CN203337110U - Sleeve type optical fiber grating reinforcement meter - Google Patents
Sleeve type optical fiber grating reinforcement meter Download PDFInfo
- Publication number
- CN203337110U CN203337110U CN2013204474370U CN201320447437U CN203337110U CN 203337110 U CN203337110 U CN 203337110U CN 2013204474370 U CN2013204474370 U CN 2013204474370U CN 201320447437 U CN201320447437 U CN 201320447437U CN 203337110 U CN203337110 U CN 203337110U
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- fiber grating
- optical fiber
- sleeve
- fiber
- pigtail
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Abstract
The utility model belongs to the technical field of a sensing technology, relates to a device which is used for detecting the structure safety condition in civil engineering, and relates to a sleeve type optical fiber grating reinforcement meter which comprises a sleeve. A groove which axially extends is arranged on the surface of the middle part of the sleeve. A first optical fiber grating, a second optical fiber grating, a third optical fiber grating and a fourth optical fiber grating are uniformly distributed and arranged in the groove along the circumferential direction. The first optical fiber grating is connected with a first pigtail. The second optical fiber grating is connected with a second pigtail. The third optical fiber grating is connected with a third pigtail. The fourth optical fiber grating is connected with a fourth pigtail. External threads are arranged on circumference surfaces on front and back ends of the sleeve. A protection tube is connected with the external circumference surface of the sleeve through the external threads. The optical fiber grating reinforcement meter has the advantages of good durability, high measurement accuracy and no electromagnetic field interference, and uses the optical fiber gratings to carry out reinforcement strain detection.
Description
Technical field
The utility model belongs to field of sensing technologies, relates to specifically the device for detection of structural safety situation in civil engineering work, specifically a kind of telescopic fiber grating reinforcing rib meter.
Background technology
In civil engineering work, monitoring structural health conditions (SHM) has great importance to the long-term safety operation that guarantees civil structure.Reinforcing rib meter is measure the item the most basic in monitoring structural health conditions, and it is for monitoring the strain of Reinforcing Steel Bar In Reinforced Concrete Structure, important data is provided safely can to evaluation structure.Traditional reinforcing rib meter is based on electric class and measures sensing technology, as resistance strain gage, string wire meter etc., is subject to electromagnetic interference (EMI) and poor durability, can't meet the long term monitoring of civil structure.
Fiber-optic grating sensor is a kind of Smart Sensor, and its moisture resistance, anti-corruption, permanance are strong, can under rugged surroundings, work, and good reliability, strong interference immunity, and easily form sensing network.Fiber-optic grating sensor, because have these advantages, has obtained the extensive concern in the world.Fiber-optic grating sensor is applied in the measurement of the multiple physical quantitys such as temperature, strain, pressure, displacement, acceleration, flow in the world at present.
When existing fiber grating reinforcing rib meter is installed, reinforcing rib meter and tested reinforcing bar need to be welded or colligation, as the patent No. be ZL200620107955.8 " non-enhanced fiber grating reinforcing rib meter ".Be connected and make connected node and the equicohesive requirement of reinforcing bar to be measured with reinforcing bar to be measured is concentric because it can not meet reinforcing rib meter, therefore can not react truly the strained situation of reinforcing bar to be measured.Therefore be necessary to propose a kind of novel reinforcing rib meter.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, a kind of telescopic fiber grating reinforcing rib meter simple in structure, ingenious, rational is provided, this reinforcing rib meter endurance quality is good, measuring accuracy is high, be not subject to the fiber grating reinforcing rib meter of the interference of electromagnetic field, utilizes fiber grating to carry out the reinforcing bar strain detecting.
The technical scheme provided according to the utility model: a kind of telescopic fiber grating reinforcing rib meter, it is characterized in that: comprise sleeve, described sleeve middle part surface is provided with axially extended groove, circumferential uniform the first fiber grating, the second fiber grating, the 3rd fiber grating, the 4th fiber grating of arranging in edge in described groove, wherein the first fiber grating is connected with the first tail optical fiber, the second fiber grating is connected with the second tail optical fiber, the 3rd fiber grating is connected with the 3rd tail optical fiber, and the 4th fiber grating is connected with the 4th tail optical fiber; Sleeve rear and front end periphery is provided with external thread, and protection tube is connected on the sleeve outer circumference surface by this external thread.
As further improvement of the utility model, described barrel bore rear and front end is respectively arranged with internal thread.
Compared with prior art, advantage is the utility model: the utility model is simple, compact and reasonable for structure; By internal thread of sleeve, reinforcing bar to be measured and reinforcing rib meter can be realized to concentric is connected, make reinforcing rib meter can truly reflect the strained situation of reinforcing bar to be measured.
The accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Fig. 2 is A-A cut-open view in Fig. 1.
Embodiment
Below in conjunction with concrete drawings and Examples, the utility model is described in further detail.
As shown in Figure 1 and Figure 2, comprise protection tube 1, the first fiber grating 2, the first tail optical fiber 3, sleeve 4, the second tail optical fiber 5, the second fiber grating 6, the 3rd fiber grating 7, the 4th fiber grating 8, groove 9 etc.
As shown in Figure 1 and Figure 2, the utility model is a kind of telescopic fiber grating reinforcing rib meter, comprise sleeve 4, described sleeve 4 middle part surfaces are provided with axially extended groove 9, the interior edge of described groove 9 is uniform the first fiber grating 2, the second fiber grating 6, the 3rd fiber grating 7, the 4th fiber grating 8 of arranging circumferentially, wherein the first fiber grating 2 is connected with the first tail optical fiber 3, the second fiber grating 6 is connected with the second tail optical fiber 5, the 3rd fiber grating 7 is connected with the 3rd tail optical fiber, and the 4th fiber grating 8 is connected with the 4th tail optical fiber; Sleeve 4 rear and front end peripheries are provided with external thread, and protection tube 1 is connected on sleeve 4 outer circumference surfaces by this external thread.
Described sleeve 4 inner chamber rear and front ends are respectively arranged with internal thread.
Principle of work of the present utility model is: during installation, the first tail optical fiber 3, the second tail optical fiber 5, the 3rd tail optical fiber being connected with acquisition instrument with the 4th tail optical fiber, is with sleeve 4, by screw thread, to tighten after straight thread reinforced bar by tested steel bar thick.When reinforcing bar bears external loads and is out of shape, sleeve 4 also will bear corresponding load and distortion, stick on like this first fiber grating 2 on sleeve 4 surfaces, the second fiber grating 6, the 3rd fiber grating 7 and the 4th fiber grating 8 will produce cooperative transformation with sleeve 4, make the first fiber grating 2, the second fiber grating 6, the skew that the centre wavelength of the 3rd fiber grating 7 and the 4th fiber grating 8 is certain because strain produces, can draw the first fiber grating 2 by analyzing, the second fiber grating 6, relation between the centre wavelength of the 3rd fiber grating 7 and the 4th fiber grating 8 and reinforcing bar distortion, thereby realize the detection of reinforcing bar strain.
The utility model utilizes fiber grating to carry out the reinforcing bar strain detecting, fiber grating is a kind of strain sensor of function admirable, its antijamming capability is strong, be not subject to the interference of electromagnetic field, also do not affect external electromagnetic field, electrical insulation capability is good, good endurance, measure highly sensitive, measuring accuracy is high, can realize point measurement and distributed measurement; The first fiber grating 2, the second fiber grating 6, the 3rd fiber grating 7 and the 4th fiber grating 8 symmetries stick on sleeve surface, can improve measuring accuracy.Internal thread of sleeve by reinforcing rib meter is connected with reinforcing bar to be measured is concentric, can react truly the strained situation of reinforcing bar to be measured.In addition, the utility model is simple in structure, explosion-proof is good, is not subject to the interference of electromagnetic field, can be widely used in the reinforcing bar strain detecting of the severe working environment such as civil engineering work.
Claims (2)
1. a telescopic fiber grating reinforcing rib meter, it is characterized in that: comprise sleeve (4), described sleeve (4) middle part surface is provided with axially extended groove (9), circumferential uniform the first fiber grating (2) that arranges in edge in described groove (9), the second fiber grating (6), the 3rd fiber grating (7), the 4th fiber grating (8), wherein the first fiber grating (2) is connected with the first tail optical fiber (3), the second fiber grating (6) is connected with the second tail optical fiber (5), the 3rd fiber grating (7) is connected with the 3rd tail optical fiber, the 4th fiber grating (8) is connected with the 4th tail optical fiber, sleeve (4) rear and front end periphery is provided with external thread, and protection tube (1) is connected on sleeve (4) outer circumference surface by this external thread.
2. telescopic fiber grating reinforcing rib meter as claimed in claim 1, it is characterized in that: described sleeve (4) inner chamber rear and front end is respectively arranged with internal thread.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013204474370U CN203337110U (en) | 2013-07-25 | 2013-07-25 | Sleeve type optical fiber grating reinforcement meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013204474370U CN203337110U (en) | 2013-07-25 | 2013-07-25 | Sleeve type optical fiber grating reinforcement meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203337110U true CN203337110U (en) | 2013-12-11 |
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ID=49705780
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013204474370U Expired - Lifetime CN203337110U (en) | 2013-07-25 | 2013-07-25 | Sleeve type optical fiber grating reinforcement meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203337110U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104215214A (en) * | 2014-09-29 | 2014-12-17 | 东南大学 | Coal mine tunnel strain collecting device with adjustable length |
| CN105043281A (en) * | 2015-05-12 | 2015-11-11 | 东北电力大学 | Fiber grating strain sensor and manufacturing method and forming die thereof |
| CN106840013A (en) * | 2016-12-29 | 2017-06-13 | 北京希卓信息技术有限公司 | Sliding monitoring sensor and Slope Sliding strain monitoring system |
-
2013
- 2013-07-25 CN CN2013204474370U patent/CN203337110U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104215214A (en) * | 2014-09-29 | 2014-12-17 | 东南大学 | Coal mine tunnel strain collecting device with adjustable length |
| CN105043281A (en) * | 2015-05-12 | 2015-11-11 | 东北电力大学 | Fiber grating strain sensor and manufacturing method and forming die thereof |
| CN105043281B (en) * | 2015-05-12 | 2017-09-05 | 东北电力大学 | A kind of fiber Bragg grating strain sensor and preparation method thereof and mould |
| CN106840013A (en) * | 2016-12-29 | 2017-06-13 | 北京希卓信息技术有限公司 | Sliding monitoring sensor and Slope Sliding strain monitoring system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131211 |
|
| CX01 | Expiry of patent term |