CN206223322U - A kind of distributed optical fiber temperature sensor and its system - Google Patents
A kind of distributed optical fiber temperature sensor and its system Download PDFInfo
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- CN206223322U CN206223322U CN201621170903.5U CN201621170903U CN206223322U CN 206223322 U CN206223322 U CN 206223322U CN 201621170903 U CN201621170903 U CN 201621170903U CN 206223322 U CN206223322 U CN 206223322U
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Abstract
The utility model discloses a kind of distributed optical fiber temperature sensor and its system, including：Control module control light source emitter produces pulsed optical signals, and control carrier generator to produce local carrier signal；Local carrier signal is sent to modulator and demodulator by carrier generator；Pulsed optical signals and local carrier signal obtain modulated optical signal under the modulation of modulator, sent after amplified device and coupler to sensor fibre, optical splitter is sent to after the filtering process of the demodulated device demodulation wave filter of the back scattered signal of sensor fibre, optical splitter decomposites Stokes optical signal and anti-Stokes optical signal, and is respectively sent to photodetector；Photodetector converts optical signals into electric signal, and is sent to data analysis module, and data analysis module is processed electric signal, the temperature value for being sensed.The utility model is modulated in temperature course is detected, the treatment of demodulation filtering, reduces influence of the noise to scattered signal, there is preferable anti-interference.
Description
Technical field
The utility model is related to technical field of optical fiber sensing, more particularly to a kind of distributed fiber temperature sensing
Device and its system.
Background technology
When light is transmitted in a fiber, rayleigh scattering, Brillouin scattering and Raman scattering can be produced.Wherein, Raman scattering
It is to be produced because the warm-up movement of molecule in optical fiber and photon interaction occur energy exchange.Therefore, generally passed using light
The Raman scattering effect broadcast carrys out temperature of the measurement.
But, because the signal to noise ratio of Raman scattering signal is relatively low, cause existing fibre optic temperature sensor antijamming capability
It is poor, requirement is not reached 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 higher and be difficult to obtain the place of temperature data.
Therefore, how to provide a kind of fibre optic temperature sensor of strong antijamming capability is those skilled in the art's urgent need to resolve
Problem.
The content of the invention
In view of this, the utility model provides a kind of distributed optical fiber temperature sensor, by modulation and demodulation, and
Filtering process after demodulation, improves the antijamming capability of scattered signal, improves the certainty of measurement of fibre optic temperature sensor.
To achieve these goals, the utility model is adopted the following technical scheme that：
A kind of distributed optical fiber temperature sensor, including：Light source emitter, modulator, amplifier, carrier generator, coupling
Clutch, demodulator, wave filter, optical splitter, two photodetectors, control module and data analysis modules；
The control module controls the light source emitter to produce pulsed optical signals, and the control module controls the load
Wave producer produces local carrier signal；Local carrier signal is sent respectively to the modulator and institute by the carrier generator
State demodulator；Pulsed optical signals and local carrier signal obtain modulated optical signal, the amplifier pair under the modulation of modulator
The modulated optical signal is amplified treatment, and is sent to sensor fibre by after coupler coupling, will be by sense light
Fine back scattered signal is sent to the demodulator by the coupler, and the signal that the demodulator will be demodulated is sent to institute
State wave filter to be filtered, filtered signal is sent to the optical splitter by the wave filter, the optical splitter decomposites this
Lentor optical signal and anti-Stokes optical signal, and it is respectively sent to the photodetector；The photodetector difference
Stokes optical signal and anti-Stokes optical signal are converted into Stokes electric signal and anti-Stokes electric signal, concurrently
The data analysis module is given, at the data analysis module Stokes electric signal and anti-Stokes electric signal
Reason, the temperature value for being sensed.
Optionally, the amplifier includes：EDFA erbium-doped fiber amplifiers.
Optionally, also include：Display module；The display module shows to the temperature value.
A kind of distributed optical fiber temperature transducer system, including：Above-mentioned distributed optical fiber temperature sensor, with described point
The connected sensor fibre of cloth fibre optic temperature sensor, by wired or wireless network and the distributed optical fiber temperature sensor
Connected server, at least one monitor terminal being connected with the server；
The distributed optical fiber temperature sensor measured by sensor fibre to the temperature of environment, and will be measured
Temperature value is sent to the server by wired or wireless network, and the monitor terminal is by the monitoring server environment
Temperature value.
Optionally, also include：The warning device being connected with the distributed optical fiber temperature sensor；The warning device exists
When the temperature value reaches preset temperature value, send alarm signal, and by wired or wireless mode by alarm signal through institute
Server is stated to send to the monitor terminal.
Optionally, also include：It is arranged at the thermostat between the coupler and the sensor fibre；The thermostat exists
The distributed optical fiber temperature sensor is demarcated before determination of the environment temperature.
Optionally, also include：The on-site manual warning device being connected with the monitor terminal by wired or wireless way；
The on-site manual warning device sends report by artificial manual triggering when there is fortuitous event to the monitor terminal
Alert signal.
Optionally, the distributed optical fiber temperature sensor includes base and the display screen on the base；Wherein
It is arranged on communication interface, power interface, indicator lamp on the base；The display screen is by electrical mode and the display mould
The output end of block is attached, and the power interface accesses the power supply of 220V/50Hz；The light source emitter, the modulator,
The amplifier, the coupler, the demodulator, the wave filter, the optical splitter, described two photodetectors, institute
State the inside that data analysis module, the control module, the carrier generator are arranged at the base.
Optionally, at least provided with a distribution type fiber-optic temperature in the distributed optical fiber temperature transducer system
Degree sensor.
Optionally, the heat sink and fire-fighting link main frame of the warning device signal are received, with the fire-fighting link
Main frame carries out fire fighter's mobile terminal of signal transmission.
Understand that compared with prior art, the utility model discloses the distribution type fiber-optic of offer via above-mentioned technical scheme
Temperature sensor, by the filtering process after modulation and demodulation, and demodulation, improves the anti-of scattered signal first by optical signal
Interference performance and stability, improve the certainty of measurement of fibre optic temperature sensor；Secondly in distributed optical fiber temperature sensor system
In system, increase thermostat to demarcate distributed optical fiber temperature sensor, further increase distributed optical fiber temperature sensor system
The measuring accuracy of system；The warning device that last the utility model is set in distributed optical fiber temperature transducer system, receives
The heat sink of alarm signal, fire-fighting link device, the fire fighter communicated with fire-fighting link main frame by network are moved
Terminal, not only increases the security of system, and has ensured the safety of equipment, while being easy to fire fighter to take in time promptly
Rescue measure, significantly reduces the influence of temperature anomaly.
Brief description of the drawings
In order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art, below will be to embodiment
Or the accompanying drawing to be used needed for description of the prior art is briefly described, it should be apparent that, drawings in the following description are only
It is embodiment of the present utility model, for those of ordinary skill in the art, on the premise of not paying creative work, also
Other accompanying drawings can be obtained according to the accompanying drawing for providing.
A kind of structural representation of distributed optical fiber temperature sensor that Fig. 1 is provided for the utility model；
The structural representation of another distributed optical fiber temperature sensor that Fig. 2 is provided for the utility model；
A kind of structural representation of distributed optical fiber temperature transducer system that Fig. 3 is provided for the utility model；
The structural representation of another distributed optical fiber temperature transducer system that Fig. 4 is provided for the utility model；
The structural representation of another distributed optical fiber temperature transducer system that Fig. 5 is provided for the utility model；
A kind of structure chart of distributed optical fiber temperature sensor that Fig. 6 is provided for the utility model name；
A kind of topological diagram of distributed optical fiber temperature transducer system that Fig. 7 is provided for the utility model.
In figure 6：
802 is base, 803 is display screen, 8020 is communication interface, 8021 is power interface, 8022 is indicator lamp.
In the figure 7：
801 is distributed optical fiber temperature sensor, 802 is server, 803 is monitor terminal, 804 is warning device, 810
For heat sink, 820 be fire-fighting link main frame, 830 be fire fighter's mobile terminal.
Specific embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is carried out
Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of the utility model, rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not under the premise of creative work is made
The every other embodiment for being obtained, belongs to the scope of the utility model protection.
The utility model embodiment discloses a kind of distributed optical fiber temperature sensor, and the utility model discloses dividing for offer
Optical signal by the filtering process after modulation and demodulation, and demodulation, is improve scattered signal by cloth fibre optic temperature sensor
Antijamming capability 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, modulator 2, amplifier
3rd, coupler 4, demodulator 5, wave filter 6,7, two photodetectors 8 of optical splitter, data analysis module 9, the and of control module 10
Carrier generator 11；
The control light source emitter 1 of control module 10 produces pulsed optical signals, and the control carrier generator 11 of control module 10
Produce local carrier signal；Local carrier signal is sent to modulator 2 and demodulator 5 by carrier generator 11 respectively；Pulsed light
Signal and local carrier signal obtain modulated optical signal under the modulation of modulator 2, and amplifier 3 is amplified to modulated optical signal
Treatment, and sent to sensor fibre by after the coupling of coupler 4, coupler 4 will be passed through by the back scattered signal of sensor fibre
Demodulator 5 is sent to, the signal that the demodulator 5 will be demodulated is sent to the wave filter 6 and is filtered, the wave filter 6
Filtered signal is sent to the optical splitter 7, the optical splitter 7 of optical splitter 7 decomposites Stokes optical signal and anti-stoke
This optical signal, and it is respectively sent to photodetector 8；Photodetector 8 is respectively by Stokes optical signal and anti-Stokes
Optical signal is converted into Stokes electric signal and anti-Stokes electric signal, and is sent to data analysis module 9, data analysis mould
Block 9 is processed according to Stokes electric signal and anti-Stokes electric signal, the temperature value for being sensed.
Back scattered signal includes stokes light and anti-Stokes light, wherein, light intensity and the temperature of stokes light
Degree is unrelated, and the light intensity of anti-Stokes light is changed with the conversion of temperature.Anti-Stokes light intensityAnd Stokes
Light intensityThe ratio between can be expressed as with the relation of temperature：
Wherein,It is the coefficient related to temperature,It is Planck's constant,It is vacuum light speed,It is incident light frequency,It is Boltzmann constant,It is absolute temperature.Temperature value can be calculated according to above-mentioned relation.
In order to further optimize above-mentioned technical proposal, amplifier 3 includes：EDFA erbium-doped fiber amplifiers.
The English full name of EDFA is Erbium-doped Optical Fiber Amplifier.
As shown in Figure 2, in order to further optimize above-mentioned technical proposal, also include：Display module 12；Display module 12 pairs
Temperature value is shown.
The temperature for sensing is shown by display module, more intuitively.
It is as shown in Figure 3 a kind of distributed optical fiber temperature transducer system that the utility model embodiment is provided, including：
The sensor fibre that above-mentioned distributed optical fiber temperature sensor 801 is connected with distributed optical fiber temperature sensor 801, by having
The server 802 that line or wireless network are connected with distributed optical fiber temperature sensor 801, at least be connected with server 802
Individual monitor terminal 803；
Distributed optical fiber temperature sensor is measured by sensor fibre to the temperature of environment, and the temperature that will be measured
Value sends the temperature value for passing through monitoring server environment to server, monitor terminal by wired or wireless network.
As shown in Figure 4, in order to further optimize above-mentioned technical proposal, also include：With distributed optical fiber temperature sensor
801 connected warning devices 804；Warning device 804 sends alarm signal, and pass through when temperature value reaches preset temperature value
Wired or wireless mode sends to monitor terminal 803 alarm signal through the server.
When the temperature for perceiving exceedes preset temperature value, illustrate that the environment temperature of detection has been over safety value, deposit
In potential risks, the situation more than preset temperature value can be alarmed by warning device, for example, can use sound
Photoelectric alarm mode.May apply to fire detection or other needs to carry out the scene of temperature sensing.
In order to further optimize above-mentioned technical proposal, also include：It is arranged at distributed optical fiber temperature sensor 801 and sensing
Thermostat 805 between optical fiber；Thermostat 805 demarcated distributed optical fiber temperature sensor 801 before determination of the environment temperature.
Thermostat is added between distributed optical fiber temperature sensor and sensor fibre, distributed fiber optic temperature can be passed
Sensor carries out system calibrating, further improves the accuracy of systematic survey.
In order to further optimize above-mentioned technical proposal, also include：It is connected with monitor terminal 803 by wired or wireless way
On-site manual warning device；On-site manual warning device when there is fortuitous event, by artificial manual triggering come to prison
Control terminal sends alarm signal.
In order to further optimize above-mentioned technical proposal, distributed optical fiber temperature sensor 801 includes base 802 and display
Screen 803；It is provided with communication interface 8020, power interface 8021, indicator lamp 8022 on base 802；Display screen 803 passes through
Electrical mode is attached with the output end of display module 12, and power interface 8021 accesses the power supply of 220V/50Hz；Light source is launched
Device 1, modulator 2, amplifier 3, coupler 4, demodulator 5, wave filter 6,7, two photodetectors 8, data analysis of optical splitter
Module 9, control module 10 and carrier generator 11 are arranged at the inside of base 802.
In order to further optimize above-mentioned technical proposal, at least provided with one in distributed optical fiber temperature transducer system
Distributed optical fiber temperature sensor 801.
In order to further optimize above-mentioned technical proposal, the heat sink 810 and fire-fighting connection of the signal of warning device 804 are received
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 sets multiple according to the scale of power system, oil tank, seabed tunnel, mainly including spraying cooling
Device, dry ice heat sink, and above-mentioned place sets spraying ventilating device and dry ice heat sink simultaneously mostly.
Warning device sends alarm signal by wired or wireless way to fire-fighting link main frame, and fire-fighting link main frame passes through
The form of short message, mail and other message sends to fire fighter's mobile terminal warning message；Wherein fire fighter's movement
Terminal has multiple, wirelessly receives the notice of fire-fighting link main frame.
Each embodiment is described by the way of progressive in this specification, and what each embodiment was stressed is and other
The difference of embodiment, between each embodiment identical similar portion mutually referring to.For device disclosed in embodiment
For, because it is corresponded to the method disclosed in Example, so description is fairly simple, related part is said referring to method part
It is bright.
The foregoing description of the disclosed embodiments, enables professional and technical personnel in the field to realize or new using this practicality
Type.Various modifications to these embodiments will be apparent for those skilled in the art, determine herein
The General Principle of justice can in other embodiments be realized in the case where spirit or scope of the present utility model are not departed from.Cause
This, the utility model is not intended to be limited to the embodiments shown herein, and is to fit to and principles disclosed herein
The most wide scope consistent with features of novelty.
Claims (10)
1. a kind of distributed optical fiber temperature sensor, it is characterised in that including：Light source emitter, modulator, amplifier, coupling
Device, demodulator, wave filter, optical splitter, two photodetectors, data analysis module, control module and carrier generators；
The control module controls the light source emitter to produce pulsed optical signals, and the control module controls the carrier wave hair
Raw device produces local carrier signal；Local carrier signal is sent respectively to the modulator and the solution by the carrier generator
Adjust device；Pulsed optical signals and local carrier signal obtain modulated optical signal, the amplifier pair under the modulation of the modulator
The modulated optical signal is amplified treatment, and is sent to sensor fibre by after coupler coupling, will be by the biography
Photosensitive fine back scattered signal is sent to the demodulator by the coupler, and the signal that the demodulator will be demodulated sends
It is filtered to the wave filter, filtered signal is sent to the optical splitter by the wave filter, the optical splitter is decomposed
Go out Stokes optical signal and anti-Stokes optical signal, and be respectively sent to the photodetector；The photodetector
Stokes optical signal and anti-Stokes optical signal are converted into Stokes electric signal and anti-Stokes electric signal respectively,
And the data analysis module is sent to, the data analysis module is according to Stokes electric signal and anti-Stokes electric signal
Processed, the temperature value for being sensed.
2. distributed optical fiber temperature sensor according to claim 1, it is characterised in that the amplifier includes：EDFA
Erbium-doped fiber amplifier.
3. distributed optical fiber temperature sensor according to claim 1, it is characterised in that also include：Display module；It is described
Display module shows to the temperature value.
4. distributed optical fiber temperature sensor according to claim 3, it is characterised in that the distributed fiber optic temperature is passed
Sensor includes base and the display screen on the base；Be provided with communication interface on the base, power interface,
Indicator lamp；The display screen is attached by electrical mode with the output end of the display module, and the power interface is accessed
The power supply of 220V/50Hz；The light source emitter, the modulator, the amplifier, the coupler, the demodulator, institute
State wave filter, the optical splitter, described two photodetectors, the data analysis module, the control module, the carrier wave
Generator is arranged at the inside of the base.
5. a kind of distributed optical fiber temperature transducer system, it is characterised in that including：Described in claim 1-4 any one
Distributed optical fiber temperature sensor, the sensor fibre being connected with the distributed optical fiber temperature sensor, by wired or
The server that wireless network is connected with the distributed optical fiber temperature sensor, at least one monitoring being connected with the server
Terminal；
The distributed optical fiber temperature sensor is measured by sensor fibre to the temperature of environment, and the temperature that will be measured
Value sends the temperature for passing through the monitoring server environment to the server, the monitor terminal by wired or wireless network
Value.
6. distributed optical fiber temperature transducer system according to claim 5, it is characterised in that also include：With described point
The connected warning device of cloth fibre optic temperature sensor；The warning device is sent out when the temperature value reaches preset temperature value
Go out alarm signal, and alarm signal is sent to the monitor terminal through the server by wired or wireless mode.
7. distributed optical fiber temperature transducer system according to claim 5, it is characterised in that also include：It is arranged at institute
State the thermostat between coupler and the sensor fibre；The thermostat demarcated the distribution before determination of the environment temperature
Fibre optic temperature sensor.
8. distributed optical fiber temperature transducer system according to claim 5, it is characterised in that also include：By wired
Or the on-site manual warning device that wireless mode is connected with the monitor terminal；The on-site manual warning device is occurring surprisingly
During situation, alarm signal is sent to the monitor terminal by artificial manual triggering.
9. distributed optical fiber temperature transducer system according to claim 5, it is characterised in that in the distribution type fiber-optic
At least provided with a distributed optical fiber temperature sensor in temperature sensor system.
10. distributed optical fiber temperature transducer system according to claim 6, it is characterised in that receive the alarm dress
The heat sink and fire-fighting link main frame of confidence number, the fire fighter for carrying out signal transmission with the fire-fighting link main frame move
Terminal.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201621170903.5U CN206223322U (en) | 2016-10-26 | 2016-10-26 | A kind of distributed optical fiber temperature sensor and its system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106323503A (en) * | 2016-10-26 | 2017-01-11 | 上海腾盛智能安全科技股份有限公司 | Distributed optical fiber temperature sensor and system thereof |
| CN108132109A (en) * | 2018-01-31 | 2018-06-08 | 广州汉光电气股份有限公司 | A kind of temperature-measuring system of distributed fibers |
| CN111623902A (en) * | 2020-06-05 | 2020-09-04 | 上海交通大学 | Distributed optical fiber Raman temperature sensor based on intensity modulation chirp pulse compression |
| CN113899465A (en) * | 2021-11-11 | 2022-01-07 | 天津津航技术物理研究所 | Optical fiber temperature-sensing fire detection device for fire fighting |
-
2016
- 2016-10-26 CN CN201621170903.5U patent/CN206223322U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106323503A (en) * | 2016-10-26 | 2017-01-11 | 上海腾盛智能安全科技股份有限公司 | Distributed optical fiber temperature sensor and system thereof |
| CN108132109A (en) * | 2018-01-31 | 2018-06-08 | 广州汉光电气股份有限公司 | A kind of temperature-measuring system of distributed fibers |
| CN111623902A (en) * | 2020-06-05 | 2020-09-04 | 上海交通大学 | Distributed optical fiber Raman temperature sensor based on intensity modulation chirp pulse compression |
| CN113899465A (en) * | 2021-11-11 | 2022-01-07 | 天津津航技术物理研究所 | Optical fiber temperature-sensing fire detection device for fire fighting |
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