Efficient Computing System For High Speed Digital Printing

In the era of big data,industrial printing has become an increasingly important part of China’s economic development by virtue of its own advantages of high demand and wide market.With the progress of society,people’s demand for small batch and personalized printing is becoming stronger and stronger.While traditional printing has long plate making time,complex workflow,poor timeliness,single print media and other shortcomings,which cannot meet the new demand for printing,and there are disadvantages such as environmental pollution and waste of resources,which are not conducive to national sustainable development.As an advanced digital manufacturing technology,digital printing has the characteristics of transmission and printing,flexibility and efficiency,green and environmental protection.It can be applied to many fields such as metal,ceramics,cloth,electronics,plastics,etc.It is expected to become the mainstream printing technology in the future.In order to achieve high-speed continuous high-precision digital printing,high-quality printheads and high-performance control system support.Among them,the control system needs to achieve high bandwidth,low latency,low jitter data command transmission and high parallelism of data processing.Therefore,solving the problem of insufficient transmission performance and insufficient computing power of the control system is the key to complete the printing transformation.In this paper,we adopt the design idea of domain-specific So C to study,design and implement an efficient computing system for high-speed digital printing,which solves the technical difficulties in digital printing.The main research elements are as follows:(1)Design and implementation of a bit manipulation coprocessor and its modularity.By studying the working mode of digital printing,a bit-operated approach to printhead control is proposed.Given that general-purpose processors are not good at bit manipulation,this paper designs a bit-operated coprocessor.Based on the analysis of the printhead operation pattern and the control performance requirements,hardware logic resources are used to implement the co-processor functions and optimize its performance in a modularized form,solving the problems of data transfer and insufficient computing power.The bit operation unit module and the design of operation instructions provide convenience for subsequent development.(2)Design and implementation of special So C system in the field of high-speed digital printing.A special So C system for digital printing field is designed,which is composed of processor,high-capacity storage medium and bit operation coprocessing module.According to the design of bit operation coprocessing module,this paper develops the software and hardware respectively on the heterogeneous computing platform of ARM + FPGA,and realizes a set of digital printing control system.For different sizes of printed documents,two printing modes,one-time transmission and real-time transmission,are designed to improve the flexibility of the system.(3)The design and implementation of a high-speed digital inkjet printing system.Based on the system design of a dedicated So C for the digital printing field,a peripheral function module such as network,power supply and debug interface is further designed to realize a dedicated board for the printing field with ZYNQ 7020 as the core.After testing,the system network real-time transmission rate can be maintained at 947 Mbps,the bus data transmission bandwidth is about 800MB/s,the instruction transmission delay is less than 10 ns,and the system data throughput rate can reach 1500Mbit/s.Using the W160 printhead as the system performance test object,the printing speed can be achieved at 600 dpi printing precision of200cm/s,and at The W160 printhead is used as the system performance test object,which can achieve printing speed of 200cm/s at 600 dpi printing precision and 100cm/s at 1200 dpi printing precision,which can meet the basic production requirements of industrial printing.Compared with the current mainstream digital inkjet printing system,the network transmission rate is increased by 57.8%;the data throughput rate is 4.7 times higher than the mainstream solution.