Vehicle-mounted radar system

Abstract

The embodiment of the utility model provides a vehicle-mounted radar system. The system comprises a plurality of radar probes with DSI3 communication interfaces; the radar controller is provided with a communication chip, and the communication chip establishes DSI3 communication connection with each radar probe through a DSI3 communication port; the power supply module is used for supplying power to each radar probe; wherein the plurality of radar probes are averagely divided into a plurality of groups, the number of the groups is the same as the total number of the DSI3 communication ports in the radar controller, the DSI3 communication interfaces of the radar probes in the same group are connected to the same DSI3 communication port, and the DSI3 communication interfaces of the radar probes in different groups are connected with different DSI3 communication ports; the number of the power supply modules is the same as the number of the radar probes included in one group of radar probes, the power interface of each radar probe is connected to one power supply module, and the radar probes of the batch connected to the same power supply module belong to different groups. According to the embodiment of the utility model, the address code of each radar probe can be conveniently determined with low cost.

Description

Technical Field

[0001] The embodiment of the utility model relates to the technical field of motor vehicle radar, and in particular to a vehicle-mounted radar system. Background Art

[0002] At present, existing motor vehicle on-board radar systems usually use multiple radar probes to detect obstacle information. In order to facilitate the determination of the detection direction of each radar probe and the radar detection data at the detection direction, it is necessary to perform necessary configuration on each radar probe installed on the motor vehicle before leaving the factory to determine the unique address code corresponding to each radar probe.

[0003] As the technology of radar probes becomes more mature, existing vehicle-mounted radar systems have adopted radar probes based on the DSI3 communication method. Compared with radar probes with other communication methods, they have the advantages of a wider detection range and higher detection accuracy, and can also maintain stable communication performance in complex environments.

[0004] However, the inventors discovered in the specific implementation that the wiring method of the radar probe based on the DSI3 communication method is as follows: the radar controller is provided with a DSI3 communication port, and one DSI3 communication port can only connect one radar probe to configure the address code of the radar probe. One DSI3 communication port is not compatible with a larger number of radar probes. Therefore, it is necessary to add more DSI3 communication ports to the radar controller for connecting each radar probe separately. This is not conducive to controlling the number and length of vehicle body wiring harnesses, resulting in an increase in the wiring harness cost of the entire vehicle. Utility Model Content

[0005] The technical problem to be solved by the embodiments of the utility model is to provide a vehicle-mounted radar system that can determine the address code of each radar probe installed on a motor vehicle at a low cost and conveniently.

[0006] In order to solve the above technical problems, the embodiment of the utility model adopts the following technical solution: a vehicle-mounted radar system, comprising:

[0007] A plurality of radar probes respectively assembled at predetermined positions on the motor vehicle, wherein the radar probes have a DSI3 communication interface;

[0008] A radar controller, used for connecting and controlling each of the radar probes, the radar controller comprising a communication chip having at least two DSI3 communication ports, the communication chip establishing a DSI3 communication connection with each of the radar probes through the DSI3 communication ports; and

[0009] A power supply module, connected to the vehicle power supply, the radar controller and the radar probe, respectively, for supplying power to each of the radar probes using the vehicle power supply under the control of the radar controller;

[0010] Among them, multiple radar probes are evenly divided into several groups and the number of groups is the same as the total number of DSI3 communication ports in the radar controller, the DSI3 communication interfaces of radar probes in the same group are connected to the same DSI3 communication port, and the DSI3 communication interfaces of radar probes in different groups are connected to different DSI3 communication ports; the number of power supply modules is the same as the number of radar probes included in a group of radar probes, the power interface of each radar probe is connected to one power supply module, and each radar probe in a batch connected to the same power supply module belongs to different groups.

[0011] Furthermore, the radar controller further includes:

[0012] A storage unit, used to pre-store a configuration code of a motor vehicle, wherein the configuration code at least includes information about the vehicle model, the number of radar probes, and address code information of each radar probe; and

[0013] The micro control unit is connected to the communication chip, the storage unit and the power supply module respectively, and is used to generate a control signal in an initial format, receive and process a feedback signal uploaded by the communication chip, and control the on / off state of the power supply module.

[0014] Furthermore, the power supply module includes a transistor Q1 and a MOS transistor Q2, wherein:

[0015] The input end of the transistor Q1 is connected to the control end of the MOS transistor Q2 through the first resistor R1, the output end of the transistor Q1 is connected to the ground end, and the control end of the transistor Q1 is connected to the enable pin of the micro control unit;

[0016] The input end of the MOS tube Q2 is connected to the vehicle power supply on the one hand, and is connected to the control end of the MOS tube Q2 through the second resistor R2 on the other hand. The output end of the MOS tube Q2 is connected to the power supply port for powering the radar probe through the sliding resistor R3.

[0017] Furthermore, the line between the sliding resistor R3 and the power supply port is also connected to the ground terminal through the series body of the fourth resistor R4 and the fifth resistor R5 and is connected to the ground terminal through the first capacitor C1. The line between the fourth resistor R4 and the fifth resistor R5 serves as a voltage sampling point and is connected to the voltage sampling port corresponding to the voltage sampling pin of the micro control unit through the sixth resistor R6. The line between the sixth resistor R6 and the voltage sampling port is also connected to the ground terminal through the second capacitor C2.

[0018] Furthermore, the radar controller is provided with two communication chips, each communication chip has two DSI3 communication ports, and each DSI3 communication port is connected to the same number of radar probes.

[0019] Furthermore, the initial format is an SPI format.

[0020] By adopting the above technical scheme, the embodiment of the utility model has at least the following beneficial effects: the embodiment of the utility model divides the plurality of radar probes into several groups evenly, each DSI3 communication port establishes a DSI3 communication connection with the DSI3 communication interface of the corresponding group of radar probes, and also sets power supply modules equal to the number of radar probes included in a group of radar probes, so that the power interface of each radar probe is connected to one power supply module, and each power supply module is responsible for supplying power to each radar probe of a batch belonging to different groups, and then the radar controller can power on or off the radar probes of each group by controlling the conduction state of the corresponding power supply module. When the power supply module is turned on, the radar probe of the corresponding group can complete addressing according to the control signal in the DSI3 format sent by the radar controller through the DSI3 communication port on the communication chip, thereby achieving that one DSI3 communication port is compatible with a larger number of radar probes and can effectively configure the address code of the radar probe, and can reduce the number and length of the wiring harness used, thereby reducing the wiring harness cost of the whole vehicle. The embodiment of the utility model can determine the address code of each radar probe installed on the motor vehicle at a low cost and conveniently. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The utility model is an optional embodiment of the vehicle-mounted radar system, which includes a schematic structural diagram of 12 radar probes.

[0022] Figure 2 A control block diagram of a radar controller of an optional embodiment of the vehicle-mounted radar system of the utility model.

[0023] Figure 3 A circuit diagram of a power supply module of an optional embodiment of the vehicle-mounted radar system of the utility model.

[0024] Figure 4 The utility model is a schematic diagram of the process steps of an optional embodiment of the radar probe automatic addressing method. DETAILED DESCRIPTION

[0025] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the following exemplary embodiments and descriptions are only used to explain the present invention and are not intended to limit the present invention. In addition, the embodiments and features in the embodiments of the present invention may be combined with each other without conflict.

[0026] like Figure 1-Figure 3 As shown, an optional embodiment of the utility model provides a vehicle-mounted radar system, including:

[0027] A plurality of radar probes 1 respectively assembled at predetermined positions on a motor vehicle, wherein the radar probes 1 have a DSI3 communication interface 11;

[0028] A radar controller 3, used for connecting and controlling each of the radar probes 1, the radar controller 3 comprising a communication chip 31 having at least two DSI3 communication ports 30, the communication chip 31 establishing a DSI3 communication connection with each of the radar probes 1 through the DSI3 communication ports 30; and

[0029] A power supply module 5 is connected to the vehicle power supply 6, the radar controller 3 and the radar probe 1 respectively, and is used to use the vehicle power supply 6 to supply power to each radar probe 1 under the control of the radar controller 3;

[0030] Among them, multiple radar probes 1 are evenly divided into several groups and the number of groups is the same as the total number of DSI3 communication ports 30 in the radar controller 3, the DSI3 communication interfaces 11 of the radar probes 1 in the same group are all connected to the same DSI3 communication port 30, and the DSI3 communication interfaces 11 of the radar probes 1 in different groups are connected to different DSI3 communication ports 30; the number of the power supply modules 5 is the same as the number of radar probes 1 included in a group of the radar probes 1, the power interface 13 of each of the radar probes 1 is connected to one of the power supply modules 5, and a batch of each of the radar probes 1 connected to the same power supply module 5 belongs to different groups.

[0031] The embodiment of the utility model divides the plurality of radar probes 1 into a plurality of groups on average, each DSI3 communication port 30 establishes a DSI3 communication connection with the DSI3 communication interface 11 of the corresponding group of radar probes 1, and also sets power supply modules 5 with the same number as the radar probes 1 included in a group of radar probes 1, the power supply interface 13 of each radar probe 1 is connected to one power supply module 5, and each power supply module 5 is responsible for supplying power to a batch of each radar probe 1 belonging to different groups, and then the radar controller 3 can power on or off the radar probes 1 of each group by controlling the conduction state of the corresponding power supply module 5. When the power supply module 5 is turned on, the radar probes 1 of the corresponding group can complete addressing according to the control signal in the DSI3 format sent by the radar controller 3 through the DSI3 communication port 30 on the communication chip 31, thereby achieving that one DSI3 communication port 30 is compatible with a larger number of radar probes 1 and can effectively configure the address code of the radar probe 1, reducing the number and length of wire harnesses used, and reducing the cost of the whole vehicle wire harness, so that the address code of each radar probe 1 installed on the motor vehicle can be determined at a low cost and conveniently.

[0032] It should be noted that the communication chip 31 has a format conversion function, which can be used to convert the control signal in the initial format into the DSI3 format and then send it out through the DSI3 communication port 30, as well as receive the feedback signal in the DSI3 format sent back by each radar probe 1 through the DSI3 communication port 30 and convert the feedback signal into the initial format before uploading, so that the radar controller 3 can communicate with the radar probe 1 based on the DSI3 communication mode with the help of the communication chip 31, which is conducive to the platformization of the radar probe 1 based on the DSI3 communication; in specific implementation, the communication chip 31 can be purchased through existing electronic components on the market, such as the E521.42 communication chip 31; and the radar probe 1 based on the DSI3 communication can adopt the AK2 radar.

[0033] In another embodiment of the present invention, Figure 1 and Figure 2 As shown, the radar controller 3 also includes:

[0034] The storage unit 33 is used to pre-store the configuration code of the motor vehicle, wherein the configuration code at least includes the vehicle model information, the number of radar probes 1 and the address code information of each radar probe 1; and

[0035] The micro control unit 35 is connected to the communication chip 31 , the storage unit 33 and the power supply module 5 , respectively, and is used to generate a control signal in an initial format, receive and process a feedback signal uploaded by the communication chip 31 , and control the on / off state of the power supply module 5 .

[0036] In this embodiment, the storage unit 33 pre-stores the configuration code having the model of the motor vehicle and the number and parameter information of the radar probe 1 corresponding to the model, and after the micro control unit 35 receives the configuration information request from the radar probe 1, the configuration code is sent to the radar probe 1 to initialize the radar probe 1. Different configurations can be performed according to different motor vehicle models, thereby improving the versatility of the radar probe 1.

[0037] In another embodiment of the present invention, Figure 1-Figure 3 As shown, the power supply module 5 includes a transistor Q1 and a MOS transistor Q2, wherein:

[0038] The input end of the transistor Q1 is connected to the control end of the MOS transistor Q2 through the first resistor R1, the output end of the transistor Q1 is connected to the ground end, and the control end of the transistor Q1 is connected to the enable pin 351 of the micro control unit 35;

[0039] The input end of the MOS tube Q2 is connected to the vehicle power supply 6 on the one hand, and is connected to the control end of the MOS tube Q2 through the second resistor R2 on the other hand. The output end of the MOS tube Q2 is connected to the power supply port 51 for powering the radar probe 1 through the sliding resistor R3.

[0040] In this embodiment, the enable pin 351 of the microcontroller unit 35 outputs a corresponding level signal to control the conduction of the transistor Q1, thereby turning on the MOS tube Q2, and the vehicle power supply 6 supplies power to the radar probe 1; the control principle of the microcontroller unit 35 in this embodiment is simple, and can be implemented using a conventional single-chip microcomputer. It can effectively control the on and off states of the power supply modules 5 of different paths, and facilitate the power-on addressing of each of the radar probes 1 connected to the power supply module 5.

[0041] In another embodiment of the present invention, Figure 1-Figure 3As shown, the line between the sliding resistor R3 and the power supply port 51 is also connected to the ground terminal through the series body of the fourth resistor R4 and the fifth resistor R5 and connected to the ground terminal through the first capacitor C1. The line between the fourth resistor R4 and the fifth resistor R5 is used as a voltage sampling point A and is connected to the voltage sampling port 53 corresponding to the voltage sampling pin 353 of the micro control unit 35 through the sixth resistor R6. The line between the sixth resistor R6 and the voltage sampling port 53 is also connected to the ground terminal through the second capacitor C2. In this embodiment, the voltage value of the sampling point A between the fourth resistor R4 and the fifth resistor R5 is collected through the voltage sampling pin 353 of the micro control unit 35, so that when the input current of the vehicle power supply 6 is too large, the micro control unit 35 can control the enable pin 351 to output the corresponding level signal through the internal logic control, so that the triode Q1 is turned off, and then the MOS tube Q2 is turned off, and the power supply line is disconnected, ensuring that the power supply module 5 can operate stably. In addition, the first capacitor C1 and the second capacitor C2 are used to filter out the clutter in the circuit to improve the stability of the circuit.

[0042] In another embodiment of the present invention, Figure 1-Figure 2 As shown, the radar controller 3 is provided with two communication chips 31, each communication chip 31 has two DSI3 communication ports 30, and each DSI3 communication port 30 is connected to the same number of radar probes 1. In this embodiment, two communication chips 31 are adopted, and each communication chip 31 has two DSI3 communication ports 30, and four groups of radar probes 1 with the same number are connected through four DSI3 communication ports 30, so as to further reduce the use of vehicle wiring harnesses and optimize the calculation complexity of the system, so as to complete the addressing of each radar probe 1 at low cost and conveniently. It should be noted that each DSI3 communication port 30 can be connected to a group of up to 7 radar probes 1. In specific implementation, the number of a group of radar probes 1 is set to 3, thereby meeting the use requirements of 12 radar probes 1 required by the current intelligent assisted driving system of motor vehicles.

[0043] In another embodiment of the present invention, Figure 2 As shown, the initial format is the SPI format. The microcontroller unit 35 of this embodiment is connected to the communication chip 31 using SPI (Serial Peripheral Interface) communication, which facilitates efficient and stable data communication between the microcontroller unit 35 and the communication chip 31. At the same time, the microcontroller unit 35 using SPI communication is also convenient for establishing SPI communication with other peripheral devices, which has wide applicability and is conducive to the design of the vehicle-mounted radar system.

[0044] On the other hand, combined Figure 4As shown, the embodiment of the utility model provides an automatic addressing method for a radar probe 1 of a vehicle-mounted radar system based on any of the above embodiments, comprising the following steps:

[0045] S1: Power on the system and control the radar controller 33 to initialize;

[0046] S2: Controlling each of the power supply modules 5 to be turned on in time in sequence through the radar controller 3;

[0047] S3: when each of the power supply modules 5 is turned on, each of the radar probes 1 connected to the turned-on power supply modules 5 is powered on and initialized, and a DSI3 communication connection is established with the radar controller 3 in the same batch;

[0048] S4: the radar controller 3 sends an address configuration instruction to the connected batch of radar probes 1 each time after establishing a DSI3 communication connection with a batch of radar probes 1, wherein the address configuration instruction includes an address writing command and a formal address code uniquely corresponding to the batch connected by the DSI3 communication; and

[0049] S5: Each of the radar probes 1 in the same batch that establishes a DSI3 communication connection with the radar controller 3 completes address writing according to the received address configuration instruction and feeds back a response signal to the radar controller 3 to complete addressing.

[0050] The present embodiment adopts the above method, by controlling the radar controller 3 to initialize when the system is powered on, ensuring that the radar controller 3 is in a normal working state, and then controlling each power supply module 5 to be turned on in turn in a time-sharing manner through the radar controller 3, so that each radar probe 1 connected to the power supply module 5 completes the power-on initialization, and each radar probe 1 that is powered on and initialized establishes a DSI3 communication connection with the radar controller 3 in the same batch, and then the radar controller 3 sends an address configuration signal to a corresponding batch of radar probes 1 connected through each DSI3 communication port 30, and waits for the corresponding batch of radar probes 1 to be turned on. After receiving the configuration signal, the radar probes 1 of the batch complete the addressing by feeding back a response signal to the radar controller 3; the radar controller 3 of this embodiment powers on the radar probes 1 of different batches by controlling the conduction state of the corresponding power supply module 5, thereby facilitating the radar controller 3 to send corresponding address configuration instructions to the radar probes 1 of different batches for addressing. The addressing process is relatively simple and efficient, and can reduce the number and length of wiring harnesses used, thereby reducing the wiring harness cost of the entire vehicle. Therefore, the vehicle-mounted radar system of the embodiment of the utility model can determine the address code of each radar probe 1 installed on the motor vehicle at a low cost and conveniently.

[0051] During specific implementation, the official address codes corresponding to the radar probes 1 that establish DSI3 communication connections with the radar controller 3 in different batches can be set to 1, 2, 3, etc. in sequence, ensuring that the radar probes 1 in the same group but belonging to different batches have non-conflicting address codes, providing a reliable basis for subsequent radar detection and data transmission.

[0052] In another embodiment of the utility model, each of the radar probes 1 is powered on and initialized specifically including: each of the radar probes 1 sets its own address code to a default temporary address code after being powered on. In this embodiment, each of the radar probes 1 sets its own address code to a default temporary address code after each of the radar probes 1 connected to the power supply module 5 that has been turned on is powered on, so that the radar controller 3 can establish a DSI3 communication connection with each of the radar probes 1 through each DSI3 communication port 30, thereby ensuring the smooth operation of the radar system.

[0053] In another embodiment of the utility model, each of the radar probes 1 of the same batch that establishes a DSI3 communication connection with the radar controller 3 completes the address writing according to the received address configuration information, specifically including: responding to the address writing command, and modifying the temporary address code to the formal address code. In this embodiment, the radar probes 1 of the same batch will modify their respective temporary address codes to the same formal address code according to the address writing command, effectively realizing the addressing of radar probes 1 of different batches. In specific implementation, the setting of the temporary address code needs to be different from the formal address code that uniquely corresponds to the batch connected to the DSI3 communication, and the two are non-conflicting address codes, ensuring the smooth operation of the radar probe 1 addressing.

[0054] In another embodiment of the utility model, after all the radar probes 1 have completed addressing, the radar controller 3 controls the power supply module 5 to be turned on at the same time, and reads the address code information of each radar probe 1 and compares it with the pre-stored address code information of each radar probe 1 to confirm whether each radar probe 1 is correctly addressed. In this embodiment, after all the radar probes 1 have completed addressing, the radar controller 3 is also used to confirm whether each radar probe 1 is correctly addressed, thereby improving the accuracy and stability of the system.

[0055] In another embodiment of the utility model, the initialization of the radar controller 3 specifically includes: initializing the peripherals of the radar controller 3, and configuring the information pre-stored in the storage unit 33 of the radar controller 3. In the process of initializing the radar controller 3 in this embodiment, the peripherals of the radar controller 3 are initialized, and the information pre-stored in the storage unit 33 of the radar controller 3 is configured, which can provide a reliable hardware foundation for the subsequent addressing process of the radar probe 1 and effectively ensure the stable operation of the system.

[0056] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the enlightenment of the present invention, ordinary technicians in this field can also make many variations without departing from the scope of protection of the purpose of the present invention and the claims, which all fall within the scope of protection of the present invention.

Claims

1. A vehicle-mounted radar system, comprising: A plurality of radar probes respectively assembled at predetermined positions on the motor vehicle, wherein the radar probes have a DSI3 communication interface; A radar controller, used for connecting and controlling each of the radar probes, the radar controller comprising a communication chip having at least two DSI3 communication ports, the communication chip establishing a DSI3 communication connection with each of the radar probes through the DSI3 communication ports; as well as A power supply module, connected to the vehicle power supply, the radar controller and the radar probe, respectively, for supplying power to each of the radar probes using the vehicle power supply under the control of the radar controller; It is characterized in that the multiple radar probes are evenly divided into several groups and the number of groups is the same as the total number of DSI3 communication ports in the radar controller, the DSI3 communication interfaces of the radar probes in the same group are all connected to the same DSI3 communication port and the DSI3 communication interfaces of the radar probes in different groups are connected to different DSI3 communication ports; the number of the power supply modules is the same as the number of radar probes included in a group of the radar probes, the power interface of each of the radar probes is connected to one of the power supply modules, and each of the radar probes in a batch connected to the same power supply module belongs to different groups.

2. The vehicle-mounted radar system according to claim 1, characterized in that: The radar controller further includes: A storage unit, used to pre-store a configuration code of a motor vehicle, wherein the configuration code at least includes information about the vehicle model, the number of radar probes, and address code information of each radar probe; and The micro control unit is connected to the communication chip, the storage unit and the power supply module respectively, and is used to generate a control signal in an initial format, receive and process a feedback signal uploaded by the communication chip, and control the on / off state of the power supply module.

3. The vehicle-mounted radar system according to claim 2, characterized in that: The power supply module includes a transistor Q1 and a MOS transistor Q2, wherein: The input end of the transistor Q1 is connected to the control end of the MOS transistor Q2 through the first resistor R1, the output end of the transistor Q1 is connected to the ground end, and the control end of the transistor Q1 is connected to the enable pin of the micro control unit; The input end of the MOS tube Q2 is connected to the vehicle power supply on the one hand, and is connected to the control end of the MOS tube Q2 through the second resistor R2 on the other hand. The output end of the MOS tube Q2 is connected to the power supply port for powering the radar probe through the sliding resistor R3.

4. The vehicle-mounted radar system according to claim 3, characterized in that: The line between the sliding resistor R3 and the power supply port is also connected to the ground terminal through the series body of the fourth resistor R4 and the fifth resistor R5 and is connected to the ground terminal through the first capacitor C1. The line between the fourth resistor R4 and the fifth resistor R5 serves as a voltage sampling point and is connected to the voltage sampling port corresponding to the voltage sampling pin of the micro control unit through the sixth resistor R6. The line between the sixth resistor R6 and the voltage sampling port is also connected to the ground terminal through the second capacitor C2.

5. The vehicle-mounted radar system according to claim 1, characterized in that: The radar controller is provided with two communication chips, each communication chip has two DSI3 communication ports, and each DSI3 communication port is connected to the same number of radar probes.

6. The vehicle-mounted radar system as claimed in claim 2, characterized in that: The initial format is the SPI format.

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