Optical fiber connector assembly for measuring rotating speed of photoelectric sensor

Abstract

The invention discloses an optical fiber connector assembly for measuring the rotating speed of a photoelectric sensor, and relates to the technical field of optical fiber connectors, the optical fiber connector assembly comprises a locking cap, a dustproof cap, a fixed connector and a protective hose, one side of the locking cap is connected with the protective hose, an optical fiber body is arranged in the protective hose, and inner threads are arranged on the inner walls of the fixed connector and the locking cap. The side, away from the protective hose, of the locking cap is connected with the outer wall of the fixing connector through internal threads in a threaded mode, the side, away from the locking cap, of the fixing connector is connected with the outer wall of the dustproof cap through internal threads in a threaded mode, and the outer walls of the fixing connector and the locking cap are provided with a first sealing ring and a second sealing ring through waterproof gel. The device is composed of a compression-resistant and tensile layer, an anticorrosive layer and a self-repairing coating, has good bending resistance, has the advantage of effectively protecting an optical fiber line from mechanical damage, has good scratch resistance and rapid repairing effects, and is suitable for long-time testing and use.

Description

Technical Field

[0001] The present invention relates to the technical field of fiber optic connectors, and specifically to an optical fiber connector assembly for measuring rotational speed by an optoelectronic sensor. Background Art

[0002] In an optoelectronic sensor, an optical fiber is an important component of the optoelectronic sensor, which is responsible for transmitting optical signals. The optical fiber sensor uses the optical fiber as the transmission medium and combines optoelectronic conversion technology to achieve long-distance and high-precision object presence sensing.

[0003] However, the existing optical fiber connector assembly for measuring rotational speed by an optoelectronic sensor has the following problems during use: In traditional optoelectronic sensors, the optical fiber cannot be quickly installed and removed, making installation and maintenance inconvenient, and not facilitating wiring. The optical fiber cannot be bent to the required radius, and it is easy to be damaged due to bending and stretching, and it is impossible to ensure long-term stable operation. Summary of the Invention

[0004] The purpose of the present invention is to provide an optical fiber connector assembly for measuring rotational speed by an optoelectronic sensor to solve the related problems raised in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solution: An optical fiber connector assembly for measuring rotational speed by an optoelectronic sensor, including a locking cap, a dust cap, a fixed connector, and a protective hose. One side of the locking cap is connected to the protective hose, and the optical fiber body is arranged inside the protective hose. Internal threads are provided on the inner walls of both the fixed connector and the locking cap. The side of the locking cap away from the protective hose is threadedly connected to the outer wall of the fixed connector through the internal thread. The side of the fixed connector away from the locking cap is threadedly connected to the outer wall of the dust cap through the internal thread. First and second sealing rings are provided on the outer walls of both the fixed connector and the locking cap through waterproof gel; Among them, the protective hose is a multi-layer composite structure composed of a compressive and tensile layer, an anti-corrosion layer, and a self-healing coating.

[0006] For the optical fiber connector assembly for measuring rotational speed by an optoelectronic sensor provided by this technical solution, a connecting column is installed on one side of the dust cap, and a sealing cap penetrating the fixed connector and the protective hose is installed on the side of the connecting column away from the dust cap.

[0007] For the optical fiber connector assembly for measuring rotational speed by an optoelectronic sensor provided by this technical solution, the inner wall of the sealing cap is tightly fitted and adapted to the first and second sealing rings.

[0008] For the optical fiber connector assembly for measuring rotational speed by an optoelectronic sensor provided by this technical solution, the compressive and tensile layer is a Kevlar fiber and fiberglass mesh cross-woven structure.

[0009] An optical fiber connector assembly for measuring the rotational speed of an optoelectronic sensor provided by this technical solution, wherein the anti-corrosion layer is a PVC protective tube.

[0010] An optical fiber connector assembly for measuring the rotational speed of an optoelectronic sensor provided by this technical solution, wherein the self-healing coating is a waterborne polyurethane resin.

[0011] Compared with the prior art, the present invention provides an optical fiber connector assembly for measuring the rotational speed of an optoelectronic sensor, having the following beneficial effects: 1. In the present invention, 10 thin optical fibers are respectively used for the transmitting end and the receiving end, and there will be no situation where the light of the optical fiber becomes weak during rotational speed measurement, resulting in unstable measurement. Glue is applied above the fixed connector, the dust cap is threadedly connected to the fixed connector, and the fixed connector is threadedly connected to the protective hose, which has the advantages of being easy to disassemble and supporting partial replacement and repair.

[0012] 2. The protective hose of the present invention is composed of a compressive and tensile layer, an anti-corrosion layer, and a self-healing coating, having good anti-bending performance, the advantage of effectively protecting the optical fiber line from mechanical damage, and good anti-scratching and rapid repair effects, and is suitable for long-term test use.

[0013] 3. In the present invention, the rotating sealing cap is engaged with the internal thread on the inner wall of the fixed connector through the dust cap, so that the sealing cap is sleeved on the outer walls of the fixed connector and the locking cap. Further, the first sealing ring and the second sealing ring are used to seal the contact positions. In the prior art, the dust cap has no fixed structure and is easily accidentally touched and dropped, and the dust-proof performance cannot be guaranteed. The present invention has the function of waterproof sealing while dust-proof, achieving a good protection effect, and thus can achieve a sealing protection effect when not in use, avoiding external rainwater and dust pollution. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a three-dimensional split structure schematic diagram of the present invention; Figure 2 It is a three-dimensional sectional structure schematic diagram of the present invention; Figure 3 It is a structure schematic diagram of the sealing cap and the dust cap of the present invention; Figure 4 It is a structure schematic diagram of the fixed connector and the optical fiber body of the present invention; Figure 5 It is a left-view sectional structure schematic diagram of the protective hose of the present invention; Figure 6 It is a front-view sectional structure schematic diagram of the protective hose of the present invention.

[0015] In the figure: 1, locking cap; 2, dust cap; 3, fixed joint; 4, protective hose; 401, compression and tensile resistance layer; 402, anti-corrosion layer; 403, self-repairing coating; 5, optical fiber body; 6, first sealing ring; 7, second sealing ring; 8, sealing cap; 9, connecting column; 10, internal thread. Detailed implementation mode

[0016] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0017] Embodiment 1, as Figure 1-2 shown, the present invention provides a technical solution: an optical fiber joint assembly for measuring the rotational speed of an optoelectronic sensor, including a locking cap 1, a dust cap 2, a fixed joint 3 and a protective hose 4. One side of the locking cap 1 is connected to the protective hose 4, and an optical fiber body 5 is arranged inside the protective hose 4. Internal threads 10 are arranged on the inner walls of the fixed joint 3 and the locking cap 1. The side of the locking cap 1 away from the protective hose 4 is threadedly connected to the outer wall of the fixed joint 3 through the internal thread 10. The side of the fixed joint 3 away from the locking cap 1 is threadedly connected to the outer wall of the dust cap 2 through the internal thread 10. A connecting column 9 is installed on one side of the dust cap 2, and a sealing cap 8 passing through the fixed joint 3 and the protective hose 4 is installed on the side of the connecting column 9 away from the dust cap 2. The outer walls of the fixed joint 3 and the locking cap 1 are both provided with a first sealing ring 6 and a second sealing ring 7 through waterproof gel. The inner wall of the sealing cap 8 is closely fitted and adapted to the first sealing ring 6 and the second sealing ring 7. By using threaded connections for the locking cap 1, the fixed joint 3 and the dust cap 2, it has the advantages of convenient installation and maintenance and supports partial replacement and repair. In addition, since the outer surface of the optical fiber is prone to contamination, the rotating sealing cap 8 can be engaged with the internal thread 10 on the inner wall of the fixed joint 3 through the dust cap 2, so that the sealing cap 8 is sleeved on the outer walls of the fixed joint 3 and the locking cap 1. Further, the first sealing ring 6 and the second sealing ring 7 are used to seal the contact positions. Thus, when not in use, a sealing and protection effect can be achieved. In the prior art, the dust cap has no fixed structure and is prone to accidental touch and falling, and the dust-proof performance cannot be guaranteed. The present invention has the functions of dust-proof and waterproof sealing while preventing external rainwater and dust pollution.

[0018] Embodiment 2, as Figure 1-6As shown in the figure, the present invention provides a technical solution: an optical fiber connector assembly for measuring the rotational speed of an optoelectronic sensor, including a protective hose 4 which is a multi-layer composite structure composed of a compressive and tensile layer 401, an anti-corrosion layer 402, and a self-healing coating 403. The compressive and tensile layer 401 is arranged on the inner wall of the anti-corrosion layer 402, and the self-healing coating 403 is coated on the outer wall of the anti-corrosion layer 402. The compressive and tensile layer 401 is a Kevlar fiber and fiberglass mesh cross-woven structure. By adding Kevlar fiber and fiberglass with anti-bending performance outside the protective hose 4, the structure is a mesh weave, which increases the anti-bending performance, can withstand large bends, has the advantage of high mechanical strength, and can effectively protect the optical fiber body 5 from mechanical damage.

[0019] Mesh woven structure: Inner layer Kevlar (axial weaving) + outer layer fiberglass (helical winding); Through epoxy resin impregnation and curing, the interfacial strength is increased by 30% (ASTM D3039 test), and the following is the test standard; Its advantages are: Kevlar bears the main tensile stress, fiberglass provides radial stiffness and cost balance, and through the curing of the mesh structure, the compressive resistance can be increased by 30%.

[0020] The anti-corrosion layer 402 is a protective tube, which can have a diameter of 6×8CM and is made of PU or PFL material, having a good effect of high-temperature and corrosion resistance; The self-healing coating 403 is a waterborne polyurethane resin. After adding an organosilicon additive (such as BYK-410), the passing rate of the scratch test is increased by 30%. It has the effect that scratches on the surface after film formation will not form fractures, and has good scratch resistance and rapid repair. The test standard and method; 1. Sample preparation Scratch generation: Use a standard scratch tester (such as CSM Revetest) or a needle tip (load 5 - 50N, scratch width 10 - 100μm).

[0021] Repair conditions: Thermal repair: Heating at 60°C (such as the South China University of Technology WPUU-5Zn-3 coating).

[0022] 2. Optical microscope parameters Equipment model: Olympus BX53; Observation mode: Magnification, reflected bright field / differential interference contrast (DIC) 50X - 200X; Observation marking: Initial scratch (width ≈ 20μm, depth ≈ 5μm); Repair for 2 hours (the scratch edge is blurred, and the width is reduced to 10μm); Repair for 6 hours (the scratch basically disappears, only slight surface texture remains).

[0023] Observed through an optical microscope, the room temperature self-repair has a repair rate of >85% within 10 hours, the highest scratch resistance level is 4H, and the flexible hose bottom layer is optimized through a waterborne polyurethane resin additive, with both high wear resistance and self-repair capabilities.

[0024] Working principle: Firstly, 10 thin optical fibers are respectively used at the transmitting end and the receiving end. They are coated with glue above the fixed joint 3. The dust cap 2 is threadedly connected to the fixed joint 3, and the fixed joint 3 is threadedly connected to the protective hose 4, which has the advantages of being easy to disassemble and supporting partial replacement and repair. In addition, the protective hose 4 is composed of a compressive and tensile layer 401, an anti-corrosion layer 402, and a self-repair coating 403, with good anti-bending performance, effectively protecting the optical fiber line from mechanical damage, and having good anti-scratch and rapid repair effects. It is suitable for long-term testing use. In an optoelectronic sensor, the optical fiber body 5 is required to quickly transmit optical signals to ensure high-precision speed measurement, reduce the energy loss of optical signals during transmission, ensure the intensity and quality of optical signals, enable the optoelectronic converter to receive stable signals, improve the reliability of speed measurement, be able to adapt to different installation environments and bending radius requirements, and is not easily damaged by bending or stretching, ensuring long-term stable operation.

[0025] Since the outer surface of the optical fiber body 5 is prone to contamination, the rotary sealing cap 8 can be engaged with the internal thread 10 on the inner wall of the fixed joint 3 through the dust cap 2, so that the sealing cap 8 is sleeved on the outer walls of the fixed joint 3 and the locking cap 1. Further, the contact positions are sealed by the first sealing ring 6 and the second sealing ring 7. Thus, when not in use, a sealing and protection effect can be achieved to avoid external rainwater and dust pollution.

[0026] Finally, it should be noted that the above content is only used to illustrate the technical solution of the present invention, rather than limiting the protection scope of the present invention. Any simple modification or equivalent replacement of the technical solution of the present invention by those of ordinary skill in the art does not depart from the essence and scope of the technical solution of the present invention.

Claims

1. An optical fiber connector assembly for measuring the rotational speed of an optoelectronic sensor, comprising a locking cap (1), a dust cap (2), a fixed connector (3) and a protective hose (4), characterized in that: One side of the locking cap (1) is connected with a protective hose (4), and an optical fiber body (5) is arranged inside the protective hose (4). Internal threads (10) are arranged on the inner walls of the fixed joint (3) and the locking cap (1). The side of the locking cap (1) away from the protective hose (4) is threadedly connected to the outer wall of the fixed joint (3) through the internal thread (10). The side of the fixed joint (3) away from the locking cap (1) is threadedly connected to the outer wall of the dust cap (2) through the internal thread (10). First sealing rings (6) and second sealing rings (7) are arranged on the outer walls of the fixed joint (3) and the locking cap (1) through waterproof gel; Among them, the protective hose (4) is a multi-layer composite structure composed of a compressive and tensile layer (401), an anti-corrosion layer (402), and a self-repairing coating (403). The compressive and tensile layer (401) is a Kevlar fiber and fiberglass mesh cross-woven structure.

2. The optical fiber connector assembly for measuring the rotational speed of an optoelectronic sensor according to claim 1, wherein: One side of the dust cap (2) is provided with a connecting column (9), and a sealing cap (8) passing through the fixed joint (3) and the protective hose (4) is installed on the side of the connecting column (9) away from the dust cap (2).

3. The optical fiber connector assembly for measuring the rotational speed of an optoelectronic sensor according to claim 2, wherein: The inner wall of the sealing cap (8) is closely fitted and adapted to the first sealing ring (6) and the second sealing ring (7).

4. The optical fiber connector assembly for measuring the rotational speed of an optoelectronic sensor according to claim 1, characterized in that: The anti-corrosion layer (402) is a PVC protection pipe.

5. The optical fiber connector assembly for measuring the rotational speed of an optoelectronic sensor according to claim 1, characterized in that: The self-repairing coating (403) is a waterborne polyurethane resin.

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