A bending method for wave-shifting optical fibers

Abstract

This invention relates to a bending method for wave-shifting optical fibers, comprising the following steps: Step 1, installing wave-shifting optical fibers side-by-side on an optical fiber bending bracket and pressing the fibers together; Step 2, placing the bending bracket containing the optical fibers onto a bending mechanism, which lowers the bracket into a constant-temperature water tank at 85 degrees Celsius for immersion; Step 3, bending the two bending plates of the bending bracket upwards relative to each other using the bending mechanism, ensuring the flat portion remains submerged in the constant-temperature water tank during bending; Step 4, raising the bent bracket to a position above the water surface using the bending mechanism, then cooling the bracket with a blower, and finally removing the bracket to complete the wave-shifting optical fiber bending operation; using a bending device to automatically bend the wave-shifting optical fibers on the bending bracket within a constant-temperature water tank ensures effective bending of the wave-shifting optical fibers.

Description

Technical Field

[0001] This invention relates to the field of detector application equipment at the China Spallation Neutron Source, and particularly to a method for bending wave-shifting optical fibers. Background Technology

[0002] The detectors at the China Spallation Neutron Source include scintillator detectors. Existing scintillator detectors require wave-shifting optical fibers for signal transmission. Wave-shifting optical fibers are very expensive, and most are currently imported, costing around $17 per meter. These fibers are also brittle and easily bent, leading to light leakage and affecting signal transmission. During the development of this detector, a 90-degree bend in the wave-shifting fiber was required. To achieve this, a bending support was designed, comprising a flat plate 31 and a bending plate 32 that can rotate relative to the plate, connected at both ends by pins 33. The flat plate has fiber slots, and the bending plate has a clamping device. After the wave-shifting fiber is installed on the bending support, a bending operation is required. Currently, bending is mostly done manually based on experience, resulting in low yield rates and potential damage to the fiber or insufficient light conductivity. Summary of the Invention

[0003] The purpose of this invention is to provide a bending method for wave-shifting optical fibers. The bending device automatically completes the bending of the wave-shifting optical fibers on the bending support in a constant temperature water tank, which can ensure the bending effect of the wave-shifting optical fibers.

[0004] To achieve the above objectives, the technical solution adopted by this invention is: a bending method for wave-shifting optical fibers, comprising the following steps:

[0005] Step 1: Install the wave-shifting optical fibers side by side on the optical fiber bending bracket and press the fibers firmly.

[0006] Step 2: Place the bending bracket containing the optical fiber onto the bending mechanism, and use the bending mechanism to lower the bending bracket into a constant temperature water tank at 85 degrees Celsius for immersion.

[0007] Step 3: The two bending plates of the bending bracket are bent upward relative to the flat plate by the bending mechanism. During the bending process, the flat plate is always in the constant temperature water tank.

[0008] Step 4: The bending bracket is raised to a position above the liquid surface of the constant temperature water tank by the bending mechanism. Then, the bending bracket is cooled by blowing air through it by a blower. After that, the bending bracket is removed to complete the bending operation of the wave-shifted optical fiber.

[0009] Preferably, in step two, the bending bracket is immersed in a constant temperature water tank at 85 degrees Celsius for 8-12 seconds.

[0010] Preferably, in step three, the bending mechanism bends the support bracket at a speed of 10 degrees / second in the constant temperature water tank.

[0011] Preferably, in step four, the blower cools the raised bending support for 10-15 seconds.

[0012] Preferably, the bending mechanism includes a bending mounting base mounted on a bending mounting frame, a bending lifting device mounted on the bending mounting base, a bending device connected to the bending lifting device, and a bending mounting plate on the bending lifting device. A bending support block is provided on the front side of the bending mounting plate, and two bending insertion holes are provided on the front side of the bending mounting plate to engage with two pins. Two bending arc grooves are also formed on the bending mounting plate, and the two bending arc grooves coincide with the axes of the two bending insertion holes. A bending rod is provided in the two bending arc grooves, and the bending rod moves within the bending arc grooves through a bending drive structure, and the bending rod can be inserted into the side of the bending plate.

[0013] Preferably, the bending support block has a bending limiting block at the front end and a bending locking block at the rear end, the bending insertion hole is provided on the bending locking block, and the distance between the bending locking block and the bending limiting block is consistent with the width of the plate.

[0014] Preferably, the bending drive structure includes a bending gear mounted on a bending mounting plate, and the bending gear coincides with the axis of the corresponding bending arc groove. The bending insert is mounted on the bending gear, and the bending gears of the two bending drive structures mesh with each other and cooperate with the bending motor on the bending mounting plate through the bending transmission gear.

[0015] Preferably, the bending lifting device includes a bending lifting motor and a vertically oriented bending lifting screw mounted on a bending mounting base. The bending lifting motor and the bending lifting screw are connected by a transmission structure. A bending lifting movable block is sleeved on the bending lifting screw, and the bending lifting movable block is located on the rear side of the bending mounting base. The bending mounting plate is located on the front side of the bending mounting base, and a bending lifting groove is provided on the bending mounting base. The bending lifting movable block is connected to the bending mounting plate through a lifting connecting block passing through the bending lifting groove.

[0016] Preferably, the constant temperature water tank is an open tank, and the part of the constant temperature water tank that does not cooperate with the bending mechanism is provided with a concave sealing block, and the height difference between the bottom plate of the sealing block and the liquid surface of the constant temperature water tank is no more than 10mm.

[0017] The technical effects of this invention are as follows:

[0018] 1. The bending device automatically completes the bending of the wave-shifted optical fiber on the bending bracket in a constant temperature water tank, which can ensure the bending effect of the wave-shifted optical fiber. After immersing in the constant temperature water tank at 85 degrees Celsius for 8-12 seconds, it is bent at a speed of 10 degrees / second. The setting of immersion time and bending speed can ensure that the wave-shifted optical fiber has good performance after bending. The blower cools the wave-shifted optical fiber after bending. The air cooling time can ensure that the wave-shifted optical fiber is cooled down after bending, and there will be no further bending during the subsequent material handling process, further ensuring efficiency.

[0019] 2. The bending device is designed to be able to be inserted and matched with the bending bracket, and to enable the bending plate of the bending bracket to bend according to the set trajectory, so as to ensure the bending effect.

[0020] 3. The design of the bending clip and bending limit block on the bending support block can lock the flat part of the bending bracket and prevent shaking during the bending process.

[0021] 4. The bending drive structure uses two meshing gears to enable the two bending rods to move within the bending arc groove, thereby ensuring that the two bends are performed synchronously and symmetrically, and that the bending process is in a dynamic equilibrium state.

[0022] 5. The structural design of the bending lifting device enables lifting without interfering with the installation of the bending device. This allows the bending drive part of the bending device to be installed on the rear side of the bending mounting plate, thus reducing the overall width that the device needs to enter the constant temperature water tank and improving the heat preservation effect of the constant temperature water tank.

[0023] 6. The design of the sealing block of the constant temperature water tank can seal off the parts of the constant temperature water tank that do not cooperate with the bending device, so as to prevent heat loss too quickly and achieve a good heat preservation effect. Attached Figure Description

[0024] Figure 1 A three-dimensional schematic diagram of a bending mechanism with a bending bracket and a constant temperature water tank.

[0025] Figure 2 This is a three-dimensional schematic diagram of the bending mechanism and the constant temperature water tank without the bending bracket installed.

[0026] Figure 3 This is a frontal three-dimensional schematic diagram of the bending mechanism.

[0027] Figure 4 This is a rear-view three-dimensional schematic diagram of the bending mechanism.

[0028] Figure 5 This is a rear-view three-dimensional schematic diagram of the bending device.

[0029] Figure 6 This is a front-view three-dimensional schematic diagram of the bending device.

[0030] Figure 7 This is a three-dimensional schematic diagram of the bending device and the bending bracket working together.

[0031] The text labels in the diagram represent: 1. Constant temperature water tank; 2. Bending mounting bracket; 3. Bending mechanism; 4. Bending support; 5. Blower; 6. Enclosure block; 11. Bending mounting seat; 12. Bending lifting device; 13. Bending device; 14. Bending lifting motor; 15. Bending lifting lead screw; 16. Bending lifting movable block; 17. Bending lifting groove; 18. Bending mounting plate; 19. Bending motor; 20. Bending support block; 21. Bending limit block; 22. Bending insertion hole; 23. Bending arc groove; 24. Bending insertion rod; 25. Bending gear; 26. Bending transmission gear; 31. Flat plate; 32. Bending plate; 33. Pin shaft. Detailed Implementation

[0032] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be described in detail below with reference to the accompanying drawings. The description in this part is only exemplary and explanatory, and should not be used to limit the scope of protection of the present invention in any way.

[0033] like Figure 1-2 As shown, the constant temperature water tank 1 used in the bending method of this application is an open box, and the part of the constant temperature water tank 1 that does not cooperate with the bending mechanism is provided with a concave sealing block 6. The height difference between the bottom plate of the sealing block 6 and the liquid surface of the constant temperature water tank 1 is no more than 10mm, which can seal the part of the constant temperature water tank that does not cooperate with the bending device, avoid heat loss too quickly, and achieve a good heat preservation effect.

[0034] like Figure 3-7As shown, the specific structure of the bending mechanism of this application is as follows: the bending mechanism 3 includes a bending mounting base 11 mounted on the bending mounting frame 2, a bending lifting device 12 mounted on the bending mounting base 11, a bending device 13 connected to the bending lifting device 12, and a bending mounting plate 18 mounted on the bending lifting device 12. A bending support block 20 is provided on the front side of the bending mounting plate 18, and two bending supports that are inserted and engaged with two pins 33 are provided on the front side of the bending mounting plate 18. The bending mounting plate 18 also has two bending arc grooves 23, which coincide with the axes of the two bending insertion holes 22. Bending rods 24 are installed within the two bending arc grooves 23. These bending rods 24 move within the bending arc grooves 23 via a bending drive structure and can be inserted into the side of the bending plate 32. The bending support block 20 has a bending limit block 21 at its front end and a bending locking block at its rear end. The bending insertion holes 22 are located on the bending locking blocks. The distance between the bending clamp and the bending limit block 21 is consistent with the width of the flat plate 31. The bending drive structure includes a bending gear 25 mounted on the bending mounting plate 18, and the bending gear 25 coincides with the axis of the corresponding bending arc groove 23. The bending insert 24 is mounted on the bending gear 25. The bending gears 25 of the two bending drive structures mesh with each other and cooperate with the bending motor 19 on the bending mounting plate 18 through the bending transmission gear 26. The bending lifting device 12 includes a device mounted on the bending mounting base 11. The bending lifting motor 14 and the vertically oriented bending lifting screw 15 are connected by a transmission structure. The bending lifting screw 15 is sleeved with a bending lifting movable block 16, which is located behind the bending mounting base 11. The bending mounting plate 18 is located in front of the bending mounting base 11, and the bending mounting base 11 has a bending lifting groove 17. The bending lifting movable block 16 is connected to the bending mounting plate 18 through a lifting connecting block that passes through the bending lifting groove 17.

[0035] The bending mechanism of this application mainly includes two actions: bending and lifting. The specific bending operation involves placing the flat portion of the fiber optic bending bracket onto the bending support block 20, inserting the pin into the bending insertion hole 22, and simultaneously inserting the bending rod 24 into the hole of the bending plate 32. The bending plate 32 is then secured by the bending limiting block 21 and the bending clamping block. When bending is required, the bending motor 19 drives the bending transmission gear 26 to rotate, which in turn drives the two bending gears 25 to rotate in opposite directions. This, in turn, drives the two bending rods 24 to move towards the center within the bending arc groove 23. This allows the two plates 32 to bend around the pin 33. By controlling the rotational speed of the bending motor 19, the bending speed can be controlled. The bending angular velocity is controlled to achieve uniform bending. After the fiber optic bending bracket is removed, the bending motor 19 rotates in the opposite direction, causing the bending insert 24 to return to its original position. The lifting action is achieved by the bending lifting motor 14 driving the bending lifting screw 15 to rotate, which in turn drives the bending lifting movable block 16 to lift. This, in turn, drives the bending mounting plate 18 of the bending part to lift through the lifting connecting block passing through the bending lifting groove 17. The structural design of the bending lifting device enables lifting without interfering with the installation of the bending device. This allows the bending drive part of the bending device to be installed on the rear side of the bending mounting plate, thus reducing the overall width of the device entering the constant temperature water tank and improving the heat preservation effect of the constant temperature water tank.

[0036] A method for bending wave-shifting optical fibers using the aforementioned constant-temperature water tank and bending mechanism includes the following steps:

[0037] Step 1: Install the wave-shifting optical fibers side by side on the optical fiber bending bracket and press the fibers firmly.

[0038] Step 2: Place the bending bracket containing the optical fiber onto the bending mechanism, and use the bending mechanism to lower the bending bracket into a constant temperature water tank of 85 degrees Celsius for immersion for 8-12 seconds.

[0039] Step 3: The two bending plates of the fiber optic bending bracket are bent upward relative to the flat plate by the bending mechanism, and the bending angular velocity of the bending plates is 10 degrees / second. During the bending process, the flat plate is always in a constant temperature water tank.

[0040] Step 4: Using the bending mechanism, raise the bent bracket to a position above the liquid surface of the constant temperature water tank. Then, use a blower to cool the bent bracket for 10-15 seconds. After that, remove the bent bracket to complete the bending operation of the wave-shifted optical fiber.

[0041] In practice, soaking times of 8s, 10s, and 12s and air-cooling times of 10s, 12s, and 15s were performed, and the above parameters were combined in various ways. The obtained bent wave-shifted fiber was then subjected to illumination testing, and it was found that the bent wave-shifted fiber had good light conductivity, which could meet the requirements for the fabrication of scintillator detectors.

[0042] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0043] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only for the purpose of helping to understand the method and core ideas of the present invention. The above descriptions are only preferred embodiments of the present invention. It should be noted that due to the limitations of textual expression, while there are objectively infinite specific structures, those skilled in the art can make several improvements, modifications, or changes without departing from the principles of the present invention, and can also combine the above technical features in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the inventive concept and technical solution to other situations without modification, should all be considered within the scope of protection of the present invention.

Claims

1. A method for bending wave-shifting optical fibers, characterized in that, Includes the following steps: Step 1: Install the wave-shifting optical fibers side by side on the optical fiber bending bracket and press the fibers firmly. Step 2: Place the bending bracket containing the optical fiber onto the bending mechanism, and use the bending mechanism to lower the bending bracket into a constant temperature water tank at 85 degrees Celsius for immersion. Step 3: The two bending plates of the bending bracket are bent upward relative to the flat plate by the bending mechanism. During the bending process, the flat plate is always in the constant temperature water tank. Step 4: The bending bracket is raised to a position above the liquid surface of the constant temperature water tank by the bending mechanism. Then, the bending bracket is cooled by blowing air through the blower. After that, the bending bracket is removed to complete the bending operation of the wave-shifted optical fiber. In step two, the bending bracket is immersed in a constant temperature water tank at 85 degrees Celsius for 8-12 seconds. In step three, the bending mechanism bends the bracket in the constant temperature water tank at a speed of 10 degrees / second. The bending mechanism (3) includes a bending mounting seat (11) mounted on a bending mounting frame (2). A bending lifting device (12) is mounted on the bending mounting seat (11). A bending device (13) is connected to the bending lifting device (12). The bending device (13) includes a bending mounting plate (18) on the bending lifting device (12). A bending support block (20) and two pins connected to the bending bracket are provided on the front side of the bending mounting plate (18). The shaft (33) is connected to two bent insertion holes (22). The bent mounting plate (18) is also provided with two bent arc grooves (23). The two bent arc grooves (23) are respectively aligned with the axes of the two bent insertion holes (22). A bent insertion rod (24) is provided in the two bent arc grooves (23). The bent insertion rod (24) moves in the bent arc groove (23) through the bending drive structure. The bent insertion rod (24) can be inserted into the side of the bent plate (32).

2. The bending method for wave-shifting optical fiber according to claim 1, characterized in that, In step four, the blower cools the raised bending support for 10-15 seconds.

3. The bending method for wave-shifting optical fiber according to claim 1, characterized in that, The bending support block (20) has a bending limit block (21) at the front end and a bending clip at the rear end. The bending insertion hole (22) is located on the bending clip, and the distance between the bending clip and the bending limit block (21) is the same as the width of the plate (31).

4. The bending method for wave-shifting optical fiber according to claim 1, characterized in that, The bending drive structure includes a bending gear (25) mounted on a bending mounting plate (18), and the bending gear (25) coincides with the axis of the corresponding bending arc groove (23). The bending insert (24) is mounted on the bending gear (25). The bending gears (25) of the two bending drive structures mesh with each other and cooperate with the bending motor (19) on the bending mounting plate (18) through the bending transmission gear (26).

5. The bending method for wave-shifting optical fiber according to claim 1, characterized in that, The bending lifting device (12) includes a bending lifting motor (14) and a vertically oriented bending lifting screw (15) mounted on a bending mounting base (11). The bending lifting motor (14) and the bending lifting screw (15) are connected by a transmission structure. The bending lifting screw (15) is sleeved with a bending lifting movable block (16). The bending lifting movable block (16) is located on the rear side of the bending mounting base (11). The bending mounting plate (18) is located on the front side of the bending mounting base (11). A bending lifting groove (17) is provided on the bending mounting base (11). The bending lifting movable block (16) is connected to the bending mounting plate (18) through a lifting connecting block passing through the bending lifting groove (17).

6. The bending method for wave-shifting optical fiber according to claim 1, characterized in that, The constant temperature water tank (1) is an open box, and a concave sealing block (6) is provided in the part of the constant temperature water tank (1) that does not cooperate with the bending mechanism, and the height difference between the bottom plate of the sealing block (6) and the liquid surface of the constant temperature water tank (1) is no more than 10mm.

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