Test device

Abstract

This application discloses a testing apparatus, comprising a base, a clamping mechanism, a photodetector, an optical power meter, and an optical fiber collimator. The clamping mechanism is supported by the base and is used to fix the optical fiber. The photodetector is supported by the base and is capable of receiving optical signals from the optical fiber. The optical power meter is supported by the base and is electrically connected to the photodetector. The optical fiber collimator is supported by the base. The clamping mechanism includes a first clamp, a second clamp, a rotating component, and a moving component. Both the first and second clamps are supported by the base and are used to fix the optical fiber. The rotating component is connected to at least one of the first and second clamps and drives at least one of the first and second clamps to rotate, thereby twisting the optical fiber. The moving component is connected to and drives at least one of the clamps to move, thereby adjusting the spacing between the first and second clamps. With the above configuration, the optical transmission performance of the optical fiber under different torsional conditions can be measured.

Description

Technical Field

[0001] This application relates to the field of optical fiber testing technology, and in particular to a testing device. Background Technology

[0002] Optical fiber is a tool that uses the principle of total internal reflection to transmit optical signals through fibers made of glass or plastic.

[0003] Existing optical fibers can twist during use, and when twisted, they are subjected to various forces such as shear stress, tensile stress, and bending stress. These forces can cause optical signal leakage in the fiber core, thus affecting the optical transmission performance of the fiber. However, existing optical fiber testing equipment cannot measure the optical transmission performance of optical fibers under different torsion conditions. Utility Model Content

[0004] In order to overcome the shortcomings of the prior art, the purpose of this application is to provide a testing device that can test the optical transmission performance of optical fiber under different torsion conditions.

[0005] To achieve the above objectives, this application adopts the following technical solution:

[0006] A testing apparatus includes a base, a clamping mechanism, a photodetector, an optical power meter, and an optical fiber collimator. The clamping mechanism is supported by the base and is used to fix the optical fiber. The photodetector is supported by the base and is capable of receiving optical signals from the optical fiber. The optical power meter is supported by the base and is electrically connected to the photodetector. The optical fiber collimator is supported by the base and is located between the clamping mechanism and the photodetector. The clamping mechanism includes a first clamp, a second clamp, a rotating assembly, and a moving assembly. Both the first and second clamps are supported by the base and are used to fix the optical fiber. The rotating assembly is connected to at least one of the first and second clamps and drives at least one of the first and second clamps to rotate, thereby twisting the optical fiber. The moving assembly is connected to and drives at least one of the clamps to move, thereby adjusting the spacing between the first and second clamps.

[0007] Furthermore, the first clamp includes a support component and two grippers. The support component is mounted on a base or a movable component. One of the grippers is connected to the support component. The two grippers are tightly connected by fasteners to form a clamping space for holding optical fibers, through which the optical fibers pass. The second clamp has the same structure as the first clamp.

[0008] Furthermore, the support assembly includes a support frame and a sleeve. The support frame is mounted on the base or the movable assembly, and one of the grippers is connected to the sleeve. When the rotating assembly is driven to the sleeve, the sleeve is rotatably connected to the support frame. When the rotating assembly is not driven to the sleeve, the sleeve is fixedly connected to the support frame.

[0009] Furthermore, the rotating assembly includes a rotating motor, a driving wheel, a driven wheel, and a transmission belt. The rotating motor is mounted on a support frame and is connected to the driving wheel in a transmission connection, so that the rotating motor drives the driving wheel to rotate. The driven wheel is connected to a sleeve, and the driving wheel and the driven wheel are connected in a transmission connection via a transmission belt.

[0010] Furthermore, a preset straight line is defined, which passes through the photodetector, the fiber collimator, the first clamp, and the second clamp, such that the photodetector, the fiber collimator, the first clamp, and the second clamp are arranged side by side, and the optical fiber passes through the first clamp, the second clamp, the fiber collimator, and the photodetector in sequence.

[0011] Furthermore, the distribution direction of the first clamp and the second clamp is defined as a preset direction. The moving component includes a guide rail, a first moving frame and a first moving motor. The guide rail is installed on the base and extends along the preset direction. The first moving frame is movably connected to the guide rail and can move along the guide rail. The first moving motor is installed on the guide rail and is drivenly connected to the first moving frame. The first moving motor drives the first moving frame to move along the guide rail. The first clamp or the second clamp is installed on the first moving frame.

[0012] Furthermore, the moving component also includes a second moving frame and a second moving motor. The second moving frame is movably connected to the guide rail and can move along the guide rail. The second moving motor is driven to move the second moving frame along the guide rail, so that the second moving frame moves closer to or away from the first moving frame. The first clamp and the second clamp are respectively mounted on the first moving frame and the second moving frame.

[0013] Furthermore, the first movable frame includes a movable part, an adjusting part, an adjusting nut, and an adjusting screw. The movable part is movably connected to the guide rail and can move relative to the guide rail in a preset direction. A first movable motor is drivenly connected to the movable part. The adjusting part is movably connected to the movable part and can move relative to the movable part in a preset direction. A first clamp or a second clamp is mounted on the adjusting part. The adjusting nut is mounted on the movable part. One end of the adjusting screw is rotatably connected to the adjusting part, and the other end of the adjusting screw passes through the adjusting nut and is threadedly connected to the adjusting nut. The axis of the adjusting screw is parallel to the preset direction. Rotating the adjusting screw drives the adjusting part to move in the preset direction. The moving accuracy of the adjusting part driven by the adjusting screw is greater than the moving accuracy of the moving part driven by the first movable motor. The second movable frame has the same structure as the first movable frame.

[0014] Furthermore, the moving component also includes a tension sensor for measuring the tension of the optical fiber, the tension sensor being located between the first clamp and the second clamp, through which the optical fiber passes.

[0015] Furthermore, the testing device also includes a light source and a processor. The light source is connected to the end of the optical fiber away from the photodetector, the processor is electrically connected to an optical power meter, and the processor is also electrically connected to a rotating motor.

[0016] In the aforementioned testing apparatus, the optical fiber is held by a first clamp and a second clamp. A rotating component drives at least one of the first clamp and the second clamp to rotate, causing the first clamp and the second clamp to twist the optical fiber. The optical power of the twisted optical fiber is measured by an optical fiber collimator, a photodetector, and an optical power meter to obtain the optical transmission performance of the optical fiber under different twisting conditions. Furthermore, the moving component can adjust the distance between the first clamp and the second clamp, thereby enabling twisting tests on optical fibers of different lengths and adjusting the tension of the optical fiber, thus allowing twisting tests to be performed under different tension levels. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the test device provided in an embodiment of this application.

[0018] Figure 2 A schematic diagram of the combination of the first clamp, the first movable frame, and the first nut seat of the testing device provided in the embodiments of this application.

[0019] Figure 3 Examples of this application Figure 1 Enlarged diagram of point A in the middle.

[0020] Figure 4 A schematic diagram of the combination of the second clamp, the second movable frame, and the second nut seat of the testing device provided in the embodiments of this application.

[0021] Figure 5 This is a schematic diagram of the structure of the first movable frame of the testing device provided in the embodiments of this application. Detailed Implementation

[0022] To enable those skilled in the art to better understand the present application, the technical solutions in specific embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings.

[0023] like Figure 1As shown, this application provides a testing apparatus 100, which includes a base 11, a clamping mechanism 12, a photodetector 13, an optical power meter 14, and an optical fiber collimator 15. The base 11 supports the clamping mechanism 12, the photodetector 13, the optical power meter 14, and the optical fiber collimator 15. The clamping mechanism 12 fixes the optical fiber and can twist it. The photodetector 13 receives optical signals from the optical fiber and converts them into electrical signals. The optical power meter 14 is electrically connected to the photodetector 13, receives the electrical signals from the photodetector 13, and measures the optical fiber power to obtain the optical transmission performance of the optical fiber. The optical fiber collimator 15 is located between the clamping mechanism 12 and the photodetector 13, and focuses the light rays in the optical fiber to facilitate the photodetector 13's reception of the optical signals.

[0024] The clamping mechanism 12 includes a first clamp 121, a second clamp 122, a rotating assembly 123, and a moving assembly 124. The first clamp 121 and the second clamp 122 are both supported by the base 11, and the first clamp 121 and the second clamp 122 are used to fix the optical fiber.

[0025] The rotating component 123 is connected to at least one of the first clamp 121 and the second clamp 122. The rotating component 123 drives at least one of the first clamp 121 and the second clamp 122 to rotate, so that the first clamp 121 and the second clamp 122 twist the optical fiber, thereby enabling the testing device 100 to measure the optical transmission performance of the optical fiber under different torsion conditions.

[0026] The moving component 124 connects to and drives at least one of the first clamp 121 and the second clamp 122 to move, thereby adjusting the spacing between the first clamp 121 and the second clamp 122. This configuration allows for torsion testing of optical fibers of different lengths. Furthermore, the moving component 124 can also adjust the tension of the optical fiber held by the first clamp 121 and the second clamp 122, thereby enabling the measurement of the optical transmission performance of the torsioned optical fiber under different tension levels.

[0027] In summary, in this application, the optical fiber is fixed by the first clamp 121 and the second clamp 122, and the light in the optical fiber is focused by the optical fiber collimator 15, so that the photodetector 13 and the optical power meter 14 can measure the optical fiber power to obtain the optical transmission performance of the optical fiber. The rotation component 123 drives at least one of the first clamp 121 and the second clamp 122 to rotate, causing the first clamp 121 and the second clamp 122 to twist the optical fiber, thereby enabling the measurement of the optical transmission performance of the optical fiber under twisted conditions. Furthermore, the moving component 124 adjusts the distance between the first clamp 121 and the second clamp 122, thereby enabling twist tests on optical fibers of different lengths, and also adjusting the tension of the optical fiber held by the first clamp 121 and the second clamp 122, which is beneficial for measuring the optical transmission performance of the twisted optical fiber under different tension levels.

[0028] like Figure 2 As shown, in one embodiment, the first clamp 121 includes a support assembly 1211 and two grippers 1212. Specifically, the support assembly 1211 is mounted on the base 11 or the moving assembly 124, and the support assembly 1211 is used to support the grippers 1212.

[0029] More specifically, one of the grippers 1212 is connected to the support assembly 1211, and the two grippers 1212 are tightly connected by fasteners so that the two grippers 1212 form a clamping space for clamping the optical fiber. The optical fiber passes through the clamping space to achieve clamping of the optical fiber by the first clamp 121.

[0030] In this embodiment, the second clamp 122 has the same structure as the first clamp 121, and the structure of the second clamp 122 will not be described again in this application.

[0031] In some embodiments, an elastic pad 1212a is installed on the side of the two grippers 1212 near the clamping space. The grippers 1212 clamp the optical fiber through the elastic pad 1212a, so as to avoid the grippers 1212 directly contacting the optical fiber and causing wear to the optical fiber, which helps to protect the optical fiber and improve its service life. For example, the elastic pad 1212a is a rubber pad.

[0032] like Figure 2 and Figure 3 As shown, in one optional implementation, the support assembly 1211 includes a support frame 1211a and a sleeve 1211b. The support frame 1211a is mounted on the base 11 or the moving assembly 124, and supports the sleeve 1211b. One of the grippers 1212 is connected to the sleeve 1211b, allowing the sleeve 1211b to support the gripper 1212. It should be noted that the sleeve 1211b has a hollow structure, allowing an optical fiber to pass through it, which facilitates the connection between the optical fiber and the gripper 1212.

[0033] Specifically, when the rotating component 123 is connected to the sleeve 1211b in a transmission connection, the sleeve 1211b is rotatably connected to the support frame 1211a, so as to facilitate the rotating component 123 to drive the sleeve 1211b and the gripper 1212 to rotate, thereby causing the gripper 1212 to twist the optical fiber.

[0034] When the rotating assembly 123 is not connected to the sleeve 1211b via transmission, the sleeve 1211b is fixedly connected to the support frame 1211a. This configuration avoids the sleeve 1211b being unable to limit the gripper 1212, thus preventing the fiber from being unable to be twisted, which is beneficial for fiber twisting tests.

[0035] For example, the gripper 1212 includes a first gripper 1212b and a second gripper 1212c. The first gripper 1212b is fixedly connected to the sleeve 1211b, and the second gripper 1212c is connected to the first gripper 1212b by a fastener, so that a clamping space is formed between the first gripper 1212b and the second gripper 1212c. The optical fiber passes through the sleeve 1211b and is clamped in the clamping space, thereby realizing the clamping of the optical fiber by the first gripper 1212b and the second gripper 1212c. The rotating assembly 123 drives the sleeve 1211b to rotate, so that the sleeve 1211b drives the first gripper 1212b and the second gripper 1212c to rotate, thereby causing the first gripper 1212b and the second gripper 1212c to drive the optical fiber to twist, which is beneficial for twisting the optical fiber.

[0036] In some embodiments, the rotating assembly 123 is connected to the sleeve 1211b in the first clamp 121, the sleeve 1211b in the first clamp 121 is rotatably connected to the support frame 1211a, and the sleeve in the second clamp 122 is fixedly connected to the corresponding support frame, thereby limiting the gripper in the second clamp 122. The rotating assembly 123 drives the sleeve 1211b in the first clamp 121 to rotate, thereby causing the sleeve 1211b in the first clamp 121 to drive the gripper 1212 and the optical fiber to rotate. Since the sleeve and gripper in the second clamp 122 are in fixed positions, the rotation of the gripper 1212 in the first clamp 121 can drive the optical fiber to twist, which is beneficial for the torsion test of the optical fiber.

[0037] In other embodiments, two rotating components 123 are provided, and the two rotating components 123 are respectively connected to the sleeve 1211b in the first clamp 121 and the sleeve in the second clamp 122. The sleeve 1211b in the first clamp 121 is rotatably connected to the support frame 1211a, and the sleeve in the second clamp 122 is rotatably connected to the corresponding support frame. One rotating component 123 drives the sleeve 1211b in the first clamp 121 to rotate in a first rotation direction, thereby causing the sleeve 1211b in the first clamp 121 to drive the corresponding gripper 1212 and the optical fiber to rotate in the first rotation direction; the other rotating component 123 drives the sleeve in the second clamp 122 to rotate in a second rotation direction, thereby causing the sleeve in the second clamp 122 to drive the corresponding gripper and the optical fiber to rotate in the second rotation direction. The first rotation direction and the second rotation direction are opposite, thereby enabling the first clamp 121 and the second clamp 122 to simultaneously twist the optical fiber, thereby improving the twisting efficiency of the optical fiber and thus improving the twisting test efficiency of the optical fiber testing device 100.

[0038] like Figure 3 As shown, in one embodiment, the rotating assembly 123 includes a rotating motor 1231, a driving wheel 1232, a driven wheel 1233, and a transmission belt 1234. The rotating motor 1231 is mounted on the support frame 1211a, and is drive-connected to the driving wheel 1232, causing the rotating motor 1231 to drive the driving wheel 1232 to rotate. The driven wheel 1233 is connected to the sleeve 1211b, and the driving wheel 1232 and driven wheel 1233 are drive-connected via the transmission belt 1234. With this configuration, the rotating motor 1231 drives the driving wheel 1232 to rotate, and the driving wheel 1232 drives the driven wheel 1233 to rotate via the transmission belt 1234. This causes the driven wheel 1233 to drive the sleeve 1211b to rotate, which in turn drives the gripper 1212 to rotate, thereby achieving optical fiber twisting.

[0039] like Figure 1 As shown, in one implementation, a preset straight line is defined, passing through the photodetector 13, the fiber collimator 15, the first clamp 121, and the second clamp 122, so that the photodetector 13, the fiber collimator 15, the first clamp 121, and the second clamp 122 are arranged side by side. Specifically, the optical fiber passes through the first clamp 121, the second clamp 122, the fiber collimator 15, and the photodetector 13 in sequence. This arrangement avoids the optical fiber being bent when passing through the components if they are not arranged side by side, thus preventing the optical fiber from being bent and affecting its optical transmission performance. This avoids interference with the optical power meter 14's measurement of the optical fiber's optical transmission performance, thereby improving the measurement accuracy of the testing device 100.

[0040] like Figure 2As shown, in one embodiment, the distribution direction of the first clamp 121 and the second clamp 122 is defined as a preset direction. In this application, the preset straight line extends along the preset direction. Specifically, the moving component 124 includes a guide rail 1241, a first moving frame 1242, and a first moving motor 1243. The guide rail 1241 is mounted on the base 11 and extends along the preset direction. The first moving frame 1242 is movably connected to the guide rail 1241 and can move along the guide rail 1241. The first moving motor 1243 is mounted on the guide rail 1241, and the first moving frame 1242 is drively connected to the first moving frame 1242, so that the first moving motor 1243 drives the first moving frame 1242 to move along the guide rail 1241.

[0041] More specifically, the first clamp 121 or the second clamp 122 is mounted on the first movable frame 1242, thereby driving the first movable frame 1242 to move via the first movable motor 1243. This causes the first movable frame 1242 to move the first clamp 121 or the second clamp 122, thereby adjusting the distance between the first clamp 121 and the second clamp 122 to facilitate clamping optical fibers of different lengths. Furthermore, when the first clamp 121 and the second clamp 122 clamp optical fibers, adjusting the aforementioned distance helps to adjust the tension of the optical fibers clamped by the first clamp 121 and the second clamp 122, which in turn facilitates optical fiber torsion testing under different tension levels.

[0042] like Figure 1 and Figure 2 As shown, in some embodiments, the moving assembly 124 further includes a lead screw 1244 and a first nut seat 1245. The lead screw 1244 is rotatably mounted on the guide rail 1241, and the first nut seat 1245 is connected to the lead screw 1244. A first moving motor 1243 is drivenly connected to the lead screw 1244, so that the first moving motor 1243 drives the lead screw 1244 to rotate. Specifically, the axial direction of the lead screw 1244 is parallel to a preset direction, so that the lead screw 1244 drives the first nut seat 1245 to move along the preset direction. A first moving frame 1242 is mounted on the first nut seat 1245, so that the first nut seat 1245 can drive the first moving frame 1242 to move, thereby adjusting the distance between the first clamp 121 and the second clamp 122.

[0043] like Figure 2 and Figure 4As shown, in one embodiment, when the moving component 124 can simultaneously drive the first clamp 121 and the second clamp 122 to move, the moving component 124 further includes a second moving frame 1246 and a second moving motor (not shown). The second moving frame 1246 is movably connected to the guide rail 1241 and can move along the guide rail 1241. The second moving motor is drively connected to the second moving frame 1246, so that the second moving motor drives the second moving frame 1246 to move along the guide rail 1241, thereby causing the second moving frame 1246 to move closer to or further away from the first moving frame 1242.

[0044] Specifically, the first clamp 121 and the second clamp 122 are respectively mounted on the first movable frame 1242 and the second movable frame 1246. With this configuration, the first movable motor 1243 and the second movable motor can drive the first clamp 121 and the second clamp 122 to move, thereby improving the efficiency of adjusting the distance between the first clamp 121 and the second clamp 122, and thus improving the testing efficiency of the testing device 100.

[0045] In this embodiment, the transmission method of the second moving motor and the second moving frame 1246 is the same as that of the first moving motor 1243 and the first moving frame 1242, and will not be described in detail here.

[0046] It should be noted that this application can also simultaneously drive the first moving frame 1242 and the second moving frame 1246 to move via the first rotating motor 1231. For example, the lead screw 1244 (refer to...) Figure 1 The rotating assembly 123 is symmetrically provided with a first threaded section (not shown) and a second threaded section (not shown), meaning the lead screw 1244 is a bidirectional lead screw. The rotating assembly 123 also includes a second nut seat 1247. The first nut seat 1245 and the second nut seat 1247 are respectively connected to the first threaded section and the second threaded section. A first clamp 121 is mounted on the first nut seat 1245, and a second clamp 122 is mounted on the second nut seat 1247. The threads of the first and second threaded sections have opposite directions, so that when the first moving motor 1243 drives the lead screw 1244 to rotate, the lead screw 1244 can drive the first nut seat 1245 and the second nut seat 1247 to move towards each other, thereby adjusting the distance between the first clamp 121 and the second clamp 122. This application describes an example where the rotating assembly 124 only includes the first moving motor 1243, and the first clamp 121 is mounted on the first moving frame 1242.

[0047] like Figure 2 and Figure 5As shown, in one embodiment, the first movable frame 1242 includes a movable part 1242a, an adjusting part 1242b, an adjusting nut 1242c, and an adjusting screw 1242d. The movable part 1242a is movably connected to the guide rail 1241 and can move relative to the guide rail 1241 along a preset direction. A first movable motor 1243 is drively connected to the movable part 1242a, enabling the first movable motor 1243 to drive the movable part 1242a to move along the preset direction.

[0048] The adjusting part 1242b is movably connected to the moving part 1242a. The adjusting part 1242b can move relative to the moving part 1242a in a preset direction. The first clamp 121 or the second clamp 122 is mounted on the adjusting part 1242b, so that the first moving motor 1243 drives the first clamp 121 or the second clamp 122 to move through the moving part 1242a and the adjusting part 1242b. In this embodiment, the second moving frame 1246 and the first moving frame 1242 have the same structure, and the structure of the second moving frame 1246 will not be described again in this application. Next, this application will describe the first clamp 121 mounted on the adjusting part 1242b as an example.

[0049] Specifically, the adjusting nut 1242c is mounted on the moving part 1242a, one end of the adjusting screw 1242d is rotatably connected to the adjusting part 1242b, and the other end of the adjusting screw 1242d passes through the adjusting nut 1242c and is threadedly connected to the adjusting nut 1242c. The axis of the adjusting screw 1242d is parallel to a preset direction, so that rotating the adjusting screw 1242d drives the adjusting part 1242b to move along the preset direction, thereby driving the first clamp 121 to move by rotating the adjusting screw 1242d.

[0050] More specifically, the adjustment screw 1242d drives the adjustment part 1242b with greater movement accuracy than the first moving motor 1243 drives the moving part 1242a. With this configuration, after the first clamp 121 and the second clamp 122 hold the optical fiber, the first moving motor 1243 drives the first clamp 121 to move, adjusting the distance between the first clamp 121 and the second clamp 122, thereby achieving coarse adjustment of the optical fiber tension. Then, the adjustment screw 1242d drives the adjustment part 1242b to move, causing the adjustment part 1242b to further move the first clamp 121, further adjusting the distance between the first clamp 121 and the second clamp 122, thereby achieving fine adjustment of the optical fiber tension and improving the control accuracy of the tension of the optical fiber by the first clamp 121 and the second clamp 122.

[0051] like Figure 1As shown, in one embodiment, the moving component 124 further includes a tension sensor 1248 for measuring the tension of the optical fiber. Specifically, the tension sensor 1248 is located between the first clamp 121 and the second clamp 122, and the optical fiber passes through the tension sensor 1248. This arrangement allows the tension sensor 1248 to measure the tension of the optical fiber between the first clamp 121 and the second clamp 122, which facilitates control of the optical fiber tension.

[0052] In one implementation, the testing apparatus 100 further includes a light source 16 and a processor 17. The light source 16 is connected to the end of the optical fiber furthest from the photodetector 13, thereby enabling the input of the light source 16 to the optical fiber to facilitate power measurement. The processor 17 is electrically connected to an optical power meter 14, enabling it to receive optical power data to obtain the optical transmission performance of the optical fiber. The processor 17 is also electrically connected to a rotating motor 1231, enabling it to receive rotation data from the rotating motor 1231. Based on this rotation data, the processor 17 obtains different numbers of twists in the optical fiber, thus determining different twist states. This allows the processor 17 to obtain a curve showing the relationship between optical fiber twist and optical transmission performance, based on the number of twists and the optical transmission performance, to measure the optical transmission performance of the optical fiber under different twist conditions.

[0053] More specifically, the processor 17 is also connected to the tension sensor 1248, which is able to receive the tension data of the optical fiber, thereby enabling optical fiber torsion testing under different tension levels.

[0054] It should be understood that those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A test device, characterized by include: Base; A clamping mechanism, supported by the base and used to secure the optical fiber; A photodetector, supported by the base, is capable of receiving optical signals from the optical fiber; An optical power meter, supported by the base, is electrically connected to the photodetector. An optical fiber collimator, supported by the base, is located between the clamping mechanism and the photodetector; The clamping mechanism includes: A first clamp and a second clamp, both supported by the base, are used to fix the optical fiber; A rotating assembly connected to at least one of the first clamp and the second clamp, the rotating assembly driving at least one of the first clamp and the second clamp to rotate, thereby twisting the optical fiber; A movable component, wherein at least one of the movable components is connected and driven to move to adjust the spacing between the first clamp and the second clamp.

2. The testing apparatus according to claim 1, characterized in that, The first clamp includes a support assembly and two jaws. The support assembly is mounted on the base or the moving assembly. One of the jaws is connected to the support assembly. The two jaws are tightly connected by fasteners to form a clamping space for clamping the optical fiber, through which the optical fiber passes. The second clamp has the same structure as the first clamp.

3. The testing apparatus according to claim 2, characterized in that, The support assembly includes a support frame and a sleeve. The support frame is mounted on the base or the movable assembly, and one of the grippers is connected to the sleeve. When the rotating assembly is driven to the sleeve, the sleeve is rotatably connected to the support frame. When the rotating assembly is not driven to the sleeve, the sleeve is fixedly connected to the support frame.

4. The test apparatus according to claim 3, characterized in that, The rotating assembly includes a rotating motor, a driving wheel, a driven wheel, and a transmission belt. The rotating motor is mounted on the support frame and is connected to the driving wheel so that the rotating motor drives the driving wheel to rotate. The driven wheel is connected to the sleeve, and the driving wheel and the driven wheel are connected by the transmission belt.

5. The testing apparatus according to claim 1, characterized in that, Define a preset straight line that passes through the photodetector, the fiber collimator, the first clamp, and the second clamp, such that the photodetector, the fiber collimator, the first clamp, and the second clamp are arranged side by side, and the optical fiber passes through the first clamp, the second clamp, the fiber collimator, and the photodetector in sequence.

6. The testing apparatus according to claim 1, characterized in that, The distribution direction of the first clamp and the second clamp is defined as a preset direction. The moving component includes a guide rail, a first moving frame and a first moving motor. The guide rail is installed on the base and extends along the preset direction. The first moving frame is movably connected to the guide rail and can move along the guide rail. The first moving motor is installed on the guide rail and is drivenly connected to the first moving frame. The first moving motor drives the first moving frame to move along the guide rail. The first clamp or the second clamp is installed on the first moving frame.

7. The testing apparatus according to claim 6, characterized in that, The moving component further includes a second moving frame and a second moving motor. The second moving frame is movably connected to the guide rail and can move along the guide rail. The second moving motor is driven to move the second moving frame along the guide rail, so that the second moving frame moves closer to or away from the first moving frame. The first clamp and the second clamp are respectively mounted on the first moving frame and the second moving frame.

8. The testing apparatus according to claim 7, characterized in that, The first movable frame includes a movable part, an adjusting part, an adjusting nut, and an adjusting screw. The movable part is movably connected to the guide rail and can move relative to the guide rail in a preset direction. The first movable motor is drivenly connected to the movable part. The adjusting part is movably connected to the movable part and can move relative to the movable part in a preset direction. The first clamp or the second clamp is mounted on the adjusting part. The adjusting nut is mounted on the movable part. One end of the adjusting screw is rotatably connected to the adjusting part, and the other end of the adjusting screw passes through the adjusting nut and is threadedly connected to the adjusting nut. The axis of the adjusting screw is parallel to the preset direction. Rotating the adjusting screw drives the adjusting part to move in the preset direction. The moving accuracy of the adjusting screw driving the adjusting part is greater than the moving accuracy of the first moving motor driving the moving part; The second movable frame has the same structure as the first movable frame.

9. The testing apparatus according to claim 8, characterized in that, The moving component also includes a tension sensor for measuring the tension of the optical fiber, the tension sensor being located between the first clamp and the second clamp, through which the optical fiber passes.

10. The testing apparatus according to claim 4, characterized in that, The testing device also includes a light source and a processor. The light source is connected to the end of the optical fiber away from the photodetector. The processor is electrically connected to the optical power meter and also electrically connected to the rotating motor.

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