A double seed-taking cotton precision dibbler for resource-saving agriculture: A further research

Aiming at the problem that the development of drip irrigation technology under a membrane is limited by the low operation speed (less than 4 km/h) of the machine used in membrane systems, this study started from the fact that the cottonseed cannot be separated and migrated from the population in time due to the seed flow disorder during the seed-filling process. Based on the TRIZ theory, a cotton precision dibbler with double seed-taking was developed. Improve seeding speed effectively under the premise of meeting the needs of seeding. Based on the established mechanical model of the target cottonseed filling hole during double seed-taking, the effects of enforced filling angle and greet filling angle on the local seed cluster and the migration and transport of target cottonseed were analyzed. Test schemes such as the Plackett-Burman and Box-Behnken response surface tests were designed, and the parameters were optimized through numerical simulation. The optimal parameter combination was as follows: When the rotational speed was 43 r/min (corresponding to the seeding speed of 4.14 km/h), the thickness of the seed tray was 6.69 mm, and the enforced filling angle was 40.73°, the qualified index was 88.19 %, the overfilled index was 10.02 %, and the leakage index was 1.8 %. Under these conditions, using the high-speed camera technology and the bench comparison experiment of two kinds of seed trays, the seed-filling performance of the oval pit tray is better than that of the plane pit, meeting the requirements of cottonseeds’ clean production.