CN202614435U - Compound optical fiber strain/temperature sensing device - Google Patents
Compound optical fiber strain/temperature sensing device Download PDFInfo
- Publication number
- CN202614435U CN202614435U CN201220207006.2U CN201220207006U CN202614435U CN 202614435 U CN202614435 U CN 202614435U CN 201220207006 U CN201220207006 U CN 201220207006U CN 202614435 U CN202614435 U CN 202614435U
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- fiber grating
- fiber
- bearing body
- sensing device
- grating
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Abstract
The utility model discloses a compound optical fiber strain/temperature sensing device, comprising a bearing body, wherein a protective housing is arranged outside the bearing body; a first optical fiber grating for measuring strain is mounted on the outer surface of a part of the bearing body located in the protective housing; the two ends of the grating part of the first optical fiber grating are pre-tensioned and fixed and parallel to the axis direction of the bearing body; a second optical fiber grating for temperature compensation is mounted in the protective housing; one end of the second optical fiber grating is fixed while the other end thereof is free; and an optical fiber outlet suitable for the optical fiber grating to pass therethrough is formed on the protective housing. The device is low in zero drift and temperature drift, high in accuracy and good in capacity of resisting disturbance.
Description
Technical field
The utility model relates to a kind of sensor, relates in particular to a kind of fiber stress temperature composite sensing device.
Background technology
At present, conventional electric transducer only can carry out stress measurement, can not realize the dual measurement of stress and temperature.And in use; There are shortcomings such as zero point drift is big, temperature drift is big, precision is low, poor anti jamming capability; Its output parameter tends in time to change with external environment and to produce fluctuation, has a strong impact on the acquisition precision and the resolution of data, when serious even can provide rub-out signal; Cause parameter detecting unusual, system can't operate as normal.
The utility model content
The purpose of the utility model is to provide a kind of zero point drift and temperature drift is little, degree of accuracy is high and antijamming capability is strong fiber stress temperature composite sensing device.
For achieving the above object; The utility model provides a kind of fiber stress temperature composite sensing device; It comprises the pressure-bearing body, and the external protection housing that is provided with of said pressure-bearing, said pressure-bearing body are positioned on the outside surface of said protection housing first fiber grating that is used to survey stress is installed; The preparatory tensioning in two ends of the grating part of said first fiber grating is fixed and is parallel with the axis direction of said pressure-bearing body; Second fiber grating that is used for temperature compensation is installed in the said protection housing, and an end of the said second fiber grating fixedly other end is free, and said protection housing is provided with and is suitable for the optical fiber outlet that fiber grating passes.
In the fiber stress temperature composite sensing device of the utility model; In fact the original dependent variable that first fiber grating records includes the cross influence of stress and temperature; Second fiber grating then is specifically designed to the dependent variable that measurement produces because of temperature environment in the protection housing; Because second fiber grating and first fiber grating all are in same temperature environment, like this, the original dependent variable of first fiber grating deducts the stressed dependent variable that original dependent variable that second fiber grating records just can draw this first fiber grating; Thereby; Compare with the electric transducer of routine, its temperature drift is less, precision is higher, in addition; The fiber stress temperature composite sensing device of the utility model replaces conventional electric transducer with passive grating and removes to survey stress, thereby has overcome the defective that there is the big and poor anti jamming capability of zero drift in conventional electric transducer.
Description of drawings
Fig. 1 is the perspective view of the fiber stress temperature composite sensing device of the utility model;
Fig. 2 is vertical semisectional view of the fiber stress temperature composite sensing device of the utility model;
Fig. 3 is the perspective view of the pressure-bearing body in the fiber stress temperature composite sensing device of the utility model.
Embodiment
Be described in detail below in conjunction with the embodiment of accompanying drawing the utility model:
Referring to figs. 1 to shown in Figure 2; The fiber stress temperature composite sensing device of present embodiment comprises pressure-bearing body 1, the pressure-bearing body 1 outer containment vessel body 2 that is with, and this protection housing 2 is the housing of bottom-open; Which is provided with and be suitable for the optical fiber outlet 6 that fiber grating passes; Its bottom is equipped with the base plate 3 of cooperation, and pressure-bearing body 1, protection housing 2 and base plate 3 connect fixing through screw, and pressure-bearing body 1 is equipped with first fiber grating 4 that even number (for example 2,4,8 etc.) is used to survey stress on the outside surface of the part that is positioned at containment vessel body 2; These first fiber gratings 4 circumferentially distribute with respect to pressure-bearing body 1 symmetrically and evenly; The preparatory tensioning in two ends of its grating part separately is adhesively fixed and is parallel with the axis direction of pressure-bearing body 1, and the bonding end that second fiber grating, 5, the second fiber gratings 5 that are used for temperature compensation are installed is fixed on other end freedom on the inwall of protecting housing 2 on protection housing 2 inwalls; After connecting successively, even number first fiber grating 4 connects with second fiber grating 5; Thereby constituted a fiber grating with many gratings, had only an end connector to stretch out from optical fiber outlet 6 like this, structure is more simple.
In conjunction with shown in Figure 3; For guaranteeing secure fixation; First fiber grating, 4 fixed forms are preferably: be positioned at pressure-bearing body 1 and have several on the outside surface of part of protection housing 2 with respect to the circumferential bar-shaped trough 7 of distribution symmetrically and evenly of pressure-bearing body 1; The bearing of trend of bar-shaped trough 7 is parallel with the axis direction of pressure-bearing body 1, and the grating part of each first fiber grating 4 then is laid in the bar-shaped trough 7.
In the fiber stress temperature composite sensing device of present embodiment; In fact the original dependent variable that each first fiber grating 4 records includes the cross influence of stress and temperature; Second fiber grating 5 then is specifically designed to the dependent variable that measurement produces because of temperature environment in the protection housing 2; Because second fiber grating 5 all is in same temperature environment with each first fiber grating 4, like this, the original dependent variable of each first fiber grating 4 deducts the stressed dependent variable that original dependent variable that second fiber grating 5 records just can draw this first fiber grating 4; And in the foregoing description; Through getting the arithmetic mean of these first fiber grating, 4 stressed dependent variables that distribute symmetrically and evenly, can well overcome the measuring error that the eccentricity effect of stress causes, thereby further improve measuring accuracy.
Above embodiment describes the preferred implementation of the utility model; Be not that scope to the utility model limits; Under the prerequisite that does not break away from the utility model design spirit; Various distortion and improvement that the common engineering technical personnel in this area make the technical scheme of the utility model all should fall in the protection domain that claims of the utility model confirm.
Claims (6)
1. fiber stress temperature composite sensing device; It is characterized in that; Comprise pressure-bearing body (1); The outer containment vessel body (2) that is provided with of said pressure-bearing body (1); Said pressure-bearing body (1) is equipped with first fiber grating (4) that is used to survey stress on the outside surface of the part that is positioned at said protection housing (2), the preparatory tensioning in two ends of the grating part of said first fiber grating (4) is fixed and be parallel with the axis direction of said pressure-bearing body (1), and second fiber grating (5) that is used for temperature compensation is installed in the said protection housing (2); One end of said second fiber grating (5) the fixedly other end is free, and said protection housing (2) is provided with and is suitable for the optical fiber outlet (6) that fiber grating passes.
2. fiber stress temperature composite sensing device according to claim 1 is characterized in that said first fiber grating (4) has even number, and circumferentially distributes symmetrically and evenly with respect to said pressure-bearing body (1).
3. fiber stress temperature composite sensing device according to claim 2 is characterized in that, connects with said second fiber grating (5) after said even number first fiber grating (4) is connected successively, constitutes the fiber grating with many gratings.
4. fiber stress temperature composite sensing device according to claim 3; It is characterized in that; Said pressure-bearing body (1) is positioned on the outside surface of part of said protection housing (2) and has several bar-shaped troughs (7), and the grating of each said first fiber grating (4) partly is laid in the said bar-shaped trough (7).
5. fiber stress temperature composite sensing device according to claim 4 is characterized in that said protection housing (2) is the housing of bottom-open, and its bottom is equipped with the base plate (3) of cooperation.
6. fiber stress temperature composite sensing device according to claim 5 is characterized in that the stiff end of said second fiber grating (5) is fixed on the inwall of said protection housing (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220207006.2U CN202614435U (en) | 2012-05-09 | 2012-05-09 | Compound optical fiber strain/temperature sensing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220207006.2U CN202614435U (en) | 2012-05-09 | 2012-05-09 | Compound optical fiber strain/temperature sensing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202614435U true CN202614435U (en) | 2012-12-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201220207006.2U Expired - Fee Related CN202614435U (en) | 2012-05-09 | 2012-05-09 | Compound optical fiber strain/temperature sensing device |
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| CN (1) | CN202614435U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103674358A (en) * | 2013-11-25 | 2014-03-26 | 中国航空工业集团公司北京长城计量测试技术研究所 | Method for compensating temperature of diaphragm type fiber F-P (Fabry-Perot) cavity pressure sensor |
| CN104034471A (en) * | 2014-06-25 | 2014-09-10 | 西南交通大学 | Separately measuring method for basic temperature stress and expansion additional force of continuous welded rails |
| CN114235238A (en) * | 2021-12-17 | 2022-03-25 | 桂林理工大学 | Semi-combined pressure ring sensor and design method thereof |
| CN116519500A (en) * | 2023-04-19 | 2023-08-01 | 山东科技大学 | Method for acquiring dynamic temperature cloud picture of Hopkinson pressure bar sample |
-
2012
- 2012-05-09 CN CN201220207006.2U patent/CN202614435U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103674358A (en) * | 2013-11-25 | 2014-03-26 | 中国航空工业集团公司北京长城计量测试技术研究所 | Method for compensating temperature of diaphragm type fiber F-P (Fabry-Perot) cavity pressure sensor |
| CN103674358B (en) * | 2013-11-25 | 2015-06-17 | 中国航空工业集团公司北京长城计量测试技术研究所 | Method for compensating temperature of diaphragm type fiber F-P (Fabry-Perot) cavity pressure sensor |
| CN104034471A (en) * | 2014-06-25 | 2014-09-10 | 西南交通大学 | Separately measuring method for basic temperature stress and expansion additional force of continuous welded rails |
| CN114235238A (en) * | 2021-12-17 | 2022-03-25 | 桂林理工大学 | Semi-combined pressure ring sensor and design method thereof |
| CN114235238B (en) * | 2021-12-17 | 2024-03-26 | 桂林理工大学 | Semi-combined pressure ring sensor and design method thereof |
| CN116519500A (en) * | 2023-04-19 | 2023-08-01 | 山东科技大学 | Method for acquiring dynamic temperature cloud picture of Hopkinson pressure bar sample |
| CN116519500B (en) * | 2023-04-19 | 2024-03-12 | 山东科技大学 | Method for acquiring dynamic temperature cloud picture of Hopkinson pressure bar sample |
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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: 20121219 Termination date: 20160509 |