The Integration And Related Technology Research Of East Device Large Field Of View Infrared Visible Camera System

During the discharge of the EAST device,the state of plasma-facing-components has a crucial influence on the realization of long pulse steady-state operation of the device.To monitor the status of plasma-facing-components in the process of discharge in realtime,the infrared camera software used in the EAST device is redeveloped,and a highspeed optical fiber network is built to quickly transmit the data collected by the infrared camera.At the same time,to study the heat flux of the divertor target,the code of threedimensional heat flux of the divertor target is developed based on the temperature data measured by the infrared camera,and the code verification and preliminary physical analysis are carried out.The main contents of this paper are as follows:(1)Software development of the infrared camera.According to the new discharge experiment needs of EAST,the image acquisition and processing code of the infrared camera TS-IR-MCT are developed by using MFC and Open CV3.4 in VS2015.The software functions include camera parameter setting,acquisition of the experimental image,video playback,acquisition of video framing and data upload to the server.At the same time,a set of plasma infrared image transmission systems based on a high-speed optical fiber network is built.The transmission system has a stable data transmission speed higher than 450Mbyte/s,and provides a rich network expansion interface,which can meet the needs of a large number of terminal devices accessing the data transmission system at the same time.(2)A dither elimination algorithm for plasma infrared image is proposed and compared with Scale Invariant Feature Transform(SIFT)algorithm.The algorithm is based on the idea of image feature point matching,and uses Random Sample Consensus(RANSAC)algorithm to screen the wrong matching points in the infrared image feature point matching,which solves the problem of matching errors in the process of feature point matching caused by the low image quality and low image signal-to-noise ratio.The results show that the proposed algorithm is more effective than SIFT algorithm.(3)A three-dimensional heat flux calculation code for the outer target of the upper divertor is developed,and the discharge experiment of EAST is analyzed.Firstly,the system model of the upper divertor target with active water cooling is established,and the pixel resolution of the infrared image on the target is calibrated.After the dither of infrared image is eliminated,the temperature data of the exact position of the divertor target in the discharge process of the device is obtained,and the heat flux distribution on the divertor target is calculated.Finally,the physical analysis of the heat flux on the divertor target is carried out according to the calculation results.Based on the EAST Tokamak,the preliminary experimental results are obtained by the relevant research on the infrared camera diagnosis system.This paper provides an important diagnostic means and reference method for the temperature monitoring and related characteristics analysis of plasma-facing-components.