CN102768035A - Cup type optical fiber Bragg grating settlement meter and method of application for settlement meter - Google Patents
Cup type optical fiber Bragg grating settlement meter and method of application for settlement meter Download PDFInfo
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- CN102768035A CN102768035A CN2012102487215A CN201210248721A CN102768035A CN 102768035 A CN102768035 A CN 102768035A CN 2012102487215 A CN2012102487215 A CN 2012102487215A CN 201210248721 A CN201210248721 A CN 201210248721A CN 102768035 A CN102768035 A CN 102768035A
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- 239000013307 optical fiber Substances 0.000 title claims abstract description 89
- 238000000034 method Methods 0.000 title claims abstract description 24
- 239000007788 liquid Substances 0.000 claims abstract description 71
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 32
- 238000004062 sedimentation Methods 0.000 claims description 15
- 239000000463 material Substances 0.000 claims description 13
- 239000002184 metal Substances 0.000 claims description 10
- 230000005540 biological transmission Effects 0.000 claims description 9
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims 1
- -1 spherical container Substances 0.000 claims 1
- 238000005259 measurement Methods 0.000 abstract description 7
- 238000012545 processing Methods 0.000 abstract description 2
- 230000003287 optical effect Effects 0.000 abstract 1
- 239000000835 fiber Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 230000004044 response Effects 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000013178 mathematical model Methods 0.000 description 2
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- 238000006467 substitution reaction Methods 0.000 description 2
- NAWXUBYGYWOOIX-SFHVURJKSA-N (2s)-2-[[4-[2-(2,4-diaminoquinazolin-6-yl)ethyl]benzoyl]amino]-4-methylidenepentanedioic acid Chemical compound C1=CC2=NC(N)=NC(N)=C2C=C1CCC1=CC=C(C(=O)N[C@@H](CC(=C)C(O)=O)C(O)=O)C=C1 NAWXUBYGYWOOIX-SFHVURJKSA-N 0.000 description 1
- 235000008331 Pinus X rigitaeda Nutrition 0.000 description 1
- 235000011613 Pinus brutia Nutrition 0.000 description 1
- 241000018646 Pinus brutia Species 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
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- 230000000903 blocking effect Effects 0.000 description 1
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- 230000009467 reduction Effects 0.000 description 1
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- 238000007789 sealing Methods 0.000 description 1
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Abstract
The invention relates to a cup type optical fiber Bragg grating settlement meter and a method of application for the settlement meter, belonging to the technical field of optical electronic measurement devices. According to the invention, water is filled inside a cuboid container and a spherical container, the containers are filled with water, and the cuboid container is communicated with the spherical container through a coiled pipe so as to form a sealed container; a cavity is formed among the coiled pipe, an internal housing and an external housing of the spherical container, and optical fiber is led out from the cavity; and a grating liquid level sensor I and an optical fiber Bragg grating liquid level sensor II in the same structure are respectively arranged in the cuboid container and the spherical container, and connected with an external signal processing device through the optical fiber. According to the invention, atmosphere pressure on the settlement observation is offset with a differential pressure method, and measurement accuracy is improved; and due to a difference of a sensing grating responsive to temperature and pressure, therefore, temperature and a liquid level can be simultaneously achieved to be measured, and compensation to interference of the temperature fluctuation can be realized.
Description
Technical field
The present invention relates to a kind of water tumbler formula optical fiber Bragg raster sedimentometer and method of application thereof, belong to the photoelectron field of measuring technique.
Background technology
Ground settlement is claimed sinking of ground or earth subsidence again, is meant the phenomenon of the day water plane reduction that in certain surface area, is taken place.Ground settlement will cause the breaking-up of buildings and production facility, and therefore, for guaranteeing the safe operation of engineering, supervision construction quality and prevention engineering accident need skyscraper is carried out settlement measurement.The ground settlement view is the equipment that a kind of elevation change according to periodic measurement deflection working point calculates the ground settlement amount, can be used in the ground settlement observation of engineerings such as dykes and dams, highway, railway, reinforcing soft foundation.Water-pipe type settlement instrument utilizes gas outlet to guarantee that air pressure and external atmosphere pressure in the pipeline balance each other; This gas outlet easy blocking causes the increase of measuring error, and degree of accuracy can not get guaranteeing; And seriously be subject to human factor and weather condition (among Lee, Li Jie, Zheng Shuihua; " some innovative approach of water-pipe type settlement instrument " " water power robotization and dam monitoring ", 2010 12 monthly magazines, the 6th phase the 34th volume).
Summary of the invention
To the problems referred to above; A kind of water tumbler formula of the present invention optical fiber Bragg raster sedimentometer and method of application thereof; Adopt optical fiber Bragg grating sensor and linker to combine the sedimentation of Measurement of Dam contour level building; Utilize differential pressure method, balance out the influence of atmospheric pressure, improved measuring accuracy settlement observation; Utilization is pasted on the otherness of the sensing grating on the upper and lower surface of equi intensity cantilever to the temperature and pressure response, measures when can realize temperature and liquid level, and realizes the compensation to temperature fluctuations disturb.
The technical scheme that the present invention adopts: a kind of water tumbler formula optical fiber Bragg raster sedimentometer is characterized in that: comprising: cuboid container 1, optical fiber Bragg raster liquid level sensor I 2; Coiled pipe 3; Optical fiber 4, spherical container 5, optical fiber Bragg raster liquid level sensor II 6; Cuboid container 1 all is equipped with water with spherical container 5, and water is housed in the container, and cuboid container 1 is linked to each other by coiled pipe 3 with spherical container 5 and communicates, and constitutes a closed container; Between coiled pipe 3 and the spherical container 5 inside and outside shells is a cavity, and optical fiber 4 is drawn from cavity; Be placed with identical optical fiber Bragg raster liquid level sensor I of structure 2 and optical fiber Bragg raster liquid level sensor II 6 in cuboid container 1 and the spherical container 5 respectively, optical fiber Bragg raster liquid level sensor I 2 is connected with external signal treating apparatus 13 through optical fiber 12 respectively with optical fiber Bragg raster liquid level sensor II 6.
Described optical fiber Bragg raster liquid level sensor constitutes an airtight cavity for circle convoluted diaphragm 7 and canister 9; Equi intensity cantilever 11 top vertical fixing metal pressure transmission bars 8; The geometric center of the top of metal pressure transmission bar 8 contact circle convoluted diaphragm 7 is posted optical fiber Bragg raster 10 at the stiff end upper and lower surfaces of equi intensity cantilever 11.
On the water surface of cuboid container 1 and spherical container 5, be added with one deck oil, like this can the enhanced leaktightness effect.
The method of application of water tumbler formula optical fiber Bragg raster sedimentometer; The method of application of described water tumbler formula optical fiber Bragg raster sedimentometer is that cuboid container 1 is fixed on not on the pedestal with the dam body sedimentation; When sedimentation takes place; Liquid level difference increases; The water pressure that acts on the round convoluted diaphragm 7 increases; Round convoluted diaphragm 7 deformation are changed; Cause that further wavelength-shift takes place the optical fiber Bragg raster 10 that sticks on equi intensity cantilever 11; Optical fiber Bragg raster 10 is through external optical fiber 12; Utilize external signal treating apparatus 13 to obtain the shift value of optical fiber Bragg raster centre wavelength, utilize formula
,
effective elasto-optical coefficient in the formula;
is the centre wavelength of optical fiber Bragg raster;
is the shift amount of wavelength, and p is a pressure, and t is the thickness of circle convoluted diaphragm 7; R is the working portion radius of circle convoluted diaphragm 7; A is the radius of circle convoluted diaphragm 7 any parts, and E is the elastic modulus of circle convoluted diaphragm 7 materials,
be the density of circle convoluted diaphragm 7 materials;
is the Poisson ratio of circle convoluted diaphragm 7 materials;
is the thickness of equi intensity cantilever 11, and
is the length of equi intensity cantilever 11, and g is the terrestrial gravitation constant; H is a liquid level; Thereby calculate the hydraulic pressure value at measuring point place,, can calculate two liquid levels between the optical fiber Bragg raster liquid level sensor according to the differential pressure method principle; Deduct the liquid level between preceding two optical fiber Bragg raster liquid level sensors of sedimentation, settling amount that must dam body.
Described cuboid container 1, coiled pipe 3, optical fiber 4, spherical container 5, circle convoluted diaphragm 7, canister 9, optical fiber Bragg raster 10 is commercially available common components; Optical fiber Bragg raster liquid level sensor I 2, optical fiber Bragg raster liquid level sensor II 6, metal pressure transmission bar 8, equi intensity cantilever 11 can adopt conventional method processing.
The invention has the beneficial effects as follows: adopt optical fiber Bragg grating sensor and linker to combine the sedimentation of Measurement of Dam contour level building, utilize differential pressure method, balance out the influence of atmospheric pressure, improved measuring accuracy settlement observation; Utilization is pasted on the otherness of the sensing grating on the upper and lower surface of equi intensity cantilever to the temperature and pressure response, measures when can realize temperature and liquid level, and realizes the compensation to temperature fluctuations disturb.
Description of drawings
Fig. 1 is a water tumbler formula Bragg fiber grating sedimentometer structural representation;
Fig. 2 is fiber Bragg fiber grating liquid level sensor construction figure.
Among the figure: 1-cuboid container, 2-optical fiber Bragg raster liquid level sensor, 3-coiled pipe, 4-optical fiber; The 5-spherical container, 6-optical fiber Bragg raster liquid level sensor, 7-circle convoluted diaphragm; 8-metal pressure transmission bar, 9-metal shell, 10-optical fiber Bragg raster; The 11-equi intensity cantilever, 12-optical fiber, 13-external signal treating apparatus.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is further specified, understand to make things convenient for the technician.
As shown in Figure 1: water tumbler formula optical fiber Bragg raster sedimentometer is characterized in that: comprising: cuboid container 1, optical fiber Bragg raster liquid level sensor I 2, coiled pipe 3, optical fiber 4, spherical container 5, optical fiber Bragg raster liquid level sensor II 6; Cuboid container 1 all is equipped with water with spherical container 5, in the container lower floor water is housed, and there is a certain amount of oil on the upper strata, to improve cuboid container 1 sealing; Cuboid container 1 is linked to each other by coiled pipe 3 with spherical container 5 and communicates, and constitutes a closed container; Between coiled pipe 3 and the spherical container 5 inside and outside shells is a cavity, and optical fiber 4 is drawn from cavity; Be placed with identical optical fiber Bragg raster liquid level sensor I of structure 2 and optical fiber Bragg raster liquid level sensor II 6 in cuboid container 1 and the spherical container 5 respectively, optical fiber Bragg raster liquid level sensor I 2 is connected with external signal treating apparatus 13 through optical fiber 12 respectively with optical fiber Bragg raster liquid level sensor II 6.
As shown in Figure 2: described optical fiber Bragg raster liquid level sensor constitutes an airtight cavity for circle convoluted diaphragm 7 and canister 9; Equi intensity cantilever 11 top vertical fixing metal pressure transmission bars 8; The geometric center of the top of metal pressure transmission bar 8 contact circle convoluted diaphragm 7 is posted optical fiber Bragg raster 10 at the stiff end upper and lower surfaces of equi intensity cantilever 11.
On the water surface of cuboid container 1 and spherical container 5, be added with one deck oil, like this can the enhanced leaktightness effect.
The method of application of water tumbler formula optical fiber Bragg raster sedimentometer; The method of application of described water tumbler formula optical fiber Bragg raster sedimentometer is that cuboid container 1 is fixed on not on the pedestal with the dam body sedimentation; When sedimentation takes place; Liquid level difference increases; The water pressure that acts on the round convoluted diaphragm 7 increases; Round convoluted diaphragm 7 deformation are changed; Cause that further wavelength-shift takes place the optical fiber Bragg raster 10 that sticks on equi intensity cantilever 11; Optical fiber Bragg raster 10 is through external optical fiber 12; Utilize external signal treating apparatus 13 to obtain the shift value of optical fiber Bragg raster 10 centre wavelengths, utilize formula
,
effective elasto-optical coefficient in the formula;
is the centre wavelength of optical fiber Bragg raster;
is the shift amount of wavelength, and p is a pressure, and t is the thickness of circle convoluted diaphragm 7; R is the working portion radius of circle convoluted diaphragm 7; A is the radius of circle convoluted diaphragm 7 any parts, and E is the elastic modulus of circle convoluted diaphragm 7 materials,
be the density of circle convoluted diaphragm 7 materials;
is the Poisson ratio of circle convoluted diaphragm 7 materials;
is the thickness of equi intensity cantilever 11, and
is the length of equi intensity cantilever 11, and g is the terrestrial gravitation constant; H is a liquid level; Thereby calculate the hydraulic pressure value at measuring point place,, can calculate two liquid levels between the optical fiber Bragg raster liquid level sensor according to the differential pressure method principle; Deduct the liquid level between preceding two optical fiber Bragg raster liquid level sensors of sedimentation, settling amount that must dam body.
The mathematical model of measuring technique of the present invention is following:
The wavelength-shift that the even axial strain of fiber grating causes is:
In the formula (1); Effective elasto-optical coefficient
;
is the centre wavelength of optical fiber Bragg raster;
is the shift amount of wavelength,
be tangential strain.
Suppose that circle convoluted diaphragm periphery is solid propping up, there is equally distributed pressure effect circle convoluted diaphragm bottom surface, makes round convoluted diaphragm generation deformation (establishing it is in little of the degree state), and according to circular sheet small deflection Deformation Theory, the amount of deflection that the circle convoluted diaphragm produces is:
Have formula (2) to learn, the amount of deflection that (r=0) locates at the center is maximum, and its amount of deflection maximal value is:
The formula that satisfies the small deflection theory scope is:
(2) in formula, (3) formula (4) formula: p is pressure (Pa); T is a circle convoluted diaphragm thickness (cm); R is the radius (cm) of circle convoluted diaphragm working portion; A is the radius (cm) of circle convoluted diaphragm any part; E is the elastic modulus (MPa) of circle convoluted diaphragm material;
is the density (kg/
) of circle convoluted diaphragm material,
be that the pool of round convoluted diaphragm material send the pine ratio.
The metal pressure transmission sense that the distortion of circle convoluted diaphragm promotes its below, center of circle moves down; Suitable, the equal-sized amount of deflection of compressing equi intensity cantilever generation direction changes, and promptly the amount of deflection of equi intensity cantilever is changed to
.
The size of equi intensity cantilever upper edge axis direction strain does not change with the difference of position, and the relation of its strain
and equi intensity cantilever free end amount of deflection
is:
(5) in the formula;
is the thickness of equi intensity cantilever,
be equi intensity cantilever length.
Bring (3) formula into (5) formula, the then strain on the equi intensity cantilever
with the relation of even cloth pressure
is:
(6) formula substitution (1) formula; And pressure formula
is arranged, can get the Bagg wavelength-shift of optical fiber Bragg raster and the relation of liquid level
and be:
（7）
Formula (7) has shown the mathematical model between the Bragg wavelength-shift of liquid level h that liquid level sensor is suffered and optical fiber Bragg raster, and the Bragg wavelength-shift through the measuring light fiber Bragg grating can calculate liquid level.
For closed container, what we adopted is that differential pressure method comes measuring liquid level.Before the sedimentation; Suppose that the liquid level sensor in the cuboid container records pressure is
; Liquid level is A; The pressure that liquid level sensor in the spherical container records is
; Liquid level is B, then can be got by differential pressure method:
Can get the liquid level between preceding two liquid level sensors of sedimentation by (8) formula.Take place as sedimentation; And variation has also taken place in the liquid level in the cuboid container; The pressure that liquid level sensor in the cuboid container of supposing to record this moment records is for
; Liquid level is a; The pressure that liquid level sensor in the spherical container records is
; Liquid level is b, can be got by differential pressure method equally:
（9）
(7), in (8), (9) formula
(density of water);
(terrestrial gravitation constant), h is a liquid level.
(9) formula can get the liquid level between two liquid level sensors after the sedimentation; By (8) formula and (9) formula; Can get the settling amount
of dam, as shown in Figure 1.
Specific embodiment:
Concrete parameter in actual fabrication is:
1, justifies convoluted diaphragm 7 materials: the permanent alloy 3J53 that plays; Young's modulus of elasticity
GPa, Poisson ratio
;
2, justify convoluted diaphragm 7 sizes: radius
mm;
mm, thickness t=0.5mm;
3, the length of equi intensity cantilever 11
mm; Thickness
mm
4, coiled pipe size: length 2m;
5, optical fiber Bragg raster 10 technical parameters: centre wavelength
nm, valid round-spectrum number
;
6, cuboid container 1 has coiled pipe 3 to link to each other with spherical container 5 to communicate, and coiled pipe adopts that two-port is threaded to have a fine flexible tube, and two containers can be connected with coiled pipe preferably.
7,, obtain the Bragg wavelength of optical fiber Bragg raster with external signal treating apparatus 13;
8, according to formula (8), the Bragg wavelength-shift of optical fiber Bragg raster to the response sensitivity of liquid level is:
With known quantity substitution formula (10), Theoretical Calculation shows that when the wavelength resolution of optical fiber Bragg raster (FBG) demodulator was 1pm, the resolution of this sensor was 0.3987cm=3.987mm.According to circular sheet small deflection Deformation Theory, the amount of deflection variable quantity of circle convoluted diaphragm should be less than 1/3 of circle convoluted diaphragm thickness, and theoretical maximum range that can this liquid level sensor is 0.03048MPa.By pressure formula
; Its liquid level height is 3m. result of calculation to the maximum and shows; The present invention has high measurement resolution; Measuring error is little, advantages such as good reproducibility, and detectable subsidence range is (0-2) m simultaneously.
The present invention describes through the practical implementation process; Without departing from the present invention; Can also carry out various conversion and be equal to replacement patent of the present invention; Therefore, patent of the present invention is not limited to disclosed practical implementation process, and should comprise the whole embodiments that fall in the Patent right requirement scope of the present invention.
Claims (4)
1. a water tumbler formula optical fiber Bragg raster sedimentometer is characterized in that: comprise cuboid container, optical fiber Bragg raster liquid level sensor I, coiled pipe, optical fiber, spherical container, optical fiber Bragg raster liquid level sensor II; Cuboid container and spherical container all are equipped with water, and water is housed in the container, and cuboid container is linked to each other by coiled pipe with spherical container and communicates, and constitutes a closed container; Be a cavity between the inside and outside shell of coiled pipe and spherical container, optical fiber is drawn from cavity; Be placed with identical raster liquid level sensor I of structure and optical fiber Bragg raster liquid level sensor II respectively in cuboid container and the spherical container, the raster liquid level sensor I is connected with the external signal treating apparatus through optical fiber with the optical fiber Bragg raster liquid level sensor II.
2. a kind of water tumbler formula optical fiber Bragg raster sedimentometer according to claim 1; It is characterized in that: optical fiber Bragg raster liquid level sensor is circle convoluted diaphragm and airtight cavity of canister formation; Equi intensity cantilever top vertical fixing metal pressure transmission bar; The geometric center of the top of metal pressure transmission bar contact circle convoluted diaphragm is posted optical fiber Bragg raster at the stiff end upper and lower surfaces of equi intensity cantilever.
3. a kind of water tumbler formula optical fiber Bragg raster sedimentometer according to claim 1 is characterized in that: on the water surface of cuboid container and spherical container, be added with one deck oil.
4. the method for application of a water tumbler formula optical fiber Bragg raster sedimentometer; It is characterized in that: the method for application of described water tumbler formula optical fiber Bragg raster sedimentometer is that cuboid container is fixed on not on the pedestal with the dam body sedimentation; When sedimentation takes place; Liquid level difference increases; The water pressure that acts on the round convoluted diaphragm increases; Round convoluted diaphragm deformation is changed; Further cause the optical fiber Bragg raster generation wavelength-shift that sticks on equi intensity cantilever; Optical fiber Bragg raster is through external optical fiber; Utilize the external signal treating apparatus to obtain the shift value of optical fiber Bragg raster centre wavelength, utilize formula
,
effective elasto-optical coefficient in the formula;
is the centre wavelength of optical fiber Bragg raster;
is the shift amount of wavelength, and p is a pressure, and t is the thickness of circle convoluted diaphragm; R is the working portion radius of circle convoluted diaphragm; A is the radius of circle convoluted diaphragm any part, and E is the elastic modulus of circle convoluted diaphragm material,
be the density of circle convoluted diaphragm material;
is the Poisson ratio of circle convoluted diaphragm material;
is the thickness of equi intensity cantilever, and
is the length of equi intensity cantilever, and g is the terrestrial gravitation constant; H is a liquid level; Thereby calculate the hydraulic pressure value at measuring point place,, can calculate two liquid levels between the optical fiber Bragg raster liquid level sensor according to the differential pressure method principle; Deduct the liquid level between preceding two optical fiber Bragg raster liquid level sensors of sedimentation, settling amount that must dam body.
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|---|---|---|---|
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102487215A CN102768035A (en) | 2012-07-18 | 2012-07-18 | Cup type optical fiber Bragg grating settlement meter and method of application for settlement meter |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103822609A (en) * | 2014-01-15 | 2014-05-28 | 云南电力试验研究院（集团）有限公司电力研究院 | Double-sleeve type fiber Bragg grating settlement meter |
| CN105674951A (en) * | 2015-12-30 | 2016-06-15 | 基康仪器股份有限公司 | Integrated settlement monitoring apparatus based on optical fiber F-P cavity pressure sensor |
| CN110375824A (en) * | 2019-08-22 | 2019-10-25 | 黑龙江大学 | Gas station's tank level and density sensor based on fiber grating |
| CN111044208A (en) * | 2019-12-31 | 2020-04-21 | 电子科技大学 | Optical fiber differential pressure sensing system with high static pressure and low differential pressure |
| WO2021044032A1 (en) * | 2019-09-04 | 2021-03-11 | Daniel Scott | A settlement monitoring system and method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2537956Y (en) * | 2002-04-12 | 2003-02-26 | 谢家波 | Simple height measurer |
| CN201724656U (en) * | 2010-06-24 | 2011-01-26 | 上海启鹏工程材料科技有限公司 | Device for measuring ground differential settlement |
| CN102494670A (en) * | 2011-12-07 | 2012-06-13 | 上海同禾土木工程科技有限公司 | Method for monitoring foundation settlement by using static water level gauge and static water level gauges used in method |
-
2012
- 2012-07-18 CN CN2012102487215A patent/CN102768035A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2537956Y (en) * | 2002-04-12 | 2003-02-26 | 谢家波 | Simple height measurer |
| CN201724656U (en) * | 2010-06-24 | 2011-01-26 | 上海启鹏工程材料科技有限公司 | Device for measuring ground differential settlement |
| CN102494670A (en) * | 2011-12-07 | 2012-06-13 | 上海同禾土木工程科技有限公司 | Method for monitoring foundation settlement by using static water level gauge and static water level gauges used in method |
Non-Patent Citations (4)
| Title |
|---|
| 刘钦朋: "《双悬臂梁光纤Bragg光栅应力传感器》", 《光子学报》 * |
| 张倩: "压力式光纤液位传感器", 《光通信技术》 * |
| 杜磊: "光纤布喇格光栅沉降传感器", 《光子学报》 * |
| 赵二刚: "光纤光栅液位传感器研究", 《中国优秀硕士学位论文全文数据库 信息科技辑》 * |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103822609A (en) * | 2014-01-15 | 2014-05-28 | 云南电力试验研究院（集团）有限公司电力研究院 | Double-sleeve type fiber Bragg grating settlement meter |
| CN103822609B (en) * | 2014-01-15 | 2016-04-20 | 云南电力试验研究院（集团）有限公司电力研究院 | A kind of two telescopic optical fiber Bragg raster sedimentometer |
| CN105674951A (en) * | 2015-12-30 | 2016-06-15 | 基康仪器股份有限公司 | Integrated settlement monitoring apparatus based on optical fiber F-P cavity pressure sensor |
| CN110375824A (en) * | 2019-08-22 | 2019-10-25 | 黑龙江大学 | Gas station's tank level and density sensor based on fiber grating |
| WO2021044032A1 (en) * | 2019-09-04 | 2021-03-11 | Daniel Scott | A settlement monitoring system and method |
| GB2594434A (en) * | 2019-09-04 | 2021-11-03 | Osprey Measurement Systems Ltd | A settlement monitoring system and method |
| GB2594434B (en) * | 2019-09-04 | 2024-03-20 | Osprey Measurement Systems Ltd | A settlement monitoring system and method |
| CN111044208A (en) * | 2019-12-31 | 2020-04-21 | 电子科技大学 | Optical fiber differential pressure sensing system with high static pressure and low differential pressure |
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Application publication date: 20121107 |