Research On Wireless Control Method Of Mobile Welding Robot

With the development of robot technology, people expect the robot could do what people do in more fields. Because of welding industry’s strong radiation, heavy smoke and dust, high danger and serious working environment, using wireless communication technology to control welding robot could reduce or even avoid these dangers. Thus it was great potential to make use of wireless communication technology to control welding robot. This paper built a mobile welding robot wireless controlling platform based on DSC as well as a multi-channel welding seam video transmission and monitoring platform based on LAN C/S communication model aiming at composite information transmission methods of welding robot.First of all, this paper introduced main related technology involved in building composite information transmission platform, including such as IR, Bluetooth, Purple bee, IEEE802.11, radio frequency identification all these common short distance wireless communication technology and network classification, network model, network protocol of network transmission technology.Secondly, this paper elaborated the design methods of mobile welding robot’s wireless controlling system from software and hardware. The hardware part included USB to RS232serial circuit based on PL2303, wireless radio frequency circuit based on DSC and SX1212, and stepper motor control circuit based on TB6560. The software part included PC operator interface under Visual C++6.0integrated visualization environment, serial communication program, wireless transmitter program, wireless receiver program, stepper motor control program under MAPLAB IDE V8.32integrated environment.Thirdly, this paper designed welding robot multi-channel welding video transmission software based on LAN C/S communication model. At first, it concisely introduced the relative knowledge of network video transmission technology, including multi-threading technology, Socket technology, IP multicast technology, and it also designed MWRNCP (mobile welding robot network communication protocol) based on UDP protocol. At the same time, this paper introduced the collection, compression, video stream transmission of sever-side video, the video stream receiving, playback, decompression of the client side. During the software design process, strictly compliance with software engineering methods, and finally designed C/S communication model software in Visual C++6.0environment.Finally, this paper tested the composite information transmission platform of mobile welding robot in the actual welding process, including welding robot wireless control experiment and LAN video transmission experiment. The experiment results show that the paper building the wireless controlling platform based on DSC is able to transfer controlling instruction of welding robot, as well as the software based on LAN C/S communication model can meet the requirements of multiple video transmission and monitoring of welding robot.