Signal processing for all fiber optical current transducer

裴焕斗; 祖静; 陈鸿

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Signal processing for all fiber optical current transducer

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摘要

The work principle of all fiber optical current transducer (AFOCT) was introduced. By analyzing the characteristic of photo-detector’s output, a measurement and signal processing scheme based on sine wave modulation and demodulation was put forward for eliminating the influence of light intensity change and modulation degree change. A digital signal processing system and a calibration scheme were also advanced. The experimental data show that the mean ratio error is 0.016 74% for direct current and 0.035% for alternating current, and the correlation coefficient of linearity is up to 0.999 982 4, meeting the precision requirement of 0.2 grade. Stability experiments and temperature drift experiments show the AFOCT has a better stable capability.

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来源
《中南大学学报》 |2008年第s2期|P.404-408|共5页
作者
裴焕斗; 祖静; 陈鸿;
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作者单位

School;

of;

Information;

and;

Communication;

Engineering,;

North;

University;

of;

China;

Key;

Laboratory;

of;

Instrumentation;

Science;

and;

Dynamic;

Measurement,;

North;

University;

of;

China,;

Ministry;

of;

Education;

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原文格式 PDF
正文语种 CHI
中图分类 TP212;
关键词
fiber; optical; current; transducer; demodulation; signal; processing; ratio; error;

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Signal processing for all fiber optical current transducer

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