串口通信在激光器监控系统中的应用

Application of serial communication in laser monitoring system

摘要:

随着光纤激光器广泛应用与快速发展，市场竞争与成本控制不断加强，其光电系统的控制与保护成为光纤激光应用的关键。为实现激光器的智能化控制和预报警保护，降低生产和维护成本，详细介绍了激光器监控系统的软、硬件设计及其测试结果。通过Visual Basic编写USB转RS232的串口通讯软件，以STM32F407ZG单片机为核心设计了激光器功率驱动、故障保护、数据采集等硬件电路，完成PC端上位机软件对光纤激光器功率的控制（0～100%），实现对光纤激光器泵源温度、工作电流、工作状态等数据的实时采集和监测。根据对300W光纤激光器输出功率进行测试，可得到系统光光转换效率高达70.53%。同时经过72h整机老化后，根据测试结果可得到激光器功率输出稳定度高达96.6%。设计已广泛应用于切割、焊接、精密打孔、3D雕刻等工业加工领域的实际生产中。

Abstract:

With the wide application and rapid development of fiber laser, market competition and cost control are increasingly strengthened, the control and protection of its optical and electronic system have become the key to the application of fiber laser. To achieve the intelligent control of the laser and pre-alarm protection, reduce the production and maintenance costs, a design of the software and hardware for the laser monitoring system, and its test results has been introduced in detail in this paper.The serial port communication software of USB to RS232 was programed by Visual Basic, and these hardware circuits of laser power drive, fault protection and data acquisition was designed with STM32F407ZG microcontroller as the core. The power (0 ~ 100%) of the fiber laser was controled by PC software, and these datas of pump source temperature, working current and state can be collected and monitored in real time. According to the measurement of the output power of the 300W fiber laser, the optical conversion efficiency of the system is as high as 70.53%. At the same time, the power output stability of the laser reaches 96.6% after continuously worked about 72 hours. This design has been widely used in cutting, welding, precision drilling, 3D engraving and other industrial processing fields in the actual production.