The autonomous outdoor navigation technology developed at Fraunhofer IPA in Stuttgart, Germany, can cope with all challenges for outdoor navigation and allows agricultural robots to be used, for example, for mechanical weed control.
In addition to software development, the research group is creating agricultural robot prototypes known as ‘CURT’. Two of these robots will be on show at the Agritechnica trade fair stand of IPA, giving visitors an insight of how it all works.
The first, CURTdiff, has the ability to autonomously recognize rows of crops between artificially raised ridges, as is common practice in potato and asparagus cultivation, and manoeuver along them fully autonomously.
The second, CURTmini, which is the smallest robot representative, will move across an area featuring floor modules that offer different levels of maneuverability, e.g., grass, wood and gravel. Depending on the calculated level of traversibility, the robot accordingly adapts to the situation to independently plan a path that avoids obstacles. Thanks to interchangeable floor modules, the course is interactive.
Adaptive path planning capability
Trade fair visitors will also have an opportunity to change the floor modules to see the robot’s adaptive path planning capability for themselves. In addition, visitors can place obstacles in the way of the robots to see how the robot dynamically recalculates its path. Furthermore, screens will be installed at the trade fair stand playing videos to highlight potential application areas such as winemaking and apple cultivation.
The exhibits organized by the Fraunhofer IPA development team are particularly geared towards manufacturers and users of agricultural machinery. However, the navigation software is of interest for a range of other autonomous machinery used both indoors and outdoors. The CURTmini is also available for purchase as a research platform.
Obstacles for outdoor areas
Outdoor areas feature a variety of potential obstacles, all of which must be interpreted. For example, tall grass is flexible and can be driven through or over. However, the presence of a baby deer should by no means be overlooked, no matter how deeply it might be nestled in the grass. The subsoils themselves can also be very different and have varying levels of traversilibity. And depending on the weather, visibility might be limited. This can reduce the quantity and quality of sensor data collected.
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