CN110803104A - Vehicle door blind area monitoring system, monitoring method and vehicle - Google Patents
Vehicle door blind area monitoring system, monitoring method and vehicle Download PDFInfo
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- CN110803104A CN110803104A CN201911082575.1A CN201911082575A CN110803104A CN 110803104 A CN110803104 A CN 110803104A CN 201911082575 A CN201911082575 A CN 201911082575A CN 110803104 A CN110803104 A CN 110803104A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
- B60Q9/00—Arrangement or adaptation of signal devices not provided for in one of main groups B60Q1/00 - B60Q7/00, e.g. haptic signalling
- B60Q9/008—Arrangement or adaptation of signal devices not provided for in one of main groups B60Q1/00 - B60Q7/00, e.g. haptic signalling for anti-collision purposes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R1/00—Optical viewing arrangements; Real-time viewing arrangements for drivers or passengers using optical image capturing systems, e.g. cameras or video systems specially adapted for use in or on vehicles
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
- G01S13/06—Systems determining position data of a target
- G01S13/08—Systems for measuring distance only
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/88—Radar or analogous systems specially adapted for specific applications
- G01S13/93—Radar or analogous systems specially adapted for specific applications for anti-collision purposes
- G01S13/931—Radar or analogous systems specially adapted for specific applications for anti-collision purposes of land vehicles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R2300/00—Details of viewing arrangements using cameras and displays, specially adapted for use in a vehicle
- B60R2300/80—Details of viewing arrangements using cameras and displays, specially adapted for use in a vehicle characterised by the intended use of the viewing arrangement
- B60R2300/802—Details of viewing arrangements using cameras and displays, specially adapted for use in a vehicle characterised by the intended use of the viewing arrangement for monitoring and displaying vehicle exterior blind spot views
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R2300/00—Details of viewing arrangements using cameras and displays, specially adapted for use in a vehicle
- B60R2300/80—Details of viewing arrangements using cameras and displays, specially adapted for use in a vehicle characterised by the intended use of the viewing arrangement
- B60R2300/8093—Details of viewing arrangements using cameras and displays, specially adapted for use in a vehicle characterised by the intended use of the viewing arrangement for obstacle warning
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- Radar, Positioning & Navigation (AREA)
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Abstract
The embodiment of the invention provides a vehicle door blind area monitoring system, a vehicle door blind area monitoring method and a vehicle. The vehicle door blind area monitoring system provided by the embodiment of the invention can provide reliable blind area monitoring when a vehicle stops, and is not influenced by the change of the external natural environment.
Description
Technical Field
The invention relates to the technical field of automobile safety, in particular to a vehicle door blind area monitoring system, a vehicle door blind area monitoring method and a vehicle.
Background
With the rapid development of the automobile industry due to the economic growth and the technological progress, automobiles gradually enter the lives of people and become an essential part since the invention. With the increasing of the automobile holding capacity, the traffic pressure is gradually increased, so that a series of traffic safety problems are caused, and the accidents of taking a bus and going out are frequent. Traffic accidents are caused by various reasons, and about one third of the accidents are caused by vehicle blind areas. Therefore, the harm of the vehicle blind area is not small and varied, and the design and research of an effective and reliable vehicle blind area monitoring system becomes a research hotspot in the field of vehicle active safety.
At present, various blind area monitoring schemes are applied to vehicles. For example, a blind spot Information System (BLIS) monitors road conditions on both sides of a vehicle by using a camera, monitors a blind zone of a rearview mirror at a speed of 25 frames per second by using a camera on the rearview mirror, and has a monitoring range with a width of about 3m and a length of 10 m. When a vehicle or a pedestrian enters a blind area, the BLIS judges whether potential safety hazards exist in the blind area or not by comparing the distance between a target and the vehicle in the image, and if the potential safety hazards exist, the driver is reminded to pay attention through a warning lamp on the rearview mirror. The lateral auxiliary system (Audi Side Assist) monitors the blind area of the vehicle through a millimeter wave radar, the system starts to work when the vehicle speed exceeds 60km/h, the vehicle within 50m behind the vehicle can be monitored, and when the lateral auxiliary system judges that potential safety hazards exist in the blind area, warning lights arranged on the frames of the left rear-view mirror and the right rear-view mirror can be turned on to play a role in warning a driver. Researchers research a video-based bicycle monitoring method, and judge whether a bicycle is in a window space of a vehicle or not by comparing the positions of the same bicycle in a plurality of images, so that the bicycles around the vehicle are monitored in real time. Researchers also propose that the industrial camera is used for obtaining the driving track, and the monitoring of the lane deviation of the vehicle is successfully realized.
At present, most of blind area monitoring systems are mainly used in the driving process of vehicles, and when the vehicles stop or are lower than a certain speed, the blind area monitoring systems cannot be started, and mainly monitor the blind areas at the front and the rear of the vehicles. However, when the vehicle is parked and the door is opened, there is a certain potential safety hazard, and there are few examples of accidents with surrounding pedestrians or vehicles caused by opening the vehicle because the vehicle interior personnel do not pay attention to the road conditions beside the door or cannot observe the vehicle in the blind area of the door.
Therefore, the vehicle door blind area monitoring system, the vehicle door blind area monitoring method and the vehicle have a positive effect on improving safety when the vehicle door is opened.
Disclosure of Invention
To overcome the above problems or at least partially solve the above problems, embodiments of the present invention provide a vehicle door blind area monitoring system, a monitoring method, and a vehicle.
In a first aspect, an embodiment of the present invention provides a vehicle door blind area monitoring system, including: the radar is connected with the micro-control unit;
the B columns and the C columns on two sides of the vehicle and the rearview mirrors on two sides of the vehicle are respectively provided with the radar, the radar is used for transmitting electromagnetic wave signals, receiving the electromagnetic wave signals reflected by obstacles and determining the time difference between the receiving action and the transmitting action;
and the micro control unit is used for determining the distance between the obstacles on two sides of the vehicle and the radar based on the time difference, and determining that potential safety hazards exist in the door blind area of the vehicle if the distance is judged to be smaller than a preset threshold value.
Preferably, the vehicle door blind area monitoring system further includes: a voice prompt unit;
the voice prompt unit is connected with the micro control unit;
the voice prompt unit is used for carrying out voice prompt when potential safety hazards exist in the vehicle door blind area of the vehicle.
Preferably, the micro control unit is further configured to:
and determining the positions of the obstacles on the two sides of the vehicle according to a triangulation method based on the distance between the obstacles on the two sides of the vehicle and the radar and the position of the radar.
Preferably, the micro control unit is connected with an on-board display of the vehicle;
the vehicle-mounted display is used for displaying the positions of obstacles on two sides of the vehicle.
Preferably, the micro control unit is further configured to:
monitoring the running state of the vehicle and the central locking state of the vehicle;
and controlling the working state of the radar based on the running state of the vehicle and the central control lock state.
Preferably, the radar is a millimeter wave radar.
Preferably, the vehicle door blind area monitoring system further includes: a power supply unit;
the power supply unit is used for supplying power to the vehicle door blind area monitoring system.
In a second aspect, an embodiment of the present invention provides a vehicle door blind area monitoring method, including:
acquiring time difference sent by radars on two sides of a vehicle, wherein the radars are respectively arranged on rearview mirrors on the two sides of the vehicle and on a B column and a C column on the two sides of the vehicle, and the time difference is the time difference between a receiving action and a transmitting action when the radars receive electromagnetic wave signals reflected by an obstacle after transmitting electromagnetic waves;
and determining the distance between the obstacles on the two sides of the vehicle and the radar based on the time difference, and determining that potential safety hazards exist in the door blind area of the vehicle if the distance is judged to be smaller than a preset threshold value.
Preferably, before the obtaining the time difference of the radar transmission on both sides of the vehicle, the method further comprises:
monitoring the running state of the vehicle and the central control lock state of the vehicle;
and controlling the working state of the radar based on the running state of the vehicle and the central control lock state.
In a third aspect, an embodiment of the present invention provides a vehicle, including: the vehicle door blind area monitoring system according to the first aspect.
According to the vehicle door blind area monitoring system, the vehicle door blind area monitoring method and the vehicle, the plurality of radars are arranged on the two sides of the vehicle, the distance between obstacles on the two sides of the vehicle and each radar can be determined, when the distance is smaller than the preset threshold value, the potential safety hazard in the vehicle door blind area of the vehicle is determined, and casualties caused by collision with surrounding pedestrians or vehicles when the vehicle door is opened can be prevented and reduced under various environmental conditions. The vehicle door blind area monitoring system provided by the embodiment of the invention can provide reliable blind area monitoring when a vehicle stops, and is not influenced by the change of the external natural environment.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a vehicle door blind area monitoring system according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a triangulation method adopted by a micro control unit in the vehicle door blind area monitoring system according to the embodiment of the present invention;
FIG. 3 is a schematic flow chart of a method for monitoring a blind area of a vehicle door according to an embodiment of the present invention;
fig. 4 is a schematic view of a complete flow of a vehicle door blind area monitoring method according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the embodiments of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the referred devices or elements must have specific orientations, be configured in specific orientations, and operate, and thus, should not be construed as limiting the embodiments of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the embodiments of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. Specific meanings of the above terms in the embodiments of the present invention can be understood in specific cases by those of ordinary skill in the art.
The embodiment of the invention provides a vehicle door blind area monitoring system, which comprises: the radar is connected with the micro-control unit;
the B columns and the C columns on two sides of the vehicle and the rearview mirrors on two sides of the vehicle are respectively provided with the radar, the radar is used for transmitting electromagnetic wave signals, receiving the electromagnetic wave signals reflected by obstacles and determining the time difference between the receiving action and the transmitting action;
and the micro control unit is used for determining the distance between the obstacles on two sides of the vehicle and the radar based on the time difference, and determining that potential safety hazards exist in the door blind area of the vehicle if the distance is judged to be smaller than a preset threshold value.
The embodiment of the invention provides a vehicle door blind area monitoring system, which is mainly applied to real-time monitoring of a vehicle door blind area when a vehicle stops so as to determine whether the vehicle door blind area has potential safety hazards. Fig. 1 is a schematic installation diagram of a vehicle door blind area monitoring system provided in an embodiment of the present invention. The vehicle door blind area monitoring system comprises a radar and a Micro Controller Unit (MCU), the MCU is arranged in a cab of a vehicle, and the vehicle is a target vehicle for determining whether a vehicle door blind area has potential safety hazards. The radar is arranged at the position shown in fig. 1, and the radars a and b in fig. 1 are respectively arranged on rearview mirrors on two sides of a vehicle, and particularly can be arranged on A columns on two sides of the vehicle, wherein the A columns are positioned between a nacelle and a cab of the vehicle. Radars C and d are respectively arranged on the B columns on two sides of the vehicle, and radars e and f are respectively arranged on the C columns on two sides of the vehicle. The B-pillar is located in the middle of the vehicle body, between the front and rear seats of the cabin, extending from the roof to the underbody. The C column is positioned at the tail part of the vehicle body and on two sides of the back seat headrest. Wherein the a, B and C columns are not shown in fig. 1. The scanning areas of the radars a, b, c, d, e and f together form a monitoring area of the vehicle door blind area monitoring system. The microcontroller unit and the column are not shown in fig. 1. The scanning ranges of the radars a and b are backward, and the scanning ranges of the radars c, d, e and f are towards the two sides of the vehicle.
Each radar is used for transmitting an electromagnetic wave signal, receiving the electromagnetic wave signal reflected by an obstacle and determining the time difference between a receiving action and a transmitting action. The obstacle is a radar which makes the electromagnetic wave signal not tender and continuously propagate in the scanning process and reflects the electromagnetic wave signal to be transmitted. The obstacle may be a pedestrian, another vehicle, or the like on both sides of the vehicle, which is not particularly limited in the embodiment of the present invention.
The radar is connected with the micro control unit, and the radar can actively send the determined time difference to the micro control unit and can also be actively acquired by the micro control unit. And the micro control unit calculates the distance between the obstacles on two sides of the vehicle and each radar according to the time difference determined by each radar.
The calculation formula is as follows:
wherein d is the distance between the obstacles on the two sides of the vehicle and the radar, c is the propagation speed of the electromagnetic wave signal, and t is the time difference between the electromagnetic wave signal reflected by the obstacle and the transmitted electromagnetic wave signal determined by the radar.
When the distance is smaller than the preset threshold value, the potential safety hazard exists in the door blind area of the vehicle, namely, the barrier is arranged at the position, close to the two sides of the vehicle, so that the potential safety hazard exists in the door blind area. Here, the preset threshold value is a minimum distance between the radar and obstacles on both sides of the vehicle when the door blind area does not have a potential safety hazard. The door blind area refers to an area where it is impossible to determine whether an obstacle exists on both sides of the vehicle.
According to the vehicle door blind area monitoring system provided by the embodiment of the invention, the distance between obstacles on two sides of the vehicle and each radar can be determined by arranging the plurality of radars on two sides of the vehicle, when the distance is smaller than the preset threshold value, the potential safety hazard in the vehicle door blind area of the vehicle is determined, and casualties caused by collision with surrounding pedestrians or vehicles when the vehicle door is opened can be prevented and reduced under various environmental conditions. The vehicle door blind area monitoring system provided by the embodiment of the invention can provide reliable blind area monitoring when a vehicle stops, and is not influenced by the change of the external natural environment.
On the basis of the above embodiment, the vehicle door blind area monitoring system provided in the embodiment of the present invention further includes: a voice prompt unit;
the voice prompt unit is connected with the micro control unit;
the voice prompt unit is used for carrying out voice prompt when potential safety hazards exist in the vehicle door blind area of the vehicle.
Specifically, the vehicle door blind area monitoring system provided by the embodiment of the invention introduces the voice prompt unit, the voice prompt unit and the micro control unit, and the micro control unit controls the voice prompt unit to be opened and closed. When the micro control unit determines that potential safety hazards exist in the vehicle door blind area of the vehicle, voice prompt is carried out through the voice prompt unit, safety warning is sent to personnel in the vehicle, the vehicle door is opened, the personnel in the vehicle can timely notice that the potential safety hazards exist in the vehicle door blind area, and accidents caused by the fact that the personnel in the vehicle cannot timely notice that the potential safety hazards exist in the vehicle door blind area are avoided.
On the basis of the above embodiment, in the vehicle door blind area monitoring system provided in the embodiment of the present invention, the micro control unit is further configured to:
and determining the positions of the obstacles on the two sides of the vehicle according to a triangulation method based on the distance between the obstacles on the two sides of the vehicle and the radar and the position of the radar.
Specifically, in the embodiment of the invention, in order to enable a driver to know the conditions of the two sides of the vehicle in more detail, the positions of the obstacles on the two sides of the vehicle can be determined according to the distances between the obstacles on the two sides of the vehicle and the radar and by combining the positions of the radar according to a triangulation method, so as to be referred by the personnel in the vehicle.
As shown in fig. 2, the radar b, d, and f mounted on the vehicle side are taken as an example, and the positions of the radars b, d, and f are respectively b (x)1，y1)、d(x2，y2)、f(x3，y3). The micro control unit respectively determines the distance between the obstacle o and each radar according to the time difference determined by the radars b, d and f, wherein R is the distance between the obstacle o and each radar1、R2、R3. According to the triangulation method, b, d, f are respectively used as the original centers, R is used1、R2、R3The radius is plotted as a circle, and the intersection point of the three circles is the position of the obstacle o. Assuming that the position of the obstacle o is o (x, y), the position can be determined according to the following formula:
in the embodiment of the invention, the positions of the obstacles on the two sides of the vehicle can be determined according to the distance between the obstacles on the two sides of the vehicle and the radar and the positions of the radar by combining a triangulation method, so that a driver can know the conditions on the two sides of the vehicle and the directions of the obstacles on the two sides of the vehicle in more detail.
On the basis of the above embodiment, in the vehicle door blind area monitoring system provided in the embodiment of the present invention, the micro control unit is connected to a vehicle-mounted display of the vehicle;
the vehicle-mounted display is used for displaying the positions of obstacles on two sides of the vehicle.
Specifically, in the embodiment of the invention, the micro control unit can be connected with the vehicle-mounted display of the vehicle, and the vehicle-mounted display is controlled by the micro control unit, so that the positions of the obstacles on the two sides of the vehicle can be displayed by the vehicle-mounted display, and a driver can know the conditions on the two sides of the vehicle more visually.
It should be noted that, in the embodiment of the present invention, the positions of the obstacles on the two sides of the vehicle may also be prompted by the voice prompting unit.
On the basis of the above embodiment, in the vehicle door blind area monitoring system provided in the embodiment of the present invention, the micro control unit is further configured to:
monitoring the running state of the vehicle and the central locking state of the vehicle;
and controlling the working state of the radar based on the running state of the vehicle and the central control lock state.
Specifically, in the embodiment of the invention, the working state of the radar can be controlled through the micro control unit, and the working state of the radar comprises starting and closing, so that the switch control of the whole vehicle door blind area monitoring system is realized, and the resources are saved. Specifically, the operating state of the vehicle and the central locking state of the vehicle may be monitored first. The running state of the vehicle may include running and stationary, and may be judged by judging the running speed of the vehicle. If the running speed of the vehicle is greater than 0, the running state of the vehicle is running, and if the running speed of the vehicle is equal to 0, the running state of the vehicle is stationary, i.e., the vehicle is stopped. The central locking state of the vehicle CAN comprise opening and closing, and CAN be read from a CAN bus of the vehicle in real time through a micro control unit. The central locking state of the vehicle can be used for representing whether the door of the vehicle is to be opened or not, when the central locking state of the vehicle is opened, the door of the vehicle is to be opened, and when the central locking state of the vehicle is closed, the door of the vehicle is not to be opened within a period of time.
The micro control unit controls the working state of the radar according to the running state and the central control lock state, and can control the working state of the radar to be open when the running state of the vehicle is static and the central control lock state of the vehicle is open, namely the micro control unit controls the vehicle door blind area monitoring system to be started.
The embodiment of the invention provides a vehicle door blind area monitoring system, which gives a judgment standard of an application scene, so that the vehicle door blind area monitoring system can automatically judge whether a potential safety hazard exists in a vehicle door blind area when a vehicle door is opened after the vehicle is parked, and automatic operation is realized.
On the basis of the above embodiment, in the vehicle door blind area monitoring system provided in the embodiment of the present invention, the radar is a millimeter wave radar.
Specifically, in order to ensure that the monitoring result of the vehicle door blind area monitoring system is not interfered, the radar in the embodiment of the invention can adopt a millimeter wave radar, so that the monitoring result is more accurate.
On the basis of the above embodiment, the vehicle door blind area monitoring system provided in the embodiment of the present invention further includes: a power supply unit;
the power supply unit is used for supplying power to the vehicle door blind area monitoring system.
Specifically, in the embodiment of the invention, the power supply unit is provided for the vehicle door blind area monitoring system so as to provide a reliable and stable power supply for the vehicle door blind area monitoring system, and a separate power supply unit is not needed, but the power supply of the vehicle is directly adopted to supply power for the vehicle door blind area monitoring system, so that the cost can be saved.
As shown in fig. 3, on the basis of the above embodiment, an embodiment of the present invention provides a vehicle door blind area monitoring method, including:
s1, acquiring time difference sent by radars on two sides of a vehicle, wherein the radars are respectively arranged on rearview mirrors on two sides of the vehicle and on a B column and a C column on two sides of the vehicle, and the time difference is the time difference between a receiving action and a transmitting action when the radar receives the electromagnetic wave signals reflected by an obstacle after transmitting an electromagnetic wave;
and S2, determining the distance between the obstacles on the two sides of the vehicle and the radar based on the time difference, and determining that potential safety hazards exist in the door blind area of the vehicle if the distance is judged to be smaller than a preset threshold value.
Specifically, the operation flow of the vehicle door blind area monitoring method provided in the embodiment of the present invention corresponds to the processing process of the micro control unit in the system embodiments one to one, and the implementation effect is also consistent, which is not described in detail in the embodiment of the present invention.
On the basis of the foregoing embodiment, the vehicle door blind area monitoring method provided in the embodiment of the present invention further includes, before the obtaining of the time difference between the radar transmissions on the two sides of the vehicle:
monitoring the running state of the vehicle and the central control lock state of the vehicle;
and controlling the working state of the radar based on the running state of the vehicle and the central control lock state.
Specifically, in the embodiment of the invention, before monitoring the blind area of the vehicle door, the running state of the vehicle and the central lock state of the vehicle need to be monitored, so that the working state of the radar is controlled, and the timing for monitoring the blind area of the vehicle door is determined.
Fig. 4 is a schematic view of a complete flow of a vehicle door blind area monitoring method according to an embodiment of the present invention. In fig. 4, the MCU determines the driving state of the vehicle, i.e., determines whether the vehicle is parked, and if the vehicle is parked, reads the central lock state, determines whether the central lock state is unlocked, and if the central lock state is unlocked, the MCU controls the start of the radar, determines the time difference by the millimeter wave radar, and transmits the time difference to the MCU. If the vehicle does not stop, the MCU continuously judges the driving state of the vehicle until the vehicle stops; and if the central control lock state is closed, the MCU continues to read the central control lock state until the central control lock state is opened.
And after receiving the time difference sent by each radar, the MCU calculates the distance between each radar and the obstacles on the two sides of the vehicle, and if the distance is smaller than a preset threshold value, the MCU controls the voice prompt unit to carry out voice prompt on the blind area of the door of the vehicle so as to avoid potential safety hazards. And if the distance is greater than or equal to the preset threshold value, the MCU continues to calculate the distance between each radar and the obstacles on the two sides of the vehicle until the distance is less than the preset threshold value. The MCU can also determine the position of the barrier according to the position of each radar and the distance between each radar and the barrier on the two sides of the vehicle, and control the vehicle-mounted display to display the position of the barrier.
On the basis of the above embodiment, an embodiment of the present invention further provides a vehicle, including: a vehicle door blind area monitoring system as described in the system class embodiments above.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A vehicle door blind area monitoring system, comprising: the radar is connected with the micro-control unit;
the B columns and the C columns on two sides of the vehicle and the rearview mirrors on two sides of the vehicle are respectively provided with the radar, the radar is used for transmitting electromagnetic wave signals, receiving the electromagnetic wave signals reflected by obstacles and determining the time difference between the receiving action and the transmitting action;
and the micro control unit is used for determining the distance between the obstacles on two sides of the vehicle and the radar based on the time difference, and determining that potential safety hazards exist in the door blind area of the vehicle if the distance is judged to be smaller than a preset threshold value.
2. The vehicle door blind spot monitoring system according to claim 1, further comprising: a voice prompt unit;
the voice prompt unit is connected with the micro control unit;
the voice prompt unit is used for carrying out voice prompt when potential safety hazards exist in the vehicle door blind area of the vehicle.
3. The vehicle door blind spot monitoring system of claim 1, wherein the micro control unit is further configured to:
and determining the positions of the obstacles on the two sides of the vehicle according to a triangulation method based on the distance between the obstacles on the two sides of the vehicle and the radar and the position of the radar.
4. The vehicle door blind spot monitoring system of claim 3, wherein the micro control unit is connected to an on-board display of the vehicle;
the vehicle-mounted display is used for displaying the positions of obstacles on two sides of the vehicle.
5. The vehicle door blind spot monitoring system of claim 1, wherein the micro control unit is further configured to:
monitoring the running state of the vehicle and the central locking state of the vehicle;
and controlling the working state of the radar based on the running state of the vehicle and the central control lock state.
6. The vehicle door blind spot monitoring system of claim 1, wherein the radar is a millimeter wave radar.
7. The vehicle door blind spot monitoring system according to claim 1, further comprising: a power supply unit;
the power supply unit is used for supplying power to the vehicle door blind area monitoring system.
8. A vehicle door blind area monitoring method is characterized by comprising the following steps:
acquiring time difference sent by radars on two sides of a vehicle, wherein the radars are respectively arranged on rearview mirrors on the two sides of the vehicle and on a B column and a C column on the two sides of the vehicle, and the time difference is the time difference between a receiving action and a transmitting action when the radars receive electromagnetic wave signals reflected by an obstacle after transmitting electromagnetic waves;
and determining the distance between the obstacles on the two sides of the vehicle and the radar based on the time difference, and determining that potential safety hazards exist in the door blind area of the vehicle if the distance is judged to be smaller than a preset threshold value.
9. The vehicle door blind area monitoring method according to claim 8, characterized by, before the obtaining the time difference of radar transmission on both sides of the vehicle, further comprising:
monitoring the running state of the vehicle and the central control lock state of the vehicle;
and controlling the working state of the radar based on the running state of the vehicle and the central control lock state.
10. A vehicle, characterized by comprising: the vehicle door blind spot monitoring system as claimed in any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911082575.1A CN110803104A (en) | 2019-11-07 | 2019-11-07 | Vehicle door blind area monitoring system, monitoring method and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911082575.1A CN110803104A (en) | 2019-11-07 | 2019-11-07 | Vehicle door blind area monitoring system, monitoring method and vehicle |
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| CN111798700A (en) * | 2020-06-30 | 2020-10-20 | 北京行易道科技有限公司 | Blind area monitoring alarm method and device |
| CN112498235A (en) * | 2020-12-09 | 2021-03-16 | 浙江合众新能源汽车有限公司 | Voice prompt method and system for preventing vehicle from being scratched and bumped |
| CN112965054A (en) * | 2021-02-03 | 2021-06-15 | 南京众控电子科技有限公司 | Cabin door opening and closing identification method based on radar technology |
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