CN208060051U - A kind of fiber grating earth pressure sensor - Google Patents
A kind of fiber grating earth pressure sensor Download PDFInfo
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- CN208060051U CN208060051U CN201820200448.1U CN201820200448U CN208060051U CN 208060051 U CN208060051 U CN 208060051U CN 201820200448 U CN201820200448 U CN 201820200448U CN 208060051 U CN208060051 U CN 208060051U
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Abstract
The utility model discloses a kind of fiber grating earth pressure sensors, including cylinder body and the beam of uniform strength, the top of cylinder body is equipped with pressure difference bellows, the lower part of pressure difference bellows is fixed with mandril, one end of mandril is connected with the beam of uniform strength vertically downward, strain fiber grating is pasted on the beam of uniform strength, strain fiber grating passes through the plug being arranged on cylinder side wall to be connected with optical signal prevention device, and strains fiber grating and connected with the fiber-optical grating temperature sensor that a free state does not stress by optical fiber；The utility model strains the setting of fiber grating by being pasted on intensity beam, so that pressure difference bellows is after bearing pressure, the active force can be applied to the cantilever end of the beam of uniform strength by mandril, the beam of uniform strength is deformed, cause the strain for straining fiber grating, it is transmitted to analyzing processing in optical signal prevention device through optical fiber, to obtain the numerical value of soil pressure, increases a kind of sensitivity of fiber grating earth pressure sensor of the utility model.
Description
Technical field
The utility model is related to soil pressure sensor, specially a kind of fiber grating earth pressure sensor.
Background technology
" soil pressure " refers mainly to soil body side suffered by soil-baffling structure (retaining wall, abutment, harbour sheet pile wall, foundation pit guard wall etc.)
Pressure.Under interaction of the soil with structure, the total value of lateral pressure suffered by soil-baffling structure, with the side of structure and native relative displacement
Change to displacement, the distribution of lateral pressure then changes with the difference of the plastic deformation of structure and operational procedure.Soil pressure
Power meter be then used exclusively for measure soil pressure sensor, be mainly used for measure the earthwork and dykes and dams gross pressure, concrete or
The soil pressure of steel construction and soil body contact surface, the soil pressure etc. on retaining wall, is widely used in building, water power, dam, tunnel etc.
Engineering field.
Currently, the slave sensing principle of existing earth pressure gauge is broadly divided into the market：Type vibration wire, pneumatic type, resistance-strain
Formula and fiber Bragg grating type.It wherein mainly is calculated as leading with type vibration wire soil pressure, performance is stablized, and use scope is wide, high sensitivity, temperature
Influence small, but long-time stability difference has creep, easily by electromagnetic interference, but it is inflammable and explosive, strong electromagnetic severe at some
Environment and the occasion that need to be detected at a distance, these are using electricity as being difficult to use in terms of the soil pressure of transducing signal.Optical fiber light
Grid soil pressure meter is a kind of novel optical fiber displacement sensor that can form sensing network system, many excellent with fibre optical sensor
Point, most important one are exactly that the transducing signal of fiber-optic grating sensor is modulated for wavelength, this sensor mechanism is advantageous in that：
(1) measuring signal is not influenced by factors such as light source fluctuating, bending loss of optical fiber, junction loss and detector agings；(2) it avoids
Phase measurement unintelligible and intrinsic reference point is needed in general interferometric sensor；(3) a point multiplexing can easily be used
Technology concatenates multiple fiber gratings in an optical fiber and carries out distribution measurings, but existing fiber-optic grating sensor sensitivity
Not enough, the variation of soil pressure pressure-bearing numerical value can not quickly be incuded.The utility model is deposited according to existing fiber-optic grating sensor
The problem of, it is proposed that one kind has a high sensitivity, compact-sized simple, easy for installation fiber grating earth pressure sensor,
Meanwhile the fiber grating earth pressure sensor also has anticorrosive, electromagnetism interference, durability is strong, and reliability is high, is easy to form
The features such as network.
Utility model content
The technical problems to be solved in the utility model is to overcome the deficiencies of existing technologies, and provides a kind of optical fiber grating soil pressure
Sensor, to solve the above problems.
In order to solve the above-mentioned technical problem, the utility model provides the following technical solution：
The utility model provides a kind of fiber grating earth pressure sensor, including cylinder body and the beam of uniform strength, the top of cylinder body
Pressure difference bellows is installed, the lower part of pressure difference bellows is fixed with mandril, and one end of mandril is connected with the beam of uniform strength vertically downward, etc.
Intensity beam is mounted by means of bolts in the inner bottom surface of cylinder body, and strain fiber grating is pasted on the beam of uniform strength, answers darkening
Fine grating passes through the plug being arranged on cylinder side wall to be connected with optical signal prevention device, and strains fiber grating and pass through light
The fiber-optical grating temperature sensor that fibre does not stress with a free state is connected.
As a kind of optimal technical scheme of the utility model, the beam of uniform strength is fixedly mounted on cylinder body in cantilevered fashion
In inner bottom surface.
As a kind of optimal technical scheme of the utility model, the beam of uniform strength for flexible metal material makes and
At cylinder body is made by anticorrosion material.
As a kind of optimal technical scheme of the utility model, the top of plug is provided with sealing ring.
The advantageous effect that the utility model is reached is：
1, the utility model strains the setting of fiber grating by being pasted on intensity beam so that pressure difference bellows is bearing to press
After power, which can be applied to the cantilever end of the beam of uniform strength by mandril, the beam of uniform strength is deformed, causes to answer darkening
The strain of fine grating, the strain for straining fiber grating are transmitted in optical signal prevention device through optical fiber and carry out analyzing processing,
To obtain the numerical value of soil pressure, a kind of sensitivity of fiber grating earth pressure sensor of the utility model is increased.
2, the utility model is influenced by the fiber-optical grating temperature sensor of setting caused by changing to compensation temperature,
Reduce error existing for the soil pressure numerical value that fiber grating earth pressure sensor calculates.
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；
Figure label：1, cylinder body；2, the beam of uniform strength；3, pressure difference bellows；4, mandril；5, bolt；6, fiber grating is strained；7,
Plug；8, optical signal prevention device；9, fiber-optical grating temperature sensor；10, sealing ring.
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 Figure 1, the utility model provides a kind of fiber grating earth pressure sensor, including cylinder body 1 and wait
The top of intensity beam 2, cylinder body 1 is equipped with pressure difference bellows 3, and the lower part of pressure difference bellows 3 is fixed with mandril 4, and one end of mandril 4 is vertical
It is connected with the beam of uniform strength 2 downwards so that the active force can be applied to by pressure difference bellows 3 after bearing pressure by mandril 4
The cantilever end of the beam of uniform strength 2, the beam of uniform strength 2 are deformed, and the strain for straining fiber grating 6, strain fiber grating 6 is caused to be answered
Become to be transmitted in optical signal prevention device 8 through optical fiber and carry out analyzing processing, to obtain the numerical value of soil pressure, increases this
A kind of sensitivity of fiber grating earth pressure sensor of utility model；The beam of uniform strength 2 is fixedly mounted on cylinder body 1 by bolt 5
In inner bottom surface, it is pasted with strain fiber grating 6 on the beam of uniform strength 2, avoids strain fiber grating 6 and is directly connect with dielectric material
Chirp, phenomena such as thermal stability is poor, improve packaging technology caused by touching；Strain fiber grating 6 passes through to be set on 1 side wall of cylinder body
The plug 7 set is connected with optical signal prevention device 8, is capable of the strain of analyzing processing strain fiber grating 6, to obtain
The numerical value of soil pressure；And strain the fiber-optical grating temperature sensor 9 that fiber grating 6 is not stressed by optical fiber and a free state
Series connection influences caused by changing to compensation temperature, reduces the soil pressure numerical value that fiber grating earth pressure sensor calculates and deposits
Error.
The beam of uniform strength 2 is fixedly mounted in cantilevered fashion in the inner bottom surface of cylinder body 1, can be received by mandril 4
Soil pressure on pressure difference bellows 3.
The beam of uniform strength 2 is that flexible metal material is made, in the soil pressure on receiving pressure difference bellows 3,
Deformation can be generated, the wavelength with dynamic strain fiber grating 6 changes；Cylinder body 1 is made by anticorrosion material, is had
Erosion-resisting advantage.
The top of plug 7 is provided with sealing ring 10, and 1 inside of cylinder body is enabled to form a sealed environment.
Specifically：The active force can be applied to the beam of uniform strength 2 by pressure difference bellows 3 after bearing pressure by mandril 4
Cantilever end so that the beam of uniform strength 2 is deformed, and causes the strain for straining fiber grating 6, strains the strain of fiber grating 6 through light
Fibre is transmitted in optical signal prevention device 8 by plug 7 and carries out analyzing processing, to obtain the numerical value of soil pressure.
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 (4)
1. a kind of fiber grating earth pressure sensor, which is characterized in that including cylinder body (1) and the beam of uniform strength (2), cylinder body (1)
Top is equipped with pressure difference bellows (3), and the lower part of pressure difference bellows (3) is fixed with mandril (4), one end of mandril (4) vertically downward with
The beam of uniform strength (2) is connected, and the beam of uniform strength (2) is fixedly mounted on by bolt (5) in the inner bottom surface of cylinder body (1), equal strength
Be pasted with strain fiber grating (6) on beam (2), strain fiber grating (6) pass through on cylinder body (1) side wall the plug (7) that is arranged with
Optical signal prevention device (8) is connected, and strains the light that fiber grating (6) is not stressed by optical fiber and a free state
Fine grating temperature sensor (9) series connection.
2. a kind of fiber grating earth pressure sensor according to claim 1, which is characterized in that the beam of uniform strength (2) is with outstanding
The form of arm is fixedly mounted in the inner bottom surface of cylinder body (1).
3. a kind of fiber grating earth pressure sensor according to claim 1, which is characterized in that the beam of uniform strength (2) is tool
Flexible metal material is made, and cylinder body (1) is made by anticorrosion material.
4. a kind of fiber grating earth pressure sensor according to claim 1, which is characterized in that the top of plug (7) is set
It is equipped with sealing ring (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820200448.1U CN208060051U (en) | 2018-02-06 | 2018-02-06 | A kind of fiber grating earth pressure sensor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820200448.1U CN208060051U (en) | 2018-02-06 | 2018-02-06 | A kind of fiber grating earth pressure sensor |
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| CN208060051U true CN208060051U (en) | 2018-11-06 |
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| CN201820200448.1U Active CN208060051U (en) | 2018-02-06 | 2018-02-06 | A kind of fiber grating earth pressure sensor |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108760109A (en) * | 2018-03-22 | 2018-11-06 | 湖北省路桥集团有限公司 | The soil pressure measuring device and method of changeable fluid based on bragg grating |
| CN109489896A (en) * | 2018-12-03 | 2019-03-19 | 江西洪都航空工业集团有限责任公司 | The small horizontal pressure metering device of force value dynamometer |
| CN110044541A (en) * | 2019-05-27 | 2019-07-23 | 西安石油大学 | A kind of fiber bragg grating pressure sensor based on rectangular diaphragm |
| CN110108340A (en) * | 2019-06-04 | 2019-08-09 | 西北铁道电子股份有限公司 | A kind of automobile dynamically weighing device |
| CN110473387A (en) * | 2019-09-12 | 2019-11-19 | 西南石油大学 | A kind of mountainous region pipeline landslide Geological Hazards Monitoring early warning system and method |
| CN111562041A (en) * | 2020-04-22 | 2020-08-21 | 江苏法尔胜光电科技有限公司 | Fiber bragg grating pressure sensor for four-corner pressurized optical fiber grinding machine |
| CN113008424A (en) * | 2021-02-26 | 2021-06-22 | 武汉理工大学 | Variable-range fiber grating pressure sensor based on fused deposition technology |
| CN113137928A (en) * | 2020-12-10 | 2021-07-20 | 中铁二院工程集团有限责任公司 | Deep rock-soil body optical fiber inclination measuring system based on optical frequency domain reflection technology |
| CN113340487A (en) * | 2021-07-12 | 2021-09-03 | 西南交通大学 | Earth pressure cell |
| CN115683443A (en) * | 2022-11-04 | 2023-02-03 | 北京精诚恒创科技有限公司 | Pressure sensor based on fiber bragg grating and pressure detection method |
-
2018
- 2018-02-06 CN CN201820200448.1U patent/CN208060051U/en active Active
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108760109A (en) * | 2018-03-22 | 2018-11-06 | 湖北省路桥集团有限公司 | The soil pressure measuring device and method of changeable fluid based on bragg grating |
| CN109489896A (en) * | 2018-12-03 | 2019-03-19 | 江西洪都航空工业集团有限责任公司 | The small horizontal pressure metering device of force value dynamometer |
| CN110044541A (en) * | 2019-05-27 | 2019-07-23 | 西安石油大学 | A kind of fiber bragg grating pressure sensor based on rectangular diaphragm |
| CN110108340A (en) * | 2019-06-04 | 2019-08-09 | 西北铁道电子股份有限公司 | A kind of automobile dynamically weighing device |
| CN110108340B (en) * | 2019-06-04 | 2024-03-22 | 西北铁道电子股份有限公司 | Dynamic weighing device for automobile |
| CN110473387A (en) * | 2019-09-12 | 2019-11-19 | 西南石油大学 | A kind of mountainous region pipeline landslide Geological Hazards Monitoring early warning system and method |
| CN111562041A (en) * | 2020-04-22 | 2020-08-21 | 江苏法尔胜光电科技有限公司 | Fiber bragg grating pressure sensor for four-corner pressurized optical fiber grinding machine |
| CN113137928B (en) * | 2020-12-10 | 2024-01-19 | 中铁二院工程集团有限责任公司 | Deep rock-soil body optical fiber inclinometry system based on optical frequency domain reflection technology |
| CN113137928A (en) * | 2020-12-10 | 2021-07-20 | 中铁二院工程集团有限责任公司 | Deep rock-soil body optical fiber inclination measuring system based on optical frequency domain reflection technology |
| CN113008424A (en) * | 2021-02-26 | 2021-06-22 | 武汉理工大学 | Variable-range fiber grating pressure sensor based on fused deposition technology |
| CN113340487A (en) * | 2021-07-12 | 2021-09-03 | 西南交通大学 | Earth pressure cell |
| CN115683443B (en) * | 2022-11-04 | 2023-09-19 | 北京精诚恒创科技有限公司 | Pressure sensor based on fiber bragg grating and pressure detection method |
| CN115683443A (en) * | 2022-11-04 | 2023-02-03 | 北京精诚恒创科技有限公司 | Pressure sensor based on fiber bragg grating and pressure detection method |
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