基于DSP的激光标记数字控制系统设计

Design of laser marker digital control systems based on DSP

为了设计激光标记数字振镜控制系统,采用数字信号处理器芯片作为数字控制板的主处理器,使用具有高传输速率和支持热插拔的通用串行总线进行上位机与数字控制板的通信;标记图形的数据处理算法由具有高速运算能力的数字信号处理器完成,复杂可编程逻辑器件芯片完成控制信号的时序控制和输出,使用传送差分信号的RS-485总线进行控制系统与数字振镜和激光器的通信,根据理论分析和参量模拟,得到了对数字振镜的转动角度和激光器功率的高精度控制。结果表明,该系统可以实现实时、高速、高精度的激光标记。

In order to design a laser marking digital galvanometer control system, taking a digital signal processor （DSP） chip as the main processor of the digital control board, taking universal serial bus for the communication of the host computer and digital control board because of its high-speed transfer rate and hot-plug support, mark graphic data processing algorithms was completed by the high-speed DSP chip, and a complex programmable logic device（CPLD） was used to control the signal timing. For RS-485 bus can transfer differential signal, it was used to communicate between the digital galvanometer and laser. According to theoretical analysis and simulation, the rotation of digital galvanometer and laser power can be controlled with high-precision. The results show that this system can be applied for real-time, high-speed, high-precision laser marking.