CN212301877U - Automobile millimeter wave radar early warning system - Google Patents
Automobile millimeter wave radar early warning system Download PDFInfo
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- CN212301877U CN212301877U CN202020152684.8U CN202020152684U CN212301877U CN 212301877 U CN212301877 U CN 212301877U CN 202020152684 U CN202020152684 U CN 202020152684U CN 212301877 U CN212301877 U CN 212301877U
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Abstract
The utility model provides an automobile millimeter wave radar early warning system, include: the device comprises an ultra-wide horizontal field angle antenna, a millimeter wave radar receiving and transmitting module, a control assembly communication module, a driving seat early warning module, a vehicle information collection module, a left reflector early warning module and a right reflector early warning module. The utility model can realize the monitoring functions of blind area monitoring, lane changing assistance, door opening early warning, rear traffic crossing early warning and rear collision early warning under the condition of single radar by only depending on one set of automobile radar transceiving system; the method has two modes of near field and far field, and has completely different functions of target detection, aggregation, tracking, alarming and the like on long-distance and short-distance targets in algorithm processing. The wide wave beam can be realized to radar receiving and dispatching antenna on the horizontal plane direction, effectively increases the radar detection area, has reduced car blind area monitoring radar system's complexity effectively, makes on-vehicle millimeter wave radar system installation more simple and convenient, and it is more convenient to use.
Description
Technical Field
The utility model relates to an automobile automation control technical field, concretely relates to car millimeter wave radar early warning system.
Background
With the progress of society, the demand of the automobile market is continuously increased, people have higher and higher requirements on the overall performance of the automobile, and the requirements on rapidness, convenience and intellectualization are pursued more and more. Nowadays, the technical field of automobile electronics is changing day by day, and more electronic products are more and more humanized so as to meet the pursuit of people on factors such as comfort, safety, intellectualization and the like. The blind area monitoring radar can help a driver to monitor the position of the blind area at the rear part of the automobile in the driving process, and once the blind area risk occurs, the blind area monitoring automobile radar system can remind the driver or the forced control automobile to carry out risk avoiding operation in time, and meanwhile, the blind area monitoring automobile radar system is installed more quickly and is suitable for various automobile types. Therefore, the blind area monitoring automobile radar system becomes the mainstream with the characteristics of quick installation, safety and the like.
At present, blind area monitoring automobile radar systems are implemented in various ways, and the most typical structure is that a plurality of single radars with narrow horizontal field angles are adopted to cover certain area angles respectively, and space division coverage is implemented by using a space distribution principle, so that the radar system based on the narrow horizontal field angles usually needs to adopt a double-radar or triple-radar structure and is installed on the left side and the right side of the tail part of an automobile or on the left side, the middle side and the right side. However, such conventional structures have certain drawbacks: firstly, the cost and the power consumption are increased, and on the premise of the same power consumption, the increase of a single radar means that the power consumption of a circuit and the cost of the radar are doubled; secondly, the installation process is complicated, and the double radar and the multiple radars are often installed by drilling holes at different positions of the tail of the automobile, so that the installation process is complicated and time-consuming; and after the radar reflecting surfaces of the double radar and the multiple radars appear in the area, signal decision judgment is needed frequently, the misjudgment risk is increased, and the sensitivity is reduced.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a car millimeter wave radar early warning system is provided to overcome the defect that the blind area monitoring car radar system of current two radars and many radars exists.
The utility model provides an above-mentioned technical problem's technical scheme as follows: an automotive millimeter wave radar early warning system, comprising: the system comprises an ultra-wide horizontal field angle antenna, a millimeter wave radar transceiver module, a control assembly communication module, a driving position early warning module, a vehicle information collection module, a left reflector early warning module and a right reflector early warning module;
the control assembly communication module sends the signal to the millimeter wave radar transceiver module, and the signal enters the ultra-wide horizontal field angle antenna after being processed by the transmitting channel and is radiated to a free space; the ultra-wide horizontal field angle antenna can also receive radar reflection signals from a free space, enter a receiving channel in the millimeter wave radar transceiver module, are converted into baseband processing signals after being processed, enter the control assembly communication module, and the control assembly communication module performs detection and judgment by combining signals of the vehicle information collection module and the like and then outputs the signals to the driving position early warning module, the left reflector early warning module and the right reflector early warning module, so that real-time monitoring and control of blind areas of the automobile are realized.
The utility model has the advantages that: the utility model discloses can only rely on one set of super wide horizontal angle of vision antenna, millimeter wave radar transceiver module and control assembly communication module, just can realize that blind area monitoring, lane change under the single radar condition are supplementary, the early warning of opening the door, rear traffic are walked the early warning and are five blind area monitoring functions to the collision early warning after, make on-vehicle millimeter wave radar system installation more simple and convenient, it is more convenient to use.
Further, the ultra-wide horizontal field angle antenna comprises an ultra-wide horizontal field angle receiving antenna and an ultra-wide horizontal field angle transmitting antenna. The ultra-wide horizontal field angle receiving antenna is used for receiving radar reflected wave signals and enabling the radar reflected wave signals to enter a receiving channel of the millimeter wave radar receiving and transmitting module, the ultra-wide horizontal field angle transmitting antenna is used for transmitting radiation signals of the millimeter wave radar receiving and transmitting module to radiate to a free space, and the ultra-wide horizontal field angle receiving antenna and the ultra-wide horizontal field angle transmitting antenna can be different in structure and can also be the same in structure. The ultra-wide horizontal field angle receiving antenna and the ultra-wide horizontal field angle transmitting antenna can realize wide beams in the horizontal plane direction and are used for increasing the radar near-field horizontal field angle detection area; and multi-antenna narrow beam aggregation can be realized to increase the radar far-field detection distance.
The beneficial effects of the further scheme are as follows: the radar receiving and transmitting antenna has an ultra-wide field angle in the horizontal plane direction, the radar detection area is effectively increased, the complexity of an automobile blind area monitoring radar system is effectively reduced, and meanwhile, the antenna also has two working modes of a near field and a far field.
Further, the millimeter wave radar transceiver module is configured to receive or transmit a millimeter wave signal from the ultra-wide horizontal field angle antenna, and convert the millimeter wave signal into a corresponding baseband processing signal according to a difference in frequency, phase, amplitude, duration, and the like of the reflected wave signal.
The beneficial effects of the further scheme are as follows: the radar transceiver module can convert information of three dimensions of frequency, phase and amplitude of radar reflection waves into corresponding baseband signals, and the algorithm and the process for realizing target processing by the time division-multiple antenna (TD-MIMO) radar algorithm are convenient for the control assembly communication module.
Further, the control assembly communication module comprises a signal target judgment processing unit and an alarm control comprehensive processing unit, wherein the target judgment processing unit adopts a time division-multiple antenna (TD-MIMO) radar algorithm to realize algorithms and processes of completely different target detection, target aggregation, target tracking, target alarm and the like on long-distance targets and short-distance targets according to a threshold amplitude value of a baseband processing signal and a relative variation of signal variation duration time width as judgment bases, wherein the radar adopts different signal processing modes on the left target and the right target and respectively carries out parameter optimization and calibration, an operation result is sent to the alarm control comprehensive processing unit, alarm information of the left target and the right target is logically and simultaneously processed, and whether blind area monitoring is met or not is judged by combining vehicle information, control information, terminal information and the like fed back by the vehicle information collection module, The method comprises the following steps of lane changing assistance, door opening early warning, rear traffic crossing early warning and rear collision early warning, and sending judgment results to a driving position early warning module, a left reflector early warning module and a right reflector early warning module.
The beneficial effects of the further scheme are as follows: the time division-multiple antenna (TD-MIMO) radar algorithm can replace the traditional multiple radar antenna functions of target detection, target aggregation, target tracking and the like, the corresponding speed of the radar system can be greatly improved by utilizing the software algorithm, and completely different tracking processing of more than 32 multi-target signals can be supported to remote and close targets simultaneously based on the algorithm, so that the radar system can conveniently carry out efficient and accurate blind area monitoring, lane changing assistance, door opening early warning, rear traffic crossing early warning and rear collision early warning, the more the blind area monitoring functions are, and the higher the product additional value is.
Further, the vehicle information collection module comprises a vehicle information collection interface and a signal set judgment unit, and is used for receiving and judging vehicle information, control information, terminal information and the like.
The beneficial effects of the further scheme are as follows: the vehicle information collection module can provide related vehicle information for the control assembly communication module, and can meet the requirements of all related elements such as collision time, gears, vehicle speed, steering wheel rotation angle and the like, and carry out joint judgment and alarm. The method can greatly reduce the false alarm missing and improve the customer experience and the product reliability.
Furthermore, the driving position early warning module, the left reflector early warning module and the right reflector early warning module respectively comprise an early warning signal judgment unit and an early warning unit, the early warning signal judgment unit is used for judging the type of the early warning information, and the early warning unit is used for transmitting sound and light signals of the early warning information and the like.
The beneficial effects of the further scheme are as follows: the method can meet the related ISO17387 standard and the latest national standard, and alarm is really carried out only in a blind area, so that the key of customer experience and product availability is improved.
Drawings
FIG. 1 is a schematic block diagram of the millimeter wave radar early warning system for a vehicle according to the present invention;
FIG. 2 is a schematic structural diagram of the millimeter wave radar early warning system for automobiles of the present invention;
fig. 3 is the utility model discloses a realizable blind area monitoring of car millimeter wave radar early warning system: the system is a schematic diagram of five functions of blind area monitoring (BSD), Lane Change Assistance (LCA), door opening early warning (DOW), rear traffic crossing early warning (RCTA) and backward collision early warning (RCW).
Detailed Description
Exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It is to be understood that the embodiments shown and described in the drawings are merely exemplary and are intended to illustrate the principles and spirit of the invention, not to limit the scope of the invention.
The embodiment of the utility model provides an automobile millimeter wave radar early warning system, the utility model provides a technical scheme as follows of above-mentioned technical problem: an automotive millimeter wave radar early warning system, comprising: the system comprises an ultra-wide horizontal field angle antenna, a millimeter wave radar transceiver module, a control assembly communication module, a driving position early warning module, a vehicle information collection module, a left reflector early warning module and a right reflector early warning module;
as shown in fig. 1, the control assembly communication module sends a signal to the millimeter wave radar transceiver module, and the signal enters the ultra-wide horizontal field angle antenna after being processed by the transmission channel and is radiated to a free space; the ultra-wide horizontal field angle antenna can also receive radar reflection signals from a free space, enter a receiving channel in the millimeter wave radar transceiver module, are converted into baseband processing signals after being processed, enter the control assembly communication module, and the control assembly communication module performs detection and judgment by combining signals of the vehicle information collection module and the like and then outputs the signals to the driving position early warning module, the left reflector early warning module and the right reflector early warning module, so that real-time monitoring and control of blind areas of the automobile are realized.
As shown in fig. 2, the ultra-wide horizontal field angle antenna includes an ultra-wide horizontal field angle receiving antenna and an ultra-wide horizontal field angle transmitting antenna. The ultra-wide horizontal field angle receiving antenna is used for receiving radar reflected wave signals and enabling the radar reflected wave signals to enter a receiving channel of the millimeter wave radar receiving and transmitting module, the ultra-wide horizontal field angle transmitting antenna is used for transmitting radiation signals of the millimeter wave radar receiving and transmitting module to radiate to a free space, and the ultra-wide horizontal field angle receiving antenna and the ultra-wide horizontal field angle transmitting antenna can be different in structure and can also be the same in structure. The ultra-wide horizontal field angle receiving antenna and the ultra-wide horizontal field angle transmitting antenna can realize wide beams in the horizontal plane direction and are used for increasing the radar near-field horizontal field angle detection area; and multi-antenna narrow beam aggregation can be realized to increase the radar far-field detection distance. As an example of the present invention, the ultra-wide horizontal field angle antenna may be a two-transmission four-reception mode, i.e., two ultra-wide horizontal field angle receiving antenna branches and four ultra-wide horizontal field angle transmitting antenna branches. In addition, the scheme can also adopt a multi-sending and multi-receiving mode.
As shown in fig. 2, the millimeter wave radar transceiver module is configured to receive or transmit a millimeter wave signal from the ultra-wide horizontal field angle antenna, and convert the millimeter wave signal into a corresponding baseband processing signal according to a difference in frequency, phase, amplitude, duration, and the like of the reflected wave signal.
As shown in fig. 2, the control assembly communication module includes a signal target decision processing unit and an alarm control comprehensive processing unit, the target decision processing unit uses a time division-multiple antenna (TD-MIMO) radar algorithm to perform completely different target detection, target aggregation, target tracking, target alarm and other algorithms and processes on long-distance and short-distance targets according to the relative variation of the threshold amplitude value and the signal variation duration of the baseband processing signal, wherein the radar performs different signal processing methods on the left and right targets and performs parameter optimization and calibration respectively, sends the operation result to the alarm control comprehensive processing unit, processes the alarm information of the left and right targets logically and simultaneously, and determines whether blind area monitoring (BSD) is met or not according to the vehicle information, control information, terminal information and the like fed back by the vehicle information collection module, Five judgment conditions of Lane Change Assistance (LCA), door opening early warning (DOW), rear traffic crossing early warning (RCTA) and backward collision early warning (RCW) are shown in figure 3, and judgment results are sent to the driving position early warning module, the left reflector early warning module and the right reflector early warning module.
The five BSD (blind zone monitoring) conditions are as follows, and the activation conditions of the function of the blind zone monitoring (BSD) are that the vehicle runs and the speed is more than 15 km/h; target speed > -10 km/h; early warning range: the column A is 8 meters in the longitudinal direction and 0.5 to 3.5 meters in the transverse direction; early warning grade: turn light off (on): primary (secondary) start-up); LCA (lane change assist) function activation conditions that the vehicle is running and the vehicle speed is more than 15 km/h; time to collision (timetocoprecision) TTC <3.5 s; early warning range: the longitudinal direction is 8-70 meters, and the transverse direction is 0.5-3.5 meters; early warning grade: turn light off (on): primary (secondary); DOW (door opening early warning) function activation conditions are that the vehicle speed is less than 5 km/h; the target speed is more than 5 km/h; TTC <2.5 s; early warning range: column A is 70 meters in the longitudinal direction and 0 meter 2 meter in the transverse direction; early warning grade: second-stage; RCTA (reverse crossing warning) function activating conditions that the vehicle backs and the speed is less than 15 km/h; the target speed is more than 15 km/h; TTC <2.5 s; early warning range: 0-6 m in the longitudinal direction and 0-30 m in the transverse direction; early warning grade: second-stage; RCW (backward collision warning) function activation conditions are that the target speed is more than 50 km/h; TTC <1.5 s; early warning range: the longitudinal direction is 0-70 m, and the transverse vehicle width is wide; early warning grade: second-stage;
as shown in fig. 2, the vehicle information collection module includes a vehicle information collection interface and a signal set decision unit for receiving and deciding vehicle information, control information, terminal information, and the like.
As shown in fig. 2, the driving position early warning module, the left reflector early warning module and the right reflector early warning module all include an early warning signal decision unit and an early warning unit, the early warning signal decision unit is used for deciding the type of the early warning information, and the early warning unit is used for emitting sound and light signals of the early warning information.
The following introduces the specific working principle and process of the present invention with reference to fig. 2:
the control assembly communication module sends a digital baseband control signal to the millimeter wave radar transceiver module, the digital baseband control signal enters the ultra-wide horizontal field angle antenna after the processing of frequency conversion, filtering, power amplification and the like of a transmitting channel and is radiated to a free space, the ultra-wide horizontal field angle antenna can also receive a radar reflection signal from the free space, the radar reflection signal enters a receiving channel of the millimeter wave radar transceiver module and is converted into a baseband signal after the processing of amplification, frequency conversion and the like, the baseband signal enters the control assembly communication module, the control assembly communication module judges whether the signal meets the requirements of five-power early warning for blind area monitoring or not through signal target judgment processing, and then the baseband signal enters the alarm control comprehensive processing unit, and the control assembly communication module simultaneously outputs the signal to the driving position early warning module, the left reflector early warning module and the right reflector early warning module after the detection and judgment of the signal in combination, and the real-time monitoring and control of the dead zone of the automobile are realized.
It will be appreciated by those of ordinary skill in the art that the embodiments described herein are intended to assist the reader in understanding the principles of the invention, and it is to be understood that the scope of the invention is not limited to such specific statements and embodiments. Those skilled in the art can make various other specific modifications and combinations based on the teachings of the present invention without departing from the spirit of the invention, and such modifications and combinations are still within the scope of the invention.
Claims (6)
1. The utility model provides an automobile millimeter wave radar early warning system which characterized in that includes: the system comprises an ultra-wide horizontal field angle antenna, a millimeter wave radar transceiver module, a control assembly communication module, a driving position early warning module, a vehicle information collection module, a left reflector early warning module and a right reflector early warning module;
the control assembly communication module sends a signal to the millimeter wave radar transceiver module, and the signal enters the ultra-wide horizontal field angle antenna after being processed by a transmitting channel of the millimeter wave radar transceiver module and is radiated to a free space; the ultra-wide horizontal field angle antenna is used for receiving radar reflection signals from a free space, entering a receiving channel in the millimeter wave radar transceiver module, converting the radar reflection signals into baseband processing signals after processing, entering the control assembly communication module, combining the signals of the vehicle information collection module, carrying out detection judgment, and then outputting the signals to the driving position early warning module, the left reflector early warning module and the right reflector early warning module, so that real-time monitoring and control of blind areas of the automobile are realized.
2. The automotive millimeter wave radar early warning system according to claim 1, wherein the ultra-wide horizontal field of view antenna comprises an ultra-wide horizontal field of view receiving antenna and an ultra-wide horizontal field of view transmitting antenna; the ultra-wide horizontal field angle receiving antenna is used for receiving radar reflected wave signals and entering a receiving channel of the millimeter wave radar transceiver module, the ultra-wide horizontal field angle transmitting antenna is used for transmitting radiation signals of the millimeter wave radar transceiver module to radiate to a free space, and the ultra-wide horizontal field angle receiving antenna and the ultra-wide horizontal field angle transmitting antenna are realized by adopting the same or different structures; the ultra-wide horizontal field angle receiving antenna and the ultra-wide horizontal field angle transmitting antenna can realize wide beams in the horizontal plane direction and are used for increasing the radar near-field horizontal field angle detection area; and multi-antenna narrow beam aggregation can be realized, so that the radar far-field detection distance is increased.
3. The millimeter wave radar early warning system for automobiles of claim 1, wherein the millimeter wave radar transceiver module is configured to receive or transmit millimeter wave signals from an ultra-wide horizontal field angle antenna, and convert the millimeter wave signals into corresponding baseband processing signals according to differences in frequency, phase, amplitude, and duration of reflected wave signals.
4. The millimeter wave radar warning system for automobiles of claim 1, wherein the control assembly communication module comprises a signal target decision processing unit and an alarm control comprehensive processing unit, the target decision processing unit uses the threshold amplitude value and the relative variation of the signal variation duration as the decision basis according to the baseband processing signal, and adopts time division-multiple antenna (TD-MIMO) radar algorithm to realize completely different target detection, target aggregation, target tracking, target alarm algorithm and process for long-distance and short-distance targets, wherein the radar adopts different signal processing modes for the left and right targets, and performs parameter optimization and calibration respectively, and sends the operation result to the alarm control comprehensive processing unit, the alarm logic processes the alarm information of the left and right targets simultaneously, and combines the vehicle information fed back by the vehicle information collection module, And judging whether the judgment conditions of the control information and the terminal information meet the five judgment conditions of blind area monitoring, lane change assistance, door opening early warning, rear traffic passing early warning and rear collision early warning, and sending judgment results to the driving position early warning module, the left reflector early warning module and the right reflector early warning module.
5. The automotive millimeter wave radar early warning system as claimed in claim 1, wherein the vehicle information collection module comprises a vehicle information collection interface and a signal set decision unit, and is configured to receive and decide vehicle information, control information and terminal information.
6. The automotive millimeter wave radar early warning system according to claim 1, wherein the driving position early warning module, the left reflector early warning module and the right reflector early warning module each comprise an early warning signal judgment unit and an early warning unit, the early warning signal judgment unit is used for judging the type of the early warning information, and the early warning unit is used for emitting sound and light signals of the early warning information.
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| CN202020152684.8U CN212301877U (en) | 2020-02-05 | 2020-02-05 | Automobile millimeter wave radar early warning system |
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| CN202020152684.8U CN212301877U (en) | 2020-02-05 | 2020-02-05 | Automobile millimeter wave radar early warning system |
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