Power supply and communication circuit for front-view camera and vehicle-mounted front-view system

Abstract

The embodiment of the utility model provides a power supply and communication circuit for a foresight camera and a vehicle-mounted foresight system. The circuit comprises a first coaxial line port, a second coaxial line port and a power supply circuit, a second coaxial line port; a first coaxial line; a third coaxial line port; a fourth coaxial line port; a second coaxial line; the first one-way conduction switch is arranged between the second coaxial line port and the power management module and used for controlling the connection and disconnection between the second coaxial line port and the power management module, and when the first one-way conduction switch is conducted, current is allowed to flow from the second coaxial line port to the power management module in a one-way mode; the second one-way conduction switch is arranged between the fourth coaxial line port and the power management module and used for controlling connection and disconnection between the fourth coaxial line port and the power management module, and when the second one-way conduction switch is conducted, current is allowed to flow from the fourth coaxial line port to the power management module in a one-way mode. According to the embodiment of the invention, the reliability of power supply and communication between the front-view camera and the vehicle-mounted controller can be improved.

Description

Technical Field

[0001] This utility model relates to the field of vehicle accessory technology, and in particular to a power supply and communication circuit for a forward-looking camera and a vehicle forward-looking system. Background Technology

[0002] Currently, vehicle-mounted forward-looking systems mainly include a forward-looking camera, an on-board controller, and power supply and communication circuits connecting the forward-looking camera and the on-board controller. One existing power supply and communication circuit primarily uses a single-line coaxial cable, meaning power supply and data communication are achieved through a single coaxial link. However, the inventors discovered during implementation that when the single-line coaxial cable fails, the forward-looking camera will directly malfunction, indicating that the reliability of power supply and data communication using a single-line coaxial cable is poor. Utility Model Content

[0003] The technical problem to be solved by this utility model embodiment is to provide a power supply and communication circuit for a front-view camera, which can improve the reliability of power supply and communication between the front-view camera and the vehicle controller.

[0004] The further technical problem to be solved by this utility model embodiment is to provide a vehicle-mounted forward-looking system that can improve the reliability of power supply and communication between the forward-looking camera and the vehicle-mounted controller.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a power supply and communication circuit for a front-view camera, comprising:

[0006] The first coaxial cable port is located on the vehicle controller and is connected to the first power supply and data receiving module inside the vehicle controller respectively.

[0007] The second coaxial cable port is located on the front-view camera and is connected to the power management module and data serializer inside the front-view camera, respectively.

[0008] A first coaxial cable connects the first coaxial cable port and the second coaxial cable port;

[0009] The third coaxial cable port is located on the vehicle controller and is connected to the second power supply inside the vehicle controller and the data receiving module respectively. The power supply voltage of the first power supply is greater than the power supply voltage of the second power supply.

[0010] The fourth coaxial cable port is located on the front-view camera and is connected to the power management module and data serializer inside the front-view camera, respectively.

[0011] The second coaxial cable connects the third coaxial cable port and the fourth coaxial cable port;

[0012] A first unidirectional conduction switch is disposed between the second coaxial line port and the power management module to control the on / off state between the second coaxial line port and the power management module. When the first unidirectional conduction switch is turned on, current is allowed to flow unidirectionally from the second coaxial line port to the power management module; and

[0013] A second unidirectional conduction switch is disposed between the fourth coaxial line port and the power management module to control the connection and disconnection between the fourth coaxial line port and the power management module. When the second unidirectional conduction switch is turned on, current is allowed to flow unidirectionally from the fourth coaxial line port to the power management module.

[0014] Furthermore, both the first unidirectional conduction switch and the second unidirectional conduction switch are diodes.

[0015] Furthermore, the first coaxial cable port, the second coaxial cable port, the third coaxial cable port, and the fourth coaxial cable port are all FAKRA ports.

[0016] On the other hand, in order to solve the above-mentioned further technical problems, the present utility model provides the following technical solution: A vehicle-mounted forward-looking system, including a forward-looking camera, a vehicle-mounted controller, and a power supply and communication circuit respectively connected to the forward-looking camera and the vehicle-mounted controller, wherein the power supply and communication circuit is as described in any of the above claims.

[0017] Furthermore, the first coaxial cable port and the third coaxial cable port are both integrated on the vehicle controller; the second coaxial cable port and the fourth coaxial cable port are both integrated on the forward-facing camera.

[0018] Furthermore, both the first unidirectional switch and the second unidirectional switch are integrated into the forward-facing camera.

[0019] After adopting the above technical solution, the present utility model embodiment has at least the following beneficial effects: By adding a third coaxial cable port, a fourth coaxial cable port, and a second coaxial cable, the present utility model embodiment adds a coaxial cable transmission link between the vehicle controller and the front-view camera, thereby achieving power supply and data transmission in the same way, improving the reliability of power supply and communication between the front-view camera and the vehicle controller. Specifically, since the power supply voltage of the first power supply is greater than that of the second power supply, under normal conditions, the first unidirectional conduction switch will be turned on while the second unidirectional conduction switch will be turned off. At this time, the power management module of the front-view camera is powered by the power supply voltage of the second coaxial cable port, and can send video data to the vehicle controller simultaneously through the second coaxial cable port and the fourth coaxial cable port. When one of the coaxial cable transmission links fails, the other coaxial cable transmission link can be used as a backup to power the front-view camera normally and send video data to the vehicle controller. Attached Figure Description

[0020] Figure 1 This is a circuit block diagram of an optional embodiment of the vehicle-mounted forward-looking system of this utility model. Detailed Implementation

[0021] The present application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the following illustrative embodiments and descriptions are only used to explain the present utility model and are not intended to limit the present utility model. Moreover, the embodiments and features in the embodiments of the present application can be combined with each other unless otherwise specified.

[0022] like Figure 1 As shown, an optional embodiment of this utility model first provides a power supply and communication circuit 1 for a front-view camera, including:

[0023] The first coaxial cable port 10 is located on the vehicle controller 3 and is connected to the first power supply 30 and the data receiving module 32 inside the vehicle controller 3 respectively.

[0024] The second coaxial cable port 12 is located on the front-view camera 5 and is connected to the power management module 50 and the data serializer 52 inside the front-view camera 5 respectively.

[0025] The first coaxial cable 14 connects the first coaxial cable port 10 and the second coaxial cable port 12;

[0026] The third coaxial cable port 16 is located on the vehicle controller 3 and is connected to the second power supply 34 inside the vehicle controller 3 and the data receiving module 32 respectively. The power supply voltage of the first power supply 30 is greater than the power supply voltage of the second power supply 34.

[0027] The fourth coaxial cable port 17 is located on the front-view camera 5 and is connected to the power management module 50 and the data serializer 52 inside the front-view camera 5 respectively.

[0028] The second coaxial cable 18 connects the third coaxial cable port 16 and the fourth coaxial cable port 17;

[0029] A first unidirectional conduction switch D1 is disposed between the second coaxial cable port 12 and the power management module 50 to control the on / off state between the second coaxial cable port 12 and the power management module 50. When the first unidirectional conduction switch D1 is turned on, it allows current to flow unidirectionally from the second coaxial cable port 12 to the power management module 50; and

[0030] The second unidirectional switch D2 is disposed between the fourth coaxial line port 17 and the power management module 50 to control the on / off state between the fourth coaxial line port 17 and the power management module 50. When the second unidirectional switch D2 is turned on, current is allowed to flow unidirectionally from the fourth coaxial line port 17 to the power management module 50.

[0031] This embodiment of the invention adds a third coaxial cable port 16, a fourth coaxial cable port 17, and a second coaxial cable 18, thereby adding a new coaxial cable transmission link between the vehicle controller 3 and the front-view camera 5. This also enables power supply and data transmission, improving the reliability of power supply and communication between the front-view camera 5 and the vehicle controller 3. Specifically, since the supply voltage of the first power supply 30 is greater than that of the second power supply 34, under normal conditions, the first unidirectional switch D1 will be turned on while the second unidirectional switch D2 will be turned off. At this time, the power management module 50 of the front-view camera 5 is powered by the supply voltage of the second coaxial cable port 12, and can simultaneously send video data to the vehicle controller 3 through the second coaxial cable port 12 and the fourth coaxial cable port 17. When one of the coaxial cable transmission links fails, the other coaxial cable transmission link can be used as a backup to provide normal power to the front-view camera 5 and send video data to the vehicle controller 3.

[0032] In one optional embodiment of this utility model, such as Figure 1 As shown, both the first unidirectional conduction switch D1 and the second unidirectional conduction switch D2 are diodes. In this embodiment, by using diodes as the first unidirectional conduction switch D1 and the second unidirectional conduction switch D2 respectively, reverse current flow is prevented. The current of the power management module 50 of the front-view camera 5 in normal operating mode mainly comes from the second coaxial cable port 12. After appropriate voltage conversion, the power management module 50 supplies power to the various power-consuming modules of the front-view camera 5. The circuit principle is simple.

[0033] In specific implementation, the supply voltage of the first power supply 30 and the supply voltage of the second power supply 34 may differ by 1V or 0.5V; the data receiving module 32 inside the vehicle controller 3 may be a data storage device for storing video stream data or a deserializer for deserializing video stream data, etc.

[0034] In an optional embodiment of this utility model, the first coaxial cable port 10, the second coaxial cable port 12, the third coaxial cable port 16, and the fourth coaxial cable port 17 are all Fakra ports. Fakra ports are commonly used coaxial cable connection ports and are widely used in the automotive product field. In this embodiment, all of the above ports adopt Fakra ports, which are low in cost and effectively compatible.

[0035] On the other hand, such as Figure 1 As shown, an optional embodiment of this utility model provides a vehicle-mounted forward-looking system, including a forward-looking camera 5, a vehicle-mounted controller 3, and power supply and communication circuits respectively connecting the forward-looking camera 5 and the vehicle-mounted controller 3. The power supply and communication circuits are as described in any of the above embodiments. In this embodiment, the vehicle-mounted forward-looking system uses the aforementioned power supply and communication circuits, which can improve the reliability of power supply and communication between the forward-looking camera 5 and the vehicle-mounted controller 3.

[0036] In one optional embodiment of this utility model, such as Figure 1 As shown, the first coaxial cable port 10 and the third coaxial cable port 16 are both integrated on the vehicle controller 3; the second coaxial cable port 12 and the fourth coaxial cable port 17 are both integrated on the front-view camera 5. In this embodiment, by integrating the first coaxial cable port 10 and the third coaxial cable port 16 on the vehicle controller 3, and the second coaxial cable port 12 and the fourth coaxial cable port 17 on the front-view camera 5, the circuit structure is simplified, making maintenance and wiring easier.

[0037] In one optional embodiment of this utility model, such as Figure 1 As shown, both the first one-way switch D1 and the second one-way switch D2 are integrated into the front-view camera 5. In this embodiment, integrating both the first one-way switch D1 and the second one-way switch D2 into the front-view camera 5 simplifies the circuit structure and facilitates circuit layout.

[0038] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims. All of these forms are within the scope of protection of the present invention.

Claims

1. A power supply and communication circuit for a forward-looking camera, comprising: The first coaxial cable port is located on the vehicle controller and is connected to the first power supply and data receiving module inside the vehicle controller respectively. The second coaxial cable port is located on the front-view camera and is connected to the power management module and data serializer inside the front-view camera, respectively. as well as A first coaxial cable connects the first coaxial cable port and the second coaxial cable port; The power supply and communication circuit is characterized in that it further includes: The third coaxial cable port is located on the vehicle controller and is connected to the second power supply inside the vehicle controller and the data receiving module respectively. The power supply voltage of the first power supply is greater than the power supply voltage of the second power supply. The fourth coaxial cable port is located on the front-view camera and is connected to the power management module and data serializer inside the front-view camera, respectively. The second coaxial cable connects the third coaxial cable port and the fourth coaxial cable port; A first unidirectional conduction switch is disposed between the second coaxial line port and the power management module to control the on / off state between the second coaxial line port and the power management module. When the first unidirectional conduction switch is turned on, current is allowed to flow unidirectionally from the second coaxial line port to the power management module; and A second unidirectional conduction switch is disposed between the fourth coaxial line port and the power management module to control the connection and disconnection between the fourth coaxial line port and the power management module. When the second unidirectional conduction switch is turned on, current is allowed to flow unidirectionally from the fourth coaxial line port to the power management module.

2. The power supply and communication circuit for a front-view camera as described in claim 1, characterized in that, Both the first unidirectional switch and the second unidirectional switch are diodes.

3. The power supply and communication circuit for a front-view camera as described in claim 1, characterized in that, The first coaxial cable port, the second coaxial cable port, the third coaxial cable port, and the fourth coaxial cable port are all FAKRA ports.

4. A vehicle-mounted forward-looking system, comprising a forward-looking camera, a vehicle-mounted controller, and power supply and communication circuits respectively connected to the forward-looking camera and the vehicle-mounted controller, characterized in that, The power supply and communication circuit is the power supply and communication circuit as described in any one of claims 1-3.

5. The vehicle-mounted forward-looking system as described in claim 4, characterized in that, The first coaxial cable port and the third coaxial cable port are both integrated on the vehicle controller; the second coaxial cable port and the fourth coaxial cable port are both integrated on the forward-facing camera.

6. The vehicle-mounted forward-looking system as described in claim 4, characterized in that, Both the first unidirectional switch and the second unidirectional switch are integrated into the forward-facing camera.

Images