CN105222816A - Based on the multiparameter distributed optical fiber sensing system of modulating pulse and multiple scattering - Google Patents
Based on the multiparameter distributed optical fiber sensing system of modulating pulse and multiple scattering Download PDFInfo
- Publication number
- CN105222816A CN105222816A CN201510747665.3A CN201510747665A CN105222816A CN 105222816 A CN105222816 A CN 105222816A CN 201510747665 A CN201510747665 A CN 201510747665A CN 105222816 A CN105222816 A CN 105222816A
- Authority
- CN
- China
- Prior art keywords
- coupling mechanism
- input end
- output terminal
- awg
- waveform generator
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000013307 optical fiber Substances 0.000 title claims abstract description 32
- 230000008878 coupling Effects 0.000 claims abstract description 103
- 238000010168 coupling process Methods 0.000 claims abstract description 103
- 238000005859 coupling reaction Methods 0.000 claims abstract description 103
- 230000007246 mechanism Effects 0.000 claims abstract description 103
- 239000000835 fiber Substances 0.000 claims abstract description 64
- 238000001514 detection method Methods 0.000 claims abstract description 35
- 235000008331 Pinus X rigitaeda Nutrition 0.000 claims abstract description 19
- 235000011613 Pinus brutia Nutrition 0.000 claims abstract description 19
- 241000018646 Pinus brutia Species 0.000 claims abstract description 19
- 230000010287 polarization Effects 0.000 claims abstract description 16
- 238000012545 processing Methods 0.000 claims abstract description 13
- 238000005070 sampling Methods 0.000 claims description 19
- 238000013481 data capture Methods 0.000 claims description 13
- 239000000203 mixture Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 4
- 230000032683 aging Effects 0.000 abstract description 3
- 230000035559 beat frequency Effects 0.000 description 10
- 230000008859 change Effects 0.000 description 10
- 238000012546 transfer Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 4
- 238000012544 monitoring process Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 230000003321 amplification Effects 0.000 description 2
- 230000036541 health Effects 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000003595 spectral effect Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000012631 diagnostic technique Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
Abstract
Based on a multiparameter distributed optical fiber sensing system for modulating pulse and multiple scattering, by single-frequency laser, AWG (Arbitrary Waveform Generator), acousto-optic modulator, scrambler, Polarization Controller, photoswitch, data collecting card, signal processing unit, tightly overlap sensor fibre, pine cover sensor fibre, Brillouin scattering optical fiber, two Erbium-Doped Fiber Amplifier (EDFA)s, two circulators, two two balanced detector, three isolators and five coupling mechanisms form; Advantageous Effects of the present invention is: provide a kind of new distributed optical fiber sensing system, this system possesses the function of vibration detection, temperature detection and strain detecting simultaneously, system cost is lower, can make to realize real-time intercommunication between different pieces of information, be conducive to the comprehensive utilization of system to data, improve the accuracy and ageing of location.
Description
Technical field
The present invention relates to a kind of Distributed Optical Fiber Sensing Techniques, particularly relate to a kind of multiparameter distributed optical fiber sensing system based on modulating pulse and multiple scattering.
Background technology
In the health monitoring, diagnostic techniques of the Important Project such as heavy construction structure, Aero-Space, petrochemical complex, electric system and infrastructure, Distributed Optical Fiber Sensing Techniques, because possessing the characteristics such as small and exquisite, high durable, the absolute measurement of sensitive element and distributed monitoring, has and progressively replaces the trend that electrical sensor becomes the first-selected sensitive element of sensing health monitoring.
In prior art, application distribution optical fiber sensing technology carries out vibrating, the monitoring of temperature and strain three kinds of information time, need to adopt three separate cover systems to monitor, this not only adds system cost, and make the shared and fusion of different pieces of information between system become very difficult, be unfavorable for the comprehensive utilization of data.
Summary of the invention
For the problem in background technology, the present invention proposes a kind of multiparameter distributed optical fiber sensing system based on modulating pulse and multiple scattering, its innovation is: described multiparameter distributed optical fiber sensing system by single-frequency laser, AWG (Arbitrary Waveform Generator), acousto-optic modulator, scrambler, Polarization Controller, photoswitch, data collecting card, signal processing unit, tightly overlap sensor fibre, pine cover sensor fibre, Brillouin scattering optical fiber, two Erbium-Doped Fiber Amplifier (EDFA)s, two circulators, two two balanced detector, three isolators and five coupling mechanisms form; Wherein, the first coupling mechanism is 1 × 3 coupling mechanism, and the second coupling mechanism is 1 × 2 coupling mechanism, and the 3rd coupling mechanism is 2 × 2 coupling mechanisms, and the 4th coupling mechanism is 1 × 2 coupling mechanism, and the 5th coupling mechanism is 2 × 2 coupling mechanisms; Described photoswitch is 1 × 2 photoswitch;
The output terminal of described single-frequency laser is connected with the input end of the first coupling mechanism, first output terminal of the first coupling mechanism is connected with the first input end of the 3rd coupling mechanism, second output terminal of the first coupling mechanism is connected with the input end of acousto-optic modulator, and the 3rd output terminal of the first coupling mechanism is connected with the input end of the second Erbium-Doped Fiber Amplifier (EDFA);
The output terminal of acousto-optic modulator is connected with the input end of the first Erbium-Doped Fiber Amplifier (EDFA), the output terminal of the first Erbium-Doped Fiber Amplifier (EDFA) is connected with the input end of scrambler, the output terminal of scrambler is connected with the input end of the first circulator, the multiplexing end of transmitting-receiving of the first circulator is connected with the boundling end of photoswitch, and the output terminal of the first circulator is connected with the input end of the second coupling mechanism; First divergent ends of photoswitch is connected with the one end tightly overlapping sensor fibre, the other end of tight cover sensor fibre is connected with the input end of the first isolator, one end that second divergent ends and the pine of photoswitch overlap sensor fibre is connected, and the other end of pine cover sensor fibre is connected with the input end of the second isolator;
First output terminal of the second coupling mechanism is connected with the second input end of the 3rd coupling mechanism, and two output terminals of the 3rd coupling mechanism are connected with two input ends of first pair of balanced detector; Second output terminal of the second coupling mechanism is connected with the first input end of the 5th coupling mechanism;
The output terminal of the second Erbium-Doped Fiber Amplifier (EDFA) is connected with the input end of the second circulator, the multiplexing end of transmitting-receiving of the second circulator is connected with the input end of Polarization Controller, the output terminal of the second circulator is connected with the input end of the 3rd isolator, and the output terminal of the 3rd isolator is connected with the input end of the 4th coupling mechanism; The output terminal of Polarization Controller is connected with one end of Brillouin scattering optical fiber, and the other end of Brillouin scattering optical fiber is connected with the first output terminal of the 4th coupling mechanism; Second output terminal of the 4th coupling mechanism is connected with the second input end of the 5th coupling mechanism; Two output terminals of the 5th coupling mechanism are connected with two input ends of second pair of balanced detector;
The output terminal of first pair of balanced detector is connected with the first input end of data collecting card, and the output terminal of second pair of balanced detector is connected with the second input end of data collecting card; The output terminal of data collecting card is connected with the input end of signal processing unit;
The modulation signal output terminal of AWG (Arbitrary Waveform Generator) is connected with the modulation signal input end of acousto-optic modulator; First control signal output terminal of AWG (Arbitrary Waveform Generator) is connected with the control part of photoswitch, and the second control signal output terminal of AWG (Arbitrary Waveform Generator) is connected with the control part of data collecting card;
Described AWG (Arbitrary Waveform Generator) can control acousto-optic modulator and export two kinds of sensed light signal, two kinds of sensed light signal are pulsed light, the two frequency but amplitude identical with dutycycle varies in size, wherein, the sensed light signal that amplitude is larger is designated as the first detection light, and the sensed light signal that amplitude is less is designated as the second detection light;
When carrying out vibration detection, AWG (Arbitrary Waveform Generator) controls acousto-optic modulator and exports the first detection light, and meanwhile, AWG (Arbitrary Waveform Generator) controls photoswitch gating and tightly overlaps sensor fibre, meanwhile, the first input end of AWG (Arbitrary Waveform Generator) control data capture card carries out sampling operation;
When carrying out temperature detection, AWG (Arbitrary Waveform Generator) controls acousto-optic modulator and exports the second detection light, and meanwhile, AWG (Arbitrary Waveform Generator) controls photoswitch gating pine cover sensor fibre, meanwhile, the second input end of AWG (Arbitrary Waveform Generator) control data capture card carries out sampling operation;
When carrying out strain detecting, AWG (Arbitrary Waveform Generator) controls acousto-optic modulator and exports the second detection light, and meanwhile, AWG (Arbitrary Waveform Generator) controls photoswitch gating and tightly overlaps sensor fibre, meanwhile, the second input end of AWG (Arbitrary Waveform Generator) control data capture card carries out sampling operation.
Principle of the present invention is: after system building is good by the present invention program, by the control action of AWG (Arbitrary Waveform Generator), two kinds of sensed light signal can optionally export to by system tightly overlaps in sensor fibre or pine cover sensor fibre and is sampled by the corresponding input end on data collecting card; Those skilled in the art should be clear, the Brillouin intensity that the pulsed light that amplitude is less inspires is more weak, nonlinear noise is less, Rayleigh scattering is the major part of its scattered light, adopt the existing vibrating sensing principle based on Rayleigh beacon, just can detect positional information and the frequency information of vibration; The Brillouin intensity that the pulsed light that amplitude is larger inspires is stronger, Brillouin scattering is the major part of its scattered light, adopt the existing temperature detection principle based on Brillouin scattering and strain detecting principle, just can detect temperature information and strain variation information;
After adopting the present invention program, single cover distributed optical fiber sensing system is just allowed to have possessed vibration detection, temperature detection and strain detecting three kinds of functions, what not only greatly reduce distributed optical fiber sensing system builds cost, and save space, improve the integrated level of system, can make to realize real-time intercommunication between different pieces of information, be conducive to the comprehensive utilization of system to data, improve the accuracy and ageing of location.
Concrete principle of the present invention is: single-frequency laser, as LASER Light Source, provides the laser beam of continous-stable to the first coupling mechanism, and laser beam is divided into three road light by the first coupling mechanism:
First via light directly transfers to the 3rd coupling mechanism place as the reference light of Rayleigh scattering beat frequency;
Second road light is after the second Erbium-Doped Fiber Amplifier (EDFA) amplifies, be injected in Polarization Controller by the multiplexing end of the transmitting-receiving of the second circulator, after Polarization Controller modulation, light signal to enter in Brillouin scattering optical fiber and inspires the Brillouin scattering (light signal of fl transmission has just ended after entering the 3rd isolator by the 4th coupling mechanism) of reverse transfers, the Brillouin scattering inspired in Brillouin scattering optical fiber back through Polarization Controller after outwards export from the output terminal of the second circulator again, the Brillouin scattering exported from the output terminal of the second circulator passes through the 3rd isolator afterwards to the 4th coupling mechanism, the Brillouin scattering that 3rd isolator transmits is divided into two-way by the 4th coupling mechanism, wherein a road Brillouin scattering transfers to again in Brillouin scattering optical fiber and forms loop and play circulation amplify effect, another road Brillouin scattering exports the 5th coupling mechanism place to as the reference light of Brillouin scattering beat frequency,
3rd road optical transport is in acousto-optic modulator, the modulation signal that acousto-optic modulator exports according to AWG (Arbitrary Waveform Generator) is modulated input light, thus form corresponding sensed light signal, then, the sensed light signal modulated transfers in the first Erbium-Doped Fiber Amplifier (EDFA) and carries out amplification process by acousto-optic modulator, sensed light signal after amplification is injected into again in scrambler carries out processing that (scrambler is for reducing the degree of polarization of sensed light signal, to reduce the polarization noise in follow-up scattered light), then, sensed light signal is come in photoswitch by the multiplexing end of the transmitting-receiving of the first circulator, photoswitch is under the control of AWG (Arbitrary Waveform Generator), just sensed light signal is directed into (i.e. tight cover sensor fibre or pine cover sensor fibre) in corresponding sensor fibre, subsequently, sensed light signal just inspires corresponding rear orientation light in sensor fibre, outwards transmission is also lost by isolator (i.e. the first isolator or the second isolator) for the sensed light signal of fl transmission, rear orientation light, to be got back to again in the first circulator by photoswitch and transfer to the second coupling mechanism from the output terminal of the first circulator, rear orientation light is divided into two-way by the second coupling mechanism, wherein a road rear orientation light transfer to the 3rd coupling mechanism place and with the reference light generation beat frequency interference of Rayleigh scattering beat frequency, another road rear orientation light transfer to the 5th coupling mechanism place and with the reference light generation beat frequency interference of Brillouin scattering beat frequency, for vibration detection, when certain one in temperature detection and strain detecting detects, in the two place's beat frequency interferences occurred in the 3rd coupling mechanism and the 5th coupling mechanism, one is only had to have Clinical significance of detecting, therefore, for vibration, when temperature and a certain detailed programs in straining detect, one in two input ends of AWG (Arbitrary Waveform Generator) only on control data capture card carries out sampling operation, after getting sampled signal, data collecting card just exports sampled signal to signal processing unit and processes, thus get corresponding vibration information, temperature information or strain information,
Concrete Cleaning Principle is:
During vibration detection, AWG (Arbitrary Waveform Generator) controls acousto-optic modulator and exports the first detection light, and meanwhile, AWG (Arbitrary Waveform Generator) controls photoswitch gating and tightly overlaps sensor fibre, and meanwhile, the first input end of AWG (Arbitrary Waveform Generator) control data capture card carries out sampling operation; When extraneous vibration is applied on tight cover sensor fibre, the phase place of the backward Rayleigh scattering light in pulsed light width range will be caused to change, and then cause backward Rayleigh scattering light and corresponding reference light also to change in the light intensity of the 3rd coupling mechanism place beat frequency interference, moving average and mobile difference processing are carried out to the signal obtained that multiple sampling period samples, just can obtain the positional information vibrated; The information of taking out the relevant position of vibration position corresponding point in Different sampling period is in line, and obtains the time-domain information of vibration position, then does Nonuniform fast Fourier transform to the time-domain information of vibration position, the just passable vibration frequency information obtaining oscillation point.
During temperature detection, AWG (Arbitrary Waveform Generator) controls acousto-optic modulator and exports the second detection light, and meanwhile, AWG (Arbitrary Waveform Generator) controls photoswitch gating pine cover sensor fibre, and meanwhile, the second input end of AWG (Arbitrary Waveform Generator) control data capture card carries out sampling operation, due to the light frequency of Brillouin scattering and temperature variation linear, when ambient temperature change is applied on pine cover sensor fibre, the optical frequency shift of backward Brillouin scattering light in pulsed light width range will be caused to change, the light frequency of Brillouin scattering behind the 5th coupling mechanism place and corresponding reference light beat frequency interference also can present linear change along with the change of temperature, according to certain space resolution subdivisions, Fourier transform is carried out to the Brillouin's beat signal collected in the sampling period, Lorentz fit is carried out to the spectral line of Fourier transform, take out center frequency value, the center frequency obtained Different sampling period is again averaged and difference processing, just can obtain the temperature information of pine cover sensor fibre.
During strain detecting, AWG (Arbitrary Waveform Generator) controls acousto-optic modulator and exports the second detection light, and meanwhile, AWG (Arbitrary Waveform Generator) controls photoswitch gating and tightly overlaps sensor fibre, and meanwhile, the second input end of AWG (Arbitrary Waveform Generator) control data capture card carries out sampling operation, because the light frequency of backward spontaneous brillouin scattering is linear with strain, when extraneous effects of strain is to tight overlapping on sensor fibre, the optical frequency shift of backward Brillouin scattering light in pulsed light width range will be caused to change, the light frequency of Brillouin scattering behind the 5th coupling mechanism place and corresponding reference light beat frequency interference will along with the change strained linear change, according to certain space resolution subdivisions, Fourier transform is carried out to the Brillouin's beat signal collected in the sampling period, Lorentz fit is carried out to the spectral line of Fourier transform, take out center frequency value, again the center frequency that Different sampling period obtains only is averaged and difference processing, just can obtain the change information of the strain of long-distance sensing optical fiber.
Aforesaid three kinds of Cleaning Principle are prior art, implement, therefore repeated as front for the ease of those skilled in the art; Due to Cleaning Principle not emphasis of the present invention, therefore the present invention has only done to briefly introduce, and if any part not to the utmost, please refer to existing theory.
Advantageous Effects of the present invention is: provide a kind of new distributed optical fiber sensing system, this system possesses the function of vibration detection, temperature detection and strain detecting simultaneously, system cost is lower, can make to realize real-time intercommunication between different pieces of information, be conducive to the comprehensive utilization of system to data, improve the accuracy and ageing of location.
Accompanying drawing explanation
Fig. 1, principle schematic of the present invention (two dotted lines in figure represent AWG (Arbitrary Waveform Generator) and the electric control circuit between photoswitch and data collecting card);
In figure each mark corresponding to title be respectively: single-frequency laser 1, AWG (Arbitrary Waveform Generator) 2, acousto-optic modulator 3, scrambler 4, Polarization Controller 5, photoswitch 6, data collecting card 7, signal processing unit 8, tight cover sensor fibre 9, pine cover sensor fibre 10, Brillouin scattering optical fiber 11, first coupling mechanism 12-1, second coupling mechanism 12-2, 3rd coupling mechanism 12-3, 4th coupling mechanism 12-4, 5th coupling mechanism 12-5, first Erbium-Doped Fiber Amplifier (EDFA) 13-1, second Erbium-Doped Fiber Amplifier (EDFA) 13-2, first circulator 14-1, second circulator 14-2, first isolator 15-1, second isolator 15-2, 3rd isolator 15-3, first couple of balanced detector 16-1, second couple of balanced detector 16-2.
Embodiment
Based on a multiparameter distributed optical fiber sensing system for modulating pulse and multiple scattering, its structure is: described multiparameter distributed optical fiber sensing system is made up of single-frequency laser 1, AWG (Arbitrary Waveform Generator) 2, acousto-optic modulator 3, scrambler 4, Polarization Controller 5, photoswitch 6, data collecting card 7, signal processing unit 8, tight cover sensor fibre 9, pine cover sensor fibre 10, Brillouin scattering optical fiber 11, two Erbium-Doped Fiber Amplifier (EDFA)s, two circulators, two two balanced detector, three isolators and five coupling mechanisms; Wherein, the first coupling mechanism 12-1 is 1 × 3 coupling mechanism, and the second coupling mechanism 12-2 is 1 × 2 coupling mechanism, and the 3rd coupling mechanism 12-3 is 2 × 2 coupling mechanisms, and the 4th coupling mechanism 12-4 is 1 × 2 coupling mechanism, and the 5th coupling mechanism 12-5 is 2 × 2 coupling mechanisms; Described photoswitch 6 is 1 × 2 photoswitch;
The output terminal of described single-frequency laser 1 is connected with the input end of the first coupling mechanism 12-1, first output terminal of the first coupling mechanism 12-1 is connected with the first input end of the 3rd coupling mechanism 12-3, second output terminal of the first coupling mechanism 12-1 is connected with the input end of acousto-optic modulator 3, and the 3rd output terminal of the first coupling mechanism 12-1 is connected with the input end of the second Erbium-Doped Fiber Amplifier (EDFA) 13-2;
The output terminal of acousto-optic modulator 3 is connected with the input end of the first Erbium-Doped Fiber Amplifier (EDFA) 13-1, the output terminal of the first Erbium-Doped Fiber Amplifier (EDFA) 13-1 is connected with the input end of scrambler 4, the output terminal of scrambler 4 is connected with the input end of the first circulator 14-1, the multiplexing end of transmitting-receiving of the first circulator 14-1 is connected with the boundling end of photoswitch 6, and the output terminal of the first circulator 14-1 is connected with the input end of the second coupling mechanism 12-2; First divergent ends of photoswitch 6 is connected with the one end tightly overlapping sensor fibre 9, the other end of tight cover sensor fibre 9 is connected with the input end of the first isolator 15-1, one end that second divergent ends and the pine of photoswitch 6 overlap sensor fibre 10 is connected, and the other end of pine cover sensor fibre 10 is connected with the input end of the second isolator 15-2;
First output terminal of the second coupling mechanism 12-2 is connected with second input end of the 3rd coupling mechanism 12-3, and two output terminals of the 3rd coupling mechanism 12-3 are connected with two input ends of first couple of balanced detector 16-1; Second output terminal of the second coupling mechanism 12-2 is connected with the first input end of the 5th coupling mechanism 12-5;
The output terminal of the second Erbium-Doped Fiber Amplifier (EDFA) 13-2 is connected with the input end of the second circulator 14-2, the multiplexing end of transmitting-receiving of the second circulator 14-2 is connected with the input end of Polarization Controller 5, the output terminal of the second circulator 14-2 is connected with the input end of the 3rd isolator 15-3, and the output terminal of the 3rd isolator 15-3 is connected with the input end of the 4th coupling mechanism 12-4; The output terminal of Polarization Controller (5) is connected with one end of Brillouin scattering optical fiber 11, and the other end of Brillouin scattering optical fiber 11 is connected with first output terminal of the 4th coupling mechanism 12-4; Second output terminal of the 4th coupling mechanism 12-4 is connected with second input end of the 5th coupling mechanism 12-5; Two output terminals of the 5th coupling mechanism 12-5 are connected with two input ends of second couple of balanced detector 16-2;
The output terminal of first couple of balanced detector 16-1 is connected with the first input end of data collecting card 7, and the output terminal of second couple of balanced detector 16-2 is connected with the second input end of data collecting card 7; The output terminal of data collecting card 7 is connected with the input end of signal processing unit 8;
The modulation signal output terminal of AWG (Arbitrary Waveform Generator) 2 is connected with the modulation signal input end of acousto-optic modulator 3; First control signal output terminal of AWG (Arbitrary Waveform Generator) 2 is connected with the control part of photoswitch 6, and the second control signal output terminal of AWG (Arbitrary Waveform Generator) 2 is connected with the control part of data collecting card 7;
Described AWG (Arbitrary Waveform Generator) 2 can control acousto-optic modulator 3 and export two kinds of sensed light signal, two kinds of sensed light signal are pulsed light, the two frequency but amplitude identical with dutycycle varies in size, wherein, the sensed light signal that amplitude is larger is designated as the first detection light, and the sensed light signal that amplitude is less is designated as the second detection light;
When carrying out vibration detection, AWG (Arbitrary Waveform Generator) 2 controls acousto-optic modulator 3 and exports the first detection light, and meanwhile, AWG (Arbitrary Waveform Generator) 2 controls photoswitch 6 gating and tightly overlaps sensor fibre 9, meanwhile, the first input end of AWG (Arbitrary Waveform Generator) 2 control data capture card 7 carries out sampling operation;
When carrying out temperature detection, AWG (Arbitrary Waveform Generator) 2 controls acousto-optic modulator 3 and exports the second detection light, and meanwhile, AWG (Arbitrary Waveform Generator) 2 controls photoswitch 6 gating pine cover sensor fibre 10, meanwhile, the second input end of AWG (Arbitrary Waveform Generator) 2 control data capture card 7 carries out sampling operation;
When carrying out strain detecting, AWG (Arbitrary Waveform Generator) 2 controls acousto-optic modulator 3 and exports the second detection light, and meanwhile, AWG (Arbitrary Waveform Generator) 2 controls photoswitch 6 gating and tightly overlaps sensor fibre 9, meanwhile, the second input end of AWG (Arbitrary Waveform Generator) 2 control data capture card 7 carries out sampling operation.
Claims (1)
1. the multiparameter distributed optical fiber sensing system based on modulating pulse and multiple scattering, it is characterized in that: described multiparameter distributed optical fiber sensing system is by single-frequency laser (1), AWG (Arbitrary Waveform Generator) (2), acousto-optic modulator (3), scrambler (4), Polarization Controller (5), photoswitch (6), data collecting card (7), signal processing unit (8), tight cover sensor fibre (9), pine cover sensor fibre (10), Brillouin scattering optical fiber (11), two Erbium-Doped Fiber Amplifier (EDFA)s, two circulators, two two balanced detector, three isolators and five coupling mechanism compositions, wherein, first coupling mechanism (12-1) is 1 × 3 coupling mechanism, and the second coupling mechanism (12-2) is 1 × 2 coupling mechanism, and the 3rd coupling mechanism (12-3) is 2 × 2 coupling mechanisms, 4th coupling mechanism (12-4) is 1 × 2 coupling mechanism, and the 5th coupling mechanism (12-5) is 2 × 2 coupling mechanisms, described photoswitch (6) is 1 × 2 photoswitch,
The output terminal of described single-frequency laser (1) is connected with the input end of the first coupling mechanism (12-1), first output terminal of the first coupling mechanism (12-1) is connected with the first input end of the 3rd coupling mechanism (12-3), second output terminal of the first coupling mechanism (12-1) is connected with the input end of acousto-optic modulator (3), and the 3rd output terminal of the first coupling mechanism (12-1) is connected with the input end of the second Erbium-Doped Fiber Amplifier (EDFA) (13-2);
The output terminal of acousto-optic modulator (3) is connected with the input end of the first Erbium-Doped Fiber Amplifier (EDFA) (13-1), the output terminal of the first Erbium-Doped Fiber Amplifier (EDFA) (13-1) is connected with the input end of scrambler (4), the output terminal of scrambler (4) is connected with the input end of the first circulator (14-1), the multiplexing end of transmitting-receiving of the first circulator (14-1) is connected with the boundling end of photoswitch (6), and the output terminal of the first circulator (14-1) is connected with the input end of the second coupling mechanism (12-2); First divergent ends of photoswitch (6) is connected with the one end tightly overlapping sensor fibre (9), the other end of tight cover sensor fibre (9) is connected with the input end of the first isolator (15-1), one end that second divergent ends and the pine of photoswitch (6) overlap sensor fibre (10) is connected, and the other end of pine cover sensor fibre (10) is connected with the input end of the second isolator (15-2);
First output terminal of the second coupling mechanism (12-2) is connected with the second input end of the 3rd coupling mechanism (12-3), and two output terminals of the 3rd coupling mechanism (12-3) are connected with two input ends of first pair of balanced detector (16-1); Second output terminal of the second coupling mechanism (12-2) is connected with the first input end of the 5th coupling mechanism (12-5);
The output terminal of the second Erbium-Doped Fiber Amplifier (EDFA) (13-2) is connected with the input end of the second circulator (14-2), the multiplexing end of transmitting-receiving of the second circulator (14-2) is connected with the input end of Polarization Controller (5), the output terminal of the second circulator (14-2) is connected with the input end of the 3rd isolator (15-3), and the output terminal of the 3rd isolator (15-3) is connected with the input end of the 4th coupling mechanism (12-4); The output terminal of Polarization Controller (5) is connected with one end of Brillouin scattering optical fiber (11), and the other end of Brillouin scattering optical fiber (11) is connected with the first output terminal of the 4th coupling mechanism (12-4); Second output terminal of the 4th coupling mechanism (12-4) is connected with the second input end of the 5th coupling mechanism (12-5); Two output terminals of the 5th coupling mechanism (12-5) are connected with two input ends of second pair of balanced detector (16-2);
The output terminal of first pair of balanced detector (16-1) is connected with the first input end of data collecting card (7), and the output terminal of second pair of balanced detector (16-2) is connected with the second input end of data collecting card (7); The output terminal of data collecting card (7) is connected with the input end of signal processing unit (8);
The modulation signal output terminal of AWG (Arbitrary Waveform Generator) (2) is connected with the modulation signal input end of acousto-optic modulator (3); First control signal output terminal of AWG (Arbitrary Waveform Generator) (2) is connected with the control part of photoswitch (6), and the second control signal output terminal of AWG (Arbitrary Waveform Generator) (2) is connected with the control part of data collecting card (7);
Described AWG (Arbitrary Waveform Generator) (2) can control acousto-optic modulator (3) and export two kinds of sensed light signal, two kinds of sensed light signal are pulsed light, the two frequency but amplitude identical with dutycycle varies in size, wherein, the sensed light signal that amplitude is larger is designated as the first detection light, and the sensed light signal that amplitude is less is designated as the second detection light;
When carrying out vibration detection, AWG (Arbitrary Waveform Generator) (2) controls acousto-optic modulator (3) and exports the first detection light, simultaneously, AWG (Arbitrary Waveform Generator) (2) controls photoswitch (6) gating and tightly overlaps sensor fibre (9), meanwhile, the first input end of AWG (Arbitrary Waveform Generator) (2) control data capture card (7) carries out sampling operation;
When carrying out temperature detection, AWG (Arbitrary Waveform Generator) (2) controls acousto-optic modulator (3) and exports the second detection light, simultaneously, AWG (Arbitrary Waveform Generator) (2) controls photoswitch (6) gating pine cover sensor fibre (10), meanwhile, the second input end of AWG (Arbitrary Waveform Generator) (2) control data capture card (7) carries out sampling operation;
When carrying out strain detecting, AWG (Arbitrary Waveform Generator) (2) controls acousto-optic modulator (3) and exports the second detection light, simultaneously, AWG (Arbitrary Waveform Generator) (2) controls photoswitch (6) gating and tightly overlaps sensor fibre (9), meanwhile, the second input end of AWG (Arbitrary Waveform Generator) (2) control data capture card (7) carries out sampling operation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510747665.3A CN105222816B (en) | 2015-11-06 | 2015-11-06 | Multi-parameter distributed optical fiber sensing system based on modulation pulse and multiple scattering |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510747665.3A CN105222816B (en) | 2015-11-06 | 2015-11-06 | Multi-parameter distributed optical fiber sensing system based on modulation pulse and multiple scattering |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105222816A true CN105222816A (en) | 2016-01-06 |
| CN105222816B CN105222816B (en) | 2017-10-20 |
Family
ID=54991900
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510747665.3A Active CN105222816B (en) | 2015-11-06 | 2015-11-06 | Multi-parameter distributed optical fiber sensing system based on modulation pulse and multiple scattering |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105222816B (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105547459A (en) * | 2016-01-18 | 2016-05-04 | 重庆大学 | Sampling control method for distributed-type fiber vibration sensing system |
| CN106124087A (en) * | 2016-08-18 | 2016-11-16 | 盐城工学院 | A kind of temperature-detecting device being wirelessly transferred based on ZigBee and method |
| CN106289337A (en) * | 2016-08-17 | 2017-01-04 | 重庆大学 | Multiparameter distributed optical fiber sensing system |
| CN107036734A (en) * | 2017-05-17 | 2017-08-11 | 中国地质大学（武汉） | A kind of fully distributed fiber temperature or the method for sensing and sensor of strain |
| CN107238412A (en) * | 2017-06-26 | 2017-10-10 | 鞍山睿科光电技术有限公司 | It is a kind of while monitoring vibration, stress, the distributed fiberoptic sensor of temperature |
| CN108375344A (en) * | 2018-02-08 | 2018-08-07 | 成都蓝炬科技有限公司 | The measuring system and method for multiparameter light fiber sensor are predicted based on machine intelligence |
| CN110553674A (en) * | 2018-05-30 | 2019-12-10 | 华为技术有限公司 | Measuring method and measuring device |
| CN111678456A (en) * | 2020-08-14 | 2020-09-18 | 武汉昊衡科技有限公司 | OFDR device for simultaneously measuring temperature and strain and measuring method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102147236A (en) * | 2011-03-23 | 2011-08-10 | 南京大学 | Fully distributed optical fiber strain and vibration sensing method and sensor |
| CN102226703A (en) * | 2011-03-29 | 2011-10-26 | 宁波诺驰光电科技发展有限公司 | Distributed fiber multi-parameter sensor and multi-parameter measuring method |
| CN102607621A (en) * | 2012-03-29 | 2012-07-25 | 中国科学院上海光学精密机械研究所 | Distributed optical fiber Brillouin sensing device and method thereof for detecting temperature and strain synchronously |
| CN102759371A (en) * | 2012-07-19 | 2012-10-31 | 南京大学 | COTDR (coherent detection based optical time-domain reflectometry) fused long-distance coherent detection brilouin optical time-domain analyzer |
| CN103597328A (en) * | 2011-07-27 | 2014-02-19 | 奥姆尼森股份公司 | A sensor and method for sensing |
-
2015
- 2015-11-06 CN CN201510747665.3A patent/CN105222816B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102147236A (en) * | 2011-03-23 | 2011-08-10 | 南京大学 | Fully distributed optical fiber strain and vibration sensing method and sensor |
| CN102226703A (en) * | 2011-03-29 | 2011-10-26 | 宁波诺驰光电科技发展有限公司 | Distributed fiber multi-parameter sensor and multi-parameter measuring method |
| CN103597328A (en) * | 2011-07-27 | 2014-02-19 | 奥姆尼森股份公司 | A sensor and method for sensing |
| CN102607621A (en) * | 2012-03-29 | 2012-07-25 | 中国科学院上海光学精密机械研究所 | Distributed optical fiber Brillouin sensing device and method thereof for detecting temperature and strain synchronously |
| CN102759371A (en) * | 2012-07-19 | 2012-10-31 | 南京大学 | COTDR (coherent detection based optical time-domain reflectometry) fused long-distance coherent detection brilouin optical time-domain analyzer |
Non-Patent Citations (2)
| Title |
|---|
| 宋牟平: "微波电光调制的布里渊散射分布式光纤传感技术", 《光学学报》 * |
| 朱燕: "分布式光纤振动传感技术及发展动态", 《激光与红外》 * |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105547459A (en) * | 2016-01-18 | 2016-05-04 | 重庆大学 | Sampling control method for distributed-type fiber vibration sensing system |
| CN106289337A (en) * | 2016-08-17 | 2017-01-04 | 重庆大学 | Multiparameter distributed optical fiber sensing system |
| CN106289337B (en) * | 2016-08-17 | 2018-07-31 | 重庆大学 | Multi-parameter distributed optical fiber sensing system |
| CN106124087A (en) * | 2016-08-18 | 2016-11-16 | 盐城工学院 | A kind of temperature-detecting device being wirelessly transferred based on ZigBee and method |
| CN106124087B (en) * | 2016-08-18 | 2019-03-22 | 盐城工学院 | A kind of temperature-detecting device and method based on ZigBee wireless transmission |
| CN107036734B (en) * | 2017-05-17 | 2023-01-03 | 中国地质大学（武汉） | Sensing method and sensor for temperature or strain of fully-distributed optical fiber |
| CN107036734A (en) * | 2017-05-17 | 2017-08-11 | 中国地质大学（武汉） | A kind of fully distributed fiber temperature or the method for sensing and sensor of strain |
| CN107238412A (en) * | 2017-06-26 | 2017-10-10 | 鞍山睿科光电技术有限公司 | It is a kind of while monitoring vibration, stress, the distributed fiberoptic sensor of temperature |
| CN107238412B (en) * | 2017-06-26 | 2019-07-05 | 鞍山睿科光电技术有限公司 | A kind of while monitoring vibration, stress, temperature distributed fiberoptic sensor |
| CN108375344A (en) * | 2018-02-08 | 2018-08-07 | 成都蓝炬科技有限公司 | The measuring system and method for multiparameter light fiber sensor are predicted based on machine intelligence |
| CN108375344B (en) * | 2018-02-08 | 2020-11-27 | 成都蓝炬科技有限公司 | Measuring system and method based on machine intelligent prediction multi-parameter optical fiber sensor |
| CN110553674B (en) * | 2018-05-30 | 2021-05-18 | 华为技术有限公司 | Measuring method and measuring device |
| CN110553674A (en) * | 2018-05-30 | 2019-12-10 | 华为技术有限公司 | Measuring method and measuring device |
| CN111678456A (en) * | 2020-08-14 | 2020-09-18 | 武汉昊衡科技有限公司 | OFDR device for simultaneously measuring temperature and strain and measuring method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105222816B (en) | 2017-10-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105222816A (en) | Based on the multiparameter distributed optical fiber sensing system of modulating pulse and multiple scattering | |
| CN103115632B (en) | Multi-wavelength Brillouin optical time-domain analyzer | |
| CN102865914B (en) | Distributed optic fiber vibrating sensor | |
| CN102168953B (en) | Full-distributed optical fiber strain and vibration sensor based on coherent heterodyne detection | |
| CN104677396B (en) | Dynamic distributed Brillouin optical fiber sensing device and method | |
| CN103323040B (en) | A kind of many reference amounts distribution type optical fiber sensing equipment | |
| CN102937416B (en) | A kind of fully distributed fiber switched based on orthogonal polarisation state strains and vibration sensing method and device | |
| CN107238412B (en) | A kind of while monitoring vibration, stress, temperature distributed fiberoptic sensor | |
| CN104019836B (en) | Based on relevant dual-pulse time series technique Brillouin optical time domain analysis instrument and the method utilizing this analyser suppression common-mode noise | |
| CN102538985B (en) | Sensing signal detecting device and method based on fiber Brillouin ring laser | |
| CN103913186A (en) | Multiparameter distributed type optical fiber sensing system based on Rayleigh scattering and Raman scattering | |
| CN206496768U (en) | A kind of phase sensitive optical time domain reflectometer based on chirp | |
| CN102928063B (en) | Distributive optical fiber vibration sensing system based on wave division multiplex technology | |
| CN107036734B (en) | Sensing method and sensor for temperature or strain of fully-distributed optical fiber | |
| CN103954348A (en) | Distributed optical fiber vibration sensing system based on differential pulse sequence | |
| CN102645268A (en) | Optical frequency division multiplexing phase-sensitive optical time domain reflectometer | |
| CN102967358B (en) | Distribution type optical fiber vibration sensor for time division multiplexing | |
| CN105806465A (en) | Novel [phi]-OTDR detection device based on fixed reflection points and detection method thereof | |
| CN103644962A (en) | Ultra long distance distributed optical fiber vibration sensing device | |
| CN207894512U (en) | Vibration sensor based on φ-OTDR | |
| CN106153089A (en) | A kind of distributed optical fiber sensing system | |
| CN105371941A (en) | Distributed optical fiber vibration sensing detection method based on optical circulator | |
| CN106404215A (en) | Design of distributed fiber sensing system based on Brillouin scattering | |
| CN204439100U (en) | Dynamic distributed Brillouin light fiber sensing equipment | |
| CN108254062A (en) | A kind of phase sensitive optical time domain reflection vibration detection device based on chaotic modulation |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20221207 Address after: No. 99, Xinfeng Avenue, Jiulongpo District, Chongqing Patentee after: Chongqing Major Intellectual Property Operations Co.,Ltd. Patentee after: Zhu Tao Address before: 14-2, No. 68-1, Cypress Forest, Shapingba District, Chongqing 400044 Patentee before: Zhu Tao Effective date of registration: 20221207 Address after: 14-2, No. 68-1, Cypress Forest, Shapingba District, Chongqing 400044 Patentee after: Zhu Tao Address before: 400044 No. 174 Sha Jie street, Shapingba District, Chongqing Patentee before: Chongqing University Effective date of registration: 20221207 Address after: 610100 No.1, Floor 4, Building 56, No. 888, Section 2, Chenglong Avenue, Damian Street, Chengdu Economic and Technological Development Zone (Longquanyi District), Sichuan Patentee after: Chengdu Taco Optoelectronic Technology Co.,Ltd. Address before: No. 99, Xinfeng Avenue, Jiulongpo District, Chongqing Patentee before: Chongqing Major Intellectual Property Operations Co.,Ltd. Patentee before: Zhu Tao |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20231201 Address after: No. 888, Section 2, Chenglong Avenue, Damian Street, Chengdu Economic and Technological Development Zone (Longquanyi District), Sichuan Province, 610101, Building 56, 4th Floor, No.1 Patentee after: Chengdu Taco Optoelectronic Technology Co.,Ltd. Patentee after: Chongqing Take Zhigan Technology Co.,Ltd. Address before: 610100 No.1, Floor 4, Building 56, No. 888, Section 2, Chenglong Avenue, Damian Street, Chengdu Economic and Technological Development Zone (Longquanyi District), Sichuan Patentee before: Chengdu Taco Optoelectronic Technology Co.,Ltd. |