Abstract
Information acquisition system of multipoint soil surface height variation for profiling mechanism of seeding unit of precision corn planter
Highlights
The emergence rate and the growth of seedlings are affected by the sowing depth[1,2,3]; a reasonable and uniform sowing depth can improve the plant emergence rate, seedling quality and plant vitality in later growing stages, which is conducive to crop production[4]
The accuracy of the surface height variation information acquired by active profiling mechanism directly affects the furrowing accuracy and uniformity[11]; accurately obtaining such information is one of the key aspects in designing an efficient active profiling mechanism[12]
Mouazen et al [22] and Saeys et al.[23] measured the soil surface height variation by acquiring the impact of surface height variations on the sensor through a ground-contact pressure sensor; Jensen et al.[24] mounted the sensor on the depth control wheel and measured the height variation through sensing the coincidence of the depth control wheel; Subsequently, Anthonis et al.[25] found that the accuracy of this method was affected by the soil surface compactness
Summary
The emergence rate and the growth of seedlings are affected by the sowing depth[1,2,3]; a reasonable and uniform sowing depth can improve the plant emergence rate, seedling quality and plant vitality in later growing stages, which is conducive to crop production[4]. The accuracy of the surface height variation information acquired by active profiling mechanism directly affects the furrowing accuracy and uniformity[11]; accurately obtaining such information is one of the key aspects in designing an efficient active profiling mechanism[12]. To measure the soil surface height variation, a profiling pallet or ground rolling wheel were used as the grounding part, and an electronic ruler, angle sensor and switch sensor were used to acquire translation and rotation signals from the grounding part[16,17,18,19,20,21].
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