【作者】 夏晓俊；

【导师】 薛家祥； 马志光；

【作者基本信息】 华南理工大学 ， 机械工程， 2011， 硕士

【摘要】 双丝脉冲焊是一种高效节能、优质经济的焊接工艺方法,能够提高焊接生产效率和焊接质量,在我国乃至国际具有广阔的发展前景,是目前国际焊接界研究和推广的热点之一。本论文在在国家自然科学基金(项目编号:50875088)及广东省科技攻关项目(项目编号:2010B010700001)的支持下,研制了基于DSP的双丝焊机及其人机界面,并对其进行了电路调试和性能测试。本文首先确定了双丝焊接电源的总体设计方案,确定了以TMS320F2808 DSP为核心的硬件控制系统,包括DSP控制电路、主电路控制方案、信号反馈电路、软开关电路、驱动电路、检测以及保护电路。其次,设计了双丝焊接电源的软件系统,包括软件控制系统流程图,I/O初始化程序,A/D中断采样程序等。再次,确定了基于ARM的触摸屏人机界面系统总体方案,先从硬件平台设计入手,确定ARM9芯片为控制核心,根据需求进行电路裁剪,设计硬件电路。包括基于ARM9的触摸屏控制电路,触摸屏与主控制板的串口通讯电路设计,人机交互软件流程设计,焊接过程控制图文显示以及人机交互界面设计等。最后,利用实验室设备搭建测试平台,进行双丝脉冲焊接电源性能测试,包括系统外特性测试,PWM波形等,验证了系统设计的科学性和准确性,为以后的进一步研究打下坚实基础。更多还原

【Abstract】 Double-wire pulse welding is a welding technique with high energy efficiency, high quality and low economic cost. It can raise working production efficiency and welding quality. Since it has been one of the research and extension hot spots in the international welding industry, it will have an expansively developing prospect in China and even in the world. Supported by the project of NSFC (NO.50875088) and GDSTC (NO. 2010B010700001), a DSP-based double-wire welding machine and its human-machine interface was developed, and then, circuit and properties test experiments were conducted.In this paper, a general design of double-wire welding power supply was firstly identified, and then the hardware control system based on DSP TMS320F2808 was determined, which includes DSP control circuit, main circuit control program, the signal feedback circuit, soft-switching circuit, drive circuit, detection and protection circuit.Secondly, a double-wire welding power software system was designed, including the software control system flowchart, I/O initialization procedures, A/D interrupt sampling procedures, etc.Thirdly, the program of touch-screen human-machine interface system based on ARM was determined. Started with the hardware platform design, the ARM9 chip control of the core was made, the circuit was cut and hardware circuit was designed, including touch-screen control circuit based on ARM9, the serial communication circuit design of touch-screen and the main control panel, human-machine interactive software process design, welding process control graphic displays and human-machine interface design, etc.Finally, using the test platform built by the equipment of laboratory, the power performance test of the double-wire pulse welding machine was made, which includes the system external features test and PWM waveforms, etc. This research has validated the science and accuracy of systemic design and built a solid foundation of further study.更多还原