CN208060070U - A kind of civil engineering fiber grating pore water pressure test system - Google Patents
A kind of civil engineering fiber grating pore water pressure test system Download PDFInfo
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- CN208060070U CN208060070U CN201820200446.2U CN201820200446U CN208060070U CN 208060070 U CN208060070 U CN 208060070U CN 201820200446 U CN201820200446 U CN 201820200446U CN 208060070 U CN208060070 U CN 208060070U
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- fiber
- fiber grating
- grating
- transmission cable
- pore water
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- Testing Or Calibration Of Command Recording Devices (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
The utility model discloses a kind of civil engineering fiber grating pore water pressures to test system,Including ventage piezometer,Fiber grating reconciles instrument and computer,Ventage piezometer,Fiber grating is reconciled to be connected by transmission cable between instrument and computer,Ventage piezometer outer wall is provided with tube body,Tubular body one end is fixed with mounting base by mounting hole,Baffle pipe is welded in mounting base,Baffle pipe one end is connected with fixed seat by disposed thread,Fixed seat side is provided with rubber plug,Gasket is closely connected between fixed seat and rubber plug,Gasket inner face is equipped with perforated bolt,Transmission cable runs through baffle pipe and perforated bolt,Pressure fiber-optic grating sensor and Temperature fiber Grating Sensor are connected with by optical fiber on transmission cable,The utility model this system uses the ventage piezometer of high-precision high range,The networking of transmission cable and fiber Bragg grating (FBG) demodulator,Realize the real-time acquisition of pore water pressure,It can solve the problems, such as networking.
Description
Technical field
The utility model is related to fiber-optic grating sensor comprehensive application technology and pore water pressure fields of measurement field, espespecially one
Kind civil engineering tests system with fiber grating pore water pressure.
Background technology
In the safety monitoring of the engineering fields such as tunnel, dykes and dams, subway, coal mine and oil field, one of project being most difficult to is exactly
The position of blowby area is reliably determined, seepage flow (leakage) position and flow is only fast and accurately verified, can just take
The strick precaution of effect and reclamation activities, so seepage flow positioning and the monitoring of seepage discharge quantification are significant.
Currently, more accurate seepage flow detection means mainly has 2 kinds of methods：It detects osmotic pressure or detection seepage flow (M) is measured.It oozes
Seepage flow total amount in the typically wide range of flow monitoring, makees vadose region positioning with it, ineffective.The monitoring of osmotic pressure
Osmotic pressure mainly then is observed using pressure-measuring pipe and osmometer, since the precision of sensor is higher, monitoring more accurately may be used
It leans on.And the measurer currently used for measuring Fluid pressure, pore water pressure is electronic sensor, engineering practice shows such osmotic pressure
Meter volume is big, there are anti-lightning poor performance, the defects that electromagnetism interference performance is poor, measurement distance is closer for itself, therefore causes reliable
The problem that property is poor, measurement range is small, measurement accuracy is not high, seriously limits their extensive use.
Utility model content
The technical problems to be solved in the utility model is that it is high, applicable to provide a kind of accuracy the shortcomings that overcoming the prior art
The wide civil engineering of range tests system with fiber grating pore water pressure.
In order to solve the above-mentioned technical problem, the utility model provides the following technical solution：A kind of soil of the utility model
Wood engineering tests system with fiber grating pore water pressure, including ventage piezometer, fiber grating reconcile instrument and computer, pore water
Pressure meter, fiber grating are reconciled to be connected by transmission cable between instrument and computer, and ventage piezometer outer wall is provided with tube body, pipe
Internal portion one end is fixed with mounting base by mounting hole, baffle pipe is welded in mounting base, baffle pipe one end passes through disposed thread
It is connected with fixed seat, fixed seat side is provided with rubber plug, and gasket, gasket are closely connected between fixed seat and rubber plug
Inner face is equipped with perforated bolt, and transmission cable is connected with pressure on baffle pipe and perforated bolt, transmission cable by optical fiber
Power fiber-optic grating sensor and Temperature fiber Grating Sensor.
As a kind of optimal technical scheme of the utility model, pressure fiber-optic grating sensor is provided with several, and defeated
Outlet is connected to by stretching out fiber grating on transmission cable, and multiple fiber gratings are concatenated in a transmission cable and are divided
Cloth measures, and realizes networking test.
As a kind of optimal technical scheme of the utility model, pressure fiber-optic grating sensor and optical fiber temperature grating sensing
The sensor base of device is all made of elastic epoxy resin and is made, and shell is all made of low-shrinkage, the adhesive of high shear strength
Cured technique is made, and solidfied material is in high resiliency state, flexibility is fabulous, elasticity modulus is low, elongation percentage is greatly up to 250%；Planted agent
Power is minimum, adhesive property is good as sensing substrate, aims at and accurately measures in fully saturated or fractional saturation soil and rock
Aperture hydraulic pressure and design；And several pressure fiber-optic grating sensors can be used for temperature self-compensation, improve measuring accuracy, and sense
Device stability is good.
As a kind of optimal technical scheme of the utility model, tube surfaces have been equidistantly positioned several micropores, can be with
Ensure that the hydraulic pressure in each orientation is consistent, is conducive to obtain correct test result.
As a kind of optimal technical scheme of the utility model, the input terminal that fiber grating reconciles instrument is connected by transmission cable
Several ventage piezometers are connected to, and fiber grating reconciles and connects display screen by internal circuit board on instrument, using flexible is suitble to
In a variety of measurements such as strain, temperature, pressure, multiple sensors can be accessed on an optical fiber.
The advantageous effect that the utility model is reached is：The utility model is a kind of civil engineering fiber grating pore water
Test system, this system is pressed to use the networking of the ventage piezometer, transmission cable and fiber Bragg grating (FBG) demodulator of high-precision high range,
The real-time acquisition for realizing pore water pressure under the premise of the measuring accuracy for ensureing sensing testing system, can solve the problems, such as networking；
Prevent the influence of interference；Anti-lightning；It being capable of long-term stable operation；Improve range, sensitivity and the accuracy of osmometer；It is suitable for
Various applications in civil engineering environment.It is anti-interference, anti-lightning strike can networking fiber grating pore water pressure test system reality may be implemented
When test, reduce the cost of manual inspection, improve the working efficiency of monitoring.And fiber grating reconciles instrument design intuitively, operation side
Just, software function is strong；Built-in high power, low noise scan laser；Internal wavelength refers to, without calibration；Has spectrum analysis
Instrument function；Battery powered is suitble to field work；Tool data show and store function；Using flexible, be suitable for strain, temperature,
A variety of measurements such as pressure can access multiple sensors on an optical fiber.
Description of the drawings
Attached drawing is used to provide a further understanding of the present invention, and a part for constitution instruction, with this practicality
Novel embodiment for explaining the utility model, does not constitute limitations of the present invention together.
In the accompanying drawings：
Fig. 1 is the utility model overall structure diagram；
Fig. 2 is the utility model ventage piezometer internal structure schematic diagram.
Figure label：1, ventage piezometer；2, fiber grating reconciles instrument；3, computer；4, micropore；5, tube body；6, it transmits
Optical cable；7, baffle pipe；8, pressure fiber-optic grating sensor；9, fixed seat；10, gasket；11, perforated bolt；12, rubber plug；
13, Temperature fiber Grating Sensor；14, mounting hole；15, mounting base.
Specific implementation mode
The preferred embodiment of the utility model is illustrated below in conjunction with attached drawing, it should be understood that described herein excellent
It selects embodiment to be only used for describing and explaining the present invention, is not used to limit the utility model.
In the description of the present invention, it should be noted that the instructions such as term "vertical", "upper", "lower", "horizontal"
Orientation or positional relationship is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of description the utility model and simplification
Description, does not indicate or imply the indicated device or element must have a particular orientation, with specific azimuth configuration and behaviour
Make, therefore should not be understood as limiting the present invention.
In the description of the present invention, it should also be noted that, unless otherwise clearly defined and limited, term " is set
Set ", " installation ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection,
Or it is integrally connected；It can be mechanical connection, can also be electrical connection；It can be directly connected, intermediary can also be passed through
It is indirectly connected, can be the connection inside two elements.It for the ordinary skill in the art, can be according to specific feelings
Condition understands the concrete meaning of above-mentioned term in the present invention.
Embodiment：As shown in Figs. 1-2, the utility model provides a kind of civil engineering fiber grating pore water pressure test system
System, including ventage piezometer 1, fiber grating reconcile instrument 2 and computer 3, and ventage piezometer 1, fiber grating are reconciled instrument 2 and calculated
It is connected by transmission cable 6 between machine 3,1 outer wall of ventage piezometer is provided with tube body 5, and 5 inside one end of tube body passes through mounting hole
14 are fixed with mounting base 15, and baffle pipe 7 is welded in mounting base 15, and 7 one end of baffle pipe is connected with fixed seat by disposed thread
9,9 side of fixed seat is provided with rubber plug 12, and gasket 10, gasket 10 are closely connected between fixed seat 9 and rubber plug 12
Inner face is equipped with perforated bolt 11, and transmission cable 6 runs through baffle pipe 7 and perforated bolt 11, connected by optical fiber on transmission cable 6
It is connected to pressure fiber-optic grating sensor 8 and Temperature fiber Grating Sensor 13.
Pressure fiber-optic grating sensor 8 is provided with several, and output end is connected to transmission by stretching out fiber grating
On optical cable 6, multiple fiber gratings are concatenated in a transmission cable 8 and carry out distribution measuring, realize networking test, pressure optical fiber light
The sensor base of gate sensor 8 and Temperature fiber Grating Sensor 13 is all made of elastic epoxy resin and is made, and shell is adopted
It is made of the cured technique of adhesive of low-shrinkage, high shear strength, solidfied material is in high resiliency state, flexibility is fabulous, bullet
Property modulus is low, elongation percentage is greatly up to 250%；Internal stress is minimum, adhesive property is good as sensing substrate, aims at accurate measure and satisfies completely
With or fractional saturation soil and rock in aperture hydraulic pressure and design；And several pressure fiber-optic grating sensors 8 can be used for
Temperature self-compensation improves measuring accuracy, and sensor stability is good, and 5 surface of tube body has been equidistantly positioned several micropores 4, can
Hydraulic pressure to ensure each orientation is consistent, is conducive to show that correct test result, the input terminal that fiber grating reconciles instrument 2 pass through
Transmission cable 6 is connected with several ventage piezometers 1, and fiber grating reconciles and connects display screen by internal circuit board on instrument 2,
Using flexible is suitable for a variety of measurements such as strain, temperature, pressure, and multiple sensors can be accessed on an optical fiber.
Operation principle：A kind of civil engineering of the utility model is tested system with fiber grating pore water pressure and will be fixed first
Seat 9 is flexibly connected with baffle pipe 7 by disposed thread, rubber plug 12 is put into the groove at 9 center of fixed seat, rubber plug
Gasket 10 is placed on 12 top, then, perforated bolt 11 is connected in the center rotating of fixed seat 9, by the axial pressure of rubber plug 12
Contracting, realizes that it is radially expanded, transmission cable 6 is squeezed, limit its axial movement, therefore, pressure fiber-optic grating sensor 8 and temperature
Degree fiber-optic grating sensor 13 is reliably stably mounted to inside baffle pipe 7.It, will be between several ventage piezometers 1 when work
It is laterally embedded at a certain distance under institute road surface to be tested, the water in road surface enters through the micropore 4 on tube body 5 in tube body 5, water pair
7 surface of baffle pipe generates pressure, and baffle pipe 7 transfers the pressure on pressure fiber-optic grating sensor 8, pressure optical fiber grating sensing
Device 5 and Temperature fiber Grating Sensor 8 pass the signal along to external fiber grating by transmission cable 6 and reconcile instrument 2, temperature light
Fiber grating sensor 8, which is used for compensation pressure fiber-optic grating sensor 5, the influence that temperature change is brought, and is reconciled by fiber grating
The processing of 2 prevention device analysis of instrument, then signal is transferred to computer by transmission cable 6, obtain dynamic pore water pressure pair
Structure function size in roadbed, in order to which timely road pavement makes corresponding maintenance measure.
Finally it should be noted that：The preferred embodiment that these are only the utility model, is not limited to this practicality
It is novel, although the utility model is described in detail with reference to the foregoing embodiments, for those skilled in the art,
It still can be with technical scheme described in the above embodiments is modified, or is carried out to which part technical characteristic etc.
With replacement.Within the spirit and principle of the utility model, any modification, equivalent replacement, improvement and so on should all include
It is within the protection scope of the utility model.
Claims (5)
1. a kind of civil engineering tests system with fiber grating pore water pressure, which is characterized in that including ventage piezometer (1), light
Fine grating reconciles instrument (2) and computer (3), and ventage piezometer (1), fiber grating are reconciled logical between instrument (2) and computer (3)
Transmission cable (6) connection is crossed, ventage piezometer (1) outer wall is provided with tube body (5), and the internal one end of tube body (5) passes through mounting hole
(14) it is fixed with mounting base (15), baffle pipe (7) is welded in mounting base (15), baffle pipe (7) one end is connected by disposed thread
It is connected to fixed seat (9), fixed seat (9) side is provided with rubber plug (12), close between fixed seat (9) and rubber plug (12)
It is connected with gasket (10), gasket (10) inner face is equipped with perforated bolt (11), and transmission cable (6) is through baffle pipe (7) and wears
Hole bolt (11) is connected with pressure fiber-optic grating sensor (8) and optical fiber temperature grating sensing on transmission cable (6) by optical fiber
Device (13).
2. a kind of civil engineering according to claim 1 tests system with fiber grating pore water pressure, which is characterized in that pressure
Power fiber-optic grating sensor (8) is provided with several, and output end is connected to transmission cable (6) by stretching out fiber grating
On.
3. a kind of civil engineering according to claim 1 tests system with fiber grating pore water pressure, which is characterized in that pressure
The sensor base of power fiber-optic grating sensor (8) and Temperature fiber Grating Sensor (13) is all made of elastic epoxy resin system
At.
4. a kind of civil engineering according to claim 1 tests system with fiber grating pore water pressure, which is characterized in that pipe
Body (5) surface has been equidistantly positioned several micropores (4).
5. a kind of civil engineering according to claim 1 tests system with fiber grating pore water pressure, which is characterized in that light
The input terminal that fine grating reconciles instrument (2) is connected with several ventage piezometers (1), and fiber grating tune by transmission cable (6)
Display screen is connected by internal circuit board on Xie Yi (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820200446.2U CN208060070U (en) | 2018-02-06 | 2018-02-06 | A kind of civil engineering fiber grating pore water pressure test system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820200446.2U CN208060070U (en) | 2018-02-06 | 2018-02-06 | A kind of civil engineering fiber grating pore water pressure test system |
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| Publication Number | Publication Date |
|---|---|
| CN208060070U true CN208060070U (en) | 2018-11-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820200446.2U Expired - Fee Related CN208060070U (en) | 2018-02-06 | 2018-02-06 | A kind of civil engineering fiber grating pore water pressure test system |
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| Country | Link |
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| CN (1) | CN208060070U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112198071A (en) * | 2020-10-20 | 2021-01-08 | 东北石油大学 | Electric pulse rock breaking experimental device capable of testing temperature stress of rock |
-
2018
- 2018-02-06 CN CN201820200446.2U patent/CN208060070U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112198071A (en) * | 2020-10-20 | 2021-01-08 | 东北石油大学 | Electric pulse rock breaking experimental device capable of testing temperature stress of rock |
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
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Granted publication date: 20181106 |