CN106980141A - Natural face rolling land matter exploration system - Google Patents
Natural face rolling land matter exploration system Download PDFInfo
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- CN106980141A CN106980141A CN201710266904.2A CN201710266904A CN106980141A CN 106980141 A CN106980141 A CN 106980141A CN 201710266904 A CN201710266904 A CN 201710266904A CN 106980141 A CN106980141 A CN 106980141A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V8/00—Prospecting or detecting by optical means
- G01V8/02—Prospecting
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A90/00—Technologies having an indirect contribution to adaptation to climate change
- Y02A90/30—Assessment of water resources
Abstract
The invention discloses a kind of natural face rolling land matter exploration system, single longitudinal mode laser is connected with one-level coupler, and the output of one-level coupler is connected with two diode couplers, and the output of two diode couplers is connected with the 1st, 3,5,7 three-level couplers respectively.1st, 2 three-level couplers and the 1st pair of single-mode fiber drum, 3rd, 4 three-level couplers and the 2nd pair of single-mode fiber drum, 5th, 6 three-level couplers and the 3rd pair of single-mode fiber drum, 7th, 8 three-level couplers and the 4th pair of single-mode fiber drum respectively constitute the 1st 4 Mach Zehnder interferometry vibrating sensing module, the signal of generation is respectively through the 2nd, 4, 6, 8 three-level couplers transport to the 1st 4 optical-electrical converter, 1st 4 optical-electrical converter respectively with the 1st 4 Signal-regulated kinase, 1st 4 analog-to-digital conversion module, filtering extraction module is connected, filtering extraction module and gps clock are connected with industrial computer respectively.The system is suitable to that urban geology engineering is passive reconnoitres, and structures the formation convenient, sensitivity is high.
Description
Technical field
The present invention relates to geophysical instrument and photoelectric sensor field, more particularly to a kind of natural face rolling land matter
Exploration system.
Background technology
It is the new physicses Detection Techniques that development gets up in recent years to carry out geological prospecting using face ripple, therefore in recent years,
Big surface wave exploration equipment is the focus of geophysical exploration equipment development area research.
Directly being constrained substantially using by region for geothermal energy resources (earth formation deep reaches 1000-3000 meters), is particularly in warp
The flourishing group of cities of Ji is widely used, but very big in group of cities area progress geothermal prospecting difficulty.Many groups of cities
Geothermal field belongs to basin type geothermal field, in region of no relief Quaternary cover area, and basement rock is without appearing, in group of cities, due to mankind's work
Industry activity causes various disturbing factors, conventional geophysical prospecting method is not normally carried out；Intensive building and limited in addition
The requirement of current condition and environmental protection also makes some important geophysical prospecting methods (such as artificial earthquake) be difficult to carry out.Non- earthquake physical prospecting side
The instrument (such as Canada V8, U.S. GDP32II) of method such as gravity, electromagnetic method etc. is not only expensive, in addition it is also necessary to artificial excitation's electricity
, it is still low using special measure surveying accuracy.
The early stage physics preliminry basic research drilled in group of cities is required and difficulty is larger.The amplitude of big surface wave is very
Small (micron dimension), using the small shock wave in earth surface ground at all times, (its composition is complex, includes face
The various compositions such as ripple, bulk wave, wherein face ripple-fine motion Rayleigh waves method account for Main Ingredients and Appearance) as object of observation, this method was both not required to
Bulky artificial energy source (artificial excitation's electric field and the seismic origin) is wanted, do not cause harm (such as noise or high pressure to environment for human survival
Electricity etc.), its measuring point is structured the formation flexibly in addition, is not limited by hard pavement and underground pipe network.
But, multichannel fine motion Rayleigh waves are obtained with traditional steady or moment face ripple instrument and there is unsurmountable larger mistake
Difference, its earthquake pickup electronic sensor is in this error source and to pick up ripple links sensitivity low and there is Phase synchronization mistake
Difference, Chinese invention patent publication number 102721983A discloses a kind of fiber array seabed pole-dipole arrays structure detection system, though
Photoelectric sensor so is employed, but the detection of fine motion Rayleigh waves method is limited the problems such as the circuit of its sensor construction, signal transacting
Scope, can only carry out the physical detecting of 200-500 meters of the shallow-layer on stratum.
The content of the invention
Observation is used as it is an object of the invention to provide a kind of small vibrations face ripple in ground at all times by the use of earth surface
Object, the natural face rolling land matter exploration system of deep (1000-3000 meters) physical detecting is carried out to stratum.
Therefore, technical scheme is as follows：
A kind of natural face rolling land matter exploration system, including single longitudinal mode laser, one-level coupler, the 1st and the 2nd two grade of coupling
The double single-mode fiber drums of device, 1-8 three-levels coupler, 1-4,1-4 Optical phase-locked loops, 1-4 optical-electrical converters, 1-4 letters
Number conditioning module, 1-4 filtering extractions module, industrial computer and gps clock.
The single longitudinal mode laser is connected with one-level coupler, the output of the one-level coupler and two diode couplers
It is connected, the output of two diode couplers is connected with the 1st, 3,5,7 three-level couplers respectively, the 1st and the 2nd three-level coupler and the
The three-level coupler of the 1 pair of single-mode fiber drum, the 3rd and the 4th and the three-level coupler of the 2nd pair of single-mode fiber drum, the 5th and the 6th and the 3rd
The three-level coupler of double single-mode fiber drums, the 7th and the 8th and the 4th pair of single-mode fiber drum respectively constitute the Mach-Zehnders of 1- the 4th
Your interference vibrating sensing module, produced interference-type vibrating sensing signal changes with light phase, respectively through the 2nd, 4,6,8 three-levels
Coupler is output to the 1-4 optical-electrical converters, the 1-4 optical-electrical converters respectively with 1-4 Signal-regulated kinases,
1-4 analog-to-digital conversion modules, filtering extraction module are sequentially connected, and the filtering extraction module is connected with the industrial computer.Institute
State gps clock to be connected with the industrial computer, for time precise synchronization.
Preferably, said system also includes 1-4 Optical phase-locked loops, and the 1-4 Optical phase-locked loops are connected on described respectively
In one arm of the double single-mode fiber drums of 1-4, interference signal is set to be stabilized in quadrature position.
Preferably, the single longitudinal mode laser is narrow linewidth longitudinal mode semiconductor laser；Preferably, the 1-
4 optical-electrical converters are the optical-electrical converter that dark current reaches pA grades；Described one-level, two grades, three-level coupler be 2*2 optical fiber couplings
Clutch.
Single longitudinal mode laser 1 is preferred to use narrow linewidth longitudinal mode semiconductor laser.
Beneficial effects of the present invention are as follows：
The exploration system of the present invention is lightweight, structure the formation convenient, have high sensitivity (Magnitude,
0.01g, amplitude 1550um/2), its noise is low, lightweight, strong interference immunity, and its high sensitivity and transducing signal can multichannels
With photon mode synchronous transfer, no phase error and reliable quick with passive mode can carry out deep in city to stratum
(1000-3000 meters) physical detecting, provides for the processing to fine motion Rayleigh waves signal and geological analysis and other types of picks up shake
Pick up the incomparable advantage of wave sensor.
Brief description of the drawings
Fig. 1 is the schematic diagram of the natural face rolling land matter exploration system of the present invention；
Fig. 2 is the layout drawing of the natural face rolling land matter exploration system of the present invention；
Fig. 3 is phase velocity-dispersion curve.
Wherein：
1st, longitudinal mode semiconductor laser 2, one-level coupler 3-1,3-2：Diode coupler；
4-1~4-8:Three-level coupler；5-1~5-4:Optical phase-locked loop；6-1~6-4:Double single-mode fiber drums
7-1~7-4：Optical-electrical converter；8-1~8-4：Signal-regulated kinase；
9-1~9-4：The △ of ∑ one changes modulus module；10th, filtering extraction module
11st, flat board industrial computer；12nd, gps clock.
Embodiment
The composition of the exploration system of the present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.
One embodiment of the present of invention shown in Figure 1.In figure, narrow linewidth longitudinal mode semiconductor laser 1 and one-level
Coupler 2 is connected, by coupler 2, and laser is divided into two-way output, output and diode coupler 3-1,3-2 of one-level coupler 2
It is connected.By diode coupler 3-1,3-2, laser is divided into four tunnels respectively while being output to three-level coupler 4-1,4-3,4-5,4-
7 one end.Three-level coupler 4-1,4-2 and double single-mode fiber drum 6-1 constitutes first Mach-Zehnder (M-Z) interference and shaken
Dynamic sensing module；Three-level coupler 4-3,4-4 and double single-mode fiber drum 6-2 constitutes second Mach-Zehnder (M-Z) interference
Vibrating sensing module；Three-level coupler 4-5,4-6 and double single-mode fiber drum 6-3 constitute the 3rd Mach-Zehnder (M-Z) and done
Relate to vibrating sensing module；Three-level coupler 4-7,4-8 and double single-mode fiber drum 6-4 constitute the 4th Mach-Zehnder (M-Z)
Interfere vibrating sensing module.Its interference-type vibrating sensing signal is changed with light phase, respectively through three-level coupler 4-2,4-4,4-
6th, 4-8 is output to optical-electrical converter 7-1,7-2,7-3 and 7-4 that dark current reaches pA grades.Dark current reaches pA grades of optical-electrical converter
7-1,7-2,7-3 and 7-4 respectively with Signal-regulated kinase 8-1,8-2,8-3,8-4 and ∑ one △ analog-to-digital conversion modules 9-1,9-
2nd, 9-3,9-4 are connected.△ analog-to-digital conversion modules 9-1,9-2,9-3, the 9-4 of ∑ one and filtering extraction module 10 are connected, filtering extraction
Module 10 is connected with flat board industrial computer 11 again, and gps clock 12 is also connected with industrial computer 11.
Wherein, Optical phase-locked loop 5-1,5-2,5-3,5-4 is connected on double single-mode fiber drum 6-1,6-2,6-3,6-4 respectively
In one arm, anti-polarization and anti-phase fading make interference signal be stabilized in quadrature position, to improve aforementioned four interference-type light
The sensitivity of fine vibrating sensor and stability.
The course of work of the exploration system of the present invention is as follows：
1st, according to Mach-Ze De (Mach-Zehnder) fiber optic interferometric vibrating sensor principle, with two-way, synchronously interference swashs
Light modulating signal on interferometer relative transport, interferometer both-end pick up light channel structure, by the use of common communications optical fiber as
The interfere arm and reference arm of interferometer, using vibration signal as detected amount, form highly sensitive vibration detecting sensor, real
When pick up vibration signal, have high sensitivity (Magnitude, 0.01g, amplitude 1550um/2).To the present invention's
Four Liriodendron chinese vibrating sensing modules structure the formation for：One be placed in an equilateral triangle center, the other three placement
In three vertex positions of equilateral triangle, the Liriodendron chinese vibrating sensing module radius r that structures the formation determines according to strata division depth
Fixed, structure the formation radius r relation of the depth of stratum h to be measured and sensing module is h=10r, if measurement stratum depth of seam division is
1200 meters, then r=120 meters, connected by optical fiber.
2nd, according to Fig. 2, four Liriodendron chinese vibrating sensing modules is structured the formation successively and worked as follows, cloth
Lattice point position is respectively 0,1,2,3 in figure；0、4、5、6；0th, 7,8,9, wherein 0 point of position is to 7,8, the distance of 9 points of positions be 120 meters.
3rd, apparatus of the present invention are opened, sensor-based system continuously picks up natural face ripple signal, this four roads signal difference input signal
Conditioning module 8-1,2,3,4, then 4 tunnels exported after the completion ∑ one △ A/D conversions of analog-to-digital conversion module 9-1,2,3,4
512kSPS code streams each independently give filtering extraction module 10, and 24,4 tunnel signal bit stream is lined up serial code and is output to by this module
Industrial computer 11.
The present invention can reach 4 signal Complete Synchronizations, completely same between A/D analog-to-digital conversion modules 9 and decimation filter 10
Step, synchronised clock is produced by filtering extraction module 10, and the sampled clock signal of decimation filter 10 is 2 in normal state
048k Hz half duty square wave.It inputs to A/D analog-to-digital conversion modules 9 parallel by decimation filter 100, it is therefore an objective to which control is more
Piece A/D analog-to-digital conversion modules 9, deliver to the bit code stream interfaces of one △ of ∑ mono- of decimation filter 10, the data of four-way are with for the moment
Carve.The data of synchronization are put into corresponding position through the filtered data of decimation filter 10 by synchronization.A/D moduluses turn
The filtering clock of the sampling clock and decimation filter 10 that change the mold block 9 is the same clock source locked with GPS 12.
Optical phase-locked loop 5-1,5-2,5-3,5-4 are connected on one of double single-mode fiber drum 6-1,6-2,6-3,6-4 respectively
In arm, anti-polarization and anti-phase fading make interference signal be stabilized in quadrature position, shaken with improving aforementioned four interference-type optical fiber
The sensitivity of dynamic sensor and stability.
4th, three four groups of data of above-mentioned measurement are passed through into signal condition and processing, digital quantity is in industrial control computer 11
Form spot database.
5th, Industry Control calculates machine 11 and carries out spatial autocorrelation processing to above-mentioned signalSpace is certainly
Correlation method mainly carries out face ripple extraction in time-domain, obtains the spatial autocorrelation system ρ of different frequency, this spatial autocorrelation coefficient
Really face wave frequency rate composition f and the function of space coordinate, that is to say, that it is not only relevant with frequency, the also position with geophone
It is equipped with pass.From form, actual measurement spatial autocorrelation curve should be similar to zero Bessel function curve, be asked for by it
" corrected value ", the phase velocity of each frequency can just be extracted by adding space coordinate parameters, phase velocity-frequency dispersion be drawn accordingly bent
Line, is shown in Fig. 3.
6th, from above-mentioned steps can be seen that fine motion in the face phase velocity of wave that obtains there is dispersion phenomenon, explanatorily under each layer
The velocity of wave of rock is uneven, then by Inversion Calculation, can obtain the wave speed distribution situation of different depth, pass through different lithology
The velocity of wave difference (Data Base of Chemical Compound) on stratum, so that it may deduce the underground distributed-hierarchical of various rock stratum, determine whether therein
The resources such as thermal source, mineral.
Claims (5)
1. a kind of natural face rolling land matter exploration system, it is characterised in that：Including single longitudinal mode laser, one-level coupler, the 1st and
The double single-mode fiber drums of 2 diode couplers, 1-8 three-levels coupler, 1-4,1-4 Optical phase-locked loops, 1-4 opto-electronic conversions
Device, 1-4 Signal-regulated kinases, 1-4 filtering extractions module, industrial computer and gps clock,
The single longitudinal mode laser is connected with one-level coupler, the output of the one-level coupler and two diode coupler phases
Even, the output of two diode couplers is connected with the 1st, 3,5,7 three-level couplers respectively, the 1st and the 2nd three-level coupler and the 1st
The three-level coupler of double single-mode fiber drums, the 3rd and the 4th and the three-level coupler of the 2nd pair of single-mode fiber drum, the 5th and the 6th and the 3rd
The three-level coupler of double single-mode fiber drums, the 7th and the 8th and the 4th pair of single-mode fiber drum respectively constitute the Mach-Zehnders of 1- the 4th
Your interference vibrating sensing module, produced interference-type vibrating sensing signal changes with light phase, respectively through the 2nd, 4,6,8 three-levels
Coupler is output to the 1-4 optical-electrical converters, the 1-4 optical-electrical converters respectively with 1-4 Signal-regulated kinases,
1-4 analog-to-digital conversion modules, filtering extraction module are sequentially connected, and the filtering extraction module is connected with the industrial computer, institute
Gps clock is stated to be connected with the industrial computer.
2. natural face rolling land matter exploration system according to claim 1, it is characterised in that：Also include 1-4 Optical phase-locked loops,
The 1-4 Optical phase-locked loops are connected in an arm of the double single-mode fiber drums of the 1-4 respectively, are stablized interference signal
In quadrature position.
3. natural face rolling land matter exploration system according to claim 1, it is characterised in that：The single longitudinal mode laser is narrow
Line width longitudinal mode semiconductor laser.
4. natural face rolling land matter exploration system according to claim 1, it is characterised in that：The 1-4 optical-electrical converters
PA grades of optical-electrical converter is reached for dark current.
5. the natural face rolling land matter exploration system according to any one of claim 1-4, it is characterised in that：Described one
Level, two grades, three-level coupler be 2*2 couplers.
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| CN201710266904.2A CN106980141B (en) | 2017-04-21 | 2017-04-21 | Natural surface wave geological exploration system |
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| CN201710266904.2A CN106980141B (en) | 2017-04-21 | 2017-04-21 | Natural surface wave geological exploration system |
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| CN106980141B CN106980141B (en) | 2023-06-20 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1862239A (en) * | 2006-06-15 | 2006-11-15 | 华中科技大学 | Distributed optical fiber vibration sensing method and apparatus thereof |
| FR2966926A1 (en) * | 2010-11-03 | 2012-05-04 | Ixsea | APOLARIZED INTERFEROMETRIC SYSTEM AND APOLARIZED INTERFEROMETRIC MEASUREMENT METHOD |
| CN103017887A (en) * | 2012-12-11 | 2013-04-03 | 中国船舶重工集团公司第七〇五研究所 | Optical fiber vibration sensing system and detection method thereof |
| WO2015030822A1 (en) * | 2013-08-30 | 2015-03-05 | Halliburton Energy Services, Inc. | Distributed acoustic sensing system with variable spatial resolution |
| CN104457961A (en) * | 2014-12-18 | 2015-03-25 | 天津理工大学 | Optical fiber sensing device measuring vibration waveform and vibration position simultaneously and sensing method thereof |
| CN206788383U (en) * | 2017-04-21 | 2017-12-22 | 南开大学 | Natural face rolling land matter exploration device |
-
2017
- 2017-04-21 CN CN201710266904.2A patent/CN106980141B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1862239A (en) * | 2006-06-15 | 2006-11-15 | 华中科技大学 | Distributed optical fiber vibration sensing method and apparatus thereof |
| FR2966926A1 (en) * | 2010-11-03 | 2012-05-04 | Ixsea | APOLARIZED INTERFEROMETRIC SYSTEM AND APOLARIZED INTERFEROMETRIC MEASUREMENT METHOD |
| CN103017887A (en) * | 2012-12-11 | 2013-04-03 | 中国船舶重工集团公司第七〇五研究所 | Optical fiber vibration sensing system and detection method thereof |
| WO2015030822A1 (en) * | 2013-08-30 | 2015-03-05 | Halliburton Energy Services, Inc. | Distributed acoustic sensing system with variable spatial resolution |
| CN104457961A (en) * | 2014-12-18 | 2015-03-25 | 天津理工大学 | Optical fiber sensing device measuring vibration waveform and vibration position simultaneously and sensing method thereof |
| CN206788383U (en) * | 2017-04-21 | 2017-12-22 | 南开大学 | Natural face rolling land matter exploration device |
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