阅读说明：本技术 一种新能源汽车用倒车盲区辅助显示装置 (Auxiliary display device for reversing blind area for new energy automobile ) 是由 陈健 于 2021-08-18 设计创作，主要内容包括：本发明公开了一种新能源汽车用倒车盲区辅助显示装置,包括辅助显示装置和辅助显示系统,所述辅助显示装置包括车身,所述车身的前侧设置有前窗,所述车身的侧面设置有侧窗,所述车身的后侧设置有后窗,所述车身的两侧设置有后视镜,所述后视镜可转动,所述车身的底部四周设置有轮胎,所述车身的内部设置有传动机构,所述车身的四周安装有超声波传感器,所述车身的前侧底部安装有前视摄像头,所述车身的后侧底部安装有后视摄像头,所述前视摄像头与后视摄像头与车身的连接处设置有转动机构,所述前视摄像头与后视摄像头的外部设置有清洁机构,本发明,具有实用性强和保护用户人身安全的特点。(The invention discloses a reversing blind area auxiliary display device for a new energy automobile, which comprises an auxiliary display device and an auxiliary display system, the auxiliary display device comprises a vehicle body, a front window is arranged on the front side of the vehicle body, a side window is arranged on the side surface of the vehicle body, a rear window is arranged at the rear side of the vehicle body, rear-view mirrors are arranged at the two sides of the vehicle body and can rotate, tires are arranged on the periphery of the bottom of the vehicle body, a transmission mechanism is arranged in the vehicle body, ultrasonic sensors are arranged on the periphery of the vehicle body, a front-view camera is arranged at the bottom of the front side of the vehicle body, a rear-view camera is arranged at the bottom of the rear side of the vehicle body, the automobile rearview mirror is characterized in that the practicability is high, and the personal safety of a user is protected.)

1. The utility model provides a new energy automobile is with supplementary display device of blind area that backs a car, includes supplementary display device and supplementary display system, its characterized in that: the auxiliary display device comprises a vehicle body (1), wherein a front window (2) is arranged on the front side of the vehicle body (1), a side window (3) is arranged on the side face of the vehicle body (1), a rear window (4) is arranged on the rear side of the vehicle body (1), rear-view mirrors (5) are arranged on two sides of the vehicle body (1), and the rear-view mirrors (5) can rotate.

2. The reversing blind area auxiliary display device for the new energy automobile according to claim 1, characterized in that: the utility model discloses a vehicle body, including automobile body (1), front-view camera (9), rear-view camera (10), the bottom of automobile body (1) is provided with tire (7) all around, the inside of automobile body (1) is provided with drive mechanism, install ultrasonic sensor (8) all around of automobile body (1), front-view camera (9) are installed to the front side bottom of automobile body (1), rear-view camera (10) are installed to the rear side bottom of automobile body (1), front-view camera (9) are provided with slewing mechanism (11) with the junction of rear-view camera (10) and automobile body (1), front-view camera (9) are provided with wiper mechanism (6) with the outside of rear-view camera (10).

3. The reversing blind area auxiliary display device for the new energy automobile according to claim 2, characterized in that: the auxiliary display system comprises a display module, an integrated control module and a brake module, wherein the display module comprises an annular camera shooting unit, an ultrasonic detection unit and an image processing module, the integrated control module comprises an information processing module, a display adjusting module and a cleaning unit, the display adjusting module comprises an information transmission module and a transmission unit, the brake module comprises an alarm unit and a brake unit, the integrated control module is located inside the vehicle body (1), the cleaning unit is located inside a cleaning mechanism (12), and the display module, the integrated control module and the brake module are respectively electrically connected.

4. The reversing blind area auxiliary display device for the new energy automobile according to claim 3, characterized in that: the utility model discloses a car, including the ring direction camera unit, ultrasonic detection unit, image processing module, display adjusting module, warning unit, braking unit, display module, image processing module, information processing module, display adjusting module, display module, warning unit, braking unit, the ring direction camera unit is used for shooting the environment of people's eye blind area all around of car, ultrasonic detection unit is used for surveying car barrier all around, image processing module is used for turning into the information of surveying into the image of easily observing, information processing module is used for carrying out intelligent processing to the information of surveying, it adjusts display module to show adjusting module, clean unit is used for cleaning display module, warning unit is used for sending out the police dispatch newspaper when the car is nearer apart from the barrier, braking unit is used for forcing the brake when the car is too near apart from the barrier.

5. The reversing blind area auxiliary display device for the new energy automobile according to claim 4, characterized in that: the operation of the auxiliary display system comprises the following steps:

s1, when the automobile is backed, the information of the obstacles at the blind area, such as distance, direction and the like, is detected in an omnibearing manner through the annular camera shooting unit and the ultrasonic detection unit;

s2, converting the detected information into an image easy to view by the image processing module;

s3, the information processing module processes and judges the collected various information to assist the user to start backing;

s4, when the user needs to obtain more information, the direction and the focal length of the display module can be adjusted through the display adjusting module to obtain a larger visual field range;

s5, the information transmission module transmits the user instruction to the transmission unit, and the transmission unit controls the ring to rotate towards the camera shooting unit to obtain more information;

s6, when dirt exists on the surface of the lens of the annular shooting unit, the cleaning unit can clean the lens;

s7, when the user backs the car, when the car is close to the obstacle in the blind area, the information processing module controls the alarm module to start alarming to remind the user and avoid the collision between the car and the obstacle;

s8, when the automobile is too close to the obstacle in the blind area, the information processing module controls the brake unit to brake emergently, and the user can adjust the direction again to back up the automobile, so that the safety of the user and the automobile is protected;

and S9, repeating S1-S8 to assist the user to complete the reversing successfully.

6. The reversing blind area auxiliary display device for the new energy automobile according to claim 5, characterized in that: the data detection step in step S1 is as follows:

s11, establishing a coordinate system by taking the position of the obstacle as a far point;

s12, passing ultrasonic wavesThe detection unit can display the distance information of the automobile from the obstacle by P_i(X_i，Y_i，Z_i) The spatial coordinates of the automobile relative to the obstacles are shown, wherein i is the number of the obstacles;

s13, shooting the environment of the blind areas around the automobile by the annular shooting unit and transmitting the environment to a user in real time;

through the steps, the user can make proper judgment according to the distance between the environment of the blind area and the barrier, and the user is assisted to back the car.

7. The reversing blind area auxiliary display device for the new energy automobile according to claim 6, characterized in that: the image processing method in the steps S2-S6 is as follows:

and S21, performing gray processing on the acquired image, wherein the gray processing is generally converted according to a weighting method, and the ratio R, G, B is generally 3: 6: 1, the calculation method of the Gray value Gray is as follows:

Gray＝R*0.3+G*0.59+B*0.11

s22, the image processing module carries out filtering processing on the obtained gray-scale image;

s23, calculating the distribution weight of the defects in the image through a Gaussian function, wherein the calculation formula is as follows:

s24, the image processing module judges the obtained weight, when f (x) is less than 0.25, the dirty area of the camera is small, the user is not influenced to back up, the cleaning unit is in a standby state at the moment, waste of water resources is reduced, and the situation that when cleaning is needed, the water source in the cleaning unit is exhausted and cannot be cleaned is avoided; when f (x) is more than 0.25, the surface of the camera is more dirty, and the system controls the cleaning unit to clean the camera so as to avoid influencing backing;

meanwhile, the direction and the focal length of the annular camera shooting unit can be automatically adjusted by the user through the display adjusting module according to the requirement so as to acquire more information, so that the acquired image can better accord with the observation habit of the user and assist the user in backing a car.

8. The reversing blind area auxiliary display device for the new energy automobile according to claim 7, characterized in that: the alarm judgment logic in step S7 is as follows:

s71, setting the reversing speed of the automobile as v and the distance between the automobile and the obstacle as S, wherein the calculation formula is as follows:

s72, setting S_maxFor the maximum braking distance, the calculation formula is as follows:

where t is the wheel spin time, v₀For the final speed of the vehicle, a is the friction coefficient and β is the deceleration, and since the deceleration β varies with the traveling gradient curve of the vehicle, it can be corrected by the following formula:

wherein beta is₀In order to determine the deceleration after the hill correction, Rg is the hill resistance and Rc is the curve resistance, it is possible to determine:

when S is larger than or equal to Smax + Si, the distance between the automobile and the obstacle is longer, the braking distance is longer, and the automobile is safer, wherein Si is the user reaction distance;

when Smax is less than or equal to S and less than or equal to Smax + Si, the distance between the automobile and the obstacle is short, the braking distance is short, and the automobile is dangerous, and the system controls the alarm unit to start alarming to remind a user of safety;

when the beginner used this system, can adjust Si's numerical value for the judgement distance of system increases, can increase the security of system, and help the beginner accomplish the training of backing a car better, makes the beginner learn to drive more fast.

9. The reversing blind area auxiliary display device for the new energy automobile according to claim 8, characterized in that: the braking process of step S8 is as follows:

s81, calculating by the system to obtain S not more than Smax, and indicating that the distance between the automobile and the obstacle is too short, the braking distance is too short, and the user and the automobile are extremely dangerous;

s82, the system controls the brake system to brake emergently, so that the automobile brakes forcibly, and the personal safety of a user is protected;

s83, after the automobile stops, the user manually releases the brake, adjusts the advancing direction and the angle of the automobile, and finishes backing the automobile again under the assistance of the system;

through the steps, the emergency brake under the dangerous condition is realized, and the safety of a user and an automobile is protected.

10. The reversing blind area auxiliary display device for the new energy automobile according to claim 9, characterized in that: the inside of the annular shooting unit is provided with a night vision device, the cleaning unit is connected with an automobile water tank, and the brake unit is detachable.

Technical Field

The invention relates to the technical field of new energy automobiles, in particular to a reversing blind area auxiliary display device for a new energy automobile.

Background

With the rapid development of new energy automobile technology, automobiles are popular among the masses as a rapid and convenient vehicle, and the keeping quantity of the automobiles is continuously increased. Meanwhile, the safety performance of the automobile is also paid more and more attention. Due to the fact that the observation visual field of a driver is limited in the process of backing the automobile, scratches and scratches are often caused during backing the automobile, and even accidents are caused. Even if a left rear-view mirror, a right rear-view mirror and an inside rear-view mirror are added, the observation range is still limited, which brings great challenges to many drivers, especially beginners, at present, many companies and research institutions research the reversing aid, but most of the technical schemes only change the curvature and the reflection angle of the rear-view mirror, such as the double curvature rear-view mirror, but the technical problems of limited reversing vision are not fundamentally solved, automobiles and personnel are still easily injured, and the practicability is poor. Therefore, it is necessary to design a backup blind area auxiliary display device for a new energy automobile, which has strong practicability and protects the personal safety of users.

Disclosure of Invention

The invention aims to provide a reversing blind area auxiliary display device for a new energy automobile, and aims to solve the problems in the background technology.

In order to solve the technical problems, the invention provides the following technical scheme: the utility model provides a new energy automobile is with supplementary display device of blind area that backs a car, includes supplementary display device and supplementary display system, its characterized in that: the auxiliary display device comprises a vehicle body, a front window is arranged on the front side of the vehicle body, side windows are arranged on the side faces of the vehicle body, a rear window is arranged on the rear side of the vehicle body, rear-view mirrors are arranged on two sides of the vehicle body, and the rear-view mirrors are rotatable.

According to the technical scheme, tires are arranged on the periphery of the bottom of the vehicle body, the transmission mechanism is arranged inside the vehicle body, the ultrasonic sensors are arranged on the periphery of the vehicle body, the front-view camera is arranged at the bottom of the front side of the vehicle body, the rear-view camera is arranged at the bottom of the rear side of the vehicle body, the rotating mechanism is arranged at the joint of the front-view camera and the rear-view camera with the vehicle body, and the cleaning mechanism is arranged outside the front-view camera and the rear-view camera.

According to the technical scheme, the auxiliary display system comprises a display module, an integrated control module and a brake module, the display module comprises an annular camera shooting unit, an ultrasonic detection unit and an image processing module, the integrated control module comprises an information processing module, a display adjusting module and a cleaning unit, the display adjusting module comprises an information transmission module and a transmission unit, the brake module comprises an alarm unit and a brake unit, the integrated control module is located inside a vehicle body, the cleaning unit is located inside a cleaning mechanism, and the display module, the integrated control module and the brake module are respectively electrically connected.

According to the technical scheme, the hoop camera unit is used for shooting the environment of human eye blind areas around the automobile, the ultrasonic detection unit is used for detecting obstacles around the automobile, the image processing module is used for converting detected information into an image easy to observe, the information processing module is used for intelligently processing the detected information, the display adjusting module is used for adjusting the display module, the cleaning unit is used for cleaning the display module, the alarm unit is used for giving an alarm when the automobile is close to the obstacles, and the brake unit is used for forcibly braking when the automobile is too close to the obstacles.

According to the above technical solution, the operation of the auxiliary display system comprises the steps of:

s1, when the automobile is backed, the information of the obstacles at the blind area, such as distance, direction and the like, is detected in an omnibearing manner through the annular camera shooting unit and the ultrasonic detection unit;

s2, converting the detected information into an image easy to view by the image processing module;

s3, the information processing module processes and judges the collected various information to assist the user to start backing;

s4, when the user needs to obtain more information, the direction and the focal length of the display module can be adjusted through the display adjusting module to obtain a larger visual field range;

s5, the information transmission module transmits the user instruction to the transmission unit, and the transmission unit controls the ring to rotate towards the camera shooting unit to obtain more information;

s6, when dirt exists on the surface of the lens of the annular shooting unit, the cleaning unit can clean the lens;

s7, when the user backs the car, when the car is close to the obstacle in the blind area, the information processing module controls the alarm module to start alarming to remind the user and avoid the collision between the car and the obstacle;

s8, when the automobile is too close to the obstacle in the blind area, the information processing module controls the brake unit to brake emergently, and the user can adjust the direction again to back up the automobile, so that the safety of the user and the automobile is protected;

and S9, repeating S1-S8 to assist the user to complete the reversing successfully.

According to the above technical solution, the data detection step in step S1 is as follows:

s11, establishing a coordinate system by taking the position of the obstacle as a far point;

s12, the distance information of the automobile from the obstacle can be displayed by the ultrasonic detection unit, and P is used_i(X_i，Y_i，Z_i) The spatial coordinates of the automobile relative to the obstacles are shown, wherein i is the number of the obstacles;

s13, shooting the environment of the blind areas around the automobile by the annular shooting unit and transmitting the environment to a user in real time;

through the steps, the user can make proper judgment according to the distance between the environment of the blind area and the barrier, and the user is assisted to back the car.

According to the above technical solution, the image processing method in the steps S2-S6 is as follows:

and S21, performing gray processing on the acquired image, wherein the gray processing is generally converted according to a weighting method, and the ratio R, G, B is generally 3: 6: 1, the calculation method of the Gray value Gray is as follows:

Gray＝R*0.3+G*0.59+B*0.11

s22, the image processing module carries out filtering processing on the obtained gray-scale image;

s23, calculating the distribution weight of the defects in the image through a Gaussian function, wherein the calculation formula is as follows:

s24, the image processing module judges the obtained weight, when f (x) is less than 0.25, the dirty area of the camera is small, the user is not influenced to back up, the cleaning unit is in a standby state at the moment, waste of water resources is reduced, and the situation that when cleaning is needed, the water source in the cleaning unit is exhausted and cannot be cleaned is avoided; when f (x) is more than 0.25, the surface of the camera is more dirty, and the system controls the cleaning unit to clean the camera so as to avoid influencing backing;

meanwhile, the direction and the focal length of the annular camera shooting unit can be automatically adjusted by the user through the display adjusting module according to the requirement so as to acquire more information, so that the acquired image can better accord with the observation habit of the user and assist the user in backing a car.

According to the above technical solution, the alarm determination logic in step S7 is as follows:

s71, setting the reversing speed of the automobile as v and the distance between the automobile and the obstacle as S, wherein the calculation formula is as follows:

s72, setting S_maxFor the maximum braking distance, the calculation formula is as follows:

where t is the wheel spin time, v₀For the final speed of the vehicle, a is the friction coefficient and β is the deceleration, and since the deceleration β varies with the traveling gradient curve of the vehicle, it can be corrected by the following formula:

wherein beta is₀In order to determine the deceleration after the hill correction, Rg is the hill resistance and Rc is the curve resistance, it is possible to determine:

when S is larger than or equal to Smax + Si, the distance between the automobile and the obstacle is longer, the braking distance is longer, and the automobile is safer, wherein Si is the user reaction distance;

when Smax is less than or equal to S and less than or equal to Smax + Si, the distance between the automobile and the obstacle is short, the braking distance is short, and the automobile is dangerous, and the system controls the alarm unit to start alarming to remind a user of safety;

when the beginner used this system, can adjust Si's numerical value for the judgement distance of system increases, can increase the security of system, and help the beginner accomplish the training of backing a car better, makes the beginner learn to drive more fast.

According to the above technical solution, the braking process of step S8 is as follows:

s81, calculating by the system to obtain S not more than Smax, and indicating that the distance between the automobile and the obstacle is too short, the braking distance is too short, and the user and the automobile are extremely dangerous;

s82, the system controls the brake system to brake emergently, so that the automobile brakes forcibly, and the personal safety of a user is protected;

s83, after the automobile stops, the user manually releases the brake, adjusts the advancing direction and the angle of the automobile, and finishes backing the automobile again under the assistance of the system;

through the steps, the emergency brake under the dangerous condition is realized, and the safety of a user and an automobile is protected.

According to the technical scheme, the night vision device is arranged inside the annular shooting unit, the cleaning unit is connected with the automobile water tank, and the brake unit can be detached and replaced.

Compared with the prior art, the invention has the following beneficial effects: according to the invention, the auxiliary display device and the auxiliary display system are arranged, so that the situation of obstacles around the automobile can be presented to a user in an all-around manner, the user is assisted to back a car, the system can judge according to the image quality, the camera surface is cleaned when more dirt exists on the camera surface, the system can remind the user in real time through measuring and judging the distance between the automobile and the obstacles, and the automobile can be braked emergently when an emergency occurs, so that the safety of the user and the automobile is protected.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic elevation view of the present invention;

FIG. 3 is a schematic view of a display structure of the present invention;

FIG. 4 is a schematic structural diagram of functional modules of the auxiliary display system according to the present invention;

in the figure: 1. a vehicle body; 2. a front window; 3. a side window; 4. a rear window; 5. a rear view mirror; 6. a cleaning mechanism; 7. a tire; 8. an ultrasonic sensor; 9. a forward looking camera; 10. a rearview camera; 11. a rotation mechanism.

Detailed Description

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 only a part of the embodiments of the present invention, and not all of the embodiments. 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.

Referring to fig. 1-4, the present invention provides the following technical solutions: the auxiliary display device comprises an auxiliary display device and an auxiliary display system, wherein the auxiliary display device comprises a vehicle body 1, a front window 2 is arranged on the front side of the vehicle body 1, a side window 3 is arranged on the side surface of the vehicle body 1, a rear window 4 is arranged on the rear side of the vehicle body 1, rear view mirrors 5 are arranged on two sides of the vehicle body 1, the rear view mirrors 5 can rotate, when a user needs to reverse, the environment and obstacles outside the vehicle body 1 can be observed through the front window 2, the side window 3 and the rear window 4 around the vehicle body 1, the rear view mirrors 5 can increase the visual angle of the user through reflection, reduce the blind area of the visual field, and facilitate the user to reverse;

the periphery of the bottom of the vehicle body 1 is provided with tires 7, the interior of the vehicle body 1 is provided with a transmission mechanism, the periphery of the vehicle body 1 is provided with ultrasonic sensors 8, the bottom of the front side of the vehicle body 1 is provided with a front-view camera 9, the bottom of the rear side of the vehicle body 1 is provided with a rear-view camera 10, the joint of the front-view camera 9 and the rear-view camera 10 with the vehicle body 1 is provided with a rotating mechanism 11, the exterior of the front-view camera 9 and the rear-view camera 10 is provided with a cleaning mechanism 6, the front-view camera 9 and the rear-view camera 10 at the bottom of the vehicle body 1 can shoot visual field blind areas which are difficult to be observed by a user and transmit the visual field blind areas to a display screen in the vehicle body 1, so that the user can better observe obstacles, the user can adjust the direction of the cameras through the rotating mechanism 11, increase the observation visual field and reduce the visual field blind areas, and the cleaning mechanism 6 can clean the cameras when the surfaces of the cameras are dirty, the ultrasonic sensors 8 around the vehicle body 1 can probe obstacles around the vehicle body 1 in an all-around dead-angle-free mode and display the distance of the obstacles, so that a user can visually observe the obstacles, the steering of the tires 7 is controlled through the transmission mechanism, and the collision between the vehicle and the obstacles is avoided;

the auxiliary display system comprises a display module, a comprehensive control module and a brake module, wherein the display module comprises a circumferential camera shooting unit, an ultrasonic detection unit and an image processing module, the comprehensive control module comprises an information processing module, a display adjusting module and a cleaning unit, the display adjusting module comprises an information transmission module and a transmission unit, the brake module comprises an alarm unit and a brake unit, the comprehensive control module is positioned in the vehicle body 1, the cleaning unit is positioned in the cleaning mechanism 12, and the display module, the comprehensive control module and the brake module are respectively and electrically connected;

the system comprises an annular camera unit, an ultrasonic detection unit, an image processing module, a display adjusting module, a cleaning unit, an alarm unit and a brake unit, wherein the annular camera unit is used for shooting the environment of human eye blind areas around an automobile, the ultrasonic detection unit is used for detecting obstacles around the automobile, the image processing module is used for converting detected information into an image easy to observe, the information processing module is used for intelligently processing the detected information, the display adjusting module is used for adjusting the display module, the cleaning unit is used for cleaning the display module, the alarm unit is used for giving an alarm when the automobile is close to the obstacles, and the brake unit is used for forcibly braking when the automobile is too close to the obstacles;

the operation of the auxiliary display system comprises the following steps:

s1, when the automobile is backed, the information of the obstacles at the blind area, such as distance, direction and the like, is detected in an omnibearing manner through the annular camera shooting unit and the ultrasonic detection unit;

s2, converting the detected information into an image easy to view by the image processing module;

s3, the information processing module processes and judges the collected various information to assist the user to start backing;

s4, when the user needs to obtain more information, the direction and the focal length of the display module can be adjusted through the display adjusting module to obtain a larger visual field range;

s5, the information transmission module transmits the user instruction to the transmission unit, and the transmission unit controls the ring to rotate towards the camera shooting unit to obtain more information;

s6, when dirt exists on the surface of the lens of the annular shooting unit, the cleaning unit can clean the lens;

s7, when the user backs the car, when the car is close to the obstacle in the blind area, the information processing module controls the alarm module to start alarming to remind the user and avoid the collision between the car and the obstacle;

s8, when the automobile is too close to the obstacle in the blind area, the information processing module controls the brake unit to brake emergently, and the user can adjust the direction again to back up the automobile, so that the safety of the user and the automobile is protected;

s9, repeating S1-S8 to assist the user to complete the backing up successfully;

the data detection step in step S1 is as follows:

s11, establishing a coordinate system by taking the position of the obstacle as a far point;

s12, the distance information of the automobile from the obstacle can be displayed by the ultrasonic detection unit, and P is used_i(X_i，Y_i，Z_i) The spatial coordinates of the automobile relative to the obstacles are shown, wherein i is the number of the obstacles;

s13, shooting the environment of the blind areas around the automobile by the annular shooting unit and transmitting the environment to a user in real time;

through the steps, the user can make proper judgment according to the distance between the environment at the blind area and the barrier, so that the user is assisted to back the car;

the image processing method in steps S2-S6 is as follows:

and S21, performing gray processing on the acquired image, wherein the gray processing is generally converted according to a weighting method, and the ratio R, G, B is generally 3: 6: 1, the calculation method of the Gray value Gray is as follows:

Gray＝R*0.3+G*0.59+B*0.11

s22, the image processing module carries out filtering processing on the obtained gray-scale image;

s23, calculating the distribution weight of the defects in the image through a Gaussian function, wherein the calculation formula is as follows:

s24, the image processing module judges the obtained weight, when f (x) is less than 0.25, the dirty area of the camera is small, the user is not influenced to back up, the cleaning unit is in a standby state at the moment, waste of water resources is reduced, and the situation that when cleaning is needed, the water source in the cleaning unit is exhausted and cannot be cleaned is avoided; when f (x) is more than 0.25, the surface of the camera is more dirty, and the system controls the cleaning unit to clean the camera so as to avoid influencing backing;

meanwhile, the direction and the focal length of the annular camera shooting unit can be automatically adjusted by a user through the display adjusting module according to the requirement so as to acquire more information, so that the acquired image is more in line with the observation habit of the user, and the user is assisted to back up;

the alarm determination logic in step S7 is as follows:

s71, setting the reversing speed of the automobile as v and the distance between the automobile and the obstacle as S, wherein the calculation formula is as follows:

s72, setting S_maxFor the maximum braking distance, the calculation formula is as follows:

where t is the wheel spin time, v₀For the final speed of the vehicle, a is the friction coefficient and β is the deceleration, and since the deceleration β varies with the traveling gradient curve of the vehicle, it can be corrected by the following formula:

wherein beta is₀In order to determine the deceleration after the hill correction, Rg is the hill resistance and Rc is the curve resistance, it is possible to determine:

when S is larger than or equal to Smax + Si, the distance between the automobile and the obstacle is longer, the braking distance is longer, and the automobile is safer, wherein Si is the user reaction distance;

when Smax is less than or equal to S and less than or equal to Smax + Si, the distance between the automobile and the obstacle is short, the braking distance is short, and the automobile is dangerous, and the system controls the alarm unit to start alarming to remind a user of safety;

when the beginner uses the system, the numerical value of Si can be adjusted, so that the judgment distance of the system is increased, the safety of the system can be improved, the beginner can be helped to complete the back-up training better, and the beginner can learn to drive the vehicle more quickly;

the braking process of step S8 is as follows:

s81, calculating by the system to obtain S not more than Smax, and indicating that the distance between the automobile and the obstacle is too short, the braking distance is too short, and the user and the automobile are extremely dangerous;

s82, the system controls the brake system to brake emergently, so that the automobile brakes forcibly, and the personal safety of a user is protected;

s83, after the automobile stops, the user manually releases the brake, adjusts the advancing direction and the angle of the automobile, and finishes backing the automobile again under the assistance of the system;

through the steps, the emergency brake under the dangerous condition is realized, and the safety of a user and an automobile is protected;

the inside of ring direction unit of making a video recording is provided with the night-time vision device, and clean unit is connected with radiator, and brake unit can dismantle the change, and the night-time vision device can guarantee that the system also can normal use night, and radiator can collect the rainwater, and clean unit is connected with the water tank and can reduces water waste, and brake unit probably has the potential safety hazard after using a period, dismantles the security that changes the increase system through the change.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.