CN113188600A - Long-distance distributed oil delivery pipe multi-parameter online measurement system - Google Patents
Long-distance distributed oil delivery pipe multi-parameter online measurement system Download PDFInfo
- Publication number
- CN113188600A CN113188600A CN202110482160.4A CN202110482160A CN113188600A CN 113188600 A CN113188600 A CN 113188600A CN 202110482160 A CN202110482160 A CN 202110482160A CN 113188600 A CN113188600 A CN 113188600A
- Authority
- CN
- China
- Prior art keywords
- optical fiber
- wavelength division
- sensor
- sensors
- division multiplexer
- 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
- 238000005259 measurement Methods 0.000 title claims abstract description 23
- 239000013307 optical fiber Substances 0.000 claims abstract description 69
- 230000005540 biological transmission Effects 0.000 claims abstract description 38
- 230000003287 optical effect Effects 0.000 claims abstract description 24
- 238000001514 detection method Methods 0.000 claims abstract description 17
- 239000000835 fiber Substances 0.000 claims description 9
- 239000004065 semiconductor Substances 0.000 abstract description 2
- 230000035945 sensitivity Effects 0.000 abstract description 2
- 239000003208 petroleum Substances 0.000 abstract 1
- 230000008054 signal transmission Effects 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 101000840267 Homo sapiens Immunoglobulin lambda-like polypeptide 1 Proteins 0.000 description 2
- 102100029616 Immunoglobulin lambda-like polypeptide 1 Human genes 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Images
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
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
-
- 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
- G01D5/268—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 using optical fibres
-
- 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
- G01D5/28—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 deflection of beams of light, e.g. for direct optical indication
- G01D5/30—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 deflection of beams of light, e.g. for direct optical indication the beams of light being detected by photocells
Abstract
The invention provides a remote distributed oil pipeline multi-parameter online measurement system, which comprises a measurement light source, a transmission optical fiber, an oil pipeline and a measurement sensor, wherein an optical fiber wavelength division multiplexer is arranged outside the measurement light source and is connected with a cascade multi-sensor through a first optical fiber bundle; the output end of the cascade multi-sensor is provided with a second optical fiber bundle, the other end of the second optical fiber bundle is provided with a wavelength division multiplexer, and the wavelength division multiplexer transmits the wavelength division multiplexer to the wavelength division detector through a second transmission optical fiber. The invention places various passive sensors in the oil pipe through the detection window on the petroleum pipeline, the various sensors are connected in parallel, the sensors and the outside adopt optical fibers for signal input and output, signal lights with different wavelengths are split and multiplexed by an optical fiber wavelength division multiplexer, the emission laser is a multi-wavelength laser, the photoelectric detector is a broadband semiconductor detector, the optical cable adopts low-loss optical fibers, and the detection signal-to-noise ratio and the sensitivity of the whole system are high.
Description
Technical Field
The invention belongs to the field of distributed sensing, and particularly relates to a set of distributed photoelectric sensing system for oil product detection in a long-distance oil pipeline.
Background
The transportation of oil through pipelines has the advantages of large transportation amount, low cost, stable oil transportation amount, no limitation of climate and other factors, and the like, is widely accepted and applied by countries all over the world, and is the most important means for oil transportation. With the development and the improvement of the transportation technology of the finished oil pipelines, the laying scale of the finished oil pipelines is continuously enlarged. At present, the laying distance of an oil pipeline is generally far, most pipelines are located in an unmanned area, and the maintenance and state monitoring inside and outside the pipelines are difficult. If the manual monitoring is adopted, time and labor are wasted, so that the sensors are installed on an oil pipeline for state measurement at present, but the types of the sensors are more, and signal transmission paths and methods are different, so that a sensing measurement system is very complex, and the compatibility is poor. How to realize simple and efficient multi-sensor signal transmission and measurement is a problem to be solved.
Disclosure of Invention
The method aims at the technical problem that simple and efficient multi-sensor signal transmission and measurement cannot be achieved in the prior art. The invention adopts laser signals to carry out distributed multi-parameter detection on oil products in a long-distance oil pipeline, carries out transmission of detection light and signal light through optical fibers, adopts cascade connection of a plurality of optical passive sensors, and can carry out multi-parameter on-line detection on the oil products in the oil pipeline at multiple points in real time to obtain parameters and states of the oil products, including oil product types, oil product temperature, pressure, oil product flow rate and the like. The invention adopts the wavelength division multiplexing technology, laser signals with multiple wavelengths are transmitted along a first transmission optical fiber cable to reach an oil pipeline and then are separated according to different wavelengths through an optical splitter, and the returned signal light with each wavelength is multiplexed back to an optical fiber through the wavelength division multiplexer and is returned to a control center through a second transmission optical fiber. Therefore, the complexity of the circuit is greatly reduced, all active modules and equipment are placed in the control center, only passive devices are arranged at the outdoor part, the device is particularly suitable for optical passive devices, the stability of the devices is excellent, the devices are not prone to failure, and therefore the failure risk can be greatly reduced.
The invention provides a remote distributed oil delivery pipe multi-parameter online measurement system which comprises a measurement light source, transmission optical fibers, an oil delivery pipe and a measurement sensor, wherein the transmission optical fibers comprise a first transmission optical fiber, a second transmission optical fiber, a first optical fiber bundle and a second optical fiber bundle; the output end of the measuring sensor is provided with a second optical fiber bundle, the other end of the second optical fiber bundle is provided with a wavelength division multiplexer, a second transmission optical fiber is arranged outside the wavelength division multiplexer, and the other end of the second transmission optical fiber is provided with a wavelength division detector.
In the invention, the measuring sensor is a cascade multi-sensor, and the cascade multi-sensor comprises a plurality of oil product temperature sensors, refractive index sensors, pressure sensors or concentration sensors.
In the invention, the cascade multi-sensor adopts a passive sensor coupled by optical fibers.
In the present invention, the first transmission fiber and the second transmission fiber are disposed in the same optical cable.
In the invention, the measuring light source is a multi-wavelength tunable laser light source.
In the invention, the oil pipeline is provided with a detection port.
In the invention, the detection port is respectively matched with an oil temperature sensor, a refractive index sensor, a pressure sensor or a concentration sensor.
In the invention, the measuring sensor is an electric signal sensor provided with a photoelectric conversion module.
The invention has the beneficial effects that:
the invention provides a remote distributed oil pipeline multi-parameter online measurement system, which is characterized in that various passive sensors are placed inside an oil pipe through a detection window on the oil pipeline, various optical sensors are connected in parallel, the sensors and the outside adopt optical fibers for signal input and output, signal lights with different wavelengths are subjected to light splitting and multiplexing through an optical fiber wavelength division multiplexer, a transmitting laser is a multi-wavelength laser, a photoelectric detector is a broadband semiconductor detector, an optical cable adopts low-loss optical fibers, the detection signal-to-noise ratio and the sensitivity of the whole system are high, and the detection data are accurate.
Drawings
Fig. 1 is a schematic structural diagram of a distributed oil pipeline multi-sensing system according to the present invention.
Fig. 2 is a schematic diagram of a fiber-coupled passive multi-sensor of the present invention.
In FIGS. 1-2: the system comprises a 1-multi-wavelength tunable laser light source, a 2-first transmission optical fiber, a 3-optical fiber wavelength division multiplexer, a 4-first optical fiber bundle, a 5-oil pipeline, a 6-second optical fiber bundle, a 7-wavelength division multiplexer, an 8-second transmission optical fiber, a 9-wavelength division detector, T1-T5, S1-S5, D1-D3 and C1 and C2, wherein the T8932 is a detection port on the oil pipeline, the S1-S5 are cascade multisensors, the D1-D3 are different cascade multisensors, and the C1 and C2 are optical fiber couplers.
Detailed Description
The following description of the embodiments of the present invention will be made in further detail with reference to the accompanying fig. 1-2 and examples, but the method of the present invention is not limited to the following examples.
In the present invention, for convenience of description, the description of the relative positional relationship of the components in the present invention is described based on the layout pattern of fig. 1, such as: the positional relationship of up, down, left, right, etc. is determined in accordance with the layout direction of fig. 1.
The measuring light source, the transmission optical fiber, the optical fiber wavelength division multiplexer 3, the wavelength division multiplexer 7, the wavelength division detector 9, the cascade multisensor and the optical fiber coupler used in the invention can be purchased or customized by market.
The scheme of the invention is that a multi-wavelength tunable laser light source 1 is used as a measuring light source to output different laser wavelengths in a time-sharing manner, the light source adopts optical fiber coupling output, and the output laser can be continuous light, pulse light or modulated light in intensity or optical signals of different modulation types in a time-sharing manner. The multi-wavelength tunable laser light source 1 is placed in an indoor control center machine room.
The multi-wavelength tunable laser light source is connected with the first transmission optical fiber 2, is laid outdoors in the optical cable and is used for transmitting the time-sharing multi-wavelength laser signal generated by the multi-wavelength tunable laser light source 1.
The time-sharing multi-wavelength signal reaches the optical fiber wavelength division multiplexer 3 after being transmitted through the first transmission optical fiber 2, different input wavelengths can be divided into multiple paths according to wavelength channels, for example, 5 paths are illustrated in fig. 1, and the actual application can reach more than one hundred paths.
The light is split by an optical fiber wavelength division multiplexer 3 and then transmitted by a first optical fiber bundle 4, 5 paths are shown in fig. 1, and 5 paths of laser signals with different wavelengths from lambda 1 to lambda 5 are respectively transmitted.
T1-T2 are 5 different detection ports on the oil pipeline, are respectively connected with 5 transmission optical fibers in the first optical fiber bundle 4, enter the oil pipeline 5 and are respectively connected with the cascade multi-sensors S1-S5. Each wavelength enters an oil product detection window, and the measuring light signals of different windows are distinguished through different wavelengths.
The sensors are all passive sensors, are particularly suitable for fiber coupling passive sensors, have different sensing capabilities, and can be used for sensing and measuring parameters such as oil temperature, refractive index, pressure, concentration and the like. The sensing data can reflect the parameters of the oil product such as the type, the temperature, the flow velocity and the like, if the sensor is a non-optical signal sensor, a photoelectric conversion circuit and a battery are required to be arranged on the sensor, other passive sensors can be controlled to work through optical signals, solar batteries and the like, the electric signals output by the sensor are converted into optical signals for transmission, and the input optical signals are converted into electric signals for controlling the sensor.
The cascade mode of each sensor is as shown in the example of fig. 2, D1-D3 are 3 different sensors, cascade in parallel, and there may be more sensors participating in cascade, and are not limited to 3. C1 and C2 are fiber couplers, C1 can divide the optical signal transmitted and input from the first transmission fiber 2 into multiple paths, each path is connected with a sensor, the optical signal output by the sensor passes through C2 and is combined into one path, and the optical signal is output by one path of fiber. The operating wavelength ranges of C1 and C2 are wide and can contain all the wavelength signals in the multi-wavelength tunable laser light source 1.
The optical signals output through the optical fibers S1 to S5 are respectively connected to the optical fibers λ 1 to λ 5 in the second bundle 6, and each channel has a different wavelength.
A plurality of different wavelengths can be combined by the wavelength division multiplexer 7 and then output from one optical fiber, and output light enters the second transmission optical fiber 8.
The second transmission optical fiber 8 and the first transmission optical fiber 2 are placed in the same optical cable, which is equivalent to a cable containing 2 optical fibers, and a larger number of optical fibers can be placed for signal transmission of other pipelines.
The return optical signal transmitted through the second transmission optical fiber 8 enters the wavelength division detector 9, the input different wavelengths can be divided into different channels, then detection is performed, and the detected signal is processed by a circuit to obtain each sensing signal parameter.
The invention can also adopt the electric signal sensor provided with the photoelectric conversion module. The sensor converts common electrical signals into optical signals for transmission, and converts the optical signals into electrical signals by using the conversion module and an external power supply to control the test work of the sensor. Therefore, optical cable transmission is realized for the control signal and the test result signal, the signal transmission fidelity is high, the optical cable integration level is high, the transmission line is not easy to damage, and the transmission efficiency is high.
As described above, the present invention can be preferably implemented, and the above-mentioned embodiments only describe the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements made to the technical solution of the present invention by those skilled in the art without departing from the design spirit of the present invention should fall within the protection scope determined by the present invention.
Claims (7)
1. The remote distributed oil delivery pipe multi-parameter online measurement system comprises a measurement light source, a transmission optical fiber and a measurement sensor, and is characterized in that the transmission optical fiber comprises a first transmission optical fiber, a second transmission optical fiber, a first optical fiber bundle and a second optical fiber bundle, the first transmission optical fiber is arranged outside the measurement light source, an optical fiber wavelength division multiplexer is arranged on the first transmission optical fiber, a first optical fiber bundle is arranged at the other end of the optical fiber wavelength division multiplexer, and the measurement sensor is arranged at the end of the first optical fiber bundle; the output end of the measuring sensor is provided with a second optical fiber bundle, the other end of the second optical fiber bundle is provided with a wavelength division multiplexer, a second transmission optical fiber is arranged outside the wavelength division multiplexer, and the other end of the second transmission optical fiber is provided with a wavelength division detector.
2. A remote distributed oil pipeline multiparameter on-line measuring system as defined in claim 1, wherein said measuring sensors are cascade multisensors including several of oil temperature sensors, refractive index sensors, pressure sensors or concentration sensors.
3. A remote distributed oil pipe multiparameter on-line measurement system as defined in claim 2, wherein said cascaded multisensor employs fiber-coupled passive sensors.
4. A remote distributed oil pipe multiparameter on-line measurement system as defined in claim 1, wherein the first and second transmission fibers are provided in the same optical cable.
5. A remote distributed oil pipeline multiparameter on-line measuring system as defined in claim 1, wherein said measuring light source is a multi-wavelength tunable laser light source.
6. A remote distributed oil pipeline multiparameter on-line measurement system as defined in claim 2, wherein said oil pipeline is provided with a detection port.
7. A multi-parameter online measurement system for a remote distributed oil delivery pipe according to claim 6, wherein the detection port is matched with an oil temperature sensor, a refractive index sensor, a pressure sensor or a concentration sensor, respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110482160.4A CN113188600A (en) | 2021-04-30 | 2021-04-30 | Long-distance distributed oil delivery pipe multi-parameter online measurement system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110482160.4A CN113188600A (en) | 2021-04-30 | 2021-04-30 | Long-distance distributed oil delivery pipe multi-parameter online measurement system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113188600A true CN113188600A (en) | 2021-07-30 |
Family
ID=76983290
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110482160.4A Pending CN113188600A (en) | 2021-04-30 | 2021-04-30 | Long-distance distributed oil delivery pipe multi-parameter online measurement system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113188600A (en) |
Citations (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5048909A (en) * | 1990-07-27 | 1991-09-17 | At&T Bell Laboratories | Adiabatic reflection apparatus |
| CN1527028A (en) * | 2003-06-18 | 2004-09-08 | 中国石油天然气集团公司 | Sensing and testing fiber grating system for oil and gas pipeline detection |
| US20070258319A1 (en) * | 2006-05-05 | 2007-11-08 | Erlend Ronnekleiv | Ocean bottom seismic sensing system |
| US20090238513A1 (en) * | 2006-05-09 | 2009-09-24 | Jianzhong Hao | WDM-Based Sensor System And Sensor Interrogation System |
| US20100183294A1 (en) * | 2009-01-16 | 2010-07-22 | Fernando Xavier Villarruel | Sparing for multi-wavelength optical transmitter |
| CN102661755A (en) * | 2012-04-27 | 2012-09-12 | 天津奇谱光电技术有限公司 | Fiber Bragg grating-based extensible distributed sensing system |
| US20140176951A1 (en) * | 2011-08-18 | 2014-06-26 | Kun Liu | Multi-band multiplexing intra-cavity gas sensing system and method |
| CN104180833A (en) * | 2014-07-18 | 2014-12-03 | 中国科学院上海光学精密机械研究所 | Optical time domain reflectometer simultaneously sensing temperature and stress |
| WO2015009825A1 (en) * | 2013-07-16 | 2015-01-22 | Adc Telecommunications, Inc. | Distributed wave division multiplexing systems |
| CN105135215A (en) * | 2015-06-26 | 2015-12-09 | 中国石油化工股份有限公司胜利油田分公司 | Leakage detection device for oil collecting pipeline with optical fiber method |
| CN106290248A (en) * | 2016-10-08 | 2017-01-04 | 山东微感光电子有限公司 | Oil-gas mining and accumulating dangerous leakage gas optical fiber sensing system device |
| CN106525091A (en) * | 2016-10-25 | 2017-03-22 | 华中科技大学 | Fiber grating array sensing demodulation system based on multi-wavelength pulse differential modulation |
| CN106768468A (en) * | 2016-11-14 | 2017-05-31 | 电子科技大学 | A kind of wavelength-division multiplex quasi-distributed optical fiber delay temperature sensor |
| CN108898778A (en) * | 2018-08-10 | 2018-11-27 | 中国石油天然气股份有限公司管道西安输油气分公司 | Oil tank with dome roof fire alarm system based on distributed optical fiber temperature sensor technology |
| CN109737996A (en) * | 2019-01-17 | 2019-05-10 | 中铁第四勘察设计院集团有限公司 | A kind of protective door that distributed sensing fiber is set side by side monitoring system and method |
| CN111707302A (en) * | 2015-03-06 | 2020-09-25 | 希里克萨有限公司 | Optical fiber distributed sensor system |
| CN111780790A (en) * | 2020-06-03 | 2020-10-16 | 华南师范大学 | Device and method for demodulating dense fiber bragg grating array |
-
2021
- 2021-04-30 CN CN202110482160.4A patent/CN113188600A/en active Pending
Patent Citations (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5048909A (en) * | 1990-07-27 | 1991-09-17 | At&T Bell Laboratories | Adiabatic reflection apparatus |
| CN1527028A (en) * | 2003-06-18 | 2004-09-08 | 中国石油天然气集团公司 | Sensing and testing fiber grating system for oil and gas pipeline detection |
| US20070258319A1 (en) * | 2006-05-05 | 2007-11-08 | Erlend Ronnekleiv | Ocean bottom seismic sensing system |
| US20090238513A1 (en) * | 2006-05-09 | 2009-09-24 | Jianzhong Hao | WDM-Based Sensor System And Sensor Interrogation System |
| US20100183294A1 (en) * | 2009-01-16 | 2010-07-22 | Fernando Xavier Villarruel | Sparing for multi-wavelength optical transmitter |
| US20140176951A1 (en) * | 2011-08-18 | 2014-06-26 | Kun Liu | Multi-band multiplexing intra-cavity gas sensing system and method |
| CN102661755A (en) * | 2012-04-27 | 2012-09-12 | 天津奇谱光电技术有限公司 | Fiber Bragg grating-based extensible distributed sensing system |
| WO2015009825A1 (en) * | 2013-07-16 | 2015-01-22 | Adc Telecommunications, Inc. | Distributed wave division multiplexing systems |
| CN104180833A (en) * | 2014-07-18 | 2014-12-03 | 中国科学院上海光学精密机械研究所 | Optical time domain reflectometer simultaneously sensing temperature and stress |
| CN111707302A (en) * | 2015-03-06 | 2020-09-25 | 希里克萨有限公司 | Optical fiber distributed sensor system |
| CN105135215A (en) * | 2015-06-26 | 2015-12-09 | 中国石油化工股份有限公司胜利油田分公司 | Leakage detection device for oil collecting pipeline with optical fiber method |
| CN106290248A (en) * | 2016-10-08 | 2017-01-04 | 山东微感光电子有限公司 | Oil-gas mining and accumulating dangerous leakage gas optical fiber sensing system device |
| CN106525091A (en) * | 2016-10-25 | 2017-03-22 | 华中科技大学 | Fiber grating array sensing demodulation system based on multi-wavelength pulse differential modulation |
| CN106768468A (en) * | 2016-11-14 | 2017-05-31 | 电子科技大学 | A kind of wavelength-division multiplex quasi-distributed optical fiber delay temperature sensor |
| CN108898778A (en) * | 2018-08-10 | 2018-11-27 | 中国石油天然气股份有限公司管道西安输油气分公司 | Oil tank with dome roof fire alarm system based on distributed optical fiber temperature sensor technology |
| CN109737996A (en) * | 2019-01-17 | 2019-05-10 | 中铁第四勘察设计院集团有限公司 | A kind of protective door that distributed sensing fiber is set side by side monitoring system and method |
| CN111780790A (en) * | 2020-06-03 | 2020-10-16 | 华南师范大学 | Device and method for demodulating dense fiber bragg grating array |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102201864B (en) | Loss testing apparatus for multi-channel optical device | |
| CN101924962B (en) | System and method thereof for detecting fiber faults | |
| CN105352914B (en) | A kind of gas concentration detection system and its method based on dual wavelength light fibre annular-type cavity | |
| CN101000267A (en) | Parallel distribution optical fibre raster temp. sensing method and its system | |
| CN201476800U (en) | High-speed multi-channel fiber grating sensor demodulating system based on AWG | |
| CN103647600B (en) | A kind of multi-channel intelligent optical testing device | |
| CN100507455C (en) | Intensity modulation type optical fiber sensor multiplexing method | |
| CN101881634A (en) | High-speed multi-channel fiber bragg grating (FBG) sensing demodulation system based on AWG (Arrayed Waveguide Grating) and method | |
| CN104535007A (en) | Distributed type optical fiber strain measurement system based on cavity-length-adjustable F-P white light interference demodulating device | |
| WO2020098577A1 (en) | Planar optical waveguide device, and temperature measurement system | |
| CN106989843A (en) | A kind of distributed multi-channel fiber Raman ultralow temperature measuring system | |
| CN106768468A (en) | A kind of wavelength-division multiplex quasi-distributed optical fiber delay temperature sensor | |
| CN104501731A (en) | Low-coherence multiplexing quasi-distribution optical fiber strain measurement system | |
| CN206038512U (en) | Optic fibre multicomponent gas sensing system | |
| CN109150311A (en) | A kind of multi-parameter sensing network based on fiber optic loop cavity attenuation and vibration technique | |
| CN105137201B (en) | A kind of optical fiber insulator insertion loss detector | |
| CN204405012U (en) | The multiplexed accurate profile fiber strain measurement system of a kind of Low coherence | |
| CN105262536A (en) | Photoelectric conversion module relative intensity noise test device and test method | |
| CN102680131A (en) | Distributed fiber grating temperature measurement sensing device | |
| CN204555926U (en) | A kind of distributive fiber optic strain measuring system based on the long adjustable F-P white light interference demodulating equipment in chamber | |
| CN203929276U (en) | A kind of optical signal detecting disposal system based on resonance technique | |
| CN203490168U (en) | Fiber-distributed multi-point online gas monitoring system and host thereof | |
| CN102661817A (en) | Distributed optical fiber temperature sensing system capable of automatically configuring parameters and configuration method thereof | |
| CN113188600A (en) | Long-distance distributed oil delivery pipe multi-parameter online measurement system | |
| KR102491712B1 (en) | Optical fiber connectivity tester |
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 | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210730 |
|
| RJ01 | Rejection of invention patent application after publication |