Comparative study regarding precision of sowing devices distribution.
Precision for sowing is essential in order to achieve sowing quality works for hoeing plants, ultimately influencing the high productions obtaining. This paper presents a comparative study regarding the sowing accuracy obtained in laboratory conditions on a special stand, using 3 different row units: one individual transmission and two centralized transmissions for the seed distribution devices. The researches were developed for three working speeds, three different plant densities per hectare using corn as seed material.
This paper mainly introduces the system of computer embroidery of houshold sewing machine.In this system,there is a X Y working surface which is controlled by chip microprocessors 8031.The system's characteristics and the desgin of software and hardware are also explained.