CN220894750U - ADAS controller and vehicle capable of preventing voltage from flowing backwards - Google Patents

Abstract

The utility model relates to the technical field of automatic driving, in particular to an ADAS controller for preventing voltage backflow and a vehicle, wherein the ADAS controller comprises: the first power supply is connected with the first SoC and is used for supplying power to the first SoC; the second power supply is connected with the second SoC and the deserializer and is used for supplying power to the second SoC and the deserializer; the deserializer is connected with the camera and is used for receiving the video signal sent by the camera and respectively transmitting the video signal to the first SoC and the second SoC for data processing; and a switch is also connected between the first SoC and the deserializer, the switch is powered by a second power supply, and the switch is used for cutting off a signal connection path from the deserializer to the first SoC when the first SoC is powered off so as to prevent voltage backflow. The utility model solves the technical problem that the ADAS controller is damaged due to voltage backflow of the high-speed signal pin of the first SoC.

Description

ADAS controller and vehicle capable of preventing voltage from flowing backwards

Technical Field

The utility model relates to the technical field of automatic driving, in particular to an ADAS controller capable of preventing voltage backflow and a vehicle.

Background

ADAS (ADVANCED DRIVING ASSISTANCE SYSTEM ) controller (or ADAS domain controller) bears the data processing calculation force required by automatic driving, including but not limited to laser radar, camera, inertial navigation and other equipment data processing, and also bears the safety of bottom core data and networking data under automatic driving, thereby serving the intellectualization of automobiles.

The conventional anti-voltage backflow circuit generally uses a diode or a field effect transistor, and cannot meet the requirement of an ADAS controller on high-speed data transmission. However, if the voltage is reversed, pins of an internal SoC (System on Chip) are easily reversed, which causes damage to the ADAS controller.

Disclosure of utility model

First, the technical problem to be solved

In view of the above-mentioned shortcomings and disadvantages of the prior art, the utility model provides an ADAS controller capable of preventing voltage backflow and a vehicle, and solves the technical problem that the ADAS controller is damaged due to voltage backflow of a chip high-speed signal pin.

(II) technical scheme

In order to achieve the above purpose, the main technical scheme adopted by the utility model comprises the following steps:

In a first aspect, an embodiment of the present utility model provides an ADAS controller for preventing voltage backflow, including: the first power supply is connected with the first SoC and is used for supplying power to the first SoC; the second power supply is connected with the second SoC and the deserializer and is used for supplying power to the second SoC and the deserializer; the deserializer is connected with the camera and is used for receiving the video signal sent by the camera and respectively transmitting the video signal to the first SoC and the second SoC for data processing; and a switch is also connected between the first SoC and the deserializer, the switch is powered by a second power supply, and the switch is used for cutting off a signal connection path from the deserializer to the first SoC when the first SoC is powered off so as to prevent voltage backflow.

Preferably, a serializer is arranged in the camera and is used for converting video data shot by the camera into serial video signals for transmission.

Preferably, an input end of the deserializer is connected with an output end of the serializer, and is used for receiving the serial video signal sent by the serializer, converting the serial video signal into a parallel video signal and transmitting the parallel video signal to the first SoC and the second SoC.

Preferably, the serial video signal is a serial video signal in GMSL or FPD-LINK format, and the parallel video signal is a parallel video signal in MIPI format.

Preferably, the switch is a single pole single throw switch or a single pole double throw switch for on-off control of parallel video signals in MIPI format.

Preferably, the switch is a switch chip of the TS3DV642 type.

Preferably, the GPIO terminal of the first SoC is connected to the SEL terminal of the switch through the driver, and the SEL terminal of the switch inputs a low level when the first SoC is in a power-off state.

Preferably, a power supply terminal of the second SoC is connected to a SEL terminal of the switch through a driver, and the SEL terminal of the switch inputs a low level when the second SoC is in a power-off state.

Preferably, the drive is a model SN74LVC1G07-Q1 drive.

In a second aspect, an embodiment of the present utility model provides a vehicle, including an ADAS controller of the first aspect and implementations of the first aspect.

(III) beneficial effects

The beneficial effects of the utility model are as follows:

The utility model relates to an ADAS controller for preventing voltage backflow, which is characterized in that a first SoC is connected with a deserializer through a switch, a second SoC is directly connected with the deserializer, the two SoCs can simultaneously receive two paths of video signals output by the same deserializer, the power supply of the deserializer is only from a second power supply of the second SoC, a switch is added between the first SoC which does not supply power to the deserializer, the video signal output is controlled to be on-off, namely, when the first SoC is in a power-off state, the first SoC outputs a low level through a GPIO end to close the input-output communication state of the switch, so that the signal connection path from the deserializer to the first SoC is cut off, and the voltage backflow is prevented. Therefore, when the first SoC is in a shutdown or power-down state and the second SoC and the deserializer are in a power supply state and normally output the picture, the deserializer can not reconfigure the output state of the MIPI signal, so that the two paths of video signals continue to output the picture, and the problem that the first SoC in the power-down state is subjected to reverse voltage at the moment due to the input of the MIPI signal is solved.

The ADAS controller for preventing the voltage backflow is provided with the technical effects, so that the vehicle provided with the ADAS controller for preventing the voltage backflow has the corresponding technical effects.

Drawings

Fig. 1 is a circuit block diagram of an ADAS controller of the present utility model that prevents voltage back-flow;

fig. 2 is a schematic circuit diagram of an ADAS controller for preventing voltage backflow according to the present utility model;

Fig. 3 is a schematic circuit diagram of an ADAS controller for preventing voltage backflow according to the present utility model.

[ Reference numerals description ]

1: A first power supply; 2: a first SoC;3: a second power supply; 4: a second SoC;5: a deserializer; 6: a camera; 7: and (3) a switch.

Detailed Description

The invention will be better explained by the following detailed description of the embodiments with reference to the drawings.

It should be noted that, in the description of the present invention, the directions or positional relationships indicated by the terms "front", "rear", "left", "right", "upper", "lower", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and do not require that the present invention must be constructed and operated in a specific direction, and thus should not be construed as limiting the present invention. The terms "front", "back", "left", "right", "upper", "lower" as used in the description of the present invention refer to directions in the drawings, and the terms "inner", "outer" refer to directions toward or away from the geometric center of a particular component, respectively.

As described above, the inventors have found in the study of the ADAS controller that there is a case where the SoC in the power-off state is reverse-biased due to the video signal input in the existing ADAS controller, thereby causing damage to the ADAS controller.

In order to solve the technical problems, the embodiment of the application provides an ADAS controller for preventing voltage backflow and a vehicle, wherein a plurality of SoCs and deserializers are arranged in the ADAS controller, a switch is added on a video signal path between the SoCs and the deserializers at a power supply side of the deserializers, and the switch can control on-off of video signal output so as to prevent voltage backflow, thereby ensuring the safety of the ADAS controller.

Referring to fig. 1 to 3, an ADAS controller for preventing voltage backflow provided by an embodiment of the present application includes: a first power supply 1 and a second power supply 3, the first power supply 1 is connected with the first SoC 2 and is used for supplying power to the first SoC 2; the second power supply 3 is connected to the second SoC4, and is configured to supply power to the second SoC4, and the ADAS controller in this embodiment includes two SOCs, namely a first SoC 2 and a second SoC4, for implementing processing and analysis of video data captured by the camera 6.

It can be understood that the SoC is a circuit chip integrated with a plurality of electronic components and connection lines, and can be used in various fields such as computers, communication devices, digital products, and the like. The embodiment does not limit the type and model of the SoC specifically, and can be selected according to actual needs. As such, the present embodiment does not limit the supply voltages of the first power supply 1 and the second power supply 3, which may be matched according to the type and model of the corresponding SoC, and the supply voltages of the first power supply 1 and the second power supply 3 may be 3.3V, for example.

Further, the ADAS controller in this embodiment further includes a deserializer 5, where the deserializer 5 is connected to the camera 6, and is configured to receive a video signal sent by the camera 6, and transmit the video signal to the first SoC2 and the second SoC4 for data processing, respectively; the cameras 6 in this embodiment may include 4 cameras, and the cameras 6 may be vehicle-mounted cameras, for collecting road conditions and traffic conditions in driving of the automobile, including vehicles in front, pedestrians, obstacles, and the like, in one embodiment, the cameras 6 may be built-in with a serializer, where the serializer is used to convert video data captured by the cameras 6 into serial video signals for transmission, and correspondingly, an input end of the deserializer 5 is connected with an output end of the serializer, and is used to receive the serial video signals sent by the serializer, and convert the serial video signals into parallel video signals and transmit the parallel video signals to the first SoC2 and the second SoC4.

In one embodiment, the serial video signal may be a serial video signal in GMSL or FPD-LINK format and the parallel video signal may be a parallel video signal in MIPI format. That is, the deserializer 5 may be a deserializer chip converting a serial video signal in GMSL or FPD-LINK format into a parallel video signal in MIPI format, and the deserializer 5 may be a MAX96712 deserializer or other deserializers having the same function, for example.

Further, a switch 7 is further connected between the first SoC2 and the deserializer 5 in the present embodiment, the switch 7 is powered by the second power source 3, and the switch 7 is used for cutting off the signal connection path from the deserializer 5 to the first SoC2 when the first SoC2 is powered off, so as to prevent the voltage from flowing backward into the first SoC 2. The switch 7 may be a single-pole single-throw switch or a single-pole double-throw switch for controlling on-off of parallel video signals in MIPI format. For example, the switch 7 may be a series of chips of the TS3DV642 model, which are dedicated to MIPI signals, and which both initiate the function of cutting off the signal path and meet the attenuation requirements of MIPI signals.

In this embodiment, the first SoC2 is connected to the deserializer 5 through the switch 7, the second SoC4 is directly connected to the deserializer 5, both can receive two paths of MIPI format video signals output by the same deserializer 5 at the same time, the power supply of the deserializer 5 is only from the second power supply 3 of the second SoC4, the switch 7 is added to the MIPI signal path between the first SoC2 which does not supply power to the deserializer 5 and the deserializer 5, and on-off control is performed on the MIPI signal output, i.e. when the first SoC2 is in the power-off state, the first SoC2 outputs a low level through the GPIO terminal to close the input-output communication state of the switch 7, so as to cut off the signal connection path from the deserializer 5 to the first SoC2 and prevent voltage backflow. Therefore, when the first SoC2 is in a shutdown or power-down state and the second SoC4 and the deserializer 5 are in a power-on state and normally output pictures, the deserializer 5 can not reconfigure the output states of MIPI signals, so that the two paths of MIPI signals continue to output pictures, and the problem that the first SoC2 in the power-down state is reversely charged due to the input of the MIPI signals at the moment is solved.

According to the embodiment, the situation that the MIPI signal is reversely charged when the MIPI signal is still input to the pin of the first SoC2 after the first SoC2 is powered down can be avoided, because the first SoC2 can cause physical damage or influence the next normal power-on starting of the first SoC2 or influence the service life of the first SoC2 in a reverse charging state, the MIPI signal network close to the side of the first SoC2 is in a high-resistance state when the first SoC2 is not powered up through the single-pole single-throw switch or the single-pole double-throw switch added with the MIPI signal, and then the manual requirement of a chip is met, and the first SoC2 is not reversely charged.

Further, as shown in fig. 2 and 3, the output terminals camela-and camela+ of the CAMERA are connected to the SIOAN terminal and SIOAP terminal of the deserializer U1, so that the video signal is input to the deserializer U1, the pins 49 to 56 and the pins 58 and 59 of the deserializer U1 are connected to the second SoC, so that the video signal in the one-channel MIPI format is sent to the second SoC; the pins 40 to 47 and 36 and 37 of the deserializer U1 are connected with the pins 20 to 29 of the switch U2, the pins 10 to 15 and 5 to 8 of the switch U2 are connected with the first SoC, wherein the SoC1_ PORZ _out_n terminal of the first SoC, that is, an output terminal is connected to the SEL2 terminal of the switch U2 through the driver U3, specifically, the driver U3 may be a single channel open drain buffer/driver of SN74LVC1G07-Q1 type.

In this embodiment, when the first SoC is in the power-on state, the SEL2 end of the switch U2 inputs a high level, and at this time, the switch U2 is in the on state, and the deserializer U1 transmits the video signal to the first SoC and the second SoC respectively for data processing; when the first SoC is in the power-off state, the SEL2 end of the switch U2 inputs a low level, and at this time, the switch U2 is in the off state, so that the signal connection path from the deserializer U1 to the first SoC is cut off, and voltage backflow is prevented.

Because the vehicle provided in this embodiment has the ADAS controller for preventing voltage backflow provided in any one of the embodiments, the vehicle has all the advantages of the ADAS controller for preventing voltage backflow provided in any one of the embodiments, and will not be described herein.

In the description of the present utility model, it should be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium; may be a communication between two elements or an interaction between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature is "on" or "under" a second feature, which may be in direct contact with the first and second features, or in indirect contact with the first and second features via an intervening medium. Moreover, a first feature "above," "over" and "on" a second feature may be a first feature directly above or obliquely above the second feature, or simply indicate that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is level lower than the second feature.

In the description of the present specification, the terms "one embodiment," "some embodiments," "examples," "particular examples," or "some examples," etc., refer to particular features, structures, materials, or characteristics described in connection with the embodiment or example as being included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

While embodiments of the present utility model have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that alterations, modifications, substitutions and variations may be made in the above embodiments by those skilled in the art within the scope of the utility model.

Claims (10)

1. An ADAS controller for preventing voltage backflow, comprising:

A first power supply (1) connected with a first SoC (2) and used for supplying power to the first SoC (2);

A second power supply (3) connected with a second SoC (4) and a deserializer (5) and used for supplying power to the second SoC (4) and the deserializer (5);

The deserializer (5) is connected with the camera (6) and is used for receiving video signals sent by the camera (6) and respectively transmitting the video signals to the first SoC (2) and the second SoC (4) for data processing;

A switch (7) is further connected between the first SoC (2) and the deserializer (5), the switch (7) is powered by the second power supply (3), and the switch (7) is used for cutting off a signal connection path from the deserializer (5) to the first SoC (2) when the first SoC (2) is powered off so as to prevent voltage backflow.

2. The anti-backflow ADAS controller according to claim 1, characterized in that a serializer is provided in the camera (6) for converting video data captured by the camera (6) into serial video signals for transmission.

3. The anti-voltage-backflow ADAS controller according to claim 2, characterized in that the input of the deserializer (5) is connected to the output of the serializer, for receiving the serial video signal sent by the serializer, and converting the serial video signal into a parallel video signal and transmitting to the first SoC (2) and the second SoC (4).

4. The anti-voltage back-flow ADAS controller of claim 3, wherein the serial video signal is a GMSL or FPD-LINK format serial video signal and the parallel video signal is a MIPI format parallel video signal.

5. The anti-voltage-back-flow ADAS controller according to claim 1, characterized in that the switch (7) is a single-pole single-throw switch or a single-pole double-throw switch for on-off control of parallel video signals of MIPI format.

6. The anti-reverse voltage ADAS controller according to claim 5, characterized in that the switch (7) is a switch chip of the TS3DV642 model.

7. The anti-voltage-backflow ADAS controller according to claim 6, characterized in that the GPIO terminal of the first SoC (2) is connected to the SEL terminal of the switch (7) through a driver, and the SEL terminal of the switch (7) inputs a low level when the first SoC (2) is in a power-off state.

8. The anti-voltage backflow ADAS controller according to claim 6, characterized in that the power supply terminal of the second SoC (4) is connected to the SEL terminal of the switch (7) through a driver, and the SEL terminal of the switch (7) inputs a low level when the second SoC (4) is in a power-off state.

9. The anti-voltage back-flow ADAS controller of claim 7 or 8, wherein the driver is a model SN74LVC1G07-Q1 driver.

10. A vehicle comprising the anti-voltage-back ADAS controller of any one of claims 1-9.