CN210604972U - Vehicle-mounted radar and system based on vehicle-mounted Ethernet - Google Patents
Vehicle-mounted radar and system based on vehicle-mounted Ethernet Download PDFInfo
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Abstract
The utility model provides a vehicle radar and system based on-vehicle ethernet, vehicle radar includes: the device comprises a transmitter, a receiver, a radio frequency transceiving chip and a vehicle-mounted Ethernet module, wherein the radio frequency transceiving chip is electrically connected with a transmitting antenna, a receiving antenna and the vehicle-mounted Ethernet module respectively. The radio frequency transceiver chip comprises a signal source, a mixer, an amplifying and filtering circuit and an A/D analog-to-digital conversion module. The utility model provides a radar system only need provide radio frequency receiving and dispatching and AD conversion function, then directly passes to well accuse through on-vehicle ethernet to data, has reduced a plurality of MCU processing modules, reduces consumption and cost. In addition, the complexity of the radar system is reduced, all the back-end data processing is put to the vehicle-mounted host end for processing, and the front end only retains one AD conversion chip, so that the reliability of the radar system can be effectively improved.
Description
Technical Field
The utility model relates to an on-vehicle equipment especially relates to be applied to on-vehicle radar and system of car.
Background
With the popularity of automobiles, more and more automobiles enter thousands of households, but safety issues regarding automobiles are brought about as a result. Information released by the national statistical bureau shows that 165246 traffic accidents happen in 2016 of China, and great personal and property injuries are brought to people. According to the reports of the national authoritative television stations, more or less countries in the world are threatened by the traffic safety problem, so that the solution of the traffic problem becomes a consensus all over the world. Statistical data show that the main reasons for major traffic accidents are behaviors such as overspeed and fatigue driving of drivers, and most accidents are rear-end accidents. In the past, efforts for improving vehicle safety and road safety are mainly made in order to reduce harm to people caused by traffic accidents, but less efforts are considered in the aspects of assisting drivers to drive and even replacing drivers to drive. According to the related research, if the driver can prepare for the first 0.5 seconds of the accident, more than half of the accident will not occur; if it can be known 1 second in advance, only 10% of accidents will occur; the accident rate of the vehicle provided with the anti-collision early warning system is only 27 percent of that of the common vehicle. Therefore, it is necessary to add some active safety precautions to the vehicle to assist the driver in detecting and judging the road. Taking an acc (adaptive Cruise control) active Cruise system as an example, the system mainly comprises a radar sensor, a wheel speed sensor, a brake controller and other components, the distance between the vehicle and surrounding vehicles or obstacles can be conveniently judged through the radar sensor, then a plurality of independent computing circuits in the system are utilized, the angle of the obstacle relative to the vehicle can be rapidly calculated through the vehicle speed and the distance between the vehicle and the obstacle, and further the position information of the obstacle can be obtained, once the distance exceeds the safe driving range, the system can carry out speed control through the wheel speed sensor and the brake controller, and further accidents are avoided. However, the existing anti-collision radar systems are expensive and are only mounted on high-end automobiles. In the field of civil vehicle-mounted anti-collision radars, millimeter wave radars with the frequency of 24GHz or 77GHz are mainly used as target detection sensors. The frequency modulation mode is generally a frequency modulation continuous waveform FMCW or a frequency shift keying waveform MFSK. The single radar is generally an independent system, and comprises a radio frequency front-end receiving and transmitting antenna, a processor, a back-end algorithm data processing and the like. In order to meet the requirement of comprehensively monitoring the direction of 360 degrees around the vehicle body, the whole vehicle generally needs 1 forward long-distance radar plus 4 or more medium-distance radars.
At present, commercial radars are all a vehicle and are provided with a plurality of radar systems, each radar system independently collects information of respective areas, then transmits the analyzed information to an automobile vehicle-mounted host platform, and then the automobile vehicle-mounted host platform collects and analyzes all the information, judges the position of a target obstacle and takes corresponding warning prompt or driving action, so that the following defects mainly exist:
1) the power consumption is large, and a plurality of radars of the vehicle body need to consume the electric energy provided by the storage battery;
2) the cost is high, a plurality of radars of the vehicle body are each an independent system, and a large space for wasting processor resources is provided;
3) the reliability is poor, the radar system comprises an MCU processing module, and then the processed data is transmitted to the vehicle-mounted host, so that the complexity of the system brings more reliability problems;
4) the control and responsibility division of the vehicle-mounted host computer on the original data are not facilitated. Data obtained by the vehicle-mounted host computer are processed by various algorithms of each radar module, and first-hand information detected by the sensor is difficult to master, so that difficulty is increased for responsibility division caused by data errors.
Disclosure of Invention
Based on the defect that exists among the prior art, the to-be-solved technical problem of the utility model lies in providing a low cost, safety, on-vehicle radar and system of on-vehicle ethernet.
In order to achieve the above object, the utility model discloses a technical scheme for providing a radar based on-vehicle ethernet, the radar includes: the system comprises a transmitter, a receiver, a radio frequency transceiving chip and a vehicle-mounted Ethernet module, wherein the radio frequency transceiving chip is electrically connected with a transmitting antenna, a receiving antenna and the vehicle-mounted Ethernet module respectively;
the transmitter at least comprises a transmitting antenna, the receiver at least comprises a receiving antenna, and the number of the receiving antennas is at least more than two;
the vehicle-mounted Ethernet module at least comprises a medium access control layer and a 100base-Tx physical layer, wherein the MAC layer packages signals transmitted from the radio frequency transceiver chip and then transmits the signals to the 100base-Tx physical layer;
the physical layer of the 100base-Tx adopts standard protocols of IEEE802.3 bp and IEEE802.3 bw;
the physical layer of 100base-T converts the received data according to the format conforming to the vehicle-mounted Ethernet protocol and then transmits the data through the vehicle-mounted Ethernet bus through the interface of 100 base-Tx.
The radar based on the vehicle-mounted Ethernet is characterized in that the radio frequency transceiving chip comprises a signal source, a mixer, an amplifying and filtering circuit and an A/D analog-to-digital conversion module, wherein,
a signal source: the device for generating the transmission signal adopts a voltage-controlled oscillator, wherein one part of the signal generated by the signal source is transmitted through an antenna, and the other part of the signal directly enters a mixer;
a mixer: mixing a transmitting signal received by a receiving antenna from an obstacle with a signal from a signal source, and outputting an intermediate frequency signal with lower frequency;
an amplification filter circuit: amplifying the intermediate frequency signal received from the mixer through an amplifying circuit, and then transmitting the signal after filtering an interference signal through a filter circuit;
the A/D module conversion module: and converting the received analog signal from the amplifying and filtering circuit into a digital signal and then transmitting the digital signal.
A radar based on a vehicle-mounted Ethernet, further, the intermediate frequency signal at least comprises relative distance and relative speed information between an obstacle and a radar antenna.
A radar based on vehicle-mounted Ethernet, further, the said at least includes one in short distance millimeter-wave radar, long distance millimeter-wave radar, laser radar;
the short-range millimeter wave radar comprises a 24GHz millimeter wave radar;
the long-range millimeter wave radar includes 60GHz and 77GHz millimeter wave radars;
the lidar includes at least one of a mechanical lidar or a solid-state lidar.
A radar based on a vehicle-mounted Ethernet is characterized in that a short-distance millimeter wave radar, a long-distance millimeter wave radar and a laser radar are arranged at preset positions of a vehicle, wherein at least 1 short-distance radar is arranged on the left side and the right side of a vehicle head, and at least 1 long-distance radar or laser radar is arranged in the middle of the vehicle head;
the left side and the right side of the middle part of the vehicle body are respectively provided with at least 1 short-distance radar; at least one of 1 short-distance radar, long-distance radar and laser radar is arranged in the middle of the tail of the vehicle body; at least 1 short-distance radar is respectively arranged at the left side and the right side of the tail of the vehicle.
An in-vehicle ethernet based radar, further wherein each of said plurality of receivers comprises a receiving antenna arranged to receive a reflected radar signal, and wherein said receiver comprises therein a matched filter corresponding to the receiving antenna arranged to identify an expected received signal from said reflected radar signal.
The utility model also provides a radar system based on-vehicle ethernet, including foretell radar, the on-vehicle host computer based on-vehicle ethernet, wherein, the radar passes through on-vehicle ethernet bus and is connected with the on-vehicle host computer electricity.
A radar system based on a vehicle-mounted Ethernet is further provided, wherein the vehicle-mounted host comprises at least a vehicle-mounted Ethernet module, a processor and a CAN chip, and the processor is respectively and electrically connected with the vehicle-mounted Ethernet interface module and the CAN chip;
the vehicle-mounted Ethernet module at least comprises a 100base-Tx physical layer and a medium access control layer, wherein the 100base-Tx physical layer is connected with a vehicle-mounted Ethernet bus and is used for receiving signals from a radar through the vehicle-mounted Ethernet bus;
the physical layer of the 100base-Tx adopts standard protocols of IEEE802.3 bp and IEEE802.3 bw;
the 100base-Tx analyzes the received signal and transmits the signal to the medium access control layer, and the signal is analyzed at the medium access control layer and then transmitted to the processor.
The radar system based on the vehicle-mounted Ethernet further comprises an FPGA (field programmable gate array) programmable logic processor and an ARM (advanced RISC machine) processor, wherein the FPGA programmable logic processor is electrically connected with the ARM processor, and the FPGA programmable logic processor and the ARM processor are respectively provided with crystal oscillators, wherein one crystal oscillator is used for the FPGA programmable logic processor, and the other crystal oscillator is used for the ARM processor;
the discrete Fourier transform digital signals of high-speed parallel operation are delivered to the FPGA, and the target data resolving and management, logic and multi-application data coordination communication is delivered to the ARM. The radar system based on the vehicle-mounted Ethernet further comprises a display screen, wherein the display screen is used for displaying the result of the radar or the picture of vehicle-mounted multimedia.
The utility model discloses beneficial technological effect:
1. the power consumption is reduced. The new radar system requires that each radar sensor only needs to provide radio frequency transceiving and A/D conversion functions, and then data are directly transmitted to the vehicle-mounted host, so that a plurality of MCU processing modules are reduced, and the power consumption is reduced.
2. The cost is reduced. The resources of a plurality of MCU hardware modules are reduced, and considerable BOM cost can be saved.
3. The reliability is improved. The complexity of the radar system is reduced, all the rear-end data are processed and placed at the end of the vehicle-mounted host, and the front end only retains one AD conversion chip, so that the reliability of the radar system can be effectively improved.
4. After the radar system is simplified, the vehicle-mounted host can obtain original data, and division of related responsibilities is facilitated.
Drawings
The following drawings are only schematic illustrations and explanations of the present invention, and do not limit the scope of the present invention.
FIG. 1 is a schematic diagram of an embodiment of a vehicle-mounted Ethernet-based radar system;
FIG. 2 is a schematic diagram of the distribution of long-range radar and short-range radar in an automobile;
FIG. 3 is a schematic diagram of a radar structure in the embodiment;
FIG. 4 is a schematic structural diagram of an embodiment of the on-board host;
FIG. 5 is a schematic structural diagram of an embodiment of the on-board host;
Detailed Description
In order to clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will be described with reference to the accompanying drawings, in which like reference numerals refer to like parts in the drawings. For the sake of simplicity, the drawings only schematically show the parts relevant to the present invention, and do not represent the actual structure as a product. In addition, in order to make the drawings concise and understandable, components having the same structure or function in some of the drawings are only schematically illustrated or only labeled.
As for the control system, it is well known to those skilled in the art that it may take any suitable form, either hardware or software, or a plurality of functional modules arranged discretely, or a plurality of functional units integrated into one piece of hardware. In its simplest form, the control system may be a controller, such as a combinational logic controller, a micro-programmed controller, or the like, so long as the operations described herein are enabled. Of course, the control system may also be integrated as a different module into one physical device without departing from the basic principle and scope of the present invention. Preferably, the control system is a running computer of the vehicle, so that the configuration of the vehicle can be utilized to the maximum extent, and the cost is greatly saved.
Example 1:
the embodiment provides a radar system based on a vehicle-mounted Ethernet, which is shown in figures 1 to 2 and comprises a plurality of radars and a vehicle-mounted host, wherein the radars are electrically connected with the vehicle-mounted host through a vehicle-mounted Ethernet bus. The radar includes at least a short-range radar, a long-range radar, or a lidar.
The vehicle-mounted radar distribution mode in the automobile divides the automobile into a head part, a middle part of the automobile body and a tail part, a long-distance radar can be arranged in the middle of the automobile head, two short-distance radars are arranged on the left side and the right side of the automobile head, the long-distance radars are used for detecting front obstacles of the automobile, and the two short-distance radars are used for detecting the left obstacles and the right obstacles of the automobile. Two set up 1 ~ 2 short distance radars respectively about automobile body middle part for survey the barrier of automobile body both sides, owing to only need survey the barrier of lane both sides, therefore the short distance radar is enough. In the middle position of automobile body afterbody, can set up short distance radar, wherein short distance radar is used for the monitoring of backing a car, and long distance radar is used for monitoring the barrier behind the car. Short-distance radars are respectively arranged at the left side and the right side of the tail of the vehicle and used for monitoring obstacles at the left side and the right side of the tail of the vehicle.
Or:
in the implementation, the radars can be arranged in such a way that a short-distance millimeter wave radar, a long-distance millimeter wave radar and a laser radar are arranged at preset positions of the vehicle, wherein at least 1 short-distance radar is arranged on the left side and the right side of the vehicle head, and at least 1 long-distance radar or laser radar is arranged in the middle position of the vehicle head;
the left side and the right side of the middle part of the vehicle body are respectively provided with at least 1 short-distance radar;
at least one of 1 short-distance radar, long-distance radar and laser radar is arranged in the middle of the tail of the vehicle body;
at least 1 short-distance radar is respectively arranged at the left side and the right side of the tail of the vehicle.
In the embodiment, the 24GHz vehicle-mounted radar is mainly used for short-range automobile radars and has the characteristics of low cost, wide wave beam and wide coverage range; the radar is mainly used for remote automobile radars at 60GHz and 77GHz, and has the characteristics of long detection distance and good directivity. Therefore, in this embodiment, the short-range laser radar is a 24GHz millimeter wave radar, and the long-range laser radar is a 60GHz or 77GHz millimeter wave radar.
In the implementation, the millimeter wave automobile anti-collision radar adopting a linear Frequency Modulation Continuous Wave (FMCW) modulation mode can realize speed measurement, distance measurement and angle measurement simultaneously by the linear frequency modulation continuous wave, has a mature signal processing theory and a plurality of signal processing algorithms, and is the mainstream modulation mode of the existing automobile anti-collision radar.
In this embodiment, millimeter wave radar can replace laser radar, and when adopting laser radar, locomotive portion intermediate position sets up at least one laser radar, and locomotive afterbody intermediate position sets up at least one laser radar. The laser radar comprises one of a mechanical laser radar and a solid-state laser radar, wherein the mechanical laser radar comprises a photodiode, an MEMS (micro-electromechanical systems) reflector, a laser emitting and receiving device and the like, and a mechanical rotating part is an MEMS reflector capable of controlling a laser emitting angle in a figure by 360 degrees. Solid-state lidar, which uses Optical Phased Array (Optical Phased Array), Photonic integrated circuit (Photonic IC) and electronic components such as Far Field Radiation Pattern (Far Field Radiation Pattern) to replace mechanical rotation components to realize the adjustment of the emitted laser angle.
Example 2:
this implementation provides a vehicle ethernet radar, see 3, wherein, vehicle ethernet radar includes: the device comprises a transmitter, a receiver, a radio frequency transceiving chip and a vehicle-mounted Ethernet module, wherein the radio frequency transceiving chip is electrically connected with a transmitting antenna, a receiving antenna and the vehicle-mounted Ethernet module respectively.
The transmitter at least comprises a transmitting antenna, and the receiver at least comprises a receiving antenna;
receiving antenna quantity can be a plurality of, because the signal that the radar was sent out after the barrier transmission has the loss, consequently adopts a plurality of receiving antenna can improve radar angle finding accuracy.
Each of a plurality of receivers includes a receive antenna arranged to receive a reflected radar signal, and wherein each of the plurality of receivers includes a matched filter arranged to identify an expected receive signal from the reflected radar signal.
The radio frequency transceiver chip is a core part of the radar and at least comprises: a signal source, a mixer, an amplifying and filtering circuit, an A/D analog-to-digital conversion module,
a signal source: the device for generating the transmitting signal adopts a Voltage Controlled Oscillator (VCO), and the frequency of an output signal of the VCO is modulated by an input Voltage to generate the transmitting signal. One part of the signal generated by the signal source is transmitted through the antenna, and the other part of the signal directly enters the mixer.
A mixer: mixing a transmitting signal received by a receiving antenna from an obstacle with a signal from a signal source, and outputting an intermediate frequency signal with lower frequency, wherein the intermediate frequency signal at least comprises relative distance and relative speed information between the obstacle and a radar antenna;
an amplification filter circuit: the intermediate frequency signal received from the mixer is amplified by the amplifying circuit, and then the signal is transmitted after the interference signal is filtered by the filtering circuit.
The A/D module conversion module: and converting the received analog signal from the amplifying and filtering circuit into a digital signal and then transmitting the digital signal.
The vehicle-mounted Ethernet module at least comprises a medium access control (MAC layer) and a physical layer (PHY) of 100base-Tx, wherein the MAC layer puts signals which are amplified and filtered in a radio frequency transceiver chip in radar and are transmitted on a network into frames, and then transfers the frames to the physical layer of 100base-Tx, and if a certain frame is damaged in transmission, the damaged frame only needs to be retransmitted without retransmitting the whole transmission content. And the physical layer of 100base-Tx encapsulates the received data according to a format conforming to the vehicle-mounted Ethernet protocol, and transmits the encapsulated data to the vehicle-mounted host computer through the vehicle-mounted Ethernet bus through the 100base-Tx interface.
The physical layer of 100base-Tx adopts standard protocols of IEEE802.3 bp and IEEE802.3 bw.
Example 3:
this implementation provides a vehicle-mounted host computer for handle the signal of radar, vehicle-mounted host computer includes at least: the vehicle-mounted Ethernet display device comprises a vehicle-mounted Ethernet module, a processor, a display screen and a CAN chip, wherein the processor is respectively and electrically connected with the vehicle-mounted Ethernet interface module, the display screen and the CAN chip.
Specifically, referring to fig. 4, the on-board host employs a single processor to process signals transmitted from the radar. In order to improve efficiency, a plurality of processors may be used.
Specifically, referring to fig. 5, the processor does not adopt a single device, and comprises an FPGA programmable logic processor and an ARM processor which are electrically connected, wherein the crystal oscillator 1 is used for synchronizing the time of the FGPA programmable logic processor, and the crystal oscillator 2 is used for synchronizing the time of the ARM processor.
Specifically, the vehicle-mounted Ethernet module comprises a 100base-Tx physical layer and a medium access control layer, wherein the 100base-Tx physical layer is connected with a vehicle-mounted Ethernet bus and used for receiving signals from a radar through the vehicle-mounted Ethernet bus. The 100base-Tx parses the received signal and transmits the parsed signal to a Medium Access Control (MAC) layer, and parses the signal at the MAC layer and transmits the parsed signal to a processor.
Because a plurality of radars are arranged on the automobile, the radars collect a large amount of data at every moment, and the vehicle-mounted host computer can make a corresponding control instruction to the automobile only by acquiring the final result of the radars. The vehicle-mounted host needs real-time data, which brings a large load to the calculation, and the digital signal processing system needs not only a large amount of data calculation but also complex logic processing. In order to solve the problem, specifically, the processor in this embodiment adopts an FPGA programmable logic processor and an ARM processor, and because real-time performance of data is required, two crystal oscillators are used for time synchronization, where the crystal oscillator 1 is used for the FPGA programmable logic processor, the crystal oscillator 2 is used for the ARM processor, and on-chip combination of the FPGA processor and the ARM processor simultaneously meets the strict requirements of two processing processes on hardware resources. The digital signal of discrete Fourier transform (FFT) which needs high-speed parallel operation is transmitted to FPGA, and the communication of target data resolving, management, logic and multi-application data coordination is transmitted to ARM, and the two are complementary.
And when the FPGA processor and the ARM settle the digital signals and then acquire the size and the distance of the barrier, the corresponding control instructions are transmitted to the corresponding ECU through the CAN bus by the CAN chip for control.
The display screen is used for displaying the result of the radar or the picture of the vehicle-mounted multimedia or the camera.
Claims (10)
1. An in-vehicle ethernet-based radar for vehicles, comprising: the system comprises a transmitter, a receiver, a radio frequency transceiving chip and a vehicle-mounted Ethernet module, wherein the radio frequency transceiving chip is electrically connected with a transmitting antenna, a receiving antenna and the vehicle-mounted Ethernet module respectively;
the transmitter at least comprises a transmitting antenna, the receiver at least comprises a receiving antenna, and the number of the receiving antennas is at least more than two;
the vehicle-mounted Ethernet module at least comprises a medium access control layer and a 100base-Tx physical layer, wherein the MAC layer packages signals transmitted from the radio frequency transceiver chip and then transmits the signals to the 100base-Tx physical layer;
the physical layer of the 100base-Tx adopts standard protocols of IEEE802.3 bp and IEEE802.3 bw;
the physical layer of 100base-T converts the received data according to the format conforming to the vehicle-mounted Ethernet protocol and then transmits the data through the vehicle-mounted Ethernet bus through the interface of 100 base-Tx.
2. The vehicle-mounted Ethernet-based vehicle radar of claim 1, wherein the radio frequency transceiver chip comprises a signal source, a mixer, an amplifying and filtering circuit, and an A/D analog-to-digital conversion module, wherein,
a signal source: the device for generating the transmission signal adopts a voltage-controlled oscillator, wherein one part of the signal generated by the signal source is transmitted through an antenna, and the other part of the signal directly enters a mixer;
a mixer: mixing a transmitting signal received by a receiving antenna from an obstacle with a signal from a signal source, and outputting an intermediate frequency signal with lower frequency;
an amplification filter circuit: amplifying the intermediate frequency signal received from the mixer through an amplifying circuit, and then transmitting the signal after filtering an interference signal through a filter circuit;
the A/D module conversion module: and converting the received analog signal from the amplifying and filtering circuit into a digital signal and then transmitting the digital signal.
3. A vehicle ethernet based vehicle radar according to claim 2 wherein the intermediate frequency signal comprises at least relative distance and relative velocity information between the obstacle and the radar antenna.
4. The vehicle-mounted Ethernet-based vehicle radar of claim 1, wherein the radar comprises at least one of a short-range millimeter wave radar, a long-range millimeter wave radar, and a laser radar;
the short-range millimeter wave radar comprises a 24GHz millimeter wave radar;
the long-distance millimeter wave radar comprises 60GHz and 77GHz millimeter wave radars;
the lidar includes at least one of a mechanical lidar or a solid-state lidar.
5. The vehicle-mounted Ethernet-based vehicle-mounted radar of claim 4, wherein the short-distance millimeter wave radar, the long-distance millimeter wave radar and the laser radar are arranged at preset positions of a vehicle, at least 1 short-distance radar is arranged on the left side and the right side of a vehicle head, and at least 1 long-distance radar or laser radar is arranged in the middle position of the vehicle head;
the left side and the right side of the middle part of the vehicle body are respectively provided with at least 1 short-distance radar;
at least one of 1 short-distance radar, long-distance radar and laser radar is arranged in the middle of the tail of the vehicle body;
at least 1 short-distance radar is respectively arranged at the left side and the right side of the tail of the vehicle.
6. A vehicle ethernet based vehicle radar in accordance with claim 1, wherein said receiving antenna is arranged to receive a reflected radar signal, and wherein said receiver comprises a matched filter corresponding to the receiving antenna, said matched filter being arranged to identify an expected received signal from said reflected radar signal.
7. A vehicle-mounted Ethernet-based vehicle-mounted radar system is characterized by comprising the vehicle-mounted Ethernet-based vehicle-mounted radar and the vehicle-mounted host computer, wherein the vehicle-mounted radar is electrically connected with the vehicle-mounted host computer through a vehicle-mounted Ethernet bus.
8. The vehicle-mounted Ethernet-based vehicle-mounted radar system as claimed in claim 7, wherein the vehicle-mounted host comprises at least a vehicle-mounted Ethernet module, a processor and a CAN chip, and the processor is electrically connected with the vehicle-mounted Ethernet interface module and the CAN chip respectively;
the vehicle-mounted Ethernet module at least comprises a 100base-Tx physical layer and a medium access control layer, wherein the 100base-Tx physical layer is connected with a vehicle-mounted Ethernet bus and is used for receiving signals from a radar through the vehicle-mounted Ethernet bus;
the physical layer of the 100base-Tx adopts standard protocols of IEEE802.3 bp and IEEE802.3 bw;
the 100base-Tx analyzes the received signal and transmits the signal to the medium access control layer, and the signal is analyzed at the medium access control layer and then transmitted to the processor.
9. The vehicle-mounted Ethernet-based vehicle radar system as recited in claim 8, wherein the processor comprises an FPGA programmable logic processor and an ARM processor, the FPGA programmable logic processor is electrically connected with the ARM processor, the FPGA programmable logic processor and the ARM processor are respectively provided with crystal oscillators, one crystal oscillator is used for the FPGA programmable logic processor, and the other crystal oscillator is used for the ARM processor;
the discrete Fourier transform digital signals of high-speed parallel operation are delivered to the FPGA, and the target data resolving and managing, logic and multi-application data coordination communication is delivered to the ARM.
10. The vehicle-mounted Ethernet-based vehicle-mounted radar system as claimed in claim 7, wherein the vehicle-mounted host further comprises a display screen for displaying the result of radar or the picture of the vehicle-mounted multimedia.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112804306A (en) * | 2020-12-31 | 2021-05-14 | 的卢技术有限公司 | Vehicle-mounted Ethernet-based automobile radar communication device, method and system |
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| CN112804306A (en) * | 2020-12-31 | 2021-05-14 | 的卢技术有限公司 | Vehicle-mounted Ethernet-based automobile radar communication device, method and system |
| CN112804306B (en) * | 2020-12-31 | 2024-06-21 | 的卢技术有限公司 | Vehicle radar communication device, method and system based on vehicle Ethernet |
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