CN208672181U - A kind of temperature measuring equipment carrying out distributed sensing using fiber grating - Google Patents
A kind of temperature measuring equipment carrying out distributed sensing using fiber grating Download PDFInfo
- Publication number
- CN208672181U CN208672181U CN201821696173.1U CN201821696173U CN208672181U CN 208672181 U CN208672181 U CN 208672181U CN 201821696173 U CN201821696173 U CN 201821696173U CN 208672181 U CN208672181 U CN 208672181U
- Authority
- CN
- China
- Prior art keywords
- fiber
- fiber grating
- wavelength
- grating
- distributed sensing
- 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.)
- Expired - Fee Related
Links
Abstract
The utility model discloses a kind of temperature measuring equipments that distributed sensing is carried out using fiber grating, LD, dispersion compensating fiber, wavelength-division multiplex, Er-doped fiber, fiber coupler and the fiber grating being connected by optical fiber are successively arranged along optical transmission direction, dispersion compensating fiber input terminal is connected by optical fiber with 980nm pump light source, Er-doped fiber output end is connected by optical fiber with spectrometer, and 980nm pump light source, wavelength-division multiplex and Er-doped fiber constitute EDFA fiber amplifier.The utility model structure is simple and mode is novel, has the characteristics that operability height and practicability are good, fiber grating distributed sensing field of temperature measurement with good application prospect.
Description
Technical field
The utility model belongs to fiber grating distributed temperature measuring technical field, and in particular to a kind of to be carried out using fiber grating
The temperature measuring equipment of distributed sensing.
Background technique
In recent years, production is simple, low cost, stability are good, small in size, electromagnetism interference, make due to having for fiber grating
With flexibly and many advantages, such as same optical fiber system compatible is integrated is easy to, the application in the fields such as fiber optic communication and Fibre Optical Sensor is more next
More it is valued by people.Especially very big potentiality are shown in terms of for building with the Application in Sensing in bridge field.Due to
The intrinsic characteristic of fiber grating, fiber grating have been used to the variation of monitor stress and temperature, and in a large amount of municipal works,
Stress and temperature are all important physical factors in need of consideration.In a variety of occasions, the monitoring for requiring to carry out temperature is to prevent
Catastrophic variation occurs for building.Since fiber grating pair temperature has good temperature characterisitic, fiber grating is wide
General is applied in these occasions.Fiber-optic grating sensor is Wavelength-encoding sensor, therefore it has in temperature sensing arts
The advantage of many uniquenesses.Fiber grating is a kind of Wavelength selective reflective device, wavelength, that is, bragg wavelength meeting of its reflection signal
By temperature thereon is imposed on and strain is influenced and is changed, the variation of this reflection wavelength is known as wavelength shift.Using light
Two kinds of effect, that is, fiber gratings of temperature and strain of fine grating can sense other many physical quantitys as sensing element.
These of fiber grating are undivided using the tunable light wave selecting frequency characteristic excellent with it.It is axial by applying
Strain changes temperature, can be tuned in a certain range to its bragg wavelength.Therefore fiber-optic grating sensor at
For a big research hotspot of sensor field, it has electromagnetism interference, precision height, the good, reusability of stability etc. many excellent
Point.Especially its reusability is especially prominent, constitutes distributed sensor, it can be achieved that more using multiple fiber-optic grating sensors
Point detection, has preferable popularizing action prospect in the practical application of large-scale and labyrinth monitoring.
Summary of the invention
The technical issues of the utility model solves is simple there is provided a kind of structure and measurement accurately utilizes fiber grating
Carry out the temperature measuring equipment of distributed sensing.
The utility model adopts the following technical scheme that solve above-mentioned technical problem, a kind of to be distributed using fiber grating
The temperature measuring equipment of formula sensing, it is characterised in that: LD, the dispersion compensation light being connected by optical fiber are successively arranged along optical transmission direction
Fibre, wavelength-division multiplex, Er-doped fiber, fiber coupler and fiber grating, dispersion compensating fiber input terminal are pumped by optical fiber and 980nm
Pu light source is connected, and Er-doped fiber output end is connected by optical fiber with spectrometer, 980nm pump light source, wavelength-division multiplex and er-doped light
Fibre constitutes EDFA fiber amplifier.
Further preferably, the fiber coupler is the fiber coupler of 99:1.
The utility model can directly modulate LD, and the light issued from LD is guaranteed whole by dispersion compensating fiber
The total dispersion of fibre circuit is approximately zero, and the light into Er-doped fiber is constantly amplified through EDFA fiber amplifier, is finally entered
Constitute the fiber grating of multiple wavelength outputs.Different wave length spectrum corresponding to each fiber grating can be found according to modulation, benefit
With the thermally sensitive characteristic of bragg wavelength, drift that the bragg wavelength by measuring fiber grating varies with temperature come pair
Temperature is monitored, to realize distributed sensing thermometric.
The utility model structure is simple and mode is novel, has the characteristics that operability height and practicability are good, in optical fiber light
Grid distributed sensing field of temperature measurement is with good application prospect.
Detailed description of the invention
Fig. 1 is the optical path connection figure of the utility model.
In figure: 1-LD, 2- dispersion compensating fiber, 3-980nm pump light source, 4- wavelength-division multiplex, 5- Er-doped fiber, 6- optical fiber
Coupler, 7- spectrometer, 8- fiber grating.
Specific embodiment
The technical solution of the utility model is described in detail in conjunction with attached drawing.As shown in Figure 1, a kind of divided using fiber grating
The temperature measuring equipment of cloth sensing is successively arranged LD 1, the dispersion compensating fiber 2, wavelength-division being connected by optical fiber along optical transmission direction
Multiplexing 4, Er-doped fiber 5,99:1 fiber coupler 6 and fiber grating 8,4 input terminal of dispersion compensating fiber by optical fiber with
980nm pump light source 3 is connected, and 6 output end of Er-doped fiber is connected by optical fiber with spectrometer 7, and 980nm pump light source 3, wavelength-division are multiple
EDFA fiber amplifier is constituted with 4 and Er-doped fiber 5.
The utility model is a kind of temperature measuring equipment that distributed sensing is carried out using fiber grating, by multiple and different wavelength
For fiber grating as temperature sensor, fiber grating has the characteristics that narrow linewidth, antiradar reflectivity, and temperature suffered by it changes
When, the bragg wavelength of fiber grating is varied with temperature and is drifted about, and the mechanism of action is to pass through color from LD transmitting light beam
Dissipate compensated optical fiber, guarantee that the total dispersion of whole fibre circuit is approximately zero, into Er-doped fiber light in EDFA fiber amplifier
It is middle constantly to be amplified, finally enter the fiber grating for constituting multiple wavelength outputs.By directly being modulated to LD, can look for
The spectrum of the different wave length corresponding to each fiber grating, using the thermally sensitive characteristic of bragg wavelength, temperature suffered by it
When degree changes, the bragg wavelength of fiber grating is varied with temperature and is drifted about, by detecting the light each modulated
The variation of spectrum is monitored come the temperature exported to each fiber grating, to realize to extraneous distributed temperature sensing.
The utility model is the temperature measuring equipment that distributed sensing is carried out using fiber grating, is guaranteed based on dispersion compensating fiber
The total dispersion of whole fibre circuit is approximately zero, to realize the transmission of high speed, large capacity, long range, and is pumped with 980nm
Light source, wavelength-division multiplex and erbium-doped fiber constitute EDFA fiber amplifier.Select the fiber grating of multiple and different wavelength as temperature
Sensing point is spent, when the temperature varies, the bragg wavelength of fiber grating is varied with temperature and drifted about.In addition optical fiber light
Grid have that insertion loss is small, bandwidth production is simple, low in cost, be compatible with optical fiber entirely, small in size and can be embedded to intellectual material etc.
Advantage.
The basic principle of the utility model, main feature and advantage has been shown and described above, it is practical new not departing from this
Under the premise of type spirit and scope, there are also various changes and modifications, these changes and improvements both fall within requirement and protect the utility model
The scope of the utility model of shield.
Claims (2)
1. a kind of temperature measuring equipment for carrying out distributed sensing using fiber grating, it is characterised in that: successively set along optical transmission direction
There are LD, dispersion compensating fiber, wavelength-division multiplex, Er-doped fiber, fiber coupler and the fiber grating being connected by optical fiber, dispersion is mended
Optic fibre input end to be repaid to be connected by optical fiber with 980nm pump light source, Er-doped fiber output end is connected by optical fiber with spectrometer,
980nm pump light source, wavelength-division multiplex and Er-doped fiber constitute EDFA fiber amplifier.
2. the temperature measuring equipment according to claim 1 for carrying out distributed sensing using fiber grating, it is characterised in that: described
Fiber coupler is the fiber coupler of 99:1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821696173.1U CN208672181U (en) | 2018-10-19 | 2018-10-19 | A kind of temperature measuring equipment carrying out distributed sensing using fiber grating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821696173.1U CN208672181U (en) | 2018-10-19 | 2018-10-19 | A kind of temperature measuring equipment carrying out distributed sensing using fiber grating |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208672181U true CN208672181U (en) | 2019-03-29 |
Family
ID=65820646
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821696173.1U Expired - Fee Related CN208672181U (en) | 2018-10-19 | 2018-10-19 | A kind of temperature measuring equipment carrying out distributed sensing using fiber grating |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208672181U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111813161A (en) * | 2020-06-30 | 2020-10-23 | 武汉理工大学 | Bionic temperature control neural network system based on weak grating and working method thereof |
-
2018
- 2018-10-19 CN CN201821696173.1U patent/CN208672181U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111813161A (en) * | 2020-06-30 | 2020-10-23 | 武汉理工大学 | Bionic temperature control neural network system based on weak grating and working method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101852655B (en) | Distributed fiber Raman/Brillouin scattering sensor | |
| US20070058897A1 (en) | Fiber bragg grating sensor system | |
| CN102829806B (en) | Optical fiber sensing system based on phase-shifted optical fiber grating | |
| CN105091776A (en) | Fiber laser static-state strain beat frequency demodulation system based on single-sideband frequency sweep modulation | |
| CN108844614B (en) | Chaotic Brillouin optical correlation domain analysis system and method based on phase spectrum measurement | |
| CN101852626A (en) | Narrow-band distributed feedback laser wavelength scanning fiber bragg grating sensing device | |
| CN109186643B (en) | Accurate sensing system and sensing method based on reflection function resonant filter | |
| CN103259175A (en) | Tunable narrow-linewidth fiber laser based on interval tunable phase shift fiber gratings | |
| CN102762958B (en) | optical measuring system | |
| CN102721484B (en) | Distributed optical fiber sensing device based on brillouin scattering | |
| Lin et al. | Temperature sensor based on fiber ring laser with cascaded fiber optic Sagnac interferometers | |
| CN104390723A (en) | Multi-wavelength Brillouin fiber laser based optical fiber temperature sensor | |
| Su et al. | A novel fiber Bragg grating interrogating sensor system based on AWG demultiplexing | |
| US6879742B2 (en) | Using intensity and wavelength division multiplexing for fiber Bragg grating sensor system | |
| CN104617473A (en) | Brillouin three-loop narrow-linewidth fiber laser with low insertion loss | |
| CN112834070A (en) | Method for measuring temperature of optical fiber end face contact gas by using microwave photon filter | |
| CN209783610U (en) | Photoelectric oscillator double-parameter sensing device based on dispersion compensation grating pair | |
| CN208672181U (en) | A kind of temperature measuring equipment carrying out distributed sensing using fiber grating | |
| CN101419317A (en) | Double-edge filter based on optical fiber bragg grating | |
| GB2621276A (en) | Extending fiber optic sensing | |
| Fu et al. | A novel fiber Bragg grating sensor configuration for long-distance quasi-distributed measurement | |
| Zhang et al. | Temperature-insensitive displacement sensor based on high-birefringence photonic crystal fiber loop mirror | |
| Gao et al. | Study on fiber ring laser in sensing application with beat frequency demodulation | |
| CN209525030U (en) | A kind of optical pressure sensor | |
| KR20220043209A (en) | Method and system for interrogating a fiber optic Bragg grating type optical fiber sensor using a tunable optical bandpass filter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190329 Termination date: 20191019 |