Who can use lidar in cars? He Wei said: “The laser pointer radar uses wide-angle reception, and in order to achieve large-angle scanning, the 2D MEMS micro-mirror operates in a resonant state, operates according to the Lisaru scanning method, uses a single-point transmission, and the array receives the detection distance. The axis array uses line scanning. The line is hit on the galvanometer through a single point. The galvanometer scans in one direction and the optical demonstration component is used in the other direction. Then the single point is expanded into a line to achieve a line scan in space. APD is used at the receiving end. For example, there are now 64-line APDs, and each APD will be imaged to implement 64-line lidar. In contrast, 2D is more easy to connect with traditional solutions, which are single-point transmission and reception, and line scanning. The optical requirements for reception are relatively high, but the single-axis reliability is higher than the dual-axis, and it is easier to pass vehicle certification. For example, the frequency of our first single-axis solution is 1.2KHz, mainly considering that vehicle regulations require 2KHz random vibration test, electrostatically driven MEMS micro-mirror working frequency must reach twice 2.4KHz to cause resonance. Of course, the size of this single-axis scanning module is only one thumb Joint slightly larger viewing angle can reach similar products in larger 80 degrees. ”
It is not difficult to find that although the laser pointer radar currently has a large number of expensive and difficult application problems in self-driving cars, the openness of the algorithm to reduce repetitive development will undoubtedly promote the price reduction. In addition, thanks to the integration of MEMS technology The high advantage solves the problem of large size and can also help reduce costs. Therefore, MEMS lidar has become the target of many manufacturers. We have reason to believe that with more and more manufacturers joining the lidar market and the mass production and application of single-axis MEMS lidar, lidar can also be used in large-scale applications in autonomous vehicles in the near future, helping cars achieve more High-level autonomous driving promotes the development of automatic artificial intelligence to strong artificial intelligence.