CN204666102U - Flush type airfield pavement FBG strain monitoring device - Google Patents
Flush type airfield pavement FBG strain monitoring device Download PDFInfo
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- CN204666102U CN204666102U CN201520400907.7U CN201520400907U CN204666102U CN 204666102 U CN204666102 U CN 204666102U CN 201520400907 U CN201520400907 U CN 201520400907U CN 204666102 U CN204666102 U CN 204666102U
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Abstract
A kind of flush type airfield pavement FBG strain monitoring device, it comprises two FBG sensors, two aluminum alloy beams, armored optical cable, four stationary fixtures, two titanium steel alloy brackets, two build-in bearings and two FC flanged ends; Two build-in bearing settlement lower concrete in light hole, airfield runway upper track face on the surface; In each titanium steel alloy bracket, top is formed with horizontal preformed hole respectively, and lower end is fixed on build-in bearing; Enclosed inside FBG sensor of every root aluminum alloy beams, two ends are inserted in two horizontal preformed holes on two titanium steel alloy brackets respectively, and are fixed by stationary fixture; Two FBG sensors are connected by armored optical cable, and the two ends of armored optical cable connect a FC flanged ends respectively.The utility model advantage: high precision, high reliability, measuring point survival rate high, quasi-distributed measurement easy without the need to Embedment Construction, installation process, moisture resistance waterproof, stable and good endurance.
Description
Technical field
The utility model belongs to strain measurement and face, road structural safety technical field, is specifically related to a kind of flush type airfield pavement FBG strain monitoring device.
Background technology
Airfield runway is the critical infrastructures in Airport Operation process, is a very important job, can understands its structural health in time to the assessment of the stress of concrete road surface structure.At present, the runway lossless detection method generally adopted both at home and abroad has: ultrasound wave rebound method, deflection basin method of dropping hammer (FWD), stable state dynaflector method etc., but these methods above-mentioned exist many restrictions in technological means and using standard etc.Wherein ultrasound wave rebound method originates from road surface detection, and its principle makes amplification acoustical signal through pavement structure, applies stress and change frequency generator, obtaining road surface met with stresses by frequency-splitting.Although the method can obtain transversal section, road surface 3-D view, be difficult to extensively should due to the conditions such as Measuring Time is tediously long, price is high and timeliness is short restriction.Deflection basin method of dropping hammer (FWD) has ripe theoretical foundation and extensive application experience, and its principle controls hydraulic pressure lift by computing machine and discharge a weight to apply impulsive load to face, road, goes out Pavement Elastic Modulus by equivalent layer method inverse.But the shortcoming that the method exists is damage runway risk and impact load grade and true aircraft wheel load still exist gap.Stable state dynaflector method is by placing a quiet lotus on face, road, utilizes live load generator to apply cyclical loads.Its subject matter is to need the preset dead load being greater than live load amplitude, and this quiet lotus can change plane materiel material initial stress state and rigidity, has a direct impact test result.
FBG (Bragg grating) sensor based on Fiber Bragg Grating technology be a kind of low energy consumption, high timeliness and dynamic reflection pavement behavior emerging method of testing.Its principle of work is when light wave passes Bragg grating in FBG sensor, wherein a part of light wave is reflected back formation incident light wave, the light wave do not met the demands then forms transmitted light wave, set up the relation of optical fibre refractivity relative phase shift and structural strain with this, real non-destructive detection requirement can be met.Compared with traditional resistor strainometer, FBG transducer sensitivity is high, and antijamming capability is strong, optical wavelength and Distance Transmission loss is little, and signal stabilization is good.
At present, draw the measurement of distortion still comparatively difficult to concrete pavement slab horizontal curved, common way is embedded near the bottom of concrete pavement slab on airfield pavement by FBG sensor.But because FBG size sensor is little, the very thin fragility of Transmission Fibers, therefore easy because of built and the equipment that vibrates physical shock and fracture, so be difficult to ensure measuring point survival rate, and later period maintenance difficulty is with high costs, wrap surface construction is had a significant impact, is not suitable for large area and widely uses.
Summary of the invention
In order to solve the problem, the purpose of this utility model is to provide a kind of without the need to destroying face structure, is applicable to the flush type airfield pavement FBG strain monitoring device of face, existing road, airport structure.
In order to achieve the above object, the flush type airfield pavement FBG strain monitoring device that the utility model provides comprises two FBG sensors, two aluminum alloy beams, armored optical cable, four stationary fixtures, two titanium steel alloy brackets, two build-in bearings and two FC flanged ends; Wherein, two build-in bearing standoff distances are arranged at the lower concrete in light hole, airfield runway upper track face on the surface; The middle part of each titanium steel alloy bracket and top have been formed through a horizontal preformed hole respectively, and lower end is fixed on a build-in bearing; Enclosed inside FBG sensor of every root aluminum alloy beams, two ends are inserted respectively and are arranged in two horizontal preformed holes corresponding on two titanium steel alloy brackets, and are fixed by stationary fixture; Two FBG sensors are connected by armored optical cable, and the line outlet of armored optical cable is positioned at aluminum alloy beams end, and the two ends of armored optical cable connect a FC flanged ends respectively simultaneously.
Described FBG sensor adopts the armouring double grid fiber-optic grating sensor of band temperature compensation.
Described FC flanged ends is connected with fiber Bragg grating (FBG) demodulator simultaneously.
The flush type airfield pavement FBG strain monitoring device tool that the utility model provides has the following advantages: have the advantages such as high precision, high reliability, measuring point survival rate high, quasi-distributed measurement easy without the need to Embedment Construction, installation process, moisture resistance waterproof, stable and good endurance.Meanwhile, should become monitoring device encapsulation complete, assembly type is produced, and can change physical dimension, solve the problems such as later maintenance replacing according to engineering requirements, and the long term monitoring on a large scale for the change of airport concrete pavement internal strain has practical significance.
Accompanying drawing explanation
The flush type airfield pavement FBG strain monitoring device-added structure schematic diagram that Fig. 1 provides for the utility model.
Embodiment
Below in conjunction with the drawings and specific embodiments, the flush type airfield pavement FBG strain monitoring device that the utility model provides is described in detail.
As shown in Figure 1, the flush type airfield pavement FBG strain monitoring device that the utility model provides comprises two FBG sensors, 1, two aluminum alloy beams 2, armored optical cable 3, four stationary fixtures 4, two titanium steel alloy brackets 5, two build-in bearings 6 and two FC flanged ends 7; Wherein, two build-in bearing 6 standoff distances are arranged at the lower concrete 8 in light hole, airfield runway upper track face on the surface; The middle part of each titanium steel alloy bracket 5 and top have been formed through a horizontal preformed hole respectively, and lower end is fixed on a build-in bearing 6; Enclosed inside FBG sensor 1 of every root aluminum alloy beams 2, two ends are inserted respectively and are arranged in two horizontal preformed holes corresponding on two titanium steel alloy brackets 5, and are fixed by stationary fixture 4; Two FBG sensors 1 are connected by armored optical cable 3, and the line outlet of armored optical cable 3 is positioned at aluminum alloy beams 2 end, and the two ends of armored optical cable 3 connect a FC flanged ends 7 respectively simultaneously.
Described FBG sensor 1 adopts the armouring double grid fiber-optic grating sensor of band temperature compensation.
Described FC flanged ends 7 is connected with fiber Bragg grating (FBG) demodulator simultaneously.
Installation and the use procedure of the flush type airfield pavement FBG strain monitoring device now provided by the utility model are described below:
First opened the cover plate in light hole, airfield runway upper track face by staff during installation, then two aluminum alloy beams 2 are each passed through two horizontal preformed holes on two titanium steel alloy brackets 5, and utilize stationary fixture 4 that titanium steel alloy bracket 5 and aluminum alloy beams 2 are linked to be entirety, build-in bearing 6 is arranged at the lower concrete 8 in light hole, airfield runway upper track face on the surface afterwards, then the lower end of a titanium steel alloy bracket 5 and a build-in bearing 6 is connected and fixed.Afterwards FC flanged ends 7 is connected to fiber Bragg grating (FBG) demodulator output channel.In actual motion uses, the FBG sensor 1 of aluminum alloy beams 2 enclosed inside detects horizontal curved in pavement slab that aircraft traveling load causes in real time and draws distortion, then fiber Bragg grating (FBG) demodulator is sent to through armored optical cable 3, FC flanged ends 7, the lightwave signal received carries out changing, recording and data preservation by fiber Bragg grating (FBG) demodulator again, and obtain maximum flexural tensile stress bottom pavement slab by software conversion, analyze use for staff.
Claims (3)
1. a flush type airfield pavement FBG strain monitoring device, is characterized in that: it comprises two FBG sensors (1), two aluminum alloy beams (2), armored optical cable (3), four stationary fixtures (4), two titanium steel alloy brackets (5), two build-in bearings (6) and two FC flanged ends (7); Wherein, two build-in bearing (6) standoff distances are arranged at the lower concrete (8) in light hole, airfield runway upper track face on the surface; Middle part and the top of each titanium steel alloy bracket (5) have been formed through a horizontal preformed hole respectively, and lower end is fixed on a build-in bearing (6); Enclosed inside FBG sensor (1) of every root aluminum alloy beams (2), two ends are inserted respectively and are arranged in upper two the corresponding horizontal preformed holes of two titanium steel alloy brackets (5), and are fixed by stationary fixture (4); Two FBG sensors (1) are connected by armored optical cable (3), and the line outlet of armored optical cable (3) is positioned at aluminum alloy beams (2) end, the two ends of armored optical cable (3) connect a FC flanged ends (7) respectively simultaneously.
2. flush type airfield pavement FBG strain monitoring device according to claim 1, is characterized in that: described FBG sensor (1) adopts the armouring double grid fiber-optic grating sensor of band temperature compensation.
3. flush type airfield pavement FBG strain monitoring device according to claim 1, is characterized in that: described FC flanged ends (7) is connected with fiber Bragg grating (FBG) demodulator simultaneously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520400907.7U CN204666102U (en) | 2015-06-11 | 2015-06-11 | Flush type airfield pavement FBG strain monitoring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520400907.7U CN204666102U (en) | 2015-06-11 | 2015-06-11 | Flush type airfield pavement FBG strain monitoring device |
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| Publication Number | Publication Date |
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| CN204666102U true CN204666102U (en) | 2015-09-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520400907.7U Expired - Fee Related CN204666102U (en) | 2015-06-11 | 2015-06-11 | Flush type airfield pavement FBG strain monitoring device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108469277A (en) * | 2018-04-28 | 2018-08-31 | 中国民航大学 | A kind of smart tags line apparatus based on airport security operational monitoring |
| CN109186826A (en) * | 2018-09-10 | 2019-01-11 | 中国民航大学 | A kind of board bottom flexural tensile stress monitoring system and method for existing road face structure |
| CN112097977A (en) * | 2020-08-25 | 2020-12-18 | 东南大学 | Fixing device and mounting method suitable for embedded sensor in cement concrete pavement |
-
2015
- 2015-06-11 CN CN201520400907.7U patent/CN204666102U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108469277A (en) * | 2018-04-28 | 2018-08-31 | 中国民航大学 | A kind of smart tags line apparatus based on airport security operational monitoring |
| CN109186826A (en) * | 2018-09-10 | 2019-01-11 | 中国民航大学 | A kind of board bottom flexural tensile stress monitoring system and method for existing road face structure |
| CN112097977A (en) * | 2020-08-25 | 2020-12-18 | 东南大学 | Fixing device and mounting method suitable for embedded sensor in cement concrete pavement |
| CN112097977B (en) * | 2020-08-25 | 2022-03-11 | 东南大学 | Fixing device and mounting method suitable for embedded sensor in cement concrete pavement |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150923 Termination date: 20160611 |