CN206804147U - Inexpensive positioning optical fiber vibration sensing device - Google Patents
Inexpensive positioning optical fiber vibration sensing device Download PDFInfo
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- CN206804147U CN206804147U CN201720429922.3U CN201720429922U CN206804147U CN 206804147 U CN206804147 U CN 206804147U CN 201720429922 U CN201720429922 U CN 201720429922U CN 206804147 U CN206804147 U CN 206804147U
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- 239000013307 optical fiber Substances 0.000 title claims abstract description 19
- 230000003287 optical effect Effects 0.000 claims abstract description 33
- 239000000835 fiber Substances 0.000 claims abstract description 19
- 238000012545 processing Methods 0.000 claims abstract description 14
- 238000005070 sampling Methods 0.000 claims abstract description 6
- 210000001367 artery Anatomy 0.000 claims description 3
- 210000003462 vein Anatomy 0.000 claims description 3
- 238000010276 construction Methods 0.000 abstract description 4
- 238000001514 detection method Methods 0.000 abstract description 4
- 238000012544 monitoring process Methods 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 4
- 239000004065 semiconductor Substances 0.000 description 3
- 239000004744 fabric Substances 0.000 description 2
- 230000001953 sensory effect Effects 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000004807 localization Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 238000000253 optical time-domain reflectometry Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000002210 silicon-based material Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
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- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
Technical problem to be solved in the utility model is to realize a kind of multiple affair location type distributed optical fiber vibration sensing device simple in construction, inexpensive.The output end of laser is connected with the input of pulse optical modulator, the output end of pulse optical modulator and the input of image intensifer connect, the output end of image intensifer and the input of optoisolator connect, the output end of optoisolator and one of input of coupler connect, two output ends of coupler connect two-way sensor fibre respectively, another input of coupler and the input of photodetector are connected, and the output end of photodetector is connected with digital sampling and processing.Two output ends of pulse driver are connected with pulse optical modulator and data acquisition processing module respectively.Monitoring to vibration event is realized by the back scattering interference of light in two-way sensor fibre, the positioning to vibration event is realized by optical time domain reflection technology.On the premise of detection range and positioning precision is ensured, the cost of system is greatly reduced.
Description
Technical field
Sensory field of optic fibre is the utility model is related to, more particularly to a kind of distribution type fiber-optic of inexpensive multiple affair positioning shakes
Dynamic sensory field.
Background technology
Optical fibre vibration sensor has that big simple in construction, investigative range, high sensitivity, response frequency be wide, electromagnetism interference
The features such as ability is strong, disguised strong, environmental requirement is low.It can be used for the real-time monitoring in large scale industry place, and some danger
Real-time monitoring, security protection and the alert process in place.Therefore, research location type distributed optical fiber sensing system be one very
There are application prospect and the problem of practical significance.
At present, the optical fiber vibration sensing system that positioning can be achieved mainly has two classes：One kind is based on double M-Z principle of interferences
Optical fiber vibration sensing system.The system can be realized and detected over long distances, and can position the position that vibration thing occurs, but based on double M-
The vibration signal localization method of Z principles can only position individual event, can not realize and multiple events are carried out while positioned.It is another kind of
It is to be based on optical time domain reflection（OTDR）The distributed optical fiber vibration sensing system of principle.The system has accurate positioning, operation letter
Single, the characteristics of detection range is long, but the system is the self-interference effect based on narrow linewidth optical signal rear orientation light in a fiber
Vibrating sensing should be realized, system needs to use super-narrow line width laser and acousto-optic modulator, and the cost of system is very high, Zhi Neng
High-end place application.
The content of the invention
Technical problem to be solved in the utility model is to realize a kind of multiple affair location type point simple in construction, inexpensive
Cloth optical fiber vibration sensing device, on the premise of detection range and positioning precision is ensured, greatly reduce the cost of system.
The technical problems to be solved in the utility model is realized by following technical proposals：
A kind of inexpensive positioning optical fiber vibration sensing device of the utility model includes laser, pulse optical modulator, arteries and veins
Rush driver, image intensifer, optoisolator, coupler, sensor fibre, photodetector, digital sampling and processing.
The laser uses semiconductor laser, and it is the continuous light that 1310nm spectral widths are 40nm to send centre wavelength
Signal.
Described pulse optical modulator uses electrooptic modulator, by the continuous optical signal modulation that semiconductor laser is sent into
10ns-200ns pulsed optical signals.
Described pulse driver is realized using XC3S50AN type high speeds fpga chip, exports broad-adjustable electric pulse letter
Number, for driving pulse optical modulator.
Described image intensifer uses EDFA Erbium-Doped Fiber Amplifier, realizes and pulsed optical signals are amplified.
Described optoisolator uses centre wavelength to prevent rear orientation light from returning for 1310nm optical fibre light isolator
Device is caused to damage into image intensifer and semiconductor laser.
The coupler uses fiber coupler of the centre wavelength for 1310nm, and it is defeated that the optical signal of injection is divided into two-way
Go out.
Described sensor fibre uses G652 general single mode fibers, and it is 0.35dB/km@1310nm that parameter, which is lost, in it,
0.20dB/km@1550nm。
Described photodetector uses PIN-type silicon materials photodetector, my 800-1700nm of its detecting light spectrum scope.
Described data acquisition process unit is realized using 100MHz data collecting cards processing industry processing computer.
To achieve these goals, the technical solution adopted in the utility model is：A kind of inexpensive multiple affair location type
Distributed optical fiber vibration sensing device.The continuous optical signal of laser output by pulse light modulator modulates into pulsed optical signals,
It is input to again after image intensifer amplifies by optoisolator on one of port of coupler.It is input in coupler
Pulsed optical signals are coupled device and are divided into two-way light, are injected separately into two-way sensor fibre.Back scattering in two-way sensor fibre
The optical signal returned is returned on coupler, is interfered in coupler.Back scattering optical signal after interference is by coupling
Another input port of device, which is input in photodetector, is converted into electric signal.The electric signal of photodetector output is through at a high speed
AD capture cards are converted into being input in processor after data signal being handled to obtain vibration signal and its positional information.Pulse is driven
Dynamic device produces broad-adjustable electric impulse signal, pulse of the driving pulse optical modulator by continuous optical signal modulation into one fixed width
Optical signal, while output sync pulse signal gives AD capture cards, driving AD collections are synchronous to carry out data acquisition.
The utility model has the advantage of can realize to multiple vibration events while position, and with structure letter
Singly, the features such as cost is low.
Brief description of the drawings
Fig. 1 is inexpensive positioning optical fiber vibration sensing device structure chart.
Embodiment
Technical problem to be solved in the utility model is to realize a kind of multiple affair location type point simple in construction, inexpensive
Cloth optical fiber vibration sensing device, on the premise of detection range and positioning precision is ensured, greatly reduce the cost of system.
The utility model low cost positioning optical fiber vibration sensing device is as shown in figure 1, the device includes laser 1, arteries and veins
Wash modulator 2, image intensifer 3, optoisolator 4, coupler 5, sensor fibre 6, sensor fibre 7, photodetector 8, data off
Acquisition processing module 9, pulse driver 10.The continuous optical signal that laser 1 exports is modulated into pulsed light by pulse optical modulator 2
Signal, then be input to after the amplification of image intensifer 3 by optoisolator 4 on one of input port of coupler 5.Input
Pulsed optical signals into coupler are coupled device and are divided into two-way, are injected separately into sensor fibre 6 and sensor fibre 7.Sensing
The optical signal that back scattering is returned in optical fiber 6 and sensor fibre 7 returns again to be convergeed on coupler 5, is done in coupler 5
Relate to.Back scattering optical signal after interference is input in photodetector 8 by another input port of coupler 5 to be converted into
Electric signal.The electric signal that photodetector 8 exports is input to progress analog-to-digital conversion and processing in digital sampling and processing 9 and obtained
Vibration signal and its positional information.Pulse driver 10 produces broad-adjustable electric impulse signal, and driving pulse optical modulator 2 will
Continuous optical signal modulation is into the pulsed optical signals of one fixed width, while output sync pulse signal is to digital sampling and processing,
Driving data acquisition processing module synchronously carries out data acquisition and processing (DAP).
The utility model is exemplarily described above in conjunction with accompanying drawing, it is clear that the utility model specific implementation not by
The limitation of aforesaid way, as long as employing changing for the various unsubstantialities that methodology and technical scheme of the present utility model are carried out
Enter, or it is not improved by it is of the present utility model design and technical scheme directly apply to other occasions, in the utility model
Protection domain within.
Claims (3)
1. inexpensive positioning optical fiber vibration sensing device, it is characterised in that：
The output end of laser is connected with the input of pulse optical modulator, the output end of pulse optical modulator and image intensifer
Input connects, and the input of the output end of image intensifer and optoisolator connects, the output end of optoisolator and coupler
One of input connection, two output ends of coupler connect two-way sensor fibre, another input of coupler respectively
It is connected with the input of photodetector, the output end of photodetector is connected with digital sampling and processing；Pulse driver
Two output ends be connected respectively with pulse optical modulator and data acquisition processing module.
2. inexpensive positioning optical fiber vibration sensing device according to claim 1, it is characterised in that：
Described coupler uses power-division ratios as 1:1 fiber coupler；One of input of coupler and light every
Connected from device, another input of coupler is connected with photodetector；Two output ends of coupler connect two-way respectively
Sensor fibre.
3. inexpensive positioning optical fiber vibration sensing device according to claim 1, it is characterised in that：
Described pulse driver is realized using high speed fpga chip, broad-adjustable electric impulse signal is exported, for driving arteries and veins
Wash modulator, while output sync pulse signal off；The output of pulse signal interface of pulse driver connects with pulse optical modulator
Connect, the synchronizing signal output interface of pulse driver is connected with digital sampling and processing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720429922.3U CN206804147U (en) | 2017-04-24 | 2017-04-24 | Inexpensive positioning optical fiber vibration sensing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720429922.3U CN206804147U (en) | 2017-04-24 | 2017-04-24 | Inexpensive positioning optical fiber vibration sensing device |
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| Publication Number | Publication Date |
|---|---|
| CN206804147U true CN206804147U (en) | 2017-12-26 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720429922.3U Expired - Fee Related CN206804147U (en) | 2017-04-24 | 2017-04-24 | Inexpensive positioning optical fiber vibration sensing device |
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| Country | Link |
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| CN (1) | CN206804147U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106908139A (en) * | 2017-04-24 | 2017-06-30 | 安徽师范大学 | A kind of inexpensive multiple affair location type distributed optical fiber vibration sensing device |
-
2017
- 2017-04-24 CN CN201720429922.3U patent/CN206804147U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106908139A (en) * | 2017-04-24 | 2017-06-30 | 安徽师范大学 | A kind of inexpensive multiple affair location type distributed optical fiber vibration sensing device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171226 Termination date: 20190424 |