关键词: 棉花, 精量穴播器, 扫描时间差算法, 播种信息, 采集系统, 空穴采集

Abstract: In order to fill the gap in informatization digitization and intelligence of precision film planting machines, a planting information collection system of cotton precision dibblers are designed. By analyzing the structure and working principle of cotton precision dibblers, six selection schemes for sowing monitoring sensors are proposed. Based on sensor selection experiments, it is finally determined that using two reflection sensors combined with a scanning time difference algorithm can achieve the accurate collection of cotton seed sowing signals. The system uses PLC as the core controller, and designs a cotton seed sowing signal acquisition program based on the scanning time difference algorithm of two reflection sensors. The bench test showed that the collection accuracy of the system was above 97%, and the cavity test proved that the cavity collection accuracy of the system was 100% at any speed. At the same time, it was found that there were 1 hole, 2 types, and holes in the hole planter. The material preparation and collection system construction for the field experiment were completed. The working speed of the seeder was adjusted to 3.5 km/h and 10 sets of seeding information collection experiments were conducted. Field experiments show that the field collection accuracy of this system can reach over 95%. The Ftest was used to analyze the homogeneity of variance between the actual number of qualified holes and the number of collected qualified holes in field experimental data. The Fvalue was less than F0.05 (9,9), and there was no significant difference between the systems collected values and the manually measured values. This indicates that the monitoring system has good accuracy and stability in field operations and can achieve accurate collection of sowing signals.

Key words: cotton, precision dibblers, the scanning time difference algorithm, planting information, collection system, hole collection