Shulou(Shulou.com)06/03 Report--

With the accelerated development of urbanization in China, the population is more and more concentrated, urban traffic extends in all directions, and the number of vehicles is also increasing year by year. Bus is not only an important part of urban transportation, but also a necessary means of transportation for urban commuter. However, the increasingly congested traffic situation brings a lot of trouble to the drivers of large vehicles, such as bus rear-end collision, reversing blind areas, narrow roads and so on.

For a long time, in order to solve these problems, there are many related technologies, such as voice prompt, reversing radar system, visual radar system, reversing image, 2D 360 °look technology. Until now, the 3D 360 °look technology has been used on buses.

Brief introduction of 3D 360 °panoramic Image system

Panoramic image system is also called 360 °panoramic image system, or MVCS (MulTI-View Camera System). By setting up four to eight wide-angle cameras around the car, it can fully cover all the field of view around the vehicle. The images at the same time before and after the vehicle are collected, and then after video synthesis, visual angle conversion, image mosaic and enhancement, the collected data are converted into a 360-degree top view of the car body, which is displayed on the screen of the central console, which improves the safety and convenience of driving.

I. bus application

Through the display of the center console, the driver can clearly understand the environment around the parking front, left turn signal, right turn signal, reversing, middle door, and the ruler line can accurately read the position and distance of the obstruction. reduce vehicle rear-end collision, reversing blind spots, narrow road traffic and so on.

II. Trailer application

The trailer is generally composed of the main car and the trailer, the main car is responsible for the traction, and the trailer is responsible for the bearing function, which is connected by the traction bridge. When the vehicle turns, the angle between the main car and the trailer can reach more than 90 °. Compared with buses, the body of trailers is longer, and the towing between vehicles is non-rigid, which makes trailers more prone to traffic accidents in turning, reversing and other driving. Therefore, as the representative of large freight vehicles, trailers need the support of 360 °panoramic image technology.

As shown in the following figure, the trailer changes with the curve and the speed of the vehicle, the curve is the trajectory of the moving vehicle, and orange is the track of the entire trailer. The orange area is a dead crescent blind area, which can easily lead to accidents, while the rear part of the right side of the vehicle is also completely blind. In the past, drivers usually used a variety of ways to repeatedly observe the complex blind area outside the car to estimate the driving area of the trailer, so as to control the tractor.

However, through the 360 look technology, it is very convenient to provide the driver with the information around the vehicle. Through the cameras distributed around the main vehicle and the trailer, together with the radar system and sensor system, the imaging of each camera can be adjusted dynamically. It plays a very important auxiliary role to the driver in the scene of turning and reversing.

In the panoramic view, by drawing the track line, detecting and predicting the area in the track, real-time and dynamic feedback to the driver, the difficulty of driver control is reduced, and the driver can control the vehicle parking more calmly or pass through the complex road surface. Effectively reduce the occurrence of scratches, collisions, falls and other accidents.

3. 360 °look solution with high stability

It can be realized by I.MX6Q processor and multi-channel analog-to-digital converter chip. Among them, the core processor adopts FETMX6Q-C core board, the multi-channel analog conversion chip adopts TW6868 chip with 1 to 4 cameras, Android operating system, and vehicle technology such as reversing radar to realize the ADAS function of 360 °panoramic view: 2D panoramic, 3D panoramic, lane departure alarm, blind area alarm, driving record, dynamic reversing track, blind area detection system.

Among them, the FETMX6Q-C core board is designed for Feiling i.MX6Quad high-performance processor based on NXP quad-core ARM Cortex-A9 architecture, the main frequency is 1GHz, and the board size is only 40mm, 70mm, and 12-layer PCB gold deposition process. Using four ultra-thin connectors with a height of 1.5mm, the number of pins is up to 320PIN, leading out all the functional pins of the processor, which can also meet the different functional requirements of different products in different fields.

At the same time, it provides a supporting backplane with rich interfaces, which not only carries mainstream interfaces such as Gigabit Ethernet, CAN-bus, camera, WIFI& Bluetooth, but also leads to the unique functions of CPU, such as MIPI, MLB, EIM BUS, etc. It can help engineers easily achieve pre-evaluation, testing and development, and design more competitive products more quickly.

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