Photoelectric conversion device

Abstract

The utility model provides a photoelectric conversion device which comprises an optical fiber cable, a cable, a photoelectric sensor, an optical fiber connector, a fixing mechanism, a ceramic ferrule and a shell, the cable is electrically connected with the photoelectric sensor, the photoelectric sensor is fixedly connected with the optical fiber connector, one end of the ceramic ferrule is inserted into the fixing mechanism and is in interference fit with the fixing mechanism, and the other end of the ceramic ferrule is inserted into the optical fiber connector. One end of the optical fiber cable penetrates through the fixing mechanism to be inserted into the ceramic ferrule, and the shell wraps the fixing mechanism, the ceramic ferrule, the optical fiber connector and the photoelectric sensor to be sealed and fixed. The photoelectric sensor is utilized to realize mutual conversion of optical signals and electric signals, and meanwhile, the shell tightly wrapping internal parts is utilized to realize good vibration resistance and waterproof performance.

Description

Technical Field

[0001] The utility model relates to the field of photoelectric conversion, in particular to a photoelectric conversion device. Background Art

[0002] With the rapid development of the automotive industry and the rapid rise of intelligent driving and assisted driving, when the external recognition sensors such as radars or cameras located on the vehicle body identify relevant information during actual operation, they need to be quickly, safely and stably transmitted to the vehicle control system in order to accurately make corresponding judgments and processing methods. At this time, it is particularly important to transmit automotive electronic information quickly, safely and stably. However, conventional cables transmit information using electric current, which is relatively slow. Long-distance transmission is prone to signal attenuation and is easily affected by other surrounding electrical signals, and the stability is relatively poor.

[0003] Optical fiber transmission signals are transmitted by light, which is very fast. The data transmission speed can reach millions of bits per second, and there will be no signal attenuation due to the influence of electrical signals. It has excellent signal transmission stability. At the same time, optical fiber (optical cable) is more heat-resistant, corrosion-resistant, and has a long service life. The above-mentioned identification sensors and control systems such as radars or cameras are electrical signal devices, and optical fiber transmission is an optical signal device. At the same time, the actual working environment of the car is relatively harsh, and has high requirements for vibration, waterproofness, and reliability. Utility Model Content

[0004] Based on the defects existing in the prior art, the utility model provides a photoelectric conversion device, including an optical fiber cable, an electrical cable, a photoelectric sensor, an optical fiber connector, a fixing mechanism, and an outer shell. The cable is electrically connected to the photoelectric sensor, and the photoelectric sensor is fixedly connected to the optical fiber connector. The core of the optical fiber cable passes through the fixing mechanism and is inserted into the optical fiber connector. The outer shell wraps the fixing mechanism, the core of the optical fiber cable, and the optical fiber connector for sealing and fixing.

[0005] Furthermore, it also includes a ceramic ferrule, one end of which is inserted into the fixing mechanism and interference fit, and the other end is inserted into the optical fiber connector; the ceramic ferrule is provided with a through hole, and the core of the optical fiber cable passes through the fixing mechanism and is inserted into the through hole.

[0006] Furthermore, the photoelectric sensor is inserted into the optical fiber connector and is coaxially arranged, and the outer wall of the optical fiber sensor is fixed to the optical fiber connector by glue.

[0007] Furthermore, the shell is solid, wrapping the fixing mechanism, the ceramic ferrule, the optical fiber connector and the photoelectric sensor, and the two ends are respectively integrated with the optical fiber cable and the electrical cable.

[0008] Furthermore, the shell is hollow, and is filled with a buffer inside to wrap the fixing mechanism, the ceramic ferrule, the optical fiber connector and the photoelectric sensor. The two ends of the shell are fixedly connected to the optical fiber cable and the electrical cable respectively.

[0009] Furthermore, waterproof rings are provided at the connection points between the two ends of the shell and the optical fiber cable and the electric cable.

[0010] Furthermore, the optical fiber connector is made of polyetherimide.

[0011] Furthermore, a lens component for focusing light is provided at the central axis of the side where the optical fiber connector is connected to the photoelectric sensor.

[0012] Furthermore, an optical fiber introduction hole is provided at one end of the ceramic ferrule inserted into the fixing mechanism, and the optical fiber introduction hole is communicated with the through hole of the ceramic ferrule.

[0013] Furthermore, the optical fiber introduction hole is in a conical shape, and its inner diameter gradually increases in a direction away from the through hole of the ceramic ferrule.

[0014] Furthermore, the outer wall of the fixing mechanism is arranged in a stepped shape.

[0015] Furthermore, the optical signal transmitted by the photoelectric conversion device adopts one of the 850nm band, the 970nm band, and the 650nm band;

[0016] The light source of the photoelectric conversion device adopts a vertical cavity surface emitting laser, and the vertical cavity surface emitting laser is used to convert an electrical signal into an optical signal.

[0017] Beneficial effects:

[0018] The technical solution of the utility model is to form an optical fiber cable, a fixing mechanism and a ceramic ferrule into a whole, the ceramic ferrule is inserted into the fixing mechanism and interference fit, the core of the optical fiber cable passes through the fixing mechanism and the ceramic ferrule and the end face is flush with the end face of the ceramic ferrule, and then they are inserted as a whole into an optical fiber connector made of PET, the optical fiber connector and the photoelectric sensor are fixed by glue to prevent foreign matter from entering the internal cavity, and then the fixing mechanism, the optical fiber connector, the photoelectric sensor and part of the optical fiber cable and the cable are wrapped as a whole by a solid shell, so as to fix the internal components of the photoelectric conversion device, and at the same time have good vibration resistance and waterproof performance.

[0019] By adjusting the matching dimensions of the optical fiber connector and the photoelectric sensor, the central axes of the two are aligned. At the same time, due to the high temperature resistance and stable dimensional performance of the optical fiber connector, the ceramic ferrule and the fiber core inserted into the optical fiber connector remain aligned with the central axis of the optical fiber connector, thereby achieving photoelectric conversion while reducing light loss due to high coaxiality. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The following drawings are only used to illustrate and explain the present invention, and do not limit the scope of the present invention.

[0021] Figure 1 This is a schematic diagram of an optoelectronic assembly without a housing according to an embodiment of the utility model.

[0022] Figure 2 It is an overall cross-sectional schematic diagram of an embodiment of the utility model.

[0023] Explanation of the accompanying drawings: 1. optical fiber cable; 2. fixing mechanism; 3. ceramic ferrule; 4. cable; 5. photoelectric sensor; 6. optical fiber connector; 7. glue; 8. housing; 9. waterproof ring; 10. lens component; 11. optical fiber introduction hole. DETAILED DESCRIPTION

[0024] In order to have a clearer understanding of the technical features, purposes and effects of this invention, the specific implementation methods of the present invention are now described with reference to the accompanying drawings. The same reference numerals in each figure represent the same parts. In order to make the drawings concise, the parts related to the present invention are schematically shown in each figure, and do not represent the actual structure of the product. In addition, in order to make the drawings concise and easy to understand, in some figures, only one of the parts with the same structure or function is schematically drawn or marked.

[0025] In the present invention, "connection" may include direct connection, indirect connection, communication connection, and electrical connection, unless otherwise specified.

[0026] The terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure. As used herein, the singular forms "one", "a kind of", and "the" are intended to also include plural forms, unless the context clearly stipulates otherwise. It will also be understood that when used in the specification, the terms "include" and / or "comprising" refer to the presence of stated features, numerical values, steps, operations, elements and / or components, but do not exclude the presence or additional addition of one or more other features, numerical values, steps, operations, elements, components and / or the group of its composition. As used in this article, the term "and / or" includes any and all combinations of one or more of the related items listed.

[0027] The utility model provides a photoelectric conversion device, such as Figure 1 As shown, it includes an optical fiber connector 6 and a photoelectric sensor 5, and the photoelectric sensor 5 is electrically connected to the cable 4. In this embodiment, if the optical signal needs to be converted into an electrical signal, the photoelectric sensor 5 is a photodiode, and if the electrical signal needs to be converted into an optical signal, the photoelectric sensor 5 is a laser diode. The photoelectric diode or the laser diode is integrally packaged with the cable 4.

[0028] The photoelectric conversion device also includes a light source. In this embodiment, the light source adopts a vertical cavity surface emitting laser, which is used to convert an electrical signal into an optical signal. The optical signal adopts one of the 850nm band, the 970nm band, and the 650nm band.

[0029] like Figure 2 As shown, the end of the photoelectric sensor 5 away from the cable 4 is inserted into the interface of the optical fiber connector 6. A lens component 10 for focusing light is provided at the central axis of the interface of the optical fiber connector 6. The matching dimensions of the photoelectric sensor 5 and the optical fiber connector 6 are adjusted so that the central axis of the photoelectric sensor 5 is aligned with the lens component 10, thereby reducing light loss during photoelectric conversion.

[0030] The optical fiber connector 6 is made of polyetherimide (PEI) which is resistant to high temperatures, has stable dimensional properties, and has high strength and rigidity, thereby further reducing the possibility of deformation of the optical fiber connector 6 and ensuring the coaxiality of the optical fiber connector 6 and the photoelectric sensor 5 .

[0031] After the photoelectric sensor 5 is inserted into the optical fiber connector 6, glue 7 is filled between the outer wall of the photoelectric sensor 5 and the inner wall of the optical fiber connector 6 to achieve a fixed connection between the photoelectric sensor 5 and the optical fiber connector 6, while preventing foreign matter from entering the internal cavity of the optical fiber connector 6.

[0032] A slot is provided along the central axis of the optical fiber connector 6 at the center of the other end away from the photoelectric sensor 5, and a ceramic ferrule 3 is inserted into the slot. The ceramic ferrule 3 is a small ceramic tube made of nano zirconium oxide (ZrO2) through several processes such as raw material mixing and granulation, injection molding, high temperature sintering and precision grinding. It is widely used in optical fiber connectors, and is partially used in optical active devices and other optical passive devices. It provides precise positioning for optical fiber docking and is the core component of optical fiber connection.

[0033] The ceramic ferrule 3 includes a cylindrical ferrule body, a through hole is opened along the axis of the ferrule body, and the ferrule body includes an end portion and a tail portion, the end portion is inserted into the slot of the optical fiber connector 6, and the end face of the end portion is provided with a chamfer, and in this embodiment, the chamfer is 40°. Under the premise of ensuring the connection performance, by increasing the chamfer of the end of the ferrule body to 40°, the grinding area of ​​the end face is reduced, the grinding time is shortened, and the loss of grinding sandpaper is reduced, which saves labor time and reduces costs.

[0034] The tail of the ceramic ferrule 3 is provided with an optical fiber introduction hole 11 along the central axis. The optical fiber introduction hole 11 is connected to the through hole of the ceramic ferrule 3. The connection between the optical fiber introduction hole 11 and the through hole is transitioned by a rounded corner. In this embodiment, the radius of the rounded corner is preferably 2.5 mm. The optical fiber introduction hole 11 is conical, and its inner diameter gradually increases in the direction away from the through hole of the ceramic ferrule 3. The optical fiber cable 1 can be easily inserted into the ceramic ferrule 3 by using the optical fiber introduction hole 11. At the same time, since the connection between the optical fiber introduction hole 11 and the through hole has a smooth transition without dead angles, when the core of the optical fiber cable 1 is inserted into the ceramic ferrule 3, the core can avoid fiber breakage when passing through the connection, thereby improving the success rate of optical fiber insertion.

[0035] The optical fiber cable 1 includes a fiber core, a fiber cladding, and a protective layer. The fiber core is the main part of the optical signal transmission and is made of a material with a high refractive index. The optical signal transmitted in the fiber core will be transmitted forward along the optical axis in continuous reflection and refraction. The fiber cladding is a layer of material located outside the fiber core and is made of a material with a lower refractive index. Its main function is to protect the fiber core and prevent the optical signal from being scattered and lost. The protective layer is a layer of material located outside the fiber cladding, usually made of a polymer material. Its main function is to protect the optical fiber from mechanical damage and environmental influences.

[0036] When inserting the optical fiber cable 1 into the ceramic ferrule 3, it is necessary to strip the optical fiber cladding and protective layer of the inserted part of the optical fiber cable 1, and only insert the fiber core into the ceramic ferrule 3. Therefore, the portion of the optical fiber cable 1 at the opening of the optical fiber introduction hole 11 is very fragile. In order to protect the fiber core of the optical fiber cable 1, a fixing mechanism 2 is sleeved on the outside of the connection between the optical fiber cable 1 and the ceramic ferrule 3. In this embodiment, the fixing mechanism 2 is provided with a through threading hole along its axis, the ceramic ferrule 3 is inserted into the threading hole, and the end of the ceramic ferrule 3 is then inserted into the slot of the optical fiber connector 6, and the tail of the ceramic ferrule 3 is interference fit with the threading hole, thereby realizing a fixed connection between the ceramic ferrule 3 and the fixing mechanism 2.

[0037] At this time, the fiber core of the optical fiber cable 1 with the outer layer stripped off is inserted into the ceramic ferrule 3, and the end face of the fiber core is flush with the end face of the ceramic ferrule 3, and the intersection of the fiber core and the optical fiber cable 1 with the outer layer is against the wall of the optical fiber introduction hole 11, and the fixing mechanism 2 is used to limit the twisting deformation of the optical fiber cable 1, thereby protecting the fiber core and ensuring the coaxiality of the optical fiber cable 1 and the ceramic ferrule 3.

[0038] The photoelectric conversion device further comprises a housing 8 which encloses the fixing mechanism 2 , the ceramic ferrule 3 , the optical fiber connector 6 , and the photoelectric sensor 5 , and the optical fiber cable 1 and the electrical cable 4 extend out from two ends of the housing 8 , respectively.

[0039] In one embodiment, the outer shell 8 is solid and is made by injection molding or gluing. Its two ends are integrated with the optical fiber cable 1 and the cable 4 respectively. The fixing mechanism 2, the ceramic ferrule 3, the optical fiber connector 6, and the photoelectric sensor 5 are tightly wrapped and fixed inside, thereby ensuring that the photoelectric conversion device has good vibration resistance and waterproof performance while realizing the mutual conversion of optical and electrical signals, and has a compact shape and volume, and is portable and practical.

[0040] In another embodiment, the outer shell 8 is hollow and also wraps around the outside of the fixing mechanism 2, the ceramic ferrule 3, the optical fiber connector 6, and the photoelectric sensor 5. Because the ceramic ferrule 3 is free to move relative to the optical fiber connector 6, when the optical fiber cable 1 is inserted into the fixing mechanism 2 and the ceramic ferrule 3, the optical fiber cable 1 is also free to move relative to the fixing mechanism 2 and the ceramic ferrule 3. In order to achieve their fixation, a buffer is filled inside the outer shell 8, and the fixing mechanism 2, the ceramic ferrule 3, the optical fiber connector 6, and the photoelectric sensor 5 are tightly wrapped with the buffer.

[0041] At the same time, waterproof rings 9 are provided at both ends of the housing 8 connected to the optical fiber cable 1 and the cable 4. In this embodiment, the waterproof ring 9 is a rubber sealing ring, which is respectively sleeved at the connection between the optical fiber cable 1 and the cable 4 and the housing 8. When the housing 8 is sleeved outside the fixing mechanism 2 and other components, the two ends of the housing 8 will clamp the corresponding rubber sealing rings, and then glue is filled at the connection between the rubber sealing ring and the housing 8, the optical fiber cable 1, and the cable 4 to achieve overall fixation and ensure the waterproof performance of the photoelectric conversion device.

[0042] Because the fixing mechanism 2, ceramic ferrule 3, optical fiber connector 6, and photoelectric sensor 5 are fixed relative to the shell 8 by wrapping the filler inside the shell 8, in order to further enhance the fixation and vibration resistance performance, the outer wall of the fixing mechanism 2 is arranged in a stepped shape, thereby increasing the contact area between the outer wall of the fixing mechanism 2 and the inside of the shell 8, increasing the friction force, limiting the axial movement of the fixing mechanism 2, and ensuring that the components do not move relative to each other inside the shell 8.

[0043] The above is only a preferred embodiment of the present invention, and the present invention is not limited to the above embodiment. It is clear to those skilled in the art that the form in the embodiment is not limited thereto, and the adjustable manner is not limited thereto. It is understood that other improvements and changes directly derived or associated with by those skilled in the art without departing from the basic concept of the present invention should be considered to be included in the protection scope of the present invention.

Claims

1. A photoelectric conversion device, characterized in that: It includes an optical fiber cable, an electrical cable, a photoelectric sensor, an optical fiber connector, a fixing mechanism, and an outer shell. The cable is electrically connected to the photoelectric sensor, the photoelectric sensor is fixedly connected to the optical fiber connector, the core of the optical fiber cable passes through the fixing mechanism and is inserted into the optical fiber connector, and the outer shell wraps the fixing mechanism, the core of the optical fiber cable, and the optical fiber connector for sealing and fixing.

2. A photoelectric conversion device according to claim 1, characterized in that: It also includes a ceramic ferrule, one end of which is inserted into the fixing mechanism and interference fit, and the other end is inserted into the optical fiber connector; the ceramic ferrule is provided with a through hole, and the core of the optical fiber cable passes through the fixing mechanism and is inserted into the through hole.

3. A photoelectric conversion device according to claim 1, characterized in that: The photoelectric sensor is inserted into the optical fiber connector and is coaxially arranged, and the outer wall of the optical fiber sensor is fixed to the optical fiber connector by glue.

4. A photoelectric conversion device according to claim 2, characterized in that: The shell is solid and wraps the fixing mechanism, the ceramic ferrule, the optical fiber connector and the photoelectric sensor. The two ends of the shell are respectively integrated with the optical fiber cable and the electrical cable.

5. A photoelectric conversion device according to claim 2, characterized in that: The shell is hollow, and is filled with a buffer inside to wrap the fixing mechanism, the ceramic ferrule, the optical fiber connector and the photoelectric sensor. The two ends of the shell are fixedly connected to the optical fiber cable and the electrical cable respectively.

6. A photoelectric conversion device according to claim 5, characterized in that: Waterproof rings are arranged at the connection places between the two ends of the shell and the optical fiber cable and the electric cable.

7. A photoelectric conversion device according to claim 1, characterized in that: The optical fiber connector is made of polyetherimide.

8. A photoelectric conversion device according to claim 1, characterized in that: A lens component for focusing light is arranged at the central axis of the side where the optical fiber connector is connected to the photoelectric sensor.

9. A photoelectric conversion device according to claim 2, characterized in that: An optical fiber introduction hole is provided at one end of the ceramic ferrule inserted into the fixing mechanism, and the optical fiber introduction hole is communicated with the through hole of the ceramic ferrule.

10. A photoelectric conversion device according to claim 9, characterized in that: The optical fiber introduction hole is in a cone shape, and its inner diameter gradually increases in a direction away from the through hole of the ceramic ferrule.

11. A photoelectric conversion device according to claim 1, characterized in that: The outer wall of the fixing mechanism is arranged in a stepped shape.

12. The photoelectric conversion device according to claim 1, characterized in that: The optical signal transmitted by the photoelectric conversion device adopts one of the 850nm band, the 970nm band and the 650nm band; The light source of the photoelectric conversion device adopts a vertical cavity surface emitting laser, and the vertical cavity surface emitting laser is used to convert an electrical signal into an optical signal.

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