Laserscanners are laser-based range-finding devices. They create a range image of the environment. Unlike their smaller brothers, the fixed-beam lasers, they do not measure one direction (1d), but create a range profile of the surrounding. Their performance, such as the scan angle, angular resolution, range and accuracy all vary greatly from scanner to scanner. The Laserscanners available today which are suitable for automotive use are typically 2d scanners. They have only one scan plane in which they detect obstacles. Although this is sufficient for a range of applications, a 3d view with multiple scan planes will enhance most applications and add extra safety to the results of the sensors. The information from extra scan planes becomes especially valuable if the vehicle on which the Laserscanner is mounted is pitching. Classic single-plane Laserscanners are currently used in a range of applications around either automatic vehicles or driver assistance functions. Their big field of vision and excellent measurement accuracy make them well suited for precise measurement tasks. However, adding some extra scan planes by deflecting parts of the single scan plane can greatly increase the flexibility of the scanner, either adding extra safety to the object tracking or allowing the operation under extreme conditions. However, these modifications are only the first step on the way to true multi-line Laserscanners. The MOTIV prototype has proven the capabilities of such a Laserscanner. Currently, the next generation of multi-line Laserscanners is under development in several projects supported by the European Commission, some of which will be presented at this conference.
Abstract