CN107014412A - 一种双干涉仪匹配解调的光纤传感测量方法及装置 - Google Patents
一种双干涉仪匹配解调的光纤传感测量方法及装置 Download PDFInfo
- Publication number
- CN107014412A CN107014412A CN201710248395.0A CN201710248395A CN107014412A CN 107014412 A CN107014412 A CN 107014412A CN 201710248395 A CN201710248395 A CN 201710248395A CN 107014412 A CN107014412 A CN 107014412A
- Authority
- CN
- China
- Prior art keywords
- interferometer
- sensing
- signal
- demodulation
- laser
- 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.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 42
- 230000009977 dual effect Effects 0.000 title claims abstract description 22
- 238000005259 measurement Methods 0.000 claims abstract description 29
- 230000003287 optical effect Effects 0.000 claims abstract description 16
- 238000006243 chemical reaction Methods 0.000 claims description 19
- 238000010276 construction Methods 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 2
- 239000000835 fiber Substances 0.000 abstract description 13
- 230000003595 spectral effect Effects 0.000 abstract description 6
- 239000013307 optical fiber Substances 0.000 abstract description 5
- 230000007547 defect Effects 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 8
- 230000035945 sensitivity Effects 0.000 description 8
- 230000005540 biological transmission Effects 0.000 description 7
- 238000001228 spectrum Methods 0.000 description 6
- 230000003321 amplification Effects 0.000 description 3
- 238000003199 nucleic acid amplification method Methods 0.000 description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 235000009827 Prunus armeniaca Nutrition 0.000 description 2
- 244000018633 Prunus armeniaca Species 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001447 compensatory effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING 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
- G01D5/00—Mechanical 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
- G01D5/26—Mechanical 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
- G01D5/32—Mechanical 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
- G01D5/34—Mechanical 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
- G01D5/353—Mechanical 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
- G01D5/35306—Mechanical 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 using an interferometer arrangement
- G01D5/35309—Mechanical 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 using an interferometer arrangement using multiple waves interferometer
- G01D5/35312—Mechanical 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 using an interferometer arrangement using multiple waves interferometer using a Fabry Perot
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING 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
- G01D5/00—Mechanical 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
- G01D5/26—Mechanical 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
- G01D5/32—Mechanical 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
- G01D5/34—Mechanical 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
- G01D5/353—Mechanical 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
- G01D5/35306—Mechanical 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 using an interferometer arrangement
- G01D5/35325—Mechanical 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 using an interferometer arrangement using interferometer with two arms in reflection, e.g. Mickelson interferometer
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING 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
- G01D5/00—Mechanical 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
- G01D5/26—Mechanical 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
- G01D5/32—Mechanical 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
- G01D5/34—Mechanical 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
- G01D5/353—Mechanical 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
- G01D5/35306—Mechanical 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 using an interferometer arrangement
- G01D5/35329—Mechanical 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 using an interferometer arrangement using interferometer with two arms in transmission, e.g. Mach-Zender interferometer
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Instruments For Measurement Of Length By Optical Means (AREA)
Abstract
本发明涉及一种双干涉仪匹配解调的光纤传感测量方法及装置，属于光纤传感技术领域。该方法使用两只匹配的光纤干涉仪，具有一致的光谱特性，且都工作在线性区间。传感干涉仪用于将被测量转换为光功率的变化，参考干涉仪与被测量隔离。传感干涉仪与参考干涉仪的输出信号求差即可解调出被测量并消除共模干扰，该方法有效解决了传统正交工作点直接测量法易受光源波长、光强波动及光路传输损耗等因素干扰的缺陷。可以对双光束干涉仪及多光束干涉仪进行动态信号和静态信号的解调。具有测量精度高，带宽宽，结构简洁，成本低等特点，且属于被动解调，响应快、解调频率高，适合小振幅信号的快速精确测量。
Description
技术领域
本发明涉及一种双干涉仪匹配解调的光纤传感测量方法及装置，属于光纤传感技术领域。
背景技术
对光纤干涉型传感器(如Michelson、Mach-Zehnder、Fabry-Perot、外腔式Fabry-Perot等)进行解调的方案主要有相位载波(PGC)法、基于3×3光纤耦合器的零差解调法、正交信号解调法及正交工作点直接测量法等。这些测量方法可以用来解调干涉仪的输出信号，满足不同条件下的测试需要。
正交工作点直接测量法是利用干涉型传感器干涉条纹的线性段，将传感器光程差的变化转换为输出光光强变化的一种解调方法。相较于其余几种常见的解调方法，正交工作点直接测量法简单，响应速度快，灵敏度高，适合小振幅信号的快速测量，且既可以测量静态信号，也可以测量动态信号。其不足之处在于需要将干涉仪保持在正交工作点上，且测量范围较窄，最重要的是其极易受到环境因素的干扰。
正交工作点直接测量法依赖于对输出光光强的直接检测，而传输光纤、探测器、耦合器等光学器件的扰动都会引起输出光强的改变，而且激光器的波长和光强受环境温度等因素的影响也会产生漂移，对测量结果产生不利影响。为了克服正交工作点直接测量法的缺陷，消除干扰信号，已经有一些研究对其进行了完善和改良：在2001年的时候，美国弗吉尼亚理工学院的王安波等人提出了一种使用宽带光源的基于自校正干涉强度解调法(Self-Calibrated Interferometric–Intensity-Based)，将从传感器反射的宽带光分为两部分，通过对被测量不敏感的输出信号补偿光源光强的波动，获取准确的被测信号[AnboWang et al,Self-Calibrated Interferometric–Intensity-Based Optical FiberSensors,JOURNAL OF LIGHTWAVE TECHNOLOGY,2001,19(10):1495～1501]；2013年时，童杏林等人提出了一种自校准激光光源模块，通过一个闭环电路来控制激光器的输出功率的稳定，从而保证整个解调系统的测量精度[童杏林等.光纤F-P声发射传感器的信号解调系统：中国专利,CN103308146A.2013-09-18]。但是，这些方法也都存在一些局限性，王安波等人提出的方法使用的光源为LED或SLED，光源的输出功率有限，影响整个系统的信噪比，测量精度较低；童杏林等人提出的方法使用一个反馈电路调节光纤FP可调谐滤波器，从而达到控制激光器输出的目的，然而，光纤FP可调谐滤波器涉及到了压电陶瓷元件，受压电陶瓷的磁滞效应及其自身稳定性的影响，对激光器的调节存在滞后和误差，反馈电路自身需要进行一些运算，限制了其响应速度，会对解调精度带来不利影响。此外，还存在别的一些稳定静态工作点的方法，如通过调节激光器的温控来调节其输出激光的参数[江毅.高级光纤传感技术.北京:科学出版社,2009:171]，但这些方法并不能补偿激光器微小的波长漂移。
发明内容
本发明的目的是为了解决现有正交工作点直接测量法易受干扰信号的影响而导致灵敏度不够高的问题，提出一种双干涉仪匹配解调的光纤传感测量方法及装置。该技术使用双干涉仪进行无源补偿，消除光谱功率和波长的微小波动，以及外界共模干扰的影响，提高测量灵敏度。
本发明的目的是通过下述技术方案实现的。
一种双干涉仪匹配解调的光纤传感测量方法，具体步骤如下：
步骤一、在现有正交工作点直接测量法的基础上引入参考干涉仪；
步骤二、双干涉仪匹配解调；正交工作点直接测量法中的传感干涉仪用于采集包含干扰信息的待测信号；参考干涉仪用于采集干扰信号；
步骤三、将步骤二传感干涉仪和参考干涉仪获取的信号通过光电转换模块转换为电信号，而后使用减法器将两路信号求差，即可得到消除干扰后的待测信号。
实现一种双干涉仪匹配解调的光纤传感测量方法的装置，包括：激光器，耦合器组，传感干涉仪，参考干涉仪，光电转换模块，减法器和温度控制模块；
温度控制模块将激光器的输出光波长移动并稳定到两个干涉仪的线性工作区，激光器发射的激光通过耦合器组注入传感干涉仪和参考干涉仪，传感干涉仪和参考干涉仪输出的光信号经过光电转换模块转换放大后，通过减法器做减法运算并输出解调信号。
传感干涉仪和参考干涉仪包括：双光束干涉仪和多光束干涉仪两种类型。
双光束干涉仪包括Michelson干涉仪(MI)、Mach-Zehnder干涉仪(MZI)、低精细度的外腔式Fabry-Perot干涉仪(EFPI)，其干涉条纹为正弦信号，静态工作点为正弦信号的拐点；
多光束干涉仪是指高精细度的外腔式Fabry-Perot干涉仪(EFPI)；
干涉仪可以用透射光，也可以用反射光。其干涉条纹不再是正弦信号的形式，其静态工作点仍为曲线的拐点，相较于双光束干涉仪，多光束干涉仪灵敏度要高的多，但动态范围较小，且干涉仪的精细度越高，灵敏度也越高，动态范围越窄，实践使用中需根据应用环境选择合适的精细度。
有益效果
本发明的一种双干涉仪匹配解调的光纤传感测量技术，采用对待测量不敏感的干涉仪进行信号补偿，解决了传统正交工作点直接测量法易受光源波长、光强波动及光路的传输损耗等因素干扰的缺陷，提高了测量灵敏度。属于被动解调，采用无源补偿技术，不包含有源的信号调制器件，所解调信号的频率只受信号采集系统的限制，带宽宽，灵敏度高，适用范围广。可以对双光束干涉仪及多光束干涉仪进行动态信号(如振动信号、声信号)和静态信号(如压力信号、应变信号)的解调。解调系统简洁，成本低，具有良好的工程应用前景。
附图说明
图1为本发明解调低精细度EFPI传感干涉仪的一种典型系统结构示意图；
图2为本发明解调MZI传感干涉仪的一种典型系统结构示意图；
图3为本发明解调MI传感干涉仪的一种典型系统结构示意图；
图4为本发明涉及的双光束传感干涉仪及参考干涉仪的干涉谱示意图，图中：A区域为用以调制信号的线性区，A区域的中点B1、B2分别为传感干涉仪和参考干涉仪的静态工作点；
图5为本发明解调高精细度EFPI传感干涉仪透射信号的一种典型系统结构示意图；
图6为本发明解调高精细度EFPI传感干涉仪反射信号的一种典型系统结构示意图；
图7为本发明涉及的高精细度高稳定EFPI的一种典型结构示意图；
图8为本发明涉及的多光束传感干涉仪及参考干涉仪的干涉谱示意图，图中：A区域为用以调制信号的线性区，A区域的中点B1、B2分别为传感干涉仪和参考干涉仪的静态工作点。
其中，1为激光器，2为耦合器组，3为低精细度EFPI传感干涉仪，4为低精细度EFPI参考干涉仪，5为光电转换模块，6为减法器，7为温度控制模块，8为MZI传感干涉仪，9为MZI参考干涉仪，10为MI传感干涉仪，11为MI参考干涉仪，12为高精细度EFPI传感干涉仪，13为高精细度EFPI参考干涉仪，14为光束准直模块，15为镀有高反膜的反射镜，16为零膨胀系数支撑结构。
具体实施方案
下面结合说明书附图以及实施例对本发明做进一步的说明。
实施例1
本发明可以用来解调双光束干涉仪所测量的动态信号或静态信号。
一种双干涉仪匹配解调的光纤传感测量方法，具体步骤如下：
步骤一、在现有正交工作点直接测量法的基础上引入参考干涉仪；
步骤二、双干涉仪匹配解调的光纤传感测量法中的传感干涉仪用于采集包含干扰的待测信号；参考干涉仪用于采集干扰信号；
步骤三、将步骤二传感器和参考干涉仪获取的信号通过光电转换模块转换为电信号，而后使用减法器将两路信号求差，即可得消除干扰后的待测信号；
步骤四、所采用的的双光束干涉仪可以为低精细度EFPI、MI、MZI，根据不同类型的干涉仪选择透射光或反射光作为信号。
实现一种双干涉仪匹配解调的光纤传感测量方法的装置，包括：激光器1，耦合器组2，传感干涉仪3或8或10，参考干涉仪4或9或11，光电转换模块5，减法器6和温度控制模块7，如图1、2、3所示。
温度控制模块7将激光器1的输出光波长移动并稳定到两个干涉仪的线性工作区，激光器1发射的激光通过耦合器组2注入传感干涉仪3或8或10和参考干涉仪4或9或11，传感干涉仪和参考干涉仪输出的光信号经过光电转换模块5转换放大后，通过减法器6做减法运算并输出解调信号。
工作过程：一种双干涉仪匹配解调的光纤传感测量技术，包括两个光谱特性一致的干涉仪，其中一个干涉仪对待测信号敏感，作为传感器；另外一个干涉仪与待测量相隔离，作为参考信号源，由于不受待测量的影响，其输出信号反映的是光源波长、光强波动及光路的传输损耗等干扰信息；选择合适波长的激光器，微调激光器的工作波长，使干涉仪的静态工作点位于线性区的中点。图2为本发明涉及的双光束传感干涉仪及参考干涉仪的干涉谱示意图，这两个干涉仪光谱特性保持一致，以满足信号补偿的要求，图中A区域为用以调制信号的线性区，A区域的中点B1、B2分别为传感干涉仪和参考干涉仪的静态工作点，该点为光谱曲线的拐点，即曲线二阶导数的零点。激光经过分束后分别注入两个干涉仪中，将干涉仪的输出光经过光电转换模块转换为两路电信号，将两路信号相减即可得到消除干扰后的待测信号。双干涉仪匹配解调的光纤传感测量技术可以对动态信号和静态信号的进行解调。
实施例2
本发明可以用来解调多光束干涉仪所测量的动态信号或静态信号。
步骤一、在现有正交工作点直接测量法的基础上引入参考干涉仪；
步骤二、双干涉仪匹配解调的光纤传感测量法中的传感干涉仪用于采集包含干扰的待测信号；参考干涉仪用于采集干扰信号；
步骤三、将步骤二传感器和参考干涉仪获取的信号通过光电转换模块转换为电信号，而后使用减法器将两路信号求差，即可得消除干扰后的待测信号；
步骤四、所采用的的多光束干涉仪为高精细度EFPI。
实现一种双干涉仪匹配解调的光纤传感测量方法的装置，包括：激光器1，耦合器组2，高精细度EFPI传感干涉仪12，高精细度EFPI参考干涉仪13，光电转换模块5，减法器6和温度控制模块7，如图5、6所示，其中，图5是本发明解调高精细度EFPI传感干涉仪透射信号的一种典型系统结构，图6是本发明解调高精细度EFPI传感干涉仪反射信号的一种典型系统结构。
图7是本发明涉及的高精细度高稳定EFPI的一种典型结构，光束准直模块14、镀有高反膜的反射镜15、零膨胀系数支撑结构16。由于高精细度EFPI的灵敏度很高，传感器腔长的微小变化都会影响测量结果的准确性，为了消除因环境温度的漂变改变传感器的腔长从而影响测量结果，选取零膨胀系数的材料作为传感器的支撑结构。
温度控制模块7将激光器1的输出光波长移动并稳定到两个干涉仪的线性工作区，激光器1发射的激光通过耦合器组2注入高精细度EFPI传感干涉仪12和高精细度EFPI参考干涉仪13，传感干涉仪和参考干涉仪输出的光信号经过光电转换模块5转换放大后，通过减法器6做减法运算并输出解调信号。
工作过程：一种双干涉仪匹配解调的光纤传感测量技术，包括两个光谱特性一致的干涉仪，其中一个干涉仪对待测信号敏感，作为传感器；另外一个干涉仪与待测量相隔离，作为参考信号源，由于不受待测量的影响，其输出信号反映的是光源波长、光强波动及光路的传输损耗等干扰信息；选择合适波长的激光器，微调激光器的工作波长，使干涉仪的静态工作点位于线性区的中点。图8为本发明涉及的多光束传感干涉仪及参考干涉仪的干涉谱示意图，这两个干涉仪光谱特性保持一致，以满足信号补偿的要求，图中A区域为用以调制信号的线性区，A区域的中点B1、B2分别为传感干涉仪和参考干涉仪的静态工作点，该点为光谱曲线的拐点，即曲线二阶导数的零点。激光经过分束后分别注入两个干涉仪中，将干涉仪的输出光经过光电转换模块转换为两路电信号，将两路信号相减即可得到消除干扰后的待测信号。双干涉仪匹配解调的光纤传感测量技术可以对动态信号和静态信号的进行解调。
最后，以上具体实施方式仅用以声明本发明的技术方案而非限制，只要在本发明的实质精神范围内，对以上实施例的变形都应涵盖在本发明的权利要求范围当中。
Claims (6)
1.一种双干涉仪匹配解调的光纤传感测量方法，其特征在于：具体步骤如下：
步骤一、在现有正交工作点直接测量法的基础上引入参考干涉仪；
步骤二、双干涉仪匹配解调；正交工作点直接测量法中的传感干涉仪用于采集包含干扰信息的待测信号；参考干涉仪用于采集干扰信号；
步骤三、将步骤二传感干涉仪和参考干涉仪获取的信号通过光电转换模块转换为电信号，而后使用减法器将两路信号求差，即可得到消除干扰后的待测信号。
2.实现如权利要求1所述一种双干涉仪匹配解调的光纤传感测量方法的装置，其特征在于：装置包括：激光器(1)，耦合器组(2)，传感干涉仪(3)，参考干涉仪(4)，光电转换模块(5)，减法器(6)和温度控制模块(7)；
温度控制模块(7)将激光器(1)的输出光波长移动并稳定到两个干涉仪的线性工作区，激光器(1)发射的激光通过耦合器组(2)注入传感干涉仪(3)和参考干涉仪(4)，传感干涉仪(3)和参考干涉仪(4)输出的光信号经过光电转换模块(5)转换放大后，通过减法器(6)做减法运算并输出解调信号。
3.如权利要求2所述装置，其特征在于：所述传感干涉仪(3)和参考干涉仪(4)包括：双光束干涉仪和多光束干涉仪两种类型。
4.如权利要求3所述装置，其特征在于：所述双光束干涉仪包括Michelson干涉仪、Mach-Zehnder干涉仪和低精细度的外腔式Fabry-Perot干涉仪。
5.如权利要求3所述装置，其特征在于：所述多光束干涉仪是指高精细度的外腔式Fabry-Perot干涉仪。
6.如权利要求5所述装置，其特征在于：所述多光束干涉仪的支撑结构选取零膨胀系数的材料。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710248395.0A CN107014412A (zh) | 2017-04-17 | 2017-04-17 | 一种双干涉仪匹配解调的光纤传感测量方法及装置 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710248395.0A CN107014412A (zh) | 2017-04-17 | 2017-04-17 | 一种双干涉仪匹配解调的光纤传感测量方法及装置 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107014412A true CN107014412A (zh) | 2017-08-04 |
Family
ID=59448317
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710248395.0A Pending CN107014412A (zh) | 2017-04-17 | 2017-04-17 | 一种双干涉仪匹配解调的光纤传感测量方法及装置 |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107014412A (zh) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112485225A (zh) * | 2019-09-12 | 2021-03-12 | 大连市艾科微波光电子工程研究有限公司 | 基于激光干涉的光纤探头 |
| CN113030547A (zh) * | 2021-03-04 | 2021-06-25 | 哈尔滨工业大学 | 一种基于游标效应的正交臂式mz干涉仪光纤电流传感器 |
| CN116222415A (zh) * | 2022-12-06 | 2023-06-06 | 安徽至博光电科技股份有限公司 | 一种基于单波长-双fp腔的表面形貌测量装置及测量方法 |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101387608A (zh) * | 2008-05-27 | 2009-03-18 | 重庆大学 | 超长珐-珀干涉式气体传感器及基于传感器的气体测试仪 |
| CN105865500A (zh) * | 2016-06-08 | 2016-08-17 | 北京理工大学 | 一种光纤激光干涉型传感器的移相解调法 |
-
2017
- 2017-04-17 CN CN201710248395.0A patent/CN107014412A/zh active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101387608A (zh) * | 2008-05-27 | 2009-03-18 | 重庆大学 | 超长珐-珀干涉式气体传感器及基于传感器的气体测试仪 |
| CN105865500A (zh) * | 2016-06-08 | 2016-08-17 | 北京理工大学 | 一种光纤激光干涉型传感器的移相解调法 |
Non-Patent Citations (1)
| Title |
|---|
| 江毅 唐才杰: "《光纤Fabry-Perot干涉仪原理及应用》", 30 April 2009 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112485225A (zh) * | 2019-09-12 | 2021-03-12 | 大连市艾科微波光电子工程研究有限公司 | 基于激光干涉的光纤探头 |
| CN113030547A (zh) * | 2021-03-04 | 2021-06-25 | 哈尔滨工业大学 | 一种基于游标效应的正交臂式mz干涉仪光纤电流传感器 |
| CN116222415A (zh) * | 2022-12-06 | 2023-06-06 | 安徽至博光电科技股份有限公司 | 一种基于单波长-双fp腔的表面形貌测量装置及测量方法 |
| CN116222415B (zh) * | 2022-12-06 | 2023-11-28 | 安徽至博光电科技股份有限公司 | 一种基于单波长-双fp腔的表面形貌测量装置及测量方法 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7060967B2 (en) | Optical wavelength interrogator | |
| US5268741A (en) | Method and apparatus for calibrating a polarization independent optical coherence domain reflectometer | |
| CN107024236B (zh) | F-p/fbg光纤传感器解调系统 | |
| CN105865753B (zh) | 一种光纤干涉仪臂长差的测量装置及测量方法 | |
| CN104215605A (zh) | 一种快速的光纤光栅解调系统的动态定标方法 | |
| CN111693255B (zh) | 一种激光光源频率漂移的测量装置及方法 | |
| CN109099943A (zh) | 自校准自补偿型白光路径匹配差分干涉相位解调系统及其方法 | |
| CN107014412A (zh) | 一种双干涉仪匹配解调的光纤传感测量方法及装置 | |
| Wang et al. | Interrogation of extrinsic Fabry–Pérot sensors using path-matched differential interferometry and phase generated carrier technique | |
| CN110617875A (zh) | 一种波长移相式光纤声传感阵列解调系统和方法 | |
| CN110470378B (zh) | 一种正交相位保持的三波长解调式光纤声传感系统和方法 | |
| Wang et al. | Microwave photonic interrogation of a high-speed and high-resolution temperature sensor based on cascaded fiber-optic sagnac loops | |
| CN108240827A (zh) | 一种基于拉锥保偏光纤光栅光电振荡器的多参量测量方法及装置 | |
| CN108955939B (zh) | 一种光纤光栅温度传感解调系统 | |
| CN102135437B (zh) | 用非平衡Mach-Zehnder干涉仪对多信号问讯的方法及装置 | |
| Esquivel-Hernández et al. | Resolution improvement in a multi-point fiber refractometer based on coherent-OFDR | |
| CN210571001U (zh) | 一种共路双波长正交相位解调系统 | |
| CN108204827A (zh) | 一种相移光纤光栅解调系统 | |
| AU2020103491A4 (en) | A twin array Michelson fiber optic white light interferometry strain gauge | |
| CN115031824A (zh) | 低噪声白光pmdi信号检测与复用系统和方法 | |
| AU2020103490A4 (en) | A multiplexing optical fiber interferometer and its nesting construction method | |
| CN110440899B (zh) | 一种共路双波长正交相位解调系统 | |
| CN109724633B (zh) | 一种低反射率外腔光纤f-p干涉型传感器的解调系统 | |
| CN112816180A (zh) | 光纤色散测量方法及测量装置 | |
| CN105157875A (zh) | 一种基于光纤空气环腔的迈克尔逊干涉仪的温度传感器 |
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 | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170804 |
|
| WD01 | Invention patent application deemed withdrawn after publication |