CN108204858A - Vibration signal detecting system and detection method - Google Patents
Vibration signal detecting system and detection method Download PDFInfo
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- CN108204858A CN108204858A CN201611173935.5A CN201611173935A CN108204858A CN 108204858 A CN108204858 A CN 108204858A CN 201611173935 A CN201611173935 A CN 201611173935A CN 108204858 A CN108204858 A CN 108204858A
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- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H9/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by using radiation-sensitive means, e.g. optical means
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Abstract
The present invention discloses a kind of vibration signal detecting system and detection method, belongs to vibration detection field.The system includes：Vibrating sensing module, N number of pumping signal amplification module and N+1 detection signal amplification module, vibrating sensing module, N number of pumping signal amplification module and N+1 detection signal amplification module are sequentially connected, and there are one pumping signal amplification modules for tool between the adjacent detection signal amplification module of each two by sensor fibre；Vibrating sensing module is used to emit pumping signal and detection signal；Each pumping signal amplification module in N number of pumping signal amplification module is used to be amplified pumping signal；Each detection signal amplification module in N+1 detection signal amplification module is used under the excitation of pumping signal be amplified detection signal.The present invention solves the problems, such as that vibration signal detecting system is difficult to realize remote vibration signal detection, extends the detecting distance of vibration signal.The present invention detects for vibration signal.
Description
Technical field
The present invention relates to vibration detection field, more particularly to a kind of vibration signal detecting system and detection method.
Background technology
In the fields such as heavy construction structure health monitoring, petroleum pipeline protection, prevention of geological disaster, it is often necessary to use
Vibration signal around vibration signal detecting system detection target object (such as petroleum pipeline).Vibration signal detecting system can be with
To be based on phase sensitive optical time domain reflection (English：Phase-sensitive Optical Time-Domain
Reflectometer；Referred to as：Φ-OTDR) technology vibration signal detecting system, which has that positioning accuracy is high, sensitivity
The characteristics of high, is widely used in the fields such as fence intrusion detection, long-distance oil ＆ gas pipeline detection, boundary security protection.Wherein, Φ-OTDR
Technology is also known as the optical time domain reflection technology that scatter based on coherent rayleigh, the technology utilize optical signal in sensor fibre it is rear to
Vibration signal around Rayleigh scattering optical signal detecting target object.
In the relevant technologies, the vibration signal detecting system based on Φ-OTDR technique includes：Vibration testing equipment and sense light
Fibre, sensor fibre are laid with along target object, and one end of sensor fibre is connect with vibration testing equipment, and vibration testing equipment can
Launch detection optical signal, detection optical signal is transmitted along sensor fibre, during optical signal transmission is detected, works as target object
When surrounding is vibrated, vibration can cause detection optical signal to scatter and (that is to say detection light signal reflex) the backward Rayleigh of formation backward
Scattered light signal, backward Rayleigh scattering optical signal are transmitted to vibration testing equipment along sensor fibre, and vibration testing equipment is according to connecing
The power of the backward Rayleigh scattering optical signal received and the power of detection optical signal launched, determine shaking around sensor fibre
Dynamic signal, and using the vibration signal around sensor fibre as the vibration signal around target object.
In the implementation of the present invention, inventor has found that the relevant technologies have at least the following problems：
Optical signal and backward Rayleigh scattering optical signal are detected during transmission all there are energy loss, and detect away from
It is bigger from longer energy loss, vibration signal detecting system is caused to be difficult to realize remote vibration signal detection.
Invention content
In order to solve the problems, such as that vibration signal detecting system is difficult to realize remote vibration signal detection, the present invention provides
A kind of vibration signal detecting system and detection method.The technical solution is as follows：
In a first aspect, a kind of vibration signal detecting system is provided, the system comprises：Vibrating sensing module, N number of excitation letter
Number amplification module and N+1 detection signal amplification module, N >=1,
The vibrating sensing module, N number of pumping signal amplification module and the N+1 detection signal amplification module lead to
It crosses sensor fibre to be sequentially connected, and there are one the pumping signals for tool between the adjacent detection signal amplification module of each two
Amplification module；
The vibrating sensing module is used to emit pumping signal and detection signal, the pumping signal and the detection signal
It can be transmitted along the sensor fibre；
Each pumping signal amplification module in N number of pumping signal amplification module is used for described each sharp to being transmitted to
The pumping signal for encouraging signal amplification module is amplified；
Each detection signal amplification module in the N+1 detection signal amplification module be used for be transmitted to it is described each
Under the excitation for detecting the pumping signal of signal amplification module, to being transmitted to the detection signal of each detection signal amplification module
It is amplified；
Wherein, the detection signal before amplification and the amplified detection signal are all used to detect the sensor fibre
The vibration signal of surrounding.
Optionally, each pumping signal amplification module in N number of pumping signal amplification module includes：Pumping signal is put
Big device, the pumping signal amplifier are believed by sensor fibre with the detection at each pumping signal amplification module both ends respectively
The connection of number amplification module, the pumping signal amplifier is for putting the pumping signal by the pumping signal amplifier
Greatly.
Optionally, the pumping signal amplifier is thulium doped fiber amplifier TDFA.
Optionally, the pumping signal and the detection signal are all optical signal, and the vibrating sensing module includes：Excitation
Unit and detection unit, the exciting unit and the detection unit amplify mould by sensor fibre and first detection signal respectively
Block connects, and the first detection signal amplification module is the detection signal amplification module being connect with the vibrating sensing module, institute
Exciting unit is stated for sending out the pumping signal, the detection unit is used to send out the detection signal.
Optionally, the vibrating sensing module further includes：Wavelength division multiplexer, the wavelength division multiplexer pass through sense light respectively
Fine to be connect with the exciting unit, the detection unit and the first detection signal amplification module, the wavelength division multiplexer is used
Converge signal in being converged to obtain to the pumping signal by the wavelength division multiplexer and the detection signal, make described
Pumping signal and the detection signal can be transmitted along same root sensor fibre.
Optionally, each pumping signal amplification module in N number of pumping signal amplification module further includes：First wavelength-division
Multiplexer and the second wavelength division multiplexer, first wavelength division multiplexer and second wavelength division multiplexer are connected by sensor fibre
It connects, first wavelength division multiplexer is connected with the detection signal amplification module close to first wavelength division multiplexer by sensor fibre
It connects, second wavelength division multiplexer is connected with the detection signal amplification module close to second wavelength division multiplexer by sensor fibre
Connect, the pumping signal amplifier by sensor fibre respectively with first wavelength division multiplexer and second wavelength division multiplexer
Connection；
First wavelength division multiplexer be used for by first wavelength division multiplexer converge signal carry out it is isolated
Pumping signal and detection signal, the pumping signal pass through sensor fibre and the pumping signal amplifier transfer to described second
Wavelength division multiplexer, the detection signal are transmitted to second wavelength division multiplexer by sensor fibre；
The pumping signal amplifier is used to be amplified the pumping signal by the pumping signal amplifier；
Second wavelength division multiplexer is used for pumping signal and detection signal to being transmitted to second wavelength division multiplexer
Converged to obtain and converge signal.
Optionally, each detection signal amplification module in the N+1 detection signal amplification module includes：Detect signal
Amplifier, the detection signal amplifier is erbium-doped optical fiber amplifier EDFA.
Optionally, the exciting unit includes excitation light source, described to encourage light source as pump light source, the detection unit packet
Circulator and detection light source are included, the circulator is connect with the detection light source by sensor fibre.
Optionally, the system also includes：Host computer, the host computer is electrically connected with the vibrating sensing module, described
Host computer is used to that the vibrating sensing module to be controlled to send out pumping signal and detection signal.
Optionally, N=1.
Second aspect provides a kind of vibration signal detection method, for the vibration signal detecting system described in first aspect,
The method includes：
Vibrating sensing module transmitting pumping signal and detection signal are controlled, the pumping signal and the detection signal can
It is transmitted along sensor fibre；
Each pumping signal amplification module in N number of pumping signal amplification module is controlled to believe being transmitted to each excitation
The pumping signal of number amplification module is amplified, and each detection signal in N+1 detection signal amplification module is controlled to amplify mould
Block is in the case where being transmitted to the excitation of pumping signal of each detection signal amplification module, to being transmitted to each detection signal
The detection signal of amplification module is amplified, N >=1；
Wherein, the detection signal before amplification and the amplified detection signal are all used to detect the sensor fibre
The vibration signal of surrounding.
Optionally, N=1 controls each pumping signal amplification module in N number of pumping signal amplification module to being transmitted to
The pumping signal for stating each pumping signal amplification module is amplified, and controls each inspection in N+1 detection signal amplification module
Signal amplification module is surveyed in the case where being transmitted to the excitation of pumping signal of each detection signal amplification module, it is described to being transmitted to
The detection signal of each detection signal amplification module is amplified, including：
Control first detection signal amplification module is being transmitted to the pumping signal of the first detection signal amplification module
Under excitation, the detection signal for being transmitted to the first detection signal amplification module is amplified, the first detection signal is put
Big module is the detection signal amplification module being connect with the vibrating sensing module；
Control pumping signal amplification module is amplified the pumping signal for being transmitted to the pumping signal amplification module, obtains
To amplified pumping signal；
The second detection signal amplification module of control is being transmitted to the amplified sharp of the second detection signal amplification module
Under the excitation for encouraging signal, the detection signal for being transmitted to the second detection signal amplification module is amplified, second inspection
Signal amplification module is surveyed as the detection signal in 2 detection signal amplification modules in addition to the first detection signal amplification module
Amplification module.
The advantageous effect that technical solution provided by the invention is brought is：
Vibration signal detecting system and detection method provided by the invention, vibration signal detecting system include：Vibrating sensing
Module, N number of pumping signal amplification module and N+1 detection signal amplification module, vibrating sensing module are used to emit pumping signal
With detection signal；Each pumping signal amplification module in N number of pumping signal amplification module is used to believe being transmitted to each excitation
The pumping signal of number amplification module is amplified；Each detection signal amplification module in N+1 detection signal amplification module is used
In be transmitted to it is each detection signal amplification module pumping signal excitation under, to be transmitted to it is each detection signal amplification module
Detection signal be amplified；Detection signal and amplified detection signal before amplification are all used to detect around sensor fibre
Vibration signal.Since pumping signal amplification module can be amplified pumping signal, detection signal amplification module can swash
It encourages and detection signal is amplified under the excitation of signal, therefore, the energy loss of detection signal can be made up, solve vibration letter
Number detecting system is difficult to realize the problem of remote vibration signal detection, extends the detecting distance of vibration signal.
It should be understood that above general description and following detailed description is only exemplary, this can not be limited
Invention.
Description of the drawings
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, the accompanying drawings in the following description is only some embodiments of the present invention, for
For those of ordinary skill in the art, without creative efforts, other are can also be obtained according to these attached drawings
Attached drawing.
Fig. 1 is a kind of structure diagram of vibration signal detecting system provided in an embodiment of the present invention；
Fig. 2 is the structure diagram of another vibration signal detecting system provided in an embodiment of the present invention；
Fig. 3 is a kind of method flow diagram of vibration signal detection method provided in an embodiment of the present invention；
Fig. 4 is a kind of method flow diagram being amplified to pumping signal and detection signal provided in an embodiment of the present invention.
Attached drawing herein is incorporated into specification and forms the part of this specification, shows the implementation for meeting the present invention
Example, and be used to explain the principle of the present invention together with specification.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention is made below in conjunction with attached drawing into
It is described in detail to one step, it is clear that described embodiment is only the implementation of part of the embodiment of the present invention rather than whole
Example.Based on the embodiments of the present invention, those of ordinary skill in the art are obtained without making creative work
All other embodiment, shall fall within the protection scope of the present invention.
It please refers to Fig.1, it illustrates a kind of structural representations of vibration signal detecting system 00 provided in an embodiment of the present invention
Figure, which can be the vibration signal detecting system based on Φ-OTDR technique, for detecting sense light
Vibration signal around fine.Referring to Fig. 1, which includes：Vibrating sensing module 01, N number of pumping signal
Amplification module 02 and N+1 detection signal amplification module 03, N >=1.
Vibrating sensing module 01, N number of pumping signal amplification module 02 and N+1 detection signal amplification module 03 pass through sensing
Optical fiber 04 is sequentially connected, and there are one pumping signal amplification modules for tool between the adjacent detection signal amplification module 03 of each two
02；
For vibrating sensing module 01 for emitting pumping signal and detection signal, pumping signal and detection signal can be along sensings
Optical fiber 04 transmits；
Each pumping signal amplification module 02 in N number of pumping signal amplification module 02 is used to believe being transmitted to each excitation
The pumping signal of number amplification module 02 is amplified；
Each detection signal amplification module 03 in N+1 detection signal amplification module 03 is used to be transmitted to each detection
Under the excitation of the pumping signal of signal amplification module 03, the detection signal for being transmitted to each detection signal amplification module 03 is carried out
Amplification；
Wherein, the detection signal before amplification and amplified detection signal are all believed for detecting the vibration around sensor fibre
Number.
In conclusion vibration signal detecting system provided in an embodiment of the present invention, since pumping signal amplification module can
Pumping signal is amplified, detection signal amplification module can be amplified detection signal under the excitation of pumping signal,
Therefore, the energy loss of detection signal can be made up, vibration signal detecting system is solved and is difficult to realize vibrate letter at a distance
The problem of number detection, extend the detecting distance of vibration signal.
Optionally, in embodiments of the present invention, N=1, detection signal amplification module 03 are amplified quite detection signal
In the gain for increasing detection signal, therefore, detection signal amplification module 03 is properly termed as remote gain module again, and the present invention is real
Example is applied to be not construed as limiting this.
It please refers to Fig.2, the structure it illustrates another vibration signal detecting system 00 provided in an embodiment of the present invention is shown
It is intended to, referring to Fig. 2, each pumping signal amplification module 02 in N number of pumping signal amplification module 02 includes：Pumping signal is amplified
Device.Pumping signal amplifier is amplified by sensor fibre 04 with the detection signal at each 02 both ends of pumping signal amplification module respectively
Module 03 connects, and pumping signal amplifier is used to be amplified the pumping signal by pumping signal amplifier.Such as Fig. 2 institutes
Show, which can be thulium doped fiber amplifier (English：Thulium-doped Optical Fiber
Amplifier；Referred to as：TDFA)021.In embodiments of the present invention, which is mainly used for by mixing
The pumping signal of thulium fiber amplifier 021 is amplified, and the concrete structure of thulium doped fiber amplifier 021 can refer to related skill
Art, details are not described herein for the embodiment of the present invention.
Optionally, in embodiments of the present invention, pumping signal and detection signal are all optical signal, as shown in Fig. 2, vibration passes
Sense module 01 includes：Exciting unit 011 and detection unit 012.Exciting unit 011 and detection unit 012 pass through sense light respectively
Fibre 04 is connect with first detection signal amplification module 03, first detection signal amplification module 03 for directly by sensor fibre 04 and
The detection signal amplification module that vibrating sensing module 01 connects, exciting unit 011 are used to send out pumping signal, detection unit 012
For sending out detection signal.
Further, as shown in Fig. 2, vibrating sensing module 01 further includes：Wavelength division multiplexer 013.Wavelength division multiplexer 013 divides
It is not connect by sensor fibre 04 with exciting unit 011, detection unit 012 and first detection signal amplification module 03, wavelength-division is multiple
It with device 013 is used to that the pumping signal by wavelength division multiplexer 013 and detection signal to be converged to obtain to converge signal, makes excitation
Signal and detection signal can be transmitted along same root sensor fibre.In embodiments of the present invention, wavelength division multiplexer 013 can have
Two signal input ports and a signal output port, a signal input port are connect with exciting unit 011, another letter
Number input port is connect with detection unit 012, and signal output port is connect with first detection signal amplification module 03.Wherein, wave
The concrete structure of division multiplexer 013 can refer to the relevant technologies, and details are not described herein for the embodiment of the present invention.
Further, as shown in Fig. 2, each pumping signal amplification module 02 in N number of pumping signal amplification module 02 is gone back
Including：First wavelength division multiplexer 022 and the second wavelength division multiplexer 023, the first wavelength division multiplexer 022 and the second wavelength division multiplexer
023 is connected by sensor fibre 04, and the first wavelength division multiplexer 022 amplifies with the detection signal close to the first wavelength division multiplexer 022
Module 03 is connected by sensor fibre 04, and the second wavelength division multiplexer 023 is put with the detection signal close to the second wavelength division multiplexer 023
Big module 03 is connected by sensor fibre 04, pumping signal amplifier by sensor fibre 04 respectively with the first wavelength division multiplexer
022 and second wavelength division multiplexer 023 connect.First wavelength division multiplexer 022 was used for converging by the first wavelength division multiplexer 022
Signal carries out isolated pumping signal and detection signal, and pumping signal passes through sensor fibre 04 and pumping signal amplifier transfer
To the second wavelength division multiplexer 023, detection signal is transmitted to the second wavelength division multiplexer 023 by sensor fibre 04；Pumping signal is put
Big device is used to be amplified the pumping signal by pumping signal amplifier；Second wavelength division multiplexer 023 is used for being transmitted to
The pumping signal and detection signal of second wavelength division multiplexer 023, which are converged to obtain, converges signal.Wherein, the first wavelength division multiplexer
022 can be demultiplexer, tool there are one signal input port and two signal output ports, signal input port with it is close
The detection signal amplification module 03 of first wavelength division multiplexer 022 connects, a signal output port and thulium doped fiber amplifier 021
Connection, another signal output port are connect with the second wavelength division multiplexer 023, and the concrete structure of the first wavelength division multiplexer 022 can
To refer to the relevant technologies, the structure of the second wavelength division multiplexer 023 can be identical with the structure of wavelength division multiplexer 013, and the present invention is real
Applying example, details are not described herein.
Optionally, as shown in Fig. 2, each detection signal amplification module 03 in N+1 detection signal amplification module 03 wraps
Detection signal amplifier is included, detection signal amplifier can be erbium-doped fiber amplifier (English：Erbium-doped Optical
Fiber Amplifier；Referred to as：EDFA)031.The erbium-doped fiber amplifier 031 is mainly used for into erbium-doped fiber amplifier
Under the excitation for converging the pumping signal in signal in 031, the detection signal converged to this in signal is amplified, Er-doped fiber
The concrete structure of amplifier 031 can refer to the relevant technologies, and details are not described herein for the embodiment of the present invention.
Optionally, in embodiments of the present invention, exciting unit 011 includes excitation light source, and excitation light source is pump light source
0111, detection unit 012 includes circulator 0121 and detection light source (being not shown in Fig. 2), and circulator 0121 can with detection light source
To be connected by sensor fibre (being not shown in Fig. 2).Wherein, for pump light source for sending out pumping signal, the pumping signal is usual
For pump light signals, for sending out detection signal, circulator 0121 is used to make the detection signal that detection light source is sent out detection light source
Unidirectional loop transmits.In embodiments of the present invention, the wavelength for detecting signal is about 150 nanometers, and the wavelength of pumping signal is about
1480 nanometers, the embodiment of the present invention is not construed as limiting this.
Optionally, as shown in Fig. 2, the vibration signal detecting system further includes：Host computer 05, host computer 05 and vibrating sensing
Module 01 is electrically connected, and host computer 05 is used to that vibrating sensing module 01 to be controlled to send out pumping signal and detection signal.Wherein, host computer
05 is specifically as follows computer, mobile phone etc..In embodiments of the present invention, vibrating sensing module 01 can also include signal receiving unit
(being not shown in Fig. 2), the signal receiving unit can receive backward Rayleigh scattering optical signal, and host computer 05 is except control vibrating sensing
Module 01 is sent out except pumping signal and detection signal, the backward Rayleigh scattering light that can also be received according to signal receiving unit
The power of detection signal that the power and detection unit of signal are launched, determines the vibration signal around sensor fibre 04, this hair
Details are not described herein for bright embodiment.
In conclusion vibration signal detecting system provided in an embodiment of the present invention, since pumping signal amplification module can
Pumping signal is amplified, detection signal amplification module can be amplified detection signal under the excitation of pumping signal,
Therefore, the energy loss of detection signal can be made up, vibration signal detecting system is solved and is difficult to realize vibrate letter at a distance
The problem of number detection, extend the detecting distance of vibration signal.
Vibration signal detecting system provided in an embodiment of the present invention, utilizes erbium-doped fiber amplifier and thulium doped fiber amplifier
The technology of Hybrid amplifier compensates the attenuation of optical signal in the vibration signal detecting system based on Φ-OTDR technique, so as to extend
The detecting distance of system.
Distributed optical fiber vibration sensor has the incomparable advantage of traditional sensors, and compared to traditional distribution
Optical fibre vibration sensor, the distributed optical fiber vibration sensor based on coherent rayleigh scattering technology are high, clever with more positioning accuracy
The advantages such as sensitivity height, the distributed optical fiber vibration sensor based on coherent rayleigh scattering technology utilize backward auspicious in sensor fibre
Vibration signal around profit scattering optical interference signals detection sensor fibre.Vibration signal detection system provided in an embodiment of the present invention
System detects vibration signal based on coherent rayleigh scattering technology, and positioning accuracy is high, high sensitivity.
In the relevant technologies, with the extension of detecting distance, optical signal becomes very weak, especially backward Rayleigh scattering optical signal
Become extremely faint, this brings very big difficulty for the detection of vibration signal detecting system.For this purpose, the relevant technologies are by the two-way drawing of single order
Graceful amplifier is applied in vibration signal detecting system (such as Φ-OTDR sensor-based systems), and the two-way raman amplifier of single order can be right
Backward Rayleigh scattering optical signal is amplified so that and detecting distance extends to 50 kms, but the two-way raman amplifier of single order
Raman gain coefficienct is not uniform, causes the power swing for detecting signal (such as backward Rayleigh scattering optical signal) apparent, influences
The detection of vibration signal.In order to overcome this problem, the relevant technologies again examine above-mentioned vibration signal using hybrid Raman amplifier
Examining system is improved.But the two-way raman amplifier of single order is added in either in vibration signal detecting system and is still mixed
Raman amplifier is required for increasing Raman light source in systems, makes system structure complex, improves the cost of system.This
The vibration signal detecting system that inventive embodiments provide, without adding in the two-way Raman amplifiction of single order in vibration signal detecting system
Device and/or hybrid Raman amplifier, avoid the influence of the uneven detection process to vibration signal of Raman gain coefficienct, and by
In without Raman light source, therefore, vibration signal detecting system provided in an embodiment of the present invention is simple in structure and cost is relatively low.
Chinese patent (application number：201410440880.4) provide a kind of vibration signal detecting system, the vibration signal
Detecting system extends detecting distance by adding in relay amplifier in sensor fibre circuit, but the system needs offer more
A pump light source provides excitation come multiple remote gain modules for series connection, and needs to occupy a plurality of optical fiber, while multiple pumpings
Light source also increases the cost and enforcement difficulty of system.And vibration signal detecting system provided in an embodiment of the present invention without
Multiple pump light sources, and only need an optical fiber that can extend the detecting distance of vibration signal, system cost is relatively low, implements
Journey is simple.
Vibration signal detecting system provided in an embodiment of the present invention can be applied to method hereafter, in the embodiment of the present invention
Vibration signal detection method and testing principle may refer to the description in hereafter each embodiment.
It please refers to Fig.3, it illustrates a kind of method flow diagram of vibration signal detection method provided in an embodiment of the present invention,
The vibration signal detection method can be used for vibration signal detecting system shown in fig. 1 or fig. 2.Referring to Fig. 3, vibration signal inspection
Survey method can include：
Step 301, control vibrating sensing module transmitting pumping signal and detection signal, pumping signal and detection signal can
It is transmitted along sensor fibre.
Each pumping signal amplification module in step 302, the N number of pumping signal amplification module of control is each sharp to being transmitted to
The pumping signal for encouraging signal amplification module is amplified, and each detection signal in N+1 detection signal amplification module is controlled to put
Big module is in the case where being transmitted to the excitation of pumping signal of each detection signal amplification module, to being transmitted to each detection signal amplification
The detection signal of module is amplified, N >=1.
Wherein, the detection signal before amplification and amplified detection signal are all believed for detecting the vibration around sensor fibre
Number.
In conclusion vibration signal detection method provided in an embodiment of the present invention, since pumping signal amplification module can
Pumping signal is amplified, detection signal amplification module can be amplified detection signal under the excitation of pumping signal,
Therefore, the energy loss of detection signal can be made up, vibration signal detecting system is solved and is difficult to realize vibrate letter at a distance
The problem of number detection, extend the detecting distance of vibration signal.
Wherein, as shown in Fig. 2, in step 301, host computer 05 can be to the exciting unit in vibrating sensing module 01
011 and detection unit 012 controlled, exciting unit 011 is made to launch pumping signal, detection unit 012 launches detection letter
Number, pumping signal and detection signal enter wavelength division multiplexer 013 together, and wavelength division multiplexer 013 is to pumping signal and detection signal
Converged to obtain and converge signal, converged signal and be transmitted to by sensor fibre 04 and directly pass through sensing with vibrating sensing module 01
In the detection signal amplification module 03 that optical fiber 04 connects.Wherein, pumping signal is usually pump light signals.
Optionally, N=1 is please referred to Fig.4, and it illustrates a kind of method streams being amplified to signal that step 302 provides
Cheng Tu, referring to Fig. 4, this method can include：
Sub-step 3021, control first detection signal amplification module are in the excitation for being transmitted to first detection signal amplification module
Under the excitation of signal, the detection signal for being transmitted to first detection signal amplification module is amplified, first detection signal amplification
Module is the detection signal amplification module being connect with vibrating sensing module.
As shown in Fig. 2, the signal that converges that first detection signal amplification module 03 is transmitted to from wavelength division multiplexer 013 enters the
In erbium-doped fiber amplifier 031 in one detection signal amplification module 03, the swashing in signal is converged of erbium-doped fiber amplifier 031
Under the excitation for encouraging signal (pump light signals), the detection signal converged in signal is amplified, in the process, a part swashs
It encourages signal to be consumed, the energy for the pumping signal not being consumed is relatively low, insufficient to provide for next detection signal amplification module
It encourages, in the embodiment of the present invention, the pumping signal not being consumed and amplified detection signal are transmitted by sensor fibre 04
To pumping signal amplification module 02, and specific the first wavelength division multiplexer 022 for entering pumping signal amplification module 02.
Sub-step 3022, control pumping signal amplification module carry out the pumping signal for being transmitted to pumping signal amplification module
Amplification, obtains amplified pumping signal.
As shown in Fig. 2, the first wavelength division multiplexer 022 solves the signal that converges for being transmitted to the first wavelength division multiplexer 022
It is multiplexed the pumping signal not being consumed and amplified detection signal, the pumping signal not being consumed is answered by the first wavelength-division
Thulium doped fiber amplifier 021 is transmitted to the sensor fibre 04 between device 022 and thulium doped fiber amplifier 021, thulium doped fiber is put
Big device 021 is amplified the pumping signal that this is not consumed to obtain amplified pumping signal, the amplified pumping signal
Second wavelength division multiplexer is transmitted to by the sensor fibre 04 between 021 and second wavelength division multiplexer 023 of thulium doped fiber amplifier
023。
It should be noted that in this step 3022, the amplified detection transmitted out from the first wavelength division multiplexer 022 is believed
Number can the second wavelength-division be transmitted to by the sensor fibre 04 between the first wavelength division multiplexer 022 and the second wavelength division multiplexer 023
Multiplexer 023, the second wavelength division multiplexer 023, which converges amplified pumping signal and amplified detection signal, to be put
Converge signal greatly, which converges signal can be transmitted to the second detection signal amplification module 03 along sensor fibre 04.
Sub-step 3023, control the second detection signal amplification module are in the amplification for being transmitted to the second detection signal amplification module
Under the excitation of pumping signal afterwards, the detection signal for being transmitted to the second detection signal amplification module is amplified, the second detection
Signal amplification module amplifies mould for the detection signal in 2 detection signal amplification modules in addition to first detection signal amplification module
Block.
As shown in Fig. 2, the amplification that the second detection signal amplification module 03 is transmitted to from the second wavelength division multiplexer 023 converges letter
Number entrance second is detected in the erbium-doped fiber amplifier 031 in signal amplification module 03, and erbium-doped fiber amplifier 031 converges in amplification
Under the excitation for closing the amplified pumping signal in signal, the amplified detection signal in signal is converged to amplification and is put
Greatly, in the process, a part of amplified pumping signal is consumed, the pumping signal not being consumed and amplified detection
Signal is transmitted to next pumping signal amplification module (being not shown in Fig. 2) by sensor fibre 04.
In conclusion vibration signal detection method provided in an embodiment of the present invention, since pumping signal amplification module can
Pumping signal is amplified, detection signal amplification module can be amplified detection signal under the excitation of pumping signal,
Therefore, the energy loss of detection signal can be made up, vibration signal detecting system is solved and is difficult to realize vibrate letter at a distance
The problem of number detection, extend the detecting distance of vibration signal.
Vibration signal detection method provided in an embodiment of the present invention, utilizes erbium-doped fiber amplifier and thulium doped fiber amplifier
The technology of Hybrid amplifier compensates the attenuation of optical signal in the vibration signal detecting system based on Φ-OTDR technique, so as to extend
The detecting distance of system.
It should be noted that：Vibration of the vibration signal detecting system that above-described embodiment provides around detection sensor fibre
It, can be as needed and by above-mentioned work(only with the division progress of above-mentioned each function module for example, in practical application during signal
It can distribute and be completed by different function modules.In addition, the vibration signal detecting system that above-described embodiment provides is examined with vibration signal
It surveys embodiment of the method and belongs to same design, specific implementation process can be referred to mutually, and which is not described herein again.
Term "and/or" in the present invention, only a kind of incidence relation for describing affiliated partner, expression may have three kinds
Relationship, for example, A and/or B, can represent：Individualism A exists simultaneously A and B, these three situations of individualism B.In addition, this
Character "/" in text, it is a kind of relationship of "or" to typically represent forward-backward correlation object.
One of ordinary skill in the art will appreciate that hardware can be passed through by realizing all or part of step of above-described embodiment
It completes, relevant hardware can also be instructed to complete by program, the program can be stored in a kind of computer-readable
In storage medium, storage medium mentioned above can be read-only memory, disk or CD etc..
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all the present invention spirit and
Within principle, any modification, equivalent replacement, improvement and so on should all be included in the protection scope of the present invention.
Claims (12)
1. a kind of vibration signal detecting system, which is characterized in that the system comprises：Vibrating sensing module, N number of pumping signal are put
Big module and N+1 detection signal amplification module, N >=1,
The vibrating sensing module, N number of pumping signal amplification module and the N+1 detection signal amplification module pass through biography
Photosensitive fibre is sequentially connected, and there are one the pumping signals to amplify for tool between the adjacent detection signal amplification module of each two
Module；
For the vibrating sensing module for emitting pumping signal and detection signal, the pumping signal and the detection signal can
It is transmitted along the sensor fibre；
Each pumping signal amplification module in N number of pumping signal amplification module is used to believe being transmitted to each excitation
The pumping signal of number amplification module is amplified；
Each detection signal amplification module in the N+1 detection signal amplification module is used to be transmitted to each detection
Under the excitation of the pumping signal of signal amplification module, the detection signal for being transmitted to each detection signal amplification module is carried out
Amplification；
Wherein, the detection signal before amplification and the amplified detection signal are all used to detect around the sensor fibre
Vibration signal.
2. system according to claim 1, which is characterized in that each excitation in N number of pumping signal amplification module
Signal amplification module includes：Pumping signal amplifier,
The pumping signal amplifier is believed by sensor fibre with the detection at each pumping signal amplification module both ends respectively
The connection of number amplification module, the pumping signal amplifier is for putting the pumping signal by the pumping signal amplifier
Greatly.
3. system according to claim 2, which is characterized in that the pumping signal amplifier is thulium doped fiber amplifier
TDFA。
4. system according to claim 2, which is characterized in that the pumping signal and the detection signal are all believed for light
Number, the vibrating sensing module includes：Exciting unit and detection unit,
The exciting unit and the detection unit are connect respectively by sensor fibre with first detection signal amplification module, described
First detection signal amplification module is the detection signal amplification module being connect with the vibrating sensing module, and the exciting unit is used
In sending out the pumping signal, the detection unit is used to send out the detection signal.
5. system according to claim 4, which is characterized in that the vibrating sensing module further includes：Wavelength division multiplexer,
The wavelength division multiplexer is believed respectively by the sensor fibre and exciting unit, the detection unit and first detection
The connection of number amplification module, the wavelength division multiplexer are used for the pumping signal by the wavelength division multiplexer and the detection
Signal, which is converged to obtain, converges signal, and the pumping signal and the detection signal is enable to be passed along same root sensor fibre
It is defeated.
6. system according to claim 5, which is characterized in that
Each pumping signal amplification module in N number of pumping signal amplification module further includes：First wavelength division multiplexer and
Two wavelength division multiplexers, first wavelength division multiplexer are connected with second wavelength division multiplexer by sensor fibre, and described first
Wavelength division multiplexer is connect with the detection signal amplification module close to first wavelength division multiplexer by sensor fibre, and described second
Wavelength division multiplexer is connect with the detection signal amplification module close to second wavelength division multiplexer by sensor fibre, the excitation
Signal amplifier is connect by sensor fibre with first wavelength division multiplexer and second wavelength division multiplexer respectively；
First wavelength division multiplexer is used for carrying out isolated excitation by the signal that converges of first wavelength division multiplexer
Signal and detection signal, the pumping signal pass through sensor fibre and the pumping signal amplifier transfer to second wavelength-division
Multiplexer, the detection signal are transmitted to second wavelength division multiplexer by sensor fibre；
The pumping signal amplifier is used to be amplified the pumping signal by the pumping signal amplifier；
Second wavelength division multiplexer is used for pumping signal and detection signal progress to being transmitted to second wavelength division multiplexer
Converge to obtain and converge signal.
7. system according to any one of claims 1 to 6, which is characterized in that
Each detection signal amplification module in the N+1 detection signal amplification module includes：Signal amplifier is detected, it is described
Detection signal amplifier is erbium-doped optical fiber amplifier EDFA.
8. according to any system of claim 4 to 6, which is characterized in that the exciting unit includes excitation light source, described
Excitation light source is pump light source, and the detection unit includes circulator and detection light source, the circulator and the detection light source
It is connected by sensor fibre.
9. system according to any one of claims 1 to 6, which is characterized in that the system also includes：Host computer, it is described on
Position machine is electrically connected with the vibrating sensing module,
The host computer is used to that the vibrating sensing module to be controlled to send out pumping signal and detection signal.
10. system according to any one of claims 1 to 6, which is characterized in that N=1.
11. a kind of vibration signal detection method, which is characterized in that for any vibration signal inspection of claims 1 to 10
Examining system, the method includes：
Vibrating sensing module transmitting pumping signal and detection signal are controlled, the pumping signal and the detection signal can be along biographies
Photosensitive fine transmission；
Each pumping signal amplification module in N number of pumping signal amplification module is controlled to be put to being transmitted to each pumping signal
The pumping signal of big module is amplified, and each detection signal amplification module in N+1 detection signal amplification module is controlled to exist
It is transmitted under the excitation of the pumping signal of each detection signal amplification module, to being transmitted to each detection signal amplification
The detection signal of module is amplified, N >=1；
Wherein, the detection signal before amplification and the amplified detection signal are all used to detect around the sensor fibre
Vibration signal.
12. according to the method for claim 11, which is characterized in that N=1,
Each pumping signal amplification module in N number of pumping signal amplification module is controlled to be put to being transmitted to each pumping signal
The pumping signal of big module is amplified, and each detection signal amplification module in N+1 detection signal amplification module is controlled to exist
It is transmitted under the excitation of the pumping signal of each detection signal amplification module, to being transmitted to each detection signal amplification
The detection signal of module is amplified, including：
Control excitation of the first detection signal amplification module in the pumping signal for being transmitted to the first detection signal amplification module
Under, the detection signal for being transmitted to the first detection signal amplification module is amplified, the first detection signal amplifies mould
Block is the detection signal amplification module being connect with the vibrating sensing module；
Control pumping signal amplification module is amplified the pumping signal for being transmitted to the pumping signal amplification module, is put
Pumping signal after big；
The second detection signal amplification module of control is in the amplified excitation letter for being transmitted to the second detection signal amplification module
Number excitation under, to be transmitted to it is described second detection signal amplification module detection signal be amplified, it is described second detection letter
Number amplification module is the detection signals amplification in 2 detection signal amplification modules in addition to the first detection signal amplification module
Module.
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Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1419354A (en) * | 2002-11-29 | 2003-05-21 | 清华大学 | WDM system channel power dynamic equalization method equalizing optical amplifier thereof |
| US20030147120A1 (en) * | 2001-12-22 | 2003-08-07 | Dong-Xue Wang | Method and system for recycling pump power in an erbium doped fiber amplifier |
| KR20030089278A (en) * | 2002-05-17 | 2003-11-21 | (주)엠디케이 | Multi-Stage Erbium Doped Amplifier for Wavelength Division Multiplexing System |
| CN101621175A (en) * | 2009-06-23 | 2010-01-06 | 中兴通讯股份有限公司 | Optical fiber amplifier with chromatic dispersion compensating function and method |
| CN101839760A (en) * | 2010-05-21 | 2010-09-22 | 上海华魏光纤传感技术有限公司 | Distributed optical fiber vibration sensor based on relay amplifying and sensing technology and method thereof |
| CN101893802A (en) * | 2010-06-25 | 2010-11-24 | 上海华魏光纤传感技术有限公司 | Photo-sensing relay amplifier and method thereof |
| CN101950913A (en) * | 2010-08-12 | 2011-01-19 | 上海拜安实业有限公司 | Fiber laser source based on pulse seed source amplification and fiber sensing system |
| CN102818657A (en) * | 2012-09-06 | 2012-12-12 | 威海北洋电气集团股份有限公司 | Long-distance distributed Raman temperature sensor based on erbium-doped optical fiber amplifier (EDFA) amplification technology |
| CN102840929A (en) * | 2012-09-05 | 2012-12-26 | 电子科技大学 | Long-distance Raman distributed temperature sensing system |
| CN103698959A (en) * | 2012-09-27 | 2014-04-02 | 上海华魏光纤传感技术有限公司 | Remote optical pumped amplifier for distributed optical fiber sensing |
| CN103954311A (en) * | 2014-03-11 | 2014-07-30 | 中国科学院上海光学精密机械研究所 | Phase-sensitive optical time domain reflectometer based on Brillouin amplification |
| CN104236696A (en) * | 2014-09-01 | 2014-12-24 | 中国石油天然气股份有限公司 | Optical fiber vibration detection method and system based on foreign fiber remote pump amplifying |
| CN105258781A (en) * | 2015-09-24 | 2016-01-20 | 中国石油天然气股份有限公司 | Optical fiber vibration detection system and optical fiber vibration detection method |
| CN205646422U (en) * | 2016-04-14 | 2016-10-12 | 中国石油天然气集团公司 | Passive light amplifier |
-
2016
- 2016-12-16 CN CN201611173935.5A patent/CN108204858B/en active Active
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030147120A1 (en) * | 2001-12-22 | 2003-08-07 | Dong-Xue Wang | Method and system for recycling pump power in an erbium doped fiber amplifier |
| KR20030089278A (en) * | 2002-05-17 | 2003-11-21 | (주)엠디케이 | Multi-Stage Erbium Doped Amplifier for Wavelength Division Multiplexing System |
| CN1419354A (en) * | 2002-11-29 | 2003-05-21 | 清华大学 | WDM system channel power dynamic equalization method equalizing optical amplifier thereof |
| CN101621175A (en) * | 2009-06-23 | 2010-01-06 | 中兴通讯股份有限公司 | Optical fiber amplifier with chromatic dispersion compensating function and method |
| CN101839760A (en) * | 2010-05-21 | 2010-09-22 | 上海华魏光纤传感技术有限公司 | Distributed optical fiber vibration sensor based on relay amplifying and sensing technology and method thereof |
| CN101893802A (en) * | 2010-06-25 | 2010-11-24 | 上海华魏光纤传感技术有限公司 | Photo-sensing relay amplifier and method thereof |
| CN101950913A (en) * | 2010-08-12 | 2011-01-19 | 上海拜安实业有限公司 | Fiber laser source based on pulse seed source amplification and fiber sensing system |
| CN102840929A (en) * | 2012-09-05 | 2012-12-26 | 电子科技大学 | Long-distance Raman distributed temperature sensing system |
| CN102818657A (en) * | 2012-09-06 | 2012-12-12 | 威海北洋电气集团股份有限公司 | Long-distance distributed Raman temperature sensor based on erbium-doped optical fiber amplifier (EDFA) amplification technology |
| CN103698959A (en) * | 2012-09-27 | 2014-04-02 | 上海华魏光纤传感技术有限公司 | Remote optical pumped amplifier for distributed optical fiber sensing |
| CN103954311A (en) * | 2014-03-11 | 2014-07-30 | 中国科学院上海光学精密机械研究所 | Phase-sensitive optical time domain reflectometer based on Brillouin amplification |
| CN104236696A (en) * | 2014-09-01 | 2014-12-24 | 中国石油天然气股份有限公司 | Optical fiber vibration detection method and system based on foreign fiber remote pump amplifying |
| CN105258781A (en) * | 2015-09-24 | 2016-01-20 | 中国石油天然气股份有限公司 | Optical fiber vibration detection system and optical fiber vibration detection method |
| CN205646422U (en) * | 2016-04-14 | 2016-10-12 | 中国石油天然气集团公司 | Passive light amplifier |
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|---|---|
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