Data One-to-Two Conversion Circuit, System and Driverless Vehicle

Abstract

The present disclosure relates to a data one-to-two conversion circuit, system and unmanned vehicle, the data one-to-two conversion circuit comprises: a switching switch, comprising an input end, a switching control signal end, a first output end and a second output end; the input end is connected to a vehicle-mounted sensor, and is used to receive a sensing signal of the vehicle-mounted sensor; the switching control signal end selects the first output end or the second output end for output in a time-sharing manner based on the switching control signal; the first output end is connected to a first control unit; the second output end is connected to a second control unit; the signal transmission rate of the switching switch is equal to or greater than the rate at which the vehicle-mounted sensor sends the sensing signal. The technical solution of the embodiment of the present disclosure, by setting a switching switch, outputs the sensing signal of a single vehicle-mounted sensor to the first control unit and the second control unit in a time-sharing manner, realizes the time-sharing utilization of the sensing signal, is conducive to reducing the number of vehicle-mounted sensors, and improves the problem that when the number of vehicle-mounted sensors in the prior art is large, the difficulty of their installation and related wiring is large.

Description

Technical Field

[0001] The present disclosure relates to the field of electronic technology, and in particular to a one-to-two data conversion circuit, system and unmanned vehicle. Background Art

[0002] With the development of intelligent vehicle technology, unmanned driving technology has gradually become a hot topic in the field of vehicle automatic control. Unmanned vehicles can also be called wheeled mobile robots, which mainly rely on the intelligent driving system based on the computer system in the vehicle to achieve unmanned driving. Unmanned vehicles use on-board sensors to sense the vehicle's surrounding environment, and control the vehicle's steering and speed based on the road, vehicle position and obstacle information obtained through perception, so that the vehicle can travel safely and reliably on the road.

[0003] In the prior art, as the number of on-board computers, also known as electronic control units (ECUs), in driverless vehicles increases, more and more ECUs have data requirements for on-board sensors. If the on-board sensors corresponding to each ECU are installed separately, the vehicle body will be filled with on-board sensors, making the installation of on-board sensors and related wiring more difficult. Summary of the invention

[0004] In order to solve the above technical problems or at least partially solve the above technical problems, the present disclosure provides a one-to-two data conversion circuit, system and unmanned vehicle.

[0005] A first aspect of an embodiment of the present disclosure provides a data one-to-two conversion circuit, including:

[0006] A switching switch, comprising an input terminal, a switching control signal terminal, a first output terminal and a second output terminal;

[0007] The input end is connected to the vehicle-mounted sensor and is used to receive the sensing signal of the vehicle-mounted sensor;

[0008] The switching control signal terminal selects the first output terminal or the second output terminal for output in a time-sharing manner based on the switching control signal;

[0009] The first output terminal is connected to a first control unit;

[0010] The second output terminal is connected to the second control unit;

[0011] Wherein, the signal transmission rate of the switching switch is equal to or greater than the rate at which the vehicle-mounted sensor sends the sensing signal.

[0012] In some embodiments, the switch further includes a power supply terminal;

[0013] The power supply terminal is connected to a voltage converter, and a voltage is input to the input terminal of the voltage converter.

[0014] In some embodiments, the voltage converter is a low dropout linear regulator.

[0015] In some embodiments, the data one-to-two conversion circuit further includes a first inductance network and a first DC-blocking capacitance network;

[0016] A first end of the first inductance network is connected to the input terminal of the voltage converter, and a second end of the first inductance network and a first end of the first DC-blocking capacitance network are both connected to the vehicle-mounted sensor through a first coaxial cable;

[0017] A second end of the first DC-blocking capacitance network is connected to the input terminal of the switching switch, and an output terminal of the voltage converter is connected to the power supply terminal of the switching switch.

[0018] In some embodiments, the data one-to-two conversion circuit further includes a second DC-blocking capacitance network and a third DC-blocking capacitance network;

[0019] A first end of the second DC-blocking capacitance network is connected to the first control unit, and a second end is connected to the first output terminal;

[0020] A first end of the third DC-blocking capacitance network is connected to the second control unit, and a second end is connected to the second output terminal.

[0021] In some embodiments, the switching control signal terminal is connected to the first control unit and the second control unit to receive a switching control signal from the first control unit or the second control unit; the voltage comes from an external power supply.

[0022] In some embodiments, the data one-to-two conversion circuit further includes a second inductance network and a third inductance network;

[0023] A first end of the second inductance network and a first end of the second DC-blocking capacitance network are both connected to the first control unit through a second coaxial cable, and a second end of the second inductance network is connected to the input terminal of the voltage converter and a first end of the first inductance network;

[0024] A first end of the third inductance network and a first end of the third DC-blocking capacitance network are both connected to the second control unit through a third coaxial cable, and a second end of the third inductance network is connected to the switching control signal terminal of the switching switch.

[0025] In some embodiments, the sensing signals transmitted by the input terminal, the first output terminal, and the second output terminal of the switching switch are all differential signals.

[0026] In some embodiments, the signal transmission rate of the switching switch is equal to or greater than 1.4 Gbps.

[0027] A second aspect of the embodiments of the present disclosure provides a data one-to-two conversion system, including:

[0028] A conversion circuit, adopting any one of the above data one-to-two conversion circuits;

[0029] A vehicle-mounted sensor, connected to the input end of the switching switch;

[0030] A first control unit, connected to the first output end of the switching switch;

[0031] A second control unit, connected to the second output end of the switching switch;

[0032] Wherein, under the control of the switching control signal, the switching switch outputs the sensing signal to the first control unit or the second control unit at different times.

[0033] In some embodiments, the vehicle-mounted sensor is a camera.

[0034] In some embodiments, the number of the switching switches is N, and the number of the cameras is M. Both M and N are positive integers, and M≥N;

[0035] The first control unit includes M sensing signal receiving ends, and the second control unit includes N sensing signal receiving ends;

[0036] Wherein, the sensing signals of N cameras are transmitted to the first control unit and the second control unit at different times, and the sensing signals of the remaining M-N cameras are only transmitted to the first control unit.

[0037] In some embodiments, the first control unit is an unmanned driving controller, and the second control unit is an ADAS controller;

[0038] In some embodiments, the level of the unmanned driving controller is L3, L4 or above L4, and the level of the ADAS controller is L1 or L2.

[0039] A third aspect of the embodiments of the present disclosure provides an unmanned vehicle, including any one of the above data one-to-two conversion systems.

[0040] The technical solutions provided by the embodiments of the present disclosure have the following advantages compared with the prior art:

[0041] The data one-to-two conversion circuit provided by the embodiments of the present disclosure includes a switching switch, whose input terminal, first output terminal, and second output terminal are respectively connected to a vehicle-mounted sensor, a first control unit, and a second control unit, and whose switching control signal terminal receives a switching control signal; meanwhile, the signal transmission rate of the switching switch is equal to or greater than the rate at which the vehicle-mounted sensor sends sensing signals. Thus, the switching switch can achieve the switching output of high-speed signals, and it can time-division transmit the sensing signals of the vehicle-mounted sensor to the first control unit and the second control unit under the control of the switching control signal. Therefore, the sensing signals of the single vehicle-mounted sensor can be controlled by the switching switch to be utilized by the two control units in a time-division manner, that is, the two controllers can utilize the sensing signals of the vehicle-mounted sensor in a time-division manner, so that the sharing of the sensing signals of the vehicle-mounted sensor between the two control units can be realized, thereby reducing the number of vehicle-mounted sensors and facilitating the reduction of the installation difficulty of the vehicle-mounted sensors and the related wiring difficulty. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] The drawings herein are incorporated into the specification and constitute a part of this specification, showing embodiments consistent with the present disclosure, and are used together with the specification to explain the principles of the present disclosure.

[0043] To more clearly illustrate the technical solutions in the embodiments of the present disclosure or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, other drawings can also be obtained based on these drawings without creative efforts.

[0044] Figure 1 It is a schematic diagram of the camera data transmission method of an unmanned vehicle in the prior art;

[0045] Figure 2 It is a schematic structural diagram of a data one-to-two conversion circuit according to an embodiment of the present disclosure;

[0046] Figure 3 It is a schematic structural diagram of another data one-to-two conversion circuit according to an embodiment of the present disclosure;

[0047] Figure 4 It is a schematic structural diagram of yet another data one-to-two conversion circuit according to an embodiment of the present disclosure;

[0048] Figure 5 It is a schematic structural diagram of yet another data one-to-two conversion circuit according to an embodiment of the present disclosure;

[0049] Figure 6 It is a schematic structural diagram of yet another data one-to-two conversion circuit according to an embodiment of the present disclosure;

[0050] Figure 7Schematic diagram of the capacitance isolation network and the inductance network in the data one-to-two conversion circuit shown in the embodiments of the present disclosure;

[0051] Figure 8 Schematic diagram of a data one-to-two conversion system according to an embodiment of the present disclosure;

[0052] Figure 9 Schematic diagram of another data one-to-two conversion system according to an embodiment of the present disclosure;

[0053] Figure 10 Schematic diagram of yet another data one-to-two conversion system according to an embodiment of the present disclosure;

[0054] Figure 11 Schematic diagram of yet another data one-to-two conversion system according to an embodiment of the present disclosure;

[0055] Figure 12 Schematic diagram of yet another data one-to-two conversion system according to an embodiment of the present disclosure. Detailed implementation manners

[0056] In order to more clearly understand the above objects, features and advantages of the present disclosure, the solutions of the present disclosure will be further described below. It should be noted that, without conflict, the embodiments of the present disclosure and the features in the embodiments may be combined with each other.

[0057] Many specific details are set forth in the following description in order to provide a thorough understanding of the present disclosure, but the present disclosure may be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only a part of the embodiments of the present disclosure, rather than all of the embodiments.

[0058] In view of the prior art, two different control units (i.e., controllers) have input requirements for the sensing signals of the same vehicle-mounted sensor, and the input requirements for the sensing signals of different controllers can be spaced apart in time. Therefore, the embodiments of the present disclosure provide a data one-to-two conversion circuit to output the sensing signals of a single vehicle-mounted sensor to two controllers in a time-sharing manner, thereby realizing the sharing of the sensing signals of the vehicle-mounted sensor between two controllers; at the same time, the circuit structure is relatively simple, the laying difficulty is relatively low, and it is convenient for in-vehicle integration and application.

[0059] Specifically: The vehicle-mounted sensors of driverless vehicles include radars and image sensors. The radars may include lidars, ultrasonic radars, and millimeter-wave radars, and the image sensor may be a camera. Taking the vehicle-mounted sensor as a camera as an example, its data transmission method usually adopts the data transmission method as Figure 1 shown.

[0060] Figure 1In this case, after the signal collected by the camera is converted inside the camera, a high-speed serial signal is output. For example, a complementary metal-oxide-semiconductor (CMOS) array of the camera collects data, and the collected data is processed by image signal processing (ISP processing), and then encoded by an encoder to be converted into a high-speed serial signal. The high-speed serial signal is transmitted to the vehicle-mounted controller via a cable, decoded by a decoder in the vehicle-mounted controller, and then transmitted to a system on chip (SoC) for data processing to detect the vehicle body's surrounding environment within the camera's field of view.

[0061] With the increase in the number of electronic control units (also known as "vehicle computers", "in-vehicle computers", "controllers") of driverless vehicles, the number of controllers that require input of camera data also increases. For example, an L2-level advanced driving assistant system (ADAS) controller requires camera data to achieve a 360-degree surround view function, and it needs at least 4 cameras around the vehicle body; while an L4-level driverless controller requires camera data to achieve functions such as visual simultaneous localization and mapping (VSLAM), object detection (OD), and multiple object tracking (MOT) for driverless driving, and it needs at least 6 cameras around the vehicle body.

[0062] In the prior art, the cameras required by the above ADAS controller and the cameras required by the driverless controller are installed separately, which will result in a relatively large number of cameras around the vehicle body, requiring more installation space, making it difficult to install the cameras and wire the vehicle body; at the same time, due to the large number of cameras and wires, the cost of driverless vehicles is relatively high.

[0063] In view of the above problems, the embodiments of the present disclosure propose a solution to achieve data sharing of vehicle-mounted controllers by using a switching switch to reduce the number of cameras and the difficulty of vehicle body wiring. The vehicle-mounted controller includes, but is not limited to, cameras.

[0064] Specifically: for scenarios where the two controllers do not need to use the camera data at the same time. For example: when the unmanned vehicle is not driving, it needs to achieve 360-degree surround view. At this time, the camera data is provided to the L2-level ADAS controller; while the unmanned vehicle is driving, the camera data does not need to be provided to the ADAS controller, but to the L4-level unmanned driving controller to support the unmanned driving function. In this way, the two controllers can use the data collected by the camera in a time-sharing manner, that is, realize the time-sharing sharing of the camera data.

[0065] Combine the following Figures 2 - 12 , an exemplary description is given of the data one-to-two conversion circuit and system provided in the embodiments of the present disclosure.

[0066] Figure 2 FIG. 1 is a schematic diagram of a data one-to-two conversion circuit according to an embodiment of the present disclosure. Figure 2 The data one-to-two conversion circuit 10 may include: a switching switch 11, including an input terminal 111, a switching control signal terminal 112, a first output terminal 113 and a second output terminal 114; the input terminal 111 is connected to the vehicle-mounted sensor 21, and is used to receive the sensor signal of the vehicle-mounted sensor 21; the switching control signal terminal 112 selects the first output terminal 113 or the second output terminal 114 for output based on the switching control signal; the first output terminal 113 is connected to the first control unit 22; the second output terminal 114 is connected to the second control unit 23; wherein the signal transmission rate of the switching switch 11 is equal to or greater than the rate at which the vehicle-mounted sensor sends the sensor signal.

[0067] The input terminal 111 of the switch 11 receives the sensing data (i.e., sensing signal) from the vehicle-mounted sensor 21, and based on the switching control signal received by the switching control signal terminal 112, the first output terminal 113 or the second output terminal 114 is selected to output the sensing data in a time-sharing manner, that is, the switch 11 transmits the sensing data to the first control unit 22 and the second control unit 23 in a time-sharing manner based on the switching control signal received by the switching control signal terminal 112, thereby realizing the time-sharing sharing of the sensing data of the vehicle-mounted sensor 21 between the first control unit 22 and the second control unit 23. Based on this, when both the first control unit 22 and the second control unit 23 have a sensing signal input requirement, the first control unit 22 and the second control unit 23 can share the sensing signal of the vehicle-mounted sensor 21, without the need to separately set up respective vehicle-mounted sensors 21 for the first control unit 22 and the second control unit 23, thereby reducing the number of vehicle-mounted sensors 21, which is conducive to reducing the layout space occupied by the vehicle-mounted sensors 21, reducing the difficulty of installing the vehicle-mounted sensors 21, and reducing the difficulty of laying out the relevant wiring of the vehicle-mounted sensors 21.

[0068] Exemplarily, the switching control signal may be a pulse signal including a first level and a second level; when the switching control signal is at the first level, the sensing signal is output from the first output terminal 113, that is, the sensing signal is transmitted to the first control unit 22; when the switching control signal is at the second level, the sensing signal is output from the second output terminal 114, that is, the sensing signal is transmitted to the second control unit 23. Based on the switching of the first level and the second level in the switching control signal, the sensing signal can be output to the first control unit 22 and the second control unit 23 in a time-sharing manner.

[0069] Exemplarily, the first level signal may be a high level signal, and the second level signal may be a low level signal; or the first level signal may be a low level signal, and the second level signal may be a high level signal. The embodiments of the present disclosure are not limited to this, and are described in detail exemplarily below.

[0070] In addition, the signal transmission rate of the switching switch 11 is greater than or equal to the rate at which the vehicle-mounted sensor 21 sends the sensor signal, and can be called a high-speed switching switch, which supports a one-to-two output of a high-speed signal corresponding to the sensor signal, thereby satisfying the one-to-two conversion of the sensor signal.

[0071] For example, taking the vehicle-mounted sensor 21 as a camera, the data rate of the high-speed serial signal sent by the camera to the switch 11 is related to the resolution of the camera and its related configuration parameters. The data rate of the high-speed serial signal (i.e., the rate at which the vehicle-mounted sensor 21 sends the sensor signal) is usually between 1Gbps and 2Gbps. Based on this, by setting the signal transmission rate of the switch 21 to be equal to or greater than 2Gbps, the transmission rate requirement of the camera can be met, and at the same time, the one-to-two conversion of its sensor signal can be achieved.

[0072] Exemplarily, when the rate at which the camera sends the sensor signal is 1.4 Gbps, the switching switch 11 may adopt a USB3.0 switching switch whose signal transmission rate is 5 Gbps to meet the signal transmission requirements; or, the switching switch 11 may adopt other switching switches with a one-to-two conversion function and a signal transmission rate equal to or greater than 1.4 Gbps, which is not limited to the embodiments of the present disclosure.

[0073] It should be noted that this embodiment only takes the vehicle-mounted sensor 21 as an example of a camera, and illustrates that when the signal transmission rate of the switching switch 11 is higher than the rate at which the vehicle-mounted sensor sends the sensor signal, it can meet the requirements of sensor signal transmission and one-to-two conversion.

[0074] In other embodiments, when the transmission rate of the sensing signal of the vehicle-mounted sensor 21 is other values, the signal transmission rate of the switching switch can be set accordingly. For example, it can be 3 Gbps, 5 Gbps, 8 Gbps, or other values that meet the transmission requirements of the sensing signal. It can be set according to the requirements of the data one-to-two conversion circuit and the vehicle-mounted sensor. The embodiments of the present disclosure are not limited thereto.

[0075] The data one-to-two conversion circuit 10 provided by the embodiments of the present disclosure is configured such that the input end 111 of the switching switch 11 is connected to the vehicle-mounted sensor, the first output end 113 is connected to the first control unit 22, the second output end 114 is connected to the second control unit 23, and the switching control signal end 112 selectively outputs to the first output end 113 and the second output end 114 based on the switching control signal in a time-sharing manner. It can realize the time-sharing output of the sensing signal of the vehicle-mounted sensor 21 to the first control unit 22 and the second control unit 23, thereby realizing the time-sharing sharing of the sensing signal of the vehicle-mounted sensor 21 by the first control unit 22 and the second control unit 23. It is not necessary to provide independent vehicle-mounted sensors 21 for the first control unit 22 and the second control unit 23, which is beneficial to reducing the number of vehicle-mounted sensors 21, reducing the installation difficulty of the vehicle-mounted sensors 21, and reducing the wiring difficulty of its related wiring. In addition, by setting the signal transmission rate of the switching switch 11 to meet the signal transmission rate requirements of the vehicle-mounted sensor 21, it is beneficial to avoid distortion of the sensing signal, that is, the stability and robustness of the sensing signal are relatively high, and the quality is good; when applied to a driverless vehicle, it is beneficial to accurately detect the surrounding environment of the vehicle body.

[0076] On the basis of the above embodiments, to enable the normal operation of the switching switch 11, the switching switch 11 also needs to be powered. The following is combined with Figure 3 for exemplary illustration.

[0077] In some embodiments, Figure 3 is a schematic structural diagram of another data one-to-two conversion circuit according to an embodiment of the present disclosure. Referring to Figure 3 , the switching switch 11 further includes a power supply terminal 115; the power supply terminal 115 is connected to the voltage converter 12, and the input terminal 121 of the voltage converter 12 has a voltage input.

[0078] Among them, the input terminal 121 of the voltage converter 12 is connected to the power supply voltage, and its output terminal 122 is connected to the power supply terminal 115 of the switching switch 11, which is used to convert the power supply voltage into a voltage suitable for the switching switch 11 to utilize, so as to realize power supply for the switching switch 11 to ensure that the switching switch 11 is powered on and operates.

[0079] Exemplarily, the actual product form of the voltage converter 12 includes, but is not limited to, a voltage conversion circuit and a voltage conversion chip; the voltage converter 12 can be a boost voltage converter, a buck voltage converter, or a buck-boost voltage converter, and can be set according to the power supply voltage and the operating voltage of the switching switch 11, and the embodiments of the present disclosure are not limited thereto.

[0080] In some embodiments, the voltage converter 12 can be a Low Dropout Regulator (LDO).

[0081] Among them, the low dropout linear regulator is a microchip system with very low self-consumption, integrating hardware circuits such as MOSFETs with extremely low on-resistance on the line, Schottky diodes, sampling resistors, and voltage-dividing resistors, and having functions such as overcurrent protection, over-temperature protection, a precision reference source, a differential amplifier, and a delay element, and usually having extremely low self-noise and a high Power Supply Rejection Ratio (PSRR).

[0082] Based on this, compared with a direct current-direct current (DC-DC) voltage converter, using a low dropout linear regulator is beneficial to reducing the interference of power supply voltage noise on the sensing signal of the vehicle-mounted sensor, and thus is beneficial to ensuring the stability of the sensing signal output by the switching switch 11.

[0083] On the basis of the above implementation manner, it is also possible to set the sensing signal and the power supply signal of the vehicle-mounted sensor to be modulated and transmitted together to further reduce the number of interconnection harnesses, thereby facilitating the reduction of the wiring difficulty. This transmission method can be called a Power Over Coaxial (POC) power supply method, that is, a coaxial cable is used to transmit voltage and sensing signals. The following is combined with Figure 4 for exemplary illustration.

[0084] In some embodiments, Figure 4 is a schematic structural diagram of another data one-to-two conversion circuit according to an embodiment of the present disclosure. Referring to Figure 4 , the data one-to-two conversion circuit 10 further includes a first inductance network 131 and a first capacitor DC-blocking network 132; the first end of the first inductance network 131 is connected to the input end 121 of the voltage converter 12, and the second end of the first inductance network 131 and the first end of the first capacitor DC-blocking network 132 are both connected to the vehicle-mounted sensor 21 through a first coaxial cable 011; the second end of the first capacitor DC-blocking network 132 is connected to the input end 111 of the switching switch 11, and the output end 122 of the voltage converter 12 is connected to the power supply end 115 of the switching switch 11.

[0085] Among them, the sensing signal of the vehicle-mounted sensor 21 is output in the form of a high-speed serial signal. The first coaxial cable 011 not only transmits this high-speed serial signal but also is used to transmit the power supply signal provided to the camera. The voltage range of this power supply signal can be 8 - 16V, and it is a DC voltage, that is, the power supply signal and the high-speed serial signal are modulated together and transmitted via the first coaxial cable 011. Among them, the high-speed serial signal is an AC signal, and the power supply signal is a DC signal.

[0086] In the prior art, there is no high-speed switching switch that can directly support high voltage, so it is necessary to set up the first inductance network 131 and the first capacitor DC-blocking network 132 to decouple the high-speed serial signal and the power supply signal, and separately extract the high-speed serial signal and the power supply signal. Specifically, the first capacitor isolation network 132 is used to extract the high-speed serial signal and connect it to the input terminal 111 of the switching switch 11; the first inductance network 131 is used to extract the DC voltage to supply power to the vehicle-mounted sensor 21.

[0087] Among them, the circuit structures of the first inductance network 131 and the first capacitor DC-blocking network 132 are exemplarily described below.

[0088] In other embodiments, the power supply line of the vehicle-mounted sensor 21 and the transmission line of the sensing signal can also be set independently of each other. In the circuit structure at this time, the power supply line is only used to transmit the power supply voltage of the vehicle-mounted sensor 21, while the sensing signal is transmitted on another transmission line. That is, the two lines are independent of each other, and their mutual influence is small, so the power supply voltage is relatively stable, and the stability and robustness of the sensing signal are relatively high. When this data one-to-two conversion circuit is applied to a driverless vehicle, it helps to achieve a higher-precision detection of the surrounding environment of the vehicle body within the field of view of the vehicle-mounted sensor.

[0089] On the basis of the above embodiments, a capacitor DC-blocking network can also be set between the switching switch 11 and the controller to further improve the stability and robustness of the sensing signal. The following combines Figure 5 for exemplary illustration.

[0090] In some embodiments, Figure 5 is a schematic structural diagram of another data one-to-two conversion circuit according to an embodiment of the present disclosure. Referring to Figure 5 , this data one-to-two conversion circuit 10 further includes a second capacitor DC-blocking network 142 and a third capacitor DC-blocking network 152; the first end of the second capacitor DC-blocking network 142 is connected to the first control unit 22, and the second end is connected to the first output terminal 113; the first end of the third capacitor DC-blocking network 152 is connected to the second control unit 23, and the second end is connected to the second output terminal 114.

[0091] Among them, the sensing signal output from the first output terminal 113 of the switching switch 11 is transmitted to the first control unit 22 after passing through the second capacitor DC-blocking network 142; the sensing signal output from the second output terminal 114 of the switching switch 11 is transmitted to the second control unit 23 after passing through the third capacitor DC-blocking network 152. Thus, after the DC signal is filtered out by the capacitor DC-blocking network from the sensing signal, only the AC signal (i.e., the high-speed serial signal) is transmitted to the control unit, which is beneficial to improving the stability and robustness of the sensing signal transmitted to the control unit.

[0092] In the above embodiment, the switching control signal can be provided externally, or provided by one of the first control unit 22 and the second control unit 23; the power supply voltage of the switching switch 11 can also be provided externally, or provided by one of the first control unit 22 and the second control unit 23. Exemplary descriptions will be given below in combination with Figure 5 and Figure 6 for illustration.

[0093] In some embodiments, with continued reference to Figure 5 , the switching control signal terminal 112 is connected to the first control unit 22 and the second control unit 23 to receive the switching control signal from the first control unit 22 or the second control unit 23; the voltage comes from the external power supply 16.

[0094] Among them, after the voltage of the external power supply 16 is converted by the voltage converter 12, it is connected to the power supply terminal 115 of the switching switch 11 to supply power to the switching switch. At the same time, after the voltage of the external power supply 16 extracts the DC signal through the first inductor network 131, it is connected to the vehicle-mounted sensor 21 to supply power to the vehicle-mounted sensor 21.

[0095] At the same time, the connection line between the first output terminal 113 of the switching switch 11 and the first control unit 22 is only used to transmit the high-speed serial signal, and there is no power supply voltage coupled on this connection line, thereby reducing the interference of the power supply noise on the high-speed serial signal and improving the stability and robustness of the sensing signal transmitted to the first control unit 22.

[0096] Similarly, the connection line between the second output terminal 114 of the switching switch 11 and the second control unit 23 is only used to transmit the high-speed serial signal, and there is no power supply voltage coupled on this connection line, thereby reducing the interference of the power supply noise on the high-speed serial signal and improving the stability and robustness of the sensing signal transmitted to the second control unit 23.

[0097] Among them, the switching control signal terminal 112 of the switching switch 11 is connected to the first control unit 22 and the second control unit 23, and the first control unit 22 and the second control unit 23 are used to provide the switching control signal to realize the time-sharing transmission of the sensing signal to the first control unit 22 and the second control unit 23.

[0098] Meanwhile, there is no need to additionally set up a circuit structure for providing a switching control signal, which is beneficial to simplifying the circuit structure and facilitating the integrated design of the data one-to-two conversion circuit.

[0099] In other embodiments, the switching control signal may also be output by one of the control units in the first control unit 22 and the second control unit 23, and the embodiments of the present disclosure are not limited thereto.

[0100] In other embodiments, the switching control signal may also be provided by an external switching control circuit, that is, a circuit having corresponding switching control logic corresponding to the sensing signal input requirements of the first control unit 22 and the second control unit 23, and the embodiments of the present disclosure are not limited thereto.

[0101] Figure 5 It is shown in the figure that the voltage is provided by an external power supply. In other embodiments, the voltage may also be provided by the first control unit 22, and the switching control signal may be provided by the second control unit 23. In this way, the circuit structure is further simplified.

[0102] Meanwhile, based on the non-integrated setting of the vehicle-mounted sensor 21 and the data one-to-two conversion circuit 10 in terms of spatial position, that is, there is a certain spatial distance between the two and remote connection is required, it can be set that the first control unit 22 and the switching switch 11 use coaxial cables for transmission, and the second control unit 23 and the switching switch 11 use coaxial cables for transmission. In this way, the number of interconnection wire harnesses can also be reduced, which is beneficial to reducing the wiring difficulty. The following combines Figure 6 for exemplary illustration.

[0103] In some embodiments, Figure 6 is a schematic structural diagram of another data one-to-two conversion circuit according to an embodiment of the present disclosure. Referring to Figure 6 , the data one-to-two conversion circuit 10 further includes a second inductance network 141 and a third inductance network 151; the first ends of the second inductance network 141 and the second capacitor DC blocking network 142 are both connected to the first control unit 22 through a second coaxial cable 012, and the second end of the second inductance network 141 is connected to the input end of the voltage converter 12 and the first end of the first inductance network 131; the first ends of the third inductance network 151 and the third capacitor DC blocking network 152 are both connected to the second control unit 23 through a third coaxial cable 013, and the second end of the third inductance network 151 is connected to the switching control signal terminal 112 of the switching switch 11.

[0104] Among them, the power supplies for the vehicle-mounted sensor 21 and the switching switch 11 are both provided by the first control unit 22. The first control unit 22 is connected to the second inductance network 141 through the second coaxial cable 012. After the power supply voltage is extracted by the second inductance network 141, the power supply voltage first passes through the voltage converter 12, is converted into a low voltage to supply power to the switching switch 11. At the same time, after passing through the first inductance network 131, it supplies power to the vehicle-mounted sensor 21. Since the connection between the vehicle-mounted sensor 21 and the switching switch 11 still uses a coaxial cable (i.e., the first coaxial cable 011) for connection, to supply power to the vehicle-mounted sensor 21, it is also necessary to pass through a reverse capacitor DC-blocking network, be recoupled with the high-speed serial signal together, and then be transmitted to the vehicle-mounted sensor 21 through the first coaxial cable 011.

[0105] At this time, there is only one interconnection wire harness between the first control unit 22 and the switching switch 11, that is, the second coaxial cable 012, and there is only one interconnection wire harness between the switching switch 11 and the vehicle-mounted sensor 21, that is, the first coaxial cable 011.

[0106] At the same time, the second control unit 23 is connected to the third inductance network 151 through the third coaxial cable 013. After the DC voltage is extracted by the third inductance network 141, the state of the presence or absence of this DC voltage can be used to achieve logical "0" and "1" controls, so as to achieve the time-sharing output control of the switching switch 11.

[0107] Exemplarily, when the second control unit 23 works, it requires the sensing signal input of the vehicle-mounted sensor 21. At this time, the second control unit 23 is powered on, the third coaxial cable 013 is powered on. After passing through the third inductance network 151, the DC voltage is extracted, the switching control signal terminal 112 is pulled high, and the sensing signal is output from the second output terminal 114. After extracting the AC signal through the third capacitor DC-blocking network 152, it is transmitted to the second control unit 23, that is, the sensing signal input requirement of the second control unit 23 is satisfied.

[0108] When the second control unit 23 does not work, it does not require the sensing signal input of the vehicle-mounted sensor 21, and the first control unit 22 requires the sensing signal input. At this time, the second control unit 23 is powered off, and the third coaxial cable 013 will also be powered off. The third inductance network 151 cannot extract the DC voltage, the switching control signal terminal 112 is pulled low, the sensing signal is switched, and is output from the first output terminal 113. After extracting the AC signal through the second capacitor DC-blocking network 142, it is transmitted to the first control unit 22, that is, the sensing signal input requirement of the first control unit 22 is satisfied.

[0109] Thus, there is only one interconnection wire harness between the second control unit 23 and the switching switch 11, that is, the third coaxial cable 013.

[0110] In Figure 6In the shown data one - to - two conversion circuit, there is no need to additionally set a power supply and a switching control signal source. Only three coaxial cables are used to provide voltage and switching control signals by the control unit, so that the circuit structure is simple and easy to integrate. At the same time, the time - division switching output of the sensing signal is realized by the physical switching of the switching switch 11, avoiding the modification of the vehicle - mounted sensor interface program at the control unit end. When applying this data one - to - two conversion circuit to a data one - to - two conversion system, it is beneficial to reduce the overall design difficulty of the system.

[0111] In the above - mentioned embodiment, the data one - to - two conversion circuit 10 can be arranged on a board. The vehicle - mounted sensor 21, the first control unit 22 and the third control unit 23 can all be connected to the data one - to - two conversion circuit 10 through the interface of the board.

[0112] On the basis of the above - mentioned embodiment, the high - speed serial signal can also be converted into a differential signal and then input into the data one - to - two conversion circuit to suppress the differential - mode interference suffered by the traces on the circuit board, thereby improving the transmission stability and robustness of the high - speed serial signal.

[0113] In some embodiments, for the high - speed serial signal extracted by the first capacitor DC - blocking network 132, it is converted into a differential signal for transmission at the board entrance and then transmitted to the switching switch 11 that can support the one - to - two splitting of high - speed serial differential signals, thus realizing the one - to - two output of the sensing signal. The switched sensing signal output is also in the differential signal output mode. After passing through the second capacitor DC - blocking network 142 or the third capacitor DC - blocking network 152, it is converted into a single - ended signal at the board exit and transmitted to the control unit through the interconnection harness.

[0114] Thus, the sensing signals transmitted by the input terminal 111, the first output terminal 113 and the second output terminal 114 of the switching switch 11 can all be differential signals.

[0115] In the above - mentioned embodiment, the inductance network and the capacitor isolation network can adopt any circuit structure known to those skilled in the art and can be set according to the requirements of the data one - to - two conversion circuit. The embodiments of the present disclosure are not limited thereto.

[0116] In some embodiments, the inductance network and the capacitor isolation network can adopt Figure 7 the structure of the capacitor - inductance network shown. Referring to Figure 7 , the capacitor DC - blocking network isolates the DC power supply part and extracts the AC signal, and the inductance network isolates the AC signal part and extracts the DC signal.

[0117] In other embodiments, the inductance network and the capacitor isolation network can also adopt other capacitor - inductance network structures.

[0118] In the above implementation, the switch 11 can be any switch known to those skilled in the art that meets the above signal transmission rate requirements and data one-to-two conversion requirements. In some embodiments, the switch 11 can be a HD3SS323-Q1 switch.

[0119] In other embodiments, the switch 11 may also be configured according to the requirements of the data one-to-two conversion circuit, which is not limited in the embodiments of the present disclosure.

[0120] In the above embodiment, when the vehicle-mounted sensor 21 (such as a camera) is powered on and used, parameter configuration is required, and the configuration method can be achieved through a low-speed control signal, and the low-speed control signal can also be coupled in the coaxial cable to form a low-speed control channel. Thus, the high-speed serial signal corresponding to the sensor signal, the low-speed control signal corresponding to the parameter configuration, and the power supply voltage signal (or the switching control signal corresponding to the switching control of the switching switch 11) can be coupled together on the coaxial cable to reduce the number of interconnected wiring harnesses.

[0121] Based on this, when it is necessary to configure the parameters of the vehicle-mounted sensor, the vehicle-mounted sensor can be configured through the above-mentioned low-speed control channel. The signal flow direction of the low-speed control signal flows from the control unit to the vehicle-mounted sensor, and the signal flow direction of the high-speed serial signal corresponding to the sensor signal is in the opposite direction.

[0122] The data one-to-two conversion circuit provided by the embodiment of the present disclosure includes a switch 11, which can output the sensing signal of the vehicle-mounted sensor 21 to the first control unit 22 and the second control unit 23 in time-sharing based on the switching control signal, thereby realizing the time-sharing sharing of the sensing signal between the first control unit 22 and the third control unit 23. In this way, the number of vehicle-mounted sensors 21 that need to be set can be reduced, which is conducive to reducing the installation difficulty of the vehicle-mounted sensor 21 and reducing the wiring difficulty of the related wiring. Further, the switch 11 is provided to be powered by the first control unit 22, and the switching control signal is provided by the second control unit 23, so that there is no need to set up an additional power supply and a switching control signal source, and the first control unit 22 and the second control unit 23 can be connected to the switch 11 by a coaxial cable, so that the circuit structure can be simplified, the number of wiring can be reduced, and the wiring difficulty can be reduced. In parallel, the switch 11 can be powered by an external power supply, and the sensing signal and the switch control signal are transmitted by independent lines, so that the mutual interference between the signals can be reduced, which is conducive to ensuring the stability of each signal, thereby realizing effective control and accurate detection.

[0123] Based on the above embodiments, the embodiments of the present disclosure further provide a data one-to-two conversion system (hereinafter may be simply referred to as "system"), and the data one-to-two conversion system may include any one of the data one-to-two conversion circuits provided in the above embodiments. Therefore, the data one-to-two conversion system also has the beneficial effects of any one of the above data one-to-two conversion circuits. The same parts can be understood with reference to the explanations of the data one-to-two conversion circuit in the above text, and will not be elaborated hereinafter.

[0124] In some embodiments, Figure 8 is a schematic structural diagram of a data one-to-two conversion system according to an embodiment of the present disclosure. Refer to Figure 8 , the data one-to-two conversion system 20 includes: a conversion circuit; a vehicle-mounted sensor 21 connected to the input end of the switching switch 11; a first control unit 22 connected to the first output end 113 of the switching switch 11; a second control unit 23 connected to the second output end 114 of the switching switch 11; wherein, under the control of a switching control signal, the switching switch 11 outputs the sensing signal to the first control unit 22 or the second control unit 23 in a time-sharing manner.

[0125] Among them, the conversion circuit may adopt any one of the above data one-to-two conversion circuits 10.

[0126] Among them, the sensing signal collected by the vehicle-mounted sensor 21 is transmitted to the switching switch 11, and the switching switch 11, based on the control of the switching control signal, selects the first output end 113 or the second output end 114 for output in a time-sharing manner, that is, the sensing signal is output to the first control unit 22 or the second control unit 23 in a time-sharing manner. Thus, the sensing signal of the vehicle-mounted sensor 21 is shared between the first control unit 22 and the second control unit 23, so that it is not necessary to set up independent vehicle-mounted sensors 21 for the first control unit 22 and the third control unit 23, the number of vehicle-mounted sensors 21 in the system can be reduced, the system structure can be simplified, the installation difficulty of the vehicle-mounted sensor 21 can be reduced, and the wiring difficulty of the related wiring can be reduced.

[0127] At the same time, the sensing signal of the vehicle-mounted sensor 21 in the system is output to the first control unit 22 or the second control unit 23 in a time-sharing manner through the data one-to-two conversion circuit 10, that is, a physical switching method is adopted for switching, thus avoiding the modification of the vehicle-mounted sensor interface program at the control unit end and reducing the system design difficulty.

[0128] Exemplarily, when the data one-to-two conversion circuit 10 adopts Figure 5When the circuit structure shown is adopted, both the switching switch 11 and the vehicle-mounted sensor 21 are powered by the external power supply 16. The switching control signal of the switching switch 11 is provided by the first control unit 22 and the second control unit 23, and is transmitted independently of the sensing signal. Based on this, the sensing signal is less affected by the power supply voltage and the switching control signal, which is beneficial to ensuring the stability and robustness of the sensing signal.

[0129] Exemplarily, when the data one-to-two conversion circuit 10 adopts Figure 6 the circuit structure shown, both the switching switch 11 and the vehicle-mounted sensor 21 are powered by the first control unit 22. The switching control signal of the switching switch 11 is provided by the second unit 23 and is transmitted through the coaxial cable with the sensing signal. Based on this, it is not necessary to add additional power supply wire harnesses and control wire harnesses. It is only necessary to disconnect the original vehicle-mounted sensor wire harness in the system and connect the data one-to-two conversion circuit, reducing the number of interconnection wire harnesses in the system, simplifying the system structure, and reducing the layout difficulty of the system.

[0130] In other embodiments, the switching control signal source can also be independently set in this system. The switching switch 11 and the vehicle-mounted sensor 21 are powered by the first control unit 22 or by the second control unit 23; or it is set in this system that the switching switch 11 and the vehicle-mounted sensor 21 are independently powered by the external power supply, and the switching control signal is provided by the first control unit 22 or the second control unit 23, which can be set according to the needs of the system, and the embodiments of the present disclosure are not limited thereto.

[0131] In some embodiments, Figure 9 is a schematic structural diagram of another data one-to-two conversion system according to an embodiment of the present disclosure, Figure 10 is a schematic structural diagram of yet another data one-to-two conversion system according to an embodiment of the present disclosure. On the basis of Figure 8 , with reference to Figure 9 or Figure 10 , the vehicle-mounted sensor 21 is a camera 210.

[0132] Among them, the sensing signal collected by the camera 210 is video data, and this video data can be shared between the two control units, so that the number of cameras 210 in this system can be reduced, the installation difficulty of the cameras 210 can be reduced, and the wiring difficulty of the related wiring can be reduced.

[0133] In other embodiments, the vehicle-mounted sensor 21 can also be other types of sensors known to those skilled in the art, and the embodiments of the present disclosure are not limited thereto.

[0134] On the basis of the above embodiments, the number of cameras 210 can be 1, 2, or more, which can be set according to the needs of the system, and the embodiments of the present disclosure are not limited thereto.

[0135] When the number of cameras 210 is two or more, it can be set according to the system requirements that the video data of some cameras 210 is shared, or it can be set that the video data of all cameras 210 is shared. The embodiments of the present disclosure do not limit this, and will be described below in conjunction with Figure 11 and Figure 12 for exemplary illustration.

[0136] In some embodiments, Figure 11 is a schematic structural diagram of another data one-to-two conversion system according to an embodiment of the present disclosure, Figure 12 is a schematic structural diagram of another data one-to-two conversion system according to an embodiment of the present disclosure. On the basis of Figure 8 Combined with Figure 11 and Figure 12 , the number of switching switches 11 is N, the number of cameras 210 is M, both M and N are positive integers, and M≥N; the first control unit 22 includes M sensing signal receiving ends, and the second control unit 23 includes N sensing signal receiving ends; wherein, the sensing signals of N cameras 210 are transmitted to the first control unit 22 and the second control unit 23 in a time-sharing manner, and the sensing signals of the remaining M-N cameras 210 are only transmitted to the first control unit 22.

[0137] Among them, the first control unit 22 has an input requirement for the video data of M cameras 210, and the second control unit 23 has an input requirement for the data of N cameras 210. In this system, by setting the video data of N cameras 210 to be shared by the first control unit 22 and the second control unit 23 in a time-sharing manner, M cameras 210 can be set, so that the video data input requirements of both the first control unit 22 and the second control unit 23 can be satisfied at the same time. Therefore, compared with the system setting method that requires M+N cameras 210 in the prior art, the system of this embodiment can reduce N cameras 210, the number of cameras 210 is less, and the interconnection wire harnesses are less; thus, the installation difficulty of the cameras 210 can be reduced, and the wiring difficulty of the related wiring can be reduced.

[0138] Exemplarily, Figure 11 exemplarily shows that M=N, that is, the number of cameras 210 and the number of switching switches are both N, and the video data of these N cameras 210 are shared by the first control unit 22 and the second control unit 23 in a time-sharing manner. Compared with the prior art, the number of cameras 210 is halved.

[0139] Exemplarily, Figure 12 exemplarily shows that M>N, that is, the number of cameras 210 is greater than the number of switching switches. Among these M cameras 210, the video data of N cameras 210 are shared by the first emptying unit 22 and the second control unit 23 in a time-sharing manner, and the video data of the remaining M-N cameras 210 are only transmitted to the first control unit 22.

[0140] Based on this, when the number of sensing signal receiving ends of the first control unit 22 is not equal to that of the second control unit 23, the number of switching switches can be determined based on the control unit with fewer sensing signal receiving ends. Optionally, the number of switching switches is equal to the number of sensing signal receiving ends of this control unit; the number of cameras 210 can be determined based on the control unit with more sensing signal receiving ends. Optionally, the number of cameras 210 is equal to the number of sensing signal receiving ends of this control unit. Based on this, each switching switch can correspondingly share the video data of one camera 210 time-divisionally to two control units, thereby reducing the number of cameras 210.

[0141] In other embodiments, if the number of cameras 210 is greater than the number of switching switches, in addition to the data of the cameras 210 equal to the number of switching switches being time-divisionally shared between the first control unit and the second control unit through their corresponding switching switches; among the remaining cameras 210, the data of a part of the cameras 210 can be transmitted only to the first control unit, and the data of another part of the cameras 210 can be transmitted only to the second control unit, which can be set according to the requirements of the system, and the embodiments of the present disclosure do not limit this.

[0142] In other embodiments, when the number of control units is 3 or more, the video data of a single camera 210 can also be time-divisionally shared by any two control units, which can be set according to the requirements of the system, and the embodiments of the present disclosure do not limit this.

[0143] Next, taking N = 2 and M = 4 as an example, the system will be exemplarily described in combination with an application scenario.

[0144] In some embodiments, the first control unit 22 is an unmanned driving controller, and the second control unit 23 is an ADAS controller.

[0145] Combined with the above, when the first control unit 22 is an unmanned driving controller, it requires the input of video data from at least 6 cameras around the vehicle body; when the second control unit 23 is an ADAS controller, it requires the input of video data from at least 4 cameras around the vehicle body. Based on this, the system can be configured with a total of 6 cameras, among which the video data of 4 cameras is time-divisionally shared by the ADAS controller and the unmanned driving controller, and the video data of the remaining 2 cameras is only transmitted to the unmanned driving controller.

[0146] For a 4-channel camera whose video data is shared, by controlling the switching switch, the switching operation of transmitting the video data to the L2 controller or the L4 controller can be realized. After the path is switched to the corresponding controller, it is equivalent that the physical path of the controller is directly connected to the camera side, and the direct control of the camera by the controller is also realized, reducing the intermediate transfer link.

[0147] Among them, for the camera, the communication between the camera, the switching switch and the controller can adopt the POC method, that is, the power supply of the camera and the transmission of video data are carried out on the coaxial cable. The coaxial cable can not only transmit video data, but also transmit the power supply voltage to the camera and the switching switch. In this way, the number of interconnection wire harnesses between the camera and the switching switch, and between the switching switch and the controller can be reduced.

[0148] The power supply of the camera comes from the voltage transmitted by the coaxial cable of the driverless controller. When a data one-to-two conversion circuit is introduced, the coaxial cable of the driverless controller is connected to the second inductance network of the data one-to-two conversion circuit, and the DC voltage is extracted through the second inductance network as a power signal. This power signal passes through a voltage converter and is converted into a low voltage to supply power to the switching switch; at the same time, after passing through the first inductance network, it is output through the coaxial cable to supply power to the camera. On this basis, the camera and the data one-to-two conversion circuit adopt a connection method of a single coaxial cable. Therefore, the power supply voltage provided to the camera also needs to pass through a reverse capacitor DC blocking network, be recoupled with the high-speed serial signal, and be transmitted to the camera through a coaxial cable (i.e., the first coaxial cable in the above text).

[0149] Furthermore, in order to reduce the number of connection wire harnesses between the switching switch and the controller, the switching method can be: extracting the DC voltage through the inductance network in the POC power supply transmitted by the ADAS controller, and using the presence or absence of this DC voltage to realize the switching of the controller. The control logic can be: when the ADAS controller is powered on and requires the video data input of the camera, there will be power on the POC, the switching control signal terminal of the switching switch is pulled high, and the video data is transmitted to the ADAS controller; when the ADAS controller does not work, the power supply is disconnected, that is, the video data input of the camera is not required, the POC is powered off synchronously, the switching control signal terminal of the switching switch becomes low, and the video data is transmitted to the driverless controller.

[0150] In this way, the time-sharing sharing of the video data of the camera between the driverless controller and the ADAS controller is realized. At the same time, there is no need to increase additional power supply and control wire harnesses. It only needs to disconnect the original camera wire harness in the system and connect this switching switch, which simplifies the system structure and reduces the system complexity.

[0151] Meanwhile, for the controller side, the video data of the camera is realized by physical switching to achieve time-sharing sharing, which is no different from the original separate control method, thus avoiding the modification of the camera interface program on the controller side.

[0152] In summary, using six cameras and four data one-to-two conversion circuits meets the input requirements of the video data of the ADAS controller and the driverless controller.

[0153] In some embodiments, the level of the driverless controller can be L3 level, L4 level or above L4 level, and the level of the ADAS controller can be L1 level or L2 level.

[0154] Exemplarily, in an actual product, the level of the ADAS controller is L2 level, and the level of the driverless controller is L4 level; or, the level of the ADAS controller is L2 level, and the level of the driverless controller is above L4 level.

[0155] In other embodiments, the first control unit 22 and the second control unit 23 can also be any two control units that require time-sharing input of the sensing signals of the vehicle-mounted sensor 21 (such as a camera), and the embodiments of the present disclosure are not limited thereto.

[0156] The data one-to-two conversion system provided by the embodiments of the present disclosure can realize the one-to-two output of the sensing signals of the vehicle-mounted sensors, that is, the sensing signals of at least some vehicle-mounted sensors can be time-sharing shared among different control units, reducing the number of vehicle-mounted sensors, having a simple circuit structure, and without changing the system camera control process; at the same time, the actual vehicle application has less modification, just connect the vehicle-mounted sensor to the data one-to-two conversion circuit, with a small installation difficulty and a low wiring difficulty for the relevant wiring.

[0157] Based on the above embodiments, the embodiments of the present disclosure also provide a driverless vehicle, which includes any one of the data one-to-two conversion systems provided by the above embodiments. Therefore, this driverless vehicle also has the beneficial effects of the data one-to-two conversion circuit and system in the above embodiments. The same parts can be understood by referring to the explanation of the data one-to-two conversion circuit and system in the above text, and will not be repeated hereinafter.

[0158] In other embodiments, the driverless vehicle may further include other structural components known to those skilled in the art, and the embodiments of the present disclosure do not elaborate or limit this.

[0159] It should be noted that in this text, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the existence of additional identical elements in the process, method, article or device comprising the said element.

[0160] The above are only specific embodiments of the present disclosure, enabling those skilled in the art to understand or implement the present disclosure. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present disclosure. Therefore, the present disclosure will not be limited to these embodiments described herein, but rather will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A data one-to-two conversion circuit, characterized in that Comprising: A switching switch, including an input end, a switching control signal end, a first output end, and a second output end; The input end is connected to the vehicle-mounted sensor for receiving the sensing signal of the vehicle-mounted sensor; The switching control signal end, based on the switching control signal, selects the first output end or the second output end for output in a time-sharing manner; The first output end is connected to the first control unit; The second output end is connected to the second control unit; Wherein, the signal transmission rate of the switching switch is equal to or greater than the rate at which the vehicle-mounted sensor sends the sensing signal; The switching switch further includes a power supply end; the power supply end is connected to a voltage converter, and a voltage is input to the input end of the voltage converter; The data one-to-two conversion circuit further includes: a first inductance network and a first capacitor DC-blocking network; The first end of the first inductance network is connected to the input end of the voltage converter, and the second end of the first inductance network and the first end of the first capacitor DC-blocking network are both connected to the vehicle-mounted sensor through a first coaxial cable; The second end of the first capacitor DC-blocking network is connected to the input end of the switching switch, and the output end of the voltage converter is connected to the power supply end of the switching switch; Wherein, the switching control signal is a pulse signal including a first level and a second level; when the switching control signal is the first level, the sensing signal is transmitted from the first output end to the first control unit, and when the switching control signal is the second level, the sensing signal is transmitted from the second output end to the second control unit.

2. The data split-into-two conversion circuit according to claim 1, wherein The voltage converter is a low-dropout linear regulator.

3. The data splitting circuit according to claim 1, wherein It further includes a second capacitor DC-blocking network and a third capacitor DC-blocking network; The first end of the second capacitor DC-blocking network is connected to the first control unit, and the second end is connected to the first output end; The first end of the third capacitor DC-blocking network is connected to the second control unit, and the second end is connected to the second output end.

4. The data splitting circuit according to claim 3, wherein The switching control signal end is connected to the first control unit and the second control unit to receive the switching control signal from the first control unit or the second control unit; the voltage comes from an external power supply.

5. The data split-into-two conversion circuit according to claim 3, wherein It further includes a second inductance network and a third inductance network; The first end of the second inductance network and the first end of the second capacitor DC-blocking network are both connected to the first control unit through a second coaxial cable, and the second end of the second inductance network is connected to the input end of the voltage converter and the first end of the first inductance network; The first end of the third inductance network and the first end of the third capacitor DC-blocking network are both connected to the second control unit through a third coaxial cable, and the second end of the third inductance network is connected to the switching control signal end of the switching switch.

6. The data splitting circuit according to claim 1, wherein The sensing signals transmitted by the input end, the first output end, and the second output end of the switching switch are all differential signals.

7. The data split-into-two conversion circuit according to claim 1, wherein The signal transmission rate of the switching switch is equal to or greater than 1.4 Gbps.

8. A data one-to-two conversion system, characterized in that, Comprising: A conversion circuit, adopting the data one-to-two conversion circuit according to any one of claims 1-7; A vehicle-mounted sensor, connected to the input end of the switching switch; A first control unit, connected to the first output end of the switching switch; A second control unit, connected to the second output terminal of the switching switch; Wherein, under the control of the switching control signal, the switching switch outputs the sensing signal to the first control unit or the second control unit at different times.

9. The data split-into-two conversion system according to claim 8, wherein The vehicle-mounted sensor is a camera.

10. The data splitting and converting system according to claim 9, characterized in that, The number of the switching switches is N, and the number of the cameras is M. Both M and N are positive integers, and M≥N; The first control unit includes M sensing signal receiving terminals, and the second control unit includes N sensing signal receiving terminals; Wherein, the sensing signals of N cameras are transmitted to the first control unit and the second control unit at different times, and the sensing signals of the remaining M-N cameras are only transmitted to the first control unit.

11. The data split-into-two conversion system according to claim 8, characterized in that, The first control unit is an unmanned driving controller, and the second control unit is an ADAS controller.

12. The data one-for-two conversion system according to claim 11, wherein The level of the unmanned driving controller is L3 level, L4 level or above L4 level, and the level of the ADAS controller is L1 level or L2 level.

13. An autonomous vehicle, characterized in that, Including the data one-to-two conversion system according to any one of claims 8-12.

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