CN2276150Y - Sliding optical fiber sensor - Google Patents
Sliding optical fiber sensor Download PDFInfo
- Publication number
- CN2276150Y CN2276150Y CN 96233472 CN96233472U CN2276150Y CN 2276150 Y CN2276150 Y CN 2276150Y CN 96233472 CN96233472 CN 96233472 CN 96233472 U CN96233472 U CN 96233472U CN 2276150 Y CN2276150 Y CN 2276150Y
- Authority
- CN
- China
- Prior art keywords
- optical fiber
- buried
- buried handle
- slippage
- handle
- 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.)
- Expired - Fee Related
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Abstract
The utility model relates to a sliding optical fiber sensor, comprising two abutting test boxes 4, 5 whose abutting end surfaces are sliding surfaces for monitoring. Preembedded handles 2, 3 which are thin copper pipes are respectively arranged on the bottoms 6, 7 of the test boxes; an optical fiber 1 which passes through the preembedded handles 2, 3 extended outwards, one end of the optical fiber passes through an objected to be tested is connected to an OTDR meter, and the other end passes through a bearing which act as a fixed pulley 8 and is connected with a counterweight 9.
Description
The utility model is relevant with the Fibre Optical Sensor of slippage of monitoring building reservation seam and cracking.
Existing slippage Fibre Optical Sensor is an orientation angie type slippage Fibre Optical Sensor, and as shown in Figure 1, the pre-buried handle 2,3 that is connected by optical fiber 1 with its two ends is formed, and the optical fiber 1 between the pre-buried handle 2,3 is by monitored crack or glide plane, with its angle be Q
0Optical fiber 1 is connected with OTDR or light power meter photometer by an end of pre-buried handle.Its test philosophy such as Fig. 2, shown in 3: when open or during slippage in the crack, the knuckle that causes optical fiber 1 tension and optical fiber 1 and two handles changes, produce the variation of Δ Q, optical loss by optical fiber 1 changes, and utilizes the attenuation change situation of the light that the OTDR photometer measures to reflect crack slippage or open size.But measurement range is very little, can only measure 1cm with the interior slippage or the variation of cracking, and exceeding this scope optical fiber will be broken.Measuring accuracy and measurement range are non-adjustable.Can not multiple spot, the intrinsic crack of distributed overall monitor works.
The purpose of this utility model provides a kind of simple in structure, and measurement range is wide, and measuring accuracy and scope are adjustable, but the slippage Fibre Optical Sensor in multiple spot, the intrinsic crack of distributed earth comprehensive monitoring works.
The utility model has the test chamber 4,5 of two butt joints, and its butt joint end face is monitored.Pre-buried handle 2,3 is a tubule, is loaded on respectively on the wall 6,7 of test chamber.Optical fiber 1 is positioned at the test chamber of butt joint, passes pre-buried handle 2,3 and stretches out, and one is terminated on the instrument.
The optical fiber 1 that passes pre-buried handle 2 of the present utility model can be connected with counterweight 9 by fixed pulley 8, and is connected with instrument by counterweight 9.
Test chamber of the present utility model can be testing cassete, and the through hole on the bottom of pre-buried handle 2 and testing cassete 4 movingly.Pre-buried handle 2 can stretch in testing cassete, regulates the length of the optical fiber between the two pre-buried handles, and pre-buried handle 2 is fixed with bottom position behind the setting fiber lengths.Pre-buried handle 3 is fixing all the time with the bottom position of testing cassete 5.Optical fiber and pre-buried handle are movingly.
The optical fiber that passes pre-buried handle 3 of the present utility model can be connected with the extended optical fiber 1 of another fiber slide displacement sensor.
The optical fiber that passes pre-buried handle 2,3 of the present utility model can be connected with the extended optical fiber 1 of another fiber slide displacement sensor respectively.
Test philosophy of the present utility model is as follows:
When monitored facial disfigurement (fracture open or slippage), cause testing cassete inner fiber 1 and two pre-buried handles 2,3 two bendings take place, the change of bending makes by the optical loss in the optical fiber 1 and changes, size and position that OTDR instrument that utilization is connected with optical fiber 1 one ends or light power meter can measure attenuation change, thus the slippage of monitoring thing or the size and the position of cracking measured.
The utlity model has following advantage:
1, can adjust measuring accuracy and test specification arbitrarily.
The length of regulating the stretching force of optical fiber and regulating the optical fiber between the two pre-buried handles by the weight that changes balancing weight realizes the adjustment of the scope of measuring accuracy.
2, but the utility model several or dozens of be connected on the optical fiber, utilize the OTRR instrument can once test several or dozens of monitoring point, carry out continuously, the indiscriminate comprehensively of multiple spot surveyed, and can carry out systematic analysis to slippage and cracking, and be especially suitable to large-scale hydroelectric project and landslide monitoring.
3, test specification of the present utility model is wide, and the change in displacement of a test point can allow more than 10cm, and applicable to the Sliding Structures of any size.
Fig. 1 is traditional slippage optical fibre sensor structure figure.
Fig. 2 is that traditional slippage Fibre Optical Sensor is surveyed the fracture open synoptic diagram.
Fig. 3 is that traditional slippage Fibre Optical Sensor is surveyed crack slippage synoptic diagram.
Fig. 4 is the utility model structural drawing.
Fig. 5 is the A-A cut-open view of Fig. 4.
Fig. 6 is the vertical view of Fig. 4.
Fig. 7 is counterweight block structure figure.
Following is embodiment of the present utility model:
Testing cassete 4,5 is the semiclosed garden column type of symmetry.Its ring flange 10,11 outer faces are interface.On the bottom 6 of testing cassete 4 boss 12 is arranged.Porose by bottom 6 and boss 12, the copper pipe that φ 5 arranged as pre-buried handle 2 and hole movingly, can be in box the fiber lengths between the telescopic adjustment two pre-buried handles.After the setting position of pre-buried handle 2 is fixed with cementing agent.Pre-buried handle 3 also is φ 5 copper pipes, fixedlys connected all the time with the bottom 7 of testing cassete 5.
Fixed pulley 8 is loaded on the support 13 for bearing.One end of optical fiber 1 is connected with counterweight chassis 14 by fixed pulley, and is connected with the OTDR instrument by the chassis.Can lay balancing weight 15 on the counterweight chassis.Adjustable balance weight.
The extended optical fiber of another slippage sensor of another termination of optical fiber 1.
Claims (5)
1, slippage Fibre Optical Sensor, by the pre-buried handle (2) at optical fiber (1) and two ends, (3) are formed, and it is characterized in that having the test chamber (4) of two butt joints, (5), its butt joint end face is the monitoring glide plane, pre-buried handle (2), and (3) are tubule, be loaded on respectively on the wall of test chamber, optical fiber (1) passes pre-buried handle (2), and (3) stretch out, and one is terminated on the instrument.
2, slippage Fibre Optical Sensor according to claim 1, the optical fiber (1) that it is characterized in that passing pre-buried handle (2) can pass through fixed pulley (8) and be connected with instrument with counterweight (9).
3, slippage Fibre Optical Sensor according to claim 1 and 2, it is characterized in that test chamber is a testing cassete, through hole on pre-buried handle (2) and testing cassete (4) bottom movingly, pre-buried handle (2) can stretch in testing cassete, regulate the length of the optical fiber between the two pre-buried handles, pre-buried handle (2) is fixed with bottom position after setting up fiber lengths, and pre-buried handle (3) is fixing all the time with the bottom position of testing cassete (5), and optical fiber and pre-buried handle are movingly.
4, slippage Fibre Optical Sensor according to claim 1 and 2, the optical fiber (1) that it is characterized in that passing pre-buried handle (3) is connected with an end of the extended optical fiber of another fiber slide displacement sensor (1).
5, fiber slide displacement sensor according to claim 1 is characterized in that passing pre-buried handle (2), and the optical fiber of (3) (1) connects with the different extended optical fiber of another fiber slide displacement sensor (1) respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96233472 CN2276150Y (en) | 1996-07-26 | 1996-07-26 | Sliding optical fiber sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96233472 CN2276150Y (en) | 1996-07-26 | 1996-07-26 | Sliding optical fiber sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2276150Y true CN2276150Y (en) | 1998-03-11 |
Family
ID=33910137
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96233472 Expired - Fee Related CN2276150Y (en) | 1996-07-26 | 1996-07-26 | Sliding optical fiber sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2276150Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108755616A (en) * | 2018-08-22 | 2018-11-06 | 江苏省水利勘测设计研究院有限公司 | A kind of embedded protective device of fibre optical sensor |
| CN109556642A (en) * | 2018-10-26 | 2019-04-02 | 西安理工大学 | A kind of fibre optical sensor for concrete structure crack monitoring |
-
1996
- 1996-07-26 CN CN 96233472 patent/CN2276150Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108755616A (en) * | 2018-08-22 | 2018-11-06 | 江苏省水利勘测设计研究院有限公司 | A kind of embedded protective device of fibre optical sensor |
| CN108755616B (en) * | 2018-08-22 | 2024-02-20 | 江苏省水利勘测设计研究院有限公司 | Optical fiber sensor buries protective device |
| CN109556642A (en) * | 2018-10-26 | 2019-04-02 | 西安理工大学 | A kind of fibre optical sensor for concrete structure crack monitoring |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |