CN210321628U - Correction device for detecting deformation of fiber bragg grating - Google Patents
Correction device for detecting deformation of fiber bragg grating Download PDFInfo
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- CN210321628U CN210321628U CN201921561565.1U CN201921561565U CN210321628U CN 210321628 U CN210321628 U CN 210321628U CN 201921561565 U CN201921561565 U CN 201921561565U CN 210321628 U CN210321628 U CN 210321628U
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Abstract
The utility model belongs to a detection device especially relates to a correcting unit that is used for fiber grating to detect deformation. The fiber grating sensor is used for detecting deformation, so that detection technologies such as component detection, concrete foundation detection, deformation detection of numerical control machines and the like are improved and developed. The device comprises a correction device for correcting the fiber bragg grating deformation detection sensor; the correcting device comprises a support, a left fixing support and a right fixing support which are arranged on the support, and a loading support which is arranged on the support; the deformation detection sensor is supported above the support through a left fixing frame and a right fixing frame; the loading support is detachably connected with the support, a loading piece is arranged on the loading support, and the loading piece is in contact with the deformation detection sensor and applies pressure to the deformation detection sensor; a plurality of displacement sensors are arranged on the support along the length direction, and contact pins of the displacement sensors are in contact with the bottoms of the deformation detection sensors.
Description
Technical Field
The invention belongs to a detection device, and particularly relates to a correction device for detecting deformation of an optical fiber grating.
Background
The deformation detection is to measure the deformation of the monitored object or object (deformation body), and to know the size, spatial distribution and time-dependent development of the deformation, and to make a correct analysis and prediction, which is also called deformation measurement. For example: deformation of concrete foundations, deformation of large members, deformation of numerically controlled machine tools, and the like. Which is related to the service life, the use safety and the use precision of the product.
However, during deformation detection, due to the limitation of the assembly and precision of the sensor, the conventional displacement sensor cannot detect the deformation of the concrete foundation, the large member, and the numerical control machine tool under the working conditions, and therefore, a new deformation detection sensor is needed to be provided, which can effectively detect the deformation of the member, the concrete foundation, the numerical control machine tool, and the like. And in order to provide measurement accuracy, the deformation detection sensor needs to be corrected. The measurement requirements have been met.
Disclosure of Invention
The invention provides a correction device for detecting deformation of fiber bragg grating, aiming at the defects in the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme that the device comprises a correction device for correcting the fiber bragg grating deformation detection sensor; the correcting device comprises a support, a left fixing support and a right fixing support which are arranged on the support, and a loading support which is arranged on the support; the left fixing support and the right fixing support are used as fiber grating deformation detection sensor supports and are detachably connected with the fiber grating deformation detection sensors respectively; the deformation detection sensor is supported above the support through a left fixing frame and a right fixing frame; the loading support is detachably connected with the support, a loading piece is arranged on the loading support, and the loading piece is in contact with the deformation detection sensor and applies pressure to the deformation detection sensor; a plurality of displacement sensors are arranged on the support along the length direction, and contact pins of the displacement sensors are in contact with the bottoms of the deformation detection sensors.
As a preferable aspect of the present invention, the fiber grating deformation detection sensor is a fiber grating sensor.
As a preferred scheme of the present invention, the fiber grating deformation detection sensor includes a to-be-detected carrier, a through groove is formed in the to-be-detected carrier along a length direction, and a fiber grating is arranged in the through groove; wherein, the carrier to be measured is a strip-shaped body.
As another preferable scheme of the invention, the support is a long strip-shaped structural body, and the bottom of the long strip-shaped structural body is provided with support legs which are detachably connected with the long strip-shaped structural body; the displacement sensor mounting structure comprises a support, a plurality of displacement sensors and a plurality of displacement sensors, wherein the support is provided with a plurality of displacement sensor mounting holes (for example, in threaded connection or in buckling connection), and the displacement sensors are mounted on the support through the mounting holes.
In a preferred embodiment of the present invention, the support has an hourglass shape in cross section.
As a preferred scheme of the invention, the left fixing support and the right fixing support have the same structure and are both block-shaped bodies, and a fixing support hole and a support hole are arranged on the block-shaped bodies along the length direction; the shape of the support hole is the same as that of the support, the size of the support hole meets the requirement that the support can penetrate through the support hole, the block-shaped body is arranged on the support through the support hole, a support fixing jackscrew for limiting is arranged on the block-shaped body and on one side of the support hole, the support fixing jackscrew is in threaded connection with the block-shaped body, the support fixing jackscrew penetrates through the block-shaped body and is tightly jacked against the support, the process that the support fixing jackscrew is screwed into the block-shaped body is adjusted, and the support in the support hole can be loosened or tightly jacked; the fixed support hole is used for placing a deformation detection sensor, and the deformation detection sensor penetrates through the fixed support hole and is placed on the left fixed support and the right fixed support through the fixed support hole; and the sensor fixing jackscrew is also arranged on the block body and is in threaded connection with the block body, the depth of the sensor fixing jackscrew screwed into the fixing support hole is adjusted, and the deformation detection sensor in the fixing support hole can be loosened or tightly jacked.
As another preferred scheme of the invention, the loading support is positioned between the left fixing support and the right fixing support, the loading support comprises a block-shaped body, a through hole for the support to pass through is formed in the block-shaped body, the shape of the through hole is matched with that of the support, and loading fixing jackscrews are arranged on two sides of the block-shaped body; the top of the loading bracket is provided with a loading piece, and the loading piece is fastened on the loading bracket through a loading force control jackscrew; when the device is used, the support penetrates through the through hole, and the jackscrew is controlled by the loading force to jack tightly and limit; and the loading piece is contacted with the deformation detection sensor on the support, and the deformation detection sensor is applied with force through the loading piece.
In another preferred embodiment of the present invention, the loading piece is made of hardened and tempered steel.
Compared with the prior art, the invention has the beneficial effects.
The invention applies the fiber grating sensor to detect deformation, so that detection technologies such as component detection, concrete foundation detection, deformation detection of numerical control machines and the like are improved and developed. In order to further improve the measurement precision, the fiber bragg grating sensor is corrected, so that the measurement result is greatly improved.
Drawings
The invention is further described with reference to the following figures and detailed description. The scope of the invention is not limited to the following expressions.
Fig. 1-2 are schematic diagrams of the overall structure of the present invention.
Fig. 3 is a schematic view of a sensor of the present invention.
Fig. 4 is a side schematic view of fig. 3 of the present invention.
FIG. 5 is a schematic view of a loading stand according to the present invention.
Fig. 6 is a schematic view of the present invention on a support.
FIG. 7 is a schematic structural view of the left and right fixing brackets of the present invention.
In the figure, 1 is a deformation detection sensor, 2 is a left fixing support, 3 is a support, 4 is a loading support, 5 is a right fixing support, 6 is a support fixing jackscrew, 9 is a displacement sensor arrangement hole, 10 is a sensor fixing jackscrew, 11 is a loading fixing jackscrew, 12 is a loading force control jackscrew, 13 is a loading piece, 15 is an optical fiber grating, 16 is a through groove, 17 is a fixing support hole, and 18 is a support leg.
Detailed Description
As shown in fig. 1 to 7, the present invention includes a correction device for correcting the fiber grating deformation detection sensor 1; the correcting device comprises a support 3, a left fixing support 2 and a right fixing support 5 which are arranged on the support 3, and a loading support 4 which is arranged on the support 3; the left fixing support 2 and the right fixing support 5 are used as supports of the fiber grating deformation detection sensor 1 and are detachably connected with the fiber grating deformation detection sensor 1 respectively; the deformation detection sensor 1 is supported above the support 3 through a left fixing frame and a right fixing support 5; the loading support 4 is detachably connected with the support 3, a loading piece 13 is arranged on the loading support 4, and the loading piece 13 is in contact with the deformation detection sensor 1 and applies pressure to the deformation detection sensor 1; a plurality of displacement sensors are arranged on the support 3 along the length direction, and contact pins of the displacement sensors are in contact with the bottom of the deformation detection sensor 1.
Preferably, the fiber grating deformation detection sensor 1 is a fiber grating sensor.
Preferably, the fiber bragg grating deformation detection sensor 1 includes a carrier to be detected, a through groove 16 is formed in the carrier to be detected along the length direction, and a fiber bragg grating 15 is arranged in the through groove 16; wherein, the carrier to be measured is a strip-shaped body.
More specifically, the cross-sectional shape of the fiber grating deformation detection sensor 1 is finally determined according to different objects to be measured so as to be fixed to the objects to be measured, for example: the circular section can be selected for detecting the deformation of the concrete foundation (the fixing method is to bind the concrete foundation on a concrete reinforcement layer); the rectangular section can be selected when the large-span steel structural part is detected (the fixing method is magnet adsorption or glue bonding). Q235 steel is selected as the carrier to be detected of the fiber bragg grating deformation detection sensor 1.
The correcting device comprises a support 3, a left fixing support 2 and a right fixing support 5 which are arranged on the support 3, and a loading support 4 which is arranged on the support 3; the left fixing support 2 and the right fixing support 5 are used as the supports of the fiber grating deformation detection sensor 1 and are detachably connected with the fiber grating 15 deformation detection sensor 1 respectively; the fiber bragg grating sensor is supported above the support 3 through a left fixing frame and a right fixing support 5; the loading support 4 is detachably connected with the support 3, a loading piece 13 is arranged on the loading support 4, and the loading piece 13 is in contact with the deformation detection sensor 1 and applies pressure to the deformation detection sensor 1; a plurality of displacement sensors are arranged on the support 3 along the length direction, and contact pins of the displacement sensors are in contact with the bottom of the deformation detection sensor 1.
Preferably, the support 3 is a long strip-shaped structural body, the bottom of the long strip-shaped structural body is provided with a support leg 18, and the support leg 18 is detachably connected with the long strip-shaped structural body; a plurality of displacement sensor arrangement holes 9 are arranged on the support 3 (for example, in a threaded connection or a snap connection), and a plurality of displacement sensors are arranged on the support 3 through the arrangement holes.
Preferably, the support 3 has an hourglass shape in cross-section.
Preferably, the left fixing support 2 and the right fixing support 5 have the same structure and are both block-shaped bodies, and fixing support holes 17 and support 3 holes are formed in the block-shaped bodies along the length direction; the shape of the hole of the support 3 is the same as that of the support 3, the size of the hole meets the requirement that the support 3 can penetrate through the hole of the support 3, the block-shaped body is arranged on the support 3 through the hole of the support 3, a support fixing jackscrew 6 for limiting is arranged on one side of the hole of the support 3 on the block-shaped body, the support fixing jackscrew 6 is in threaded connection with the block-shaped body, the support fixing jackscrew 6 penetrates through the block-shaped body and is tightly jacked against the support 3, the process that the support fixing jackscrew 6 is screwed into the block-shaped body is adjusted, and the support 3 in the hole of the; the fixed support hole 17 is used for placing the deformation detection sensor 1, and the deformation detection sensor 1 penetrates through the fixed support hole 17 and is placed on the left fixed support 2 and the right fixed support 5 through the fixed support hole 17; and the block-shaped body is also provided with a sensor fixing jackscrew 10, the sensor fixing jackscrew 10 is in threaded connection with the block-shaped body, the depth of the sensor fixing jackscrew 10 screwed into the fixing support hole 17 is adjusted, and the deformation detection sensor 1 in the fixing support hole 17 can be loosened or tightly jacked.
Preferably, the loading support 4 is located between the left fixing support 2 and the right fixing support 5, the loading support 4 comprises a block-shaped body, a through hole for the support 3 to pass through is formed in the block-shaped body, the shape of the through hole is matched with that of the support 3, and loading fixing jackscrews 11 are arranged on two sides of the block-shaped body; a loading piece 13 is arranged at the top of the loading support 4, and the loading piece 13 is fastened on the loading support 4 through a loading force control jackscrew 12; when the device is used, the support 3 penetrates through the through hole, and the jackscrew 12 is controlled by the loading force to jack tightly and limit; and the loading piece 13 is in contact with the deformation detecting sensor 1 on the holder 3, and the deformation detecting sensor 1 is urged by the loading piece 13.
Preferably, the loading piece 13 is made of hardened and tempered steel.
The principle of applying the fiber bragg grating 15 deformation detection sensor 1 to detect the deformation of the object to be detected is as follows: the deformation condition of the whole fiber grating deformation detection sensor 1 can be obtained by obtaining the deformation value of the distribution points of the fiber grating 15 and fitting the deformation value into a deformation curve by using a least square method, the deformation value measured by the fiber grating deformation detection sensor 1 is corrected by using a correction device for detecting deformation of the fiber grating 15, the fiber grating deformation detection sensor 1 is fixed at the position to be detected of an object to be detected, the deformation value of the fiber grating deformation detection sensor 1 is the deformation data of the fixed position of the object to be detected due to the deformation coordination relationship between the fiber grating deformation detection sensor 1 and the object to be detected, and the acquired data is subjected to data processing by a fiber grating demodulator to obtain the deformation data of the object to be detected.
The fiber grating deformation detection sensor 1 is fixed on a support 3 through a left fixing support 2 and a right fixing support 5, the left end of the fiber grating deformation detection sensor 1 is fixed in a fixing support hole 17 through a rotary sensor fixing jackscrew 10, the right end of the fiber grating deformation detection sensor 1 is fixed by the right fixing support 5 in the same method, and the left fixing support 2 and the right fixing support 5 can move left and right on the support 3 to conveniently fix the fiber grating deformation detection sensors 1 with different lengths. And then fixing the left fixing support 2 and the right fixing support 5 on the support 3 through the rotating support fixing jackscrew 6, adjusting the position of acting force on the fiber grating deformation detection sensor 1 by moving the loading support 4, and screwing the loading fixing jackscrew 11 after determining the loading position to fix the loading support 4 on the support 3.
The loading piece 13 is contacted with the fiber grating deformation detection sensor 1, the jackscrew 12 is controlled by screwing the loading force to reduce the gap between the loading piece 13 and the loading support 4, so that the loading piece 13 is more tightly attached to the upper surface of the fiber grating 15 detection sensor, the fiber grating 15 detection sensor (a sensor to-be-detected carrier) is deformed, the jackscrew 12 is controlled by continuing screwing the loading force to properly adjust the acting force, the fiber grating 15 detection sensor is deformed to different degrees, the loading support 4 can move on the support 3, and the position of deformation of the fiber grating deformation detection sensor 1 can be controlled by moving.
The displacement sensor arrangement holes 9 are uniformly distributed on the support 3, and the displacement sensors are arranged through the displacement sensor arrangement holes 9. The deformation condition of the fiber grating deformation detection sensor 1 at each displacement sensor is collected through the displacement sensors, the displacement data of all the distributed points are fitted, the integral deformation condition of the fiber grating deformation detection sensor 1 can be obtained, the calibration of the fiber grating deformation detection sensor 1 is completed, and finally the deformation data fitted with the fiber grating deformation detection sensor 1 is compared, and the deformation data of the fiber grating deformation detection sensor 1 is corrected.
It should be understood that the detailed description of the present invention is only for illustrating the present invention and is not limited by the technical solutions described in the embodiments of the present invention, and those skilled in the art should understand that the present invention can be modified or substituted equally to achieve the same technical effects; as long as the use requirements are met, the method is within the protection scope of the invention.
Claims (8)
1. A correction device for detecting deformation of a fiber grating comprises a correction device for correcting a fiber grating deformation detection sensor; the device is characterized in that the correcting device comprises a support, a left fixed support and a right fixed support which are arranged on the support, and a loading support which is arranged on the support; the left fixing support and the right fixing support are used as fiber grating deformation detection sensor supports and are detachably connected with the fiber grating deformation detection sensors respectively; the deformation detection sensor is supported above the support through a left fixing frame and a right fixing frame; the loading support is detachably connected with the support, a loading piece is arranged on the loading support, and the loading piece is in contact with the deformation detection sensor and applies pressure to the deformation detection sensor; a plurality of displacement sensors are arranged on the support along the length direction, and contact pins of the displacement sensors are in contact with the bottoms of the deformation detection sensors.
2. A correction device for fiber grating detected deformation according to claim 1, characterized in that: the fiber grating deformation detection sensor adopts a fiber grating sensor.
3. A correction device for fiber grating detected deformation according to claim 1, characterized in that: the fiber bragg grating deformation detection sensor comprises a carrier to be detected, wherein a through groove is formed in the carrier to be detected along the length direction, and fiber bragg gratings are arranged in the through groove; wherein, the carrier to be measured is a strip-shaped body.
4. A correction device for fiber grating detected deformation according to claim 1, characterized in that: the support is a strip-shaped structure body, and the bottom of the strip-shaped structure body is provided with support legs which are detachably connected with the strip-shaped structure; a plurality of displacement sensor arrangement holes are formed in the support, and the displacement sensors are installed on the support through the arrangement holes.
5. A correction device for fiber grating detection deformation according to claim 1 or 4, characterized in that: the cross section of the support is hourglass-shaped.
6. A correction device for fiber grating detection deformation according to claim 1 or 4, characterized in that: the left fixing support and the right fixing support are of the same structure and are both block-shaped bodies, and fixing support holes and support holes are formed in the block-shaped bodies along the length direction; the shape of the support hole is the same as that of the support, the size of the support hole meets the requirement that the support can penetrate through the support hole, the block-shaped body is arranged on the support through the support hole, a support fixing jackscrew for limiting is arranged on the block-shaped body and on one side of the support hole, the support fixing jackscrew is in threaded connection with the block-shaped body, the support fixing jackscrew penetrates through the block-shaped body and is tightly jacked against the support, the process that the support fixing jackscrew is screwed into the block-shaped body is adjusted, and the support in the support hole can be loosened or tightly jacked; the fixed support hole is used for placing a deformation detection sensor, and the deformation detection sensor penetrates through the fixed support hole and is placed on the left fixed support and the right fixed support through the fixed support hole; and the sensor fixing jackscrew is also arranged on the block body and is in threaded connection with the block body, the depth of the sensor fixing jackscrew screwed into the fixing support hole is adjusted, and the deformation detection sensor in the fixing support hole can be loosened or tightly jacked.
7. The apparatus according to claim 6, wherein: the loading support is positioned between the left fixing support and the right fixing support and comprises a block-shaped body, a through hole for the support to pass through is formed in the block-shaped body, the shape of the through hole is matched with that of the support, and loading fixing jackscrews are arranged on two sides of the block-shaped body; the top of the loading bracket is provided with a loading piece, and the loading piece is fastened on the loading bracket through a loading force control jackscrew; when the device is used, the support penetrates through the through hole, and the jackscrew is controlled by the loading force to jack tightly and limit; and the loading piece is contacted with the deformation detection sensor on the support, and the deformation detection sensor is applied with force through the loading piece.
8. A correction device for fiber grating detected deformation according to claim 7, characterized in that: the loading piece is made of hardened and tempered steel.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921561565.1U CN210321628U (en) | 2019-09-19 | 2019-09-19 | Correction device for detecting deformation of fiber bragg grating |
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| CN201921561565.1U CN210321628U (en) | 2019-09-19 | 2019-09-19 | Correction device for detecting deformation of fiber bragg grating |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110455213A (en) * | 2019-09-19 | 2019-11-15 | 沈阳理工大学 | A kind of correcting device for fiber grating detection deformation |
| CN112066904A (en) * | 2020-09-30 | 2020-12-11 | 中国电力科学研究院有限公司 | Distributed optical fiber strain sensing calibration system and method |
| CN114674674A (en) * | 2022-05-26 | 2022-06-28 | 四川航天拓达玄武岩纤维开发有限公司 | Linear measuring device and measuring method for basalt fiber pipe quality inspection |
-
2019
- 2019-09-19 CN CN201921561565.1U patent/CN210321628U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110455213A (en) * | 2019-09-19 | 2019-11-15 | 沈阳理工大学 | A kind of correcting device for fiber grating detection deformation |
| CN110455213B (en) * | 2019-09-19 | 2024-03-08 | 沈阳理工大学 | Correcting device for detecting deformation of fiber bragg grating |
| CN112066904A (en) * | 2020-09-30 | 2020-12-11 | 中国电力科学研究院有限公司 | Distributed optical fiber strain sensing calibration system and method |
| CN114674674A (en) * | 2022-05-26 | 2022-06-28 | 四川航天拓达玄武岩纤维开发有限公司 | Linear measuring device and measuring method for basalt fiber pipe quality inspection |
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