Research On Image Acquisition System Of Banknote Clearing Machine Based On

Along with the increase in the number of versions on the market currency notes and the breakage of the notes and rampant counterfeiting. Bank is more and more high to the requirement of currency sorter, not only to identify its authenticity and also clarify face value, orientation, new and old damaged degree. paper currency image acquisition system is the core part in paper currency sorting. paper money clarify most standard to judge from the image.In this paper, aiming at the characteristics of paper currency sorting, designed a contact image sensor based image acquisition system.Core processor used in this system is XC7Z020-1CLG484C, It is Xilinx’s new launched Zynq-7000 series chips. CIS image sensor use Canon’s MR06H-Z02, AD chip chosen is HOLTEK’S HT82V46, SDRAM is MT41J256M8HX₁5E of the MICRON company. In the PL of Zynq-7000, complete drive CIS, drive and configuration AD design, data acquisition and calibration, Call the AXIVDMA IP core and Video to AXI4-Stream IP core to complete data transmission. In the PS configuration SPI interface and serial interface respectively with the mainboard or PC communication, and complete the system configuration initialization boot. CIS output three analog signals through HT82V46 three-channel pattern after sampling and AD conversion, In the PL of Zynq-7000 complete Image acquisition and calibration, and using the VDMA IP core through HP channel to write image data into the DDR3 SDRAM, for the use of PS image processing, processing results can be sent to the PC through a serial port or SPI port.