阅读说明：本技术 用于定量评价光纤软硬度的测试装置及方法 (Testing device and method for quantitatively evaluating hardness of optical fiber ) 是由 张怡雪 丁凡 徐江河 夏祖明 陈奎 孙谦 谢利华 皮亚斌 于 2021-07-14 设计创作，主要内容包括：本发明提供一种用于定量评价光纤软硬度的测试装置及方法,包括测试平台,测试平台上设有悬挂测试架,悬挂测试架包括第一支撑架,第一支撑架上端设有悬挂杆,悬挂杆下方设有水平布置的第一测试尺,悬挂杆用于承托待测光纤的中部,第一测试尺用于测量待测光纤两端下垂段与悬挂杆之间的水平距离,测试装置无须使用复杂的硬度仪器,通过测试光纤受自重的弯曲量即可定量评价光纤轴向软硬度,测试结果直观,易于观察,且成本低,效率高。(The invention provides a testing device and a method for quantitatively evaluating the hardness of an optical fiber, and the testing device comprises a testing platform, wherein a suspension testing frame is arranged on the testing platform, the suspension testing frame comprises a first supporting frame, a suspension rod is arranged at the upper end of the first supporting frame, a first testing ruler which is horizontally arranged is arranged below the suspension rod, the suspension rod is used for supporting the middle part of the optical fiber to be tested, the first testing ruler is used for measuring the horizontal distance between the sagging sections at the two ends of the optical fiber to be tested and the suspension rod, the testing device does not need to use a complex hardness instrument, the axial hardness of the optical fiber can be quantitatively evaluated by testing the bending amount of the optical fiber under the dead weight, the testing result is visual, the observation is easy, the cost is low, and the efficiency is high.)

1. A testing arrangement for quantitative evaluation optic fibre softness and hardness, characterized by: including test platform (1), be equipped with on test platform (1) and hang test jig (2), it includes first support frame (201) to hang test jig (2), first support frame (201) upper end is equipped with hangs pole (204), it is equipped with first test ruler (202) that the level was arranged to hang pole (204) below, it is used for the bearing to hang pole (204) the middle part of awaiting measuring optic fibre (8), first test ruler (202) are used for measuring the horizontal distance between optic fibre (8) both ends pendent section and the pole of hanging (204) that awaits measuring.

2. The test apparatus for quantitatively evaluating the softness or hardness of an optical fiber according to claim 1, wherein: be equipped with windshield (4) on test platform (1), hang test jig (2) and establish inside windshield (4), windshield (4) front side is equipped with first window (402) and the optic fibre that can open and takes out and put door (401).

3. The test apparatus for quantitatively evaluating the softness or hardness of an optical fiber according to claim 2, wherein: the test platform (1) is arranged in the temperature and humidity control room (7), and a temperature and humidity meter (12) is further arranged in the windshield (4).

4. The test apparatus for quantitatively evaluating the softness or hardness of an optical fiber according to claim 3, wherein: the suspension test frame (2) is also provided with a second test ruler (203) which is made of different materials from the first test ruler (202), and the second test ruler (203) and the first test ruler (202) are arranged at the same height.

5. The test apparatus for quantitatively evaluating the softness or hardness of an optical fiber according to claim 2, wherein: still be equipped with second support frame (3) on test platform (1), second support frame (3) upper end is equipped with cable suspension device (5), cable suspension device (5) are including gallows (501) and first drive arrangement (504), first drive arrangement (504) drive gallows (501) up-and-down motion, gallows (501) lower extreme is equipped with two at least die-pins (502), die-pin (502) are used for holding optical fiber (8) both ends that await measuring, die-pin (502) one side is equipped with bolt cylinder (505), bolt cylinder (505) drive die-pin (502) slide.

6. The test apparatus for quantitatively evaluating the softness or hardness of an optical fiber according to claim 5, wherein: the centering device (6) is arranged on two sides of the hanging bracket (501), the centering device (6) comprises a centering block (601), one end of the centering block (601) is connected with a sliding rod (602), the sliding rod (602) is in sliding connection with the second supporting frame (3), one end of the sliding rod (602) is further provided with a second driving device (603), and the sliding rod (602) is driven by the second driving device (603) to slide left and right.

7. The test apparatus for quantitatively evaluating the softness or hardness of an optical fiber according to claim 6, wherein: at least four corners of the lower end of the test platform (1) are provided with second ground feet (10), and the test platform (1) is provided with a level meter (13);

the hanging device (5) further comprises a connecting plate (503), the first driving device (504) is connected with the connecting plate (503), the hanging bracket (501) is connected with the first driving device (504) in a sliding mode, at least four corners of the lower side of the connecting plate (503) are provided with second leveling devices (14), the hanging device (5) is connected with the second support frame (3) through the second leveling devices (14), and a second inclination angle sensor (15) is arranged on the hanging bracket (501) close to the supporting rod (502);

at least four corners of the lower end of the first support frame (201) are provided with first leveling devices (9), the suspension test frame (2) is connected with the test platform (1) through the first leveling devices (9), and the upper end of the first support frame (201) close to the suspension rod (204) is provided with a first inclination angle sensor (11);

the supporting rod (502) is also provided with a piezoelectric sensor (508), and the piezoelectric sensor (508) is in contact with the optical fiber (8) to be measured.

8. The test apparatus for quantitatively evaluating the softness or hardness of an optical fiber according to claim 7, wherein: the first leveling device (9) is identical to the second leveling device (14) in structure, the first leveling device (9) comprises a first ground foot (901), the first ground foot (901) is connected with the test platform (1), a connecting seat (902) is arranged at the upper end of the first ground foot (901), a guide groove (903) is formed in the upper end of the connecting seat (902), an ejector block (904) is arranged in the guide groove (903), the ejector block (904) slides up and down along the guide groove (903), a wedge-shaped block (905) is arranged between the ejector block (904) and the connecting seat (902), a driving motor (907) is further arranged, a screw rod (906) is arranged at one end of the driving motor (907), the screw rod (906) drives the guide groove (903) to slide laterally through the driving motor (907) so that the ejector block (904) slides up and down, and the ejector block (904) is connected with the first supporting frame (201).

9. A test method for quantitatively evaluating the softness or hardness of an optical fiber according to any one of claims 1 to 8, characterized in that:

s1, setting the temperature and humidity in the temperature and humidity control room (7), and waiting for a certain time to enable the temperature and humidity in the windshield (4) to meet the test requirements;

s2, taking the optical fiber (8) to be detected, placing the middle point of the optical fiber (8) to be detected on the suspension rod (204), and naturally dropping two ends of the optical fiber (8) to be detected;

s3, standing for a certain time to stabilize the optical fiber (8) to be tested, and reading the horizontal distance from the intersection point of the natural drooping sections at the two ends of the optical fiber (8) to be tested and the first test ruler (202) to the suspension rod (204).

10. The test device and method for quantitatively evaluating the softness or hardness of optical fibers according to claim 9, wherein: s2 also includes the specific steps of,

s21, adjusting each second anchor (10) at the lower end of the test platform (1), and observing the level meter (13) to enable the upper end face of the test platform (1) to be in a horizontal state;

s22, placing a level meter (13) on the upper end face of the first support frame (201), adjusting first ground feet (901) of each first leveling device (9) to level the upper end face of the first support frame (201), and adjusting a second leveling device (14) in the same way to enable a connecting plate (503) of the hanging device (5) to be in a horizontal state;

s23, starting the centering device (6), and centering and moving the two centering blocks (601) to a set position;

s24, taking the optical fiber (8) to be measured, and moving two end faces of the optical fiber (8) to be measured downwards along the side face of the centering block (601) until two ends of the optical fiber (8) to be measured are placed on the support rods (502) of the hanging bracket (501);

s25, monitoring pressure values of the support rods (502) at two ends of the optical fiber (8) to be tested through the piezoelectric sensor (508), and driving the centering block (601) to push the optical fiber (8) to be tested to move left and right through the second driving device (603) so as to enable the pressures of the two support rods (502) to be equal;

s26, standing the optical fiber (8) to be tested for a period of time, monitoring the horizontal state of the suspension test frame (2) and the hanging device (5) through the first inclination angle sensor (11) and the second inclination angle sensor (15), if the horizontal state changes, adjusting the height of each first leveling device (9) and each second leveling device (14) through electric control to enable the suspension test frame (2) and the hanging device (5) to return to the horizontal state, and repeating S25;

s27, the first driving device (504) drives the hanging bracket (501) to descend, the optical fiber (8) to be tested is placed on the hanging rod (204), and the hanging bracket (501) continues to descend until the supporting rod (502) is separated from the two ends of the optical fiber (8) to be tested;

and S28, driving the supporting rod (502) to retract through the bolt air cylinder (505), and lifting and resetting the hanger (501).

Technical Field

The invention relates to the field of optical fiber manufacturing, in particular to a testing device and a testing method for quantitatively evaluating the hardness of an optical fiber.

Background

The typical structure of an Optical Fiber (Optical Fiber) is a multilayer coaxial cylinder, and the Optical Fiber (Optical Fiber) consists of a Fiber core, a cladding and a coating layer from inside to outside, wherein the coating layer is also an inner coating layer and an outer coating layer, the inner coating layer is soft and has low modulus (several megapascals), the Optical Fiber is protected from mechanical damage and influences on the pull-out force, and the outer coating layer is hard and has high modulus (several thousands of megapascals), good wear resistance and determines the stripping force of the coating layer. In the manufacture of optical fibers, certain requirements are imposed on performance parameters such as viscosity, modulus, glass transition temperature, curing speed, refractive index, water absorption and the like of inner and outer coating layers. In particular, the modulus of the coating curing film has a certain correlation with the hardness of the optical fiber, and the properties of the coating affect the performance of the optical fiber material, and are finally embodied in the optical fiber winding and looping process. Therefore, the ring forming quality and the performance parameters of the optical fiber ring have reverse guiding significance on the optical fiber performance and the research and development of the optical fiber coating.

The measurement of the axial hardness is helpful for the research and development of the optical fiber, such as the selection of the materials and the structural thickness of the fiber core, the cladding and the coating layer, the selection of the corresponding processing technology, the selection, the research and development of the automatic processing equipment for winding the optical fiber ring and the processing technology, so that the measurement of the axial hardness has important guiding and feedback significance for the research and development of the optical fiber ring for the detection of the axial hardness of the optical fiber.

In addition, the optical fiber ring for the optical fiber gyroscope and the optical fiber hydrophone sensitive detection element are required to respectively wind the polarization maintaining optical fiber and the bending insensitive single-mode optical fiber in a ring mode, the winding process is mostly manual winding, and the axial hardness and the rigidity of the optical fiber relate to selection of the minimum bending radius of winding and selection of an adhesive and control parameters. At present, a test method for quantitatively evaluating the hardness of an optical fiber only characterizes the hardness of the optical fiber in the transverse and longitudinal directions, and can be used for measuring the hardness by using a Shore hardness tester and a Vickers hardness tester, a quantitative analysis method for the hardness of the optical fiber in the axial direction (length direction) of a certain length is not available temporarily, and the hardness of the optical fiber in the axial direction directly influences the difficulty of optical fiber winding and ring forming, so that the ring forming yield and the ring forming efficiency are influenced. In the prior art, the structure recorded in the in-situ modulus test method of the optical fiber outer coating layer is referred to in CN 111122321 a, the hardness of the optical fiber outer layer is mainly reflected by measuring the young's modulus of the coating layer, but the method is not very accurate for evaluating the overall hardness of the optical fiber, so that it is very important to find a suitable and reliable method for quantitatively evaluating the axial hardness of the optical fiber.

Disclosure of Invention

The invention provides a testing device and a method for quantitatively evaluating the hardness of an optical fiber, which solve the problem of quantitatively evaluating the axial hardness of the optical fiber.

In order to solve the technical problems, the technical scheme adopted by the invention is as follows: the utility model provides a testing arrangement for quantitative evaluation optic fibre softness and hardness, includes test platform, the last hanging test jig that is equipped with of test platform, and the hanging test jig includes first support frame, and first support frame upper end is equipped with hangs the pole, hangs the pole below and is equipped with the first test ruler that the level was arranged, hangs the middle part that the pole is used for the bearing optic fibre that awaits measuring, and first test ruler is used for measuring the optic fibre both ends pendent section and hangs the horizontal distance between the pole that awaits measuring.

In the preferred scheme, be equipped with the windshield on the test platform, hang the test and erect inside the windshield, the windshield front side is equipped with first window and the optic fibre that can open and gets and put the door.

In the preferred scheme, the test platform is arranged in a temperature and humidity control room, and a temperature and humidity meter is further arranged in the windshield.

In the preferred scheme, still be equipped with the second test chi different with first test chi material on the suspension test jig, the equal altitude of second test chi and first test chi is arranged.

In the preferred scheme, the test platform is further provided with a second support frame, a hanging device is arranged at the upper end of the second support frame and comprises a hanging frame and a first driving device, the first driving device drives the hanging frame to move up and down, at least two support rods are arranged at the lower end of the hanging frame and used for supporting two ends of the optical fiber to be tested, and a bolt cylinder is arranged on one side of each support rod and drives the support rods to slide.

In the preferred scheme, centering devices are arranged on two sides of the hanging bracket and comprise centering blocks, one end of each centering block is connected with a sliding rod, the sliding rods are connected with the second supporting frames in a sliding mode, a second driving device is further arranged at one end of each sliding rod, and the second driving devices drive the sliding rods to slide left and right.

In the preferred scheme, at least four corners of the lower end of the test platform are provided with second ground feet, and the test platform is provided with a level gauge;

the hanging device further comprises a connecting plate, the first driving device is connected with the connecting plate, the hanging bracket is connected with the first driving device in a sliding mode, at least four corners of the lower side of the connecting plate are provided with second leveling devices, the hanging device is connected with the second supporting frame through the second leveling devices, and a second inclination angle sensor is arranged on the hanging bracket close to the supporting rod;

at least four corners of the lower end of the first support frame are provided with first leveling devices, the suspension test frame is connected with the test platform through the first leveling devices, and the upper end of the first support frame, which is close to the suspension rod, is provided with a first inclination angle sensor;

the support rod is also provided with a piezoelectric sensor, and the piezoelectric sensor is contacted with the optical fiber to be detected.

In an optimized scheme, the first leveling device is the same as the second leveling device in structure and comprises a first ground foot, the first ground foot is connected with the test platform, a connecting seat is arranged at the upper end of the first ground foot, a guide groove is formed in the upper end of the connecting seat, a jacking block is arranged in the guide groove and slides up and down along the guide groove, a wedge-shaped block is arranged between the jacking block and the connecting seat, a driving motor is further arranged, a screw rod is arranged at one end of the driving motor, the screw rod drives the guide groove to slide laterally through the driving motor so that the jacking block slides up and down, and the jacking block is connected with the first supporting frame.

Comprises a testing method and a test program, wherein the testing method comprises the following steps of,

s1, setting the temperature and humidity in the temperature and humidity control room, and waiting for a certain time to enable the temperature and humidity in the windshield to meet the test requirements;

s2, taking the optical fiber to be detected, placing the middle point of the optical fiber to be detected on the suspension rod, and naturally dropping two ends of the optical fiber to be detected;

s3, standing for a certain time to stabilize the optical fiber to be tested, and reading the horizontal distance from the intersection point of the natural drooping sections at the two ends of the optical fiber to be tested and the first test ruler to the suspension rod.

In a preferred embodiment, S2 further comprises the following steps,

s21, adjusting each second ground foot at the lower end of the test platform, and observing the level meter to enable the upper end face of the test platform to be in a horizontal state;

s22, placing a level gauge on the upper end face of the first support frame, adjusting the first ground feet of each first leveling device to enable the upper end face of the first support frame to be horizontal, and adjusting the second leveling devices in the same way to enable the connecting plate of the hanging device to be in a horizontal state;

s23, starting the centering device, and centering and moving the two centering blocks to a set position;

s24, taking the optical fiber to be measured, and moving two end faces of the optical fiber to be measured downwards along the side face of the centering block until two ends of the optical fiber to be measured are placed on the support rods of the hanging bracket;

s25, monitoring pressure values of the support rods at two ends of the optical fiber to be detected through the piezoelectric sensor, and driving the centering block to push the optical fiber to be detected to move left and right through the second driving device so as to enable the pressure values of the two support rods to be equal;

s26, standing the optical fiber to be tested for a period of time, monitoring the horizontal states of the suspension test frame and the suspension device through the first inclination angle sensor and the second inclination angle sensor, if the horizontal state changes, adjusting the heights of the first leveling device and the second leveling device through electric control to enable the suspension test frame and the suspension device to return to the horizontal state, and repeating S25;

s27, driving the hanging bracket to descend through the first driving device, placing the optical fiber to be detected on the hanging rod, and continuing descending the hanging bracket until the support rod is separated from the two ends of the optical fiber to be detected;

and S28, driving the support rod to retract through the bolt cylinder, and lifting and resetting the hanger.

The invention has the beneficial effects that: the testing device does not need to use a complex hardness instrument, can quantitatively evaluate the axial hardness of the optical fiber by testing the bending amount of the optical fiber under the dead weight, has visual testing result, is easy to observe, and has low cost and high efficiency; the test platform is arranged in the temperature and humidity control room, and can be close to an actual use environment according to the temperature and humidity control test, so that the result is more accurate; the wind shield is arranged to prevent the airflow from disturbing the optical fiber and disturbing the test result; by the matched use of a plurality of monitoring devices such as the ground feet, the automatic leveling device, the inclination angle sensor and the like, the suspension test frame, the hanging device and the like are ensured to be in a horizontal state, the system error of the test device is reduced, and the test accuracy is further improved; the test principle is close to the winding application scene of the optical fiber, and the actual production quality of the optical fiber ring can be effectively improved by quantitatively evaluating the circumferential hardness of the optical fiber.

Drawings

The invention is further illustrated by the following figures and examples.

Fig. 1 is a schematic layout of the present invention.

Fig. 2 is a schematic front view of the present invention.

Fig. 3 is a side view structural view of the present invention.

FIG. 4 is a schematic view of a hanging test stand of the present invention.

FIG. 5 is a schematic view of the hanger of the present invention.

FIG. 6 is a schematic view of the hanging test rack of the present invention in combination with a hanger.

Figure 7 is a schematic view of the centering device of the present invention.

FIG. 8 is a schematic view of a first leveling device of the present invention.

In the figure: a test platform 1; a vibration isolation groove 101; hanging a test frame 2; a first support frame 201; a first test ruler 202; a second test ruler 203; a suspension rod 204; a first adjustment mother 205; a second support frame 3; a windshield 4; an optical fiber pick-and-place door 401; a first window 402; a second window 403; a hanging device 5; a hanger 501; a support rod 502; a connecting plate 503; a first drive 504; a latch cylinder 505; a connection block 506; a guide rod 507; a piezoelectric sensor 508; a second adjustment mother 509; a centering device 6; a centering block 601; a slide bar 602; a second driving means 603; a temperature and humidity control room 7; an optical fiber 8 to be tested; a first leveling device 9; a first ground leg 901; a connecting base 902; a guide groove 903; a top block 904; a wedge block 905; a screw 906; a drive motor 907; a vibration isolator 908; a second foothold 10; a first tilt sensor 11; a thermo-hygrometer 12; a level meter 13; a second leveling device 14; a second tilt sensor 15.

Detailed Description

Example 1:

as shown in fig. 1-8, a testing apparatus for quantitatively evaluating the softness and hardness of an optical fiber comprises a testing platform 1, a suspension testing jig 2 is arranged on the testing platform 1, the suspension testing jig 2 comprises a first supporting frame 201, a suspension rod 204 is arranged at the upper end of the first supporting frame 201, a first testing ruler 202 horizontally arranged is arranged below the suspension rod 204, the suspension rod 204 is used for supporting the middle part of the optical fiber 8 to be tested, two first adjusting nuts 205 are arranged on the suspension rod 204 and used for clamping the optical fiber 8 to be tested and preventing the optical fiber 8 from deflecting, the first adjusting nuts 205 are in threaded connection with the suspension rod 204, the distance between the two first adjusting nuts 205 is adjustable and used for adapting to the optical fibers 8 to be tested with different diameters, the first testing ruler 202 is used for measuring the horizontal distance between the drooping sections at the two ends of the optical fiber 8 to be tested and the suspension rod 204, the distance between the suspension rod 204 and the first testing ruler 202 is determined according to the testing requirements, the middle of the first testing ruler 202 is zero scale, in the observation direction, the zero scale is positioned under the suspension rod 204, the left scale and the right scale are symmetrically arranged about the connecting line of the suspension rod 204 and the zero scale, so that whether the drooping amounts of the two ends of the optical fiber are equal or not can be observed conveniently, and because the distance between the suspension rod 204 and the first test ruler 202 is the same when different optical fibers are tested, the axial hardness of the optical fiber can be measured by comparing the distance between the drooping two ends of different optical fibers 8 to be tested and the intersection point of the first test ruler 202, and the harder the axial hardness of the optical fiber is, the larger the distance between the intersection points is, the softer the smaller the distance is.

In the preferred scheme, be equipped with windshield 4 on test platform 1, hang test jig 2 and establish inside windshield 4, prevent outside air current disturbance optic fibre, cause optic fibre to rock, the optic fibre that windshield 4 front side was equipped with first window 402 and can open gets puts door 401, and first window 402 is transparent material, is convenient for observe the test result.

In the preferred scheme, the test platform 1 is arranged in a temperature and humidity control room 7, the temperature and humidity meter 12 is further arranged in the windshield 4, the temperature and the humidity can be set to be consistent with the actual application scene of the optical fiber, the test is more accurate, meanwhile, the change of the hardness of the optical fiber under the extreme temperature and humidity condition can be tested, and the instructive suggestion is provided for the actual application environment of the optical fiber.

In a preferred scheme, a second test ruler 203 which is made of a material different from that of the first test ruler 202 is further arranged on the suspension test frame 2, and the second test ruler 203 and the first test ruler 202 are arranged at the same height.

The first test ruler 202 can be made of the same glass material as the optical fiber, the second test ruler 203 can be made of aluminum or steel, when the axial hardness and softness of the optical fiber at different temperatures are tested, the first test ruler 202 and the optical fiber can generate thermal expansion due to temperature change, the optical fiber 8 to be tested can be favorably extended to L1, the first test ruler 202 is extended to L2, the actually read optical fiber 8 to be tested is extended to L1-L2, the distance between the two drooping ends of the optical fiber 8 to be tested and the intersection point of the first test ruler 202 cannot be accurately measured, at the moment, the second test ruler 203 is introduced, the thermal expansion elongation is different from that of the first test ruler 202 due to the fact that the material of the second test ruler 202 is different from that of the first test ruler 202, and the relation of the expansion rates of the first test ruler 202 and the second test ruler 203 is known, so that the relation can be used for calculating the original length of the first test ruler 202 at normal temperature, and the influence of the temperature expansion on the first test ruler 202 can be shielded, the rear side of the windshield 4 is provided with a transparent second window 403 to facilitate viewing of the reading of the second test ruler 203 from the other side.

In a preferable scheme, the test platform 1 is further provided with a second support frame 3, the upper end of the second support frame 3 is provided with a hanging device 5, the hanging device 5 comprises a hanging frame 501 and a first driving device 504, the first driving device 504 drives the hanging frame 501 to move up and down, the lower end of the hanging frame 501 is provided with at least two support rods 502, the distance between the two support rods 502 and the hanging rod 204 is equal, the support rods 502 are used for supporting two ends of the optical fiber 8 to be tested, each support rod 502 is in threaded connection with two second adjusting nuts 509, the distance between the two second adjusting nuts 509 can be adjusted to adapt to the optical fibers 8 to be tested with different diameters, one side of each support rod 502 is provided with a plug pin cylinder 505, the extending end of the plug pin cylinder 505 is provided with a connecting block 506, the connecting block 506 is provided with a guide rod 507, the guide rod 507 is in sliding connection with the hanging frame 501 to prevent the support rods 502 from rotating, and the plug pin cylinder 505 drives the support rods 502 to slide.

In the preferred scheme, centering devices 6 are arranged on two sides of the hanger 501, each centering device 6 comprises a centering block 601, each centering block 601 is provided with a chamfer for guiding, the distance between each centering block 601 and the suspension rod 204 is equal, the two centering blocks 601 move in a centering manner until the distance is equal to the length of the optical fiber 8 to be measured, when the optical fiber 8 to be measured is placed down along the two centering blocks 601 at the moment, the middle point is just aligned with the suspension rod 204, one end of each centering block 601 is connected with a sliding rod 602, the sliding rod 602 is slidably connected with the second support frame 3, one end of the sliding rod 602 is further provided with a second driving device 603, the second driving device 603 drives the sliding rod 602 to drive the centering blocks 601 to slide left and right, and the left and right positions of the optical fiber 8 to be measured can be adjusted.

In the preferred scheme, at least four corners of the lower end of the test platform 1 are provided with second ground feet 10, the test platform 1 is provided with a detachable level meter 13, the levelness of the test platform 1 can be conveniently adjusted manually, and the level meter 13 can be placed at other positions for use;

the hanging device 5 further comprises a connecting plate 503, a first driving device 504 is connected with the connecting plate 503, the hanging bracket 501 is connected with the first driving device 504 in a sliding mode, at least four corners of the lower side of the connecting plate 503 are provided with second leveling devices 14, the hanging device 5 is connected with a second supporting frame 3 through the second leveling devices 14, a second inclination angle sensor 15 is arranged on the hanging bracket 501 close to the supporting rod 502, and the horizontal state of the hanging bracket 501 is dynamically monitored;

at least four corners of the lower end of the first support frame 201 are provided with first leveling devices 9, the suspension test frame 2 is connected with the test platform 1 through the first leveling devices 9, the upper end of the first support frame 201 close to the suspension rod 204 is provided with a first inclination angle sensor 11, and the horizontal state of the suspension test frame 2 is dynamically monitored;

the support rods 502 are further provided with piezoelectric sensors 508, the piezoelectric sensors 508 are in contact with the optical fiber 8 to be detected, the pressure state of the support rods 502 is detected, when the second tilt sensor 15 displays that the hanger 501 is horizontal, if the two support rods 502 are equally stressed, the distances between the two support rods 502 and the middle point of the optical fiber 8 to be detected are equal, and the middle point of the optical fiber 8 to be detected is ensured to be in contact with the suspension rod 204 when placed.

In a preferable scheme, the first leveling device 9 and the second leveling device 14 have the same structure, the first leveling device 9 includes a first foot leg 901, the first foot leg 901 is connected with the test platform 1, a connecting seat 902 is arranged at the upper end of the first foot leg 901, a guide groove 903 is arranged at the upper end of the connecting seat 902, a top block 904 is arranged in the guide groove 903, the top block 904 slides up and down along the guide groove 903, a wedge-shaped block 905 is arranged between the top block 904 and the connecting seat 902, a driving motor 907 is further arranged, a screw 906 is arranged at one end of the driving motor 907, the screw 906 drives the guide groove 903 to slide laterally through the driving motor 907 so that the top block 904 slides up and down, and the top block 904 is connected with the first support frame 201.

Before testing, each first foot 901 and each second foot 10 are manually adjusted to enable devices such as a testing platform 1, a second supporting frame 3 and a suspension testing frame 2 to be in a horizontal state, so that errors caused by inclination testing are prevented, but due to repeated use of the testing device, the horizontal state can be changed when a mechanism moves and collision vibration among the devices occurs during testing, so that the horizontal state is dynamically monitored by adopting a first inclination angle sensor 11 and a second inclination angle sensor 15, timely adjustment is carried out through a driving device, the system errors are guaranteed to be as small as possible, in addition, a plurality of vibration isolation grooves 101 are further arranged on the testing platform 1, vibration isolation pads 908 are arranged at the bottom end of a first leveling device 9, and the influence of vibration generated during mechanism movement on the suspension testing frame 2 is reduced.

The test method was as follows,

s1, setting the temperature and humidity in the temperature and humidity control room 7, and waiting for a certain time to enable the temperature and humidity in the windshield 4 to meet the test requirements;

s2, taking the optical fiber 8 to be detected, placing the middle point of the optical fiber 8 to be detected on the suspension rod 204, and naturally dropping two ends of the optical fiber 8 to be detected;

s3, standing for a certain time to stabilize the optical fiber 8 to be tested, and reading the horizontal distance from the intersection point of the natural drooping sections at the two ends of the optical fiber 8 to be tested and the first test ruler 202 to the suspension rod 204.

The intersection point distance measured by different optical fibers 8 to be measured is recorded, the larger the intersection point distance is, the harder the axial hardness of the optical fibers is, the larger the diameter of the optical fiber ring which can be used for production is, the corresponding diameter value of the optical fiber ring which is suitable for production is obtained according to the quantitative values of the measured intersection point distances of the different optical fibers, the production guidance effect is achieved, for example, the hardness query table is made by corresponding the diameter of the optical fiber ring and the measured intersection point horizontal distance value one by one, and an engineer is helped to quickly select the type.

In a preferred embodiment, S2 further comprises the following steps,

s21, adjusting each second anchor 10 at the lower end of the test platform 1, and observing the level meter 13 to enable the upper end face of the test platform 1 to be in a horizontal state;

s22, placing the level meter 13 on the upper end face of the first support frame 201, adjusting the first feet 901 of each first leveling device 9 to level the upper end face of the first support frame 201, and adjusting the second leveling devices 14 in the same way to enable the connecting plate 503 of the hanging device 5 to be in a horizontal state;

s23, starting the centering device 6, and centering and moving the two centering blocks 601 to set positions;

s24, taking the optical fiber 8 to be measured, and moving the two end faces of the optical fiber 8 to be measured downwards along the side face of the centering block 601 until the two ends of the optical fiber 8 to be measured are placed on the support rods 502 of the hanging bracket 501;

s25, monitoring pressure values of the support rods 502 at two ends of the optical fiber 8 to be tested through the piezoelectric sensor 508, and driving the centering block 601 to push the optical fiber 8 to be tested to move left and right through the second driving device 603 so as to enable the pressures of the two support rods 502 to be equal;

s26, standing the optical fiber 8 to be tested for a period of time, monitoring the horizontal state of the suspension test frame 2 and the hanging device 5 through the first inclination angle sensor 11 and the second inclination angle sensor 15, if the horizontal state changes, adjusting the height of each first leveling device 9 and each second leveling device 14 through electric control to enable the suspension test frame 2 and the hanging device 5 to return to the horizontal state, and repeating S25;

s27, the first driving device 504 drives the hanging bracket 501 to descend, the optical fiber 8 to be tested is placed on the hanging rod 204, and the hanging bracket 501 continues to descend until the supporting rod 502 is separated from the two ends of the optical fiber 8 to be tested;

s28, the latch cylinder 505 drives the supporting rod 502 to retract, and the hanger 501 rises and resets.

Example 2:

there are three groups of fiber samples to be tested, which are respectively marked as: the outer diameters of the bare optical fibers of the three groups of samples 1, 2 and 3 are all 80 micrometers, the diameter of the outer coating is 135 micrometers, but the types of the inner coating and the outer coating of the optical fiber are different, the modulus and the hardness are different, and the known hardness properties of the optical fiber to be measured, namely the hardness is sorted: sample 3> sample 2> sample 1.

A 2 meter long fiber sample 1, sample 2 and sample 3 were taken on different fiber optic disks, respectively.

And hanging the midpoint position of the optical fiber to be measured on the hanging rod, and naturally relaxing and drooping under the action of gravity.

Standing for 5min, reading the scale, repeating the operation for three times to obtain an average value, and obtaining the following result,

the modulus of the sample 1 is 1100Mpa, and the corresponding measured horizontal distance of the intersection point is 79.7 mm;

the modulus of the sample 2 is 1500Mpa, and the corresponding measured horizontal distance of the intersection point is 82.5 mm;

the modulus of the sample 3 is 2100Mpa, and the corresponding measured horizontal distance of the intersection point is 85.1 mm;

the hardness magnitude ordering can therefore be judged from the results: sample 3> sample 2> sample 1, the test structure is in accordance with a known hardness profile.

The above-described embodiments are merely preferred embodiments of the present invention, and should not be construed as limiting the present invention, and the scope of the present invention is defined by the claims, and equivalents including technical features described in the claims. I.e., equivalent alterations and modifications within the scope hereof, are also intended to be within the scope of the invention.