Process for preparing an area plan having a cellular structure and comprising a unit moving automatically and positioned in said area using sensors based on wave reflection

US6205380A · kind A · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Rudolf Bauer · Hallerndorf, DE
• Uwe Wienkop · Munich, DE

Key dates

• Filing date: Dec 18, 1998
• Grant date: Mar 20, 2001
• Expiry date: Dec 18, 2018

Classification

• Technology area (CPC G): Physics
• CPC primary: G05D1/0274
• WIPO field: Control
• WIPO sector: Instruments

Abstract

The entry and the deletion of the degree of occupancy values in cellularly structured environment maps of autonomous mobile units is improved with the method. Dependent on the measuring directions of ultrasound sensors, different sectors in which the degrees of occupancy value are separately incremented are defined for each cell of the cellularly structured environment map. This has the advantage that an obstacle measured by different sensors only leads to an incrementation or a de-incrementation of the occupancy degree of a respective cell when this measurement ensued from the same measuring direction with respect to the cellularly structured environment map. Dynamic objects in the measurement area of the autonomous mobile unit can thus be more quickly deleted from the map and timeout measurements that have arisen due to reflections of echos do not lead to really existing objects being deleted from the map.