FPGA-based plasma sterilization device for wound-edge recognition  

作　　者：Huijuan Lu Xiaorong Tang Minglei Li Xueping Jiang Wenxiang Xiao Hua Li 

机构地区：[1]School of Life and Environmental Sciences,Guilin University of Electronic Technology,Guilin 541004,People’s Republic of China [2]Guilin URIT MEDICAL Electronic Sales Co.,Ltd.,Guilin 541004,People’s Republic of China

出　　处：《Nanotechnology and Precision Engineering》2024年第3期56-70,共15页纳米技术与精密工程（英文）

基　　金：supported by:the National Natural Science Foundation of China under Grant Nos.62163009 and 61864001;the Natural Science Foundation of Guangxi Province under Grant No.2021JJD170019;the Foundation of Guangxi Key Laboratory of Automatic Detecting Technology and Instruments(Guilin University of Electronic Technology)under Grant No.YQ23103;the Innovation Project of Guangxi Graduate Education under Grant No.YCSW2022277.

摘　　要：There is a currently a lack of large-area plasma sterilization devices that can intelligently identify the shape of a wound for automatic steriliza-tion.For this reason,in this work,a plasma sterilization device with wound-edge recognition was developed using afield-programmable gate array(FPGA)and a high-performance image-processing platform to realize intelligent and precise sterilization of wounds.SOLIDWORKS was used to design the mechanical structure of the device,and it was manufactured using 3D printing.The device used an improvement of the traditional Sobel detection algorithm,which extends the detection of edges in only the x and y directions to eight directions(0○,45○,90○,135○,180○,225○,270○,and 315○),completing the wound-edge detection by adaptive thresholding.The device can be controlled according to different shapes of sterilization area to adjust the positioning of a single plasma-jet tube in the horizontal plane for two-dimensional move-ment;the distance between the plasma-jet tube and the surface of the object to be sterilized can be also adjusted in the vertical direction.In this way,motors are used to move the plasma jet and achieve automatic,efficient,and accurate plasma sterilization.It was found that a good sterilization effect could be achieved at both the culture-medium level and the biological-tissue level.The ideal sterilization parameters at the culture-medium level were a speed of 2 mm/s and aflow rate of 0.6 slm,while at the biological-tissue level,these values were 1 mm/s and 0.6 slm,respectively.

关 键 词：FPGA Wound-edge recognition Improvement of the Sobel algorithm PLASMA Automatic and precise sterilization 

分 类 号：TH77[机械工程—仪器科学与技术] TN791[机械工程—精密仪器及机械]