Abstract
A self-designed new robot system to be employed in the weld inspection of nuclear pipes is introduced in this paper. This robot system can effectively serve as a substitute for a worker who would otherwise be exposed to a hazardous environment. The robot system includes a half clamp as a mounting unit and a half base as circumferential rotation joint. This system can be mounted on a branch pipe at any position. Its arm is designed with six joints for controlling the position and orientation of the ultrasonic probe (USP), which serves as an end-effector. All of these seven joints, which yield seven degrees of freedom (DOF), are driven by stepper motors. The communication between the Industrial Personal Computer (IPC) and Micro Chip Unit (MCU) is based on RS-485, which allows the robot system to be operated and monitored away from a radiative environment and can therefore limit radiation exposure for the operator. Taking the application at different working sites in nuclear power stations into consideration, the design of the system is based on a modular structure, and the substitution of the clamp and base, as well as the adjustment of the size of the arm links are taken into account. Finally, a test unit for the designed robot system is set up, and experiments show that this system could meet the requirements of a real nuclear power station environment.
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References
Fallon JB, Shooter SB, Reinholtz C (1996) Design of an underwater robot for nuclear reactor vessel inspection. In: Robotics for Challenging Environments. ASCE Press, New York, pp 311–319
Yamamoto S (1992) Development of inspection robot for nuclear power plant. In: Proceedings of the IEEE International Conference on Robotics and Automation. 2:1559–1566
Yan CQ, Li HX (1994) The development of robot technic in nuclear power plants. Nucl Power Eng 15(1):29–33 (In Chinese)
Fujita M, Kitano H, Kageyama K (1999) A reconfigurable robot platform. Robot Auton Syst 29(2):119–132
Cohen R, Lipton MG, Dai MQ, Benhabib B (1992) Conceptual design of a modular robot. J Mech Des – Trans ASME 114(1):117–125
Dirauf F, Gohlke B, Fischer E (1998) Innovative robotics and ultrasonic technology at the examination of reactor pressure vessels in BWR and PWR nuclear power stations. http://www.NDT.net, 3(10) October 1998
Wang Q, Zalzala AMS (1996) Transputer based GA motion control for Puma robot. Mechatronics 6(3):349–365
Ting Y, Lei WI, Jar HC (2002) A path planning algorithm for industrial robots. Comput Ind Eng 42:299–308
Cai ZX (2000) Robotics. Tsinghua University Press, Beijing
Ma XF (1991) Robotic mechanism. Mechanical Industry Press, Beijing
Xiong YL (1996) Basic robotic technology. Huazhong University of Science and Technology Press, Wuhan
Fu XG, Yan GZ, Yan B, Yu LZ (2004) Inverse resolving and simulation on 7-DOF robot applied to detecting the weld of inlaid pipes. J Shanghai Jiao Tong Univ 38(8):1321–1323
Kim YT, Fan SC, Han SH, Go HS (2001) Image-based visual feedback control of a dual-arm robot. Proceedings of the IEEE International Symposium on Industrial Electronics, 12–16 June 2001, 3:1603–1608
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Fu, X., Yan, G., Yan, B. et al. A new robot system for auto-inspection of intersected welds of pipes used in nuclear power stations. Int J Adv Manuf Technol 28, 596–601 (2006). https://doi.org/10.1007/s00170-004-2384-0
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DOI: https://doi.org/10.1007/s00170-004-2384-0