基于嵌入式技术的激光功率自动控制系统

Laser power automatic control system based on embedded technology

针对传统激光功率稳定系统存在硬件设计体积较大、成本较高等缺陷,设计基于嵌入式技术的激光功率自动控制系统,该系统硬件包括A/D转换器、嵌入式FPGA微控制器、PD背向光探测器以及低通滤波器,它们完成激光功率信号的采集、转换以及激光功率的自动控制,软件采用PWM算法完成系统软件运算控制,采用单片机功率控制方法增强激光器功率控制的稳定性,实现激光器功率的自动控制。实验结果表明,该系统的激光功率自动控制失误率仅为11.48%,解决单次激光功率自动控制问题用时均值约为0.11s,与同类系统相比,具有低失误、高效率的优势。

The traditional laser power stabilization system based on sequential control has a large hardware design volume and high cost,which is not conducive to large-scale use.A laser power automatic control system based on embedded technology is designed.Its overall structure includes A/D converter,embedded FPGA microcontroller,PD backward light detector and low-pass filter.These system hardware complete the acquisition and conversion of laser power signals and automatic control of laser power;System software based on PWM algorithm completes the system software operation control.The use of single-chip power control method enhances the stability of laser power control.And the realization of laser power automatic control is carried out.The experimental results show that the error rate of laser power automatic control is only 1.28%,and the mean time used to solve the single-time laser power automatic control problem is about 0.11 s,which has the advantages of low error and high efficiency compared with similar systems.