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It can be predicted that intelligent autonomous driving will become one of the directions of automobile development.
At present, semi-automatic/automatic driver assistance systems-Tesla Autopilot system, Volvo City Safety System (City? Safety), Mercedes-Benz preventive safety system (pre-safety? PLUS), BMW driver assistance system (driver? Auxiliary), Toyota Zhixing Safety System (Toyota? Safe? Sense), Subaru Eyesight driver assistance system, etc. , more and more familiar.
According to the research report of the Boston Consulting Group, before 2035, there will be 654.38+08 million cars in the world with some or all smart car functions, including 654.38+02 million driverless cars, and China will become the largest market.
The smart car industry is now in a period of rapid development, and domestic and foreign car companies and Internet giants have laid out the passenger car market. With the continuous improvement of advanced driver assistance system ADAS and the support of vehicle networking technology, mass production of driverless cars has been put on the agenda.
In order to realize automatic driving, "perception of things and things" is the core underlying technology, that is, engineers must first solve the problem of making cars "visible/audible", so "radar" and "image recognition" systems have become the key to breakthrough.
What are there in automotive radar?
At present, the sensor is the most critical component in the automobile anti-collision safety system. The mainstream vehicle-mounted radars mainly include ultrasonic radar, laser radar and millimeter wave radar.
Among them, ultrasonic radar has low cost and relatively short detection distance, and is mainly used in automobile reversing anti-collision system. Lidar has high cost, long detection distance and high accuracy, and is easily affected by rain, snow, fog, smoke and dust. It is mainly used for sensing the roof of the car when it is driving automatically.
(Rooftop Lidar)
Comparatively speaking, millimeter-wave radar has moderate cost, long detection distance and high resolution, and is not affected by weather such as rain, snow and fog. It is used in ADAS advanced driver assistance system, ACC adaptive cruise and AEB emergency braking system.
For example, in engineering practice, the plane antenna array radar is common in vehicle-mounted millimeter wave radar at present. Most of these radars have two or three groups of transmitting antennas, which are responsible for detecting short-range and long-range targets respectively. However, there is still room for improvement in the large area of irradiation.
How strong is the 4D imaging radar?
In fact, the radar technology on the market can't meet the high requirements of resolution and field of view at the same time, so we have to choose between medium resolution imaging with limited field of view and low resolution imaging with wide field of view.
In contrast, Israel's low-cost, high-resolution 4D radar sensor can generate 3D position and speed maps of objects around cars in real time, and can detect cars 500 meters away and pedestrians 200 meters away. The angular resolution is greater than 1 degree, and the positioning is more accurate.
This is because the engineers of this RFISee company applied the phased array antenna technology originally developed for the fifth-generation fighter F-35 and the "Iron Dome" missile defense system to automotive radar, so that the vehicle has the latest fighter phased array radar technology, and the detection capability can be imagined. It is not impossible to detect an object the size of a bean within 80 meters.
The principle is different from many traditional radars. RFISee's patented 4D imaging radar uses the powerful focused beam of patented phased array radar technology. The focused beams generated by dozens of transmitters can quickly scan the field of view, and the receiver ensures that the radar image is greatly improved and has a better signal-to-noise ratio. Compared with the existing radar, the detection range of obstacles such as cars and pedestrians is 6 times wider.
What is even more rare is that the technology is so advanced that the price must not be cheap, right? In fact, Israeli companies have reduced their prices to the level of current mainstream automotive radar sensors. At present, its radar prototype products are being evaluated by top automobile OEMs and first-class suppliers.
With the urgent demand for self-driving cars, the sensor market in automotive radar is expected to grow rapidly in the next few years. According to Yole, an industrial research institute? It is predicted that by 2025, the global market value of automotive radar will reach 8.6 billion US dollars, and the compound annual growth rate from 2065,438+05 to 2025 will be about 65,438+06%. The prospect of military-grade 4D imaging radar is very promising.
This article comes from car home, the author of the car manufacturer, and does not represent car home's position.