CN202182703U - Soil mass packaging fiber grating soil mass strain transducer - Google Patents
Soil mass packaging fiber grating soil mass strain transducer Download PDFInfo
- Publication number
- CN202182703U CN202182703U CN2011203049793U CN201120304979U CN202182703U CN 202182703 U CN202182703 U CN 202182703U CN 2011203049793 U CN2011203049793 U CN 2011203049793U CN 201120304979 U CN201120304979 U CN 201120304979U CN 202182703 U CN202182703 U CN 202182703U
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- fiber grating
- soil mass
- soil body
- spring
- pure
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Abstract
A soil mass packaging fiber grating soil mass strain transducer comprises a spring fiber grating, a pure fiber grating, a cylindrical compaction soil mass packaging structure, two communicating pipes, a temperature-sensing groove, a temperature sensor, armor optical cables and a rigid packaging plate. The two communicating pipes are symmetrically distributed along the axis of the prefabricated cylindrical compaction soil mass packaging structure, the spring fiber grating in a tensioning state is arranged in one of the communicating pipes, and the pure fiber grating in a tensioning state is arranged in the other communicating pipe. The communicating pipes are made of discontinuous rigid packaging pipes, and the discontinuous portions are connected through high durable hoses. Two ends of the spring fiber grating and two ends of the pure fiber grating are respectively fixedly connected with two ends of the communicating pipes where the spring fiber grating and the pure fiber grating are located. The temperature sensor is arranged in the temperature-sensing groove, and the spring fiber grating, the pure fiber grating and the temperature sensor are connected and led out through the armor optical cables. The soil mass packaging fiber grating soil mass strain transducer is simple in process, convenient in layout, high in accuracy, large in measuring range, capable of achieving monitoring to soil mass compressive strain and suitable for industrialization.
Description
Technical field
The utility model is a kind of soil body strain that is used for; The soil body packaged fiber grating strain transducer method for packing and the sensor of compression deformation monitoring; Be exactly the strain sensing technology of utilizing fiber grating specifically; Through the fixing mean strain of accurately measuring the small strain scope soil body in the sensing gauge length in two ends, with the fixed fiber grating of Microspring lower slightly precision monitoring is implemented in the mean strain of the big range of strain soil body in the sensing gauge length through pretensioned through two ends are fixing again: utilize pure fiber grating and realize the soil structures gamut with the fixed fiber grating of Microspring and have the strain measurement of multistage monitoring accuracy through pretensioned fiber grating.This sensor uses soil body material that fiber grating is encapsulated, and realizes the protection to fiber grating.
Background technology
Since the people such as Morey of the U.S. in 1989 carry out the strain and temperature sensor research of fiber grating first; Countries in the world are all extremely paid close attention to it and have been carried out applied research widely, and fiber grating has become sensory field technology with fastest developing speed in more than the 10 year short time.Fiber grating with its have anti-electromagnetic interference (EMI), good endurance, quasi-distributed sensing, absolute measurement, size is little, highly sensitive, precision is high, bandwidth, signal to noise ratio (S/N ratio) advantages of higher; And be widely used in fields such as civil engineering work, aerospace industry, shipping industry, power industry, petrochemical complex, nuclear industry, medical science; And become one of optimal smart sensor of structure partial health monitoring, in monitoring structural health conditions, be widely used in recent years.
The imbedded fiber grating sensor is a kind of new strain sensor based on Fiber Bragg Grating technology, is widely used in the engineering monitoring field, but the sensor of soil body compression deformation test is but seldom related to.The sensor of having reported at present that is used for soil monitoring; All adopt material to carry out the elasticity encapsulation of sensor with high elastic modulus; The elastic modulus of these sensor package structured materials and elastic modulus of soil body to be measured do not match; The encapsulating structure and the soil body to be measured can not cooperative transformations, thereby cause monitoring accuracy inaccurate.
The utility model content
The utility model provide a kind of can the strain of the precise monitoring soil body, the fiber-optic grating sensor method for packing and the sensor thereof of compression deformation.This sensor adopts the soil body material monitored to encapsulate, and utilizes identical materials, has overcome the influence of different materials different moduli of elasticity to monitoring result, so this sensor has good precision, can satisfy requirement of engineering.In order to realize the soil structures gamut is had the strain measurement of multistage monitoring accuracy; The utility model is accurately measured the enforcement of the mean strain of the small strain scope soil body in the sensing gauge length through pretensioned fiber grating through two ends are fixing, through the fixing fiber grating through pretensioned band spring in two ends lower slightly precision monitoring is implemented in the mean strain of the big range of strain soil body in the sensing gauge length; Can realize the soil structures gamut and have the strain measurement of multistage monitoring accuracy through an above-mentioned preparatory stretch-draw optical fiber and preparatory tension spring optical fiber.
The technical scheme of the utility model is following:
The fiber grating soil body strain transducer method for packing and the sensor thereof of this kind soil body encapsulation comprise: spring fiber grating, pure fiber grating, cylindrical compacting soil body encapsulating structure, two communicating pipes, a temperature-sensitive groove, temperature sensor, armouring optical cable and a rigidity encapsulation sheet material.Two communicating pipes was symmetrically distributed along prefabricated cylindrical compacting soil body encapsulating structure axis, and a spring fiber grating that is in tensile state places a communicating pipe, and a pure fiber grating that is in tensile state places another root communicating pipe; Adopt discontinuous rigidity encapsulation tubing communicating pipe, discontinuous part adopts the high-durability flexible pipe to connect; The two ends of spring fiber grating, the two ends of pure fiber grating respectively with residing communicating pipe separately two ends fixed: temperature sensor places the temperature-sensitive groove, and spring fiber grating, pure fiber grating and temperature sensor connect with the armouring optical cable draws.
In order to realize the temperature compensation to sensor measurement, the utility model is through the monitoring of one one end fiber grating realization freely to temperature.In order to eliminate the encapsulating material bullet mould phenomenon that do not match, sensor package inside configuration hole adopts discontinuous encapsulation tubing to protect, and discontinuous part adopts the high-durability flexible pipe to connect protection.For strengthening combining of sensor and the monitored soil body, rigidity is set in the sensor both sides encapsulates sheet material; Rigidity sheet material firmly is connected with the interior encapsulation of encapsulating structure tubing, guarantees that monitoring result is accurate.
The beneficial effect of the utility model is that technology is simple, is suitable for industrialization production, and is with low cost; Can use a signal processing and analysis device and realize monitoring a plurality of sensors; The encapsulating material that sensor adopted is a soil body material, and measuring accuracy is high.
Description of drawings
Fig. 1 is cylindrical compacting soil body encapsulating structure synoptic diagram.
Fig. 2 is the fiber grating soil body strain transducer of soil body encapsulation.
Fig. 3 is the A-A sectional view of the packaged fiber grating soil body strain transducer of the utility model.
Fig. 4 is the B-B sectional view of the packaged fiber grating soil body strain transducer of the utility model.
Among the figure: 1 pure fiber grating; 2 spring fiber gratings; 3 temperature sensors; 4 communicating pipes; 5 temperature-sensitive grooves; 6 armouring optical cables; The soil body encapsulating structure of 7 compactings; 8 rigidity encapsulation sheet material.
Embodiment
Be described in detail the specific embodiment of the utility model below in conjunction with technical scheme and accompanying drawing.
Fiber grating soil body strain transducer structure; Structure such as Fig. 1, Fig. 2, Fig. 3 and shown in Figure 4, this sensor comprise a pure fiber grating 1, spring fiber grating 2, temperature sensor 3, two communicating pipes 4, temperature-sensitive groove 5, armouring optical cable 6, prefabricated compacting soil body encapsulating structure 7, rigidity encapsulation sheet material 8.At first make soil body encapsulating structure; In prefabricated cylindrical die, placed in advance for two communicating pipes; When guarantee importing soil body material communicating pipe state linearly still; In communicating pipe, insert rigid rod (rigid rod is extracted out) after soil body encapsulating structure completes, in mould, import soil body material and reserve temperature-sensitive groove (the temperature-sensitive groove can use the rigidity straight-bar to reserve, and after soil body encapsulating structure completes rigid rod is taken out out) after fixing communicating pipe from communicating pipe; Import behind the soil body material its tamping; And form removal: make the optical fiber grating soil pressure sensing device then, at first a pure fiber grating and a spring fiber grating inserted in the communicating pipe separately, afterwards with glue with pure fiber grating, spring fiber grating one end and residing soil body encapsulating structure is fixed separately; The back applies prestress to pure fiber grating, spring fiber grating then; The other end of fixed purer fiber grating, spring fiber grating places the temperature-sensitive groove with temperature sensor then, connects pure fiber grating, spring fiber grating and the temperature sensor of drawing with the armouring optical cable at last.
Claims (1)
1. the fiber grating soil body strain transducer of soil body encapsulation; It is characterized in that; This sensor comprises: spring fiber grating, pure fiber grating, cylindrical compacting soil body encapsulating structure, two communicating pipes, a temperature-sensitive groove; Temperature sensor, armouring optical cable and a rigidity encapsulation sheet material; Two communicating pipes was symmetrically distributed along prefabricated cylindrical compacting soil body encapsulating structure axis, and a spring fiber grating that is in tensile state places a communicating pipe, and a pure fiber grating that is in tensile state places another root communicating pipe; Adopt discontinuous rigidity encapsulation tubing communicating pipe, discontinuous part adopts flexible pipe to connect; The two ends of spring fiber grating, the two ends of pure fiber grating respectively with residing communicating pipe separately two ends fixed: temperature sensor places the temperature-sensitive groove, and spring fiber grating, pure fiber grating and temperature sensor connect with the armouring optical cable draws.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203049793U CN202182703U (en) | 2011-08-20 | 2011-08-20 | Soil mass packaging fiber grating soil mass strain transducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203049793U CN202182703U (en) | 2011-08-20 | 2011-08-20 | Soil mass packaging fiber grating soil mass strain transducer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202182703U true CN202182703U (en) | 2012-04-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203049793U Withdrawn - After Issue CN202182703U (en) | 2011-08-20 | 2011-08-20 | Soil mass packaging fiber grating soil mass strain transducer |
Country Status (1)
| Country | Link |
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| CN (1) | CN202182703U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102425994A (en) * | 2011-08-20 | 2012-04-25 | 大连理工大学 | Fiber bragg grating soil mass strain sensor for soil mass encapsulation |
| CN103383286A (en) * | 2012-05-04 | 2013-11-06 | 中国石油天然气股份有限公司 | Permafrost region oil-gas pipeline ambient temperature monitoring system |
| CN111189405A (en) * | 2020-01-13 | 2020-05-22 | 哈尔滨工业大学 | Fiber grating string three-dimensional space strain sensor for road |
| CN116678529A (en) * | 2023-06-07 | 2023-09-01 | 苏州智云程科技有限公司 | Soil pressure sensor and burying and recycling method thereof |
-
2011
- 2011-08-20 CN CN2011203049793U patent/CN202182703U/en not_active Withdrawn - After Issue
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102425994A (en) * | 2011-08-20 | 2012-04-25 | 大连理工大学 | Fiber bragg grating soil mass strain sensor for soil mass encapsulation |
| CN102425994B (en) * | 2011-08-20 | 2013-08-07 | 大连理工大学 | Fiber bragg grating soil mass strain sensor for soil mass encapsulation |
| CN103383286A (en) * | 2012-05-04 | 2013-11-06 | 中国石油天然气股份有限公司 | Permafrost region oil-gas pipeline ambient temperature monitoring system |
| CN111189405A (en) * | 2020-01-13 | 2020-05-22 | 哈尔滨工业大学 | Fiber grating string three-dimensional space strain sensor for road |
| CN116678529A (en) * | 2023-06-07 | 2023-09-01 | 苏州智云程科技有限公司 | Soil pressure sensor and burying and recycling method thereof |
| CN116678529B (en) * | 2023-06-07 | 2023-12-22 | 苏州智云程科技有限公司 | Soil pressure sensor and burying and recycling method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20120404 Effective date of abandoning: 20130807 |
|
| RGAV | Abandon patent right to avoid regrant |