CN206311139U - A kind of BOTDR measuring systems based on near-infrared single photon detector - Google Patents
A kind of BOTDR measuring systems based on near-infrared single photon detector Download PDFInfo
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- CN206311139U CN206311139U CN201621393955.9U CN201621393955U CN206311139U CN 206311139 U CN206311139 U CN 206311139U CN 201621393955 U CN201621393955 U CN 201621393955U CN 206311139 U CN206311139 U CN 206311139U
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Abstract
The utility model is related to a kind of BOTDR measuring systems based on near-infrared single photon detector,Including system core control module,The system core control module includes computer module and drives nucleus module,The system core control module side is electrically connected with pulse laser emission module,The pulse laser emission module includes lasing light emitter generation module,Isolator module,Acousto-optic modulation module and Erbium-doped fiber amplifier module,And be electrically connected with successively,Acousto-optic modulation module side is electrically connected with AOM drive modules,By the frequency and pulsewidth that adjust laser pulse,Realize that measurement fiber distance is corresponding with the pulse period,It is set to meet simultaneously near,In,The demand of remote fiber linear measure longimetry,In addition,Realize human-computer interaction function,And the parameters of the adjustment system that can suit measures to local conditions,The repetition rate of such as modulating light pulse,Modulation pulsewidth,Scan period of F P etc.,Whole system is set to realize artificial intelligence functionalization,Modernization.
Description
Technical field
The utility model is related to a kind of BOTDR measuring systems based on near-infrared single photon detector, belongs to fiber distribution
Formula is sensed and faint infrared electro field of detecting.
Background technology
Distributing optical fiber sensing, the back scattering phenomenon of generation is propagated using laser, in communication, remote sensing, boat in a fiber
Many national defence civil areas such as empty space flight and military surveillance have broad application prospects, and distribution type sensing method particularly may be divided into
Three major types, the distributed sensing based on rayleigh scattering, the distributed sensing based on Brillouin scattering, the biography based on Raman scattering
Sense, meets different aspect, the application demand of different certainty of measurement scopes, wherein the distributing optical fiber sensing based on Brillouin scattering
Method, is after optical signal enters optical fiber, the presence of microvibration will to be accompanied by the molecule of fiber optic materials, so as to cause light
Fine internal structure changes, and makes refractive index in periodic distribution, while cause a spontaneous sound field, then in sound field
The inelastic scattering that the incident light wave propagated in the lower optical fiber of effect will be produced, referred to as Brillouin scattering.Using this phenomenon
Distributed sensing technology be referred to as the distributed sensing technology based on Brillouin scattering, generally along fiber distribution temperature or
When stress changes, the frequency shift amount of the brillouin scattering signal in optical fiber will be had influence on, in addition, it will also be to backward cloth
In deep pool scattering light intensity produce influence, in the distributed fiberoptic sensor based on Brillouin scattering, in the incidence end of optical fiber
Input one optical signal of pulse modulated, when optical signal in the communication process of optical fiber by generation after to Rayleigh scattering, cloth
In deep pool scattering, and Raman scattering signal（It is ignored in such a system because Raman signal is weaker）, then detect edge in incidence end
The Rayleigh scattering light of fiber lengths distribution, the strength information and Brillouin's relative phase shift information of Brillouin scattering are realized to light
Measured while fine temperature and strain, because Brillouin scattering has spatial resolution is high, distance sensing is long, certainty of measurement is high etc.
Advantage, its in such as safety monitoring of bridge, tunnel, dam, powerline network, oil-gas pipeline etc. of infrastructure engineering facility and
Very tempting application prospect is shown in fault pre-alarming and assessment.
But, due to Brillouin scattering, its light intensity is very faint, it is difficult to detect so that BOTDR has larger limitation
Property, for example, its measurable distance is shorter, the shortcomings of resolution ratio is not high, in order to improve its measurement range, many scientists start to adopt
Take using the measurement scheme of single-photon detector, but, current single-photon detector can only operate under same frequency substantially,
And if there is current BOTDR system following characteristic to improve certainty of measurement, measurement distance will shorten, if opposite
Want to increase measurement distance, it is necessary to reduce precision as cost；The performance of whole system is so entirely limited, how have been taken
Measure, breaks through this limitation, further the parameter such as measurement distance, resolution ratio of lifting BOTDR, as a great problem, therefore, need
Further to improve.
Utility model content
The technical problems to be solved in the utility model overcomes existing defect, there is provided a kind of based on near-infrared single photon detection
The BOTDR measuring systems of device, the measuring system is combined using single-photon detector with F-P scanning systems, and uses light pulse
Signal, F-P scanning interferometers drive signal and SPD trigger signals, the solution that this three signal is synchronously performed, by adjusting laser
The frequency and pulsewidth of pulse, realize measurement fiber distance it is corresponding with the pulse period, make its simultaneously meet closely, in, remote fiber
The demand of linear measure longimetry, in addition, realizes human-computer interaction function, it is possible to the parameters of adjustment system of suiting measures to local conditions,
Repetition rate, modulation pulsewidth, scan period of F-P of such as modulating light pulse etc., whole system is set to realize artificial intelligence work(
Energyization, modernization, in can effectively solving the problems, such as background technology.
In order to solve the above-mentioned technical problem, the utility model provides following technical scheme：
A kind of BOTDR measuring systems based on near-infrared single photon detector, including system core control module, the system
System kernel control module includes computer module and drives nucleus module, and the system core control module side is electrically connected with arteries and veins
Impulse light emission module, the pulse laser emission module includes lasing light emitter generation module, isolator module, acousto-optic modulation module
With Erbium-doped fiber amplifier module, and it is electrically connected with successively, the acousto-optic modulation module side is electrically connected with AOM drive modules, institute
State system core control module opposite side and be electrically connected with detecting module, the detecting module includes single photon detector module, F-P
Voltage drive module and F-P scanning interferometer modules, and be electrically connected with successively, the Erbium-doped fiber amplifier module and the F-P
Scanning interferometer module is electrically connected with circulator module, and the circulator module side is electrically connected with sense light wire module.
Used as a kind of optimal technical scheme of the present utility model, the driving nucleus module electrically connects with AOM drive modules
Connect.
As a kind of optimal technical scheme of the present utility model, the computer module and the single photon detector module
It is electrically connected with.
As a kind of optimal technical scheme of the present utility model, the driving nucleus module respectively with the single photon detection
Device module, F-P voltages drive module are electrically connected with.
Used as a kind of optimal technical scheme of the present utility model, the circulator module side is electrically connected with sensing light mould
Block.
The utility model beneficial effect：The measuring system is combined using single-photon detector with F-P scanning systems, and is adopted
The solution synchronously performed with light pulse signal, F-P scanning interferometers drive signal and SPD trigger signals, this three signal, passes through
Adjust laser pulse frequency and pulsewidth, realize measurement fiber distance it is corresponding with the pulse period, make its simultaneously meet closely, in,
The demand of remote fiber linear measure longimetry, in addition, realizes human-computer interaction function, it is possible to each of adjustment system of suiting measures to local conditions
Item parameter, repetition rate, modulation pulsewidth, scan period of F-P of such as modulating light pulse etc., realize whole system artificial
Intelligent function, modernization, makes it have larger application prospect in current fiber optic communication field.
Brief description of the drawings
Accompanying drawing is used for providing being further understood to of the present utility model, and constitutes a part for specification, with this practicality
New embodiment is used to explain the utility model together, does not constitute to limitation of the present utility model.
Fig. 1 is a kind of BOTDR measuring system module total figures based on near-infrared single photon detector of the utility model.
Label in figure：1st, system core control module；2nd, computer module；3rd, nucleus module is driven；4th, pulse laser hair
Penetrate module；5th, lasing light emitter generation module；6th, isolator module；7th, acousto-optic modulation module；8th, Erbium-doped fiber amplifier module；9、AOM
Drive module；10th, detecting module；11st, single photon detector module；12nd, F-P voltages drive module；13rd, F-P scanning interferometers
Module；14th, circulator module；15th, sense light wire module.
Specific embodiment
Preferred embodiment of the present utility model is illustrated below in conjunction with accompanying drawing, it will be appreciated that described herein excellent
Select embodiment to be merely to illustrate and explain the utility model, be not used to limit the utility model.
As shown in figure 1, a kind of BOTDR measuring systems based on near-infrared single photon detector, including system core control
Module 1, system core control module 1 includes computer module 2 and drives nucleus module 3, the side of system core control module 1 electricity
Property connection pulse laser emission module 4, pulse laser emission module 4 includes lasing light emitter generation module 5, isolator module 6, acousto-optic
Modulation module 7 and Erbium-doped fiber amplifier module 8, and be electrically connected with successively, the side of acousto-optic modulation module 7 is electrically connected with AOM and drives
Module 9, the opposite side of system core control module 1 is electrically connected with detecting module 10, and detecting module 10 includes single-photon detector mould
Block 11, F-P voltages drive module 12 and F-P scanning interferometers module 13, and be electrically connected with successively, Erbium-doped fiber amplifier module 8
Circulator module 14 is electrically connected with F-P scanning interferometers module 13.
Drive nucleus module 3 to be electrically connected with AOM drive modules 9, being modulated with AOM makes it become pulsed light, calculate
Machine module 2 is electrically connected with single photon detector module 11, and artificial intelligence functionalization is realized by computer module 2, modernization
Nucleus module 3 is driven to be electrically connected with single photon detector module 11, F-P voltages drive module 12 respectively, circulator module 14
Side is electrically connected with sense light wire module 15.
Specifically, produce two path signal first with Kernel driving block, and by control the frequency of laser pulse with
Pulsewidth, realizes that measurement fiber distance is corresponding with the pulse period, and single-photon detector simultaneously is realized in then regulating system time delay
（SPD）Trigger signal is synchronous with laser pulse signal；Accumulative time of measuring then according to detector, it is necessary to systemic resolution
Corresponding F-P scanning voltages drive signal is produced, when so just realizing the spatial resolution of adjustment system, measurement as needed
Between, measurement range cause that whole system reaches the purpose of optimum performance.
The basic procedure of BOTDR system:First, the parameters of kernel control module are set according to measurement demand, including
The parameters such as the frequency of laser pulse, pulsewidth, the voltage range of F-P turntable drivings, sweep time, especially adjust core and drive mould
The time delay of block, carries out SPD trigger signals and return light signal alignment；Then start 1550nm LASER Light Sources and produce continuous laser,
It is set to become pulsed light by being modulated with AOM after isolator, the laser after then modulating can be sent to EDFA and be amplified
（Depending on situation, it is used for detection over long distances）, the pulse laser after amplification is by being coupled into sensor fibre after circulator；It is specific
The rear orientation light of location point is entered in F-P scanning interferometers by the other end of circulator, the frequency spectrum of such rear orientation light
It is separated and；Then the light that F-P cavity is projected is detected by SPD, the avalanche signal that it is produced by it is corresponding amplify, it is whole
After the treatment such as type, modulus, send into kernel control module by serial bus and preserved.
It is above the utility model preferably implementation method, the utility model those skilled in the art can also be to upper
Implementation method is stated to be changed and changed, therefore, the utility model is not limited to above-mentioned specific embodiment, every ability
Field technique personnel made on the basis of the utility model it is any conspicuously improved, replace or modification belong to this practicality
New protection domain.
Claims (5)
1. a kind of BOTDR measuring systems based on near-infrared single photon detector, including system core control module（1）, it is special
Levy and be, the system core control module（1）Including computer module（2）With driving nucleus module（3）, the system core
Control module（1）Side is electrically connected with pulse laser emission module（4）, the pulse laser emission module（4）Including lasing light emitter
Generation module（5）, isolator module（6）, acousto-optic modulation module（7）With Erbium-doped fiber amplifier module（8）, and electrically connect successively
Connect, the acousto-optic modulation module（7）Side is electrically connected with AOM drive modules（9）, the system core control module（1）It is another
Side is electrically connected with detecting module（10）, the detecting module（10）Including single photon detector module（11）, F-P voltages drive mould
Block（12）With F-P scanning interferometer modules（13）, and be electrically connected with successively, the Erbium-doped fiber amplifier module（8）With the F-P
Scanning interferometer module（13）It is electrically connected with circulator module（14）.
2. a kind of BOTDR measuring systems based on near-infrared single photon detector according to claim 1, it is characterised in that：
The driving nucleus module（3）With AOM drive modules（9）It is electrically connected with.
3. a kind of BOTDR measuring systems based on near-infrared single photon detector according to claim 1, it is characterised in that：
The computer module（2）With the single photon detector module（11）It is electrically connected with.
4. a kind of BOTDR measuring systems based on near-infrared single photon detector according to claim 1, it is characterised in that：
The driving nucleus module（3）Respectively with the single photon detector module（11）, F-P voltage drive modules（12）Electrically connect
Connect.
5. a kind of BOTDR measuring systems based on near-infrared single photon detector according to claim 1, it is characterised in that：
The circulator module（14）Side is electrically connected with sense light wire module（15）.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201621393955.9U CN206311139U (en) | 2016-12-19 | 2016-12-19 | A kind of BOTDR measuring systems based on near-infrared single photon detector |
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| CN201621393955.9U CN206311139U (en) | 2016-12-19 | 2016-12-19 | A kind of BOTDR measuring systems based on near-infrared single photon detector |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109066288A (en) * | 2018-05-30 | 2018-12-21 | Oppo广东移动通信有限公司 | Control system, the control method of terminal and laser projecting apparatus of laser projecting apparatus |
| US11183811B2 (en) | 2018-05-30 | 2021-11-23 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Control system and method for laser projector, and terminal |
-
2016
- 2016-12-19 CN CN201621393955.9U patent/CN206311139U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109066288A (en) * | 2018-05-30 | 2018-12-21 | Oppo广东移动通信有限公司 | Control system, the control method of terminal and laser projecting apparatus of laser projecting apparatus |
| US11183811B2 (en) | 2018-05-30 | 2021-11-23 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Control system and method for laser projector, and terminal |
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Effective date of registration: 20180928 Address after: 200237 District 2319, room 69, Lane 1985, Chunshen Road, Minhang District, Shanghai 1 district. Co-patentee after: East China Normal University Patentee after: Shanghai Langyan Optoelectronics Technology Co.,Ltd. Address before: 201104 District 2319, room 69, Lane 1985, Chunshen Road, Minhang District, Shanghai 1 district. Patentee before: Shanghai Langyan Optoelectronics Technology Co.,Ltd. |
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Effective date of registration: 20211018 Address after: Room 4001, building 21, No. 123, Lane 1165, Jindu Road, Minhang District, Shanghai 201100 Patentee after: SHANGHAI LANGYAN OPTOELECTRONICS TECHNOLOGY Co.,Ltd. Patentee after: Chongqing Research Institute of East China Normal University Address before: 200237 District 2319, room 69, Lane 1985, Chunshen Road, Minhang District, Shanghai 1 district. Patentee before: SHANGHAI LANGYAN OPTOELECTRONICS TECHNOLOGY Co.,Ltd. Patentee before: EAST CHINA NORMAL University |
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Effective date of registration: 20230515 Address after: No. 205, 2nd Floor, No. 91 Jihuayuan East Road, Dazhulin Street, Liangjiang New District, Chongqing, 400000 Patentee after: Chongqing Huapu Scientific Instrument Co.,Ltd. Address before: Room 4001, building 21, No. 123, Lane 1165, Jindu Road, Minhang District, Shanghai 201100 Patentee before: SHANGHAI LANGYAN OPTOELECTRONICS TECHNOLOGY Co.,Ltd. Patentee before: Chongqing Research Institute of East China Normal University |
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