CN108827354A - Many reference amounts distribution type optical fiber sensing equipment - Google Patents
Many reference amounts distribution type optical fiber sensing equipment Download PDFInfo
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- CN108827354A CN108827354A CN201810373254.6A CN201810373254A CN108827354A CN 108827354 A CN108827354 A CN 108827354A CN 201810373254 A CN201810373254 A CN 201810373254A CN 108827354 A CN108827354 A CN 108827354A
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
- G01D5/32—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light
- G01D5/34—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells
- G01D5/353—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells influencing the transmission properties of an optical fibre
- G01D5/35338—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells influencing the transmission properties of an optical fibre using other arrangements than interferometer arrangements
- G01D5/35354—Sensor working in reflection
- G01D5/35358—Sensor working in reflection using backscattering to detect the measured quantity
- G01D5/35364—Sensor working in reflection using backscattering to detect the measured quantity using inelastic backscattering to detect the measured quantity, e.g. using Brillouin or Raman backscattering
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
- G01D5/32—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light
- G01D5/34—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells
- G01D5/353—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells influencing the transmission properties of an optical fibre
- G01D5/35383—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells influencing the transmission properties of an optical fibre using multiple sensor devices using multiplexing techniques
- G01D5/35387—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells influencing the transmission properties of an optical fibre using multiple sensor devices using multiplexing techniques using wavelength division multiplexing
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Abstract
The present invention provides a kind of many reference amounts distribution type optical fiber sensing equipments, including：Laser, the first coupler, the second coupler, the first optical modulator, fiber amplifier, third coupler, scrambler, optical circulator, wavelength division multiplexer, optical filter, the second optical modulator, the 4th coupler, the first photodetector, the 5th coupler, the second photodetector, third photodetector, digital sampling and processing, detection optical fiber, many reference amounts distribution type optical fiber sensing equipment provided by the invention realizes while measuring vibration, temperature and strain parameter, equipment investment cost is reduced, the waste of fiber resource is reduced.
Description
Technical field
The invention belongs to technical field of optical fiber sensing, are to be related to a kind of many reference amounts distributing optical fiber sensing more specifically
Device.
Background technique
Distributed Optical Fiber Sensing Techniques characterize in optical fiber, fault location and optic fibre environment temperature, stress and vibration etc.
Monitoring aspect has important application.Optical time domain reflection technology, optical time-domain analysis technology, optical frequency domain analysis technology are distribution type fiber-optics
Several common technologies in sensing technology, still, the corresponding Fibre Optical Sensor parameter of every kind of technology are less, it is difficult to meet actual monitoring
To the monitoring requirements of a variety of environment parameters in.For example, the optical time domain reflectometer based on optical time domain reflection technology can only be to light
Fibre is characterized, such as chromatic dispersion measurement, loss measurement and fiber failure positioning, and cannot temperature and stress to optic fibre environment
Etc. being monitored.Although Brillouin optical time-domain reflectometer is able to achieve temperature, stress monitoring and fiber failure positioning etc., but be difficult
For optical fiber characterization and chromatic dispersion measurement, and it is difficult to obtain the spatial resolution of sub- rice magnitude and high temperature, stress are differentiated
Rate.Brillouin optical time domain analysis technology can obtain high spatial resolution and temperature compared with Brillouin light time domain reflection technology
Degree, stress resolution ratio, but need to inject pump light and continuous light from the both ends of tested optical fiber respectively, once tested optical fiber is broken,
Measuring system will be unable to work.
Distributed fiberoptic sensor has obtained answering extensively in fields such as electric power, petrochemical industry, traffic, building and space flight at present
With.But with the raising that every profession and trade production safety requires, the distributed fiberoptic sensor having a single function has been unable to meet needs,
User generally requires to carry out full side to parameters such as temperature, vibration and strains simultaneously in order to which engineering safety situation is appreciated more fully
Position real time monitoring, generally requiring outfit at least two sets of different distributed fiberoptic sensors can just meet the requirements, and not only equipment is thrown
It is big to provide cost, and wastes a large amount of fiber resource.
Summary of the invention
The purpose of the present invention is to provide a kind of many reference amounts distribution type optical fiber sensing equipments, it is intended to solve same in the prior art
When need to be equipped with equipment investment cost caused by more set distributed fiberoptic sensors when monitoring to parameters such as temperature, vibration, strains high
And the problem of fiber resource waste.
To achieve the above object, the embodiment of the present invention provides a kind of many reference amounts distribution type optical fiber sensing equipment, including：Laser
Device, the first coupler, the second coupler, the first optical modulator, fiber amplifier, third coupler, scrambler, optical circulator,
Wavelength division multiplexer, optical filter, the second optical modulator, the 4th coupler, the first photodetector, unilateral modulator, the 5th coupling
Clutch, the second photodetector, digital sampling and processing, detection optical fiber；
The laser of narrowband that the laser issues is divided into two ways of optical signals after entering first coupler；Enter institute all the way
The input terminal of the second coupler is stated, another way enters the input terminal of second optical modulator as the first reference light；Described
Incident light is divided into two-way by two couplers, is entered first optical modulator as the first detection light all the way and is modulated, another
Road enters after the unilateral modulation of the unilateral modulator progress and is divided into two ways of optical signals by the 5th coupler, is all the way second
Light is detected, another way is the second reference light；The first detection light passes through first optical modulator and the fiber amplifier
Into an input terminal of the third coupler, the second detection light enters another input of the third coupler
End；The output end of the third coupler connects the end B of optical circulator described in the end A of the optical circulator by the scrambler
The detection optical fiber is connected, the C-terminal of the optical circulator connects the input terminal of the wavelength division multiplexer, and the optical circulator is used for
The detection optical fiber will be input to the second detection light by the first detection light after scrambler upset polarization state,
It is also used to export the rear orientation light generated in the detection optical fiber to the wavelength division multiplexer；
For first output end of the wavelength division multiplexer for exporting Brillouin scattering, the Brillouin scattering passes through institute
An input terminal for entering the 4th coupler after optical filter filters is stated, first reference light passes through the second light tune
Enter another input terminal of the 4th coupler after device modulation processed, the output end of the 4th coupler passes through described first
Photodetector connects the digital sampling and processing；The second output terminal of the wavelength division multiplexer is for exporting Rayleigh scattering
Light, the Rayleigh scattering light enter an input terminal of the 6th coupler, and second reference light enters the 6th coupling
Another input terminal of clutch, the output end of the 6th coupler connect the data by second photodetector and adopt
Collect processing module；The digital sampling and processing is used for by the cloth after the first photodetector photoelectric conversion
Deep pool scattering light carries out analog-to-digital conversion and handles and obtain with by the Rayleigh scattering light after the second photodetector photoelectric conversion
Vibration, temperature and the strain information of the detection optical fiber.
Further, many reference amounts distribution type optical fiber sensing equipment, which is characterized in that further include：Third photoelectricity is visited
Survey device, the 4th photodetector；The wavelength division multiplexer further includes third output end and the 4th output end；
The third output end of the wavelength division multiplexer is for exporting Raman anti-Stokes scattering light, this anti-support of the Raman
Ke Si scatters light by entering the digital sampling and processing after the third photodetector photoelectric conversion；The wavelength-division is multiple
Pass through the described 4th for exporting Raman Stokes ratio, the Raman Stokes ratio with the 4th output end of device
Enter the digital sampling and processing after photodetector photoelectric conversion；
The digital sampling and processing is to by this anti-support of the Raman after the third photodetector photoelectric conversion
Ke Si scatter light with by after the second photodetector photoelectric conversion Raman Stokes ratio carry out analog-to-digital conversion with
It handles and obtains the temperature information of the detection optical fiber.
Further, many reference amounts distribution type optical fiber sensing equipment further includes：Optoisolator；
The laser connects first coupler by the optoisolator.
Further, the central wavelength of the laser is 1550nm, and bandwidth is -3dB, frequency 5KHz.
Further, the coupling ratio of first coupler, second coupler and the 5th coupler is 90:
10 to 70:Between 30
Further, the optical modulator is acousto-optic modulator or electrooptic modulator.
Further, the fiber amplifier is erbium-doped fiber amplifier.
Further, the optical filter is tunable optic filter or fiber grating filter.
The beneficial effect of many reference amounts distribution type optical fiber sensing equipment provided in an embodiment of the present invention is：With prior art phase
It provides than, the embodiment of the present invention by providing a kind of many reference amounts distribution type optical fiber sensing equipment, including：Laser, the first coupling
Device, the second coupler, the first optical modulator, fiber amplifier, third coupler, scrambler, optical circulator, wavelength division multiplexer,
Optical filter, the second optical modulator, the 4th coupler, the first photodetector, the 5th coupler, the second photodetector,
Three photodetectors, digital sampling and processing, detection optical fiber realize while measuring vibration, temperature and strain parameter, reduce
Equipment investment cost, reduces the waste of fiber resource.
Detailed description of the invention
Fig. 1 is the structural block diagram of many reference amounts distribution type optical fiber sensing equipment provided in an embodiment of the present invention；
Fig. 2 is the structural block diagram for many reference amounts distribution type optical fiber sensing equipment that further embodiment of this invention provides.
Appended drawing reference：Laser 1, the first coupler 2, the second coupler 3, the first optical modulator 4, fiber amplifier 5,
Three couplers 6, scrambler 7, optical circulator 8, wavelength division multiplexer 9, optical filter 10, the second optical modulator 11, the 4th coupler
12, the first photodetector 13, unilateral modulator 14, the 5th coupler 15, the 6th coupler 16, the second photodetector 17,
Digital sampling and processing 18, detection optical fiber 19, third photodetector 20, the 4th photodetector 21.
Specific embodiment
In order to which technical problems, technical solutions and advantages to be solved are more clearly understood, tie below
Accompanying drawings and embodiments are closed, the present invention will be described in further detail.It should be appreciated that specific embodiment described herein is only
To explain the present invention, it is not intended to limit the present invention.
Specific embodiment：
As shown in Figure 1, the embodiment of the present invention provides a kind of many reference amounts distribution type optical fiber sensing equipment, including：Laser 1,
First coupler 2, the second coupler 3, the first optical modulator 4, fiber amplifier 5, third coupler 6, scrambler 7, ring of light shape
It is device 8, wavelength division multiplexer 9, optical filter 10, the second optical modulator 11, the 4th coupler 12, the first photodetector 13, unilateral
Modulator 14, the 5th coupler 15, the second photodetector 17, digital sampling and processing 18, detection optical fiber 19；
The laser of narrowband that the laser 1 issues is divided into two ways of optical signals after first coupler 2；Enter all the way
The input terminal of second coupler 3, another way enter the input terminal of second optical modulator 11 as the first reference light；Institute
It states the second coupler 3 and incident light is divided into two-way, enter first optical modulator 4 as the first detection light all the way and adjusted
System, another way enter after the unilateral modulator 14 carries out unilateral modulation and are divided by the 5th coupler 15 for two-way light letter
Number, it is all the way the second detection light, another way is the second reference light；The first detection light by first optical modulator 4 with
The fiber amplifier 5 enters an input terminal of the third coupler 6, and the second detection light is coupled into the third
Another input terminal of device 6；The output end of the third coupler 6 connects the A of the optical circulator 8 by the scrambler 7
End, the end B of the optical circulator 8 connect the detection optical fiber 19, and the C-terminal of the optical circulator 8 connects the wavelength division multiplexer 9
Input terminal, the optical circulator 8 is used to that the first detection light and described the after polarization state will to be upset by the scrambler 7
Two detection light are input to the detection optical fiber 19, are also used to export the rear orientation light in the detection optical fiber 19 generation described in
Wavelength division multiplexer 9；
For exporting Brillouin scattering, the Brillouin scattering passes through first output end of the wavelength division multiplexer 9
The optical filter 10 enters an input terminal of the 4th coupler 12 after filtering, first reference light passes through described the
Enter another input terminal of the 4th coupler 12, the output end of the 4th coupler 12 after the modulation of two optical modulators 11
The digital sampling and processing 18 is connected by first photodetector 13；Second output of the wavelength division multiplexer 9
End enters an input terminal of the 6th coupler, second ginseng for exporting Rayleigh scattering light, the Rayleigh scattering light
Another input terminal that light enters the 6th coupler is examined, the output end of the 6th coupler is visited by second photoelectricity
It surveys device 17 and connects the digital sampling and processing 18；The digital sampling and processing 18 is used to visit to by first photoelectricity
The Brillouin scattering after surveying 13 photoelectric conversion of device is dissipated with by the Rayleigh after 17 photoelectric conversion of the second photodetector
Light is penetrated to carry out analog-to-digital conversion and handle and obtain vibration, temperature and the strain information of the detection optical fiber 19.
The wavelength division multiplexer 9 is for discrete Brillouin scattering and the Rayleigh scattering light；
The optical filter 10 is used to be promoted the optical signal to noise ratio of Brillouin scattering；
First optical modulator 4 and second optical modulator 11, for laser of narrowband to be modulated into light pulse signal；
The fiber amplifier 5, for promoting the peak power of light pulse signal.
The optical circulator 8 is a kind of optical device with characteristics of non-reciprocity of multiport.Optical signals either port is defeated
It is fashionable, it can be exported according to arrow instruction sequence or alpha-numeric identifiers from lower Single port with the loss of very little, and the port is logical
Loss to other ports is all very big, becomes and is not communicated with port.For example, if the end A of signal from the optical circulator 8 is defeated
Enter, then the loss exported from the end B is minimum, and the end B is signal output end；If signal is inputted from the end B, the loss exported from C-terminal is most
Small, C-terminal is signal output end.
The scrambler 7 detects the polarization state of light for changing the first detection light and described second.Working principle is
When polarised light transmits in the medium with birefringence, since o light is different with the transmission speed of e light, cause a light
Relatively another light generates Retardation, changes so as to cause the polarization state of light.
First coupler 2, second coupler 3 and the 5th coupler 15 are 1*2 photo-coupler, are used for
Two ways of optical signals will be divided by incident light all the way；The third coupler 6, the 4th coupler 12 and the 6th coupler 16
It is 2*1 photo-coupler, for being exported after two-way incident light is coupled as optical signal all the way.
The course of work of many reference amounts distribution type optical fiber sensing equipment is：Described in the laser of narrowband warp that laser 1 issues
First coupler 2 divides for two-way：The laser of narrowband that the first via is 80%, the laser of narrowband that the second tunnel is 20%, and the second tunnel
As the first reference light.First via laser of narrowband divides by second coupler 3 for two-way, all the way as the first detection light,
Enter the detection by first optical modulator 4, the fiber amplifier 5, the third coupler 6, the scrambler 7
Optical fiber 19, and backward Brillouin scattering light is generated in the detection optical fiber 19, which filters through wavelength division multiplexer 9, light
Wave device 10 enters the 4th coupler 12, and first reference light enters described after second optical modulator 11 modulation
4th coupler 12, and beat frequency interference occurs with backward Brillouin scattering light, generated interference signal is through first photoelectricity
Detector 13 enters the digital sampling and processing 18, and the digital sampling and processing 18 is by measuring the interference signal
Frequency shift amount and Strength Changes can be obtained the temperature information and strain information of the detection optical fiber 19, first via laser of narrowband warp
Another way after crossing second coupler 3 generates the laser letter of centre frequency linear frequency sweep after the unilateral modulator 14
Number, the laser signal of the centre frequency linear frequency sweep is divided into the second detection light and institute after the 5th coupler 15
The second reference light is stated, the second detection light enters the detection optical fiber 19 by the third coupler 6, the scrambler 7,
To Rayleigh scattering light after the detection optical fiber 19 generation, the backward Rayleigh scattering light enters by the wavelength division multiplexer 9
6th coupler, second reference light also enters the 6th coupler, and carries out with the backward Rayleigh scattering light
The backward Rayleigh scattering light beat frequency interference signal of beat frequency interference, generation enters the data by second photodetector 17
Acquisition processing module 18, the digital sampling and processing 18 are segmented rear to described in Rayleigh scattering light beat frequency interference signal
Cross correlation process can be obtained the vibration information of the detection optical fiber 19 by observing the shape of cross correlation process result.
The beneficial effect of many reference amounts distribution type optical fiber sensing equipment provided in an embodiment of the present invention is：With prior art phase
It provides than, the embodiment of the present invention by providing a kind of many reference amounts distribution type optical fiber sensing equipment, including：Laser 1, first couples
Device 2, the second coupler 3, the first optical modulator 4, fiber amplifier 5, third coupler 6, scrambler 7, optical circulator 8, wavelength-division
Multiplexer 9, optical filter 10, the second optical modulator 11, the 4th coupler 12, the first photodetector 13, the 5th coupler 15,
Second photodetector 17, third photodetector 20, digital sampling and processing 18, detection optical fiber 19, realize while surveying
Amount vibration, temperature and strain parameter, reduce equipment investment cost, reduce the waste of fiber resource.
Further, as shown in Fig. 2, many reference amounts distribution type optical fiber sensing equipment, which is characterized in that further include：
Third photodetector 20, the 4th photodetector 21；The wavelength division multiplexer 9 further includes third output end and the 4th output
End；
The third output end of the wavelength division multiplexer 9 for exporting Raman anti-Stokes scattering light, the Raman it is anti-this
Lentor scatters light by entering the digital sampling and processing 18 after 20 photoelectric conversion of third photodetector；It is described
For exporting Raman Stokes ratio, the Raman Stokes ratio passes through 4th output end of wavelength division multiplexer 9
Enter the digital sampling and processing 18 after 4th photodetector, 21 photoelectric conversion；
18 pairs of the digital sampling and processing anti-by the Raman after 20 photoelectric conversion of third photodetector
Stokes ratio carries out modulus with by the Raman Stokes ratio after 17 photoelectric conversion of the second photodetector
Conversion and processing simultaneously obtain the temperature information of the detection optical fiber 19.
Using the front end of the detection optical fiber 19 as reference optical fiber, its temperature is set as reference temperature, is dissipated further according to Raman
Temperature of the intensity of the anti-Stokes light and stokes light of penetrating light than the detection optical fiber 19 can be measured.Raman scattering is only
It is temperature sensitive insensitive to straining, temperature-compensating and the verifying of temperature data can be carried out to Brillouin sensing, improve temperature
The accuracy of measurement data.
Further, many reference amounts distribution type optical fiber sensing equipment further includes：Optoisolator；
The laser 1 connects first coupler 2 by the optoisolator.The optoisolator be allow light to
By preventing the passive device passed through round about, effect is limited the direction of light in one direction, makes light can only
One direction transmission improves light wave transmissions efficiency
Further, the central wavelength of the laser 1 is 1550nm, and bandwidth is -3dB, frequency 5KHz.
Further, the coupling ratio of first coupler, second coupler and the 5th coupler is 90:
10 to 70:Between 30
Further, the optical modulator is acousto-optic modulator or electrooptic modulator.
Further, the fiber amplifier 5 is erbium-doped fiber amplifier 5.
Further, the optical filter 10 is tunable optic filter or fiber grating filter.
It should be noted that it can be directly another when element is referred to as " being fixed on " or " being set to " another element
On one element or indirectly on another element.When an element is known as " being connected to " another element, it can
To be directly to another element or be indirectly connected on another element.
It is to be appreciated that term " length ", " width ", "upper", "lower", "front", "rear", "left", "right", "vertical",
The orientation or positional relationship of the instructions such as "horizontal", "top", "bottom" "inner", "outside" is that orientation based on the figure or position are closed
System, is merely for convenience of description of the present invention and simplification of the description, rather than the device or element of indication or suggestion meaning must have
Specific orientation is constructed and operated in a specific orientation, therefore is not considered as limiting the invention.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include one or more of the features.In the description of the present invention, the meaning of " plurality " is two or more,
Unless otherwise specifically defined.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (8)
1. a kind of many reference amounts distribution type optical fiber sensing equipment, which is characterized in that including：Laser, the first coupler, the second coupling
Device, the first optical modulator, fiber amplifier, third coupler, scrambler, optical circulator, wavelength division multiplexer, optical filter,
Two optical modulators, the 4th coupler, the first photodetector, unilateral modulator, the 5th coupler, the 6th coupler, the second light
Electric explorer, digital sampling and processing, detection optical fiber；
The laser of narrowband that the laser issues is divided into two ways of optical signals after first coupler；Enter described all the way
The input terminal of two couplers, another way enter the input terminal of second optical modulator as the first reference light；Second coupling
Incident light is divided into two-way by clutch, all the way as first detection light enter first optical modulator be modulated, another way into
Enter the unilateral modulator to carry out being divided into two ways of optical signals by the 5th coupler after unilateral modulation, is all the way second to detect
Light, another way are the second reference light；The first detection light is entered by first optical modulator and the fiber amplifier
One input terminal of the third coupler, the second detection light enter another input terminal of the third coupler；Institute
The output end for stating third coupler connects the end A of the optical circulator, the end the B connection of the optical circulator by the scrambler
The detection optical fiber, the C-terminal of the optical circulator connect the input terminal of the wavelength division multiplexer, and the optical circulator is for will be by
The first detection light and the second detection light after the scrambler upset polarization state are input to the detection optical fiber, also use
In the rear orientation light that output is generated in the detection optical fiber to the wavelength division multiplexer；
First output end of the wavelength division multiplexer passes through the light for exporting Brillouin scattering, the Brillouin scattering
Enter an input terminal of the 4th coupler after filter filtering, first reference light passes through second optical modulator
Enter another input terminal of the 4th coupler after modulation, the output end of the 4th coupler passes through first photoelectricity
Detector connects the digital sampling and processing；The second output terminal of the wavelength division multiplexer is used to export Rayleigh scattering light,
The Rayleigh scattering light enters an input terminal of the 6th coupler, and second reference light enters the 6th coupler
Another input terminal, the output end of the 6th coupler connected at the data acquisition by second photodetector
Manage module；The digital sampling and processing to by the Brillouin after the first photodetector photoelectric conversion for dissipating
It penetrates light and is carried out analog-to-digital conversion and processing and obtained described by the Rayleigh scattering light after the second photodetector photoelectric conversion
Vibration, temperature and the strain information of detection optical fiber.
2. many reference amounts distribution type optical fiber sensing equipment according to claim 1, which is characterized in that further include：Third photoelectricity
Detector, the 4th photodetector；The wavelength division multiplexer further includes third output end and the 4th output end；
The third output end of the wavelength division multiplexer is for exporting Raman anti-Stokes scattering light, the Raman anti-Stokes
Light is scattered by entering the digital sampling and processing after the third photodetector photoelectric conversion；The wavelength division multiplexer
The 4th output end for exporting Raman Stokes ratio, the Raman Stokes ratio passes through the 4th photoelectricity
Enter the digital sampling and processing after detector photoelectric conversion；
The digital sampling and processing is to by the Raman anti-Stokes after the third photodetector photoelectric conversion
It scatters light and carries out analog-to-digital conversion and processing with by the Raman Stokes ratio after the second photodetector photoelectric conversion
And obtain the temperature information of the detection optical fiber.
3. many reference amounts distribution type optical fiber sensing equipment according to claim 1, which is characterized in that further include：Optoisolator；
The laser connects first coupler by the optoisolator.
4. many reference amounts distribution type optical fiber sensing equipment according to claim 1-3, it is characterised in that：The laser
The central wavelength of device is 1550nm, and bandwidth is -3dB, frequency 5KHz.
5. many reference amounts distribution type optical fiber sensing equipment according to claim 1, it is characterised in that：First coupler,
The coupling ratio of second coupler and the 5th coupler is 90:10 to 70:Between 30.
6. many reference amounts distribution type optical fiber sensing equipment according to claim 1-3, it is characterised in that：The light tune
Device processed is acousto-optic modulator or electrooptic modulator.
7. many reference amounts distribution type optical fiber sensing equipment according to claim 1-3, it is characterised in that：The optical fiber
Amplifier is erbium-doped fiber amplifier.
8. many reference amounts distribution type optical fiber sensing equipment according to claim 1-3, it is characterised in that：The light filter
Wave device is tunable optic filter or fiber grating filter.
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