CN204630548U - A kind of Fiber Bragg Grating Displacement Sensor device - Google Patents
A kind of Fiber Bragg Grating Displacement Sensor device Download PDFInfo
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- CN204630548U CN204630548U CN201520151362.0U CN201520151362U CN204630548U CN 204630548 U CN204630548 U CN 204630548U CN 201520151362 U CN201520151362 U CN 201520151362U CN 204630548 U CN204630548 U CN 204630548U
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- displacement sensor
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Abstract
A kind of Fiber Bragg Grating Displacement Sensor device; comprise fiber-optic grating sensor and be positioned at the first web member and second web member at fiber-optic grating sensor two ends; fiber-optic grating sensor comprises connecting link, protection tube and is positioned at spring and the fiber grating sensing element of protection tube; fiber grating sensing element comprises stress grating and the temperature compensation grating of series connection mutually, and the two ends of spring are connected with connecting link with stress grating respectively.Fiber Bragg Grating Displacement Sensor device of the present utility model has the following advantages: 1) carrying temperature compensation grating can carry out temperature compensation by counter stress grating voluntarily.2) be provided with thread adapter thus reduce the setting of landform.3) Fiber Bragg Grating Displacement Sensor device conveniently can be fixed on position to be measured by the form by welding or grouting.
Description
Technical field
The utility model relates to a kind of displacement sensing apparatus, particularly relates to a kind of Fiber Bragg Grating Displacement Sensor device.
Background technology
In the construction and maintenance of bridge, civil building, dykes and dams, conveyance conduit, electric power facility, offshore platform and other large-scale frameworks, the detection in crack is very important, and it is directly connected to people's life, social property and social stability.Existing sensor is the sensor of strain-type.It and secondary instrument such as strainometer, digital voltmeter support the use, and can carry out the excessive measurement of static state in engineering test.Because its core sensing element adopts electrical type strainometer, inevitably bring the shortcoming being subject to electromagnetic interference, long-time stability difference, the need of work under complex environment cannot be met.Now commercially there is fiber grating displacement sensor but the crest of the fiber grating of sensors with auxiliary electrode drifts about with the political reform of temperature, therefore needed to carry out temperature compensation to it; The simultaneously installation of sensors with auxiliary electrode is complicated and require high.
Utility model content
The technical problems to be solved in the utility model overcomes the deficiencies in the prior art, provide a kind of precision high, without the need to carrying out temperature compensation and installing simple Fiber Bragg Grating Displacement Sensor device.
For solving the problems of the technologies described above; the technical scheme that the utility model proposes is: a kind of Fiber Bragg Grating Displacement Sensor device; comprise fiber-optic grating sensor and be positioned at the first web member and second web member at fiber-optic grating sensor two ends; described fiber-optic grating sensor comprises connecting link, protection tube and is positioned at spring and the fiber grating sensing element of protection tube; described fiber grating sensing element comprises stress grating and the temperature compensation grating of series connection mutually, and the two ends of described spring are connected with connecting link with stress grating respectively.Fiber Bragg Grating Displacement Sensor device built-in temperature null grating of the present utility model, can carry out temperature compensation by counter stress grating voluntarily, and the precision of Fiber Bragg Grating Displacement Sensor device of the present utility model is guaranteed.
Above-mentioned Fiber Bragg Grating Displacement Sensor device, preferably, described temperature compensation grating is fixedly connected in protection tube, described protection tube be socketed in one end of connecting link and connecting link in protection tube along the axially-movable of protection tube.The motion of connecting link passes to stress grating with the form of pulling force, and the crest of stress grating moves thus judges the size of connecting link move distance.
Above-mentioned Fiber Bragg Grating Displacement Sensor device, preferably, described first web member comprises and is connected to transmission lever on connecting link and fixture; Described fixture is flexibly connected by set bolt with transmission lever; Described second web member comprises the ball universal joint be fixedly connected with described protection tube and the ball screw be connected with the end of described ball universal joint by hold-open catch.
Above-mentioned Fiber Bragg Grating Displacement Sensor device, preferably, one end of described transmission lever is fixedly connected with connecting link, and the other end is provided with the register pin of a set bolt.
Above-mentioned Fiber Bragg Grating Displacement Sensor device, preferably, described fixture comprises thread adapter, lock nut, ball universal joint and ball screw; One end of described thread adapter is connected and fixed bolt, and the other end connects ball universal joint by connecting screw rod and is fastenedly connected screw rod with lock nut; The end of described ball universal joint fixes ball screw by hold-open catch.Select thread adapter to the impact of the infield thus the restriction of reduction landform that change ball screw by changing in the utility model.
Above-mentioned Fiber Bragg Grating Displacement Sensor device, preferably, described ball screw is connected by the weld part of welder with both sides, crack.
Above-mentioned Fiber Bragg Grating Displacement Sensor device, preferably, described ball screw is connected by the concrete of mechanical screws expansion anchor head and both sides, crack or rock.
Above-mentioned Fiber Bragg Grating Displacement Sensor device, preferably, described ball screw is connected by the concrete of grouting anchor head and both sides, crack or rock.
Compared with prior art, the utility model has the advantage of: 1) Fiber Bragg Grating Displacement Sensor device of the present utility model carries temperature compensation grating and can carry out temperature compensation by counter stress grating voluntarily.2) Fiber Bragg Grating Displacement Sensor device of the present utility model is provided with thread adapter thus reduces the setting of landform.3) Fiber Bragg Grating Displacement Sensor device conveniently can be fixed on position to be measured by the form of welding or be in the milk by Fiber Bragg Grating Displacement Sensor device of the present utility model.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model Fiber Bragg Grating Displacement Sensor device.
Fig. 2 is the partial schematic sectional view along A-A direction in Fig. 1.
Fig. 3 is the structural representation of the utility model Fiber Bragg Grating Displacement Sensor device embodiment one.
Fig. 4 is the structural representation of the utility model Fiber Bragg Grating Displacement Sensor device embodiment two.
Fig. 5 is the structural representation of the utility model Fiber Bragg Grating Displacement Sensor device embodiment three.
Marginal data
1, fiber-optic grating sensor; 2, the first web member; 3, the second web member; 4, connecting link; 5, protection tube; 6, spring; 7, stress grating; 8, temperature compensation grating; 9, transmission lever; 10, thread adapter; 11, set bolt; 12, ball universal joint; 13, hold-open catch; 14, ball screw; 15, register pin; 16, lock nut; 17, connecting screw rod; 18, welder; 19, crack; 20, mechanical screws expansion anchor head; 21, be in the milk anchor head.
Embodiment
For the ease of understanding the utility model, hereafter will do to describe more comprehensively, meticulously to the utility model in conjunction with Figure of description and preferred embodiment, but protection domain of the present utility model is not limited to following specific embodiment.
It should be noted that, when a certain element is described on " be fixed on, be fixed in, be connected to or be communicated in " another element, it can be directly fixing, affixed, connect or be communicated with on another element, also can be by other intermediate connectors indirectly fixing, affixed, connection or connection on another element.
Unless otherwise defined, hereinafter used all technical terms are identical with the implication that those skilled in the art understand usually.The object of technical term used herein just in order to describe specific embodiment is not be intended to limit protection domain of the present utility model.
Embodiment 1
A kind of Fiber Bragg Grating Displacement Sensor device as shown in FIG. 1 to 3; comprise fiber-optic grating sensor 1 and be positioned at first web member 2 and second web member 3 at fiber-optic grating sensor 1 two ends; fiber-optic grating sensor 1 comprises connecting link 4, protection tube 5 and is positioned at spring 6 and the fiber grating sensing element of protection tube 5; fiber grating sensing element comprises stress grating 7 and the temperature compensation grating 8 of series connection mutually, and the two ends of spring 6 are connected with connecting link 4 with stress grating 7 respectively.Temperature compensation grating 8 is fixedly connected in protection tube 5, protection tube 5 be socketed in one end of connecting link 4 and connecting link 4 in protection tube 5 along the axially-movable of protection tube 5.Connecting link 4 moves along with the change in crack 9 and passes to stress grating 7 with the form of pulling force, and the crest of stress grating 7 moves thus judges the situation of change in crack.
In the present embodiment, the first web member 2 comprises and is connected to transmission lever 9 on connecting link 4 and fixture; Fixture is flexibly connected by set bolt 11 with transmission lever 9; Second web member 3 comprises the ball universal joint 12 be fixedly connected with protection tube 5 and the ball screw 14 be connected with the end of ball universal joint 12 by hold-open catch 13.In the present embodiment, one end of transmission lever 9 is fixedly connected with connecting link 4, and the other end is provided with the register pin 15 of a set bolt 11.In the present embodiment, fixture comprises straight type thread adapter 10, lock nut 16, ball universal joint 12 and ball screw 14, and thread adapter 10 can be curved or other shapes in a practical situation; One end of thread adapter 10 is connected and fixed bolt 11, and the other end connects ball universal joint 12 by connecting screw rod 17 and is fastenedly connected screw rod 17 with lock nut 16; The end of ball universal joint 12 fixes ball screw 14 by hold-open catch 13.
In the present embodiment, ball screw 14 is connected with the steel of both sides, crack 19 by welder 18, and wherein crack 19 is positioned at the centre of two welders 18.
The Fiber Bragg Grating Displacement Sensor device installation steps of the present embodiment are as follows: 1) according to the folding degree will measuring crack 19, Fiber Bragg Grating Displacement Sensor device is put into centre position, the increase so just can surveying crack 19 also can survey reducing of crack 19; And by the polishing of welder 18 surrounding steel surface, frosted.
2) on the steel surface handled well, fix welder 18, check gap, and welder 18 is welded on steel.
3) by the screw of the ball screw 14 at sensing device two ends difference precession welder 18, remove the hold-open catch 13 of ball universal joint 12 end and tighten ball screw 14 with screwdriver, again loading onto hold-open catch 13 and fix bulb jam nut.
4) with optical fiber grating analysis instrument reading, whether suitablely installation site is detected.
Embodiment 2
A kind of Fiber Bragg Grating Displacement Sensor device as shown in Figure 1, Figure 2 and Figure 4, ball screw 14 is connected by the concrete of grouting anchor head 21 and both sides, crack or rock, and wherein crack 19 is positioned at the centre of two anchor heads 21 that are in the milk.
The Fiber Bragg Grating Displacement Sensor device installation steps of the present embodiment are as follows: 1) according to the folding degree will measuring crack 19, Fiber Bragg Grating Displacement Sensor device is put into centre position, the increase so just can surveying crack 19 also can survey reducing of crack 19.Bore two dark about 75mm with electric hammer in the position determined, bore is the boring of 12.5mm, if grouting anchor head 21 prescinded boring also can be corresponding more shallow.
2) with fixing rockbolt installation sensing device, fill in boring with grouting or epoxy resin and grouting anchor head 21 advanced until flush with surface, then using accelerated cement or epoxy resin grouting.
3) cement or epoxy resin solidify rear fixing sensing device, take down the hold-open catch 13 of ball universal joint 12 end and tighten bulb with screwdriver, again load onto hold-open catch 13 and fix bulb jam nut.
4) with optical fiber grating analysis instrument reading, whether suitablely installation site is detected.
Other structures of the present embodiment are identical with embodiment 1.
Embodiment 3
As shown in Figure 1, Figure 2 with a kind of Fiber Bragg Grating Displacement Sensor device shown in Fig. 5, ball screw 14 is connected by the concrete of mechanical screws expansion anchor head 20 and both sides, crack or rock, and wherein crack 19 is positioned at the centre of two grouting anchor heads 21.
The Fiber Bragg Grating Displacement Sensor device installation steps of the present embodiment are as follows: 1) according to the folding degree will measuring crack 19, Fiber Bragg Grating Displacement Sensor device is put into centre position, the increase so just can surveying crack 19 also can survey reducing of crack 19.Bore two dark about 30mm with electric hammer in the position determined, bore is the hole of 12.5mm.
2) anchor head 20 that mechanical screws expanded injects boring.
3) by the screw of the ball screw at sensing device two ends difference precession mechanical screws expansion anchor head 20, take down the hold-open catch 13 of ball universal joint 12 end and tighten bulb fixed screw with screwdriver, again loading onto hold-open catch 13 and fix bulb jam nut.
4) with optical fiber grating analysis instrument reading, whether suitablely installation site is detected.
Other structures of the present embodiment are identical with embodiment 1.
Claims (8)
1. a Fiber Bragg Grating Displacement Sensor device, comprise fiber-optic grating sensor (1) and be positioned at the first web member (2) and second web member (3) at fiber-optic grating sensor (1) two ends, it is characterized in that: described fiber-optic grating sensor (1) comprises connecting link (4), protection tube (5) and be positioned at spring (6) and the fiber grating sensing element of protection tube (5), described fiber grating sensing element comprises stress grating (7) and the temperature compensation grating (8) of series connection mutually, the two ends of described spring (6) are connected with connecting link (4) with stress grating (7) respectively.
2. Fiber Bragg Grating Displacement Sensor device according to claim 1; it is characterized in that: described temperature compensation grating (8) is fixedly connected in protection tube (5), described protection tube (5) be socketed in one end of connecting link (4) and connecting link (4) in protection tube (5) along the axially-movable of protection tube (5).
3. Fiber Bragg Grating Displacement Sensor device according to claim 1 and 2, is characterized in that: described first web member (2) comprises and is connected to transmission lever (9) on connecting link (4) and fixture; Described fixture is flexibly connected by set bolt (11) with transmission lever (9); Described second web member (3) comprises the ball universal joint (12) be fixedly connected with described protection tube (5) and the ball screw (14) be connected with the end of described ball universal joint (12) by hold-open catch (13).
4. Fiber Bragg Grating Displacement Sensor device according to claim 3, it is characterized in that: one end of described transmission lever (9) is fixedly connected with connecting link (4), the other end is provided with the register pin (15) of a set bolt (11).
5. Fiber Bragg Grating Displacement Sensor device according to claim 3, is characterized in that: described fixture comprises thread adapter (10), lock nut (16), ball universal joint (12) and ball screw (14); One end of described thread adapter (10) is connected and fixed bolt (11), and the other end connects ball universal joint (12) by connecting screw rod (17) and is fastenedly connected screw rod (17) with lock nut (16); The end of described ball universal joint (12) is by the fixing ball screw (14) of hold-open catch (13).
6. Fiber Bragg Grating Displacement Sensor device according to claim 5, is characterized in that: described ball screw (14) is connected by the weld part of welder (18) with crack (19) both sides.
7. Fiber Bragg Grating Displacement Sensor device according to claim 5, is characterized in that: described ball screw (14) is connected by the expand concrete of anchor head (20) and both sides, crack or rock of mechanical screws.
8. Fiber Bragg Grating Displacement Sensor device according to claim 5, is characterized in that: described ball screw (14) is connected with the concrete of both sides, crack or rock by grouting anchor head (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201520151362.0U CN204630548U (en) | 2015-03-17 | 2015-03-17 | A kind of Fiber Bragg Grating Displacement Sensor device |
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| CN201520151362.0U CN204630548U (en) | 2015-03-17 | 2015-03-17 | A kind of Fiber Bragg Grating Displacement Sensor device |
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| CN204630548U true CN204630548U (en) | 2015-09-09 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105403337A (en) * | 2015-11-02 | 2016-03-16 | 武汉理工大学 | Fiber grating bolt stress sensor with pre-stretching device |
| CN106989687A (en) * | 2017-04-27 | 2017-07-28 | 安徽理工大学 | Country rock method of testing and test system |
| CN107238454A (en) * | 2017-07-24 | 2017-10-10 | 浙江众泰汽车制造有限公司 | A kind of trailing arm strain detection testing device |
| CN109425299A (en) * | 2017-09-02 | 2019-03-05 | 湖南北斗星空自动化科技有限公司 | A method of track plank split is monitored automatically using raster pattern displacement range measurement principle |
| CN111268169A (en) * | 2020-02-28 | 2020-06-12 | 中国商用飞机有限责任公司 | Measuring device and measuring method for measuring deformation of tie rod on airplane |
| CN113104529A (en) * | 2021-03-29 | 2021-07-13 | 中煤科工开采研究院有限公司 | Optical fiber sensor device and scraper conveyor |
-
2015
- 2015-03-17 CN CN201520151362.0U patent/CN204630548U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105403337A (en) * | 2015-11-02 | 2016-03-16 | 武汉理工大学 | Fiber grating bolt stress sensor with pre-stretching device |
| CN105403337B (en) * | 2015-11-02 | 2018-11-06 | 武汉理工大学 | A kind of fiber grating bolt stress sensor with pre-stretching device |
| CN106989687A (en) * | 2017-04-27 | 2017-07-28 | 安徽理工大学 | Country rock method of testing and test system |
| CN107238454A (en) * | 2017-07-24 | 2017-10-10 | 浙江众泰汽车制造有限公司 | A kind of trailing arm strain detection testing device |
| CN109425299A (en) * | 2017-09-02 | 2019-03-05 | 湖南北斗星空自动化科技有限公司 | A method of track plank split is monitored automatically using raster pattern displacement range measurement principle |
| CN111268169A (en) * | 2020-02-28 | 2020-06-12 | 中国商用飞机有限责任公司 | Measuring device and measuring method for measuring deformation of tie rod on airplane |
| CN113104529A (en) * | 2021-03-29 | 2021-07-13 | 中煤科工开采研究院有限公司 | Optical fiber sensor device and scraper conveyor |
| CN113104529B (en) * | 2021-03-29 | 2022-12-20 | 中煤科工开采研究院有限公司 | Optical fiber sensor device and scraper conveyor |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210120 Address after: Room 1101, building 4, Lugu Mingzhu home, 398 Fenglin Third Road, Changsha high tech Development Zone, Changsha City, Hunan Province, 410000 Patentee after: Changsha Meineng new energy Co.,Ltd. Address before: No. 701, superstar venture base, No. 8 Lujing Road, Changsha hi tech Development Zone, Hunan 410000 Patentee before: CHANGSHA MEINENG ELECTRIC EQUIPMENT Co.,Ltd. |
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| 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: 20150909 |