CN109974887A - A kind of distributed Raman fiber temperature sensor system - Google Patents
A kind of distributed Raman fiber temperature sensor system Download PDFInfo
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- CN109974887A CN109974887A CN201811585734.5A CN201811585734A CN109974887A CN 109974887 A CN109974887 A CN 109974887A CN 201811585734 A CN201811585734 A CN 201811585734A CN 109974887 A CN109974887 A CN 109974887A
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- 239000000835 fiber Substances 0.000 title claims abstract description 37
- 238000001069 Raman spectroscopy Methods 0.000 title claims abstract description 24
- 230000003287 optical effect Effects 0.000 claims abstract description 27
- 239000013307 optical fiber Substances 0.000 claims description 15
- 238000007689 inspection Methods 0.000 claims 1
- 230000005622 photoelectricity Effects 0.000 claims 1
- 238000010276 construction Methods 0.000 abstract description 2
- 238000001514 detection method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 239000012141 concentrate Substances 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
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- 230000008054 signal transmission Effects 0.000 description 2
- 208000033748 Device issues Diseases 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010892 electric spark Methods 0.000 description 1
- 230000005713 exacerbation Effects 0.000 description 1
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- 238000005259 measurement Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 1
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Classifications
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- 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
- G01K1/02—Means for indicating or recording specially adapted for thermometers
- G01K1/024—Means for indicating or recording specially adapted for thermometers for remote indication
-
- 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
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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
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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
- 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
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Temperature Or Quantity Of Heat (AREA)
- Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)
Abstract
The invention discloses a kind of distributed Raman fiber temperature-sensing systems, it includes casing and the control module, pulse laser generator, optical splitter, photoswitch, image intensifer, wavelength division multiplexer, photoelectric detector, computer system and the power supply that are mounted in the casing, and the control module control connects the pulse laser generator, photoswitch and computer system；The pulse laser generator connects the input/output terminal of the optical splitter, and the input/output end of the photoswitch connects the first input/output end of the optical splitter, and the input/output terminal of the photoswitch connects sensor fibre；Second input/output end of the optical splitter connects the input terminal of the image intensifer；The output end of the image intensifer connects the input terminal of the wavelength division multiplexer, and the output end of the wavelength division multiplexer connects the input terminal of the photoelectric detector；The output end of the photoelectric detector connects the computer system, and the present invention has remote continuous temperature sensing, widely used, the advantages that reducining the construction costs.
Description
Technical field
The present invention relates to a kind of distributed Raman fiber temperature sensor systems.
Background technique
Temperature is the important indicator in production and living, and temperature sensor is widely used in all trades and professions, traditional temperature
Sensing is based on electric signal, and safety and stability is poor under the application scenarios that inflammable and explosive or strong electromagnetic infects, and is passed
The point sensor of system can not be carried out continuously sensor measuring, and detection range is very limited simultaneously, also needs to be laid with dedicated signal wire exacerbation
Cost of investment.
Distributed Raman fiber temperature-sensing system is based on Ramam effect, uses optical fibers as temperature sensitive media and letter
The temperature-sensing system of number transport vehicle, when light source is propagated in a fiber, due to light Raman scattering can in spectrum key light
The two sides in source generate scattering peak value, are referred to as stokes light and anti-Stokes light, the energy of the two light is temperature
Function, by will be scattered back come Raman light wave through solution wavelength-division multiplex, photoelectric conversion, amplification, after demodulation, be sent into signal processing system
Temperature signal real-time display can be come out and pass through control module by system goes control execution unit；And it is incident by light wave in optical fiber
Time, the echo time for scattering light wave difference and light spread speed in a fiber determine sensing point position.
The incident light of existing Raman fiber temperature sensor is easy to generate Raman diffused light interference effect measurement, simultaneously
Detectivity and detection range are limited, can not apply in the exigent occasion of detectivity；There is no PWM port and linear
Port can only carry out the ability that temperature sensing lacks the execution unit of control rear end；There is no audio output port then inadequate human nature
Change.
Summary of the invention
It is an object of the invention to overcome the deficiency of the prior art, provides a kind of distributed Raman fiber temperature sensor system
System.
The technical solution adopted by the present invention to solve the technical problems is:
A kind of distributed Raman fiber temperature-sensing system, including control module, pulse laser generator, optical splitter, light
Switch, image intensifer, wavelength division multiplexer, photoelectric detector, computer system and power supply；Described in the control module control connection
Pulse laser generator, photoswitch and computer system；The pulse laser generator connects the input terminal of the optical splitter, institute
The input/output terminal for stating photoswitch connects the input terminal of the optical splitter, and the input/output end of the photoswitch connects sense light
It is fine；The second output terminal of the optical splitter connects the input terminal of the image intensifer；The output end of the image intensifer connects institute
The input terminal of wavelength division multiplexer is stated, the output end of the wavelength division multiplexer connects the input terminal of the photoelectric detector；The light
The output end of photodetector connects the computer system, and the power supply is that each module and device are powered.
It in a further preferred embodiment, further include casing, the control module, pulse laser generator, optical splitter, light are opened
Pass, image intensifer, wavelength division multiplexer, photoelectric detector, computer system and power supply are arranged in the casing.
In a further preferred embodiment, the control module include control panel and touching of being connect with the control panel by
Key/LCD MODULE, audio port, the port RS485, alarm port, PWM port and linear port, the touch key
To input instruction, the audio port to connect outer audio equipment realize voice broadcast, the port RS485 to
External equipment is communicated, and the alarm port issues alarm, the PWM port and linear port to connect warning device
To control the execution unit of rear end, the control panel is arranged in the casing, and the touch key is arranged in the casing
Front panel, the casing is arranged in the audio port, the port RS485, alarm port, PWM port and linear port
Rear panel.
In a further preferred embodiment, the computer system includes computer motherboard, hard disk, data acquisition card, display
Device port, the port RJ45 and USB port, the computer motherboard, data acquisition card and hard disk are arranged in the casing internal, institute
The input terminal for stating data acquisition card connects the photoelectric detector acquisition signal, the output end connection of the data acquisition card
The I/O mouth of the computer motherboard, computer system are analyzed and processed received signal；The display port is to even
External display is connect, the rear panel of the casing is arranged in connect network in the port RJ45, and the USB port is including setting
Set the rear USB port in the preceding USB port and the rear panel that the casing is arranged in of the front panel of the casing, the preceding USB
Port and rear USB port are to connect external equipment progress information exchange.
It in a further preferred embodiment, further include radiator, the side panel of the casing is equipped with heat release hole for being mounted on machine
Radiator on the inside of the side panel of shell radiates, and the power supply connects the radiator and is powered.
In a further preferred embodiment, the power supply includes power panel, power switch, power supply indicator, power input
Mouth and power supply adaptor, the power panel setting are arranged in the casing internal, the power switch and power supply indicator in institute
State on the front panel of casing, the power input port is arranged on the rear panel of the casing, the power supply adaptor it is defeated
It is that the power panel is powered that outlet, which connects the power input port,.
It in a further preferred embodiment, further include the fuse holder for being mounted on the rear panel of the casing, the fuse
Fuse is inserted on seat, the fuse connects the power supply.
In a further preferred embodiment, the sensor fibre passes through the optical fiber being arranged on the rear panel of the casing and inputs
Port connects the photoswitch.
It in a further preferred embodiment, further include that the signal lamp of the front panel of the casing is set and is arranged in institute
State the ground terminal of the rear panel of casing, the signal lamp to indexed optical fiber signal condition, the ground terminal to
Connection ground line further includes the signal lamp that the front panel of the casing is arranged in and the rear panel that the casing is arranged in
Ground terminal, the signal lamp is to indexed optical fiber signal condition, and the ground terminal is to connect ground line.
The beneficial effects of the present invention are:
1, pulse laser generator sends the pulse laser for being encoded and having modulated and enters optical splitter, reversible due to optical splitter
Property, the exportable optical signal of merging end is sent into selected optical-fibre channel after photoswitch selects；The light returned by fibre scattering
Wave is divided into two-way by optical splitter: being dropped all the way into pulse laser generator, another way is amplified into solution by image intensifer
Wavelength division multiplexer solves Stokes and anti-Stokes two-beam wave, respectively enters photoelectric detector, resulting electric signal into
Enter computer system to carry out operational analysis and obtain to realize remote and continuous temperature with the various electric signals of fiber optic temperature variation
Sensing；Optical fiber has electric insulating quality, without spies such as electric spark, electromagnetic-radiation-free, strong antijamming capability, lightning protection, waterproof and dustproofs
Property in the environment of inflammable, explosive and electromagnetic interference still have good safety and stability；Optical fiber is both sensitivity
Element, and be the carrier of temperature signal transmission, do not have to be laid with signal transmission cable, while the light laid can also be utilized
Fibre is reducingd the construction costs；Be added optical splitter, using the mutually isolated property between optical splitter input terminal can prevent the light wave of light source into
Enter wavelength division multiplexer, reduces interference of the incident light to Raman diffused light；Be added image intensifer, improve detectivity and detection away from
From.
2, audio port is arranged to connect external audio to input instruction in setting touch key/LCD MODULE
Equipment realization can be used for audio alert, voice prompting etc., improve the humanization level of system, the setting port RS485 to it is outer
Portion's equipment is communicated, and setting alarm port issues alarm to connect warning device, and PWM port is arranged and linear port is used
To control the execution unit of rear end；The front panel of the casing is arranged in as operator's raising in touch key/LCD MODULE
Good interaction, after the casing is arranged in audio port, the port RS485, alarm port, PWM port and linear port
Panel is easy to manage concentratedly the signal wire for connecting each port.
3, computer system includes computer motherboard, hard disk, data acquisition card, display port, the port RJ45 and the end USB
Mouthful, the computer motherboard, data acquisition card and hard disk setting connect in the casing internal, the input terminal of the data acquisition card
The photoelectric detector acquisition signal is connect, the output end of the data acquisition card connects the I/O mouth of the computer motherboard,
Computer system is analyzed and processed received signal.The display port is to connect external display, the RJ45
It includes the front panel that the casing is arranged in that the rear panel of the casing, which is arranged in, to connect network, the USB port in port
Preceding USB port and be arranged in the casing rear panel rear USB port, the preceding USB port and rear USB port are to even
It connects external equipment and carries out information exchange.
5, control panel output increases audio port, PWM port and linear port, not only improves hommization, but also adapt to
A variety of execution units.
6, it is radiated by the way that radiator is arranged, avoids high temperature from influencing system detection accuracy, prolong the service life.
7, power supply includes power panel, power switch, power supply indicator, power input port and power supply adaptor, and power supply is opened
It closes to be arranged on the front panel of casing with power supply indicator and controls on/off and instruction power work state, the power supply respectively
Input port is arranged on the rear panel of the casing, and the output end of the power supply adaptor connects the power input port and is
The power panel is powered.
8, by the way that fuse holder is arranged, it is inserted with fuse on the fuse holder, improves circuit safety.
9, sensor fibre passes through the optic fibre input end mouth connection photoswitch being arranged on the rear panel of the casing, sense light
Fibre concentrates on the rear panel centralized management of casing.
10, by be arranged in casing front panel signal lamp with indexed optical fiber signal condition, by being arranged in institute
The ground terminal connection ground line for stating the rear panel of casing is grounded protection.
Invention is further described in detail with reference to the accompanying drawings and embodiments；But a kind of distributed Raman of the invention
Optical fiber temperature transducer system is not limited to the embodiment.
Detailed description of the invention
Fig. 1 is the functional block diagram of a preferred embodiment of the present invention；
Fig. 2 is the structural schematic diagram of a preferred embodiment of the present invention；
Fig. 3 is the structural schematic diagram of the front panel of a preferred embodiment of the present invention；
Fig. 4 is the structural schematic diagram of the rear panel of a preferred embodiment of the present invention.
Specific embodiment
Embodiment, referring to FIG. 1 to FIG. 4, a kind of distributed Raman fiber temperature sensor system of the invention, packet
It includes the casing with front panel 1, rear panel 15, upper cover (not shown), pedestal 3 and upper cover (not shown) and is mounted on
Control module 32, pulse laser generator 12 in the casing, optical splitter 9, photoswitch 8, image intensifer 6, wavelength division multiplexer
10, photoelectric detector 11, computer system 31 and power supply 26；The control module 32 include control panel 25 and with the control panel
Touch key/LCD MODULE 4, the audio port 21, the port RS485 22, alarm port 37, PWM port 38 of 25 connections
With linear port 39, the touch key 28 is to input instruction, and the audio port 21 is to connect outer audio equipment reality
Existing voice broadcast, the port RS485 22 with external equipment to be communicated, and the alarm port 37 is to connect alarm
Device issues alarm, the execution unit of the PWM port 38 and linear port 39 to control rear end, and the control panel 25 is arranged
In the casing, the touch key 28 is arranged on the front panel 1 of the casing, the audio port 21, the port RS485
22, alarm port 37, PWM port 38 and linear port 39 are arranged on the rear panel 15 of the casing；The control module
32 controls connect the pulse laser generator 12, photoswitch 8 and computer system 31；The pulse laser generator 12 connects
The input/output terminal of the optical splitter 9, the input/output terminal of the photoswitch 8 connect the optical splitter 9 first output/it is defeated
Enter end, input/output end connects sensor fibre；Second input/output end of the optical splitter 9 connects the image intensifer 6
Input terminal；The output end of the image intensifer 6 connects the input terminal of the photoelectric detector 11；The photoelectric detector 11 it is defeated
Outlet connects the computer system 31, and the computer system 31 includes data acquisition card 18 and computer 33, the signal
Capture card 18 connects the photoelectric detector 11 and acquires signal, and the computer 33 connects the data acquisition card 18 and receives signal
And received signal is analyzed and processed；The computer 33 include computer motherboard 14, hard disk 13, display port 34,
The port RJ45 19 and USB port 35, the computer motherboard 14 and hard disk 13 are arranged at the casing internal, the display end
For mouth 34 to connect the display module 4 that the front panel 1 of the casing is arranged in, the casing is arranged in the port RJ45 19
For rear panel 15 to external communication device, the USB port 35 includes the preceding USB port 5 that the front panel 1 of the casing is arranged in
With the rear USB port 17 for the rear panel 15 that the casing is arranged in, the preceding USB port 5 and rear USB port 17 are outer to connect
Portion's equipment carries out information exchange；The power supply is that each module and device are powered, and the power supply includes that power panel 26, power supply are opened
2, power supply indicator 29, power input port 23 and power supply adaptor are closed, the power panel 26 is arranged in the casing internal, institute
It states power switch 2 and power supply indicator 29 is arranged on the front panel 1 of the casing, the power input port 23 is arranged in institute
It states on the rear panel 15 of casing, it is the power panel 26 that the output end of the power supply adaptor, which connects the power input port 23,
It is powered.
The side panel of the casing is equipped with heat release hole and radiates for being mounted on the radiator 27 on the inside of the side panel of casing,
The power supply connects the radiator 27 and is powered.It is radiated by the way that radiator 27 is arranged, avoids high temperature from influencing system and visit
Precision is surveyed, is prolonged the service life；The rear panel 15 of the casing is equipped with fuse holder 24, is inserted with guarantor on the fuse holder 24
Dangerous silk, the fuse connect the power supply, improve circuit safety；The sensor fibre passes through after the casing is arranged in
Optic fibre input end mouth 16 on panel 15 connects 15 concentrate tube of rear panel that the photoswitch 8 concentrates on casing convenient for sensor fibre
Reason；The ground terminal 20 of the signal lamp 7 of the front panel 1 of the casing and the rear panel 15 that the casing is set, it is described
Signal lamp 7 is to indexed optical fiber signal condition, and the ground terminal 20 is to connect ground line, by the way that casing is arranged in
The signal lamp 7 of front panel 1 is with indexed optical fiber signal condition, the ground terminal of the rear panel 15 by the way that the casing is arranged in
20 connection ground lines are grounded protection.
The working principle of the invention: pulse laser generator 12 sends the pulse laser for being encoded and having modulated and enters optical splitter
9, due to the invertibity of optical splitter 9, the exportable optical signal of merging end is sent into selected optical fiber after the selection of photoswitch 8 and is led to
Road；Two-way is divided by optical splitter 9 by the light wave that fibre scattering returns: entering pulse laser generator 12 all the way and is dropped, it is another
Routing image intensifer 6 be amplified into solution wavelength division multiplexer 10, solve Stokes and anti-Stokes two-beam wave, respectively into
Enter photoelectric detector 11, resulting electric signal enters the progress operational analysis of computer system 31 and obtains with each of fiber optic temperature variation
Kind electric signal realizes remote and continuous temperature sensing.
Above-described embodiment is only used to further illustrate a kind of distributed Raman fiber temperature sensor system of the invention, but
It is to the above embodiments according to the technical essence of the invention any simply to repair the invention is not limited to embodiment
Change, equivalent variations and modification, falls within the scope of protection of technical solution of the present invention.
Claims (9)
1. a kind of distributed Raman fiber temperature-sensing system, it is characterised in that: it includes control module, pulse laser generation
Device, optical splitter, photoswitch, image intensifer, wavelength division multiplexer, photoelectric detector, computer system and power supply；The control module
Control connects the pulse laser generator, photoswitch and computer system；The pulse laser generator connects the light splitting
The input/output terminal of device, the input/output terminal of the photoswitch connect the first input/output end of the optical splitter, the light
The input/output end of switch connects sensor fibre；Second input/output end of the optical splitter connects the defeated of the image intensifer
Enter end；The output end of the image intensifer connects the input terminal of the wavelength division multiplexer, and the output end of the wavelength division multiplexer connects
Connect the input terminal of the photoelectric detector；The output end of the photoelectric detector connects the computer system, and the power supply is
Each module and device are powered.
2. a kind of distributed Raman fiber temperature sensor system according to claim 1, it is characterised in that: further include machine
Shell, the control module, pulse laser generator, optical splitter, photoswitch, image intensifer, wavelength division multiplexer, photoelectric detector,
Computer system and power supply are arranged in the casing.
3. a kind of distributed Raman fiber temperature sensor system according to claim 2, it is characterised in that: the control
Module includes control panel, touch key/LCD MODULE and the audio port connecting with the control panel, the port RS485, report
Alert device port, PWM port and linear port, the touch key is to input instruction, and the audio port is to connect outside
Audio frequency apparatus realizes voice broadcast, and the port RS485 with external equipment to be communicated, and the alarm port is to even
Alarm device of being informed of a case issues alarm, the execution unit of the PWM port and linear port to control rear end, the control panel setting
In the casing, the touch key/LCD MODULE is arranged on the front panel of the casing, the audio port,
The port RS485, alarm port, PWM port and linear port are arranged on the rear panel of the casing.
4. a kind of distributed Raman fiber temperature sensor system according to claim 2, it is characterised in that: the calculating
Machine system includes computer motherboard, hard disk, data acquisition card, display port, the port RJ45 and USB port, the computer
In the casing internal, the input terminal of the data acquisition card connects the photoelectricity inspection for mainboard, data acquisition card and hard disk setting
It surveys device and acquires signal, the output end of the data acquisition card connects the I/O mouth of the computer motherboard, computer system pair
Received signal is analyzed and processed；The display port is arranged to connect external display, the port RJ45 in institute
The rear panel of casing is stated to connect network, the USB port include be arranged in the front panel of the casing preceding USB port and
Be arranged in the rear USB port of the rear panel of the casing, the preceding USB port and rear USB port to connect external equipment into
Row information exchange.
5. a kind of distributed Raman fiber temperature sensor system according to claim 2, it is characterised in that: further include dissipating
Hot device, the side panel of the casing is equipped with heat release hole and radiates for being mounted on the radiator on the inside of the side panel of casing, described
Power panel and the radiator carry out heat transfer connection.
6. a kind of distributed Raman fiber temperature sensor system according to claim 2, it is characterised in that: the power supply
Including power panel, power switch, power supply indicator, power input port, power panel setting is described in the casing internal
Power switch and power supply indicator are arranged on the front panel of the casing, and the casing is arranged in the power input port
On rear panel.
7. a kind of distributed Raman fiber temperature sensor system according to claim 2, it is characterised in that: further include peace
Mounted in the fuse holder of the rear panel of the casing, it is inserted with fuse on the fuse holder, described in the fuse connection
Power supply.
8. a kind of distributed Raman fiber temperature sensor system according to claim 2, it is characterised in that: the sensing
Optical fiber passes through the optic fibre input end mouth being arranged on the rear panel of the casing and connects the photoswitch.
9. a kind of distributed Raman fiber temperature sensor system according to claim 2, it is characterised in that: further include setting
The ground terminal in the signal lamp and the rear panel that the casing is arranged in of the front panel of the casing is set, the signal refers to
Show lamp to indexed optical fiber signal condition, the ground terminal is to connect ground line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201811585734.5A CN109974887A (en) | 2018-12-24 | 2018-12-24 | A kind of distributed Raman fiber temperature sensor system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811585734.5A CN109974887A (en) | 2018-12-24 | 2018-12-24 | A kind of distributed Raman fiber temperature sensor system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111722068A (en) * | 2020-06-16 | 2020-09-29 | 江苏方天电力技术有限公司 | High-voltage cable monitoring system and method |
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| CN111722068A (en) * | 2020-06-16 | 2020-09-29 | 江苏方天电力技术有限公司 | High-voltage cable monitoring system and method |
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