CN213778925U - Three-dimensional strain sensor - Google Patents
Three-dimensional strain sensor Download PDFInfo
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- CN213778925U CN213778925U CN202023021781.2U CN202023021781U CN213778925U CN 213778925 U CN213778925 U CN 213778925U CN 202023021781 U CN202023021781 U CN 202023021781U CN 213778925 U CN213778925 U CN 213778925U
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Abstract
The application relates to the field of strain measurement, in particular to a three-dimensional strain rosette sensor, which has the technical scheme that the three-dimensional strain rosette sensor comprises a deformation sheet and an optical fiber welded on the surface of the deformation sheet, wherein the deformation sheet is in an equilateral triangle shape and is welded on the surface of a steel structure; the optical fiber extends to the surface of the deformation sheet from one vertex angle of the deformation sheet and extends out of the surface of the deformation sheet from the same vertex angle; the optical fibers are wound into an equilateral triangle, and three sides of the triangle surrounded by the optical fibers are respectively parallel to one of three sides of the deformation sheet; the optical fiber is connected with the fiber grating demodulator; the method and the device achieve the purposes that one sensor can simultaneously measure the three-dimensional strain, so that the construction difficulty is reduced, the efficiency is improved, the space occupation of the sensor is reduced, and the process attractiveness is improved.
Description
Technical Field
The application relates to the field of strain measurement, in particular to a three-dimensional strain rosette sensor.
Background
Steel structures are widely used in both the construction and mechanical fields; the steel structure is stressed to generate strain in the using process; the mechanical property of the steel structure is influenced by overlarge strain; therefore, strain measurement of steel structures is very necessary.
The strain measurement method of the steel structure recorded in the related art comprises the following steps of connecting and welding three optical fibers in series on the surface to be detected of the steel structure, wherein every two of the three optical fibers are 45 degreesoAngular distribution; when the steel structure generates three directions in a plane, namely 0o、45oAnd 90oWhen the strain is generated, the optical fiber is correspondingly stretched or compressed, and the strain amount of the steel structure is obtained through a fiber grating demodulator.
In view of the above-mentioned related art solutions, the inventors found that: every optical fiber sensor needs to be welded on the surface of a steel structure, the construction difficulty is high, the efficiency is low, optical fiber connection is disordered, and the occupied space is large.
SUMMERY OF THE UTILITY MODEL
In order to realize that a sensor can carry out the measurement of three-dimensional straying simultaneously to reduce the construction degree of difficulty, raise the efficiency, reduce the space occupation of sensor and improve the pleasing to the eye degree of technology, this application provides a three-dimensional straying flower sensor.
The application provides a three-dimensional strain rosette sensor adopts following technical scheme:
a three-dimensional strain rosette sensor comprises a deformation sheet and an optical fiber welded on the surface of the deformation sheet, wherein the deformation sheet is in an equilateral triangle shape and is welded on the surface of a steel structure; the optical fiber extends to the surface of the deformation sheet from one vertex angle of the deformation sheet and extends out of the surface of the deformation sheet from the same vertex angle; the optical fibers are wound into an equilateral triangle, and three sides of the triangle surrounded by the optical fibers are respectively parallel to one of three sides of the deformation sheet; the optical fiber is connected with the fiber grating demodulator.
By adopting the technical scheme, as the deformation sheet is welded on the surface of the steel structure, when the steel structure generates strain, the deformation sheet also generates strain; at the moment, the optical fiber on the deformation sheet is also subjected to strain, and the fiber bragg grating demodulator further solves the strain signal; because three sections of the same optical fiber which are respectively positioned on three sides of the deformation sheet are regarded as being connected in series, one optical fiber does not need to be cut into three sections and is welded in series; the three-dimensional strain measurement can be simultaneously carried out by one sensor, so that the construction difficulty is reduced, the efficiency is improved, the space occupation of the sensor is reduced, and the process attractiveness is improved.
Preferably, three wiring grooves which are connected end to end in pairs are formed in the deformation sheet, and the three wiring grooves are parallel to one of three sides of the deformation sheet respectively; the optical fiber can be embedded inside the wiring groove.
Through adopting above-mentioned technical scheme, inside optic fibre embedding wiring groove, when having improved optic fibre wiring on the one hand and the limit of deformation piece between the depth of parallelism and then improve the 60 between the optic fibre three-sectionoThe accuracy of the included angle; on the other hand, the optical fiber can be more stably arranged on the deformation sheet, and the possibility that the optical fiber falls off from the deformation sheet is reduced.
Preferably, three top corners of the deformation sheet are provided with wire grooves communicated with the wiring grooves; the optical fiber can enter the wiring groove through the wire groove and extend to the surface of the deformation sheet through the wire groove.
Through adopting above-mentioned technical scheme, optic fibre passes through the wire casing and gets into the wiring groove and extends away from the wiring groove through the wire casing, has further reduced the possibility that optic fibre dropped from the morphotropic piece.
Preferably, two first dividing grooves are formed in the position, close to each vertex angle, of the deformation sheet, the two first dividing grooves are respectively formed in two edges of the deformation sheet, and the extending direction of the first dividing grooves is perpendicular to the direction of the deformation sheet; each edge of the deformation sheet is also provided with a second dividing groove parallel to the extending direction of the first dividing groove, and the second dividing groove is arranged on one side of the first dividing groove far away from the close vertex; the area between the first dividing groove and the second dividing groove is an elastic sheet.
Through adopting above-mentioned technical scheme, the limit position department that the flexure strip made the deformation piece is more easy to take place to meet an emergency along with the deformation on steel frame construction surface, makes the deformation piece along the deformation of perpendicular to limit direction easier, has improved the strain sensitivity of deformation piece.
Preferably, the elastic sheet is provided with a circular welding groove, and the welding groove is formed in the wiring groove of the deformation sheet.
By adopting the technical scheme, after the optical fiber is embedded into the wiring groove, the welding position of the optical fiber can be positioned through the welding groove, and the welding groove can accommodate the molten optical fiber so as to reduce the possibility that the molten optical fiber flows out of the surface of the deformation sheet; in addition, the elastic sheet is easier to deform, and the optical fibers are easier to generate strain along with the deformation of the elastic sheet by fixing the optical fibers on each elastic sheet, so that the sensitivity is further improved.
Preferably, three circular positioning holes are formed in three top corners of the deformation sheet, and the circle center of the positioning hole at each top corner is located in the extending direction of the first dividing groove at the top corner.
Through adopting above-mentioned technical scheme, the locating hole plays the positioning action for the sensor encapsulation to it encapsulates this sensor more conveniently accurately.
Preferably, three first strength reducing holes are formed in each vertex angle of the deformation sheet, and the three first strength reducing holes are communicated with each other and distributed in a Y shape; one of them first hole of reducing the intensity extends to the direction that is close to the shape of deformation piece centroid, and two other first holes of reducing the intensity are seted up respectively on one of two flexure strips of same apex angle department.
Through adopting above-mentioned technical scheme, first hole of subtracting strengthens has reduced the intensity of flexure strip, and then makes the flexure strip change and take place deformation, has further improved the strain sensitivity of deformation piece.
Preferably, the deformation sheet is further provided with three second strength reducing holes, and the three second strength reducing holes are respectively formed close to one of the three vertex angles of the deformation sheet; the both ends in second subtracts strong hole extend on to two elastic sheets of this second subtract strong hole place apex angle department respectively, and the middle section in second subtract strong hole extends in order to avoid first subtracting strong hole to offer to the centroid that is close to the shape deformation piece.
Through adopting above-mentioned technical scheme, the second subtracts strong hole and has reduced the intensity of flexure strip, and then makes the flexure strip change and take place deformation, has further improved the strain sensitivity of deformation piece.
In summary, the present application has the following technical effects:
1. by arranging the triangular deformation sheet, three sections of the same optical fiber respectively positioned on three sides of the deformation sheet are regarded as being connected in series; therefore, one sensor can measure the three-dimensional strain simultaneously, so that the construction difficulty is reduced, the efficiency is improved, and the space occupation of the sensor is reduced;
2. through having set up elasticity, make the deformation piece can take place corresponding deformation along with steel construction surface's deformation more easily, reduced the steel construction and taken place deformation and the deformation piece is difficult to take place or does not take place the possibility of deformation, improved the sensitivity of deformation piece.
Drawings
FIG. 1 is a structural view of a deformable sheet in an embodiment of the present application;
fig. 2 is a structural view of an optical fiber soldered to a deformable sheet in the embodiment of the present application.
In the figure, 1, deformation sheet; 2. an optical fiber; 3. wiring grooves; 4. a wire guide groove; 5. welding a groove; 6. a first dividing groove; 7. a second dividing groove; 8. an elastic sheet; 9. positioning holes; 10. a first strength reducing aperture; 11. a second reinforcement reducing aperture.
Detailed Description
The present application is described in further detail below with reference to the attached drawings.
Referring to fig. 1 and 2, the application provides a three-dimensional strain rosette sensor, which comprises a deformation sheet 1, wherein the deformation sheet 1 is in an equilateral triangle shape, and one surface of the deformation sheet 1 is welded on the surface of a steel structure; an optical fiber 2 connected with the fiber grating demodulator is welded on the deformation sheet 1, and the optical fiber 2 extends from a vertex angle of the deformation sheet 1 to the surface of the deformation sheet 1 and extends from the same vertex angle to a direction far away from the deformation sheet 1; on the surface of the deformation sheet 1The optical fiber 2 is bent into three sections, and each section is respectively parallel to one of three sides of the deformation sheet 1; the deformation sheet 1 is welded on the surface of the steel structure, so when the surface of the steel structure deforms, the deformation sheet 1 deforms, the optical fiber 2 is also strained along with the strain of the deformation sheet 1 as the optical fiber 2 is welded on the deformation sheet 1, and the optical fiber grating demodulator is used for solving a strain signal of the optical fiber 2 so as to calculate the strain of the surface of the steel structure; three sections of optical fiber 2 form 120oThe included angle is regarded as being connected through the series connection mode, like this, realizes that a sensor can carry out the measurement of three-dimensional strain simultaneously to reduce the construction degree of difficulty, raise the efficiency, reduce the space of sensor and occupy and improve the pleasing to the eye degree of technology.
Referring to fig. 1 and 2, three wiring grooves 3 which are communicated end to end are formed in the deformation sheet 1, and the three wiring grooves 3 are respectively close to one of three edges of the deformation sheet 1 and are parallel to the edge of the deformation sheet 1; the optical fiber 2 is embedded into the wiring groove 3; on one hand, the parallelism of the edges of the optical fiber 2 and the deformation sheet 1 is improved, and further, the three sections of the optical fiber 2 which form 120 in pairs are improvedoThe accuracy of the included angle enables the measurement of the sensor to be more accurate; on the other hand, the groove wall and the groove bottom of the wiring groove 3 limit the circumferential surface of the optical fiber 2, and the possibility that the optical fiber 2 falls off from the deformation sheet 1 is reduced.
Referring to fig. 1 and 2, three corners of the deformation sheet 1 are respectively provided with a wire groove 4 communicated with two adjacent wiring grooves 3, and the optical fiber 2 can extend into the wiring grooves 3 through the wire grooves 4 to reach the surface of the deformation sheet 1 and can extend from the wiring grooves 3 to a direction far away from the deformation sheet 1 through the same wire groove 4; thus, the exposure of the optical fiber 2 to the outside of the deformation sheet 1 is reduced, and the possibility of the optical fiber 2 falling off from the deformation sheet 1 is further reduced.
Referring to fig. 1, each edge of the deformable sheet 1 is provided with two first dividing grooves 6, the two first dividing grooves 6 are respectively arranged near two vertex angles where one edge of the deformable sheet 1 is located, and the extending direction of the first dividing grooves 6 is perpendicular to the edge where the first dividing grooves 6 are located; each edge of the deformation sheet 1 is provided with two second dividing grooves 7, and the second dividing grooves 7 are positioned on one side of the first dividing grooves 6 far away from the close vertex and are parallel to the extending direction of the first dividing grooves 6; the area clamped between the first dividing groove 6 and the second dividing groove 7 is an elastic sheet 8; thus, when the elastic piece 8 of the deformation piece 1 is easy to generate strain, the possibility that the deformation piece 1 is not deformed due to the strain generated in the steel structure expression is reduced.
Referring to fig. 1 and 2, a circular welding groove 5 is formed in the elastic sheet 8, and the center of the welding groove 5 is located inside the wiring groove 3; when the optical fiber 2 needs to be welded, the welding spot is aligned to the welding groove 5, and the welding groove 5 can further accommodate the fused optical fiber 2, so that on one hand, people can conveniently determine the welding position of the optical fiber 2, the optical fiber 2 can be fixed on each elastic sheet 8, the optical fiber 2 is more prone to generating strain along with the deformation of the elastic sheets 8, and the sensitivity is improved; on the other hand, the flow of the molten optical fiber 2 from the surface of the deformable sheet 1 is reduced.
Referring to fig. 1, three circular positioning holes 9 are formed in the deformation sheet 1, the three positioning holes 9 are respectively formed near one of three vertexes of the deformation sheet 1, and the center of the positioning hole 9 is located in the extending direction of the first dividing groove 6; three first strength reducing holes 10 which are mutually communicated are formed in each vertex angle of the deformation sheet 1, the first strength reducing holes 10 are positioned on one side, close to the centroid of the deformation sheet 1, of the positioning hole 9, the three first strength reducing holes 10 are distributed in a Y shape, two of the first strength reducing holes 10 extend to the elastic sheet 8, and the other first strength reducing hole 10 extends to the centroid of the deformation sheet 1; the deformation sheet 1 is also provided with three second strength reducing holes 11 respectively close to one of three top angles of the deformation sheet 1, two ends of each second strength reducing hole 11 extend towards the elastic sheet 8, and the middle section of each second strength reducing hole 11 extends towards the direction close to the centroid of the deformation sheet 1 so as to avoid the second dividing groove 7 and the first strength reducing hole 10; the positioning hole 9 plays a role in positioning the sensor package so as to more conveniently and accurately package the sensor; through seting up first hole 10 and the second hole 11 that reduces the intensity that reduces the flexure strip 8, it is easier to make the production of meeting an emergency of flexure strip 8, has further reduced the steel construction performance and has taken place the strain and the possibility that deformation piece 1 did not take place deformation.
To sum up, the application process of this application is: welding optic fibre 2 on morphotropic film 1, again with morphotropic film 1 welding on the steel construction surface, when steel construction surface produced the meeting an emergency, the flexure strip 8 on morphotropic film 1 and the morphotropic film 1 also produced the meeting an emergency thereupon, and then makes optic fibre 2 also produce the meeting an emergency along with the deformation of flexure strip 8, and fiber grating demodulator is solved optic fibre 2's the signal of meeting an emergency, and then calculates out the dependent variable on steel construction surface.
The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.
Claims (8)
1. A three-dimensional strain rosette sensor which is characterized in that: the optical fiber deformation device comprises a deformation sheet (1) and an optical fiber (2) welded on the surface of the deformation sheet (1), wherein the deformation sheet (1) is in an equilateral triangle shape and is welded on the surface of a steel structure; the optical fiber (2) extends to the surface of the deformation sheet (1) from one vertex angle of the deformation sheet (1) and extends out of the surface of the deformation sheet (1) from the same vertex angle; the optical fibers (2) are wound into an equilateral triangle, and three sides of the triangle formed by the optical fibers (2) are respectively parallel to one of three sides of the deformation sheet (1); the optical fiber (2) is connected with the fiber grating demodulator.
2. A three-dimensional strain rosette sensor as claimed in claim 1, wherein: three wire distribution grooves (3) which are connected end to end in pairs are formed in the deformation sheet (1), and the three wire distribution grooves (3) are respectively parallel to one of three edges of the deformation sheet (1); the optical fiber (2) can be embedded into the wiring groove (3).
3. A three-dimensional strain rosette sensor as claimed in claim 2, wherein: three vertex angles of the deformation sheet (1) are respectively provided with a wire groove (4) communicated with the wiring groove (3); the optical fiber (2) can enter the wiring groove (3) through the wire groove (4) and extend to the surface of the separation deformation sheet (1) through the wire groove (4).
4. A three-dimensional strain rosette sensor as claimed in claim 3, wherein: two first dividing grooves (6) are formed in the position, close to each vertex angle, of the deformation sheet (1), the two first dividing grooves (6) are respectively arranged on two edges of the deformation sheet (1), and the extending direction of the first dividing grooves (6) is perpendicular to the direction of the deformation sheet (1); each edge of the deformation sheet (1) is also provided with a second dividing groove (7) parallel to the extending direction of the first dividing groove (6), and the second dividing groove (7) is arranged on one side, far away from the close vertex, of the first dividing groove (6); the area between the first dividing groove (6) and the second dividing groove (7) is an elastic sheet (8).
5. The three-way strain rosette sensor of claim 4, wherein: the elastic sheet (8) is provided with a circular welding groove (5), and the welding groove (5) is arranged at the position of the wiring groove (3) of the deformation sheet.
6. A three-dimensional strain rosette sensor as claimed in claim 5, wherein: three circular positioning holes (9) are formed in three vertex angles of the deformation sheet (1), and the circle center of each positioning hole (9) at each vertex angle is located in the extending direction of the first dividing groove (6) at the vertex angle.
7. The three-way strain rosette sensor of claim 6, wherein: each vertex angle of the deformation sheet (1) is provided with three first strength reducing holes (10), and the three first strength reducing holes (10) are mutually communicated and distributed in a Y shape; one of the first strength reducing holes (10) extends towards the direction close to the centroid of the deformation sheet (1), and the other two first strength reducing holes (10) are respectively arranged on one of the two elastic sheets (8) at the same vertex angle.
8. The three-way strain rosette sensor of claim 7, wherein: the deformation sheet (1) is also provided with three second strength reducing holes (11), and the three second strength reducing holes (11) are respectively formed close to one of three vertex angles of the deformation sheet (1); the two ends of the second strength reducing hole (11) extend to the two elastic sheets (8) at the top corners of the second strength reducing hole (11), and the middle section of the second strength reducing hole (11) extends to the centroid close to the deformation sheet (1) to avoid the opening of the first strength reducing hole (10).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023021781.2U CN213778925U (en) | 2020-12-14 | 2020-12-14 | Three-dimensional strain sensor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202023021781.2U CN213778925U (en) | 2020-12-14 | 2020-12-14 | Three-dimensional strain sensor |
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| CN213778925U true CN213778925U (en) | 2021-07-23 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113776586A (en) * | 2021-09-04 | 2021-12-10 | 中北大学 | Thin film sensor, preparation method thereof and parameter detection method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113776586A (en) * | 2021-09-04 | 2021-12-10 | 中北大学 | Thin film sensor, preparation method thereof and parameter detection method |
| CN113776586B (en) * | 2021-09-04 | 2024-03-15 | 中北大学 | Thin film sensor, preparation method thereof and parameter detection method |
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