CN101122478A - Optical fibre grating flushing monitoring sensor and its manufacture method - Google Patents
Optical fibre grating flushing monitoring sensor and its manufacture method Download PDFInfo
- Publication number
- CN101122478A CN101122478A CNA2007101443045A CN200710144304A CN101122478A CN 101122478 A CN101122478 A CN 101122478A CN A2007101443045 A CNA2007101443045 A CN A2007101443045A CN 200710144304 A CN200710144304 A CN 200710144304A CN 101122478 A CN101122478 A CN 101122478A
- Authority
- CN
- China
- Prior art keywords
- connecting rod
- steel
- monitoring sensor
- metal shell
- flat diaphragm
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Abstract
The invention provides a fiber grating scour monitoring sensor and a manufacturing method, including a sensing probe. The sensing probe is installed vertically to the axial direction of the connecting steel tube pile in a measuring section of a connecting steel tube pile and is connected with the connecting steel tube pipe in a way of sealing. The sensing probe consists of a metal casing, metal netting, a flat diaphragm, a connecting bar, a FRP equal strength beam, a temperature self-compensation dual-fiber grating sealed in the equal strength beam and a fiber extraction line for connecting the fiber grating. The scour test principle of the invention is clear and reliable. The test method is novel and ingenious. The influence of earth pressure and hydrostatic pressure varying with depth on the measuring structure is eliminated. With FRP equal strength beam of the sealed fiber grating and advanced technologies such as temperature self-compensation dual-fiber grating, the high test precision can reach to 0.2m or even smaller. And the precision can be changed according to the user demands. The sensor has the advantages of simple process and manufacturing, convenient construction and low cost.
Description
(1) technical field
The present invention relates to a kind of civil engineering work monitoring technology, be specifically related to a kind of civil engineering structure flushing monitoring sensor based on fiber grating (FBG) sensing technology.
(2) background technology
One of major reason that bridge, dam, ocean platform etc. are destructurized is exactly washing away of current, causes the ground below the structure to be fallen by erosion gradually, makes structure be in unsafe condition.Structure is destroyed normally without any sign because of its basis is subjected to current scour, is to occur under water because wash away, and is difficult to pass through instrument monitoring.Architecture basics is in case washed away when taking place to destroy the safety that will jeopardize vehicle and pedestrian.Cause huge social loss and economic loss.Occurred in 30 years in the past in the incident that collapses of bridge block more than 1000 of the U.S., have 60% to be because the erosion damage of bridge pier.Be subjected to that the more serious SOUTHERN CHINA of typhoon influence is coastal, areas such as Taiwan, Korea S and Japan, follow typhoon and the storm flood that comes is more serious to the erosion damage of bridge pier; Ocean current is to the safety that has had a strong impact on platform structure of washing away on the basis of ocean platform; River is to the safety that also threatens dam of washing away of two sides, river dam foundation, and these potential safety hazards have become the problem that people extremely are concerned about.Therefore, the flushing monitoring of large scale structure has become field of civil engineering and has pressed for one of engineering problem of solution.
Traditional scour depth surveying instrument has artificial pit gauge, sonar, radar and domain reflectometer (TDR) etc., but use these instruments all there is significant limitation in the detection method of washing away.Artificial pit gauge mensuration need expend lot of manpower and material resources, and operation causes very big threat to the safety of survey crew on the water, and the quality of measurement result and survey crew has very big relation; Though sonar, radar are installed easily, the result is difficult to extract, and particularly when containing a large amount of silt and fragment in the water, noise is very big to the influence of signal; The domain reflectometer technology is to measure the riverbed degree of depth by transmitting and receiving the electromagnetic impulse signal, but long transfer wire is bigger to the power and the signal to noise ratio (S/N ratio) influence of signal, causes distorted signals easily, influences measurement result.
The bridge scour sensor that adopts fiber grating sensing technology to design and develop can remedy the deficiency of above traditional detection method.Fiber grating is as a kind of novel passive optical device, advantages such as having protection against the tide, corrosion resistant, be easy to transmission, loss is little, be easy to lay, be easy to networking and monitoring capability is strong has in real time become one of sensitive element that is most widely used in intellectual material and the association area thereof.With the fiber grating be the sensitive element sensor apparatus of making also in wideling popularize, existing domestic patent of invention and utility model patent totally 100 remainders, but still do not have relevant patent and pertinent literature at utilizing fiber grating research to wash away the domestic retrieval of problem.Univ Nat Taiwan and national earthquake engineering research center are developed jointly out a fiber grating bridge scour sensor, and its sensing probe is to paste bare optical fibers and bare optical gratings in the cantilever disc structure, and adopt metallic nickel and glue to encapsulate.Its principle is: when the sensing probe that exposes the riverbed is subjected to water impact, the cantilever disk is shaken, the variation of the strain of fiber grating perception is big, the transfixion when probe below the riverbed is not subjected to water impact, the variation of the strain of fiber grating perception is little, determine the scour depth in riverbed according to the size of strain, but Design of Sensor can not be got rid of with the influence to sensing probe of the earthing soil pressure of change in depth and hydrostatic force, and do not consider issues of temperature compensation, may cause big measuring error; Along with at home and abroad flourish of monitoring structural health conditions (SHM) in recent years, fiber grating class sensor is as the sensor of promising monitoring structural health conditions, it is used also more and more widely, and all having installed with the fiber grating on a lot of newly-built bridges, the ocean platform is the sensitive element health monitoring systems.One of developing goal from now on will be set up the structural healthy monitoring system of the full optical fiber of a cover for large scale structures such as bridge, ocean platforms exactly, and also just needs corresponding optical fiber sensor as the problem that the abutment plinth scour depth of one of important indicator is measured.Therefore the summary of the invention of this patent just is based on the optical fiber grating sensing monitoring technology and the sensor thereof of the measurement structure foundation scouring degree of depth that a kind of suitable engineering of above background exploitation uses, and the benefit of wide application prospect and reality is arranged.
(3) summary of the invention
The object of the present invention is to provide a kind of optical fibre grating flushing monitoring sensor with high-durability, pinpoint accuracy, temperature self-compensation.
The object of the present invention is achieved like this: it comprises sensing probe, it is characterized in that: sensing probe is by metal shell, the wire netting sheet, flat diaphragm, connecting rod, the FRP beam of uniform strength, the temperature self-compensation double optical fiber grating that is encapsulated in the beam of uniform strength is formed with the fiber pigtail that is connected fiber grating, metal shell first half middle part is provided with the boss that the beam of uniform strength is installed, the beam of uniform strength is clipped in the middle of the connecting rod and vertically is connected with connecting rod, flat diaphragm is arranged on the metal shell both sides, connect by connecting rod between the flat diaphragm center, the wire netting sheet is installed in the flat diaphragm outside, and fiber pigtail gathers and passes metal shell.
The present invention also has some technical characterictics like this:
1, it also comprises the connection steel-pipe pile that is anchored at the target sidewall, connect steel-pipe pile and comprise pile cover, measuring section, anchoring section and stake point, sensing probe is packed into to connect in the steel-pipe pile measuring section and axially and with being connected steel-pipe pile is tightly connected perpendicular to connecting steel-pipe pile, and fiber pigtail passes metal shell and is aggregated into the side that connects steel-pipe pile measuring section top and passes the connection steel-pipe pile;
2, described connecting rod is the middle common solid round rod that has two lobe bayonet sockets;
3, the end sides perforate of the described beam of uniform strength;
4, described flat diaphragm central authorities are provided with boss, and boss central authorities are provided with the hole of passing for connecting rod;
5, described metal shell two ends are provided with the metal crimp ring plate, are provided with rubber sheet gasket between metal shell end and the flat diaphragm and between flat diaphragm and the metal crimp ring plate, wire netting sheet and metal crimp ring plate by screw fixings on metal shell;
6, described fiber pigtail Correspondent is crossed the seal tube that passes the connection steel-pipe pile and is passed the connection steel-pipe pile.
The present invention also aims to provide the method for making of this sensor: metal shell is divided into the first half, Lower Half, pressure ring sheet four parts at two ends, the left and right sides are processed assembling, the beam of uniform strength is installed at first half central protrusion place, fiber pigtail is drawn by aperture, sealing then, two parts couple together into tubular up and down, end sides perforate on brutal, connecting rod vertically is connected with the beam of uniform strength, the prefabricated boss of flat diaphragm central authorities, and in the punching of boss central authorities, connecting rod cooperates with the hole and glueds joint, the fiber pigtail of each probe is aggregated into the side of stake top section, connect by seal tube again and draw steel pipe, each flexible pipe is gathering by house steward to the water surface, and the processing technology of the beam of uniform strength is for brutal mould such as together entering with optical fiber with fibrous bundle by shaping at fibre reinforced plastics in the process, between FRP cloth respectively along two fiber gratings of the parallel placement in precalculated position of the length direction of beam, be squeezed into the FRP plate of compound FBG again by laminates, then the FRP plate be processed into the FRP beam.
The distribution method of sensor is among the present invention: at the pier footing Upstream section, sensor can be set as the latticed of different longitudinal and transverse spacings and write down coordinate position, the stake top mark height of each point according to accuracy requirement cloth, can get initial riverbed absolute altitude by measuring, can obtain the situation of washing away of each point by long-term flushing monitoring, on coordinate paper, draw the scour depth of each point, the identical absolute altitude place line contour map that can be washed.
The construction method of installation of sensor is among the present invention: sensor can singlely be fixed on the fluoran stream surface of bridge pier, also can leave bridge pier and be anchored on the riverbed, but this anchoring section long enough that requires sensor with prevent sensor by current towards askew and influence measuring accuracy.Overlap the thick steel pipe of one deck diameter ratio sensor diameter again as protection tube in sensor outside during construction, and together thump to sensor and to specify absolute altitude, and then pull out the protection steel pipe.The flat diaphragm that must guarantee sensor during construction is in face of coming flow path direction, and preferably makes a top mark high consistent, is convenient to like this draw, also can be inconsistent, and it is fixed to come according to soil property and measurement range.
The principle of work of flushing monitoring technology of the present invention is as follows:
It mainly utilizes the characteristics that cylinder streams in moving water, and cylinder is in the fluoran stream surface power (positive flowing pressure) that is hit, and lee side is subjected to suction (negative flowing pressure), they be subjected to force direction identical (as shown in Figure 1).Its sensing probe utilizes two sheet material of fluoran stream surface and lee side, area, thickness, construct identical flat diaphragm external force (is comprised soil pressure, hydrostatic force and flowing pressure) be converted into the concentrated force of connecting rod, connecting rod connects the flat diaphragm of fluoran stream surface and lee side, make the sex change of flat diaphragm central spot coordinate, connecting rod is subjected to producing translation along the effect of the out-of-balance force system of axis direction, drive and connecting rod equi intensity cantilever generation connected vertically deflection sex change, therefore the temperature self-compensation FBG that is encapsulated in the brutal such as FRP just can detect strain variation, makes wherein the cardiac wave long hair give birth to change.When probe buries in the riverbed, connecting rod can balance fluoran stream surface and suffered opposite hydrostatic force and the soil pressure (as shown in Figure 2) of equal and opposite in direction, direction of lee side, the brutal that waits that links to each other with connecting rod does not have deflection deformation substantially, is encapsulated in the not variation of wavelength that waits the temperature self-compensation FBG in the brutal; When probe exposes the riverbed and is subjected to water impact, two flat diaphragm energy balance hydrostatic forces, but can not the balance direction flowing pressure (as shown in Figure 3) of identical and continuous variation, therefore brutal generation deflection such as connecting rod drive, by being encapsulated in the temperature self-compensation FBG in the beam of uniform strength, can obtain the variation of strain.Riverbed face absolute altitude just centre wavelength change and two residing absolute altitudes of sensing probe not changing between, thereby determine the scour depth in riverbed.
Compare with optical fibre grating flushing monitoring technology and sensor thereof that other have developed, the present invention has following 5 advantages:
1, the test philosophy that washes away of the present invention is advanced reliable, and the method for testing novelty is ingenious.The characteristics (as shown in Figure 1) that the flowing pressure that the present invention is streamed according to damaged surface distributes, got rid of in the water influence dexterously with hydrostatic force and the soil pressure of change in depth, and directly measure the flowing pressure (shown in Fig. 2,3) of current, obtain the scour depth in riverbed by the variation of the strain of fiber grating perception.
2, measuring accuracy height of the present invention, its measuring accuracy can reach 0.2m even littler, and can change precision according to user's requirement, mainly by changing flat diaphragm and waiting the physical dimension of brutal, the method for probe arrangement pitch to reach the purpose that changes precision; The present invention is stressed clearly, structure is reasonable, and encapsulation double grating temperature self-compensation method in the beam of uniform strength is adopted in its strain measurement, makes strain measurement more accurate, and measuring accuracy is higher.
3, good endurance of the present invention, it mainly shows: fiber grating is encapsulated in the FRP material beam of uniform strength of highly corrosion resistant; Flat diaphragm adopts the high-molecular organic material of highly corrosion resistant and watertightness; The method that the each several part junction is all adopted high-quality O-ring seal and is fastenedly connected, strict guarantee the impermeability of sensor internal (as shown in Figure 4).Above structure makes the sensor sensing element obtain multiple waterproofing protection, thereby makes sensor have good permanance in wet environment.
4, the present invention not only can monitor local scour, can also monitor integral body and wash away.Can monitor the scour depth of basic overburden layer when being arranged in basic upstream wall when sensor is single; When some sensors at a certain distance grid be arranged in around the basis, can also realize determine (as shown in Figure 5) to degradation degree near the certain limit bridge pier promptly realizing whole flushing monitoring by algorithm.
5, sensor processing and fabricating of the present invention is simple, and it is convenient, with low cost to lay, and has broad application prospects and considerable economic and social benefits.
The invention provides a kind of civil engineering structure flushing monitoring technology and sensor thereof, be applicable to scour depth and the scope of Quantitative Monitoring current near the overburden layer large scale civil engineering structure bases such as bridge, dam, ocean platform based on fiber grating (FBG) sensing technology.The invention still further relates to this manufacture craft of sensing probe and the laying construction technology of sensing and monitoring system of washing away.By continuous, real-time monitoring, the bridge supvr can take the information of bridge scouring state, as the danger early warning of civil engineering structure and the foundation of maintenance reinforcing.
(4) description of drawings
Fig. 1-Fig. 3 is a principle key diagram of the present invention;
Fig. 4-Fig. 6 is the structural map of sensing probe of the present invention and the artwork of sensor.
(5) specific embodiments
For example the present invention is done more detailed description below in conjunction with accompanying drawing:
Present embodiment comprises:
1, scour sensor is made up of with the steel-pipe pile that is connected that is anchored at riverbed or bridge pier sidewall some sensing probes (quantity is determined according to user's accuracy requirement), connect steel-pipe pile and comprise four parts compositions (as shown in Figure 6) such as pile cover 13, measuring section 14, anchoring section 15 and a point 16, the laying of sensor is determined according to the form of bridge pier, situation big or small and silt layer on every side.Connect steel-pipe pile vertical riverbed face anchoring, and make sensor probe in face of coming flow path direction, the length of measuring section, anchoring section is determined by the site inspection report.
2, the structure of the probe of sensor: the probe of sensor is a detachable module, in the steel-pipe pile of packing into after the machine-shaping perpendicular to steel shaft to prefabricated through hole, be connected with steel pipe sealing to prevent steel pipe water inlet by welding or securing member.Sensing probe by metal shell 1, wire netting sheet 12, flat diaphragm 4, connecting rod 6, the FRP beam of uniform strength 8, be encapsulated in temperature self-compensation double optical fiber grating 9 in the beam of uniform strength 8 and fiber pigtail 11 etc. and form (as shown in Figure 4).The optical fiber of product of the present invention and grating are arranged in the fibre reinforced plastics (FRP), its processing technology is generally processing FRP cloth earlier, between FRP cloth,, be squeezed into the FRP plate of compound FBG again by laminates, then the FRP plate be processed into the FRP beam of designing requirement by specifying requirement to place FBG.
The processing technology thereof of present embodiment sensor probe is described in conjunction with Fig. 4.Metal shell 1 can adopt antiseptic property materials processings preferably such as stainless steel (as the 2Cr13 steel) or aluminium, metal shell 1 can be made cylinder or rectangular tubular, and metal crimp ring plate 2 four parts that are divided into the first half, Lower Half, two ends, the left and right sides are processed assembling.At first half central protrusion place, with two screws the beam of uniform strength 8 is installed, fiber pigtail 11 is drawn by optical fiber fairlead 10, then the sky epoxy sealing, add the water proof rubber pad between the first half and the Lower Half, couple together into tubular with two parts about the bolt handle.The common solid round rod that has two lobe 7 bayonet sockets in the middle of connecting rod 6 can be made, the beam of uniform strength 8 is clipped in the middle, connecting rod 6 can adopt corrosion resistant metal or FRP material to make, the end sides perforate of the beam of uniform strength 8 can be adopted bayonet socket to connect or connects with glue between the connecting rod 6 and the beam of uniform strength 8.The fluoran stream surface of sensing probe and lee side are to make that by connecting rod 6 connections the amount of deflection at two centers is identical between two plate shapes, size, the identical flat diaphragm of thickness 4, the two diaphragm centers, with balance hydrostatic force and soil pressure; Vertical connection mutually between the beam of uniform strength 8 and the connecting rod 6 is to experience the axial displacement of connecting rod.The metal crimp ring plate 2 at flat diaphragm 4 and two ends is installed then, all rubber sheet gasket will be set between tube end and the flat diaphragm 4 and between flat diaphragm 4 and the metal crimp ring plate 2, in case the cylindrical shell water inlet fixes the wire netting sheet and compresses the pressure ring sheet with some screws.Flat diaphragm 4 central prefabricated boss 5, and in the punching of boss 5 central authorities, connecting rod 6 cooperates with the hole and glueds joint.Wherein can change shape, the size of cylindrical shell according to different situations, change shape, area, the thickness of flat diaphragm 4, change the thickness of connecting rod 6, change the length of the beam of uniform strength 8 and the sensitivity that thickness changes probe.The fiber pigtail 11 of each probe is aggregated into the side of stake top section, connects by seal tube and draws steel pipe and guarantee that steel duct do not intake, and each flexible pipe is gathering by house steward to the water surface, and the strict guarantee flexible pipe is not intake.
Product of the present invention can adopt such method to make the FRP beam of uniform strength: by shaping at fibre reinforced plastics in the process optical fiber brutal mould such as is entered together with fibrous bundle, between FRP cloth respectively along two fiber gratings of the parallel placement in precalculated position of the length direction of beam, be squeezed into the FRP plate of compound FBG again by laminates, then the FRP plate be processed into the FRP beam of designing requirement.
The laying of sensor is described in conjunction with Fig. 5.At the architecture basics Upstream section, sensor can be set as the latticed of different longitudinal and transverse spacings and write down coordinate position, the stake top mark height of each point according to accuracy requirement cloth, can get initial riverbed absolute altitude by measuring, can obtain the situation of washing away of each point by long-term flushing monitoring, on coordinate paper, draw the scour depth of each point, the identical absolute altitude place line contour map that can be washed.
The construction method of installation of sensor is described in conjunction with Fig. 6.Sensor can singlely be fixed on the fluoran stream surface of architecture basics, also can leave architecture basics and be anchored on the riverbed, but this anchoring section long enough that requires sensor with prevent sensor by current towards askew and influence measuring accuracy.Overlap the thick steel pipe of one deck diameter ratio sensor diameter again as protection tube in sensor outside during construction, and together thump to sensor and to specify absolute altitude, and then pull out the protection steel pipe.The flat diaphragm that must guarantee sensor during construction is in face of coming flow path direction, and preferably makes a top mark high consistent, is convenient to like this draw, also can be inconsistent, and it is fixed to come according to soil property and measurement range.
Claims (8)
1. optical fibre grating flushing monitoring sensor, it comprises sensing probe, it is characterized in that: sensing probe is by metal shell, the wire netting sheet, flat diaphragm, connecting rod, the FRP beam of uniform strength, the temperature self-compensation double optical fiber grating that is encapsulated in the beam of uniform strength is formed with the fiber pigtail that is connected fiber grating, metal shell first half middle part is provided with the boss that the beam of uniform strength is installed, the beam of uniform strength is clipped in the middle of the connecting rod and vertically is connected with connecting rod, flat diaphragm is arranged on the metal shell both sides, connect by connecting rod between the flat diaphragm center, the wire netting sheet is installed in the flat diaphragm outside, and fiber pigtail gathers and passes metal shell.
2. optical fibre grating flushing monitoring sensor according to claim 1, it is characterized in that: further comprising the connection steel-pipe pile that is anchored at the target sidewall, connect steel-pipe pile and comprise pile cover, measuring section, anchoring section and stake point, sensing probe is packed into to connect in the steel-pipe pile measuring section and axially and with being connected steel-pipe pile is tightly connected perpendicular to connecting steel-pipe pile, and fiber pigtail passes metal shell and is aggregated into the side that connects steel-pipe pile measuring section top and passes the connection steel-pipe pile.
3. optical fibre grating flushing monitoring sensor according to claim 2 is characterized in that: described connecting rod is the middle common solid round rod that has two lobe bayonet sockets.
4. optical fibre grating flushing monitoring sensor according to claim 3 is characterized in that: the end sides perforate of the described beam of uniform strength.
5. optical fibre grating flushing monitoring sensor according to claim 4 is characterized in that: described flat diaphragm central authorities are provided with boss, and boss central authorities are provided with the hole of passing for connecting rod.
6. optical fibre grating flushing monitoring sensor according to claim 5, it is characterized in that: described metal shell two ends are provided with the metal crimp ring plate, be provided with rubber sheet gasket between metal shell end and the flat diaphragm and between flat diaphragm and the metal crimp ring plate, wire netting sheet and metal crimp ring plate by screw fixings on metal shell.
7. optical fibre grating flushing monitoring sensor according to claim 6 is characterized in that: described fiber pigtail Correspondent is crossed the seal tube that passes the connection steel-pipe pile and is passed the connection steel-pipe pile.
8. the method for making of an optical fibre grating flushing monitoring sensor, metal shell is divided into the first half, Lower Half, pressure ring sheet four parts at two ends, the left and right sides are processed assembling, the beam of uniform strength is installed at first half central protrusion place, fiber pigtail is drawn by aperture, sealing then, two parts couple together into tubular up and down, end sides perforate on brutal, connecting rod vertically is connected with the beam of uniform strength, the prefabricated boss of flat diaphragm central authorities, and in the punching of boss central authorities, connecting rod cooperates with the hole and glueds joint, the fiber pigtail of each probe is aggregated into the side of stake top section, connects by seal tube and draws steel pipe, and each flexible pipe is gathering by house steward to the water surface, it is characterized in that: the processing technology of the beam of uniform strength is for brutal mould such as together entering with optical fiber with fibrous bundle by shaping at fibre reinforced plastics in the process, between FRP cloth,, be squeezed into the FRP plate of compound FBG again by laminates, then the FRP plate be processed into the FRP beam respectively along two fiber gratings of the parallel placement in precalculated position of the length direction of beam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007101443045A CN100538279C (en) | 2007-09-13 | 2007-09-13 | Optical fibre grating flushing monitoring sensor and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007101443045A CN100538279C (en) | 2007-09-13 | 2007-09-13 | Optical fibre grating flushing monitoring sensor and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101122478A true CN101122478A (en) | 2008-02-13 |
| CN100538279C CN100538279C (en) | 2009-09-09 |
Family
ID=39084908
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2007101443045A Expired - Fee Related CN100538279C (en) | 2007-09-13 | 2007-09-13 | Optical fibre grating flushing monitoring sensor and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100538279C (en) |
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102288147A (en) * | 2011-05-10 | 2011-12-21 | 大连理工大学 | Device for measuring scouring depth monitored based on active temperature control distributed temperature |
| CN102445160A (en) * | 2011-11-09 | 2012-05-09 | 东南大学 | Long-gauge fiber grating scour sensor, manufacturing method thereof, and installation and laying method thereof, and scour monitoring system formed by long-gauge fiber grating scour sensors |
| CN102519629A (en) * | 2011-12-06 | 2012-06-27 | 昆明理工大学 | Use method of dual-membrane type soil pressure sensor based on hydraulic transmission |
| CN102936903A (en) * | 2012-11-22 | 2013-02-20 | 北京科力安监测技术有限公司 | Method for detecting test pile stress and strain of PHC (Prestressed High-Strength Concrete) pipe pile |
| CN103017674A (en) * | 2012-12-24 | 2013-04-03 | 东南大学 | Cantilever pier scour monitoring device based on fiber Bragg grating sensors |
| CN103017675A (en) * | 2012-12-24 | 2013-04-03 | 东南大学 | Button pier sour monitoring device based on FBG (fiber Bragg grating) sensors |
| CN103076063A (en) * | 2013-01-21 | 2013-05-01 | 南京理工大学 | Optical fiber grating water and soil interface sensor and manufacturing and installation method thereof |
| CN103234723A (en) * | 2013-04-24 | 2013-08-07 | 南京理工大学 | Vibrating scouring sensor |
| CN103675798A (en) * | 2013-12-02 | 2014-03-26 | 法雷奥汽车内部控制（深圳）有限公司 | Sealed and waterproof ultrasonic probe |
| CN104482876A (en) * | 2014-12-21 | 2015-04-01 | 天津大学前沿技术研究院有限公司 | Chirp fiber grating-based concrete abrasion and cavitation erosion depth real-time monitoring system |
| CN107121158A (en) * | 2017-06-21 | 2017-09-01 | 西北工业大学 | A kind of internal enclosed cantilever beam fiber-optic grating sensor |
| CN110715632A (en) * | 2019-12-06 | 2020-01-21 | 浙江省水利河口研究院 | Special terminal for prediction and early warning of local scouring depth of pier of estuary of strong tide |
| CN110793675A (en) * | 2019-11-19 | 2020-02-14 | 大连理工大学 | Fiber grating soil pressure sensor |
| CN112146587A (en) * | 2020-09-11 | 2020-12-29 | 张东昱 | Bridge foundation scouring monitoring sensor and monitoring data analysis method thereof |
| CN113587821A (en) * | 2021-06-30 | 2021-11-02 | 大连理工大学 | Optical fiber sensor for monitoring relative slippage of steel-concrete composite structure interface |
| CN113866215A (en) * | 2021-09-27 | 2021-12-31 | 中交第二航务工程局有限公司 | Attached type bridge pile foundation scouring product real-time monitoring system and method |
| CN114459403A (en) * | 2022-02-09 | 2022-05-10 | 广东国鸿氢能科技有限公司 | Rapid detection tool and detection method for fuel cell stack |
-
2007
- 2007-09-13 CN CNB2007101443045A patent/CN100538279C/en not_active Expired - Fee Related
Cited By (25)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102288147A (en) * | 2011-05-10 | 2011-12-21 | 大连理工大学 | Device for measuring scouring depth monitored based on active temperature control distributed temperature |
| CN102445160A (en) * | 2011-11-09 | 2012-05-09 | 东南大学 | Long-gauge fiber grating scour sensor, manufacturing method thereof, and installation and laying method thereof, and scour monitoring system formed by long-gauge fiber grating scour sensors |
| CN102519629A (en) * | 2011-12-06 | 2012-06-27 | 昆明理工大学 | Use method of dual-membrane type soil pressure sensor based on hydraulic transmission |
| CN102936903A (en) * | 2012-11-22 | 2013-02-20 | 北京科力安监测技术有限公司 | Method for detecting test pile stress and strain of PHC (Prestressed High-Strength Concrete) pipe pile |
| CN103017675B (en) * | 2012-12-24 | 2016-02-10 | 东南大学 | A kind of push button pier subsidence monitoring device based on Bragg grating sensor |
| CN103017674A (en) * | 2012-12-24 | 2013-04-03 | 东南大学 | Cantilever pier scour monitoring device based on fiber Bragg grating sensors |
| CN103017675A (en) * | 2012-12-24 | 2013-04-03 | 东南大学 | Button pier sour monitoring device based on FBG (fiber Bragg grating) sensors |
| CN103076063A (en) * | 2013-01-21 | 2013-05-01 | 南京理工大学 | Optical fiber grating water and soil interface sensor and manufacturing and installation method thereof |
| CN103076063B (en) * | 2013-01-21 | 2014-12-17 | 南京理工大学 | Optical fiber grating water and soil interface sensor and manufacturing and installation method thereof |
| CN103234723B (en) * | 2013-04-24 | 2016-01-20 | 南京理工大学 | Oscillatory type scour sensor |
| CN103234723A (en) * | 2013-04-24 | 2013-08-07 | 南京理工大学 | Vibrating scouring sensor |
| CN103675798A (en) * | 2013-12-02 | 2014-03-26 | 法雷奥汽车内部控制（深圳）有限公司 | Sealed and waterproof ultrasonic probe |
| CN104482876A (en) * | 2014-12-21 | 2015-04-01 | 天津大学前沿技术研究院有限公司 | Chirp fiber grating-based concrete abrasion and cavitation erosion depth real-time monitoring system |
| CN104482876B (en) * | 2014-12-21 | 2017-09-05 | 天津大学前沿技术研究院有限公司 | Concrete abrasion and cavitation deepness real-time monitoring system based on chirped fiber grating |
| CN107121158A (en) * | 2017-06-21 | 2017-09-01 | 西北工业大学 | A kind of internal enclosed cantilever beam fiber-optic grating sensor |
| CN107121158B (en) * | 2017-06-21 | 2019-08-13 | 西北工业大学 | A kind of internal enclosed cantilever beam fiber-optic grating sensor |
| CN110793675A (en) * | 2019-11-19 | 2020-02-14 | 大连理工大学 | Fiber grating soil pressure sensor |
| CN110715632A (en) * | 2019-12-06 | 2020-01-21 | 浙江省水利河口研究院 | Special terminal for prediction and early warning of local scouring depth of pier of estuary of strong tide |
| CN110715632B (en) * | 2019-12-06 | 2021-08-17 | 浙江省水利河口研究院 | Special terminal for prediction and early warning of local scouring depth of pier of estuary of strong tide |
| CN112146587A (en) * | 2020-09-11 | 2020-12-29 | 张东昱 | Bridge foundation scouring monitoring sensor and monitoring data analysis method thereof |
| CN112146587B (en) * | 2020-09-11 | 2022-06-21 | 张东昱 | Bridge foundation scouring monitoring sensor and monitoring data analysis method thereof |
| CN113587821A (en) * | 2021-06-30 | 2021-11-02 | 大连理工大学 | Optical fiber sensor for monitoring relative slippage of steel-concrete composite structure interface |
| CN113866215A (en) * | 2021-09-27 | 2021-12-31 | 中交第二航务工程局有限公司 | Attached type bridge pile foundation scouring product real-time monitoring system and method |
| CN114459403A (en) * | 2022-02-09 | 2022-05-10 | 广东国鸿氢能科技有限公司 | Rapid detection tool and detection method for fuel cell stack |
| CN114459403B (en) * | 2022-02-09 | 2023-10-20 | 国鸿氢能科技(嘉兴)股份有限公司 | Rapid detection tool and detection method for fuel cell stack |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100538279C (en) | 2009-09-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100538279C (en) | Optical fibre grating flushing monitoring sensor and preparation method thereof | |
| CN101718544B (en) | static level monitoring system | |
| CN103700221B (en) | A kind of oil and gas pipes mountain flood monitoring method | |
| CN106917420B (en) | A kind of pile foundation scour monitoring device | |
| CN206396814U (en) | A kind of novel bridge pile foundation is under water by flushing monitoring device | |
| CN207244680U (en) | A kind of sunk bridge pile foundation washes away real-time monitoring system | |
| CN100538280C (en) | A kind of high durability optical fiber grating wash out sensor | |
| CN108678034B (en) | Monitoring method based on cubic bridge foundation scouring safety monitoring device | |
| CN107460898A (en) | A kind of sunk bridge pile foundation washes away real-time monitoring system and its monitoring method | |
| CN102445160A (en) | Long-gauge fiber grating scour sensor, manufacturing method thereof, and installation and laying method thereof, and scour monitoring system formed by long-gauge fiber grating scour sensors | |
| CN102288147A (en) | Device for measuring scouring depth monitored based on active temperature control distributed temperature | |
| CN103076063B (en) | Optical fiber grating water and soil interface sensor and manufacturing and installation method thereof | |
| CN103700223B (en) | A kind of oil and gas pipes mountain flood monitoring system | |
| CN101625273B (en) | Fiber bragg grating osmometer | |
| CN207147550U (en) | A kind of new Dam Safety Monitoring Automation measure and control device | |
| CN203177924U (en) | Water level monitoring device based on three optical fiber grating structures | |
| CN104132714A (en) | Automatic ultrasonic water level monitoring device | |
| CN101923057A (en) | BOTDR (Brillouin Optical Time-Domain Reflectometer) fiber optical corrosive sensor | |
| CN201266072Y (en) | Miniature built-in cantilever beam type displacement gage used for geomechanics model experiment | |
| CN206496754U (en) | A kind of wedge structure fiber grating dislocation meter | |
| CN103234723B (en) | Oscillatory type scour sensor | |
| CN202361956U (en) | FBG (fiber bragg grating) scouring sensor with long gauge length and scouring monitoring system thereof | |
| CN102829987A (en) | Method for measuring ice load of ocean platform | |
| CN210562351U (en) | Wharf sheet pile stress monitoring device based on optical fiber sensing technology | |
| CN103700222A (en) | Method for establishing oil-gas pipeline torrential flood disaster monitoring system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090909 Termination date: 20100913 |