Research And Implementation Of Zynq Optical Fiber Transmission System For Video Signal In Mine Roadway

Mining underground safety production has always been highly valued by the national mining regulatory authorities,and a number of measures have been taken to ensure production safety.Among them,the use of information technology to predict and prevent is an important means.As a kind of monitoring technology,image data can be reliably transmitted to the command center in time regardless of normal production or accident,which is of great significance for production operations and rescue and rescue.In response to the above problems,this article has mainly done the following four tasks:The mine operating environment is complex and there are many interference sources.How to ensure the reliable transmission of image data is the first research content of this article.In order to solve this problem,this paper conducts theoretical and practical research on optical fiber communication technology,and finally adopts a photoelectric converter scheme to realize the optical fiber transmission of the system to ensure the stability and safety of the transmission channel.The amount of image data,especially high-definition image data,is a burden on storage space and transmission channels.Compressing and encoding the data before image data transmission can reduce transmission and storage pressure.This paper first researches the still image compression coding algorithm and proposes an adaptive scanning compression algorithm based on discrete cosine transform.Experiments show that the peak signal-to-noise ratio and structural similarity of the algorithm are better than the JPEG algorithm in the case of0.5 unit pixel depth.Increased by 7.4% and 1%.Then research the video coding technology and determine the video coding scheme and the overall hardware design scheme.Adopt Zynq UltraScale+ MPSoC EV platform as the system main control chip and complete the system design.Among them,the video capture is completed through the PL end;the video compression encoding is completed through the built-in VCU encoder on the PL end,and the input TMDS differential signal is converted into a 24-bit RGB signal through the ADV7611 chip at the video input end,which reduces the resources of the PL end.usage of.On the PS side,the video capture,encoding and stream transmission are designed through the Gstreamer framework.The final monitoring system is realized through the design of the application program.In the design of the application program,the data is sent to the VCU through the interrupt mode to improve the video reading speed.In this paper,the system function test is performed on the ALINX development board.The functions of the system test include resource occupancy analysis,timing constraint analysis,system power consumption analysis,basic acquisition to transmission function,compression ratio,bit error rate,and encoding delay time.The test results prove that the system designed in this paper can be applied to actual monitoring scenarios.