Vehicle-mounted ultrasonic radar system and vehicle
By connecting the ultrasonic radar in a daisy-chain configuration, the system achieves flexibility and high performance requirements for the vehicle-mounted ultrasonic radar system. This solves the problem of incompatible power management chip configurations in existing technologies, reduces wiring harness costs and lengths, and improves vehicle reliability.
Patent Information
- Application Number
- CN202423031720.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-10
- Publication Date
- 2025-11-18
- Estimated Expiration
- 2034-12-10
AI Technical Summary
Existing vehicle-mounted ultrasonic radar systems are difficult to adapt to the different power management chip configurations of different vehicle models, and the wiring harnesses are expensive and incompatible with existing controller module hardware solutions.
The ultrasonic radar is connected in a daisy-chain mode. The radar addressing and identification coding are realized through the main control unit and DSI3 main transceiver. It does not rely on the power management chip, is compatible with the power module configuration of different vehicle models, and reduces the wiring harness length and cost.
It achieves the flexibility and high performance requirements of ultrasonic radar, reduces the length and cost of the vehicle wiring harness, and improves the reliability and ease of maintenance of the vehicle.
Smart Images
Figure CN223565890U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a kind of vehicle-mounted ultrasonic radar system and vehicle, belong to the technical field of automotive electronics. BACKGROUND
[0002] In automatic driving technology, as a kind of short-range environment perception sensor, ultrasonic radar is widely used in automatic parking and other scenes. Since multiple ultrasonic radars are installed on the vehicle, and these ultrasonic radars need to work simultaneously and transmit data, each ultrasonic radar will be assigned a unique ID, i.e., an identity code, in the system for identifying signals from different radars. The prior art generates multiple power supplies by controlling multiple power management chips to assist in radar addressing, positioning and ID setting. This ultrasonic radar system is difficult to adapt to changes in power management chip configuration for different vehicle models. In addition, in the prior art, the wire harness connecting each ultrasonic radar is directly connected to the controller module, and the cost of the wire harness of the whole vehicle is high. SUMMARY
[0003] To overcome the shortcomings of the prior art, the utility model provides a vehicle-mounted ultrasonic radar system that does not rely on the number of power management chips to assist in radar addressing, positioning and ID setting, can adapt to different power module configurations for different vehicle models, is compatible with the hardware scheme of the existing vehicle controller module, can ensure that each ultrasonic radar has sufficient data bandwidth to meet its high performance requirements, and can also significantly reduce the length and cost of the wire harness of the whole vehicle.
[0004] According to the first aspect of the utility model, a vehicle-mounted ultrasonic radar system is provided, which comprises a controller module, a radar module and a power module.
[0005] The power module is used to power the radar module.
[0006] The radar module comprises 12 ultrasonic radars with DSI3 interfaces.
[0007] The controller module comprises a master control unit and a DSI3 master transceiver, and the master control unit is connected to the DSI3 master transceiver.
[0008] The DSI3 master transceiver comprises 4 DSI3 bus interfaces, and each DSI3 bus interface is connected in series with 3 ultrasonic radars in a daisy chain mode.
[0009] The master control unit communicates with the ultrasonic radars through the DSI3 master transceiver.
[0010] According to one embodiment, the ultrasonic radars each comprise a power pin, a ground pin, a signal input pin and a signal output pin.
[0011] According to one embodiment, each of the DSI3 bus interfaces is connected in series with three of the ultrasonic radars in a daisy chain mode, and the connection is made according to the following rules: the power supply pins of the three ultrasonic radars are all connected to the vehicle power supply, the ground pins of the three ultrasonic radars are all grounded, the signal input pin of the DSI3 bus interface is connected to the signal output pin of one ultrasonic radar at the start of the daisy chain, and the signal output pin of an ultrasonic radar upstream in the daisy chain is connected to the signal input pin of an adjacent downstream ultrasonic radar.
[0012] According to one embodiment, the master control unit is connected to the DSI3 master transceiver through an SPI interface.
[0013] According to one embodiment, the DSI3 master transceiver includes two two-way DSI3 master transceiver chips.
[0014] According to one embodiment, the ultrasonic radar includes an AK2 ultrasonic sensor.
[0015] According to one embodiment, the master control unit is further configured to set the DSI3 bus mode of the DSI3 master transceiver and the identity code of the ultrasonic radar.
[0016] According to a second aspect of the present application, a vehicle is provided, which includes the vehicle-mounted ultrasonic radar system according to the first aspect of the present application.
[0017] The present application has at least the following advantages: the present application uses four DSI3 bus interfaces, each of which is connected in series with three ultrasonic radars in a daisy chain mode, and the addressing and identity coding of the ultrasonic radars are completed through addressing commands, thereby realizing the identification and control of the twelve ultrasonic radars of the entire vehicle without relying on the number of power management chips to assist in the addressing and positioning of the radars and the identity coding. The present application can adapt to different power module configurations of different vehicle models, is compatible with the hardware scheme of the existing vehicle model controller module, and at the same time ensures that each ultrasonic radar has sufficient data bandwidth to meet its high performance requirements, and greatly reduces the wire harness length and cost of the entire vehicle. BRIEF DESCRIPTION OF DRAWINGS
[0018] Figure 1 FIG. 1 is a structural schematic diagram of a vehicle-mounted ultrasonic radar system in the prior art.
[0019] Figure 2 FIG. 2 is a structural schematic diagram of a vehicle-mounted ultrasonic radar system according to an embodiment of the present application.
[0020] Figure 3 FIG. 3 is a structural schematic diagram of an ultrasonic radar according to an embodiment of the present application.
[0021] Figure 4This is a schematic diagram of the wiring harness in an existing vehicle-mounted ultrasonic radar system.
[0022] Figure 5 This is a wiring diagram of a vehicle-mounted ultrasonic radar system provided for an embodiment of the present invention. Detailed Implementation
[0023] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to specific embodiments.
[0024] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.
[0025] In all the examples shown and discussed herein, any specific values should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.
[0026] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in other figures.
[0027] Automated parking assistance systems are a crucial component of modern intelligent driving technology. In automated parking applications, typically 12 ultrasonic radars are deployed around the vehicle to detect and identify available parking spaces and obstacles. Existing technologies often employ a connection topology for onboard ultrasonic radar systems as follows: Figure 1 As shown, this solution is widely used in existing models from multiple manufacturers. The solution employs two dual-channel DSI3 transceiver chips to provide four DSI3 bus interfaces. Each DSI3 bus interface connects to three ultrasonic radars in parallel. The power module contains three power management chips to provide three independent power supplies, each powering one of the three ultrasonic radars connected to the same DSI3 bus interface. The unique identifier (ID) for each ultrasonic radar requires the assistance of the three power supplies to complete the ID setting. Specifically, during system power-on initialization, the controller module controls the power supply status of the three power supplies in the power module to ensure that only one ultrasonic radar on each DSI3 bus interface is powered on at a time during ID setting. After the IDs of 12 ultrasonic radars are set, the controller module will then simultaneously power on all three power supplies. In this solution, the radar ID setting depends on the power module configuration, and the number of ultrasonic radars connected to each DSI3 bus interface is determined by the number of power management chips in the power module.
[0028] In some new vehicle models, a power module only contains 2 power management chips, which leads to the fact that the traditional architecture described above cannot be applied to new vehicle models, and a new technical solution is urgently needed. If the technical concept of the foregoing scheme is followed, a double DSI3 main transceiver chip needs to be added to increase 2 DSI3 bus interfaces, and each DSI3 bus interface is connected in parallel with 2 ultrasonic radars. However, this scheme cannot be compatible with the original controller module, and will increase the BOM (Bill of Materials) cost and development cost of the controller module.
[0029] In addition, in the technical solution described above, as shown in Figure 4 Each ultrasonic radar is directly connected to the controller module through a wire harness, and the cost of the wire harness of the whole vehicle is high.
[0030] To solve the above technical problems, the utility model embodiment provides a kind of vehicle-mounted ultrasonic radar system, and the setting process of ultrasonic radar ID does not need to be addressed positioning by the aid of power management chip, can adapt to the power module configuration of different vehicle models, can be compatible with the hardware scheme of existing vehicle controller module, while still can greatly reduce the length and cost of the wire harness of whole vehicle.
[0031] Figure 2 It is the structure diagram of a kind of vehicle-mounted ultrasonic radar system provided by the utility model embodiment, as shown in Figure 2 A kind of vehicle-mounted ultrasonic radar system includes: controller module 1, radar module 2 and power module 3;Power module 3 is used to power radar module 2;Radar module 2 includes 12 ultrasonic radars (USS, Ultrasonic Sensor System) 21 with DSI3 interface;Controller module 1 includes main control unit 11 and DSI3 main transceiver 12, and main control unit 11 is connected with DSI3 main transceiver 12;DSI3 main transceiver 12 includes 4 DSI3 bus interfaces 121, and each DSI3 bus interface 121 is connected in series with 3 ultrasonic radars 21 in daisy chain mode;Main control unit 11 is communicated with ultrasonic radar 21 by DSI3 main transceiver 12.
[0032] In some examples, the controller module 1 can be implemented as an ADAS (Advanced Driving Assistance System) domain controller, which is used to receive perception data from different sensors (e.g. camera, ultrasonic radar, laser radar, etc.), and analyze and process the data to make driving decisions. The master unit 11 can be implemented as a Horizon 6E chip. The DSI3 master transceiver 12 can be implemented as a dual DSI3 master transceiver chip of model E521.42 including 2 Elmos. DSI3 (Distributed System Interface 3) communication is a master-slave one-to-many asynchronous single-wire current-voltage type communication. In the master-slave communication mode, the Master (master device) is responsible for initiating communication and controlling the communication process, and the Slave (slave device) responds according to the instructions of the Master. In DSI3 communication, the Master transmits data to the Slave in the form of voltage, and the Slave returns data in the form of current. The master unit 11 and the DSI3 master transceiver 12 are connected through an SPI (Serial Peripheral interface) interface. SPI is a high-speed, full-duplex, synchronous communication bus.
[0033] In some examples, the radar module 2 can be implemented as including 12 AK2 ultrasonic radars each including an AK2 ultrasonic sensor, as shown in Figure 3 The power supply pin is used to access the power supply, the signal input pin is used to receive the DSI3 signal sent by the controller module 1, the signal output pin is used to output the DSI3 signal sent by the controller module 1 to the next ultrasonic radar 21 in the daisy chain, and the ground pin is used for grounding. Each DSI3 bus interface 121 is connected in series with 3 ultrasonic radars 21 in daisy chain mode, and the specific connection is made according to the following rules: the power supply pins of the 3 ultrasonic radars 21 are connected to the vehicle power supply, the ground pins of the 3 ultrasonic radars are grounded, the DSI3 bus interface 121 is connected to the signal input pin of one ultrasonic radar 21 at the start of the daisy chain, and the signal output pin of the ultrasonic radar 21 upstream of the daisy chain is connected to the signal input pin of the adjacent downstream ultrasonic radar 21.
[0034] In some examples, the master control unit 11 is also configured to set the DSI3 bus mode of the DSI3 master transceiver 12 and the identity codes of the ultrasonic radars 21. Specifically, after the system is powered on, the master control unit 11 sets the DSI3 master transceiver 12 to a daisy chain bus mode, and then sends an addressing command through the DSI3 bus interface 121 to determine the specific position of each ultrasonic radar 21 on each daisy chain link and the identity code. The addressing command is transmitted in sequence from the first ultrasonic radar 21 on the link to the last ultrasonic radar 21 on the link. After receiving the command, each ultrasonic radar 21 monitors the current flowing through it according to its own sensing resistance, and determines whether it is the last radar on the link according to the current value. If not, the command is transmitted to the next radar until it reaches the last ultrasonic radar 21 on the link, thereby determining the position of the last radar on the link and assigning an identity code to the ultrasonic radar 21, and then disabling the response current of the radar. Subsequently, the master control unit 11 sends the addressing command again, and the command transmission process is consistent with the above steps, but this time, because the response current of the last radar on the link is disabled, the command stops when it reaches the second-to-last ultrasonic radar 21 on the link, thereby determining the position of the second-to-last ultrasonic radar 21 on the link and assigning an identity code to the ultrasonic radar 21, and then disabling the response current of the radar. Next, the master control unit 11 repeats the above steps, each time transmitting one less radar, until all the ultrasonic radars 21 on the link are assigned an identity code, and the addressing process is complete. The identity code of each ultrasonic radar 21 is unique and represents the relative position of the ultrasonic radar 21 on the link. The addressing process is simple and efficient, and does not require pre-setting temporary identity codes of the radars and the number of radars connected in series on each link. After the addressing process is complete, the master control unit 11 can control the ultrasonic radars 21 to detect obstacles and perform other work through interactive communication.
[0035] The vehicle-mounted ultrasonic radar system provided by the embodiments of the present application has at least the following advantages:
[0036] Compared with the prior art scheme shown in Figure 1 The vehicle-mounted ultrasonic radar system provided by the embodiments of the present application adopts the structure of four DSI3 bus interfaces used by most current vehicle models, ensuring compatibility with the original controller module hardware scheme. At the same time, the working mode of the DSI3 master transceiver is changed from a parallel bus mode to a daisy chain bus mode, and the three ultrasonic radars on each DSI3 bus interface are changed from a parallel connection mode to a series connection mode. Then, the automatic addressing of the ultrasonic radars is completed through the addressing command, and each ultrasonic radar is assigned a unique identity code. The number of power management chips is not required to assist in ultrasonic radar addressing and positioning and identity code assignment, and the system can flexibly adapt to the needs of different vehicle models and configurations.
[0037] The DSI3 main transceiver of the vehicle-mounted ultrasonic radar system provided in the embodiment of the utility model adopts the daisy chain bus mode, but still ensures that each ultrasonic radar can obtain sufficient data bandwidth 148kbit / s, and the number of echoes that can be received and effectively processed is not reduced, so the detection distance is not affected, and the high performance requirement of the ultrasonic radar in a complex environment can be fully met.
[0038] In addition, as Figure 4 And Figure 5 It can be seen from the comparison that, compared with the traditional ultrasonic radar system architecture, the vehicle-mounted ultrasonic radar system provided in the embodiment of the utility model realizes significant optimization in the length of the whole vehicle harness. Under the traditional architecture, the length of the whole vehicle harness can reach 126 meters, which not only increases the weight and cost of the vehicle, but also brings problems such as complex wiring, high failure rate and the like. In the vehicle-mounted ultrasonic radar system provided in the embodiment of the utility model, the ultrasonic radars on each DSI3 bus interface are connected in series, and the length of the whole vehicle harness is greatly reduced to 60 meters, which greatly reduces the cost of the harness of the whole vehicle, and also improves the reliability and maintenance convenience of the vehicle.
[0039] The embodiment of the utility model also provides a vehicle, which comprises the vehicle-mounted ultrasonic radar system provided in any one of the above embodiments of the utility model, and has the corresponding beneficial effects of the vehicle-mounted ultrasonic radar system provided in any one of the above embodiments of the utility model.
[0040] Each embodiment in the specification is described in a progressive manner, and the same and similar parts between each embodiment can be understood by mutual reference. Each embodiment mainly describes the differences from other embodiments, and each embodiment can be used independently or in combination.
[0041] It should be understood that the above only describes exemplary embodiments of the utility model, and the protection scope of the utility model is not limited thereto. Those skilled in the art can easily think of modifications, replacements or adaptive changes without departing from the principles and essence of the utility model, which should be covered in the protection scope of the utility model.
Claims
1. A vehicle-mounted ultrasonic wave radar system characterized by comprising: The vehicle comprises the vehicle-mounted ultrasonic radar system according to any one of claims 1-7. The vehicle comprises the vehicle-mounted ultrasonic radar system according to any one of claims 1-7. The vehicle comprises the vehicle-mounted ultrasonic radar system according to any one of claims 1-7. The vehicle comprises the vehicle-mounted ultrasonic radar system according to any one of claims 1-7. The vehicle comprises the vehicle-mounted ultrasonic radar system according to any one of claims 1-7. The vehicle comprises the vehicle-mounted ultrasonic radar system according to any one of claims 1-7. The vehicle comprises the vehicle-mounted ultrasonic radar system according to any one of claims 1-7.
2. The vehicle-mounted ultrasonic radar system of claim 1, wherein, The vehicle comprises the vehicle-mounted ultrasonic radar system according to any one of claims 1-7.
3. The vehicle-mounted ultrasonic radar system of claim 2, wherein, The vehicle comprises the vehicle-mounted ultrasonic radar system according to any one of claims 1-7.
4. The vehicle-mounted ultrasonic radar system of claim 1, wherein, The vehicle comprises the vehicle-mounted ultrasonic radar system according to any one of claims 1-7.
5. The vehicle-mounted ultrasonic radar system of claim 1, wherein, The vehicle comprises the vehicle-mounted ultrasonic radar system according to any one of claims 1-7.
6. The vehicle-mounted ultrasonic radar system of claim 1, wherein, The vehicle comprises the vehicle-mounted ultrasonic radar system according to any one of claims 1-7.
7. The vehicle-mounted ultrasonic radar system of claim 1, wherein, The vehicle comprises the vehicle-mounted ultrasonic radar system according to any one of claims 1-7.
8. A vehicle characterized by comprising: The vehicle comprises the vehicle-mounted ultrasonic radar system according to any one of claims 1-7. The vehicle comprises the vehicle-mounted ultrasonic radar system according to any one of claims 1-7. The vehicle comprises the vehicle-mounted ultrasonic radar system according to any one of claims 1-7. The vehicle comprises the vehicle-mounted ultrasonic radar system according to any one of claims 1-7. The vehicle comprises the vehicle-mounted ultrasonic radar system according to any one of claims 1-7. The vehicle comprises the vehicle-mounted ultrasonic radar system according to any one of claims 1-7. The vehicle comprises the vehicle-mounted ultrasonic radar system according to any one of claims 1-7. The vehicle comprises the vehicle-mounted ultrasonic radar system according to any one of claims 1-7. The vehicle comprises the vehicle-mounted ultrasonic radar system according to any one of claims 1-7. The vehicle comprises the vehicle-mounted ultrasonic radar system according to any one of claims 1-7. The vehicle comprises the vehicle-mounted ultrasonic radar system according to any one of claims 1-7. The vehicle comprises the vehicle-mounted ultrasonic radar system according to any one of claims 1-7. The vehicle comprises the vehicle-mounted ultrasonic radar system according to any one of claims 1-7. The vehicle comprises the vehicle-mounted ultrasonic radar system according to any one of claims 1-7. The vehicle comprises the vehicle-mounted ultrasonic radar system according to any one of claims 1-7. The vehicle comprises the vehicle-mounted ultrasonic radar system according to any one of claims 1-7. The vehicle comprises the vehicle-mounted ultrasonic radar system according to any one of claims 1-7. The vehicle comprises the vehicle-mounted ultrasonic radar system according to any one of claims 1-7. The vehicle comprises the vehicle-mounted ultrasonic radar system according to any one of claims 1-7. The vehicle comprises the vehicle-mounted ultrasonic radar system according to any one of claims 1-7. The vehicle comprises the vehicle-mounted ultrasonic radar system according to any one of claims 1-7. The vehicle comprises the vehicle-mounted ultrasonic radar system according to any one of claims 1-7. The vehicle comprises the vehicle-mounted ultrasonic radar system according to any one of claims 1-7. The vehicle comprises the vehicle-mounted ultrasonic radar system according to any one of claims 1-7. The vehicle comprises the vehicle-mounted ultrasonic radar system according to any one of claims 1-7. The vehicle comprises the vehicle-mounted ultrasonic radar system according to any one of claims 1-7. The vehicle comprises the vehicle-mounted ultrasonic radar system according to any one of claims 1-7. The vehicle comprises the vehicle-mounted ultrasonic radar system according to any one of claims 1-7. The vehicle comprises the vehicle-mounted ultrasonic radar system according to any one of claims 1-7. The vehicle comprises the vehicle-mounted ultrasonic radar system according to any one of claims 1-7. The vehicle comprises the vehicle-mounted ultrasonic radar system according to any one of claims 1-7. The vehicle comprises the vehicle-mounted ultrasonic radar system according to any one of claims 1-7. The vehicle comprises the vehicle