Study on Precision Application Rate Technology for maize no-tillage planter in North China Plain

摘要

Aiming at the problem of poor consistency of seed spacing caused by the skid of land wheel during maize no-tillage seeding, a technology for precision application rate of seed and fertilizer was studied, and a control system for seed and fertilizer synchronization precision application rate was designed based on GNSS/IMU combined sensing technology. The system which hydraulic motor replaced land wheel to drive seed metering mechanism realized real-time adjustment of seeding speed to increase quality of seeding and fertilizer. The field test was on 2BQX-6 maize no-tillage drilling machinery with precision control system. The delay distance of driven control system was 97.6 cm at speed 5.8 km/h, the error of fertilizer application rate and seed application rate were 4.91% and 3.44% at operating speed 5.8 km/h. The seeding uniformity of the system was measured between the land wheel driven planter and the hydraulic motor driven planter, the quality of feed index was relatively 87.25% and 96.00% while operating speed was 5.7km/h. If the variation range of seeding spacing shrinks 40% according the standard request, the quality of feed index of the system comparing to land wheel driven planter is relatively 90.01% and 63.23%. The results show that the precision application rate technology based on GNSS/IMU combination measuring speed can improve distribution uniformity of seed spacing.