摘要
针对普通光纤功率计测量精度低、测量稳定性差等特点,采用硬件反馈电路对输入光信号进行调制和解调。考虑到检测光强发生变化时易导致光纤功率计测量出现较大误差的特性,提出了软件滑动滤波法与最小二乘法相结合的方式确定自适应控制数字滤波方案。自适应控制系统引入ARM处理器也提高了控制系统的处理速度和检测精度。实测结果验证了该系统具有很好的自适应控制的作用,表明采用自适应控制的方法为光纤功率值测量稳定性的提高提供了一种很好的参考。
Against the demerits of the ordinary optical fibre power meters （ OFPMs ） , e. g. , the low measurement accuracy and the poor measurement stability, the input optical signals are modulated and demodulated by using feedback circuit of hardware. Considering that larger error may appear in measurement of OFPM when the detection light intensity changes, the digital filtering scheme which combines the software sliding filtering method and the least squares method are proposed to determine adaptive control. In this adaptive control system, ARM processor is introduced for enhancing the processing speed and accuracy of the control system. The result of practical tests verifies that the system possesses very good effects of adaptive control, and indicates that by adopting adaptive control method may provide valuable reference for improving the stability of optical fiber power measurement.
出处
《自动化仪表》
CAS
北大核心
2014年第5期84-87,共4页
Process Automation Instrumentation
基金
重庆市自然科学基金资助项目(编号:CQCSTC2011jjA40028CQ)
关键词
光纤功率计
光电探测器
ARM
滑动滤波
自适应控制
Optical fiber power meter Photoelectric detector ARM Sliding filtering Self-adaptive control
