自动化仪表
自動化儀錶
자동화의표
PROCESS AUTOMATION INSTRUMENTATION
2014年
5期
84-87
,共4页
光纤功率计%光电探测器%ARM%滑动滤波%自适应控制
光纖功率計%光電探測器%ARM%滑動濾波%自適應控製
광섬공솔계%광전탐측기%ARM%활동려파%자괄응공제
Optical fiber power meter%Photoelectric detector%ARM%Sliding filtering%Self-adaptive control
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。
針對普通光纖功率計測量精度低、測量穩定性差等特點，採用硬件反饋電路對輸入光信號進行調製和解調。攷慮到檢測光彊髮生變化時易導緻光纖功率計測量齣現較大誤差的特性，提齣瞭軟件滑動濾波法與最小二乘法相結閤的方式確定自適應控製數字濾波方案。自適應控製繫統引入ARM處理器也提高瞭控製繫統的處理速度和檢測精度。實測結果驗證瞭該繫統具有很好的自適應控製的作用，錶明採用自適應控製的方法為光纖功率值測量穩定性的提高提供瞭一種很好的參攷。
침대보통광섬공솔계측량정도저、측량은정성차등특점，채용경건반궤전로대수입광신호진행조제화해조。고필도검측광강발생변화시역도치광섬공솔계측량출현교대오차적특성，제출료연건활동려파법여최소이승법상결합적방식학정자괄응공제수자려파방안。자괄응공제계통인입ARM처리기야제고료공제계통적처리속도화검측정도。실측결과험증료해계통구유흔호적자괄응공제적작용，표명채용자괄응공제적방법위광섬공솔치측량은정성적제고제공료일충흔호적삼고。
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.
