CN206074150U - A kind of temperature monitoring system based on railway tunnel communications optical cable - Google Patents
A kind of temperature monitoring system based on railway tunnel communications optical cable Download PDFInfo
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- CN206074150U CN206074150U CN201620921644.9U CN201620921644U CN206074150U CN 206074150 U CN206074150 U CN 206074150U CN 201620921644 U CN201620921644 U CN 201620921644U CN 206074150 U CN206074150 U CN 206074150U
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- electric channel
- smooth electric
- monitoring system
- optical cable
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Abstract
This utility model provides a kind of temperature monitoring system based on railway tunnel communications optical cable.The temperature monitoring system based on railway tunnel communications optical cable by the use of tunnel optical fiber as temperature sensor, and including：Lasing light emitter, bonder and the temperature-measuring optical fiber set gradually along laser propagation direction, and the first smooth electric channel, the second smooth electric channel for separation amplification is carried out to the scatter echo that the bonder feeds back and the signal acquisition process unit for carrying out photoelectric signal collection and process that laser is amplified process is modulated for what is sent to the lasing light emitter；The first smooth electric channel is connected with the lasing light emitter, and the second smooth electric channel is connected with the bonder, and the signal acquisition process unit is connected with the described first smooth electric channel and the second smooth electric channel respectively.
Description
Technical field
This utility model is related to a kind of temperature monitoring system based on railway tunnel communications optical cable.
Background technology
In order to ensure traffic safety of the train in tunnel, need to be monitored all technical in tunnel, for example temperature
Degree monitoring, fire monitoring etc..But, by taking temperature detection as an example, measurement is mainly still manually gone in the monitoring to tunnel temperature index,
For example periodically send someone scene infrared ray or laser thermodetector carries out telemeasurement, the method for this manual measurement is mainly deposited
In problems with：
First, monitoring cycle is long, and many local fever phenomenons cannot find in time and process；
2nd, detect and analyze and judge by manually carrying out, thus detect be affected by human factors with analysis result it is larger；
3rd, infrared ray or laser thermodetector price often costly, by capital effect, its popularization and promote difficulty compared with
Greatly.
Therefore, it is necessary to propose it is a kind of by the use of tunnel optical fiber as temperature sensor based on railway tunnel communications optical cable
Temperature monitoring system.
Utility model content
The purpose of this utility model be provide it is a kind of by the use of tunnel optical fiber as temperature sensor based on railway tunnel
The temperature monitoring system of communications optical cable.
The technical solution of the utility model is as follows：A kind of temperature monitoring system based on railway tunnel communications optical cable utilizes tunnel
Road optical fiber as temperature sensor, and including：Lasing light emitter, bonder and the temperature-measuring optical fiber set gradually along laser propagation direction,
And for the lasing light emitter is sent modulation laser be amplified the first smooth electric channel of process, for the coupling
The scatter echo of device feedback carries out the second smooth electric channel for separating amplification and the signal for carrying out photoelectric signal collection and process
Acquisition process unit；The first smooth electric channel is connected with the lasing light emitter, the second smooth electric channel and the bonder
It is connected, the signal acquisition process unit is connected with the described first smooth electric channel and the second smooth electric channel respectively.
Preferably, the lasing light emitter includes the signal generator being connected with each other and laser instrument, the laser instrument respectively with institute
State bonder and the first smooth electric channel connection.
Preferably, the laser instrument is highpowerpulse semiconductor laser.
Preferably, the described first smooth electric channel includes the first photodiode being electrically connected to each other and the first amplifier, institute
State the first photodiode to be connected with the lasing light emitter, and receive the modulation laser that the lasing light emitter sends；Described first amplifies
Device is electrically connected with the signal acquisition process unit, and sends the first photosignal to the signal acquisition process unit.
Preferably, the described second smooth electric channel includes wave filter, the second photodiode and second for being sequentially connected setting
Amplifier, the wave filter are connected with the bonder, and receive the scatter echo of the bonder feedback, and described second puts
Big device is electrically connected with the signal acquisition process unit, and sends the second photosignal to the signal acquisition process unit.
Preferably, the signal acquisition process unit includes data acquisition module and the computer being electrically connected to each other, described
Data acquisition module is electrically connected with the described first smooth electric channel and the second smooth electric channel respectively.
Preferably, also include for confirming to need the single-chip microcomputer of outgoing carrier signal frequency, the single-chip microcomputer respectively with institute
Signal acquisition process unit and lasing light emitter electrical connection are stated, and it is true according to the signal of telecommunication of signal acquisition process unit offer
The frequency of carrier signal recognized needed for the modulation laser that the lasing light emitter sends.
Preferably, the bonder is Y type directional couplers.
The beneficial effects of the utility model are：The temperature monitoring system based on railway tunnel communications optical cable passes through
The beginning modulation frequency that frequency sampling is spaced half is equal to using size, with the frequency sampling interval accurate reproduction reality of limited size
The anti-Stokess Raman reflection space distribution on border, so as to realize the algorithm for power modulation type light frequency domain of high spatial resolution, long range
Raman's mirror based fiber optica temperature sensor.
Description of the drawings
Fig. 1 is the structural frames of the temperature monitoring system based on railway tunnel communications optical cable that this utility model embodiment is provided
Figure；
Fig. 2 be shown in Fig. 1 in based on railway tunnel communications optical cable temperature monitoring system coupler structure schematic diagram.
Specific embodiment
In order that the purpose of this utility model, technical scheme and advantage become more apparent, below in conjunction with accompanying drawing and enforcement
Example, is further elaborated to this utility model.It should be appreciated that specific embodiment described herein is only to explain
This utility model, is not used to limit this utility model.
The description of specific distinct unless the context otherwise, the element and component in this utility model, quantity both can be with single
In the form of, it is also possible in the form of multiple, this utility model is not defined to this.It is appreciated that institute herein
The term "and/or" for using is related to and covers one of associated Listed Items or one or more of any and be possible to
Combination.
Fig. 1 is referred to, is the temperature monitoring system based on railway tunnel communications optical cable that this utility model embodiment is provided
Structured flowchart.The temperature monitoring system 100 based on railway tunnel communications optical cable is by the use of tunnel optical fiber as temperature sensing
Device, and including the lasing light emitter 10, bonder 20 and temperature-measuring optical fiber 30 set gradually along laser propagation direction, and for described
Lasing light emitter 10 send modulation laser be amplified the first smooth electric channel 40 of process, for dissipating to 20 feedback of the bonder
Being emitted back towards ripple carries out separating the second smooth electric channel 50 of amplification, the signal acquisition process list for carrying out photoelectric signal collection and process
Unit 60 and for confirming to need the single-chip microcomputer 70 of outgoing carrier signal frequency.In the present embodiment, the temperature-measuring optical fiber 30 is tunnel
The optical fiber not used in communications optical cable in road.
Wherein, the described first smooth electric channel 40 is connected with the lasing light emitter 10, the second smooth electric channel 50 with it is described
Bonder 20 is connected, and the signal acquisition process unit 60 is logical with the described first smooth electric channel 40 and second photoelectricity respectively
Road 50 is connected, and the single-chip microcomputer 70 is electrically connected with the signal acquisition process unit 60 and the lasing light emitter 10 respectively.
The lasing light emitter 10 includes the signal generator 11 being connected with each other and laser instrument 12, the laser instrument 12 respectively with institute
State bonder 20 and the first smooth electric channel 40 connects.Specifically, the signal generator 11 is that highest output frequency is reachable
The AD9859 signal generators of 200MHz, the laser instrument 12 is highpowerpulse semiconductor laser, and its major parameter is：In
Cardiac wave is long：905nm；Repetition rate (Prf)：5kHz；Peak point current (Ip)：4A；Peak power (Po)：10W；Laser instrument and optical fiber
Coupling efficiency：65%.
In the present embodiment, the signal generator 11 is electrically connected with the single-chip microcomputer 70, and according to the single-chip microcomputer 70
Instruction output respective frequencies periodic signal, such as sine wave signal, square wave signal, triangular wave signal etc.；The week
Phase signal obtains the modulation laser for carrying the periodic signal after the laser instrument 12.And, the laser instrument 12 is produced
Laser is modulated described in raw two-way, the modulation laser enters the described first smooth electric channel 40 all the way, described in another road, modulate laser
The bonder 20 is entered through into the temperature-measuring optical fiber 30.
In the present embodiment, the bonder 20 is Y type directional couplers.Specifically, Fig. 2, the bonder are referred to
20 selection principle is as follows：The 1-2 ends of the bonder 20 are the smaller the better with the loss at 2-3 ends, and 1-3 ends are isolated with 2-1 ends
Degree is the bigger the better.And, into optical fiber is pulsed light, and scatter return be quasi-continuous light, so the isolation at the 2-1 ends
Degree need to be made it is larger, such that it is able to improve signal intensity.
Specifically, the bonder 20 receives the scatter echo of the feedback of the temperature-measuring optical fiber 30, such as described temperature-measuring optical fiber
The 30 anti-Stokess Raman's backscattering optical echos for producing, and, the bonder 20 is also by the scatter echo sending value
The second smooth electric channel 50, is carried out at Signal separator and amplification by 50 pairs of scatter echos of the described second smooth electric channel
Reason.
The first smooth electric channel 40 includes the first photodiode 41 being electrically connected to each other and the first amplifier 42, described
First photodiode 41 is connected with the lasing light emitter 10, and receives the modulation laser that the lasing light emitter 10 sends；Described first
Amplifier 42 is electrically connected with the signal acquisition process unit 60, and sends the first photoelectricity to the signal acquisition process unit 60
Signal.Preferably, first photodiode 41 is avalanche photodide.
Specifically, first photodiode 41 is connected with 10 laser instrument 12 of the lasing light emitter, receives the laser instrument
The modulation laser of 12 transmittings, and process is amplified to the modulation laser.
The second smooth electric channel 50 includes being sequentially connected the wave filter 51 of setting, the second photodiode 52 and second and puts
Big device 53, the wave filter 51 are connected with the bonder 20, and receive the scatter echo of the feedback of the bonder 20, described
Second amplifier 53 is electrically connected with the signal acquisition process unit 60, and sends second to the signal acquisition process unit 60
Photosignal.Preferably, second photodiode 52 is avalanche photodide.
Specifically, the wave filter 51 of the described second smooth electric channel 50 receives the scatter echo of the offer of the bonder 20, and
The anti-Stokess Raman's backscattering optical signal with temperature information in the scatter echo is isolated, and will be isolated
The anti-Stokess Raman backscattering optical signal is sent to the Raman passage of second photodiode 52, most after Jing institutes
State the second amplifier 53 and be amplified process.
The signal acquisition process unit 60 includes the data acquisition module 61 being electrically connected to each other and computer 62, the number
Electrically connected with the described first smooth electric channel 40 and the second smooth electric channel 50 according to acquisition module 61 respectively.In the present embodiment,
The data acquisition module 61 is CS series data capture cards.
Specifically, the data acquisition module 61 receives 50 points of the described first smooth electric channel 40 and the second smooth electric channel
First photosignal not sent and second photosignal, and from the laser power waveform for measuring and anti-this support
Gram this Raman's reflected signal waveform calculates its amplitude and phase place respectively, and constructs corresponding to anti-Stokess Raman's reflected signal
Frequency response function, is accordingly calculated, and then generates two paths of signals, gives the single-chip microcomputer 70 all the way, it is determined that should next time
The signal frequency of the transmission；Another road is sent to the computer 62, and 62 pairs of data for collecting of the computer are processed, most
The spatial distribution of temperature is obtained afterwards and is shown with figure or form.
The single-chip microcomputer 70 receives the signal of the transmission of the data acquisition module 61, so as to confirm to need the carrier wave letter of output
Number frequency, then sends instruction to the signal generator 11 of the lasing light emitter 10, after the signal generator 11 receives the instruction,
The periodic signal of output respective frequencies.
Compared to prior art, what this utility model was provided is passed through based on the temperature monitoring system of railway tunnel communications optical cable
The beginning modulation frequency that frequency sampling is spaced half is equal to using size, with the frequency sampling interval accurate reproduction reality of limited size
The anti-Stokess Raman reflection space distribution on border, so as to realize the algorithm for power modulation type light frequency domain of high spatial resolution, long range
Raman's mirror based fiber optica temperature sensor.
It is obvious to a person skilled in the art that this utility model is not limited to the details of above-mentioned one exemplary embodiment, and
And in the case of without departing substantially from spirit or essential attributes of the present utility model, can realize that this practicality is new in other specific forms
Type.Therefore, no matter from the point of view of which point, embodiment all should be regarded as exemplary, and is nonrestrictive, this practicality is new
The scope of type is by claims rather than described above is limited, it is intended that the equivalency fallen in claim is contained
All changes in justice and scope are included in this utility model.Any reference in claim should not be considered as restriction
Involved claim.
Moreover, it will be appreciated that although this specification is been described by according to embodiment, not each embodiment is only
Comprising an independent technical scheme, this narrating mode of description is only that for clarity, those skilled in the art should
When using description as an entirety, the technical scheme in each embodiment can also Jing it is appropriately combined, form people in the art
The understandable other embodiment of member.
Claims (8)
1. a kind of temperature monitoring system based on railway tunnel communications optical cable, it is characterised in that by the use of tunnel optical fiber as temperature
Sensor, and including：Lasing light emitter, bonder and the temperature-measuring optical fiber set gradually along laser propagation direction, and for described
The modulation laser that lasing light emitter sends is amplified the first smooth electric channel of process, the scatter echo for feeding back to the bonder
Carry out separating the second smooth electric channel of amplification and the signal acquisition process unit for carrying out photoelectric signal collection and process；
The first smooth electric channel is connected with the lasing light emitter, and the second smooth electric channel is connected with the bonder, institute
State signal acquisition process unit to be connected with the described first smooth electric channel and the second smooth electric channel respectively.
2. the temperature monitoring system based on railway tunnel communications optical cable according to claim 1, it is characterised in that described to swash
Light source includes the signal generator being connected with each other and laser instrument, the laser instrument respectively with the bonder and first photoelectricity
Passage connects.
3. the temperature monitoring system based on railway tunnel communications optical cable according to claim 2, it is characterised in that described to swash
Light device is highpowerpulse semiconductor laser.
4. the temperature monitoring system based on railway tunnel communications optical cable according to claim 1, it is characterised in that described
One smooth electric channel includes the first photodiode being electrically connected to each other and the first amplifier, first photodiode with it is described
Lasing light emitter connects, and receives the modulation laser that the lasing light emitter sends；First amplifier and the signal acquisition process list
Unit's electrical connection, and the first photosignal is sent to the signal acquisition process unit.
5. the temperature monitoring system based on railway tunnel communications optical cable according to claim 1, it is characterised in that described
Two smooth electric channels include wave filter, the second photodiode and the second amplifier for being sequentially connected setting, the wave filter and institute
State bonder to be connected, and receive the scatter echo of bonder feedback, at second amplifier and the signals collecting
Reason unit electrical connection, and the second photosignal is sent to the signal acquisition process unit.
6. the temperature monitoring system based on railway tunnel communications optical cable according to claim 1, it is characterised in that the letter
Number acquisition process unit includes data acquisition module and the computer being electrically connected to each other, the data acquisition module respectively with it is described
First smooth electric channel and the second smooth electric channel electrical connection.
7. the temperature monitoring system based on railway tunnel communications optical cable according to claim 1, it is characterised in that also include
For confirming to need the single-chip microcomputer of outgoing carrier signal frequency, the single-chip microcomputer respectively with the signal acquisition process unit and institute
Lasing light emitter electrical connection is stated, and the signal of telecommunication provided according to the signal acquisition process unit confirms the modulation that the lasing light emitter sends
Frequency of carrier signal needed for laser.
8. the temperature monitoring system based on railway tunnel communications optical cable according to claim 1, it is characterised in that the coupling
Clutch is Y type directional couplers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620921644.9U CN206074150U (en) | 2016-08-23 | 2016-08-23 | A kind of temperature monitoring system based on railway tunnel communications optical cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620921644.9U CN206074150U (en) | 2016-08-23 | 2016-08-23 | A kind of temperature monitoring system based on railway tunnel communications optical cable |
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| Publication Number | Publication Date |
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| CN206074150U true CN206074150U (en) | 2017-04-05 |
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| CN201620921644.9U Expired - Fee Related CN206074150U (en) | 2016-08-23 | 2016-08-23 | A kind of temperature monitoring system based on railway tunnel communications optical cable |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106441627A (en) * | 2016-08-23 | 2017-02-22 | 南京铁道职业技术学院 | System for monitoring temperature based on railway tunnel communication optical cable |
-
2016
- 2016-08-23 CN CN201620921644.9U patent/CN206074150U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106441627A (en) * | 2016-08-23 | 2017-02-22 | 南京铁道职业技术学院 | System for monitoring temperature based on railway tunnel communication optical cable |
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