Development of a novel mechatronic system for mechanical weed ...
Development of a novel mechatronic system for mechanical weed ...
Development of a novel mechatronic system for mechanical weed ...
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Results and discussion<br />
70<br />
5.1.4 Discussion <strong>of</strong> the plant centre position detection<br />
methodology<br />
As mentioned be<strong>for</strong>e, the presented methodology <strong>for</strong> detection <strong>of</strong> the plant<br />
centre position is an interim solution based on a simplified <strong>system</strong> using<br />
spectral and typical geometrical characteristics <strong>of</strong> plants combined with the<br />
context in<strong>for</strong>mation <strong>of</strong> the planting pattern.<br />
The main shortage <strong>of</strong> the presented <strong>system</strong> is that sensors require ad-hoc<br />
parameter adjustment be<strong>for</strong>e the measurement to provide good plant detection.<br />
For broad usage <strong>of</strong> a <strong>system</strong>, parameter adjustments need to be replaced by a<br />
more <strong>system</strong>atic method.<br />
The sensors utilised during the tests are intended <strong>for</strong> industrial detection. It<br />
needs to be confirmed that intensive application in hard field conditions will not<br />
cause negative influence on their stable work. The digital RGB fibre optic<br />
sensor CZ-H35S uses a light emitter with a spot diameter <strong>of</strong> 4.5 mm. For<br />
reliable detection the detection <strong>system</strong> needs to be improved to cover an area<br />
at least as wide as the laser sensor. This could be done by parallel<br />
implementation <strong>of</strong> several sensors but in that case the solution will be more<br />
expensive.<br />
Although the <strong>system</strong> has shortages the experimental results showed that the<br />
combination <strong>of</strong> the RGB sensor and laser sensor can be used <strong>for</strong> accurate<br />
detection <strong>of</strong> the plant centre position independently from illumination conditions.