【作者】 李斌；

【导师】 金杰；

【作者基本信息】 天津大学 ， 电磁场与微波技术， 2007， 硕士

【摘要】 电阻焊是工业上常用的焊接方式之一,在现代社会中,它广泛应用在机械、航空、航天、汽车制造等领域。对于优质高效的电阻焊机,有着庞大的市场需求和生存空间。本论文以实际商用为目的,紧密结合市场需要,在分析研究大量相关资料的基础上,设计了一种智能控制的点焊机控制器。该控制器软硬件均采用模块化设计,具有单点点焊和连续点焊功能、断电情况下数据自保存功能,可以存储最多30组规范供用户使用。人机界面友好,使用简单方便。在硬件上,前面板和主控板各使用一片微处理器,形成了双MCU的核心结构。经过合理的设计,两片微处理器的I/O接口利用充分,能较好地实现控制、计算的功能。在人机接口方面,液晶屏使用MGLS19264显示模块,具有4行12列的汉字显示功能,基本满足参数显示和人工控制的需要。可控硅脉冲触发电路采用独立的脉冲产生芯片,其输出脉冲宽度由硬件决定,保证了对可控硅的有效触发,同时也节省了微处理器的硬件资源。由电流互感器反馈回来的焊接电流,经前置电路处理后进入AD7574数模转换器,数字化后交由单片机处理,得出实时的焊接电流和下一周波需要调整的触发角,构成一个闭环恒流控制系统。在软件上,采用自下而上的设计方法,先逐步设计各个功能模块,再将其组合成为统一的整体。软件使用汇编语言编写,在WAVE6000仿真器集成开发环境下调试。更多还原

【Abstract】 Resistant Welding is wildly used in the industries. In modern society, it is common in the fields of machine, aviation, spaceflight and automobile. So, there is a huge market demand for the resistant welder.In this paper, based on the market demand, we designed an intelligent spot welder controller for the commercial purpose after researching a lot of related references. The software and hardware of the spot welder controller are both adopted module design method. It can do the single spot welding or continuous spot welding. The controller has the function of saving data automatically after power down and can store upto 30 criteria for the users. It’s man-machine interface is friendly and easy to use.On the hardware part, there is a single chip controller in both front panel and main board, which is called "double MCU core structure" by us. The I/O interfaces of the two single chip controllers are used sufficiently, so they could complete the functions we demand quite well. The liquid crystal screen, which uses MGLS19264 module, could display 4 rows and 12 lines Chinese characters. The SCR pulse trigger circuit adopts a dual retriggerable resettable monostable multivibrator that could supply a stable width trigger pulse. The pulse width is set by the hardware circuit. So the circuit can insure to trigger the SCR, and meanwhile it saves the single chip controller system resources. The welding current, which is fed back by the current sensor, will enter AD7574 and be finally processed by the single chip controller. And the single chip controller will get the real-time welding current and the next trigger angle demanded by the next cycle.On the software part, we used the "from bottom to top" method. Above all, we designed the every single part of the function modules, and then assembled them together. We used the assembly language to write the program, and debugged them in the IDE WAVE6000.更多还原