In terms of type, lidar can be divided into mechanical lidar and solid-state lidar. Mechanical lidar has the invisibility to control the emission angle of the green laser pointer, while solid-state ones rely on electronic components to control the laser emission angle. Compared with the traditional mechanical type, the solid-state radar has a larger scanning range, faster response speed, and effective cost control. It has become inevitable to become the mainstream.
In terms of the number of internal wire harnesses, lidar can be divided into single wire beam and multi wire beam lidars. Traditional single wire beam radar scans generate only one scan line at a time, so they generate plane information. Even so, single-beam radar has a wide range of applications due to its faster measurement speed, such as terrain mapping.
However, the traditional single-beam radar has a very small scanning angle of view, and it is certainly not applicable to autonomous driving models. So how to solve this problem, increasing the wiring harness is the simplest and most direct way. The more the wiring harness, the wider the detection range and the more accurate the data. Therefore, the current lidar products on the market include 4 wire harnesses, 8 wire harnesses, 16 wire harnesses, 32 wire harnesses, and 64 wire harnesses. Of course, over time, the more abnormal 128 wire harness lidar has also appeared.
Lidar and millimeter-wave radar can be described as being in love with each other. In view of the fact that lidar cannot work under rain, snow, and fog, this millimeter wave can effectively make up for it, and its directivity is also better. The accuracy of judging distance objects is inferior to millimeter wave. For example, for objects several hundred meters away, millimeter wave radar may only detect that it is an obstacle, but the specific object is beyond its working range.