Currently, when trees are cut down on an industrial scale (what the expert calls "tree harvesting"), heavy wheeled or tracked vehicles are employed which were often designed for field work or building sites, and weigh up to 55 tons when loaded.
As a consequence, large areas of forest floor are destroyed, and its regeneration can last many decades. Instead of improving these systems, the mechanical engineer Christian Knobloch has invented a new movement concept from scratch by applying constructional-geometrical optimisation methods.
His "striding harvester", weighing only 7.5 tons, combines a number of valuable advantages. Like a horse's hoof, it presses down on the soil selectively, and as a result, the soil can recover much faster than it could after being heavily disturbed by conventional forestry machines. In addition, the patented concept allows for stepping over ditches and other obstacles of up to 4.6 metres wide. Marshy ground and inclines as steep as 36% are no problem for the futuristic strider.
How does this form of movement actually work? "This new striding movement has no prototype in nature", explains Christian Knobloch. "The payload moves on a kind of bridge with three cantilevered feet on each end that are able to adapt to the ground surface. After each step, a new direction can be chosen, whereby the bridge moves forwards or backwards in the stepping direction. The payload carried by the mechanism consists of a cabin, traction technology, and a telescopic crane. The payload always bears down on one of the two 'legs' or bases, which enables the unloaded base to pivot around it in a space-saving way."
The new kind of movement offers many benefits. Apart from its unequalled "step" of 8 metres, the "striding harvester" can reach trees at a distance of 10 metres within a working area of 480 square metres. The splayed out cantilevered feet provide a large platform that enables the crane to lift heavy weights in spite of the relatively light weight of the machine. All the critical areas related to the striding mechanism were analysed in detail by the creative industrial designer in his diploma thesis, which was supervised by Dr. Günter Kranke (Centre for Industrial Design, TU Dresden), and evaluated according to statics criteria.
As a by-product of the work, which deals primarily with tree harvesting, Knobloch, in collaboration with Prof. Jörn Erler, developed an idea about a simple, inexpensive and soil-friendly way of transporting felled trees. This means of transport would ideally complement the stepping machine concept, and would make the purchase of a "striding harvester" even more attractive to forest owners. Christian Knobloch discloses that potential industrial partners are already queuing up at his doorstep. The concept of constructing a "friendly, industrious, agile, and robust machine", which is much more attuned to work in the forest than any chunky tracked vehicle, has obviously worked out.
At the third "Industrial Design" symposium, to take place in the historic buildings of the Deutsche Werkstätten Hellerau on the 17th and 18th of April 2009, Christian Knobloch is to be presented with the "Rudi Högner Advancement Award for Industrial Design" for his diploma thesis.Information for journalists:
"We're hoping for up to 600 kilometers per hour"
15.06.2018 | Technische Universität München
Flow probes from the 3D printer
25.05.2018 | Technische Universität München
In a recent publication in the renowned journal Optica, scientists of Leibniz-Institute of Photonic Technology (Leibniz IPHT) in Jena showed that they can accurately control the optical properties of liquid-core fiber lasers and therefore their spectral band width by temperature and pressure tuning.
Already last year, the researchers provided experimental proof of a new dynamic of hybrid solitons– temporally and spectrally stationary light waves resulting...
Scientists from the University of Freiburg and the University of Basel identified a master regulator for bone regeneration. Prasad Shastri, Professor of...
Moving into its fourth decade, AchemAsia is setting out for new horizons: The International Expo and Innovation Forum for Sustainable Chemical Production will take place from 21-23 May 2019 in Shanghai, China. With an updated event profile, the eleventh edition focusses on topics that are especially relevant for the Chinese process industry, putting a strong emphasis on sustainability and innovation.
Founded in 1989 as a spin-off of ACHEMA to cater to the needs of China’s then developing industry, AchemAsia has since grown into a platform where the latest...
The BMBF-funded OWICELLS project was successfully completed with a final presentation at the BMW plant in Munich. The presentation demonstrated a Li-Fi communication with a mobile robot, while the robot carried out usual production processes (welding, moving and testing parts) in a 5x5m² production cell. The robust, optical wireless transmission is based on spatial diversity; in other words, data is sent and received simultaneously by several LEDs and several photodiodes. The system can transmit data at more than 100 Mbit/s and five milliseconds latency.
Modern production technologies in the automobile industry must become more flexible in order to fulfil individual customer requirements.
An international team of scientists has discovered a new way to transfer image information through multimodal fibers with almost no distortion - even if the fiber is bent. The results of the study, to which scientist from the Leibniz-Institute of Photonic Technology Jena (Leibniz IPHT) contributed, were published on 6thJune in the highly-cited journal Physical Review Letters.
Endoscopes allow doctors to see into a patient’s body like through a keyhole. Typically, the images are transmitted via a bundle of several hundreds of optical...
13.06.2018 | Event News
08.06.2018 | Event News
05.06.2018 | Event News
20.06.2018 | Materials Sciences
20.06.2018 | Information Technology
20.06.2018 | Information Technology