CN108426652A - Point type temperature sensing device based on fiber raman scattering and system - Google Patents
Point type temperature sensing device based on fiber raman scattering and system Download PDFInfo
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- CN108426652A CN108426652A CN201810657147.6A CN201810657147A CN108426652A CN 108426652 A CN108426652 A CN 108426652A CN 201810657147 A CN201810657147 A CN 201810657147A CN 108426652 A CN108426652 A CN 108426652A
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- raman scattering
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- type temperature
- temperature sensing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K11/00—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00
- G01K11/32—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using changes in transmittance, scattering or luminescence in optical fibres
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/08—Protective devices, e.g. casings
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K11/00—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00
- G01K11/32—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using changes in transmittance, scattering or luminescence in optical fibres
- G01K11/324—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using changes in transmittance, scattering or luminescence in optical fibres using Raman scattering
Abstract
The present invention provides a kind of point type temperature sensing device and system based on fiber raman scattering, is related to temperature sensor technology field, should point type temperature sensing device based on fiber raman scattering include：Fixed disk and the measurement optical fiber being arranged in the fixed disk, the measurement optical fiber include：Incident optical, disk fibre, the output optical fiber, incident optical, disk are fine, the output optical fiber is sequentially connected.The point type temperature sensing device based on fiber raman scattering can alleviate measurement of the existing temperature-measuring system of distributed fibers based on Raman scattering for specified point there are the not high technical problem of accuracy, improve the measurement accuracy for measurement point.In addition, fixed disk can play the role of protection optical fiber, while point type temperature sensing device replacement easy to disassemble that should be based on fiber raman scattering carries out Maintenance and Repair, saves maintenance cost.
Description
Technical field
The present invention relates to temperature sensor technology fields, are passed more particularly, to a kind of point type temperature based on fiber raman scattering
Induction device and system.
Background technology
Fiber Optic Pyrometer scheme common at present is that one is the line temperature-measuring system of distributed fibers based on Raman scattering.
The backward Raman scattering when light of system acquisition narrow-band light source transmitting is propagated in a fiber, and to the Stokes in scattering light
Mercerising and anti-Stokes light are compared, and wherein the intensity variation of anti-Stokes light is clearly demarcated with variation of ambient temperature ten
It is aobvious.By calculating the intensity rate of the light of two kinds of different wave lengths, the environment around the optical fiber scattered can be accurately obtained
Temperature.
However, inaccurate to the measurement of specified point based on the temperature-measuring system of distributed fibers of Raman scattering, it is vulnerable to and is
The influence for the factors such as noise, ambient vibration of uniting, cannot meet the measurement demand of user, cause user experience poor.
To sum up, there are accuracy for the measurement of specified point for the existing temperature-measuring system of distributed fibers based on Raman scattering
Not high problem.
Invention content
In view of this, the point type temperature sensing device that the purpose of the present invention is to provide a kind of based on fiber raman scattering and
System, with alleviate the existing temperature-measuring system of distributed fibers based on Raman scattering for specified point measurement there are accuracy not
High technical problem.
In a first aspect, an embodiment of the present invention provides a kind of point type temperature sensing device based on fiber raman scattering, packet
It includes：Fixed disk and the measurement optical fiber being arranged in the fixed disk, the measurement optical fiber include：Incident optical, disk fibre, emergent light
Fibre, the incident optical, disk are fine, the output optical fiber is sequentially connected.
With reference to first aspect, an embodiment of the present invention provides the first possible embodiments of first aspect, wherein institute
Stating fixed disk includes：Fixed pedestal and fixed ring, the fixed ring are mounted on the fixed pedestal.
The possible embodiment of with reference to first aspect the first, an embodiment of the present invention provides second of first aspect
Possible embodiment, wherein the fixed pedestal is provided with fixed part, and the fixed part is for fixing the fixed ring.
Second of possible embodiment with reference to first aspect, an embodiment of the present invention provides the third of first aspect
Possible embodiment, wherein the fixed pedestal includes first substrate and second substrate, the first substrate and described second
The space that the fixed ring is clamped is formed between substrate.
The possible embodiment of with reference to first aspect the first, an embodiment of the present invention provides the 4th kind of first aspect
Possible embodiment, wherein the fixed ring is provided with the first fixing groove and the second fixing groove, first fixing groove and institute
The second fixing groove is stated to be connected；For fixing the incident optical and the output optical fiber, described second fixes first fixing groove
Slot is fine for fixing the disk.
With reference to first aspect, an embodiment of the present invention provides the 5th kind of possible embodiments of first aspect, wherein institute
Stating fixed disk includes：First end cover and with the matched second end cover of first end cover, the first end cover and the second end cover
It is formed for accommodating the space for measuring optical fiber；The first end cover is internally provided with the first fixing groove and the second fixing groove,
First fixing groove is connected with second fixing groove, and first fixing groove is for fixing the incident optical and outgoing
Optical fiber, second fixing groove are fine for fixing the disk.
With reference to first aspect, an embodiment of the present invention provides the 6th kind of possible embodiments of first aspect, wherein institute
It includes multi-ring fiber coil to state disk fibre.
With reference to first aspect, an embodiment of the present invention provides the 7th kind of possible embodiments of first aspect, wherein institute
It includes single mode optical fiber or multimode fibre to state and measure optical fiber.
Second aspect, the embodiment of the present invention also provide a kind of point type temperature-sensing system based on fiber raman scattering, packet
It includes：Optical fiber sensing host and as described in any one of first aspect and its possible embodiment based on fiber Raman
The point type temperature sensing device of scattering, the optical fiber sensing host are passed with the point type temperature based on fiber raman scattering
Induction device is connected.
In conjunction with second aspect, an embodiment of the present invention provides the first possible embodiments of second aspect, wherein institute
It is one or more to state the point type temperature sensing device based on fiber raman scattering.
The embodiment of the present invention brings following advantageous effect：
An embodiment of the present invention provides a kind of point type temperature sensing device and system based on fiber raman scattering, wherein
The point type temperature sensing device based on fiber raman scattering includes：Fixed disk and the measurement light being arranged in the fixed disk
Fibre, the measurement optical fiber include：Incident optical, disk fibre, the output optical fiber, incident optical, disk are fine, the output optical fiber is sequentially connected.Cause
This, technical solution provided in an embodiment of the present invention, by fixed disk and the incident optical being arranged in fixed disk, disk is fine, goes out
Penetrate optical fiber, when use can mitigate the influence of measurement point ambient environment vibrations, noise, alleviate existing based on Raman scattering
Temperature-measuring system of distributed fibers is measured for specified point there are the not high technical problem of accuracy, is improved for measurement point
Measurement accuracy.In addition, fixed disk can play the role of protection optical fiber, while should the point type temperature based on fiber raman scattering
It spends sensing device replacement easy to disassemble and carries out Maintenance and Repair, save maintenance cost.
Other features and advantages of the present invention will illustrate in the following description, also, partly become from specification
It obtains it is clear that understand through the implementation of the invention.The purpose of the present invention and other advantages are in specification, claims
And specifically noted structure is realized and is obtained in attached drawing.
To enable the above objects, features and advantages of the present invention to be clearer and more comprehensible, preferred embodiment cited below particularly, and coordinate
Appended attached drawing, is described in detail below.
Description of the drawings
It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution in the prior art
Embodiment or attached drawing needed to be used in the description of the prior art are briefly described, it should be apparent that, in being described below
Attached drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not making the creative labor
It puts, other drawings may also be obtained based on these drawings.
Fig. 1 is a kind of signal of the point type temperature sensing device based on fiber raman scattering provided in an embodiment of the present invention
Figure；
Fig. 2 is the structural schematic diagram of fixed ring provided in an embodiment of the present invention；
Fig. 3 is the structural schematic diagram of first substrate provided in an embodiment of the present invention；
Fig. 4 is the structural schematic diagram of second substrate provided in an embodiment of the present invention；
Fig. 5 is the structural frames of an embodiment of the present invention provides a kind of point type temperature-sensing system based on fiber raman scattering
Figure；
Fig. 6 is that an embodiment of the present invention provides the first of the point type temperature-sensing system based on fiber raman scattering applications
Structural schematic diagram；
Fig. 7 is the another kind application an embodiment of the present invention provides the point type temperature-sensing system based on fiber raman scattering
Structural schematic diagram.
Specific implementation mode
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with attached drawing to the present invention
Technical solution be clearly and completely described, it is clear that described embodiments are some of the embodiments of the present invention, rather than
Whole embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not making creative work premise
Lower obtained every other embodiment, shall fall within the protection scope of the present invention.
Fiber Optic Pyrometer scheme common at present is that one is the line temperature-measuring system of distributed fibers based on Raman scattering.
The backward Raman scattering when light of system acquisition narrow-band light source transmitting is propagated in a fiber, and to the Stokes in scattering light
Mercerising and anti-Stokes light are compared, and wherein the intensity variation of anti-Stokes light is clearly demarcated with variation of ambient temperature ten
It is aobvious.By calculating the intensity rate of the light of two kinds of different wave lengths, the environment around the optical fiber scattered can be accurately obtained
Temperature.However, it is inaccurate to the measurement of specified point based on the temperature-measuring system of distributed fibers of Raman scattering, it is vulnerable to system noise
The influence of the factors such as sound, ambient vibration cannot meet the measurement demand of user, cause user experience poor, be based on this, this hair
A kind of the point type temperature sensing device and system based on fiber raman scattering that bright embodiment provides, can alleviate existing be based on
That there are accuracy is not high, user test Experience Degree is poor for the measurement of specified point for the temperature-measuring system of distributed fibers of Raman scattering
The technical issues of.
For ease of understanding the present embodiment, one kind disclosed in the embodiment of the present invention is dissipated based on fiber Raman first
The point type temperature sensing device penetrated describes in detail.
Embodiment one：
As shown in Figure 1, an embodiment of the present invention provides a kind of point type temperature sensing device based on fiber raman scattering, packet
It includes：Fixed disk 4 and the measurement optical fiber (also known as sensor fibre) being arranged in above-mentioned fixed disk, above-mentioned measurement optical fiber includes：Enter
Optical fiber 1, disk fibre 3, the output optical fiber 2 are penetrated, above-mentioned incident optical, disk are fine, the output optical fiber is sequentially connected.
In other words, incident optical 1, disk fibre 3, the output optical fiber 2 are same root optical fiber (measuring optical fiber), measure optical fiber
Fiber type can be single mode optical fiber or multimode fibre.
Specifically, single mode optical fiber is using G.652 single mode optical fiber, multimode fibre can according to different application scenarios demands come
Customization, typical multimode fibre is using G.651 multimode fibre.
Further, fixed disk 4 is made of polytetrafluoroethylene material, can quickly conduct heat in disk fibre 3.
Further, fixed disk 4 offers through-hole, and above-mentioned through-hole is for fixing the point type temperature based on fiber raman scattering
Spend sensing device；Specifically, above-mentioned through-hole is for the above-mentioned point type temperature sensing device based on fiber raman scattering to be fixed on
At pilot to be measured.
Further, above-mentioned through-hole can be round hole, square hole.
Specifically, disk fibre 3 is wound with multi-ring fiber coil, the coiling quantity of fiber optic coils in a manner of fiber optic coils coiling
Depending on practical application scene demand from 10 to hundreds of circles (circle), such as disk fibre 3 includes that 10-200 encloses fiber optic coils.
In actual use, incident light enters from incident optical 1 in disk fibre 3, along disk fibre 3 in the point based on fiber raman scattering
One or many cycles are carried out inside formula temperature sensing device to detour, and are emitted from the output optical fiber 2.
Here incident light refers to sensing incident light；When only needing to measure a measurement point, i.e., it should be based on fiber Raman
When the point type temperature sensing device of scattering is one, which can be the light that light source is sent out；It is multiple when needing to measure
When the measurement point of distribution, i.e., when the point type temperature sensing device based on fiber raman scattering is multiple, the sensing incident light
Can be the light of the output optical fiber outgoing of the point type temperature sensing device based on fiber raman scattering from previous, the light of the outgoing into
In the incident optical for entering the latter point type temperature sensing device based on fiber raman scattering.
In order to make it easy to understand, the point type temperature sensing device with first based on fiber raman scattering and second is based on light below
Point type temperature sensing device of the point type temperature sensing device two based on fiber raman scattering of fiber Raman scattering illustrates, the
The one point type temperature sensing device external light source based on fiber raman scattering, the second point type temperature based on fiber raman scattering pass
Induction device and the first point type temperature sensing device based on fiber raman scattering are connected, specifically, light source and first is based on light
The incident optical of the point type temperature sensing device of fiber Raman scattering is connected；The first point type temperature based on fiber raman scattering passes
The output optical fiber of induction device is connected with the incident optical of the second point type temperature sensing device based on fiber raman scattering.This
When, the first point type temperature sensing device based on fiber raman scattering refers to the previous point based on fiber raman scattering above-mentioned
Formula temperature sensing device, the second point type temperature sensing device based on fiber raman scattering be refer to above-mentioned latter being based on optical fiber
The point type temperature sensing device of Raman scattering.
Further, in the present embodiment, with reference to Fig. 2, Fig. 3 and Fig. 4, above-mentioned fixed disk includes：Fixed pedestal and fixation
Ring 42, above-mentioned fixed pedestal are connected with above-mentioned fixed ring；Above-mentioned fixed ring is mounted on above-mentioned fixed pedestal.
In order to facilitate component and Maintenance and Repair are replaced, further, above-mentioned fixed pedestal and above-mentioned fixed ring are with can
The mode of dismounting is connected.
Further, above-mentioned fixed pedestal is provided with fixed part, and fixation portions is for fixing above-mentioned fixed ring.It is above-mentioned solid
It includes mounting hole or mounting groove to determine portion.
When fixed part includes mounting hole 410, correspondingly, being also equipped in fixed ring and the mounting hole of fixed pedestal 410
Matched mounting hole 420.Specifically, fixed ring 42 can be fixedly mounted on by connector on fixed pedestal, company here
Fitting includes bolt, screw etc.；Connector passes through the mounting hole 420 being arranged in fixed ring 42 and is arranged on fixed pedestal
Mounting hole 410 fixed ring 42 is fixedly mounted on fixed pedestal.
It should be pointed out that when fixed part includes mounting groove, at this point, fixed ring can then fix peace in a manner of embedded
In fixation portions.Certainly, mounting groove is also provided with screw thread, and being connected through a screw thread keeps fixed ring more firm.
Further, fixed pedestal includes first substrate 411 and second substrate 412, above-mentioned first substrate and above-mentioned second
The space that above-mentioned fixed ring is clamped is formed between substrate.
By the way that two substrates are arranged, it on the one hand can enhance the fix tightly solidity of fixed ring, on the other hand can prevent from surveying
Amount optical fiber is exposed to the influences such as the external erosion being subject to or interference.
It should be pointed out that first substrate 411 or second substrate 412 can be used separately as fixed pedestal.
Further, fixed ring 42 is provided with the first fixing groove 421 and the second fixing groove 422, above-mentioned first fixing groove and
Above-mentioned second fixing groove is connected；For above-mentioned first fixing groove for fixing above-mentioned incident optical and the output optical fiber, above-mentioned second is solid
It is fine for fixing above-mentioned disk to determine slot.
Further, above-mentioned first fixing groove is linear type, and above-mentioned second fixing groove is annular.
Further, demarcation strip (being not shown in the drawing) can also be set inside above-mentioned first fixing groove, and above-mentioned demarcation strip is used
It is separated in by incident optical and the output optical fiber, while can be to avoid interfering with each other between incident optical and the output optical fiber.
Further, above-mentioned fixed ring is round or square structure.
Further, above-mentioned disk fibre includes multi-ring fiber coil so that long length measures temperature of the optical fiber to single-point
Continuous acquisition is carried out, the measurement accuracy for improving measurement point is conducive to.
Embodiment two：
An embodiment of the present invention provides the another kinds point type temperature sensing device based on fiber raman scattering, with embodiment one
Difference lies in this embodiment, above-mentioned fixed disk includes：First end cover and with the matched second end cover of first end cover,
Above-mentioned first end cover forms the space for accommodating above-mentioned measurement optical fiber with above-mentioned second end cover；Setting inside above-mentioned first end cover
There are the first fixing groove and the second fixing groove, above-mentioned first fixing groove to be connected with above-mentioned second fixing groove, above-mentioned first fixing groove
For fixing above-mentioned incident optical and the output optical fiber, above-mentioned second fixing groove is fine for fixing above-mentioned disk.
Embodiment three：
As shown in figure 5, an embodiment of the present invention provides a kind of point type temperature-sensing system based on fiber raman scattering, packet
It includes：Optical fiber sensing host 100 (also known as temperature sensing optical fiber detector or temperature sensing optical fiber host) and as previous embodiment carries
And the point type temperature sensing device 200 based on fiber raman scattering, above-mentioned optical fiber sensing host with it is above-mentioned be based on optical fiber
The point type temperature sensing device of Raman scattering is connected.
Specifically, optical fiber sensing host passes through light with the above-mentioned point type temperature sensing device based on fiber raman scattering
Fibre is connected.Here optical fiber is identical as the fiber type and model that measure optical fiber.
Further, the above-mentioned point type temperature sensing device based on fiber raman scattering is one or more.
Further, in one embodiment, above-mentioned optical fiber sensing host includes light source and detector.Above-mentioned light source
For sending out detection light.Here detection light is to enter the point type temperature based on fiber raman scattering as sensing incident light to pass
In the incident optical of induction device.
With reference to Fig. 6, when the point type temperature sensing device based on fiber raman scattering is one, for convenience, Fig. 6
In indicated with the present apparatus 1.Sensing incident light, through the present apparatus 1, (the point type temperature sensing based on fiber raman scattering fills from light source
The abbreviation set) incident optical enter in the disk fibre of the present apparatus 1, along the disk fibre of the present apparatus 1 repeatedly recycled inside the present apparatus around
Row, is emitted from the output optical fiber of the present apparatus 1.The rear orientation light generated in the present apparatus enters optical fiber temperature through incident optical outgoing
Degree sensing host, is received by detector.Detector received signal passes through filtering by the computer of optical fiber sensing host
Algorithm, average algorithm such as are filtered, are averaged at the calculating respectively, can obtain the temperature of the test point.Wherein, filtering algorithm is to make
Time-domain signal is converted into frequency-region signal with Fourier transform, then selects suitable frequency spectrum section to set to 0 other signals, then make
Frequency-region signal is converted into time-domain signal with inverse-Fourier transform.Average algorithm is to carry out the signal of certain point or so several points
Weighted average, boundary are extended using the value for replicating boundary, and average weighted value is substituted initial value.
When the point type temperature sensing device based on fiber raman scattering is multiple, sensing incident light enters previous from light source
In the incident optical of device, repeatedly cycle detours in the disk fibre of previous device, the output optical fiber outgoing through previous device, previous
Incident optical of the rear orientation light through previous device generated in device backs into detector；From the emergent light of previous device
The incident optical of emergent light (i.e. as the sensing incident light of next device) through next device of fibre outgoing enters next device
In disk fibre, the disk fibre along next device repeatedly recycles detour in the inside of next device, goes out from the output optical fiber of next device
It penetrates, the rear orientation light generated in next device the also incident optical outgoing through next device is finally returned that through previous device
Into in detector；The emergent light (the sensing incident light as latter arrangement) being emitted from the output optical fiber of next device enters
In the incident optical of latter arrangement.The rear orientation light generated in latter arrangement enters next from the output optical fiber of next device
Device reversely recycles detour in next device along the disk fibre of next device, and is emitted through the incident optical of next device, enters
The output optical fiber of previous device is finally returned that into detector.
With reference to Fig. 7, for the ease of understanding and describing conveniently, when the point type temperature sensing device based on fiber raman scattering
When being multiple, indicated with the present apparatus 1, the present apparatus 2, the present apparatus 3 ... in Fig. 7.Below using the present apparatus 1 as previous device, sheet
Device 2 illustrates the above process as latter arrangement as next device, the present apparatus 3：Incident light is sensed from fiber optic temperature
The light source of sensing host enters in the incident optical of the present apparatus 1, and repeatedly cycle detours in the disk fibre of the present apparatus 1, through the present apparatus 1
The output optical fiber outgoing, incident optical of the rear orientation light through the present apparatus 1 generated in the present apparatus 1 back into fiber optic temperature biography
In the detector for feeling host；Emergent light (i.e. as the sensing incident light of the present apparatus 2) warp being emitted from the output optical fiber of the present apparatus 1
The incident optical of the present apparatus 2 enters in the disk fibre of the present apparatus 2, along the present apparatus 2 disk fibre the inside of the present apparatus 2 repeatedly cycle around
Row, is emitted from the output optical fiber of the present apparatus 2, incident optical of the rear orientation light generated in the present apparatus 2 also through the present apparatus 2
Outgoing, finally returns that through the present apparatus 1 into the detector of optical fiber sensing host；Go out from the output optical fiber of the present apparatus 2
The emergent light (the sensing incident light as the present apparatus 3) penetrated enters in the incident optical of the present apparatus 3.After being generated in the present apparatus 3
Enter the present apparatus 2 from the output optical fiber of the present apparatus 2 to scattering light, reversely along the disk fibre of the present apparatus 2 in the present apparatus 2 cycle around
Row, and be emitted through the incident optical of the present apparatus 2, the output optical fiber into the present apparatus 1 is finally returned that into optical fiber sensing master
In the detector of machine.Detector received signal passes through filtering algorithm, average calculation by the computer of optical fiber sensing host
Method such as is filtered, is averaged at the calculating respectively, can obtain the temperature of each test point.Certain computer can also carry out signal
Noise reduction process.
Point type temperature-sensing system provided in an embodiment of the present invention based on fiber raman scattering, passes through optical fiber sensing
Host is filtered the signal of the collected point type temperature sensing device based on fiber raman scattering, flat equalization process, solution
It has determined to the problem of single point temperature measurement accuracy deficiency in the line distributed sensing system based on Raman scattering, while can subtract
Few maintenance cost, protection optical fiber.
In another embodiment, above-mentioned optical fiber sensing host includes light source generator, photoelectric conversion device, electricity
Signal processing apparatus, wherein light source generator, photoelectric conversion device are connected with electric signal process unit respectively, and light source
Generating means is connected with photoelectric conversion device.
Specifically, light source generator includes light source, light source controller, light wavelength division multiplexing, light source controller, light source,
Light wavelength division multiplexing, which is sequentially connected, to be connect.Light source controller is connected with the computer of electric signal process unit, light wavelength division multiplexing
It is connected with the measurement optical fiber of the point type temperature sensing device based on fiber raman scattering.
Further, light source uses pulse laser, pulse laser to need to generate the light that pulsewidth is relatively narrow and power is larger
Pulse, therefore, light source controller here use clock-pulse generator, for generating the arteries and veins with predetermined width and frequency
Punching；Light wavelength division multiplexing includes (being integrated with) film interference filter plate, can filter out Stokes and anti-Stokes both
The light of specific wavelength.The light filtered out enters the photoelectric conversion device being connected with light wavelength division multiplexing through light wavelength division multiplexing respectively
Photoelectric detector in.
Photoelectric conversion device includes photoelectric detector and the main amplifier that is connected with photoelectric detector, and photoelectric detector is used
In faint optical signal is converted into electric signal, main amplifier is for electric signal to be amplified, to obtain being suitble to data acquisition
Block the electric signal (can be voltage signal here) of processing.Specifically, photoelectric detector is generally using the snow with internal gain
Diode (APD) is collapsed, main amplifier generally comprises broadband height, high gain, the casacade multi-amplifier composition of low noise.
Electric signal process unit includes data collecting card and the computer that is connected with data collecting card, data collecting card tool
There are higher acquisition speed and acquisition digit, to effectively carry out data accumulation and average treatment.
The application method of the system is briefly described below：Computer controls clock-pulse generator and generates with default
Pulse, which is allowed to generate a series of high-power light pulses on the one hand for modulating pulse laser, while to high speed
Data collecting card provides lock-out pulse, into data acquisition state.Light pulse is entered by a port of wavelength division multiplexer
The measurement optical fiber of point type temperature sensing device based on fiber raman scattering, and rear orientation light is generated at each point in a fiber,
Back to wavelength division multiplexer.
Rear orientation light filters out stokes light and anti-stoke respectively by the thin-film interference filters of wavelength division multiplexer
This light, other two port output through wavelength division multiplexer, and have respectively entered and carry out light in photoelectric detector and main amplifier
Electricity conversion and amplification may amplify the signal in the range of data collecting card can acquire effectively.
Each point is scattered back the photosignal come and is acquired and stores by data collecting card at this time, generates a fiber optic temperature
Curve, and the scattering photosignal for waiting for follow-up light pulse to generate carries out cumulative peaceful equal data processing.Finally by computer
Carry out temperature demodulation and display.
Point type temperature-sensing system provided in an embodiment of the present invention based on fiber raman scattering is provided with above-described embodiment
The point type temperature sensing device technical characteristic having the same based on fiber raman scattering, so can also solve identical technology
Problem reaches identical technique effect.
The technique effect and aforementioned device embodiment phase of the system that the embodiment of the present invention is provided, realization principle and generation
Together, to briefly describe, system embodiment part does not refer to place, can refer to corresponding contents in aforementioned device embodiment.
It is apparent to those skilled in the art that for convenience and simplicity of description, the system of foregoing description
Specific work process, can refer to aforementioned device embodiment in corresponding process, details are not described herein.
In all examples being illustrated and described herein, any occurrence should be construed as merely illustrative, without
It is as limitation, therefore, other examples of exemplary embodiment can have different values.
It should be noted that：Similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined, then it further need not be defined and explained in subsequent attached drawing in a attached drawing.
In addition, in the description of the embodiment of the present invention unless specifically defined or limited otherwise, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
Can also be electrical connection to be mechanical connection；It can be directly connected, can also indirectly connected through an intermediary, Ke Yishi
Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood at this with concrete condition
Concrete meaning in invention.
In the description of the present invention, it should be noted that term "center", "upper", "lower", "left", "right", "vertical",
The orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" be based on the orientation or positional relationship shown in the drawings, merely to
Convenient for the description present invention and simplify description, do not indicate or imply the indicated device or element must have a particular orientation,
With specific azimuth configuration and operation, therefore it is not considered as limiting the invention.In addition, term " first ", " second ",
" third " is used for description purposes only, and is not understood to indicate or imply relative importance.
Finally it should be noted that：Embodiment described above, only specific implementation mode of the invention, to illustrate the present invention
Technical solution, rather than its limitations, scope of protection of the present invention is not limited thereto, although with reference to the foregoing embodiments to this hair
It is bright to be described in detail, it will be understood by those of ordinary skill in the art that：Any one skilled in the art
In the technical scope disclosed by the present invention, it can still modify to the technical solution recorded in previous embodiment or can be light
It is readily conceivable that variation or equivalent replacement of some of the technical features；And these modifications, variation or replacement, do not make
The essence of corresponding technical solution is detached from the spirit and scope of technical solution of the embodiment of the present invention, should all cover the protection in the present invention
Within the scope of.Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. a kind of point type temperature sensing device based on fiber raman scattering, which is characterized in that including：Fixed disk and setting are in institute
The measurement optical fiber in fixed disk is stated, the measurement optical fiber includes：Incident optical, disk fibre, the output optical fiber, the incident optical, disk
Fine, the output optical fiber is sequentially connected.
2. the point type temperature sensing device according to claim 1 based on fiber raman scattering, which is characterized in that described solid
Price fixing includes：Fixed pedestal and fixed ring, the fixed ring are mounted on the fixed pedestal.
3. the point type temperature sensing device according to claim 2 based on fiber raman scattering, which is characterized in that described solid
Determine pedestal and be provided with fixed part, the fixed part is for fixing the fixed ring.
4. the point type temperature sensing device according to claim 3 based on fiber raman scattering, which is characterized in that described solid
It includes first substrate and second substrate to determine pedestal, and the clamping fixation is formed between the first substrate and the second substrate
The space of ring.
5. the point type temperature sensing device according to claim 2 based on fiber raman scattering, which is characterized in that described solid
Determine ring and be provided with the first fixing groove and the second fixing groove, first fixing groove is connected with second fixing groove；Described
For one fixing groove for fixing the incident optical and the output optical fiber, second fixing groove is fine for fixing the disk.
6. the point type temperature sensing device according to claim 1 based on fiber raman scattering, which is characterized in that described solid
Price fixing includes：First end cover and with the matched second end cover of first end cover, the first end cover formed with the second end cover
For accommodating the space for measuring optical fiber；The first end cover is internally provided with the first fixing groove and the second fixing groove, described
First fixing groove is connected with second fixing groove, and first fixing groove is for fixing the incident optical and emergent light
Fibre, second fixing groove are fine for fixing the disk.
7. the point type temperature sensing device according to claim 1 based on fiber raman scattering, which is characterized in that the disk
Fibre includes multi-ring fiber coil.
8. the point type temperature sensing device according to claim 1 based on fiber raman scattering, which is characterized in that the survey
It includes single mode optical fiber or multimode fibre to measure optical fiber.
9. a kind of point type temperature-sensing system based on fiber raman scattering, which is characterized in that including：Optical fiber sensing host
And such as point type temperature sensing device of the claim 1-8 any one of them based on fiber raman scattering, the fiber optic temperature
Sensing host is connected with the point type temperature sensing device based on fiber raman scattering.
10. the point type temperature-sensing system according to claim 9 based on fiber raman scattering, which is characterized in that described
Point type temperature sensing device based on fiber raman scattering is one or more.
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