CN206609543U - The relaying amplification module of distributed optical fiber temperature sensor based on Raman scattering - Google Patents
The relaying amplification module of distributed optical fiber temperature sensor based on Raman scattering Download PDFInfo
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- CN206609543U CN206609543U CN201621105734.7U CN201621105734U CN206609543U CN 206609543 U CN206609543 U CN 206609543U CN 201621105734 U CN201621105734 U CN 201621105734U CN 206609543 U CN206609543 U CN 206609543U
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- photoisolator
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- multimode fibre
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Abstract
The utility model proposes a kind of relaying amplification module of the distributed optical fiber temperature sensor based on Raman scattering, including photoisolator, EDFA Erbium-Doped Fiber Amplifier, wavelength division multiplexer, input optical fibre is connected to photoisolator, photoisolator is connected to EDFA Erbium-Doped Fiber Amplifier by multimode fibre, input light will be sent in wavelength division multiplexer by EDFA Erbium-Doped Fiber Amplifier after signal light amplification by multimode fibre, light output after amplification is into outside multimode fibre, the heliogram in multimode fibre is passed back to by wavelength division multiplexer in connected photoisolator simultaneously, then optical signal is returned by single-mode fiber.The utility model is amplified installed in distributed fiberoptic sensor end to the signal in optical fiber, realizes the bi-directional gain of optical signal, and the detection range of extended fiber sensor adds detection range, does not influence detection accuracy, reduces equipment cost.
Description
Technical field
The utility model belongs to field of sensing technologies, more particularly, to the distributed fiber optic temperature based on Raman scattering principle
The relaying amplification module of sensor.
Background technology
In Distributing Fiber Temperature Measuring System principle, LASER Light Source transmitting pulsed light (wavelength 1550nm) passes through coupling
Clutch is entered in sensor fibre, and temperature survey is carried out according to the relation of pulsed light transmission loss in a fiber and temperature,
Constant temperature part is to provide reference temperature point for optical fiber sensor temperature demarcation.The reflected light that light echo coupler is received enters filtering
Device, while receiving two beam light echos, stokes light and anti-Stokes light.Detector carries out opto-electronic conversion, by calculating two beams
Light echo energy proportion relation can just calculate temperature.
In existing system, the influence that sensor fibre detection range receives fibre loss can not be oversize, and Raman scattering is general
Detection range is less than 30 kilometers.Detection range can not reach that the main cause of requirement is conduction loss of the transmission light in inside of optical fibre
Heliogram is caused to be decayed, the photoelectric conversion signal of rear end is weaker to be not easy detection.
The content of the invention
In view of this, the utility model is directed in the distributed optical fiber temperature sensor based on Raman scattering principle
After amplification module, heliogram can be strengthened by bi-directional optical amplification, so as to greatly increase the detection range of DTS system.
To reach above-mentioned purpose, what the technical solution of the utility model was realized in：
A kind of relaying amplification module of the distributed optical fiber temperature sensor based on Raman scattering, including photoisolator,
EDFA Erbium-Doped Fiber Amplifier, wavelength division multiplexer, input optical fibre are connected to photoisolator, and photoisolator is connected by multimode fibre
To EDFA Erbium-Doped Fiber Amplifier, input light will be sent to wavelength-division by multimode fibre after signal light amplification and answered by EDFA Erbium-Doped Fiber Amplifier
With in device, the light output after amplification is into outside multimode fibre, while the heliogram in multimode fibre passes through wavelength division multiplexer
Pass back in connected photoisolator, then return optical signal by single-mode fiber.
Further, the input optical fibre uses multimode fibre.
Relative to prior art, the distributed optical fiber temperature sensor described in the utility model based on Raman scattering principle
Relaying amplification module have the advantage that：The utility model is arranged on distributed fiberoptic sensor end to the signal in optical fiber
It is amplified, realizes the bi-directional gain of optical signal, the detection range of extended fiber sensor adds detection range, do not influenceed
Detection accuracy, reduces equipment cost；
The integrated level of fibre optical sensor amplification relay unit is high, and convenient to install, machine volume reduces, intelligent level
Height, security is good, has both met the functional requirement of distributed optical fiber sensor extension, system cost can be substantially reduced again,
Required to carry out system design according to detection range；
The Raman diffused light fiber sensor amplification module of relaying amplification is added, range detection sensor can be expanded.Echo
Noise is small, easy for installation, and original measuring system is not influenceed, except being used as amplification relay unit extension measurement distance, the mould
Block is also applied to other distributed fiberoptic sensor expanding elements, and application field is wider.
Brief description of the drawings
Constitute a part of accompanying drawing of the present utility model to be used for providing further understanding to of the present utility model, this practicality is new
The schematic description and description of type is used to explain the utility model, does not constitute to improper restriction of the present utility model.
In accompanying drawing：
Fig. 1 is in a kind of distributed optical fiber temperature sensor based on Raman scattering described in the utility model embodiment
After the structural representation of amplification module；
Fig. 2 is the Raman scattering distributed fiberoptic sensor of the extension described in the utility model embodiment.
Embodiment
It should be noted that in the case where not conflicting, the feature in embodiment and embodiment in the utility model can
To be mutually combined.
In description of the present utility model, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", " on ", " under ",
The orientation or position relationship of the instruction such as "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom ", " interior ", " outer " are
Based on orientation shown in the drawings or position relationship, it is for only for ease of description the utility model and simplifies description, rather than indicate
Or imply that the device or element of meaning must have specific orientation, with specific azimuth configuration and operation, therefore be not understood that
For to limitation of the present utility model.In addition, term " first ", " second " etc. are only used for describing purpose, and it is not intended that indicating
Or imply relative importance or the implicit quantity for indicating indicated technical characteristic.Thus, " first ", " second " etc. are defined
Feature can express or implicitly include one or more this feature.In description of the present utility model, unless separately
It is described, " multiple " are meant that two or more.
, it is necessary to which explanation, unless otherwise clearly defined and limited, term " are pacified in description of the present utility model
Dress ", " connected ", " connection " should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or integratedly
Connection；Can be mechanical connection or electrical connection；Can be joined directly together, can also be indirectly connected to by intermediary,
It can be the connection of two element internals.For the ordinary skill in the art, on being understood by concrete condition
State concrete meaning of the term in the utility model.
Describe the utility model in detail below with reference to the accompanying drawings and in conjunction with the embodiments.
As shown in figure 1, a kind of relaying amplification module of the distributed optical fiber temperature sensor based on Raman scattering, including light
Electric isolator, EDFA Erbium-Doped Fiber Amplifier, wavelength division multiplexer, input optical fibre are connected to photoisolator, and photoisolator passes through many
Mode fiber is connected to EDFA Erbium-Doped Fiber Amplifier, EDFA Erbium-Doped Fiber Amplifier by after signal light amplification by multimode fibre by input light
It is sent in wavelength division multiplexer, the light output after amplification is into outside multimode fibre, while the heliogram in multimode fibre passes through
Wavelength division multiplexer is passed back in connected photoisolator, then returns optical signal by single-mode fiber.
The output optical fibre is multimode fibre.
The course of work of the present utility model is as follows：Using Raman diffused light fiber sensor DTS signal light input signal wavelength
For 1550nm, optical fiber uses multimode fibre.Input light enters photoisolator, is input in EDFA Erbium-Doped Fiber Amplifier, mixes bait light
Fiber amplifier is input to after signal light amplification in wavelength division multiplexer.Wavelength division multiplexer continues the optical signal after amplification to pass
In the defeated Raman distributed fibre optical sensor DTS systems to extension.The sensor fibre heliogram of extension is also by wavelength-division multiplex
Device is received, and is sent to photoisolator by optical fiber, heliogram then is transferred back into controller by single-mode fiber, by photoelectricity
By the fibre optical sensor signal extraction of extension after conversion, distributed fiberoptic sensor detection range is effectively increased.
The utility model also proposes a kind of distributed optical fiber temperature sensor based on Raman scattering, the biography of the sensor
The photosensitive fine above-mentioned relaying amplification module of connection, as shown in Figure 2.
Preferred embodiment of the present utility model is the foregoing is only, it is all at this not to limit the utility model
Within the spirit and principle of utility model, any modification, equivalent substitution and improvements made etc. should be included in the utility model
Protection domain within.
Claims (2)
1. a kind of relaying amplification module of the distributed optical fiber temperature sensor based on Raman scattering, it is characterised in that：Including light
Electric isolator, EDFA Erbium-Doped Fiber Amplifier, wavelength division multiplexer, input optical fibre are connected to photoisolator, and photoisolator passes through many
Mode fiber is connected to EDFA Erbium-Doped Fiber Amplifier, EDFA Erbium-Doped Fiber Amplifier by after signal light amplification by multimode fibre by input light
It is sent in wavelength division multiplexer, the light output after amplification is into outside multimode fibre, while the heliogram in multimode fibre passes through
Wavelength division multiplexer is passed back in connected photoisolator, then returns optical signal by single-mode fiber.
2. a kind of relaying amplification mould of distributed optical fiber temperature sensor based on Raman scattering according to claim 1
Block, it is characterised in that：The input optical fibre is multimode fibre.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201621105734.7U CN206609543U (en) | 2016-09-30 | 2016-09-30 | The relaying amplification module of distributed optical fiber temperature sensor based on Raman scattering |
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| CN201621105734.7U CN206609543U (en) | 2016-09-30 | 2016-09-30 | The relaying amplification module of distributed optical fiber temperature sensor based on Raman scattering |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111754755A (en) * | 2020-07-24 | 2020-10-09 | 中山水木光华电子信息科技有限公司 | Information transmission system and method based on distributed sensing |
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2016
- 2016-09-30 CN CN201621105734.7U patent/CN206609543U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111754755A (en) * | 2020-07-24 | 2020-10-09 | 中山水木光华电子信息科技有限公司 | Information transmission system and method based on distributed sensing |
| CN111754755B (en) * | 2020-07-24 | 2023-11-21 | 中山水木光华电子信息科技有限公司 | Information transmission system and method based on distributed sensing |
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