CN219532040U - High-precision fiber bragg grating inclination sensor - Google Patents
High-precision fiber bragg grating inclination sensor Download PDFInfo
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- CN219532040U CN219532040U CN202320410194.7U CN202320410194U CN219532040U CN 219532040 U CN219532040 U CN 219532040U CN 202320410194 U CN202320410194 U CN 202320410194U CN 219532040 U CN219532040 U CN 219532040U
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Abstract
The utility model relates to the technical field of inclination sensors, and discloses a high-precision fiber grating inclination sensor, which comprises a shell, a cover and a fiber grating; the cover is connected to the shell in a matching way; the shell is provided with a mounting groove; the inner core body is connected in the mounting groove; the inner core body comprises an optical fiber fixing block, a connecting sheet and a mass core body; the front end of the optical fiber fixing block is connected to the front side surface of the mounting groove; the mass core body is connected with the optical fiber fixing block through the connecting sheet and is suspended in the mounting groove; one end of one fiber grating passes through the left side of the shell and is connected to the left side of the fiber fixing block and extends to the mass core; one end of the other fiber grating passes through the right side of the shell, is connected to the right side of the fiber fixing block and extends to the mass core. The high-precision fiber bragg grating inclination sensor provided by the utility model improves the accuracy of measuring the inclination change of structures such as buildings and the like, and has small error.
Description
Technical Field
The utility model relates to the technical field of inclination angle sensors, in particular to a high-precision fiber bragg grating inclination angle sensor.
Background
Tilt sensors are used in a variety of angle measuring applications. For example, high precision laser instrument level, engineering machinery leveling, remote ranging instrument, high altitude platform safety protection, pitch angle measurement of directional satellite communication antenna, ship navigation attitude measurement, shield jacking pipe application, dam detection, geological equipment inclination monitoring, gun barrel initial angle measurement, radar vehicle platform detection, satellite communication vehicle attitude detection, and the like.
The Chinese patent with the patent number of CN212340236U discloses a gravity type fiber grating inclination sensor which consists of a protective shell, a pagoda joint, a plug, a copper ball and a steel tube; the upper part of the protective shell is connected with a pagoda joint, and the bottom of the protective shell is provided with a plug; the copper ball is accommodated in the protective shell; the steel tube is packaged with the grating and then connected with the copper ball, so that the grating bears the total weight of the copper ball. When the fiber bragg grating inclination sensor inclines, the gravity component of the copper ball changes, the tension of the fiber bragg grating on the copper ball changes, and then the inclination angle change of the building is measured. However, when the fiber grating tilt sensor tilts, the accuracy of measuring the tilt change of the building is low and the error is large.
Disclosure of Invention
The utility model aims to overcome the problems in the prior art and provides a high-precision fiber bragg grating inclination sensor with high measuring angle precision and small error.
In order to achieve the above purpose, the present utility model adopts the following scheme:
a high-precision fiber bragg grating inclination sensor comprises a shell, a cover and a fiber bragg grating; the cover is connected to the shell in a matching way; the housing has a mounting slot; an inner core body is connected in the mounting groove; the inner core body comprises an optical fiber fixing block, a connecting sheet and a mass core body;
the front end of the optical fiber fixing block is connected to the front side surface of the mounting groove;
the mass core body is connected with the optical fiber fixing block through the connecting sheet and is suspended in the mounting groove;
one end of a fiber grating passes through the left side of the shell, is connected to the left side of the fiber fixing block and extends to the mass core;
one end of the other fiber grating passes through the right side of the shell, is connected to the right side of the fiber fixing block and extends to the mass core.
Further, the mass core comprises a connecting column and a mass block;
the rear end of the optical fiber fixing block is provided with an embedded groove for one end of the connecting column to penetrate;
one end of the connecting column penetrates into the embedded groove and is connected with the groove front side surface of the embedded groove through the connecting sheet; the other end of the connecting column is connected with the mass block;
one end of a fiber grating passes through the left side of the shell and is connected to the left side of the fiber fixing block, and extends to one end of the connecting column;
one end of the other fiber grating passes through the right side of the shell, is connected to the right side of the fiber fixing block, and extends to one end of the connecting column.
Further, a left side optical locating groove is formed in the top end face of the optical fiber fixing block from the left side of the optical fiber fixing block to the left side of the embedded groove;
a right-side optical fiber positioning groove is formed in the top end face of the optical fiber fixing block from the right side of the optical fiber fixing block to the right side of the embedded groove;
a measuring positioning groove is formed in the top end face of one end of the connecting column;
one end of the fiber bragg grating penetrates through the left side of the shell, is embedded and connected in the left fiber bragg grating positioning groove, and extends and is embedded in the measurement positioning groove;
one end of the other fiber bragg grating is embedded and connected in the right-side optical positioning groove and is embedded in the measuring positioning groove in an extending mode.
Further, one end of one fiber grating is connected and fixed with the left fiber positioning groove, and one end of the other fiber grating is connected and fixed with the right fiber positioning groove through silicone rubber.
Further, the optical fiber fixing block, the connecting sheet and the mass core body are integrally formed.
Further, the optical fiber fixing block is connected to one groove side surface of the mounting groove by a screw.
Further, the number of the screws is 2.
Further, mounting parts are arranged on two sides of the shell; the mounting part is provided with a strip-shaped hole.
Further, the mounting portion is adjacent to a bottom end face of the housing; the mounting part is of an arc-shaped structure; the strip-shaped holes are strip-shaped arc-shaped holes.
Further, the outer shape of the shell is square.
Compared with the prior art, the utility model has the following advantages:
the utility model combines the shell, the cover, the fiber grating and the inner core body, improves the inner core body and the fiber grating, forms the inner core body by the fiber fixing block, the connecting sheet and the quality core body, adopts one end of the two fiber gratings to respectively penetrate through the left side and the right side of the shell, is connected with the left side and the right side of the fiber fixing block, and then extends to the quality core body to form two detection points.
Drawings
The utility model will be described in further detail with reference to the drawings and the detailed description.
Fig. 1 is an exploded perspective view of a high-precision fiber bragg grating tilt sensor according to the present utility model.
Fig. 2 is a schematic perspective view of a high-precision fiber bragg grating inclination sensor according to the present utility model.
Fig. 3 is a schematic perspective view of the inner core body of the present utility model.
The drawings include:
the optical fiber grating comprises a shell 1, a mounting groove 11, an optical fiber grating 2, a cover 3, an inner core 4, an optical fiber fixing block 41, an embedding groove 411, a left optical fiber positioning groove 412, a right optical fiber positioning groove 413, a mass core 42, a connecting column 421, a measuring positioning groove 4211, a mass block 422, a connecting sheet 43, a screw 5, a mounting part 6 and a strip-shaped hole 61.
Detailed Description
The following describes in further detail the embodiments of the present utility model with reference to the drawings and examples. The following examples are illustrative of the utility model and are not intended to limit the scope of the utility model.
As shown in fig. 1 to 3, a high-precision fiber bragg grating inclination sensor comprises a housing 1, a cover 3, a fiber bragg grating 2 and an inner core 4; the outer shape of the shell 1 is square, and the cover 3 is connected to the shell 1 in a matching way; the housing 1 has a mounting groove 11; an inner core body 4 is connected in the mounting groove 11; the inner core body 4 comprises an optical fiber fixing block 41, a connecting sheet 43 and a mass core body 42; the front end of the optical fiber fixing block 41 is connected to the groove front side surface of the mounting groove 11; the mass core 42 is connected with the optical fiber fixing block 41 through the connecting sheet 43 and is suspended in the mounting groove 11; one end of one fiber grating 2 passes through the left side of the housing 1 and is connected to the left side of the fiber fixing block 41, and extends to the mass core 42; one end of the other fiber grating 2 passes through the right side of the housing 1 and is connected to the right side of the fiber fixing block 41, and extends to the mass core 42.
The high-precision fiber bragg grating inclination sensor is characterized in that a shell 1, a cover 3, a fiber bragg grating 2 and an inner core body 4 are arranged and combined, improvement is carried out on the inner core body 4 and the fiber bragg grating 2, an inner core body 4 is formed by a fiber bragg grating fixing block 41, a connecting sheet 43 and a quality core body 42, one ends of the two fiber bragg gratings 2 penetrate through the left side and the right side of the shell 1 respectively and are connected with the left side and the right side of the fiber bragg grating fixing block 41 and then extend to the quality core body 42 to form two detection points, when the high-precision fiber bragg grating inclination sensor is inclined, the quality core body 42 changes in angle from an original state, so that the tensile force of the two fiber bragg gratings 2 on the quality core body 42 changes, the change of fiber wavelength is measured, the change angle of structures such as a building is accurately measured in two directions, the inclination angle change of the structures such as the building is improved, and the error is small.
Wherein the mass core 42 comprises a connecting post 421 and a mass 422; the rear end of the optical fiber fixing block 41 is provided with an embedded slot 411 into which one end of the connecting post 421 can penetrate; one end of the connecting post 421 penetrates into the insertion slot 411 and is connected with the front side of the insertion slot 411 through the connecting piece 43; the other end of the connecting column 421 is connected with the mass 422; one end of a fiber grating 2 passes through the left side of the housing 1 and is connected to the left side of the fiber fixing block 41, and extends to one end of the connecting post 421; one end of the other fiber grating 2 passes through the right side of the housing 1 and is connected to the right side of the fiber fixing block 41, and extends to one end of the connection post 421. Through specifically setting up the relation of connection of two fiber bragg gratings 2 and the optical fiber fixed block 41 to and the relation of connection with the one end of spliced pole 421, can form two stable check points, when this high accuracy fiber bragg grating inclination sensor takes place the slope, after the change of angle has taken place for the quality piece 422 from the original state, thereby make two fiber bragg gratings 2 change the pulling force of spliced pole 421, measure the change of fiber wavelength, and then the angle that structure such as accurate measurement building changed from two directions, the accuracy of measuring the inclination change of structure such as building has been improved, the error is little.
More preferably, a left optical fiber positioning groove 412 is formed on the top surface of the optical fiber fixing block 41 from the left side of the optical fiber fixing block 41 to the left side of the insertion slot 411; a right-side optical positioning groove 413 is formed in the top end surface of the optical fiber fixing block 41 from the right side of the optical fiber fixing block 41 to the right side of the embedded groove 411; a measuring positioning groove 4211 is formed in the top end surface of one end of the connecting column 421; one end of the fiber bragg grating 2 passes through the left side of the housing 1, is embedded and connected in the left side fiber positioning groove 412, and extends to be embedded in the measurement positioning groove 4211; one end of the other fiber grating 2 is embedded and connected in the right optical positioning groove 413, and is extended and embedded in the measuring positioning groove 4211. By stably connecting the two fiber gratings 2, the high-precision fiber grating inclination sensor achieves the effect of stable and accurate measurement. Preferably, one end of the fiber bragg grating 2 is connected to the left fiber bragg grating positioning groove 412, and the other end of the fiber bragg grating 2 is connected to the right fiber bragg grating positioning groove 413 through silicone rubber, so that a good structure stability effect is achieved.
In order to stabilize the overall structure of the inner core body 4, the whole assembly is convenient, the production is convenient, and the optical fiber fixing block 41, the connecting sheet 43 and the mass core body 42 are integrally formed.
For easy assembly, disassembly, replacement and maintenance, the optical fiber fixing block 41 is connected to one groove side surface of the installation groove 11 by a screw 5. Preferably, the number of the screws 5 is 2.
In order to facilitate the installation of the high-precision fiber bragg grating inclination sensor on structures such as buildings, the two sides of the shell 1 are provided with installation parts 6; the mounting part 6 is provided with a strip-shaped hole 61, and the adopted strip-shaped hole 61 can penetrate through the strip-shaped hole 61 by adopting bolts to be connected with structures such as a building and the like, so that the high-precision fiber bragg grating inclination sensor is convenient to position fix and adjust and mount. Preferably, the mounting portion 6 is close to the bottom end surface of the housing 1; the mounting part 6 is of an arc-shaped structure; the strip-shaped holes 61 are strip-shaped arc-shaped holes, and the arc-shaped strip-shaped holes 61 are installed in an adjustable angle in the horizontal direction through the installation part 6 of the arc-shaped body structure, so that the appearance effect is good.
In summary, the embodiment of the present utility model provides a high-precision fiber bragg grating tilt sensor, where the high-precision fiber bragg grating tilt sensor is improved on an inner core 4 and a fiber bragg grating 2 by combining a housing 1, a cover 3, a fiber bragg grating 2 and the inner core 4, wherein one end of two fiber bragg gratings 2 respectively passes through the left side and the right side of the housing 1 and then is connected with the left side and the right side of the fiber bragg grating 41, and then extends to the mass core 42 to form two detection points, when the high-precision fiber bragg grating tilt sensor tilts, the influence of the stress effect of the single fiber bragg grating 2 on the mass core 42 is eliminated after the angle change occurs from an original state, so that the balance of forces is achieved, and the two fiber bragg gratings 2 measure the change of the fiber wavelength, and further accurately measure the angle of the change of the structure such as a building from two directions, so that the precision of measuring the tilt angle change of the structure such as the building is improved, and the error is small.
The foregoing is merely a preferred embodiment of the present utility model, and it should be noted that modifications and substitutions can be made by those skilled in the art without departing from the technical principles of the present utility model, and these modifications and substitutions should also be considered as being within the scope of the present utility model.
Claims (10)
1. A high-precision fiber bragg grating inclination sensor comprises a shell, a cover and a fiber bragg grating; the cover is connected to the shell in a matching way; the shell is characterized by comprising a mounting groove; an inner core body is connected in the mounting groove; the inner core body comprises an optical fiber fixing block, a connecting sheet and a mass core body;
the front end of the optical fiber fixing block is connected to the front side surface of the mounting groove;
the mass core body is connected with the optical fiber fixing block through the connecting sheet and is suspended in the mounting groove;
one end of a fiber grating passes through the left side of the shell, is connected to the left side of the fiber fixing block and extends to the mass core;
one end of the other fiber grating passes through the right side of the shell, is connected to the right side of the fiber fixing block and extends to the mass core.
2. The high-precision fiber bragg grating tilt sensor of claim 1, wherein said mass core comprises a connecting post and a mass;
the rear end of the optical fiber fixing block is provided with an embedded groove for one end of the connecting column to penetrate;
one end of the connecting column penetrates into the embedded groove and is connected with the groove front side surface of the embedded groove through the connecting sheet; the other end of the connecting column is connected with the mass block;
one end of a fiber grating passes through the left side of the shell and is connected to the left side of the fiber fixing block, and extends to one end of the connecting column;
one end of the other fiber grating passes through the right side of the shell, is connected to the right side of the fiber fixing block, and extends to one end of the connecting column.
3. The high-precision fiber bragg grating inclination sensor according to claim 2, wherein a left-side fiber positioning groove is formed in the top end face of the fiber fixing block from the left side of the fiber fixing block to the left side of the embedded groove;
a right-side optical fiber positioning groove is formed in the top end face of the optical fiber fixing block from the right side of the optical fiber fixing block to the right side of the embedded groove;
a measuring positioning groove is formed in the top end face of one end of the connecting column;
one end of the fiber bragg grating penetrates through the left side of the shell, is embedded and connected in the left fiber bragg grating positioning groove, and extends and is embedded in the measurement positioning groove;
one end of the other fiber bragg grating is embedded and connected in the right-side optical positioning groove and is embedded in the measuring positioning groove in an extending mode.
4. The high-precision fiber bragg grating inclination sensor according to claim 3, wherein one end of the fiber bragg grating is fixedly connected with the left fiber bragg grating positioning groove, and the other end of the fiber bragg grating is fixedly connected with the right fiber bragg grating positioning groove through silicone rubber.
5. The high-precision fiber bragg grating inclination sensor according to claim 1 or 2, wherein the fiber fixing block, the connecting piece and the mass core are integrally formed.
6. The high-precision fiber bragg grating tilt sensor of claim 1, wherein said fiber securing block is attached to one slot side of said mounting slot by a screw.
7. The high-precision fiber bragg grating tilt sensor of claim 6, wherein the number of screws is 2.
8. The high-precision fiber bragg grating inclination sensor according to claim 1, wherein mounting parts are arranged on both sides of the housing; the mounting part is provided with a strip-shaped hole.
9. The high-precision fiber bragg grating tilt sensor of claim 8, wherein said mounting portion is proximate to a bottom end surface of said housing; the mounting part is of an arc-shaped structure; the strip-shaped holes are strip-shaped arc-shaped holes.
10. The high-precision fiber bragg grating tilt sensor of claim 1, wherein the housing has a square shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320410194.7U CN219532040U (en) | 2023-03-06 | 2023-03-06 | High-precision fiber bragg grating inclination sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320410194.7U CN219532040U (en) | 2023-03-06 | 2023-03-06 | High-precision fiber bragg grating inclination sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219532040U true CN219532040U (en) | 2023-08-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320410194.7U Active CN219532040U (en) | 2023-03-06 | 2023-03-06 | High-precision fiber bragg grating inclination sensor |
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| Country | Link |
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| CN (1) | CN219532040U (en) |
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- 2023-03-06 CN CN202320410194.7U patent/CN219532040U/en active Active
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