Signal detection and approximate error of reflecting fiber-optic current sensing

LI Jian-zhong; LI Ze-ren; DENG Xiang-yang; WANG Rong-bo; ZHANG Deng-hong; TIAN Jian-hua

doi:10.13873/j.1000-97872010.01.031

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Signal detection and approximate error of reflecting fiber-optic current sensing

更新时间：2025-09-11

- Signal detection and approximate error of reflecting fiber-optic current sensing
- Vol. 29, Issue 1, Pages: 87-90(2010)
- 作者机构：
  
  中国工程物理研究院流体物理研究所
- 作者简介：
- 基金信息：
- DOI：10.13873/j.1000-97872010.01.031
  CLC： TP212.14
- Published：2010
- 稿件说明：
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[1]李建中,李泽仁,邓向阳,王荣波,张登洪,田建华.反射式光纤电流传感的锁相检测法与近似误差[J].传感器与微系统,2010,29(01):87-90.

LI Jian-zhong, LI Ze-ren, DENG Xiang-yang, et al. Signal detection and approximate error of reflecting fiber-optic current sensing[J]. 2010, 29(1): 87-90.
[1]李建中,李泽仁,邓向阳,王荣波,张登洪,田建华.反射式光纤电流传感的锁相检测法与近似误差[J].传感器与微系统,2010,29(01):87-90. DOI： 10.13873/j.1000-97872010.01.031.

LI Jian-zhong, LI Ze-ren, DENG Xiang-yang, et al. Signal detection and approximate error of reflecting fiber-optic current sensing[J]. 2010, 29(1): 87-90. DOI： 10.13873/j.1000-97872010.01.031.

摘要

对反射式Sagnac型全光纤电流传感器中光信号的检测方法进行了深入的分析

并对固有的小角近似误差进行了充分的理论分析和数值模拟。针对反射式光纤电流传感器中极其特殊的信号检测要求

采用了锁相检测法来处理传感信号。商用化的光纤电流传感器的误差一般要求小于0.2%

而在各类检测方法的信号处理中

一个必须的步骤是sinθ≈θ

该步骤造成的小角近似误差极大地影响了整个系统的测量精度。通过对这2个问题进行深入的分析与模拟

对解决光纤电流传感器的检测方法设计、测量精度、灵敏度等问题提供了较大的参考价值。

Abstract

The optical signal detection of fiber-optic current transducer（FOCT）

based on the in-line Sagnac interferometer

is analyzed in detail.The theoretical analysis and digital simulation of approximate error are also developed sufficiently.The phase-locked detection method used in the special system is described.The error of commercial FOCT should be less than 0.2 %

sin θ≈θ

which is usefull and necessary for signal processing.It is one of the bad factors that lower the measurement precision.The detailed analysis and simulation of the two subjects are valuable for solving a great deal of problems

such as signal detection

measurement precision

measurement sensitivity

et al.

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references

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基于LabVIEW平台的锁相放大器在管道泄漏检测中的应用 [J]. 杭利军,何存富,吴斌,蔡栋生. 北京工业大学学报 . 2008(03)

基于光纤传感的旋转叶片振动检测技术研究 [J]. 方志强,段发阶,张玉贵,叶声华. 传感器与微系统 . 2008(02)

一种新型光纤电流互感器 [J]. 娄凤伟,郑绳楦,王海明. 光学技术 . 2006(05)

一种新型全数字闭环光纤电流互感器方案 [J]. 王夏霄,张春熹,张朝阳,邬战军. 电力系统自动化 . 2006(16)

组合式光学电压/电流互感器的研究与开发 [D]. 罗苏南. 华中科技大学 2000

光学电流传感器数字信号处理系统的研究 [D]. 张艳. 华中科技大学 2004

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