Lidar is like the human eye. It is a sensor that can detect the precise position of an object. It mainly emits a laser signal to the target, calculates the distance based on the time difference of the signal reflected from the object, and then emits the laser angle. To determine the angle between the object and the transmitter, and get the relative position of the object and the transmitter, what are the important functions of lidar? Let's take a look together!
In the field of robotics, lidar has become the core sensor of mobile robots due to its good directivity and high focus. It is also the most stable and reliable positioning technology at present. For mobile robots, lidar is equivalent to its "eyes". It acquires lattice data in two-dimensional space through continuous scanning. With SLAM technology, it can help robots achieve autonomous positioning, map construction, and path planning functions. Take the sweeping robot as an example, using lidar and SLAM algorithm to enable the sweeping robot to realize intelligent cleaning in the room. During the cleaning process, the map can be drawn in real time and transmitted to the mobile phone software. Even if you are not at home, you can view the cleaning on your mobile phone. Situation, and arrange cleaning of other areas.
In addition to its use in mobile robots, the role of lidar in the field of unmanned driving is also important, but it is different from the field of robotics: multi-line lidar is mainly used in unmanned driving to help vehicles perceive the road environment autonomously , Automatically plan the driving route and control the vehicle to reach the predetermined goal. Using time-of-flight technology, the relative distance between the target and itself is calculated according to the turn-back time of the laser after encountering an obstacle. The laser beam can accurately measure the relative distance between the contour edge of the object in the field of view and the device. This contour information forms a so-called point cloud and draws a 3D environment map with an accuracy of centimeters, thereby improving the measurement accuracy.
Of course, in addition to distance measurement, lidar can also enable any developing medium or surface to achieve multi-point interactive functions, such as walls, floors, desktops, and irregular flat objects to achieve contact touch, even on non-planar or water surfaces. Non-contact interactive operation.
These are all multi-touch applications based on Xinda Technology’s lidar. The main principle is to project infrared rays onto the screen through an infrared laser device. When the screen is blocked, the infrared rays will reflect and the camera under the screen will capture Reflect the whereabouts, and then through the system analysis, you can respond.
