CN108827374A - A kind of tandem hydrogen and oxygen concentration and temperature and humidity measuring system simultaneously - Google Patents
A kind of tandem hydrogen and oxygen concentration and temperature and humidity measuring system simultaneously Download PDFInfo
- Publication number
- CN108827374A CN108827374A CN201810340018.4A CN201810340018A CN108827374A CN 108827374 A CN108827374 A CN 108827374A CN 201810340018 A CN201810340018 A CN 201810340018A CN 108827374 A CN108827374 A CN 108827374A
- Authority
- CN
- China
- Prior art keywords
- lpfg
- humidity
- hydrogen
- temperature
- pcf
- 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
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
Abstract
The invention discloses a kind of tandem hydrogen and oxygen concentration and temperature and humidity while measuring systems, which includes wideband light source, three-dB coupler, the first LPFG, the 2nd LPFG, spectroanalysis instrument, computer and PCF.This system mainly solves fiber gas sensor, the unicity and different parameters when measuring other physical parameter intersect sensitivity and monitoring intelligence and automation the problem of.During the experiment, the variation of extraneous parameter is received by sensitive optical fibre, the change of parameter in sensitive optical fibre ambient enviroment can be calculated indirectly from the variation of spectrometer polishing wax, to realize the purpose of parameter measurement.The sensing probe of two kinds of gasmetries of hydrogen and oxygen and the sensing probe of temperature and humidity measurement have been separately designed in experiment, realize the automation real-time intelligent measurement of hydrogen, oxygen, temperature and humidity many reference amounts.
Description
Technical field
The present invention relates to a kind of systems for realizing more gas many reference amounts while measurement, belong to photoelectron, laser and automation
Fields of measurement.
Background technique
It is the mankind using clean energy resource and renewable energy with the consumption of the air pollution and fossil fuel that get worse
The task of top priority.Hydrogen is a kind of ideal future source of energy source, the blueness due to its recyclable and free of contamination characteristic, by people
It looks at.But since hydrogen divides very little, easily leaked in production, storage, transport and use process, and hydrogen colorless and odorless,
Explosion limit range is wide (4%-75%), meets open fire and explodes, causes a significant threat to the safety of life and property of people.
In the use process of hydrogen, it is necessary to detect and leak it being monitored to hydrogen content in environment, avoid hydrogen quick-fried
The generation of fried accident.The important indicator whether content of oxygen explodes as hydrogen, therefore, the measurement of content is same
Sample has critically important meaning.However the existing commercially available hydrogen sensor based on electrochemical principle, due to potential electric spark,
Still there is the danger of explosion.Therefore, research safety, reliable, sensitivity, selectivity are well and fireballing gas sensing is replied in response
Device has very great meaning.
Patent CN201310095458 discloses the Hybrid optical fiber of a kind of temperature and humidity and gas concentration while measurement
Grating sensing system measures the physical quantitys such as temperature, humidity, gas concentration, and is analyzed and processed to the signal of measurement,
Constitute the Hybrid fiber grating sensing system that temperature and humidity and gas concentration measure simultaneously.It mainly uses Hybrid fiber grating
As sensing element, temperature, humidity and gas concentration are sensed, not only there is high temperature resistant, corrosion-resistant and grating type optical fiber
The features such as sensor accuracy class is high, miniaturization, anti-interference, easy multiplexing, the advantages that being simply easily achieved there are also demodulation structure,
Pollution protection, Environmental Health monitoring etc. have wide practical use.
The optical fiber sensing technology risen along with optical fiber technology and Fibre Optical Communication Technology development mentions in order to solve the above problem
New thinking is supplied.Carrier of the fiber gas sensor using light as measured signal, does not have an impact measurement object, its own
Independence is good, and adapts to various use environments.Although the type and mode of current fiber gas sensor are various, wherein having
Long-period gratings (LPFG), bragg grating (FBG), D-type optical fiber, optical fiber photonic crystal fiber (PCF), be corroded
Deng, the material of sensitive membrane also there are many kinds of, for example, ZnO, SnO2、TiO2、MoO3、WO3Deng, but one sensor one of the present invention
Sense line realizes that more gases such as hydrogen and oxygen and place environment temperature and humidity many reference amounts automate real-time measurement simultaneously.
Hydrogen transportation environment many reference amounts are comprehensively held to realize.Wherein also there are many kinds of for example, ethyl alcohol, first for temperature sensitive liquid
Alcohol, carbon tetrachloride etc..It includes PVA, polymethyl methacrylate (PMMA), polyimides that humidity sensing film, which also has many selections,
Deng.This system exactly combines LPFG, sensitive material film, PCF, temperature sensitive liquid and optical fiber and computer, real
The real-time measurement apparatus of the existing more gases of many reference amounts.The present invention not only can be according to the needs of specific environment by changing gas sensitization
Film can also need to change the filling liquid of photonic crystal fiber to the measurement of variety classes gas to realization according to actual measurement
The conversion of body realization measurement parameters.
Summary of the invention
It is a primary object of the present invention to realize whether to let out the flammable explosive gas such as hydrogen during transportation
The detection of dew, and comprehensive real-time intelligent telemeasurement is carried out to many reference amounts such as oxygen concentration, the temperature and humidity of leakage point.
Facilitate assurance of the skilled worker to gas leakage point environment, to take different reasonable programs for different hydrogen leak case
Foundation is provided.And then greatly improve the time and money cost of gas detection and maintenance.And this sensor is with all the way
Sense line completes measurement while to many reference amounts, greatly simplifies sense line and detection complexity.
To achieve the goals above, this invention takes following technical solutions：A kind of tandem hydrogen and oxygen concentration and temperature
Humidity while measuring system are realized by the system and are surveyed to hydrogen, oxygen, the remote real-time intelligent of temperature and humidity many reference amounts
Amount, which includes wideband light source (BBS), three-dB coupler, the first LPFG, the 2nd LPFG, spectroanalysis instrument (OSA), computer
And PCF.
The spectrum of wideband light source needs to cover the spectral region of the first LPFG, the 2nd LPFG and PCF.
Wideband light source (BBS) is connected with the first LPFG by three-dB coupler, and PCF is connected with three-dB coupler；
First LPFG and the 2nd LPFG is connected in series.2nd LPFG and spectroanalysis instrument (5) connection, spectroanalysis instrument and meter
The connection of calculation machine.
The surface of first LPFG is coated with detection of the hydrogen sensitive film to do density of hydrogen.
The surface of 2nd LPFG is coated with detection of the oxygen sensitive film to do oxygen concentration.
Spectroanalysis instrument is used to detect and analyze spectrum.
Spectral information of the computer to store spectra re-recorded analyzer detection and analysis.Because of coating outside two LPFG
Sensitive thin-film material and sensing mechanism it is different, so wave corresponding to the sensitive waveform detected as spectroanalysis instrument OSA
It is long different, so as to make the detection of two kinds of gas concentrations simultaneously.
Temperature sensing material is filled respectively in the fibre core of PCF and end face and coating humidity-sensitive material does double parameters biography of temperature and humidity
Sensed quantity.
PCF and the first LPFG, the 2nd LPFG, spectroanalysis instrument (OSA), computer are connected in series.
The present invention can obtain following beneficial effect：
The present invention organically combines LPFG, PCF, sensitive membrane, temperature sensitive liquid and optical fiber and computer, and it is low dense to complete hydrogen
The real-time intelligent telemeasurement of the temperature and humidity and oxygen concentration of degree detection and density of hydrogen sensing point.To hydrogen gas leakage
The oxygen content and ambient enviroment of point are clear and comprehensively hold, so that the concrete condition for hydrogen gas leakage point is taken accordingly
Measure.And measurement while tandem sense line is completed to many reference amounts all the way of this sensor, greatly simplifies
Sense line, and detection complexity.And then greatly improve the time and money cost of gas detection and maintenance.It simultaneously can
To replace sensitive thin film according to the measurement demand of actual environment, more gas concentration measurement combinations are realized.This system is intended to provide one
The many reference amounts detection system of kind tandem hydrogen, oxygen concentration and temperature and humidity not only can satisfy multi-functional, intelligentized want
It asks, and matches achievable telemeasurement and control with fiber optic remote technology.
Detailed description of the invention
Fig. 1 is principal layout's figure of hydrogen and oxygen concentration and temperature and humidity while measuring system.
Fig. 2 is the device connection schematic diagram that hydrogen and oxygen concentration and temperature and humidity measure simultaneously.
In figure：1, wideband light source, 2, three-dB coupler, the 3, the first LPFG, the 4, the 2nd LPFG, 5, spectroanalysis instrument, 6, calculating
Machine, 7, PCF.
Specific embodiment
Below with reference to Fig. 1, the invention will be further described：
This many reference amounts real-time remote automatic monitoring system has two parts composition.First is that sensitive optical fibre induction external environment
Variation, another part is that computer reads and judges the specific value of parameter detected.
As shown in Figure 1, this system selects wideband light source 1 to meet the spectrum demand to parameter measurement.With three-dB coupler 2
The spectrum same transmission fiber that the humidity spectrum of PCF7 detection and the first LPFG3 and the 2nd LPFG4 are detected, realizes
The cascade process of many reference amounts measurement.Humidity sensitive film is coated by filling temperature sensing material and section in PCF7 and does temperature and wet
The measurement of degree.The detection process of sensitive wave length emits from BBS1 for light and passes to filling temperature sensing material by three-dB coupler 2
PCF7 is reflected back three-dB coupler 2 through the first LPFG3, the 2nd LPFG4 finally by spectroanalysis instrument using humidity sensitive film
5, computer 6 is respectively completed analysis and feedback to sensing spectrum.First LPFG3 and the 2nd LPFG4 is gas sensitization probe, because
This completes the measurement to gas concentration in the sensitive thin film of the first LPFG3 and the 2nd surface LPFG4 plating hydrogen and oxygen respectively.
Do not overlapped to realize that many reference amounts measure spectrum is discrete, not only need to consider two long-period gratings cycle match and
The type and thickness of sensitive material coated by grating surface and need to select two long-period gratings suitably connect apart from the problems such as.
This is the key that this system realizes intuitive simple many reference amounts measurement.Finally by spectroanalysis instrument 5, computer 6
It is respectively completed the analysis and feedback to sensing spectrum all in optical fiber.To realize remote real-time intelligent many reference amounts measurement.
This multi-parameter measurement system also can be made miniaturization many reference amounts measuring instrumentss, for real-time measurement on the spot.
Claims (3)
1. a kind of tandem hydrogen and oxygen concentration and temperature and humidity while measuring system, it is characterised in that：The system includes broadband light
Source (1), three-dB coupler (2), the first LPFG (3), the 2nd LPFG (4), spectroanalysis instrument (5), computer (6) and PCF (7)；
The spectrum of wideband light source (1) needs to cover the spectral region of the first LPFG (3), the 2nd LPFG (4) and PCF (7)；
Wideband light source (1) and the first LPFG (3) are connected by three-dB coupler (2), PCF (7) and three-dB coupler (2) connection；
First LPFG (3) and the 2nd LPFG (4) is connected in series；2nd LPFG (4) and spectroanalysis instrument (5) connection, spectrum analysis
Instrument (5) and computer (6) connection；
The surface of first LPFG (3) is coated with detection of the hydrogen sensitive film to do density of hydrogen；
The surface of 2nd LPFG (4) is coated with detection of the oxygen sensitive film to do oxygen concentration.
2. measuring system, feature exist simultaneously for a kind of tandem hydrogen and oxygen concentration according to claim 1 and temperature and humidity
In：Temperature sensing material and coating humidity-sensitive material are filled respectively in the fibre core of PCF (7) and end face, and the double parameters for doing temperature and humidity pass
Sensed quantity.
3. measuring system, feature exist simultaneously for a kind of tandem hydrogen and oxygen concentration according to claim 1 and temperature and humidity
In：
This system selects wideband light source (1) to meet the spectrum demand to parameter measurement；PCF (7) are visited with three-dB coupler (2)
The spectrum same transmission fiber that the humidity spectrum of survey and the first LPFG (3) and the 2nd LPFG (4) are detected realizes more ginsengs
The cascade process of measurement；Humidity sensitive film, which is coated, by the filling temperature sensing material in PCF (7) and section does temperature and humidity
Measurement；The detection process of sensitive wave length emits from BBS (1) for light and passes to filling temperature sensing material by three-dB coupler (2)
PCF (7) using humidity sensitive film be reflected back three-dB coupler (2) through the first LPFG (3), the 2nd LPFG (4) finally by
Spectroanalysis instrument (5), computer (6) are respectively completed analysis and feedback to sensing spectrum；First LPFG (3) and the 2nd LPFG
(4) it pops one's head in for gas sensitization, therefore thin in the sensitivity of the first LPFG (3) and the 2nd (4) surface LPFG plating hydrogen and oxygen respectively
Film completes the measurement to gas concentration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810340018.4A CN108827374A (en) | 2018-04-16 | 2018-04-16 | A kind of tandem hydrogen and oxygen concentration and temperature and humidity measuring system simultaneously |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810340018.4A CN108827374A (en) | 2018-04-16 | 2018-04-16 | A kind of tandem hydrogen and oxygen concentration and temperature and humidity measuring system simultaneously |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108827374A true CN108827374A (en) | 2018-11-16 |
Family
ID=64154651
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810340018.4A Pending CN108827374A (en) | 2018-04-16 | 2018-04-16 | A kind of tandem hydrogen and oxygen concentration and temperature and humidity measuring system simultaneously |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108827374A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109341735A (en) * | 2018-12-10 | 2019-02-15 | 山东省科学院激光研究所 | A kind of monitoring device and method |
| CN112525252A (en) * | 2020-10-27 | 2021-03-19 | 南京大学 | Fuel cell monitoring system and method |
| CN112983551A (en) * | 2021-04-02 | 2021-06-18 | 唐山市智明电子科技有限公司 | Monitoring system |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101650509A (en) * | 2009-09-15 | 2010-02-17 | 南京航空航天大学 | Bragg grating high-speed demodulating system based on cascade-connection long period fiber grating |
| US20100067555A1 (en) * | 2006-07-07 | 2010-03-18 | The University Of Sydney | Tunable optical supercontinuum enhancement |
| CN101936897A (en) * | 2010-06-29 | 2011-01-05 | 中国计量学院 | Humidity sensor and device based on tapered and injection type photonic crystal fiber |
| CN102162753A (en) * | 2010-12-09 | 2011-08-24 | 无锡成电光纤传感科技有限公司 | Sensor structure for simultaneously measuring temperature and strain of long period fiber gratings (LPFGs) |
| CN202149761U (en) * | 2010-12-29 | 2012-02-22 | 中国计量学院 | One-dimensional inclination angle sensor and apparatus based on PCF-LPG |
| US8160412B2 (en) * | 2009-12-08 | 2012-04-17 | The Hong Kong Polytechnic University | Microhole-structured long period fiber grating |
| CN102564334A (en) * | 2011-07-13 | 2012-07-11 | 浙江工业大学化工设备有限公司 | Long period fiber grating strain gauge for micro strain detection of high-temperature pipes |
| CN103196475A (en) * | 2013-03-23 | 2013-07-10 | 中南林业科技大学 | Hybrid fiber bragg grating sensing system for simultaneously measuring temperature, humidity and gas concentration |
| CN103196488A (en) * | 2013-03-12 | 2013-07-10 | 东北大学 | Photonic crystal fiber grating sensing method for detecting magnetic field and temperature simultaneously |
| CN105424651A (en) * | 2015-12-21 | 2016-03-23 | 安徽中科智泰光电测控科技有限公司 | Locatable methane leakage monitoring system |
| CN105572054A (en) * | 2016-03-03 | 2016-05-11 | 中国计量学院 | Optical fiber hydrogen sensor with temperature compensation function |
| CN106769897A (en) * | 2016-12-19 | 2017-05-31 | 重庆大学 | PCF LPG CH_4 detections devices and sensor production method |
-
2018
- 2018-04-16 CN CN201810340018.4A patent/CN108827374A/en active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100067555A1 (en) * | 2006-07-07 | 2010-03-18 | The University Of Sydney | Tunable optical supercontinuum enhancement |
| CN101650509A (en) * | 2009-09-15 | 2010-02-17 | 南京航空航天大学 | Bragg grating high-speed demodulating system based on cascade-connection long period fiber grating |
| US8160412B2 (en) * | 2009-12-08 | 2012-04-17 | The Hong Kong Polytechnic University | Microhole-structured long period fiber grating |
| CN101936897A (en) * | 2010-06-29 | 2011-01-05 | 中国计量学院 | Humidity sensor and device based on tapered and injection type photonic crystal fiber |
| CN102162753A (en) * | 2010-12-09 | 2011-08-24 | 无锡成电光纤传感科技有限公司 | Sensor structure for simultaneously measuring temperature and strain of long period fiber gratings (LPFGs) |
| CN202149761U (en) * | 2010-12-29 | 2012-02-22 | 中国计量学院 | One-dimensional inclination angle sensor and apparatus based on PCF-LPG |
| CN102564334A (en) * | 2011-07-13 | 2012-07-11 | 浙江工业大学化工设备有限公司 | Long period fiber grating strain gauge for micro strain detection of high-temperature pipes |
| CN103196488A (en) * | 2013-03-12 | 2013-07-10 | 东北大学 | Photonic crystal fiber grating sensing method for detecting magnetic field and temperature simultaneously |
| CN103196475A (en) * | 2013-03-23 | 2013-07-10 | 中南林业科技大学 | Hybrid fiber bragg grating sensing system for simultaneously measuring temperature, humidity and gas concentration |
| CN105424651A (en) * | 2015-12-21 | 2016-03-23 | 安徽中科智泰光电测控科技有限公司 | Locatable methane leakage monitoring system |
| CN105572054A (en) * | 2016-03-03 | 2016-05-11 | 中国计量学院 | Optical fiber hydrogen sensor with temperature compensation function |
| CN106769897A (en) * | 2016-12-19 | 2017-05-31 | 重庆大学 | PCF LPG CH_4 detections devices and sensor production method |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109341735A (en) * | 2018-12-10 | 2019-02-15 | 山东省科学院激光研究所 | A kind of monitoring device and method |
| CN109341735B (en) * | 2018-12-10 | 2021-08-20 | 山东省科学院激光研究所 | Monitoring device and method |
| CN112525252A (en) * | 2020-10-27 | 2021-03-19 | 南京大学 | Fuel cell monitoring system and method |
| CN112983551A (en) * | 2021-04-02 | 2021-06-18 | 唐山市智明电子科技有限公司 | Monitoring system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Lao et al. | In situ plasmonic optical fiber detection of the state of charge of supercapacitors for renewable energy storage | |
| US20210025945A1 (en) | Fiber optic sensing apparatus, system, and method for state of charge measurement in energy storage devices | |
| Boon-Brett et al. | Identifying performance gaps in hydrogen safety sensor technology for automotive and stationary applications | |
| CN108827374A (en) | A kind of tandem hydrogen and oxygen concentration and temperature and humidity measuring system simultaneously | |
| CN201859117U (en) | Humidity sensor based on multimode interference SMS (single-mode multimode single-mode) optical fiber structure | |
| CN108489901B (en) | Optical fiber hydrogen detection system based on novel hydrogen sensitive film | |
| CN113783272B (en) | Safety control method based on super capacitor monitoring management system | |
| CN104897577B (en) | Optical fiber hydrogen detection means based on light heating | |
| CN204718708U (en) | A kind of sensor simultaneously measured with strain based on temperature that is spherical and thin-core fibers | |
| CN103175807A (en) | Reflection-type all-fiber hydrogen sensor and preparation and measurement method thereof | |
| CN103743675B (en) | For salimity measurement fibre-optical probe and use the measurement mechanism of this fibre-optical probe | |
| CN105424651A (en) | Locatable methane leakage monitoring system | |
| CN201984116U (en) | Comprehensive evaluating device of sulfur hexafluoride electrical equipment | |
| CN103048285B (en) | Novel method for measuring absorption coefficient of atmospheric aerosol with light-heat method | |
| CN204154645U (en) | The different cored structure of a kind of single mode measures the Fibre Optical Sensor of Streptavidin concentration | |
| CN205691260U (en) | A kind of optical fiber grating temperature hydrogen gas sensor based on FP chamber | |
| CN106248602A (en) | Hydrogen sulfide gas sensing device based on optical fiber F P interferometer | |
| CN107949788A (en) | For determining the optical sensing system of hydrogen | |
| CN205484032U (en) | Methane leak detection system that can fix a position | |
| CN202511919U (en) | Fiber grating array temperature transmitter based on relative strength edge filtering method | |
| CN115377540A (en) | Fiber grating-based lithium battery thermal runaway internal multi-feature detection device and method | |
| CN103822903A (en) | No-core fiber based relative air humidity measuring instrument | |
| Peng et al. | RETRACTED ARTICLE: Intelligent electrical equipment fiber Bragg grating temperature measurement system | |
| CN203925466U (en) | Probe-type gas holdup meter | |
| CN203672774U (en) | Optical fiber probe for salinity measurement and measurement device using same |
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 | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20181116 |