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| Hameed, I.A.; Bochtis, D.D.; Sørensen, C.G; Nørremark, M.. |
| A number of advanced satellite positioning based systems for agricultural machines have been developed and are commercial available for aiding and supporting navigation efforts up to full auto-steering. Furthermore, in terms of the route planning for agricultural field operations, advanced methods based on combinatorial optimisation of fieldwork patterns have recently been introduced. In order to apply and implement these methods in the high-level control system of agricultural machines, an appropriate representation of the field as a geometrical entity made up of discrete geometric primitives, such as points, lines, and polygons is needed. Preferably, such a representation must be generated in real-time providing the input to the whole accuracy range... |
| Tipo: Journal paper |
Palavras-chave: Weed management. |
| Ano: 2010 |
URL: http://orgprints.org/20655/4/20655.pdf |
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| Sørensen, C.G.; Jørgensen, R.N.; Maagaard, J.; Bertelsen, K.K.; Dalgaard, L.; Nørremark, M.. |
| Current service robots have relatively primitive behaviours and limited interaction with the environment. Technological foresights have indicated that the next generation of service robots will demonstrate a high degree of autonomy and reliability, have minimal impact on the environment, and will interact in a flexible way with the user. It is necessary therefore, to determine the functional requirements for a future energy-efficient robotic bioproduction system from the perspective of various stakeholders, together with the development of a high-level framework for designing and prototyping the common functionalities of mobile robots. This study presents technical guidelines for the design of a plant nursing robot. The methodology uses Quality Function... |
| Tipo: Journal paper |
Palavras-chave: Weed management. |
| Ano: 2010 |
URL: http://orgprints.org/20657/4/20657.pdf |
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| Melander, B.; Kristensen, J.K.; Kristensen, K.; Mathiassen, S.K.; Nørremark, M.; Kristensen , E.F.. |
| Traditional strategies for controlling Elytrigia repens infestations in organic cropping in Scandinavia are based on repeated post-harvest cultivation. However, post-harvest tillage is undesirable due to the need for retaining nutrients in the cropping systems. There is a need to look for solutions where E. repens can be controlled over a short duration to allow replanting of the soil. A Danish project is investigating new technologies that can meet such requirements. One aspect is to look for methods that physically can destruct the sprouting ability of E. repens rhizome buds. We investigated the effect of heating using hot water and mechanical crushing by pressure on the sprouting ability of exposed rhizome buds. The effect of temperatures <... |
| Tipo: Journal paper |
Palavras-chave: Weed management. |
| Ano: 2011 |
URL: http://orgprints.org/20606/1/20606a.pdf |
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| Melander, B.; Kristensen, J.K.; Kristensen, K.; Mathiassen, S.K.; Nørremark, M.; Kristensen , E.F.. |
| Traditional strategies for controlling Elytrigia repens infestations in organic cropping in Scandinavia are based on repeated post-harvest cultivation. However, post-harvest tillage is undesirable due to the need for retaining nutrients in the cropping systems. There is a need to look for solutions where E. repens can be controlled over a short duration to allow replanting of the soil. A Danish project is investigating new technologies that can meet such requirements. One aspect is to look for methods that physically can destruct the sprouting ability of E. repens rhizome buds. We investigated the effect of heating using hot water and mechanical crushing by pressure on the sprouting ability of exposed rhizome buds. The effect of temperatures < 70oC... |
| Tipo: Journal paper |
Palavras-chave: Weed management. |
| Ano: 2010 |
URL: http://orgprints.org/17901/1/17901.pdf |
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| Bochtis, D.D.; Sørensen, C.G.; Jørgensen, R.N.; Nørremark, M.; Hameed, I.A.; Swain, K.C.. |
| In this paper, an integrated management system for the planning and activation of a field monitoring task is presented. The architecture of the system is built around a mobile robotic unit. The internet-based architecture of the system includes a station unit that works as a mobile on-farm operating console, the mobile robotic unit and a field server for generating and storing maps. The hypothesis is that it is possible to automate the planning and execution of the operation of monitoring the in-field weed density and species distribution. The developed planning system includes the automatic field geometrical representation and the route planning for the mobile unit. For the field representation two algorithmic approaches for automated track generation... |
| Tipo: Journal paper |
Palavras-chave: Weed management. |
| Ano: 2011 |
URL: http://orgprints.org/20659/4/20659.pdf |
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| Nørremark, M.; Ponomarev, P.; Niemelä, M.. |
| Accurate, fast and high precision tool guidance is an important capability for certain field operations such as mechanical weed control close to crop plants. This paper presents mathematical modelling and instrumentation suggestions for actuator driven tine control for close to crop mechanical weed control. An electro side shifting actuator for tool attachment was designed in AutoCAD and validated by modelling in MatLab/Simulink. Variations to load force, forward speed, plant spacing and voltage level similar to real conditions were used to verify the modelling of the side shifting system. The simulation verified that the selected permanent magnet tubular linear synchronous motor (PMTLSM) could side shift attached tools without interaction with the... |
| Tipo: Journal paper |
Palavras-chave: Buildings and machinery. |
| Ano: 2012 |
URL: http://orgprints.org/20684/4/20684.pdf |
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