CN106323503A - Distributed optical fiber temperature sensor and system thereof - Google Patents
Distributed optical fiber temperature sensor and system thereof Download PDFInfo
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- CN106323503A CN106323503A CN201610960700.4A CN201610960700A CN106323503A CN 106323503 A CN106323503 A CN 106323503A CN 201610960700 A CN201610960700 A CN 201610960700A CN 106323503 A CN106323503 A CN 106323503A
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- temperature sensor
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- 239000013307 optical fiber Substances 0.000 title claims abstract description 59
- 230000003287 optical effect Effects 0.000 claims abstract description 37
- 239000000835 fiber Substances 0.000 claims abstract description 31
- 238000000034 method Methods 0.000 claims abstract description 14
- 238000012545 processing Methods 0.000 claims abstract description 6
- 238000007405 data analysis Methods 0.000 claims description 12
- 238000004891 communication Methods 0.000 claims description 4
- 238000012544 monitoring process Methods 0.000 claims description 4
- 230000008054 signal transmission Effects 0.000 claims description 3
- 238000009529 body temperature measurement Methods 0.000 claims description 2
- 239000004744 fabric Substances 0.000 claims description 2
- 230000008878 coupling Effects 0.000 claims 1
- 238000010168 coupling process Methods 0.000 claims 1
- 238000005859 coupling reaction Methods 0.000 claims 1
- 238000001514 detection method Methods 0.000 abstract description 4
- 238000001914 filtration Methods 0.000 abstract description 4
- 238000001069 Raman spectroscopy Methods 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 235000011089 carbon dioxide Nutrition 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 244000309464 bull Species 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
Classifications
-
- 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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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Temperature Or Quantity Of Heat (AREA)
Abstract
The invention discloses a distributed optical fiber temperature sensor, comprising a control module, an optical source emitter, a modulator, an amplifier, a carrier generator, a coupler, a demodulator, a filter, an optical splitter, a photoelectric detector and a data analyzing module, wherein the control module is used for controlling the optical source emitter to generate optical pulse signals and controlling the carrier generator to generate local carrier signals; local carrier signals are transmitted to the modulator and the demodulator by the carrier generator; modulated optical signals are obtained after optical pulse signals and local carrier signals are modulated by the modulator; modulated optical signals are transmitted to a sensor fiber after passing through the amplifier and the coupler; signals back-scattered by the sensor fiber are transmitted to the optical splitter after being demodulated by the demodulator and filtered by the filter; Stokes optical signals and Anti-Stokes optical signals are split by the optical splitter and respectively transmitted to the photoelectric detector; optical signals are converted into electric signals by the photoelectric detector and transmitted to the data analyzing module; electric signals are processed by the data analyzing module to obtain sensed temperature values. In a temperature detection process, the temperature sensor can conduct modulation, demodulation and filtering processing, so that the noise influence on scattered signals is reduced and the sensor has the relatively good anti-interference performance.
Description
Technical field
The present invention relates to technical field of optical fiber sensing, more particularly to a kind of distributed optical fiber temperature sensor and
Its system.
Background technology
When light transmits in a fiber, Ruili scattering, Brillouin scattering and Raman scattering can be produced.Wherein, Raman scattering
It is owing to the warm-up movement of optical fiber Middle molecule occurs energy exchange to produce with photon interaction.Therefore, light is generally utilized to pass
The Raman scattering effect broadcast is to measure temperature.
But, owing to the signal to noise ratio of Raman scattering signal is relatively low, cause existing fibre optic temperature sensor capacity of resisting disturbance
Poor, all do not reach requirement at aspects such as signal detection precision, signal handling capacities, measured temperature accuracy is relatively low, error
Greatly, it is impossible to be accurately positioned the position of temperature anomaly, it is impossible to be widely used in power system, oil tank, seabed tunnel etc. and temperature is supervised
Survey and require place that is higher and that be difficult to obtain temperature data.
Therefore, how providing the fibre optic temperature sensor that a kind of capacity of resisting disturbance is strong is that those skilled in the art need solution badly
Problem.
Summary of the invention
In view of this, the invention provides a kind of distributed optical fiber temperature sensor, by modulation and demodulation, and demodulation
After Filtering Processing, improve the capacity of resisting disturbance of scattered signal, improve the certainty of measurement of fibre optic temperature sensor.
To achieve these goals, the present invention adopts the following technical scheme that
A kind of distributed optical fiber temperature sensor, including: light source emitter, manipulator, amplifier, carrier generator, bonder,
Demodulator, wave filter, beam splitter, two photodetectors, control module and data analysis module；
Described control module controls described light source emitter and produces pulsed optical signals, and described control module controls described carrier wave and sends out
Raw device produces local carrier signal；Local carrier signal is sent respectively to described manipulator and described solution by described carrier generator
Adjust device；Pulsed optical signals and local carrier signal obtain modulating optical signal under the modulation of manipulator, and described amplifier is to described
Modulation optical signal is amplified processing, and sends to sensor fibre after described bonder couples, and will dissipate through sensor fibre
The signal being emitted back towards is sent to described demodulator by described bonder, and the signal demodulated is sent to described filter by described demodulator
Ripple device is filtered, and filtered signal is sent to described beam splitter by described wave filter, and described beam splitter decomposites stoke
This optical signal and anti-Stokes optical signal, and it is respectively sent to described photodetector；Described photodetector is respectively by this
Lentor optical signal and anti-Stokes optical signal are converted into the Stokes signal of telecommunication and the anti-Stokes signal of telecommunication, and are sent to
Described data analysis module, the described data analysis module Stokes signal of telecommunication and the anti-Stokes signal of telecommunication process, and obtain
To the temperature value sensed.
Optionally, described amplifier includes: EDFA erbium-doped fiber amplifier.
Optionally, also include: display module；Described temperature value is shown by described display module.
A kind of distributed optical fiber temperature transducer system, including: above-mentioned distributed optical fiber temperature sensor, with described point
The sensor fibre that cloth fibre optic temperature sensor is connected, by wired or wireless network and described distributed optical fiber temperature sensor
The server being connected, at least one monitor terminal being connected with described server；
The temperature of environment is measured by described distributed optical fiber temperature sensor by sensor fibre, and temperature measurement arrived
Being worth and sent to described server by wired or wireless network, described monitor terminal is by the temperature of described monitoring server environment
Value.
Optionally, also include: the alarm device being connected with described distributed optical fiber temperature sensor；Described alarm device exists
When described temperature value reaches preset temperature value, send alarm signal, and by wired or wireless mode by alarm signal through institute
State server to send to described monitor terminal.
Optionally, also include: be arranged at the temperature chamber between described bonder and described sensor fibre；Described temperature chamber exists
Described distributed optical fiber temperature sensor is demarcated before measuring ambient temperature.
Optionally, also include: the on-site manual alarm device being connected with described monitor terminal by wired or wireless mode；
Described on-site manual alarm device, when there is fortuitous event, sends report by the most manual triggering to described monitor terminal
Alert signal.
Optionally, described distributed optical fiber temperature sensor includes base and the display screen being positioned on described base；Wherein
It is arranged on the communication interface on described base, power interface, display lamp；Described display screen is by electrical mode and described display mould
The outfan of block is attached, and described power interface accesses the power supply of 220V/50Hz；Described light source emitter, described manipulator,
Described amplifier, described bonder, described demodulator, described wave filter, described beam splitter, said two photodetector, institute
State data analysis module, described control module, described carrier generator are arranged at the inside of described base.
Optionally, at least provided with a described distribution type fiber-optic temperature in described distributed optical fiber temperature transducer system
Degree sensor.
Optionally, heat sink and the fire-fighting link main frame of described alarm device signal is received, with described fire-fighting link
Main frame carries out fire fighter's mobile terminal of signal transmission.
Understand via above-mentioned technical scheme, compared with prior art, the open distributed fiber optic temperature provided of the present invention
First optical signal is passed through the Filtering Processing after modulation and demodulation, and demodulation by sensor, improves the anti-interference of scattered signal
Ability and stability, improve the certainty of measurement of fibre optic temperature sensor；Secondly in distributed optical fiber temperature transducer system,
Increase temperature chamber and demarcate distributed optical fiber temperature sensor, further increase the survey of distributed optical fiber temperature transducer system
Amount degree of accuracy；The alarm device that the last present invention is arranged in distributed optical fiber temperature transducer system, receives alarm signal
Heat sink, fire-fighting link device, the fire fighter's mobile terminal communicated by network and fire-fighting link main frame, not only carry
The high safety of system, and ensured the safety of equipment, simultaneously facilitate fire fighter and take urgent rescue measure, pole in time
The earth reduces the impact of temperature anomaly.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
In having technology to describe, the required accompanying drawing used is briefly described, it should be apparent that, the accompanying drawing in describing below is only this
Inventive embodiment, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to according to
The accompanying drawing provided obtains other accompanying drawing.
The structural representation of a kind of distributed optical fiber temperature sensor that Fig. 1 provides for the present invention；
The structural representation of another distributed optical fiber temperature sensor that Fig. 2 provides for the present invention；
The structural representation of a kind of distributed optical fiber temperature transducer system that Fig. 3 provides for the present invention；
The structural representation of the another kind of distributed optical fiber temperature transducer system that Fig. 4 provides for the present invention；
The structural representation of another distributed optical fiber temperature transducer system that Fig. 5 provides for the present invention；
The structure chart of a kind of distributed optical fiber temperature sensor that Fig. 6 provides for name of the present invention；
The topological diagram of a kind of distributed optical fiber temperature transducer system that Fig. 7 provides for the present invention.
In figure 6:
802 be base, 803 be display screen, 8020 be communication interface, 8021 be power interface, 8022 for display lamp.
In the figure 7:
801 be distributed optical fiber temperature sensor, 802 for server, 803 for monitor terminal, 804 for alarm device, 810 for fall
Temperature device, 820 be fire-fighting link main frame, 830 be fire fighter's mobile terminal.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Describe, it is clear that described embodiment is only a part of embodiment of the present invention rather than whole embodiments wholely.Based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under not making creative work premise
Embodiment, broadly falls into the scope of protection of the invention.
The embodiment of the invention discloses a kind of distributed optical fiber temperature sensor, the open distribution type fiber-optic provided of the present invention
Optical signal by the Filtering Processing after modulation and demodulation, and demodulation, is improve the anti-interference of scattered signal by temperature sensor
Ability and stability, improve the certainty of measurement of fibre optic temperature sensor.
A kind of distributed optical fiber temperature sensor as shown in Figure 1, including: light source emitter 1, manipulator 2, amplifier
3, bonder 4, demodulator 5, wave filter 6,7, two photodetectors 8 of beam splitter, data analysis module 9, control module 10 and
Carrier generator 11；
Control module 10 controls light source emitter 1 and produces pulsed optical signals, and control module 10 controls carrier generator 11 and produces
Local carrier signal；Local carrier signal is sent to manipulator 2 and demodulator 5 by carrier generator 11 respectively；Pulsed optical signals
Obtaining modulating optical signal under the modulation of manipulator 2 with local carrier signal, amplifier 3 is amplified place to modulation optical signal
Reason, and send to sensor fibre after bonder 4 couples, will be through the back scattered signal of sensor fibre by bonder 4
Giving demodulator 5, the signal demodulated is sent to described wave filter 6 and is filtered by described demodulator 5, and described wave filter 6 will
Filtered signal is sent to described beam splitter 7, and beam splitter 7 beam splitter 7 decomposites Stokes optical signal and anti-Stokes
Optical signal, and it is respectively sent to photodetector 8；Photodetector 8 is respectively by Stokes optical signal and anti-Stokes light
Signal is converted into the Stokes signal of telecommunication and the anti-Stokes signal of telecommunication, and is sent to data analysis module 9, data analysis module
9 process according to the Stokes signal of telecommunication and the anti-Stokes signal of telecommunication, obtain the temperature value sensed.
Back scattered signal includes stokes light and anti-Stokes light, wherein, the light intensity of stokes light and temperature
Spending unrelated, the light intensity of anti-Stokes light is as the conversion of temperature and changes.Anti-Stokes light intensity And Stokes
Light intensity The relation of ratio and temperature can be expressed as:
Wherein, For the coefficient relevant to temperature, For Planck's constant, For vacuum light speed, For incident light frequency, For glass
The graceful constant of Wurz, For absolute temperature.Temperature value can be calculated according to above-mentioned relation.
In order to optimize technique scheme further, amplifier 3 includes: EDFA erbium-doped fiber amplifier.
The English full name of EDFA is Erbium-doped Optical Fiber Amplifier.
As shown in Figure 2, in order to optimize technique scheme further, also include: display module 12；Display module 12 is right
Temperature value shows.
By display module, the temperature sensed is shown, more intuitively.
A kind of distributed optical fiber temperature transducer system provided for the embodiment of the present invention as shown in Figure 3, including: above-mentioned
Distributed optical fiber temperature sensor 801, the sensor fibre that is connected with distributed optical fiber temperature sensor 801, by wired or
The server 802 that wireless network is connected with distributed optical fiber temperature sensor 801, at least one prison being connected with server 802
Control terminal 803；
The temperature of environment is measured by distributed optical fiber temperature sensor by sensor fibre, and by measurement to temperature value lead to
Cross wired or wireless network to send to server, the monitor terminal temperature value by monitoring server environment.
As shown in Figure 4, in order to optimize technique scheme further, also include: with distributed optical fiber temperature sensor
801 alarm devices 804 being connected；Alarm device 804, when temperature value reaches preset temperature value, sends alarm signal, and passes through
Alarm signal is sent to monitor terminal 803 by wired or wireless mode through described server.
When the temperature perceived exceedes preset temperature value, illustrate that the ambient temperature of detection has been over safety value, deposit
In potential risks, the situation exceeding preset temperature value can be reported to the police by alarm device, such as, can use sound
Photoelectric alarm mode.May apply to fire detection or other scenes needing to carry out temperature sensing.
In order to optimize technique scheme further, also include: be arranged at distributed optical fiber temperature sensor 801 and sensing
Temperature chamber 805 between optical fiber；Distributed optical fiber temperature sensor 801 demarcated before measuring ambient temperature by temperature chamber 805.
Plus temperature chamber between distributed optical fiber temperature sensor and sensor fibre, it is possible to distributed fiber optic temperature is passed
Sensor carries out system calibrating, improves the accuracy of systematic survey further.
In order to optimize technique scheme further, also include: be connected with monitor terminal 803 by wired or wireless mode
On-site manual alarm device；On-site manual alarm device, when there is fortuitous event, is come to prison by the most manual triggering
Control terminal sends alarm signal.
In order to optimize technique scheme further, distributed optical fiber temperature sensor 801 includes base 802 and display
Screen 803；The communication interface 8020 that is provided with on base 802, power interface 8021, display lamp 8022；Display screen 803 passes through
Electrically mode is attached with the outfan of display module 12, and power interface 8021 accesses the power supply of 220V/50Hz；Light source is launched
Device 1, manipulator 2, amplifier 3, bonder 4, demodulator 5, wave filter 6, beam splitter 7, two photodetectors 8, data analysiss
Module 9, control module 10 and carrier generator 11 are arranged at the inside of base 802.
In order to optimize technique scheme further, at least provided with one in distributed optical fiber temperature transducer system
Distributed optical fiber temperature sensor 801.
In order to optimize technique scheme further, receive heat sink 810 and the fire-fighting connection of alarm device 804 signal
Dynamic main frame 820, with fire fighter's mobile terminal 830 that fire-fighting link main frame 820 carries out signal transmission.
Heat sink 810 arranges multiple according to power system, oil tank, the scale of seabed tunnel, mainly includes spraying cooling
Device, dry ice heat sink, and above-mentioned place arranges spraying ventilating device and dry ice heat sink the most simultaneously.
Alarm device sends alarm signal by wired or wireless mode to fire-fighting link main frame, and fire-fighting link main frame passes through
Warning message is sent to fire fighter's mobile terminal by the form of note, mail and other message；Wherein fire fighter moves
Terminal has multiple, wirelessly receives the notice of fire-fighting link main frame.
In this specification, each embodiment uses the mode gone forward one by one to describe, and what each embodiment stressed is and other
The difference of embodiment, between each embodiment, identical similar portion sees mutually.For device disclosed in embodiment
For, owing to it corresponds to the method disclosed in Example, so describe is fairly simple, relevant part sees method part and says
Bright.
Described above to the disclosed embodiments, makes professional and technical personnel in the field be capable of or uses the present invention.
Multiple amendment to these embodiments will be apparent from for those skilled in the art, as defined herein
General Principle can realize without departing from the spirit or scope of the present invention in other embodiments.Therefore, the present invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and principles disclosed herein and features of novelty phase one
The widest scope caused.
Claims (10)
1. a distributed optical fiber temperature sensor, it is characterised in that including: light source emitter, manipulator, amplifier, coupling
Device, demodulator, wave filter, beam splitter, two photodetectors, data analysis module, control module and carrier generator；
Described control module controls described light source emitter and produces pulsed optical signals, and described control module controls described carrier wave and sends out
Raw device produces local carrier signal；Local carrier signal is sent respectively to described manipulator and described solution by described carrier generator
Adjust device；Pulsed optical signals and local carrier signal obtain modulating optical signal, described amplifier pair under the modulation of described manipulator
Described modulation optical signal is amplified processing, and sends to sensor fibre after described bonder couples, will be through sense light
Fine back scattered signal is sent to described demodulator by described bonder, and the signal demodulated is sent to institute by described demodulator
Stating wave filter to be filtered, filtered signal is sent to described beam splitter by described wave filter, and described beam splitter decomposites this
Lentor optical signal and anti-Stokes optical signal, and it is respectively sent to described photodetector；Described photodetector is respectively
Stokes optical signal and anti-Stokes optical signal are converted into the Stokes signal of telecommunication and the anti-Stokes signal of telecommunication, concurrently
Giving described data analysis module, described data analysis module is carried out according to the Stokes signal of telecommunication and the anti-Stokes signal of telecommunication
Process, obtain the temperature value sensed.
Distributed optical fiber temperature sensor the most according to claim 1, it is characterised in that described amplifier includes: EDFA
Erbium-doped fiber amplifier.
Distributed optical fiber temperature sensor the most according to claim 1, it is characterised in that also include: display module；Described
Described temperature value is shown by display module.
4. a distributed optical fiber temperature transducer system, it is characterised in that including: described in claim 1-3 any one
Distributed optical fiber temperature sensor, the sensor fibre being connected with described distributed optical fiber temperature sensor, by wired or wireless
The server that network is connected with described distributed optical fiber temperature sensor, at least one monitoring being connected with described server is eventually
End；
The temperature of environment is measured by described distributed optical fiber temperature sensor by sensor fibre, and temperature measurement arrived
Being worth and sent to described server by wired or wireless network, described monitor terminal is by the temperature of described monitoring server environment
Value.
Distributed optical fiber temperature transducer system the most according to claim 4, it is characterised in that also include: with described point
The alarm device that cloth fibre optic temperature sensor is connected；Described alarm device, when described temperature value reaches preset temperature value, is sent out
Go out alarm signal, and by wired or wireless mode, alarm signal is sent to described monitor terminal through described server.
Distributed optical fiber temperature transducer system the most according to claim 4, it is characterised in that also include: be arranged at institute
State the temperature chamber between bonder and described sensor fibre；Described temperature chamber was demarcated described distributed before measuring ambient temperature
Fibre optic temperature sensor.
Distributed optical fiber temperature transducer system the most according to claim 4, it is characterised in that also include: by wired
Or the on-site manual alarm device that wireless mode is connected with described monitor terminal；Described on-site manual alarm device is occurring surprisingly
During situation, send alarm signal by the most manual triggering to described monitor terminal.
Distributed optical fiber temperature sensor the most according to claim 1, it is characterised in that described distributed fiber optic temperature passes
Sensor includes base and the display screen being positioned on described base；Be provided with the communication interface on described base, power interface,
Display lamp；Described display screen is attached by the outfan of electrical mode with described display module, and described power interface accesses
The power supply of 220V/50Hz；Described light source emitter, described manipulator, described amplifier, described bonder, described demodulator, institute
State wave filter, described beam splitter, said two photodetector, described data analysis module, described control module, described carrier wave
Generator is arranged at the inside of described base.
Distributed optical fiber temperature transducer system the most according to claim 5, it is characterised in that at described distribution type fiber-optic
At least provided with a described distributed optical fiber temperature sensor in temperature sensor system.
Distributed optical fiber temperature transducer system the most according to claim 5, it is characterised in that receive described dress of reporting to the police
The heat sink of confidence number and fire-fighting link main frame, the fire fighter carrying out signal transmission with described fire-fighting link main frame moves
Terminal.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610960700.4A CN106323503A (en) | 2016-10-26 | 2016-10-26 | Distributed optical fiber temperature sensor and system thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610960700.4A CN106323503A (en) | 2016-10-26 | 2016-10-26 | Distributed optical fiber temperature sensor and system thereof |
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| CN203561437U (en) * | 2013-11-04 | 2014-04-23 | 山东省科学院激光研究所 | Random-position fiber-distributed sound wave sensor |
| CN105043586A (en) * | 2015-05-28 | 2015-11-11 | 华中科技大学 | Few-mode fiber based Raman distributed temperature measurement system and temperature measurement method |
| CN105352625A (en) * | 2015-10-21 | 2016-02-24 | 国家电网公司 | Temperature measurement system for dry-type hollow reactor |
| CN206223322U (en) * | 2016-10-26 | 2017-06-06 | 上海腾盛智能安全科技股份有限公司 | A kind of distributed optical fiber temperature sensor and its system |
-
2016
- 2016-10-26 CN CN201610960700.4A patent/CN106323503A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101091651A (en) * | 2007-07-20 | 2007-12-26 | 华中科技大学 | Device and method for detecting depth of anesthesia |
| US20120183015A1 (en) * | 2009-10-01 | 2012-07-19 | Lios Technology Gmbh | Apparatus and method for spatially resolved temperature measurement |
| CN203561437U (en) * | 2013-11-04 | 2014-04-23 | 山东省科学院激光研究所 | Random-position fiber-distributed sound wave sensor |
| CN105043586A (en) * | 2015-05-28 | 2015-11-11 | 华中科技大学 | Few-mode fiber based Raman distributed temperature measurement system and temperature measurement method |
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