LIDAR is "evolved" by Radar. In fact, both technologies are for the purpose of detecting and measuring distance. However, the methods used by the two are quite different. Radar is based on radio-radio wave emission and reflected back to the transmitting device. The transmitting device receives the distance calculated by the obstacle. We will not repeat the Doppler effect and emission here. The power of the machine and other issues; Radar used in the vehicle itself is a close-range millimeter wave radar, which is widely used due to its low price and excellent "close" working ability.
Lidar works by detecting, reflecting and receiving infrared light beams that are harmless to humans and animals. Objects that can be detected: the distance between a specific object and the car during day or night. Even with different degrees of reflection, the lane line and the road surface can be distinguished. The entity behind the detected object cannot be imaged and is easily understood in conjunction with the following lidar imaging map.
Mechanical 360-degree lidar imaging is not only expensive, it involves mechanical rotation, so its volume can not be reduced; ensuring omnidirectional scanning is an important means for ADAS to use LIDAR for long-distance object recognition and distance determination. Therefore, there is a “family barrel†on the auto-driving vehicles in the current L3 class.
Don't underestimate this "barrel", it is more expensive than the average car, about 70-80,000 US dollars. If it is added, it can solve all the problems of ADAS, but it is still very gratifying, but on the technical level, it can only solve part of the problem, and it is expensive and bulky. So laser radar startup Quanergy Systems has announced that it is the world's first solid-state lidar sensor, and said that if the order quantity is 10,000 units, the cost of each laser radar is expected to be under $100. The difference is as follows
The author also expects the mass production of the solid-state LIDAR. After all, this is the first technical industrialization barrier for all people to enter the driverless.
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