In vegetable crops and large-scale crops, managing weeds is a critical issue during the earliest stages of growth, and has significant implications in terms of quality and finances, as well as from an environmental point of view. The technical responses to this issue are either chemical or mechanical – or even manual – depending on the type and stage of the crop and whether it is being farmed organically or conventionally.
The BIPBIP project plans to develop a mechanical solution for early intra-row weeding of vegetable crops and large-scale crops. This solution is based on a hoeing tool-block that is automatically guided by imaging and telemetry, covering a single crop row. It uses a vision system that provides crop and weed plant positions, transmitted to a decision-making system that controls a mechanical device that performs the actual weeding.
BIPBIP combines the imaging (IMS), robotics (LaBRI) and mechanical design (Elatec) skills necessary for the development of the tool-block. It is backed by the professional expertise of a farmer (Fermes Larrère) and the agronomic and experimental skills of a technical centre (CTIFL) required for producing specifications, performing tests and carrying out agronomic validation.
IMS (UMR 5218, CNRS, Univ. Bordeaux, Bordeaux INP) is a laboratory centred on systems science and engineering. The MOTIVE team focuses in particular on designing algorithms for processing images acquired using multi/hyperspectral proximal or remote sensing, particularly in response to agronomic issues (estimating yield and vigour, detecting disease).
LaBRI (UMR 5800, CNRS, Univ. Bordeaux, Bordeaux INP) is a laboratory centred on information science and technology. The Rhoban team specialises in robotics, and designs systems ranging from the humanoid robot (Robocup world champions) to robots for precision agriculture. Its achievements include designing a self-guided solution for inter-row hoeing, a vine-tying machine and a poplar planting robot.
Fermes Larrère produces and distributes conventionally and organically grown vegetables and cereal crops.
The company’s main business is carrots, and most of its agronomic, environmental, economic and societal research in focused in this area. The Larrère group is the third largest producer of conventional carrots and the leading producer of organic carrots in France.
ELATEC designs and produces innovative mechanical devices in response to farmers’ needs, particularly in organic farming. It has developed a variety of mobile electrical machines (wheel base units, straddlers) and automatic electrical systems (harvesters, motor hoes). Its horticultural straddle robot won a prize at the 2015 Agrinove competition.
CTIFL is a technical institute that carries out research and knowledge transfer relating to fruit and vegetable crops. It works in particular to develop innovative solutions such as, for example, mechanical thinning, fertilisation and irrigation tools. It continuously strives to find integrated, alternative plant protection methods.
In order to ensure that it is effective and acceptable to the profession, the weed control system developed must be:
In this framework, the crucial points are the choice of hoeing tools, the decision-making logic (distinguishing between crops/weeds and action strategy) and the action system (actuators and control). The carrier (autonomous robot or tractor) to be used is not crucial; the solution must above all be usable in different configurations of farm size, plot size, crop to be protected and method of farming these crops.
The system to be developed is a precision imaging-assisted intra-row hoeing tool-block.
This tool-block will be dedicated to weeding a single row, or possibly a « double row », as can be found in certain crops. It will operate in addition to inter-row weed control solutions, working in a zone 20 to 30 cm wide, weeding in the immediate vicinity of the row and in the spaces between the plants. This makes it possible to cover most vegetable crops (carrots, leeks, cabbages, etc.) and large-scale crops with wide inter-plant spacing (maize, sunflower, rape) in the early stages. In order to treat several rows at the same time, several tool-blocks can be installed in parallel and work abreast.
Each tool-block will be made up of three assemblies:
The tool-block must be simple and robust, and usable by operators who are not familiar with embedded precision technology. The direct consideration is the provision of an item of field equipment that can be put into operation on farms quickly and is easy to use.
Tool-block and precision imaging for early intra-row hoeing
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