CN206192493U - High accuracy distributed optical fiber vibrating device based on PCIE capture card - Google Patents
High accuracy distributed optical fiber vibrating device based on PCIE capture card Download PDFInfo
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- CN206192493U CN206192493U CN201621288400.8U CN201621288400U CN206192493U CN 206192493 U CN206192493 U CN 206192493U CN 201621288400 U CN201621288400 U CN 201621288400U CN 206192493 U CN206192493 U CN 206192493U
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- pcie
- optical fiber
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- light
- wave filter
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Abstract
The utility model relates to a high accuracy distributed optical fiber vibrating device based on PCIE capture card, its characterized in that is equipped with super narrow linewidth lasers ware, acoustic optic modem, optical fiber amplifier, circulator, raman amplifier, wave filter, photoelectric detector, PCIE high speed data acquisition card, treater, wherein super narrow linewidth lasers ware is connected with acoustic optic modem, acoustic optic modem makes into pulse light with the continuous light, pulse light is connected with the first port of circulator through optical fiber amplifier, the second port and the raman amplifier of circulator are connected, the light signal of raman amplifier output gets into sensing fiber, circulator third port is connected with the wave filter, the output of wave filter is connected with photoelectric detector, the scattered light is sent into PCIE high speed data acquisition card after photoelectric detector converts the signal of telecommunication to, data pass to the treater through the PCIE interface and handle, the utility model discloses when guaranteeing long distance, high spatial resolution, can also realize high positioning accuracy and response speed.
Description
Technical field
The utility model is related to technical field of optical fiber sensing, specifically a kind of high accuracy based on PCIE capture cards point
Cloth fiber-optic vibration device.
Background technology
, with whole piece optical fiber as sensing element, using the scattering phenomenon in optical fiber, it is right to be capable of achieving for distributed optical fiber sensing system
The continuously distributed formula measurement of measured physical quantity on sensor fibre.When optical fiber is stressed effect, the length of optical fiber（Strain effect
Should）, fibre core diameter（Poisson effect）, fiber core refractive index（Photoelastic effect）Will change, these changes can all cause in optical fiber
The change of phase of light wave.Distributed optical fiber sensing system with whole piece optical fiber as sensing element, using the scattering phenomenon in optical fiber, can
Realize the continuously distributed formula measurement to measured physical quantity on sensor fibre.
Distributed optical fiber vibration sensing system uses φ-OTDR technique, is injected into just highly coherent in optical fiber, is
The result of interference of the backward Rayleigh scattering light that light is produced in a fiber is detected in system output pulse width region.By launching arteries and veins
The time delay washed off and receive backward Rayleigh scattering light, φ-OTDR can position the disturbance in optical fiber somewhere.When certain portion of optical fiber
When position is disturbed, due to elasto-optical effect, the refractive index at this will change, so as to cause the phase change of light wave at this,
Due to interference effect, the change of light phase will cause backward Rayleigh scattering light light intensity to change, after the two neighboring moment
Subtract each other the disturbance that can detect with the outer bound pair optical fiber of positioning to Rayleigh scattering curve.
The Changing Pattern of the interference signal in collection optical fiber is the foundation for judging external interference behavior, information content duration
Length and the speed of transmission directly affect backstage parsing, therefore accurate, accurately analytic signal is known so as to enter row mode
Not, it is necessary to a high speed, real time signal aquisition device, traditional optical fiber vibration sensing system is generally adopted using general on the market
Truck, so causes optical fiber vibration sensing system to generally there are following shortcoming：（1）Spatial resolution and positioning precision are poor；（2）Adopt
Truck only carries out data transmission, there is no data-handling capacity, it is necessary to will gather data transfer to PC ends treatment, data transfer pressure
Power is big, and process time is long, causes alarm time slow.
The content of the invention
The utility model is directed to deficiency of the prior art, proposes that one kind can realize transmission range 50km, positioning precision
The high accuracy distributed optical fiber vibration device based on PCIE capture cards of 10m, response time 1s.
The utility model can be reached by following measures：
A kind of high accuracy distributed optical fiber vibration device based on PCIE capture cards, it is characterised in that be provided with super-narrow line width and swash
Light device, acousto-optic modulator, fiber amplifier, circulator, raman amplifier, wave filter, photodetector, PCIE high-speed datas are adopted
Truck, processor, wherein the super-narrow line width laser is connected with acousto-optic modulator, acousto-optic modulator is by continuous light modulation into arteries and veins
Wash off, pulsed light is connected by fiber amplifier with the first port of circulator, the second port and raman amplifier of circulator
Connection, raman amplifier output optical signal enter sensor fibre, the port of circulator the 3rd is connected with wave filter, wave filter it is defeated
Go out end to be connected with photodetector, scattering light is admitted to PCIE high-speed data acquisitions after being converted into electric signal through photodetector
Card, data pass to processor and are processed through PCIE interfaces.
The centre wavelength of super-narrow line width laser described in the utility model is 1550nm, and line width is 2kHz.
PCIE high-speed data acquisition cards described in the utility model are provided with ADC, FPGA, DDRIII, PCIE interface.
The function that PCIE high-speed data acquisition cards described in the utility model are realized include analog-to-digital conversion, data it is laterally cumulative,
Vibration data signal transacting, alert data transmission etc..
Framework of the present utility model can simultaneously measure frequency displacement and changed power, its workflow：The system is using super
Narrow linewidth laser makees light source, and the continuous light that super-narrow line width laser sends is modulated into pulsed light, pulse by acousto-optic modulator
After fiber amplifier, circulator enter raman amplifier amplification, into sensor fibre, rear orientation light returns through ring to light
Shape device, wave filter are converted into electric signal into PCIE high-speed data acquisition cards through photodetector, and capture card is tired out data
Plus, treatment, most alert data passes to processor and is processed through PCIE interfaces at last, and processor is according to alarm rule to alarm number
According to further being processed, display alarm information.
Compared with prior art, advantage of the present utility model：Using PCIE high-speed data acquisition cards, the device is according to distribution
The characteristics of formula optical fiber vibration sensing system, carries out targetedly data and laterally adds up, signal transacting, without big data quantity is uploaded
Treatment, reduces processing load, improves the response time.Therefore, the utility model ensure over long distances, high spatial resolution it is same
When, moreover it is possible to realize positioning precision and response speed high.
Brief description of the drawings：
Accompanying drawing 1 is structural representation of the present utility model.
Reference：Super-narrow line width laser 1, acousto-optic modulator 2, fiber amplifier 3, circulator 4, raman amplifier 5,
Wave filter 6, photodetector 7, PCIE high-speed data acquisition cards 8, processor 9, sensor fibre 10.
Specific embodiment：
The utility model is described in more detail below in conjunction with the accompanying drawings.
As shown in drawings, the utility model proposes a kind of high accuracy distributed optical fiber vibration dress based on PCIE capture cards
Put, including super-narrow line width laser 1, acousto-optic modulator 2, fiber amplifier 3, circulator 4, raman amplifier 5, wave filter 6, light
Electric explorer 7, PCIE high-speed data acquisition cards 8, processor 9, sensor fibre 10 are constituted；Wherein super-narrow line width laser 1 and sound
Optical modulator 2 is connected, and by continuous light modulation into pulsed light, pulsed light connects by the first port of fiber amplifier 3 and circulator 4
Connect, the second port of circulator is connected with raman amplifier 5, into sensor fibre 10, the port of circulator 4 the 3rd and wave filter 6
Connection, scattering light is converted into electric signal into PCIE high-speed data acquisition cards 8 through photodetector 7, and capture card carries out data
Cumulative, treatment, most alert data passes to processor 9 and is processed through PCIE interfaces at last.
In the utility model, to realize that extra long distance is measured, super-narrow line width laser 1, line width<2KHz, service band is
1550nm。
In the utility model, PCIE high-speed data acquisition cards are PCIE interface capture cards, and transmission rate is up to 2.5Gb/s.
In the utility model, the ADC sample frequencys of PCIE high-speed data acquisition cards are 100M, and main control chip is FPGA, can
Realize that hardware is laterally cumulative, with it, will not reduce spatial resolution while improving positioning precision, 100M is equivalent to adopting
At intervals of 1m between sampling point, it is worth by the point one of horizontal average out to 10, represents 10m spatial resolutions, position error is less than
10m。
In the utility model, PCIE high-speed data acquisition cards, its main control chip FPGA can realize signal processing algorithm, will be big
Data volume is converted directly into alert data, reduces and the volume of transmitted data between PC, improves alarm response speed, it is ensured that during response
Between be less than 1s.
In a word, what embodiment of the present utility model was announced is its preferably implementation method, but is not limited to this.This area
Those of ordinary skill understands spirit of the present utility model easily according to above-described embodiment, and makes different amplifications and change, but
Without departing from spirit of the present utility model, all within protection domain of the present utility model.
Claims (3)
1. a kind of high accuracy distributed optical fiber vibration device based on PCIE capture cards, it is characterised in that be provided with super-narrow line width laser
Device, acousto-optic modulator, fiber amplifier, circulator, raman amplifier, wave filter, photodetector, PCIE high-speed data acquisitions
Card, processor, wherein the super-narrow line width laser is connected with acousto-optic modulator, acousto-optic modulator is by continuous light modulation into pulse
Light, pulsed light is connected by fiber amplifier with the first port of circulator, and second port and the raman amplifier of circulator connect
Connect, the optical signal of raman amplifier output enters sensor fibre, and the port of circulator the 3rd is connected with wave filter, the output of wave filter
End is connected with photodetector, and scattering light is admitted to PCIE high-speed data acquisitions after being converted into electric signal through photodetector
Card, data pass to processor and are processed through PCIE interfaces.
2. a kind of high accuracy distributed optical fiber vibration device based on PCIE capture cards according to claim 1, its feature
It is to be provided with the centre wavelength of the super-narrow line width laser for 1550nm, line width is 2kHz.
3. a kind of high accuracy distributed optical fiber vibration device based on PCIE capture cards according to claim 1, its feature
It is that described PCIE high-speed data acquisition cards are provided with ADC, FPGA, DDRIII, PCIE interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621288400.8U CN206192493U (en) | 2016-11-29 | 2016-11-29 | High accuracy distributed optical fiber vibrating device based on PCIE capture card |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621288400.8U CN206192493U (en) | 2016-11-29 | 2016-11-29 | High accuracy distributed optical fiber vibrating device based on PCIE capture card |
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| Publication Number | Publication Date |
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| CN206192493U true CN206192493U (en) | 2017-05-24 |
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| CN201621288400.8U Active CN206192493U (en) | 2016-11-29 | 2016-11-29 | High accuracy distributed optical fiber vibrating device based on PCIE capture card |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108489597A (en) * | 2018-04-08 | 2018-09-04 | 盐城工学院 | A kind of acoustic detector and method based on hollow-core photonic crystal fiber |
-
2016
- 2016-11-29 CN CN201621288400.8U patent/CN206192493U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108489597A (en) * | 2018-04-08 | 2018-09-04 | 盐城工学院 | A kind of acoustic detector and method based on hollow-core photonic crystal fiber |
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