CN113790743B - 用于光纤光栅传感***的波长解调算法 - Google Patents

用于光纤光栅传感***的波长解调算法 Download PDF

Info

Publication number
CN113790743B
CN113790743B CN202110873793.8A CN202110873793A CN113790743B CN 113790743 B CN113790743 B CN 113790743B CN 202110873793 A CN202110873793 A CN 202110873793A CN 113790743 B CN113790743 B CN 113790743B
Authority
CN
China
Prior art keywords
reflection spectrum
lambda
sequence
wavelength
function
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202110873793.8A
Other languages
English (en)
Other versions
CN113790743A (zh
Inventor
杨华东
王紫超
刘志昂
朱浩
郑建新
杨切
周仁忠
代百华
李�浩
周浩
王永威
孙南昌
朱金柱
陈园
李焜耀
吕丹枫
吕昕睿
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CCCC Second Harbor Engineering Co
CCCC Wuhan Harbour Engineering Design and Research Institute Co Ltd
Original Assignee
CCCC Second Harbor Engineering Co
CCCC Wuhan Harbour Engineering Design and Research Institute Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by CCCC Second Harbor Engineering Co, CCCC Wuhan Harbour Engineering Design and Research Institute Co Ltd filed Critical CCCC Second Harbor Engineering Co
Priority to CN202110873793.8A priority Critical patent/CN113790743B/zh
Publication of CN113790743A publication Critical patent/CN113790743A/zh
Application granted granted Critical
Publication of CN113790743B publication Critical patent/CN113790743B/zh
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01DMEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/26Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
    • G01D5/268Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light using optical fibres
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01DMEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/26Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
    • G01D5/32Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light
    • G01D5/34Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells
    • G01D5/353Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells influencing the transmission properties of an optical fibre
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01DMEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/26Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
    • G01D5/32Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light
    • G01D5/34Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells
    • G01D5/36Forming the light into pulses
    • G01D5/38Forming the light into pulses by diffraction gratings
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F17/00Digital computing or data processing equipment or methods, specially adapted for specific functions
    • G06F17/10Complex mathematical operations
    • G06F17/15Correlation function computation including computation of convolution operations
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02DCLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00Reducing energy consumption in communication networks
    • Y02D30/70Reducing energy consumption in communication networks in wireless communication networks

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Mathematical Physics (AREA)
  • Computational Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Mathematical Analysis (AREA)
  • Mathematical Optimization (AREA)
  • Pure & Applied Mathematics (AREA)
  • Data Mining & Analysis (AREA)
  • Algebra (AREA)
  • Databases & Information Systems (AREA)
  • Software Systems (AREA)
  • General Engineering & Computer Science (AREA)
  • Computing Systems (AREA)
  • Optical Transform (AREA)

Abstract

本发明公开了一种用于光纤光栅传感***的波长解调算法,包括以下步骤:S1、采集经过光纤光栅调制后的反射光谱,对反射光谱进行预处理,得到反射光谱函数f0(λ);S2、以步长d1在光源带宽范围内构建虚拟反射光谱函数序列S1(n),将序列S1(n)中每个光谱函数与反射光谱函数f0(λ)进行互相关运算,得到一个相关系数值序列C1(n),找出C1(n)序列中最大值对应的序列S1(n)中的光谱函数f1(λ),记录f1(λ)对应的虚拟反射光谱波长值λ1。本发明解调***结构简单,将对硬件设备的要求转化为构建虚拟函数进行互相关运算,***成本低。

Description

用于光纤光栅传感***的波长解调算法
技术领域
本发明涉及光学传感技术领域。更具体地说,本发明涉及一种用于光纤光栅传感***的波长解调算法。
背景技术
光纤光栅传感器作为一种波长调制型光纤传感器,除了具有抗电磁干扰、耐高温耐腐蚀、复用能力强、灵敏度高、轻便灵活等优点外,还具有其独特的优势:波长调制的传感信号,不会受到传感***信号强度变化等产生的影响。基于上述优势,光纤光栅传感器被广泛应用于航空航天、土木工程、石油石化等领域的温度、应变、位移等多种物理量的监测中。
如上所述,作为波长调制型传感器,实现波长的精确解调是光纤光栅传感***的关键技术,目前比较常规的方式有两种:(1)采用窄线宽的可调谐激光器或者宽带光源加可调谐滤波器扫描得到光纤光栅反射谱的中心波长。(2)采用CCD的光谱探测器得到光纤光栅反射谱,然后寻峰求出光纤光栅的中心波长。以上两种方法对硬件精度的要求都比较高,同时波长的精度控制易受外界温度的影响。
专利CN108426594B公开了一种相关算法的光纤光栅反射谱解调***,该***将光谱仪采集的高精度反射谱作为基序列,然后将解调仪采集的光纤光栅反射谱经过预寻峰后与基序列进行相关运算,求解光纤光栅中心波长。该方法较以上两种方法有所改进,测量精度更高,但所使用的高精度光谱仪、解调仪等成本很高,***也较为复杂。
基于以上现有方法的测量问题,需要提出一种解调精度高、速度快、成本低的波长解调算法,用于光纤光栅传感***的实时波长解调。
发明内容
本发明的目的是针对现有光纤光栅波长解调***存在的技术问题,本发明提出一种解调精度高、解调速度快、解调***成本低的波长解调算法,通过构建光纤光栅虚拟反射光谱函数与光电探测器得到的实际反射光谱曲线进行互相关计算,通过相关系数的定位波长值,同时采用变步长算法降低运算,在较大波长范围内实现光纤光栅波长的快速高精度解调。
为了实现根据本发明的这些目的和其它优点,提供了一种用于光纤光栅传感***的波长解调算法,包括以下步骤:
S1、采集经过光纤光栅调制后的反射光谱,对反射光谱进行预处理,得到反射光谱函数f0(λ);
S2、以步长d1在光源带宽范围内构建虚拟反射光谱函数序列S1(n),将序列S1(n)中每个光谱函数与反射光谱函数f0(λ)进行互相关运算,得到一个相关系数值序列C1(n),找出C1(n)序列中最大值对应的序列S1(n)中的光谱函数f1(λ),记录f1(λ)对应的虚拟反射光谱波长值λ1
S3、减小步长到d2,在(λ1-2d1,λ1+2d1)范围内构建虚拟反射光谱函数序列S2(n),将序列S2(n)中每个光谱函数与反射光谱函数f0(λ)进行互相关运算,得到一个相关系数值序列C2(n),找出C2(n)序列中最大值对应的序列S2(n)中的光谱函数f2(λ),记录f2(λ)对应的虚拟反射光谱波长值λ2
S4、依次类推,按照上述步骤再减小步长,进行互相关运算,直到求得的波长值满足精度要求,此时停止运算,最后一步求得的虚拟反射光谱波长值即为解调波长值。
优选的是,所述S1中反射光谱的预处理具体为:通过三次样条插值拟合算法和小波阈值去噪方法对所得到的反射光谱数据进行预处理。
优选的是,所述S1中反射光谱的采集和调制具体包括:光源发出的光经耦合器传输到光纤光栅阵列中,调制后的反射光再经耦合器返回,最后经过光电探测和采集后,对得到光纤光栅反射光谱进入信号处理单元进行解调处理。
优选的是,所述光源在进入耦合器之间先经过隔离器。
优选的是,所述S2、S3、S4中,任意一个虚拟反射光谱函数与反射光谱函数f0(λ)的互相关运算公式为:
Figure BDA0003189674470000021
本发明至少包括以下有益效果:
1、本发明提出的光纤光栅波长解调算法所涉及的解调***结构简单,将对硬件设备的要求转化为构建虚拟函数进行互相关运算,***成本低。
2、本发明提出的光纤光栅波长解调算法通过变步长算法可大大降低计算量,同时不降低解调精度,实现快速高精度解调。
本发明的其它优点、目标和特征将部分通过下面的说明体现,部分还将通过对本发明的研究和实践而为本领域的技术人员所理解。
附图说明
图1是本发明波长解调***原理图;
图2是本发明解调算法流程图;
图3是实施例1的S1中反射光谱进行预处理后波形图;
图4是实施例1的S2中100pm步长的互相关运算结果;
图5是实施例1的S3中1pm步长互相关运算结果。
具体实施方式
下面结合附图对本发明进行详细、完整的说明。本领域普通技术人员在基于这些说明的情况下将能够实现本发明。在结合附图对本发明进行说明前,需要特别指出的是:本发明中在包括下述说明在内的各部分中所提供的技术方案和技术特征,在不冲突的情况下,这些技术方案和技术特征可以相互组合。
此外,下述说明中涉及到的本发明的实施例通常仅是本发明一部分的实施例,而不是全部的实施例。因此,基于本发明中的实施例,本领域普通技术人员在没有做出创造性劳动的前提下所获得的所有其他实施例,都应当属于本发明保护的范围。
以下结合附图及实施对本发明作进一步的详细说明,其具体实施过程如下:
如图2示,本发明提供一种用于光纤光栅传感***的波长解调算法,包括以下步骤:
S1、采集经过光纤光栅调制后的反射光谱,对反射光谱进行预处理,得到反射光谱函数f0(λ);
S2、以较大步长d1在光源带宽范围内构建虚拟反射光谱函数序列S1(n),将序列S1(n)中每个光谱函数与反射光谱函数f0(λ)进行互相关运算,得到一个相关系数值序列C1(n),找出C1(n)序列中最大值对应的序列S1(n)中的光谱函数f1(λ),记录f1(λ)对应的虚拟反射光谱波长值λ1
S3、减小步长到d2,在(λ1-2d1,λ1+2d1)范围内构建虚拟反射光谱函数序列S2(n),将序列S2(n)中每个光谱函数与反射光谱函数f0(λ)进行互相关运算,得到一个相关系数值序列C2(n),找出C2(n)序列中最大值对应的序列S2(n)中的光谱函数f2(λ),记录f2(λ)对应的虚拟反射光谱波长值λ2
S4、依次类推,按照上述步骤再减小步长,进行互相关运算,直到求得的波长值满足精度要求,此时停止运算,最后一步求得的虚拟反射光谱波长值即为解调波长值。所述的S1、S2、S3、S4中,各个光谱函数的自变量序列相同,可进行互相关运算。
本技术方案还可以包括以下技术细节,以更好地实现技术效果:所述S1中反射光谱的预处理具体为:通过三次样条插值拟合算法和小波阈值去噪方法对所得到的反射光谱数据进行预处理。
在上述方式中,先对光谱数据采用三次样条插值增加采样点,提高波长分辨率,然后采用五层小波去噪算法进行阈值去噪处理。
本技术方案还可以包括以下技术细节,以更好地实现技术效果:所述S1中反射光谱的采集和调制具体包括:如图1所示,光源发出的光经耦合器传输到光纤光栅阵列中,调制后的反射光再经耦合器返回,最后经过光电探测和采集后,对得到光纤光栅反射光谱进入信号处理单元进行解调处理。
本技术方案还可以包括以下技术细节,以更好地实现技术效果:所述光源在进入耦合器之间先经过隔离器,保证光单向传输,防止反射回来的光损坏光源。
本技术方案还可以包括以下技术细节,以更好地实现技术效果:所述的S2、S3、S4中,任意一个虚拟反射光谱函数与反射光谱函数f0(λ)的互相关运算公式为:
Figure BDA0003189674470000041
实施例1
如解调一个波长为1546.916nm的光栅波长:
S1、采集经过光纤光栅调制后的反射光谱,对反射光谱进行预处理后波形图如下,并得到反射光谱函数序列值f0(λ);
S2、以较大步长100pm在40nm光源带宽范围内构建虚拟反射光谱函数序列S1(n),将序列S1(n)中每个光谱函数与反射光谱函数f0(λ)进行互相关运算,得到一个相关系数值序列C1(n),找出C1(n)序列中最大值对应的序列S1(n)中的光谱函数f1(λ),记录f1(λ)对应的虚拟反射光谱波长值λ1=1546.900nm。
S3、减小步长到1pm,在(1546.900-0.2nm,1546.900+0.2nm)范围内构建虚拟反射光谱函数序列S2(n),将序列S2(n)中每个光谱函数与反射光谱函数f0(λ)进行互相关运算,得到一个相关系数值序列C2(n),找出C2(n)序列中最大值对应的序列S2(n)中的光谱函数f2(λ),记录f2(λ)对应的虚拟反射光谱波长值λ2=1546.916nm,即为所求光栅波长值;
尽管本发明的实施方案已公开如上,但其并不仅仅限于说明书和实施方式中所列运用,它完全可以被适用于各种适合本发明的领域,对于熟悉本领域的人员而言,可容易地实现另外的修改,因此在不背离权利要求及等同范围所限定的一般概念下,本发明并不限于特定的细节和这里示出与描述的实施例。

Claims (5)

1.一种用于光纤光栅传感***的波长解调算法,其特征在于,包括以下步骤:
S1、采集经过光纤光栅调制后的反射光谱,对反射光谱进行预处理,得到反射光谱函数f0(λ);
S2、以步长d1在光源带宽范围内构建虚拟反射光谱函数序列S1(n),将序列S1(n)中每个光谱函数与反射光谱函数f0(λ)进行互相关运算,得到一个相关系数值序列C1(n),找出C1(n)序列中最大值对应的序列S1(n)中的光谱函数f1(λ),记录f1(λ)对应的虚拟反射光谱波长值λ1
S3、减小步长到d2,在(λ1-2d1,λ1+2d1)范围内构建虚拟反射光谱函数序列S2(n),将序列S2(n)中每个光谱函数与反射光谱函数f0(λ)进行互相关运算,得到一个相关系数值序列C2(n),找出C2(n)序列中最大值对应的序列S2(n)中的光谱函数f2(λ),记录f2(λ)对应的虚拟反射光谱波长值λ2
S4、依次类推,按照上述步骤再减小步长,进行互相关运算,直到求得的波长值满足精度要求,此时停止运算,最后一步求得的虚拟反射光谱波长值即为解调波长值。
2.如权利要求1所述的用于光纤光栅传感***的波长解调算法,其特征在于,所述S1中反射光谱的预处理具体为:通过三次样条插值拟合算法和小波阈值去噪方法对所得到的反射光谱数据进行预处理。
3.如权利要求1或2所述的用于光纤光栅传感***的波长解调算法,其特征在于,所述S1中反射光谱的采集和调制具体包括:光源发出的光经耦合器传输到光纤光栅阵列中,调制后的反射光再经耦合器返回,最后经过光电探测和采集后,对得到光纤光栅反射光谱进入信号处理单元进行解调处理。
4.如权利要求3所述的用于光纤光栅传感***的波长解调算法,其特征在于,所述光源在进入耦合器之间先经过隔离器。
5.如权利要求1所述的用于光纤光栅传感***的波长解调算法,其特征在于,所述的S2、S3、S4中,任意一个虚拟反射光谱函数与反射光谱函数f0(λ)的互相关运算公式为:
Figure FDA0003189674460000011
CN202110873793.8A 2021-07-30 2021-07-30 用于光纤光栅传感***的波长解调算法 Active CN113790743B (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110873793.8A CN113790743B (zh) 2021-07-30 2021-07-30 用于光纤光栅传感***的波长解调算法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110873793.8A CN113790743B (zh) 2021-07-30 2021-07-30 用于光纤光栅传感***的波长解调算法

Publications (2)

Publication Number Publication Date
CN113790743A CN113790743A (zh) 2021-12-14
CN113790743B true CN113790743B (zh) 2023-04-25

Family

ID=79181447

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110873793.8A Active CN113790743B (zh) 2021-07-30 2021-07-30 用于光纤光栅传感***的波长解调算法

Country Status (1)

Country Link
CN (1) CN113790743B (zh)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101650509A (zh) * 2009-09-15 2010-02-17 南京航空航天大学 基于级联长周期光纤光栅的Bragg光栅高速解调***
WO2010064981A1 (en) * 2008-12-01 2010-06-10 Telefonaktiebolaget L M Ericsson (Publ) Methods and devices for wavelength alignment in wdm-pon
EP2779487A1 (en) * 2013-03-15 2014-09-17 Fujitsu Limited Optical signal demodulator, optical signal demodulating method, and optical add-drop multiplexer
CN108426594A (zh) * 2016-05-24 2018-08-21 北京信息科技大学 一种相关算法的光纤光栅反射谱解调***
CN108955734A (zh) * 2018-06-08 2018-12-07 武汉理工大学 一种光纤f-p温度/压力复合传感器的腔长解调方法

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010064981A1 (en) * 2008-12-01 2010-06-10 Telefonaktiebolaget L M Ericsson (Publ) Methods and devices for wavelength alignment in wdm-pon
CN101650509A (zh) * 2009-09-15 2010-02-17 南京航空航天大学 基于级联长周期光纤光栅的Bragg光栅高速解调***
EP2779487A1 (en) * 2013-03-15 2014-09-17 Fujitsu Limited Optical signal demodulator, optical signal demodulating method, and optical add-drop multiplexer
CN108426594A (zh) * 2016-05-24 2018-08-21 北京信息科技大学 一种相关算法的光纤光栅反射谱解调***
CN108955734A (zh) * 2018-06-08 2018-12-07 武汉理工大学 一种光纤f-p温度/压力复合传感器的腔长解调方法

Also Published As

Publication number Publication date
CN113790743A (zh) 2021-12-14

Similar Documents

Publication Publication Date Title
CN108955734B (zh) 一种光纤f-p温度/压力复合传感器的腔长解调方法
CN107402082B (zh) 一种布里渊散射信号处理方法及其分布式光纤传感***
CN108534811B (zh) 一种短腔光纤法珀传感器的腔长解调算法
CN103487074B (zh) 利用三点寻峰算法处理fbg传感信号的方法
CN103017934B (zh) 消除分布式拉曼测温***波长色散的自修正方法
CN108562237B (zh) 一种采用hcn气室在光频域反射传感***中进行光谱校准的装置和方法
CN111006786B (zh) 基于分布式光纤拉曼传感***的双路高精度温度解调方法
CN105973282A (zh) 光纤f-p传感器腔长小波相位提取解调方法
CN106017522A (zh) 一种光纤f-p传感器的快速高精度信号解调方法
CN115046469B (zh) 一种面向光纤白光干涉的干涉条纹包络提取方法
CN108956534B (zh) 一种基于开放腔法珀干涉仪的折射率测量方法
CN109916434A (zh) 一种光纤法珀传感器腔长多倍频相关解调方法
CN113358239A (zh) 一种基于fbg的波长特征识别方法
CN114674352B (zh) 基于瑞利散射光谱非相似性的分布式扰动传感和解调方法
CN109282805B (zh) 用有源光谱滤波降低光纤陀螺随机游走系数的装置和方法
CN108426594B (zh) 一种相关算法的光纤光栅反射谱解调***
CN113790743B (zh) 用于光纤光栅传感***的波长解调算法
CN112050942B (zh) 基于相位补偿的光纤干涉光谱腔长校正方法
CN110793557B (zh) 用于短腔光纤法布里-珀罗传感器的腔长解调方法
CN116105776A (zh) 光纤法珀传感器腔长高精度原位标定与高速实时解调的方法与装置
CN110057386A (zh) 基于全光谱的光纤fp传感器的解调方法及其解调装置
CN115310304A (zh) 一种基于改进svd的干式空心电抗器光纤传感降噪方法
CN109668582B (zh) 应用于复用型fbg多峰反射谱的高速解调方法
CN113325574A (zh) 一种光纤法珀传感器双光源腔长匹配解调方法
Harasim et al. Accuracy improvement of Fiber Bragg Grating peak wavelength demodulation using wavelet transform and various center wavelength detection algorithms

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
TA01 Transfer of patent application right

Effective date of registration: 20220216

Address after: 430048 No. 11 Jinyinhu Road, Dongxihu District, Wuhan City, Hubei Province

Applicant after: CCCC SECOND HARBOR ENGINEERING Co.,Ltd.

Applicant after: CCCC WUHAN HARBOUR ENGINEERING DESIGN AND RESEARCH Co.,Ltd.

Address before: 430048 No. 11 Jinyinhu Road, Dongxihu District, Wuhan City, Hubei Province

Applicant before: CCCC SECOND HARBOR ENGINEERING Co.,Ltd.

TA01 Transfer of patent application right
GR01 Patent grant
GR01 Patent grant