Tensile strength testing device for fiber bragg grating

Abstract

A tensile strength testing device for a fiber bragg grating comprises a first fiber winding jig, a second fiber winding jig, a third fiber bragg grating, a fourth fiber bragg grating and a fourth fiber bragg grating, the other end of the fiber bragg grating is fixed on the second fiber winding jig; the first fiber winding jig is arranged on the upper surface of the fixing table; the second fiber winding jig is arranged on the upper surface of the fixing base, the first fixing base and the second fixing base are oppositely arranged front and back, and the first fiber winding jig and the second fiber winding jig are oppositely arranged front and back and located on the same horizontal line; the fixed seat is arranged on the upper surface of the movable table and can move back and forth on the movable table; an adjustable displacement table; provided is a digital display tension meter. The tensile strength testing device for the fiber bragg grating is reasonable in structural design, convenient to construct, low in cost, easy to maintain and convenient to construct and test in different occasions at any time, and various accessories can be flexibly selected and replaced.

Description

Technical Field

[0001] The utility model relates to the technical field of optical fiber grating testing, in particular to an optical fiber grating tensile strength testing device. Background Art

[0002] Fiber Bragg grating is very suitable for use as a sensor and has many advantages. It can be used to measure and monitor various physical quantities, such as temperature, pressure, strain, etc., and has the characteristics of high sensitivity, high resolution and fast response.

[0003] In practical applications, the tensile strength of fiber Bragg grating is an important consideration. Different application scenarios require different tensile strengths. At present, tensile strength can only be tested by optical fiber manufacturers or requires the purchase of professional equipment for testing. Due to the low utilization rate of equipment and the fact that these test equipment are usually large-volume professional equipment, they are inconvenient to move, have limited use occasions, and are expensive, which brings inconvenience and cost pressure.

[0004] Therefore, the purpose of the utility model is to provide a fiber Bragg grating tensile strength testing device with a simple structure, which is easy to build, has flexible accessories that can be selected and replaced, is low-cost, easy to maintain, and is convenient for testing at any time and in different occasions. Utility Model Content

[0005] Purpose of the utility model: In order to overcome the above-mentioned shortcomings, the purpose of the utility model is to provide a fiber Bragg grating tensile strength testing device, which has a simple structure, is easy to build, and the various accessories can be flexibly selected and replaced. It is low cost, easy to maintain, and has simple test operation. It is convenient to test at any time in different occasions and has broad application prospects.

[0006] Technical solution: A fiber Bragg grating tensile strength test device, comprising:

[0007] A fiber winding jig, on which one end of the fiber Bragg grating is fixed;

[0008] A second fiber winding jig, on which the other end of the fiber Bragg grating is fixed;

[0009] A fixed platform, wherein the fiber winding jig is arranged on the upper surface of the fixed platform;

[0010] A fixed seat, wherein the second fiber winding jig is arranged on the upper surface of the fixed seat, the fixed platform is arranged front and back opposite to the fixed seat, and the first fiber winding jig and the second fiber winding jig are arranged front and back opposite to each other and are located on the same horizontal line;

[0011] A moving platform, wherein the fixing seat is arranged on the upper surface of the moving platform and can move forward and backward on the moving platform;

[0012] An adjustable displacement stage, wherein the movable stage and the adjustable displacement stage are arranged front and back relative to each other;

[0013] A digital tensile gauge is arranged on the upper surface of an adjustable displacement platform and can move forward and backward on the adjustable displacement platform. A tensile hook of the digital tensile gauge is connected to a fixing seat.

[0014] The fiber Bragg grating tensile strength testing device described in the utility model has a simple structure and is easy to operate. One end of the fiber Bragg grating is fixed on a first fiber winding jig and the other end is fixed on a second fiber winding jig. The second fiber winding jig is fixed on a fixed seat, that is, the second fiber winding jig can move forward and backward on a movable table. During the test, the tension hook of the digital display tensile gauge is fixed on the fixed seat, and then the adjustable displacement table is adjusted to stretch backward until the fiber Bragg grating is broken. At this time, the data of the digital display tensile gauge is read, and the moving distance of the adjustable displacement table is observed to obtain the tensile strength of the fiber Bragg grating.

[0015] Furthermore, in the above-mentioned fiber Bragg grating tensile strength testing device, the center positions of the first fiber winding jig and the second fiber winding jig are both provided with through mounting holes, and the fixing platform and the fixing seat are provided with mounting columns matching the mounting holes.

[0016] The fiber Bragg grating tensile strength testing device is easy to build, and accessories such as the fiber winding jig, the fiber winding jig, the fixing table, and the fixing seat can be flexibly selected and replaced. It is low-cost and easy to maintain, and is suitable for construction and testing at any time in different occasions.

[0017] Furthermore, in the above-mentioned fiber Bragg grating tensile strength testing device, the fiber winding fixture 1 and the fiber winding fixture 2 have the same structure, and both include:

[0018] Upper fiber winding disc;

[0019] A lower fiber winding disk, wherein the upper fiber winding disk and the lower fiber winding disk are arranged vertically and oppositely;

[0020] A disc column is arranged between the upper fiber winding disc and the lower fiber winding disc, and a fiber winding groove is formed between the disc column and the upper fiber winding disc and the lower fiber winding disc.

[0021] Furthermore, in the above-mentioned fiber Bragg grating tensile strength testing device, a fiber guiding groove is provided on the upper fiber winding disk.

[0022] Furthermore, the above-mentioned fiber Bragg grating tensile strength testing device further includes:

[0023] A magnet pressing block is arranged on the upper surface of the upper fiber winding disk and located on one side of the fiber guide groove, and the optical fiber Bragg grating is pressed tightly by the magnet pressing block.

[0024] The fiber grating is coiled 3-4 times in the winding groove, and then its tail is led out from the fiber guide groove. The fiber grating is pressed by a magnet block. The pressure of the magnet block and the friction of the winding groove can ensure that the fiber grating does not slip and rebound when stretched.

[0025] Furthermore, in the above-mentioned fiber Bragg grating tensile strength testing device, the moving platform is a dovetail groove moving platform.

[0026] Preferably, the movable stroke of the dovetail groove movable stage is 200 mm, the stepping amount is 1 mm, the stroke of the adjustable displacement stage is 180 mm, and the measuring range of the digital dynamometer is 100 N.

[0027] The beneficial effects of the utility model are as follows: the fiber grating tensile strength testing device described in the utility model has a reasonable structural design, is easy to build, various accessories can be flexibly selected and replaced, the cost is low, and it is easy to maintain. It is convenient to build and test at any time in different occasions, and has broad application prospects; the two ends of the fiber grating are fixed by the energy-saving fiber winding fixture one and the fiber winding fixture two, the fiber grating is coiled in the winding groove, and then its tail is led out from the fiber guide groove, and the fiber grating is pressed by the magnet pressing block. The pressure of the magnet pressing block and the friction of the fiber winding groove are used to ensure that the fiber grating does not slip and rebound when stretched. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is an overall top view of the fiber Bragg grating tensile strength testing device of the utility model;

[0029] Figure 2 The structure diagram of the fiber winding fixture 1 and the fiber winding fixture 2 of the fiber Bragg grating tensile strength test device of the utility model is shown in FIG. Figure 1 ;

[0030] Figure 3 The structure diagram of the fiber winding fixture 1 and the fiber winding fixture 2 of the fiber Bragg grating tensile strength test device of the utility model is shown in FIG. Figure 2 ;

[0031] In the figure: a fiber winding jig 1, an upper fiber winding disc 11, a fiber guide groove 111, a lower fiber winding disc 12, a disc column 13, a fiber winding groove 14, a magnet pressing block 15, a fiber winding jig 2, a mounting hole 21, a fixed platform 3, a mounting column 31, a fixed seat 4, a moving platform 5, an adjustable displacement platform 6, a digital display tensile gauge 7, a tensile hook 71, and a fiber grating. DETAILED DESCRIPTION

[0032] The following is combined with Figure 1-3 And embodiments 1-2 further illustrate the utility model.

[0033] Example 1

[0034] like Figure 1As shown, the fiber Bragg grating tensile strength test device described in the utility model is composed of a fiber winding jig 1, a fiber winding jig 2, a fixed platform 3, a mounting column 31, a fixed seat 4, a movable platform 5, an adjustable displacement platform 6, and a digital display tensile gauge 7. Among them, the fixed platform 3, the movable platform 5, and the adjustable displacement platform 6 are relatively arranged from front to back, the fiber winding jig 1 is arranged on the upper surface of the fixed platform 3, the fiber winding jig 2 is arranged on the upper surface of the fixed seat 4, and the digital display tensile gauge 7 is arranged on the upper surface of the adjustable displacement platform 6. The fiber winding jig 1, the fiber winding jig 2, and the digital display tensile gauge 7 are relatively arranged from front to back.

[0035] The working method of the fiber Bragg grating tensile strength testing device is as follows: one end of the fiber Bragg grating a is fixed on the fiber winding jig 1 and the other end is fixed on the fiber winding jig 2, and the fiber winding jig 2 is fixed on the fixed seat 3, that is, the fiber winding jig 2 can move forward and backward on the movable platform 5. During the test, the tension hook 71 of the digital display tensile gauge 7 is fixed on the fixed seat 3, and then the adjustable displacement stage 6 is adjusted to stretch backward until the fiber Bragg grating a is broken. At this time, the data of the digital display tensile gauge 7 is read, and the moving distance of the adjustable displacement stage 6 is observed to obtain the tensile strength of the fiber Bragg grating a. The operation is simple.

[0036] Example 2

[0037] Based on the structural basis of Example 1 above, Figure 1 , 2 , as shown in Figure 3.

[0038] The fiber Bragg grating tensile strength test device described in the utility model has a through mounting hole 21 at the center of the fiber winding jig 1 and the fiber winding jig 2, and a mounting column 31 matching the mounting hole 21 is provided on the fixing platform 3 and the fixing seat 4. The fiber Bragg grating tensile strength test device described in the utility model is easy to build, and accessories such as the fiber winding jig 1, the fiber winding jig 2, the fixing platform 3, the fixing seat 4 can be flexibly selected and replaced, with low cost and easy maintenance, and is suitable for construction and testing at any time in different occasions.

[0039] Furthermore, the fiber winding jig 1 and the fiber winding jig 2 have the same structure, both of which include a fiber winding disc 11, a lower fiber winding disc 12, a disc column 13, a fiber winding groove 14, and a magnet pressing block 15. A fiber winding groove 14 is formed between the disc column 13 and the upper and lower fiber winding discs 11 and 12. A fiber guide groove 111 is provided on the upper fiber winding disc 11. The optical fiber grating a is wound 3-4 times in the winding groove 14, and then its tail is led out from the fiber guide groove 111. A magnet pressing block 15 is provided on the upper surface of the upper fiber winding disc 11. The optical fiber grating a is pressed by the magnet pressing block 15. The pressure of the magnet pressing block 15 and the friction of the fiber winding groove 14 can ensure that the optical fiber grating a does not slip and rebound when stretched.

[0040] The above is only a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements without departing from the principle of the present invention, and these improvements should also be regarded as within the protection scope of the present invention.

Claims

1. A fiber Bragg grating tensile strength testing device, characterized in that: include: A fiber winding jig (1), one end of the optical fiber Bragg grating being fixed on the fiber winding jig (1); A second fiber winding jig (2), on which the other end of the fiber Bragg grating is fixed; A fixed platform (3), wherein the fiber winding jig (1) is arranged on the upper surface of the fixed platform (3); A fixed seat (4), the second fiber winding jig (2) is arranged on the upper surface of the fixed seat (4), the fixed platform (3) and the fixed seat (4) are arranged front and back oppositely, and the first fiber winding jig (1) and the second fiber winding jig (2) are arranged front and back oppositely and are located on the same horizontal line; A moving platform (5), wherein the fixing seat (4) is arranged on the upper surface of the moving platform (5) and can move forward and backward on the moving platform (5); An adjustable displacement platform (6), wherein the movable platform (5) and the adjustable displacement platform (6) are arranged relative to each other in a front-to-back manner; A digital tensile gauge (7) is arranged on the upper surface of the adjustable displacement platform (6) and can move forward and backward on the adjustable displacement platform (6); a tensile hook (71) of the digital tensile gauge (7) is connected to the fixing seat (4).

2. The fiber Bragg grating tensile strength testing device according to claim 1, characterized in that: A through mounting hole (21) is provided at the center of the first fiber winding jig (1) and the second fiber winding jig (2), and a mounting column (31) matching the mounting hole (21) is provided on the fixing platform (3) and the fixing seat (4).

3. The fiber Bragg grating tensile strength testing device according to claim 1, characterized in that: The fiber winding jig 1 (1) and the fiber winding jig 2 (2) have the same structure, and both include: Upper fiber winding disc (11); A lower fiber winding disk (12), wherein the upper fiber winding disk (11) and the lower fiber winding disk (12) are arranged vertically opposite to each other; A disk column (13), wherein the disk column (13) is arranged between an upper fiber winding disk (11) and a lower fiber winding disk (12), and a fiber winding groove (14) is formed between the disk column (13) and the upper fiber winding disk (11) and the lower fiber winding disk (12).

4. The fiber Bragg grating tensile strength testing device according to claim 3, characterized in that: The upper fiber winding disc (11) is provided with a fiber guiding groove (111).

5. The fiber Bragg grating tensile strength testing device according to claim 4, characterized in that: Also includes: A magnet pressing block (15) is arranged on the upper surface of the upper fiber winding disk (11) and is located on one side of the fiber guide groove (111), and the optical fiber Bragg grating is pressed tightly by the magnet pressing block (15).

6. The fiber Bragg grating tensile strength testing device according to claim 1, characterized in that: The moving platform (5) is a dovetail groove moving platform.

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