Photoelectric splitter, vehicle-mounted equipment photoelectric distribution system and photoelectric distribution method

Abstract

The invention relates to the technical field of optical fiber communication, in particular to a photoelectric splitter, a vehicle-mounted equipment photoelectric distribution system and a photoelectric distribution method.The photoelectric splitter is characterized by comprising an optical input port, an electric input port, an optical splitter and a photoelectric mixed output port; wherein the photoelectric hybrid output port is provided with an optical insertion core and a pair of electric insertion pins; the optical input port is connected with the optical insertion core through the optical splitter; and the electric input port is connected with the electric pin through a circuit in the photoelectric splitter. Through the photoelectric splitter or the photoelectric distribution scheme provided by the invention, on the basis of not changing the existing vehicle-mounted electric control module and logic, the communication and energy consumption of the terminal equipment can be met, the development difficulty is indirectly reduced, the verification period is shortened, and the development cost is reduced.

Description

Technical Field

[0001] The present disclosure relates to the technical field of optical fiber communication, and in particular to an optoelectronic splitter, an optoelectronic distribution system for vehicle-mounted equipment, and an optoelectronic distribution method. Background Art

[0002] With the rise and development of intelligent networked vehicles in recent years, more and more manufacturers have adopted the "fiber-on-vehicle" solution, that is, installing OLT equipment and ODN links in the car, and transforming cameras, radars, sensors, etc. into devices with optical interfaces. However, the ODN network is a completely passive optical network. In order to meet the power requirements of terminal equipment, manufacturers either use a connection solution of optical-electrical separation of wiring harnesses or interfaces, or use a technical solution of integrating electric control modules at the splitter. However, the costs of the above two solutions are very high. The former also has problems such as large space occupation, and the latter also has problems such as high development difficulty. Summary of the invention

[0003] The present disclosure aims to solve at least one of the technical problems in the above-mentioned technology to a certain extent, and proposes an optoelectronic splitter, comprising:

[0004] Optical input port, electrical input port, optical splitter and optoelectronic hybrid output port; wherein,

[0005] The optical-electric hybrid output port is provided with an optical plug core and a pair of electrical plug pins;

[0006] The optical input port is connected to the optical ferrule through the optical splitter;

[0007] The electrical input port is connected to the electrical pin through the circuit inside the photoelectric splitter.

[0008] Furthermore, at least one positive electrode guide needle and at least one negative electrode guide needle are provided in the electrical input port.

[0009] Furthermore, the electrical input port is provided with a first polarity guide needle and at least one second polarity guide needle, and the polarities of the first polarity guide needle and the second polarity guide needle are opposite.

[0010] Furthermore, the electrical input port is provided with an equal number of positive electrode guide needles and negative electrode guide needles.

[0011] The present disclosure also provides a vehicle-mounted device optoelectronic distribution system, comprising:

[0012] OLT equipment, power control unit, optoelectronic splitter and terminal equipment; among which,

[0013] The optoelectronic splitter comprises: an optical input port, an electrical input port, an optical splitter and an optoelectronic hybrid output port; wherein the optoelectronic hybrid output port comprises an optical plug core and a pair of electrical plug pins; the optical input port is connected to the optical plug core through the optical splitter; the electrical input port is connected to the electrical plug pin through the circuit inside the optoelectronic splitter;

[0014] The optoelectronic splitter is configured to connect the OLT device, the power control unit and the terminal device to achieve optoelectronic hybrid transmission among the OLT device, the power control unit and the terminal device.

[0015] Furthermore, the optoelectronic splitter has at least two optical input ports, and the optoelectronic splitter is configured to be connected to at least one main OLT device.

[0016] Furthermore, the optoelectronic splitter is also configured to be connected to at least one standby OLT device.

[0017] Furthermore, the optoelectronic splitter is connected to the terminal device via an optoelectronic hybrid harness.

[0018] Further, the optical input port of the optoelectronic splitter is connected to the optical interface of the OLT device through a pure light beam or a plurality of pure light beams connected in series;

[0019] The multiple pairs of electrical conduction needles inside the electrical input port of the photoelectric splitter are respectively connected to the electrical interfaces of the power control unit through the electrical harness;

[0020] The optoelectronic hybrid output port of the optoelectronic splitter is connected to the terminal device through an optoelectronic hybrid wire harness.

[0021] The present disclosure also proposes a photoelectric distribution method, which is based on the above-mentioned photoelectric splitter or the above-mentioned vehicle-mounted equipment photoelectric distribution system to achieve photoelectric distribution during photoelectric hybrid transmission.

[0022] Compared with the prior art, the beneficial effects of the present invention are:

[0023] 1. The optoelectronic splitter provided in the present disclosure can realize optoelectronic hybrid output. The optoelectronic hybrid output interface can meet the communication and energy requirements of the terminal equipment, ensuring that the size of each terminal will not increase after adding an optical interface.

[0024] 2. The connection cable from the optoelectronic splitter to the terminal device provided in the present disclosure can adopt an optoelectronic hybrid harness to ensure that the number, weight and required space of the harness will not be increased due to "optical fiber on board".

[0025] 3. Through the optoelectronic distribution solution provided in the present invention, the communication and energy consumption of the terminal equipment can be met without changing the existing on-board electrical control module and logic, which indirectly reduces the development difficulty, shortens the verification cycle, and reduces the development cost.

[0026] Other features and advantages of the present disclosure will be described in the subsequent description, and partly become apparent from the description, or be understood by practicing the present disclosure. The purpose and other advantages of the present disclosure can be realized and obtained by the structures particularly pointed out in the written description and the drawings. The technical solution of the present disclosure is further described below through drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the embodiments of the present disclosure, they are used to explain the present disclosure and do not constitute a limitation of the present disclosure. In the accompanying drawings:

[0028] Figure 1 A schematic diagram of the first existing optical-electrical hybrid transmission;

[0029] Figure 2 is a schematic diagram of a second existing optical-electrical hybrid transmission;

[0030] Figure 3 is a schematic diagram of the third existing optical-electrical hybrid transmission;

[0031] Figure 4 A schematic diagram of an optoelectronic splitter provided in an embodiment;

[0032] Figure 5 A schematic diagram of connecting an optoelectronic splitter to an OLT device provided in an embodiment;

[0033] Figure 6 A schematic diagram of connecting a photoelectric splitter to a power control unit provided in an embodiment;

[0034] Figure 7 A schematic diagram of connecting a photoelectric splitter to a terminal device provided in an embodiment;

[0035] Figure 8 A schematic diagram of an optoelectronic splitter connected to an OLT device, a power control unit and a terminal device according to an embodiment;

[0036] Fig. 9 A schematic diagram of an on-board device optoelectronic distribution system provided in an embodiment;

[0037] Figure numerals: 1. OLT device; 2. Power control unit; 3. Optical splitter; 301. Splitter; 302. Connection circuit; 303. Optical input port; 304. Electrical input port; 3041. Positive guide pin of input port; 3042. Negative guide pin of input port; 305. Optical-electrical hybrid output port; 3051. Positive guide pin of output port; 3052. Negative guide pin of output port; 3053. Optical plug; 4. Terminal device; 5. Light beam; 6. Optical-electrical hybrid wiring harness; 7. Electrical wiring harness. DETAILED DESCRIPTION

[0038] The present disclosure is described below in conjunction with the accompanying drawings. The preferred embodiments described herein are only used to illustrate and explain the present disclosure and are not used to limit the present disclosure.

[0039] Traditional in-vehicle communications usually use coaxial cables, twisted pair cables, etc. as transmission media, which transmit electrical signals, and use LIN, CAN, and Ethernet structures as communication architectures for signal transmission and exchange.

[0040] However, with the rise and development of intelligent connected vehicles in recent years, the number of sensors and cameras in the car has increased significantly. Car manufacturers have gradually realized that traditional coaxial cables and twisted pair cables will not be able to meet the network latency and bandwidth requirements of applications such as autonomous driving and OTA upgrades of intelligent connected vehicles. Therefore, major car manufacturers are looking for new in-car communication solutions.

[0041] In this context, "fiber optics on board" has gradually entered the vision of major manufacturers. "Fiber optics on board" will use optical fiber to replace the original coaxial cable and twisted pair as a new transmission medium, and use optical signals instead of electrical signals to achieve signal transmission between terminals such as cameras, laser radars, sensors, etc. in the car and the central computing platform on the car. The "fiber optics on board" solution will greatly increase the bandwidth of in-car communications and reduce latency.

[0042] At present, the more mainstream "fiber-to-the-car" communication architecture in China is to transplant the PON network architecture of fiber-to-the-home to the vehicle environment, set up OLT equipment and ODN links (including cables, connectors, splitters) in the car, and transform cameras, radars, sensors, etc. into devices with optical interfaces to realize optical signal communication between each terminal and OLT.

[0043] However, the ODN network is a completely passive optical network and cannot provide power to the above-mentioned terminal devices, requiring additional power supply and electrical control interfaces.

[0044] At present, there are mainly the following optoelectronic hybrid transmission solutions in the industry:

[0045] like Figure 1As shown, the first method is that the terminal provides two interfaces, an optical interface and an electrical interface. The optical interface is connected to the ODN link, and the electrical interface is connected to the original electrical control circuit. The original electrical control link and electrical control equipment can realize the electrical on and off of the terminal and the power control. The advantage of this solution is that the original electrical control link, electrical control equipment, etc. can be shared, and there is no need to make major changes to the original electrical control link or equipment, which minimizes the cost, risk, and increase in development cycle caused by changing the electrical control link. However, the disadvantages of this solution are also obvious. In the past, terminals, such as cameras, can use a coaxial cable to simultaneously realize the power supply and signal transmission of the camera. However, after adopting this method, the number of cables will double, which will cause the cables to occupy more space in the car and bring an additional greater weight of the wiring harness. Moreover, too many wiring harnesses also increase the production cost. At the same time, this solution will greatly increase the size of the terminal due to the need to set two interfaces on the terminal. On some small terminals, such as cameras, this method will become unrealistic.

[0046] like Figure 2 As shown in the figure, the second method is that the terminal provides an optical-electric hybrid interface, and on the harness connector close to the terminal (or in the middle of the harness), the optical fiber and the wire are mixed into a cable, and the optical signal and power are transmitted to the terminal through an optical-electric hybrid plug. This solution solves the problem of increased terminal size caused by the two interfaces in the first solution to a certain extent, but at the front end of the link, both optical and electrical links are still required, and the space, weight, and cost issues mentioned in the above solution still exist.

[0047] like Figure 3 As shown, the third method is to transform the circuits and electronic control equipment on the original vehicle, integrate the electronic control equipment into the splitter in the ODN link, transform the splitter into an optoelectronic splitter, and the output port of the splitter is an optoelectronic hybrid port, which is connected to the terminal device through an optoelectronic hybrid cable. The splitter not only realizes the splitting function, but also realizes the distribution management of power supply. This method can solve the problem of excessive terminal size caused by the above two solutions, and to a certain extent solves the problem of space shortage, heavy weight and high cost caused by too many wiring harnesses brought by optoelectronic separated cables and optical cables. However, this solution requires all the electrical control modules and circuits that have been used before to be changed, and the electrical control module needs to be integrated into the splitter. The development of the new optoelectronic splitter is more difficult, the verification cycle is longer, and the cost and risk are also higher.

[0048] The above existing technologies currently either need to use optoelectronic separated wiring harnesses or interfaces, which results in too many wiring harnesses, large space occupation, time-consuming and labor-intensive installation, high cost, or too large terminal size. Or they need to integrate the electric control module at the splitter, which results in difficult development, long verification time, high cost, and high risk.

[0049] In order to solve the problems of the prior art, the present invention proposes a photoelectric splitter, a vehicle-mounted device photoelectric distribution system and a photoelectric distribution method. Figure 4-Figure 9 The technical solution provided in the present disclosure is further elaborated.

[0050] like Figure 4 As shown, the optoelectronic splitter 3 provided in the present disclosure includes: an optical input port 303, an electrical input port 304, a splitter 301 and an optoelectronic hybrid output port 305; wherein the optoelectronic hybrid output port 305 has an optical plug core 3053 and a pair of electrical plug pins; the optical input port 303 is connected to the optical plug core 3053 through the splitter 301; the electrical input port 304 is connected to the electrical plug pins through the circuit inside the optoelectronic splitter 3.

[0051] According to some embodiments of the present disclosure, the input port of the optoelectronic splitter 3 is divided into an optical input port 303 and an electrical input port 304 , and the output port is an optoelectronic hybrid output port 305 . The optoelectronic splitter 3 is internally provided with an optical splitter 301 and a connecting circuit 302 .

[0052] Furthermore, the optoelectronic splitter 3 has at least two optical input ports 303 .

[0053] According to some embodiments of the present disclosure, the optoelectronic splitter 3 has at least two optical input ports 303 , one or more of which are used for main input and the rest are used as backup input.

[0054] Further, the number of input ports of the optical splitter 301 is not less than the number of optical input ports 303 of the optoelectronic splitter 3 .

[0055] According to some embodiments of the present disclosure, the splitter 301 in the optoelectronic splitter 3 has multiple input ports for connecting to the optical input port 303 outside the optoelectronic splitter 3. To meet the needs of the optoelectronic splitter, the number of input ports of the splitter 301 is at least greater than the number of optical input ports 303 of the optoelectronic splitter 3.

[0056] Furthermore, at least one positive electrode guide needle and at least one negative electrode guide needle are disposed in the electrical input port 304 .

[0057] According to some embodiments of the present disclosure, the electrical input port 304 has at least one input positive guide needle 3041 and at least one input negative guide needle 3042 or similar structures to realize the input of electrical energy into the optoelectronic splitter 3. The input positive guide needle 3041 and the input negative guide needle 3042 of the electrical input port 304 are connected to the output positive guide needle 3051 and the output negative guide needle 3052 in the optoelectronic hybrid output port 305 through the connecting circuit 302 inside the splitter.

[0058] Furthermore, a first polarity guide needle and at least one second polarity guide needle are provided in the electrical input port 304 , and the polarities of the first polarity guide needle and the second polarity guide needle are opposite.

[0059] According to some embodiments of the present disclosure, multiple input port positive guide needles 3041 or multiple input port negative guide needles 3042 can be combined into one guide needle or wire to reduce the number of input wires. For example, five power supply guide needles can be provided in the power input port 304, one of which is the input port positive guide needle 3041, and the other four are the input port negative guide needles 3042, and the four negative guide needles share one positive guide needle.

[0060] Furthermore, the power input port 304 is provided with the same number of positive electrode guide needles and negative electrode guide needles.

[0061] According to some other embodiments of the present disclosure, the electrical input port 304 of the photoelectric splitter 3 is provided with a pair of input port positive electrode guide needles 3041 and input port negative electrode guide needles 3042 .

[0062] The present disclosure also provides a vehicle-mounted device optoelectronic distribution system, comprising:

[0063] OLT device 1, power control unit 2, optoelectronic splitter 3 and terminal device 4; wherein the optoelectronic splitter 3 comprises: an optical input port 303, an electrical input port 304, a splitter 301 and an optoelectronic hybrid output port 305; the optical input port 303 is connected to the optoelectronic hybrid output port 305 through the splitter 301; the electrical input port 304 is connected to the optoelectronic hybrid output port 305; the splitter is configured to connect the OLT device 1, the power control unit 2 and the terminal device 4, so as to realize optoelectronic hybrid transmission among the OLT device 1, the power control unit 2 and the terminal device 4.

[0064] Figure 5 A schematic diagram of the connection between the photoelectric splitter 3 and the OLT device 1, the power control unit 2 and the terminal device 4 in the photoelectric distribution system of the vehicle-mounted device is given as an embodiment. Figure 6-Figure 8 The connection scheme and working principle of the optoelectronic splitter 3 with the OLT device 1, the terminal device 4 or the power control unit 2 are further explained.

[0065] Furthermore, the optical / electrical splitter 3 has at least two optical input ports 303 , and the optical / electrical splitter 3 is configured to connect at least one main OLT device and at least one backup OLT device.

[0066] According to some embodiments of the present disclosure, Figure 6As shown, the optoelectronic splitter 301 has two optical input ports 303, one of which is connected in series to the optical interface of the main OLT device 1 through one or more pure light beams 5, and the other pure light input port 303 is connected to the optical interface of the backup OLT device 1 through another one or more pure light beams 5.

[0067] Furthermore, the optoelectronic splitter 3 is connected to the terminal device 4 via an optoelectronic hybrid harness 6 .

[0068] According to some embodiments of the present disclosure, Figure 7 As shown, the optoelectronic hybrid interface of the optoelectronic splitter 3 is connected to the terminal device 4 through one or more optoelectronic hybrid wire harnesses 6 .

[0069] According to some implementations of the present disclosure, Figure 8 As shown, four pairs of electrical conduction needles (four positive conduction needles 3041 and four negative conduction needles 3042) inside the electrical input port 304 of the photoelectric splitter 301 are connected to the power control unit 2 through the wiring harness 7 to realize the power supply and power control management of each line.

[0070] According to other embodiments of the present disclosure, Fig. 9 As shown, the complete architecture of the on-board equipment optoelectronic distribution system corresponding to the PON line includes: (1) optical line terminal equipment 4 (OLT equipment 1): realizes the optical signal distribution, control and management of each terminal equipment 4; (2) power control unit 2: realizes the power distribution, control and management of each terminal; (3) optoelectronic splitter 3: the input port is divided into an optical input port 303 and an electrical input port 304, and the output port is an optoelectronic hybrid output port 305, which is internally provided with a splitter 301 and a connecting circuit 303; (4) terminal equipment 4: such as an optical fiber camera, etc., has an optoelectronic hybrid port, through which the transmission of optical signals and the input of electrical energy are realized; (5) optical bundle 5: includes an optical cable and an optical fiber plug. Both ends of the optical cable are provided with plugs. Depending on the use node, some wiring bundles are male plugs at one end and female plugs at the other end, and some are double-ended male plugs or double-ended female plugs. Realize the connection between the OLT device 1 and the optical input port 303 of the optoelectronic splitter 301; (6) Wire harness 7: including multiple cables and multiple wire plugs, both ends of the cables are provided with plugs. Depending on the use node, some wire harnesses have a male plug at one end and a female plug at one end, and some have a double-ended male plug or a double-ended female plug. Realize the connection between the OLT device 1 and the optoelectronic input port 304 of the optoelectronic splitter 301; (7) Optoelectronic hybrid wire harness 6: including an optoelectronic hybrid cable and an optoelectronic hybrid plug. Both ends of the optoelectronic hybrid cable are provided with plugs. Depending on the use node, some wire harnesses have a male plug at one end and a female plug at one end, and some have a double-ended male plug or a double-ended female plug, to realize the connection between the output port of the optoelectronic splitter 3 and the terminal input port.

[0071] There may be one or more optical line terminals. If there are more than one, the function of one master and multiple backups can be realized, and the splitter also uses two or more optical input ports 303 accordingly. This embodiment uses two OLT devices 1, one master and one backup, and one power control unit 2. In addition, five 2:4 optoelectronic splitters 301 are used in the link to connect up to 20 terminal devices 4. Each optoelectronic splitter 301 is internally provided with a 2:4 splitter 301, two optical input ports 303, four optoelectronic hybrid output ports 305, and an internal connection circuit 302. Each splitter 301 is provided with four optoelectronic hybrid interfaces, and each optoelectronic hybrid output port has a pair of electrical pins (output port positive guide pin 3051 and output port negative guide pin 3052) and an optical plug core 3053. The splitter 301 has two optical fiber inputs, one master and one backup, and the two optical fibers are respectively connected to the two pure optical input ports 303 outside the optoelectronic splitter 3. The optical splitter 301 has four optical fiber outputs, which are respectively connected to the optical ferrule 3053 in the optical-electric hybrid interface. The optical-electric splitter 301 has two optical input ports 303, one main and one backup, one of which is connected to the optical interface of the main OLT device 1 in series through one or more light beams 5, and the other optical input port 303 is connected to the optical interface of the backup OLT device 1 through another one or more light beams 5.

[0072] The present disclosure also proposes a photoelectric distribution method, which realizes photoelectric distribution during photoelectric hybrid transmission based on the above-mentioned photoelectric splitter or the above-mentioned on-vehicle device photoelectric distribution system.

[0073] It is obvious that a person skilled in the art can make various changes and modifications to the present disclosure without departing from the spirit and scope of the present disclosure. Thus, if these modifications and variations of the present disclosure fall within the scope of the claims of the present disclosure and their equivalents, the present disclosure is also intended to include these modifications and variations.

Claims

1. A photoelectric splitter, characterized in that: include: Optical input port, electrical input port, optical splitter and optoelectronic hybrid output port; wherein, The optical-electric hybrid output port is provided with an optical plug core and a pair of electrical plug pins; The optical input port is connected to the optical ferrule through the optical splitter; The electrical input port is connected to the electrical pin through the circuit inside the photoelectric splitter.

2. The photoelectric splitter according to claim 1, characterized in that: At least one positive electrode guide needle and at least one negative electrode guide needle are arranged in the electrical input port.

3. The photoelectric splitter according to claim 2, characterized in that: The electrical input port is provided with a first polarity guide needle and at least one second polarity guide needle, and the polarities of the first polarity guide needle and the second polarity guide needle are opposite.

4. The photoelectric splitter according to claim 2, characterized in that: The electrical input port is provided with an equal number of positive electrode guide needles and negative electrode guide needles.

5. A photoelectric distribution system for vehicle-mounted equipment, characterized in that: include: OLT equipment, power control unit, optoelectronic splitter and terminal equipment; among which, The optoelectronic splitter comprises: an optical input port, an electrical input port, an optical splitter and an optoelectronic hybrid output port; wherein the optoelectronic hybrid output port comprises an optical plug core and a pair of electrical plug pins; the optical input port is connected to the optical plug core through the optical splitter; the electrical input port is connected to the electrical plug pin through the circuit inside the optoelectronic splitter; The optoelectronic splitter is configured to connect the OLT device, the power control unit and the terminal device to achieve optoelectronic hybrid transmission among the OLT device, the power control unit and the terminal device.

6. The on-vehicle device optoelectronic distribution system according to claim 5, characterized in that: The optoelectronic splitter has at least two optical input ports, and the optoelectronic splitter is configured to be connected to at least one main OLT device.

7. The on-vehicle device optoelectronic distribution system according to claim 6, characterized in that: The optoelectronic splitter is also configured to be connected to at least one standby OLT device.

8. The on-vehicle device optoelectronic distribution system as claimed in claim 5, characterized in that: The optoelectronic splitter is connected to the terminal device via an optoelectronic hybrid wire harness.

9. The on-vehicle device optoelectronic distribution system according to claim 5, characterized in that: The optical input port of the optoelectronic splitter is connected to the optical interface of the OLT device through a pure light beam or a plurality of pure light beams connected in series; The multiple pairs of electrical conduction needles inside the electrical input port of the photoelectric splitter are respectively connected to the electrical interfaces of the power control unit through the electrical harness; The optoelectronic hybrid output port of the optoelectronic splitter is connected to the terminal device through an optoelectronic hybrid wire harness.

10. A photoelectric distribution method, characterized in that: Based on the optoelectronic splitter described in any one of claims 1 to 4 or the optoelectronic distribution system for vehicle-mounted equipment described in any one of claims 5 to 9, optoelectronic distribution during optoelectronic hybrid transmission is achieved.

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