CN110411365A - A fiber grating mechanical performance tester with convex-concave matching disk fixture - Google Patents

Abstract

The invention discloses a kind of fiber grating measuring mechanical property instrument with male-female disk clamp, including pedestal, body, movable plate, the body is set on the base, the movable plate is arranged on body, the body side is provided with the driving handle for driving movable plate to move up and down along body, tensiometer is removably provided on the movable plate, the body side is provided with the shift scale for recording movable plate displacement, is removably provided with the fixture for fixed tested grating fibers on the tensiometer connecting pin and pedestal respectively.The present invention on measuring mechanical property instrument by setting dedicated fixture, tested grating fibers are effectively fixed by fixed arm, link block, rotate driving handle, driving handle and shift scale show the pulling force that tested grating fibers are subject to and length variation, and then it just can be derived that wavelength and the displacement of tested grating fibers by primary test, the relationship of wavelength and power, it is convenient to bring to detection work.

Description

A fiber grating mechanical performance tester with convex-concave matching disk fixture

technical field

The invention relates to the technical field of optical fiber grating mechanical performance testing equipment, in particular to an optical fiber grating mechanical performance testing instrument with convex-concave matching disk fixtures.

Background technique

The mechanical performance tester is a detection device used to detect the relationship between the change of the length of the object and the magnitude of the force. The object is fixed to the tester through the fixture, the tension is applied, and the force and length change of the measured object are recorded to obtain its mechanical properties. .

The change of the return wavelength of the fiber grating is directly proportional to the change of the length of the fiber grating, and also proportional to the tension of the fiber grating. In order to obtain the proportional relationship between the wavelength change and the length change of the fiber grating and the proportional relationship between the wavelength change and the tensile force change, the traditional method is to conduct two tests to record the two relationships between the wavelength change and the length change and the wavelength change and the tensile force change respectively. As mentioned in reference: K.Li, et al, "Fiber Bragg grating strain modulation based on nonlinear string transverse-force amplifier", Optics Letters, vol.38, no.3, pp.311-313, 2013.

If a mechanical performance tester is used, the above two relationships can be obtained at one time. However, because the fiber grating is thin and fragile, it cannot be fixed to the mechanical performance tester with conventional fixtures. This brings great inconvenience to the measurement work.

Contents of the invention

The object of the present invention is to provide a fiber grating mechanical property tester with convex-convex matching disk fixtures, so as to solve the problems raised in the above-mentioned background technology.

To achieve the above object, the present invention provides the following technical solutions:

A fiber grating mechanical performance tester with convex-convex matching disk fixtures, used for mechanical performance testing of grating optical fibers, including a base, a body, and a moving plate, the body is set on the base, and the moving plate is set on the body , the side of the body is provided with a driving handle for driving the moving plate to move up and down along the body; The connecting end of the meter and the base are respectively provided with detachable clamps for fixing the optical fiber of the grating under test.

Preferably, the clamp includes a connection base, a fixed disk, a fixed arm, a connecting rod, and a connection block, the fixed disk is arranged on the connection base, and the connection base is used to fix the clamp to the tension gauge and the base, The fixed disc is provided with a fixed seat, the fixed arm is arranged on the fixed seat through a rotating shaft, the fixed arm is provided with a connecting shaft, one end of the connecting rod is connected with the connecting shaft, and the other end is connected with a connecting block, A fixing block is arranged on the connecting block.

Preferably, the fixed block includes an arc structure adapted to the fixed disc.

Preferably, a groove for accommodating the grating optical fiber to be tested is provided on the side of the fixed disc, and a protrusion matching the groove is provided on the fixed block.

Compared with prior art, the beneficial effect of the present invention is:

In the present invention, a special fixture is provided on the mechanical performance tester, and the measured grating optical fiber is effectively fixed through the fixed arm and the connecting block, and the driving handle is rotated, and the driving handle and the displacement scale show the tension and length of the measured grating optical fiber. Changes, and then after a test, the relationship between the wavelength and displacement of the grating fiber under test, and the relationship between wavelength and force can be obtained, which improves the detection efficiency and brings convenience to the detection work.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is the structure schematic diagram of fixture of the present invention;

Fig. 3 is a top view of the clamp of the present invention.

In the figure: 1 base, 2 body, 3 moving plate, 4 tension gauge, 5 driving handle, 6 displacement scale, 7 fixture, 71 connection seat, 72 fixed disc, 721 groove, 73 fixed seat, 74 fixed arm, 75 Connecting shaft, 76 connecting rods, 77 connecting blocks, 78 fixed blocks, 781 projections.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Please refer to Fig. 1-3, the present invention provides a kind of technical scheme:

A fiber grating mechanical performance tester with convex-convex matching disk fixtures, used for mechanical performance testing of grating optical fibers, including a base 1, a body 2, and a moving plate 3, the body 2 is fixed on the base 1, and the moving plate 3 is movable It is arranged on the upper end of the body 2, and the side of the body 2 is provided with a driving handle 5 for driving the moving plate 3 to move up and down along the body 2. The tension gauge 4 is set on the moving plate 3 through bolts. The tension gauge 4 includes a digital display tension gauge for displaying The measured grating optical fiber is stressed. The side of the body 2 is provided with a displacement scale 6 for recording the displacement of the moving plate 3. The displacement scale 6 includes a digital display displacement scale for recording the displacement of the measured grating optical fiber during the test. 4. A clamp 7 for fixing the measured grating optical fiber is detachably provided on the connection end and the base 1 respectively.

The clamp 7 includes a connection seat 71, a fixed disc 72, a fixed arm 74, a connecting rod 76, and a connecting block 77. The fixed disc 72 is arranged on the connection seat 71, and the grating optical fiber that needs to be detected is wound on the fixed disc 72. The seat 71 is used to fix the clamp 7 to the tension gauge 4 and the base 1, the fixed disc 72 is provided with a fixed seat 73, the fixed arm 74 is arranged on the fixed seat 73 through a rotating shaft, and the fixed arm 74 is provided with a connecting shaft 75, One end of the connecting rod 76 is threadedly connected to the connecting shaft 75, and the other end is connected to the connecting block 77. By rotating the connecting rod 76, the length of the connecting rod 76 is adjusted, and then the force of the protrusion 781 to press the grating optical fiber is adjusted to ensure that it is No sliding will occur during the test, which will affect the test results. The connecting block 77 is provided with a fixed block 78, the fixed block 78 includes an arc structure compatible with the fixed disc 72, the side of the fixed disc 72 is provided with a groove 721 for accommodating the measured grating optical fiber, and the fixed block 78 is provided with The protrusion 781 adapted to the groove 721, the grating fiber to be tested is wound around the groove 721, and the protrusion 781 is pressed on the grating fiber.

Working principle: first fix the fixture 7 to the connecting end of the tension meter 4 and the base 1 respectively, then wrap the measured grating optical fiber into the groove 721 on the fixed disc 72, and hold it by the protrusion 781 , locked by the fixed arm 74, the pigtail at one end of the grating is connected to the fiber grating demodulator, finally, the handle 5 is shaken to drive the moving plate 3 and the tension meter 4 to move upward, and the optical fiber under test is subjected to a certain tension, and the tension meter 4 and The displacement scale 6 records the tensile force and the displacement generated by the measured grating fiber respectively, and the relationship between the measured wavelength and displacement, and the relationship between wavelength and force can be simultaneously obtained through the grating demodulator.

Although the embodiments of the present invention have been shown and described, those skilled in the art can understand that various changes, modifications and substitutions can be made to these embodiments without departing from the principle and spirit of the present invention. and modifications, the scope of the invention is defined by the appended claims and their equivalents.

Claims (4)

1. a kind of fiber grating measuring mechanical property instrument with male-female disk clamp, mechanical for carrying out to grating fibers Performance test, including pedestal (1), body (2), movable plate (3), the body (2) are arranged on pedestal (1), the movable plate (3) it is arranged on body (2), body (2) side is provided with for driving movable plate (3) to move up and down along body (2) Driving handle (5) is removably provided with tensiometer (4) on the movable plate (3), and body (2) side, which is provided with, to be used for Record the shift scale (6) of movable plate (3) displacement, it is characterised in that: on tensiometer (4) connecting pin and pedestal (1) respectively Removably it is provided with the fixture (7) for fixed tested grating fibers.

2. a kind of fiber grating measuring mechanical property instrument with male-female disk clamp according to claim 1, Be characterized in that: the fixture (7) includes attachment base (71), fixed disc (72), fixed arm (74), connecting rod (76), link block (77), the fixed disc (72) is arranged on attachment base (71), and the attachment base (71) is used to fixture (7) being fixed to pulling force It counts on (4) and pedestal (1), is provided with fixing seat (73) on the fixed disc (72), the fixed arm (74) is set by shaft It sets on fixing seat (73), is provided with connecting shaft (75) on the fixed arm (74), described connecting rod (76) one end and connecting shaft (75) it connects, the other end is connected with link block (77), is provided with fixed block (78) on the link block (77).

3. a kind of fiber grating measuring mechanical property instrument with male-female disk clamp according to claim 2, Be characterized in that: the fixed block (78) includes the arc structure being adapted with fixed disc (72).

4. a kind of fiber grating measuring mechanical property instrument with male-female disk clamp according to claim 3, It is characterized in that: offering the groove (721) for accommodating tested grating fibers, the fixed block on fixed disc (72) side (78) protrusion (781) being adapted with groove (721) is provided on.