The principle and explanation of 3D LiDAR / YVT series

What is LiDAR？

LIDAR is an abbreviation for Light Detection and Ranging, and generally refers to a device that measures the distance to a detected object while scanning light, and the measured data is used for applications such as collision prevention and automatic driving.

2D LiDAR and 3D LiDAR

2D LiDAR acquires two-dimensional distance information by rotating it with a motor and scanning the light in the horizontal direction.
In addition, 3D LiDAR acquires information in the height direction by installing multiple light sources vertically, adding vertical scanning with mirrors, and using various technologies to bend light.

In planar environments such as typical factories, warehouses, and office environments in buildings, 2D LiDAR is preferred because less height data is required and less distance information is required for processing. 3D LIDAR is required for outdoor driving because 3D measurement is required due to curbs and slopes on the road surface.

Principle of 3D LiDAR YVT series

YVT series adopts a method called mechanical scanning.It realized 3-dimensional detection by scanning the plane with a motor and by moving the mirror up and down to scan 210 degrees horizontally, 40 degrees vertically.

Scanning and resolution point clouds

YVT is projection scanning that combines horizontal scanning by a motor and vertical scanning by a mirror. The horizontal direction scans 105° or more left and right from the front, totaling 210° or more, and the vertical direction scans 40° back and forth.

The number of resolution points is 2590 points per round, and it is possible to further increase the number of point clouds by using the interlace function.

Interlace function

There is a function called interlace that improves resolution by intentionally shifting the scanning position. For example, when measuring with 4 interlaces, by shifting the scanning position by 4 rounds and overlapping the data for these 4 rounds, it is possible to obtain data with 4 times the resolution.