无损检测翻译外文原文及翻译

1、1.Key Techniques of the X-ray Inspection Real-time Imaging Pipeline Robot This paper presents a robotic system for weld-joint inspection of the big-caliber control ofsyncbro-follow control technique it can accomplish the technologic task of weld inspection. Therobotic system is equipped with a small focal spot and directional beam X-ray tube so the higherdefinition image of weld-seam can be obtained.Several key techniques about the robotic systemdeveloped are also explained in detail . Its const

2、ruction is outlined.Key words : X-ray inspection:real-time imagingrobotIntroduction Compared with radiographic examination teohniqueRETX-ray real time imaginginspection techniqueRTIIT has many advantages such as higher efficiency lower cost betterfeasible automation and weld-defects evaluation on-line.Furthermore，up to date technologyallows the X-ray RTIIT to be used in Non-Destructive Testing NDT of pipelines，and theinspection quality of this Technique is as good as that of the RET. Therefore N

3、DT equipments，which are used commonly in pipeline inspection and basing on the RET，need to be renovated bybasing on the X-ray RTIIT. To employ the X-ray RTITT in NDT of pipeline there must be an automation platform，andX-ray inspection real-time imaging pipeline robotIRTIPR is designed for the purpose. In factbesides the problems that have been resolved and are involved in the X-ray IRTIPRseveral keytechniques are presented in this paperin which we address the robot focusing on its intelligentcon

4、trol such as the autonomous motion in-pipe，the synchro-follow controltechnique and thecommunication of cooperation between in-pipe and out-pipe and we also outline the constructionof the robot.1 Composing and Working Principle of the Robot The X -ray IRTIPR connints of the two parts of in-pipe and out-pipe，as illustrated in Figl1 .The out-pipe part is camposed of mage collecting and processing system ， out-pipesynchro-rotary mechanism and its driving system.The image intensifier is driven by the

5、 out-piperotary mechanism to rotate round the center of pipeline to collect weld image and transmit videosignal to image processing computer image-collecting card. The in-pipe part is composed ofin-pipe computer，power and invcrters system ，walking and driving system ，X-ray system，in-pipe synchro-rotary rncchanism and its driving system and weld 一 seam autonomous seekingand locating system .TheX -ray tube in x-ray system is driven by the in-pipe rotary mechanism torotate round the center of pipel

6、ine. The main working principle of the robot is explained as follows:Under the control ofweld-seam autonomous seeking and locating system the in-pipe crawler finishes the localizationof working position at which the in-pipe crawler is in a state of waiting. When it receives thecommand signal from out-pipe which is transmitted by low frequency electromagnetic wave thein-pipe computer operates immediately the controller of X-ray system to realize its out-pipecontrol. In sequence the in-pipe and ou

7、t-piperotary mechanisms are controlled by thesynchro-followcontrol technique to rotate with the same center of pipeline and finish weld-seaminspection in the manner of rotating-irradiating-ratating.2 The Control Systern of the Robot2. 1 The Synchro-follow Control Technique of In-pipe and Out-pipe Rotary Mechanism In the light of the technologic requirement of X-ray RTIIT the X-ray tube and the imageintensifier must be required to rotate synchronously with the same center.Because the X-rayIRTIPR

8、adopts wireless working manner，i .e. there is no tether cables linking in-pipe without-pipe parts of the robot.How to realize the synchro-message communication between in-pipeand out-pipe control systems of rotary mechanism or how to realize synchro-control thenbecomes a key technique that must be solved.2.2 Weld-seam Autonomous Seeking and Locating Technique Autonomous seeking and locating mean that the robot determines automatically where is theworking position in-pipe with the help of sensors

9、 but without any ones inter-meddling. Thiscontrol-manner is actuallyfntelligent. The precision and reliability of seeking and locating asystem have direct relation with if a robot can realize autonomous motion in-pipe. If this system isdisabled the robot will take the place of the accident ofdeathor7ose the wayin-pipe. Generally methods for detecting. the position of weld-seam are as follows:1 Utilizeencoder or cyclometer 2 Utilize the displacement caused by the protrusion-concave changing ofwel

10、d-seam surface3 Utilize if the zone of weld-seam conducts electricity 4 Utilize radioactiveisotope such as y ray source 5 Utilize vision 6 Utilize low frequency electromagnetic wave.3 Conclusion Key techniques of the X-ray IRTIPR are assurances for X-ray RTIIT to realize automation. Ifa robot adopts the working means of having no cable and the synchro-follow control technique ofin-pipe and out-pipe rotary mechanisms being not solved，it will be impossible for the X-rayRTHT to realize automation a

《无损检测翻译外文原文及翻译》由会员汽***分享，可在线阅读，更多相关《无损检测翻译外文原文及翻译》请在金锄头文库上搜索。