Article/Teng Sanmao
Product of Che Tuteng, please indicate the source when reprinting
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It can be foreseen that, Intelligent autonomous driving will become one of the directions of automobile development.
Currently, semi-automatic/autonomous driving assistance systems - Tesla Autopilot system, Volvo City Safety system (City?Safety), Mercedes-Benz preventive safety system (PRE-SAFE?PLUS), BMW driving assistance system (Driver Assist), Toyota Safety Sense, Subaru Eyesight driving assistance system, etc., are becoming increasingly familiar to people.
A research report by the Boston Consulting Group in the United States predicts that by 2035, there will be 18 million cars worldwide with some or all smart car functions, including 12 million driverless cars, and China will become the largest market.
The smart car industry is now in a period of rapid development. Domestic and foreign car companies and Internet giants are all investing in the passenger car market. With the continuous improvement of advanced assisted driving systems ADAS and the support of Internet of Vehicles technology, there is no need to The mass production of self-driving cars has been put on the agenda.
To realize autonomous driving of cars, "perception of objects and objects" is the core underlying technology. That is to say, engineers must first solve the problem of making the car "visible/hearable", so " "Radar" and "image recognition" systems have become the key to breakthroughs.
▍What are the automotive radars?
At present, the most critical component of the automobile anti-collision safety system is the sensor part. The mainstream vehicle radars mainly include ultrasonic radar, lidar and millimeter wave radar.
Among them, ultrasonic radar has low cost and relatively short detection range, and is mainly used in car reversing and collision avoidance systems. LiDAR has high cost, long detection range, and high accuracy, but is easily affected by rain, snow, fog, smoke, etc. It is mainly used for roof sensing during automatic driving of cars.
(Rooftop lidar)
In comparison, millimeter-wave radar has moderate cost, long detection range, high resolution, and is not affected by rain, snow, fog, etc. , used in automotive ADAS advanced driving assistance systems, ACC adaptive cruise, AEB emergency braking systems, etc.
For example, in engineering practice, currently the most common vehicle-mounted millimeter wave radar is the planar antenna array radar. Most of these radars have two or three sets of transmitting antennas, which are respectively responsible for detecting close and far distances. distance target. However, there is still room for improvement in irradiating a wide area.
▍How powerful is 4D imaging radar?
In fact, the radar technology currently on the market cannot meet the high requirements of resolution and field of view at the same time, and has to choose between medium-resolution imaging with a limited field of view and low-resolution imaging with a wide field of view. .
In contrast, this low-cost, high-resolution 4D radar sensor from Israel can generate a 3D position and speed map of objects around the car in real time, and can detect cars 500 meters away and 200 meters away. For pedestrians meters away, the angular resolution is greater than 1 degree, and the positioning is more extremely 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 into automotive radar. Equipped with the latest fighter phased array radar technology, the vehicle's detection capabilities can be imagined. It is not impossible to detect objects the size of beans within 80 meters.
In terms of its principle, unlike many traditional radars, RFISee's patented 4D imaging radar uses a powerful focused beam of patented phased array radar technology. The focused beam generated by dozens of transmitters can quickly scan the field of view. , and the receiver ensures that the radar image is greatly improved with a better signal-to-noise ratio. Compared with existing radars, the detection range of obstacles such as cars and pedestrians is six times wider.
What’s even more rare is that with such advanced technology, the price must not be cheap, right? In fact, this is not the case. The Israeli company has lowered its price to the level of current mainstream automotive radar sensors. Currently, its radar prototype products are being evaluated by top automotive OEMs and Tier 1 suppliers.
With the urgent demand for autonomous vehicles, the automotive radar sensor market is expected to grow rapidly in the next few years. According to industry research organization Yole? Research, the market value of the global automotive radar market will reach US$8.6 billion by 2025, with a compound annual growth rate of approximately 16% from 2015 to 2025. 4D imaging radars with military-grade technology have great prospects. considerable.
This article comes from the author of Autohome Chejiahao and does not represent the views and positions of Autohome.