB (Printed Circuit Board) and increasing the yield of the PCB.

Description

technical field [0001] The present invention relates to a linear array contact image acquisition system used in hole inspection machines or other fields of the PCB industry, in particular to a CIS (Contact Image Sensor, contact image sensor) image acquisition system and acquisition method thereof. Background technique [0002] The contact image sensor (CIS) was developed in the early 1990s. Due to its compact structure, no complex optical lens components, small size, light weight, good shock resistance, and fast response, it has gradually replaced part of the CCD market. It is widely used in faxing, scanning, banknote bill recognition, and cursor reading. At the same time, the application of CIS in the PCB industry reduces the volume of testing instruments and increases stability and cost performance. [0003] The development of the PCB industry has made it impossible to adapt to manual inspection; through the acquisition of PCB images by CIS, through software analysis and ...

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Problems solved by technology

[0003] The development of the PCB industry has made it impossible to adapt to manual inspection; through the acquisition of PCB images by CIS, through software analysis and processing, defects in the PCB board can be easily detected and the competitiveness of PCB manufacturers has been improved; but how to better Using FPGA for CIS image acquisition, the acquisition system is becoming more and more accurate

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